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85208be0 ED |
1 | /* |
2 | * Copyright © 2012 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eugeni Dodonov <eugeni.dodonov@intel.com> | |
25 | * | |
26 | */ | |
27 | ||
2b4e57bd | 28 | #include <linux/cpufreq.h> |
85208be0 ED |
29 | #include "i915_drv.h" |
30 | #include "intel_drv.h" | |
eb48eb00 DV |
31 | #include "../../../platform/x86/intel_ips.h" |
32 | #include <linux/module.h> | |
85208be0 | 33 | |
057d3860 | 34 | #define FORCEWAKE_ACK_TIMEOUT_MS 2 |
b67a4376 | 35 | |
f6750b3c ED |
36 | /* FBC, or Frame Buffer Compression, is a technique employed to compress the |
37 | * framebuffer contents in-memory, aiming at reducing the required bandwidth | |
38 | * during in-memory transfers and, therefore, reduce the power packet. | |
85208be0 | 39 | * |
f6750b3c ED |
40 | * The benefits of FBC are mostly visible with solid backgrounds and |
41 | * variation-less patterns. | |
85208be0 | 42 | * |
f6750b3c ED |
43 | * FBC-related functionality can be enabled by the means of the |
44 | * i915.i915_enable_fbc parameter | |
85208be0 ED |
45 | */ |
46 | ||
3490ea5d CW |
47 | static bool intel_crtc_active(struct drm_crtc *crtc) |
48 | { | |
49 | /* Be paranoid as we can arrive here with only partial | |
50 | * state retrieved from the hardware during setup. | |
51 | */ | |
52 | return to_intel_crtc(crtc)->active && crtc->fb && crtc->mode.clock; | |
53 | } | |
54 | ||
1fa61106 | 55 | static void i8xx_disable_fbc(struct drm_device *dev) |
85208be0 ED |
56 | { |
57 | struct drm_i915_private *dev_priv = dev->dev_private; | |
58 | u32 fbc_ctl; | |
59 | ||
60 | /* Disable compression */ | |
61 | fbc_ctl = I915_READ(FBC_CONTROL); | |
62 | if ((fbc_ctl & FBC_CTL_EN) == 0) | |
63 | return; | |
64 | ||
65 | fbc_ctl &= ~FBC_CTL_EN; | |
66 | I915_WRITE(FBC_CONTROL, fbc_ctl); | |
67 | ||
68 | /* Wait for compressing bit to clear */ | |
69 | if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) { | |
70 | DRM_DEBUG_KMS("FBC idle timed out\n"); | |
71 | return; | |
72 | } | |
73 | ||
74 | DRM_DEBUG_KMS("disabled FBC\n"); | |
75 | } | |
76 | ||
1fa61106 | 77 | static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
85208be0 ED |
78 | { |
79 | struct drm_device *dev = crtc->dev; | |
80 | struct drm_i915_private *dev_priv = dev->dev_private; | |
81 | struct drm_framebuffer *fb = crtc->fb; | |
82 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
83 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
84 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
85 | int cfb_pitch; | |
86 | int plane, i; | |
87 | u32 fbc_ctl, fbc_ctl2; | |
88 | ||
89 | cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE; | |
90 | if (fb->pitches[0] < cfb_pitch) | |
91 | cfb_pitch = fb->pitches[0]; | |
92 | ||
93 | /* FBC_CTL wants 64B units */ | |
94 | cfb_pitch = (cfb_pitch / 64) - 1; | |
95 | plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB; | |
96 | ||
97 | /* Clear old tags */ | |
98 | for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) | |
99 | I915_WRITE(FBC_TAG + (i * 4), 0); | |
100 | ||
101 | /* Set it up... */ | |
102 | fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; | |
103 | fbc_ctl2 |= plane; | |
104 | I915_WRITE(FBC_CONTROL2, fbc_ctl2); | |
105 | I915_WRITE(FBC_FENCE_OFF, crtc->y); | |
106 | ||
107 | /* enable it... */ | |
108 | fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC; | |
109 | if (IS_I945GM(dev)) | |
110 | fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ | |
111 | fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; | |
112 | fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT; | |
113 | fbc_ctl |= obj->fence_reg; | |
114 | I915_WRITE(FBC_CONTROL, fbc_ctl); | |
115 | ||
84f44ce7 VS |
116 | DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ", |
117 | cfb_pitch, crtc->y, plane_name(intel_crtc->plane)); | |
85208be0 ED |
118 | } |
119 | ||
1fa61106 | 120 | static bool i8xx_fbc_enabled(struct drm_device *dev) |
85208be0 ED |
121 | { |
122 | struct drm_i915_private *dev_priv = dev->dev_private; | |
123 | ||
124 | return I915_READ(FBC_CONTROL) & FBC_CTL_EN; | |
125 | } | |
126 | ||
1fa61106 | 127 | static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
85208be0 ED |
128 | { |
129 | struct drm_device *dev = crtc->dev; | |
130 | struct drm_i915_private *dev_priv = dev->dev_private; | |
131 | struct drm_framebuffer *fb = crtc->fb; | |
132 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
133 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
134 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
135 | int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; | |
136 | unsigned long stall_watermark = 200; | |
137 | u32 dpfc_ctl; | |
138 | ||
139 | dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X; | |
140 | dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg; | |
141 | I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY); | |
142 | ||
143 | I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | | |
144 | (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | | |
145 | (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); | |
146 | I915_WRITE(DPFC_FENCE_YOFF, crtc->y); | |
147 | ||
148 | /* enable it... */ | |
149 | I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN); | |
150 | ||
84f44ce7 | 151 | DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); |
85208be0 ED |
152 | } |
153 | ||
1fa61106 | 154 | static void g4x_disable_fbc(struct drm_device *dev) |
85208be0 ED |
155 | { |
156 | struct drm_i915_private *dev_priv = dev->dev_private; | |
157 | u32 dpfc_ctl; | |
158 | ||
159 | /* Disable compression */ | |
160 | dpfc_ctl = I915_READ(DPFC_CONTROL); | |
161 | if (dpfc_ctl & DPFC_CTL_EN) { | |
162 | dpfc_ctl &= ~DPFC_CTL_EN; | |
163 | I915_WRITE(DPFC_CONTROL, dpfc_ctl); | |
164 | ||
165 | DRM_DEBUG_KMS("disabled FBC\n"); | |
166 | } | |
167 | } | |
168 | ||
1fa61106 | 169 | static bool g4x_fbc_enabled(struct drm_device *dev) |
85208be0 ED |
170 | { |
171 | struct drm_i915_private *dev_priv = dev->dev_private; | |
172 | ||
173 | return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; | |
174 | } | |
175 | ||
176 | static void sandybridge_blit_fbc_update(struct drm_device *dev) | |
177 | { | |
178 | struct drm_i915_private *dev_priv = dev->dev_private; | |
179 | u32 blt_ecoskpd; | |
180 | ||
181 | /* Make sure blitter notifies FBC of writes */ | |
182 | gen6_gt_force_wake_get(dev_priv); | |
183 | blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD); | |
184 | blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY << | |
185 | GEN6_BLITTER_LOCK_SHIFT; | |
186 | I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); | |
187 | blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY; | |
188 | I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); | |
189 | blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY << | |
190 | GEN6_BLITTER_LOCK_SHIFT); | |
191 | I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); | |
192 | POSTING_READ(GEN6_BLITTER_ECOSKPD); | |
193 | gen6_gt_force_wake_put(dev_priv); | |
194 | } | |
195 | ||
1fa61106 | 196 | static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
85208be0 ED |
197 | { |
198 | struct drm_device *dev = crtc->dev; | |
199 | struct drm_i915_private *dev_priv = dev->dev_private; | |
200 | struct drm_framebuffer *fb = crtc->fb; | |
201 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
202 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
203 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
204 | int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; | |
205 | unsigned long stall_watermark = 200; | |
206 | u32 dpfc_ctl; | |
207 | ||
208 | dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); | |
209 | dpfc_ctl &= DPFC_RESERVED; | |
210 | dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X); | |
211 | /* Set persistent mode for front-buffer rendering, ala X. */ | |
212 | dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE; | |
213 | dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg); | |
214 | I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY); | |
215 | ||
216 | I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | | |
217 | (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | | |
218 | (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); | |
219 | I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); | |
220 | I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID); | |
221 | /* enable it... */ | |
222 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); | |
223 | ||
224 | if (IS_GEN6(dev)) { | |
225 | I915_WRITE(SNB_DPFC_CTL_SA, | |
226 | SNB_CPU_FENCE_ENABLE | obj->fence_reg); | |
227 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); | |
228 | sandybridge_blit_fbc_update(dev); | |
229 | } | |
230 | ||
84f44ce7 | 231 | DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); |
85208be0 ED |
232 | } |
233 | ||
1fa61106 | 234 | static void ironlake_disable_fbc(struct drm_device *dev) |
85208be0 ED |
235 | { |
236 | struct drm_i915_private *dev_priv = dev->dev_private; | |
237 | u32 dpfc_ctl; | |
238 | ||
239 | /* Disable compression */ | |
240 | dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); | |
241 | if (dpfc_ctl & DPFC_CTL_EN) { | |
242 | dpfc_ctl &= ~DPFC_CTL_EN; | |
243 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); | |
244 | ||
b74ea102 | 245 | if (IS_IVYBRIDGE(dev)) |
7dd23ba0 | 246 | /* WaFbcDisableDpfcClockGating:ivb */ |
b74ea102 RV |
247 | I915_WRITE(ILK_DSPCLK_GATE_D, |
248 | I915_READ(ILK_DSPCLK_GATE_D) & | |
249 | ~ILK_DPFCUNIT_CLOCK_GATE_DISABLE); | |
250 | ||
d89f2071 | 251 | if (IS_HASWELL(dev)) |
7dd23ba0 | 252 | /* WaFbcDisableDpfcClockGating:hsw */ |
d89f2071 RV |
253 | I915_WRITE(HSW_CLKGATE_DISABLE_PART_1, |
254 | I915_READ(HSW_CLKGATE_DISABLE_PART_1) & | |
255 | ~HSW_DPFC_GATING_DISABLE); | |
256 | ||
85208be0 ED |
257 | DRM_DEBUG_KMS("disabled FBC\n"); |
258 | } | |
259 | } | |
260 | ||
1fa61106 | 261 | static bool ironlake_fbc_enabled(struct drm_device *dev) |
85208be0 ED |
262 | { |
263 | struct drm_i915_private *dev_priv = dev->dev_private; | |
264 | ||
265 | return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; | |
266 | } | |
267 | ||
abe959c7 RV |
268 | static void gen7_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
269 | { | |
270 | struct drm_device *dev = crtc->dev; | |
271 | struct drm_i915_private *dev_priv = dev->dev_private; | |
272 | struct drm_framebuffer *fb = crtc->fb; | |
273 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
274 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
275 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
276 | ||
fd3da6c9 | 277 | I915_WRITE(IVB_FBC_RT_BASE, obj->gtt_offset); |
abe959c7 RV |
278 | |
279 | I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X | | |
280 | IVB_DPFC_CTL_FENCE_EN | | |
281 | intel_crtc->plane << IVB_DPFC_CTL_PLANE_SHIFT); | |
282 | ||
891348b2 | 283 | if (IS_IVYBRIDGE(dev)) { |
7dd23ba0 | 284 | /* WaFbcAsynchFlipDisableFbcQueue:ivb */ |
891348b2 | 285 | I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS); |
7dd23ba0 | 286 | /* WaFbcDisableDpfcClockGating:ivb */ |
891348b2 RV |
287 | I915_WRITE(ILK_DSPCLK_GATE_D, |
288 | I915_READ(ILK_DSPCLK_GATE_D) | | |
289 | ILK_DPFCUNIT_CLOCK_GATE_DISABLE); | |
28554164 | 290 | } else { |
7dd23ba0 | 291 | /* WaFbcAsynchFlipDisableFbcQueue:hsw */ |
28554164 RV |
292 | I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe), |
293 | HSW_BYPASS_FBC_QUEUE); | |
7dd23ba0 | 294 | /* WaFbcDisableDpfcClockGating:hsw */ |
d89f2071 RV |
295 | I915_WRITE(HSW_CLKGATE_DISABLE_PART_1, |
296 | I915_READ(HSW_CLKGATE_DISABLE_PART_1) | | |
297 | HSW_DPFC_GATING_DISABLE); | |
891348b2 | 298 | } |
b74ea102 | 299 | |
abe959c7 RV |
300 | I915_WRITE(SNB_DPFC_CTL_SA, |
301 | SNB_CPU_FENCE_ENABLE | obj->fence_reg); | |
302 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); | |
303 | ||
304 | sandybridge_blit_fbc_update(dev); | |
305 | ||
306 | DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane); | |
307 | } | |
308 | ||
85208be0 ED |
309 | bool intel_fbc_enabled(struct drm_device *dev) |
310 | { | |
311 | struct drm_i915_private *dev_priv = dev->dev_private; | |
312 | ||
313 | if (!dev_priv->display.fbc_enabled) | |
314 | return false; | |
315 | ||
316 | return dev_priv->display.fbc_enabled(dev); | |
317 | } | |
318 | ||
319 | static void intel_fbc_work_fn(struct work_struct *__work) | |
320 | { | |
321 | struct intel_fbc_work *work = | |
322 | container_of(to_delayed_work(__work), | |
323 | struct intel_fbc_work, work); | |
324 | struct drm_device *dev = work->crtc->dev; | |
325 | struct drm_i915_private *dev_priv = dev->dev_private; | |
326 | ||
327 | mutex_lock(&dev->struct_mutex); | |
328 | if (work == dev_priv->fbc_work) { | |
329 | /* Double check that we haven't switched fb without cancelling | |
330 | * the prior work. | |
331 | */ | |
332 | if (work->crtc->fb == work->fb) { | |
333 | dev_priv->display.enable_fbc(work->crtc, | |
334 | work->interval); | |
335 | ||
336 | dev_priv->cfb_plane = to_intel_crtc(work->crtc)->plane; | |
337 | dev_priv->cfb_fb = work->crtc->fb->base.id; | |
338 | dev_priv->cfb_y = work->crtc->y; | |
339 | } | |
340 | ||
341 | dev_priv->fbc_work = NULL; | |
342 | } | |
343 | mutex_unlock(&dev->struct_mutex); | |
344 | ||
345 | kfree(work); | |
346 | } | |
347 | ||
348 | static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv) | |
349 | { | |
350 | if (dev_priv->fbc_work == NULL) | |
351 | return; | |
352 | ||
353 | DRM_DEBUG_KMS("cancelling pending FBC enable\n"); | |
354 | ||
355 | /* Synchronisation is provided by struct_mutex and checking of | |
356 | * dev_priv->fbc_work, so we can perform the cancellation | |
357 | * entirely asynchronously. | |
358 | */ | |
359 | if (cancel_delayed_work(&dev_priv->fbc_work->work)) | |
360 | /* tasklet was killed before being run, clean up */ | |
361 | kfree(dev_priv->fbc_work); | |
362 | ||
363 | /* Mark the work as no longer wanted so that if it does | |
364 | * wake-up (because the work was already running and waiting | |
365 | * for our mutex), it will discover that is no longer | |
366 | * necessary to run. | |
367 | */ | |
368 | dev_priv->fbc_work = NULL; | |
369 | } | |
370 | ||
371 | void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval) | |
372 | { | |
373 | struct intel_fbc_work *work; | |
374 | struct drm_device *dev = crtc->dev; | |
375 | struct drm_i915_private *dev_priv = dev->dev_private; | |
376 | ||
377 | if (!dev_priv->display.enable_fbc) | |
378 | return; | |
379 | ||
380 | intel_cancel_fbc_work(dev_priv); | |
381 | ||
382 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
383 | if (work == NULL) { | |
6cdcb5e7 | 384 | DRM_ERROR("Failed to allocate FBC work structure\n"); |
85208be0 ED |
385 | dev_priv->display.enable_fbc(crtc, interval); |
386 | return; | |
387 | } | |
388 | ||
389 | work->crtc = crtc; | |
390 | work->fb = crtc->fb; | |
391 | work->interval = interval; | |
392 | INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); | |
393 | ||
394 | dev_priv->fbc_work = work; | |
395 | ||
85208be0 ED |
396 | /* Delay the actual enabling to let pageflipping cease and the |
397 | * display to settle before starting the compression. Note that | |
398 | * this delay also serves a second purpose: it allows for a | |
399 | * vblank to pass after disabling the FBC before we attempt | |
400 | * to modify the control registers. | |
401 | * | |
402 | * A more complicated solution would involve tracking vblanks | |
403 | * following the termination of the page-flipping sequence | |
404 | * and indeed performing the enable as a co-routine and not | |
405 | * waiting synchronously upon the vblank. | |
406 | */ | |
407 | schedule_delayed_work(&work->work, msecs_to_jiffies(50)); | |
408 | } | |
409 | ||
410 | void intel_disable_fbc(struct drm_device *dev) | |
411 | { | |
412 | struct drm_i915_private *dev_priv = dev->dev_private; | |
413 | ||
414 | intel_cancel_fbc_work(dev_priv); | |
415 | ||
416 | if (!dev_priv->display.disable_fbc) | |
417 | return; | |
418 | ||
419 | dev_priv->display.disable_fbc(dev); | |
420 | dev_priv->cfb_plane = -1; | |
421 | } | |
422 | ||
423 | /** | |
424 | * intel_update_fbc - enable/disable FBC as needed | |
425 | * @dev: the drm_device | |
426 | * | |
427 | * Set up the framebuffer compression hardware at mode set time. We | |
428 | * enable it if possible: | |
429 | * - plane A only (on pre-965) | |
430 | * - no pixel mulitply/line duplication | |
431 | * - no alpha buffer discard | |
432 | * - no dual wide | |
f85da868 | 433 | * - framebuffer <= max_hdisplay in width, max_vdisplay in height |
85208be0 ED |
434 | * |
435 | * We can't assume that any compression will take place (worst case), | |
436 | * so the compressed buffer has to be the same size as the uncompressed | |
437 | * one. It also must reside (along with the line length buffer) in | |
438 | * stolen memory. | |
439 | * | |
440 | * We need to enable/disable FBC on a global basis. | |
441 | */ | |
442 | void intel_update_fbc(struct drm_device *dev) | |
443 | { | |
444 | struct drm_i915_private *dev_priv = dev->dev_private; | |
445 | struct drm_crtc *crtc = NULL, *tmp_crtc; | |
446 | struct intel_crtc *intel_crtc; | |
447 | struct drm_framebuffer *fb; | |
448 | struct intel_framebuffer *intel_fb; | |
449 | struct drm_i915_gem_object *obj; | |
450 | int enable_fbc; | |
f85da868 | 451 | unsigned int max_hdisplay, max_vdisplay; |
85208be0 | 452 | |
85208be0 ED |
453 | if (!i915_powersave) |
454 | return; | |
455 | ||
456 | if (!I915_HAS_FBC(dev)) | |
457 | return; | |
458 | ||
459 | /* | |
460 | * If FBC is already on, we just have to verify that we can | |
461 | * keep it that way... | |
462 | * Need to disable if: | |
463 | * - more than one pipe is active | |
464 | * - changing FBC params (stride, fence, mode) | |
465 | * - new fb is too large to fit in compressed buffer | |
466 | * - going to an unsupported config (interlace, pixel multiply, etc.) | |
467 | */ | |
468 | list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) { | |
3490ea5d CW |
469 | if (intel_crtc_active(tmp_crtc) && |
470 | !to_intel_crtc(tmp_crtc)->primary_disabled) { | |
85208be0 ED |
471 | if (crtc) { |
472 | DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); | |
473 | dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES; | |
474 | goto out_disable; | |
475 | } | |
476 | crtc = tmp_crtc; | |
477 | } | |
478 | } | |
479 | ||
480 | if (!crtc || crtc->fb == NULL) { | |
481 | DRM_DEBUG_KMS("no output, disabling\n"); | |
482 | dev_priv->no_fbc_reason = FBC_NO_OUTPUT; | |
483 | goto out_disable; | |
484 | } | |
485 | ||
486 | intel_crtc = to_intel_crtc(crtc); | |
487 | fb = crtc->fb; | |
488 | intel_fb = to_intel_framebuffer(fb); | |
489 | obj = intel_fb->obj; | |
490 | ||
491 | enable_fbc = i915_enable_fbc; | |
492 | if (enable_fbc < 0) { | |
493 | DRM_DEBUG_KMS("fbc set to per-chip default\n"); | |
494 | enable_fbc = 1; | |
891348b2 | 495 | if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) |
85208be0 ED |
496 | enable_fbc = 0; |
497 | } | |
498 | if (!enable_fbc) { | |
499 | DRM_DEBUG_KMS("fbc disabled per module param\n"); | |
500 | dev_priv->no_fbc_reason = FBC_MODULE_PARAM; | |
501 | goto out_disable; | |
502 | } | |
85208be0 ED |
503 | if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) || |
504 | (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) { | |
505 | DRM_DEBUG_KMS("mode incompatible with compression, " | |
506 | "disabling\n"); | |
507 | dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE; | |
508 | goto out_disable; | |
509 | } | |
f85da868 PZ |
510 | |
511 | if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { | |
512 | max_hdisplay = 4096; | |
513 | max_vdisplay = 2048; | |
514 | } else { | |
515 | max_hdisplay = 2048; | |
516 | max_vdisplay = 1536; | |
517 | } | |
518 | if ((crtc->mode.hdisplay > max_hdisplay) || | |
519 | (crtc->mode.vdisplay > max_vdisplay)) { | |
85208be0 ED |
520 | DRM_DEBUG_KMS("mode too large for compression, disabling\n"); |
521 | dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE; | |
522 | goto out_disable; | |
523 | } | |
891348b2 RV |
524 | if ((IS_I915GM(dev) || IS_I945GM(dev) || IS_HASWELL(dev)) && |
525 | intel_crtc->plane != 0) { | |
85208be0 ED |
526 | DRM_DEBUG_KMS("plane not 0, disabling compression\n"); |
527 | dev_priv->no_fbc_reason = FBC_BAD_PLANE; | |
528 | goto out_disable; | |
529 | } | |
530 | ||
531 | /* The use of a CPU fence is mandatory in order to detect writes | |
532 | * by the CPU to the scanout and trigger updates to the FBC. | |
533 | */ | |
534 | if (obj->tiling_mode != I915_TILING_X || | |
535 | obj->fence_reg == I915_FENCE_REG_NONE) { | |
536 | DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n"); | |
537 | dev_priv->no_fbc_reason = FBC_NOT_TILED; | |
538 | goto out_disable; | |
539 | } | |
540 | ||
541 | /* If the kernel debugger is active, always disable compression */ | |
542 | if (in_dbg_master()) | |
543 | goto out_disable; | |
544 | ||
11be49eb | 545 | if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) { |
11be49eb CW |
546 | DRM_DEBUG_KMS("framebuffer too large, disabling compression\n"); |
547 | dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; | |
548 | goto out_disable; | |
549 | } | |
550 | ||
85208be0 ED |
551 | /* If the scanout has not changed, don't modify the FBC settings. |
552 | * Note that we make the fundamental assumption that the fb->obj | |
553 | * cannot be unpinned (and have its GTT offset and fence revoked) | |
554 | * without first being decoupled from the scanout and FBC disabled. | |
555 | */ | |
556 | if (dev_priv->cfb_plane == intel_crtc->plane && | |
557 | dev_priv->cfb_fb == fb->base.id && | |
558 | dev_priv->cfb_y == crtc->y) | |
559 | return; | |
560 | ||
561 | if (intel_fbc_enabled(dev)) { | |
562 | /* We update FBC along two paths, after changing fb/crtc | |
563 | * configuration (modeswitching) and after page-flipping | |
564 | * finishes. For the latter, we know that not only did | |
565 | * we disable the FBC at the start of the page-flip | |
566 | * sequence, but also more than one vblank has passed. | |
567 | * | |
568 | * For the former case of modeswitching, it is possible | |
569 | * to switch between two FBC valid configurations | |
570 | * instantaneously so we do need to disable the FBC | |
571 | * before we can modify its control registers. We also | |
572 | * have to wait for the next vblank for that to take | |
573 | * effect. However, since we delay enabling FBC we can | |
574 | * assume that a vblank has passed since disabling and | |
575 | * that we can safely alter the registers in the deferred | |
576 | * callback. | |
577 | * | |
578 | * In the scenario that we go from a valid to invalid | |
579 | * and then back to valid FBC configuration we have | |
580 | * no strict enforcement that a vblank occurred since | |
581 | * disabling the FBC. However, along all current pipe | |
582 | * disabling paths we do need to wait for a vblank at | |
583 | * some point. And we wait before enabling FBC anyway. | |
584 | */ | |
585 | DRM_DEBUG_KMS("disabling active FBC for update\n"); | |
586 | intel_disable_fbc(dev); | |
587 | } | |
588 | ||
589 | intel_enable_fbc(crtc, 500); | |
590 | return; | |
591 | ||
592 | out_disable: | |
593 | /* Multiple disables should be harmless */ | |
594 | if (intel_fbc_enabled(dev)) { | |
595 | DRM_DEBUG_KMS("unsupported config, disabling FBC\n"); | |
596 | intel_disable_fbc(dev); | |
597 | } | |
11be49eb | 598 | i915_gem_stolen_cleanup_compression(dev); |
85208be0 ED |
599 | } |
600 | ||
c921aba8 DV |
601 | static void i915_pineview_get_mem_freq(struct drm_device *dev) |
602 | { | |
603 | drm_i915_private_t *dev_priv = dev->dev_private; | |
604 | u32 tmp; | |
605 | ||
606 | tmp = I915_READ(CLKCFG); | |
607 | ||
608 | switch (tmp & CLKCFG_FSB_MASK) { | |
609 | case CLKCFG_FSB_533: | |
610 | dev_priv->fsb_freq = 533; /* 133*4 */ | |
611 | break; | |
612 | case CLKCFG_FSB_800: | |
613 | dev_priv->fsb_freq = 800; /* 200*4 */ | |
614 | break; | |
615 | case CLKCFG_FSB_667: | |
616 | dev_priv->fsb_freq = 667; /* 167*4 */ | |
617 | break; | |
618 | case CLKCFG_FSB_400: | |
619 | dev_priv->fsb_freq = 400; /* 100*4 */ | |
620 | break; | |
621 | } | |
622 | ||
623 | switch (tmp & CLKCFG_MEM_MASK) { | |
624 | case CLKCFG_MEM_533: | |
625 | dev_priv->mem_freq = 533; | |
626 | break; | |
627 | case CLKCFG_MEM_667: | |
628 | dev_priv->mem_freq = 667; | |
629 | break; | |
630 | case CLKCFG_MEM_800: | |
631 | dev_priv->mem_freq = 800; | |
632 | break; | |
633 | } | |
634 | ||
635 | /* detect pineview DDR3 setting */ | |
636 | tmp = I915_READ(CSHRDDR3CTL); | |
637 | dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0; | |
638 | } | |
639 | ||
640 | static void i915_ironlake_get_mem_freq(struct drm_device *dev) | |
641 | { | |
642 | drm_i915_private_t *dev_priv = dev->dev_private; | |
643 | u16 ddrpll, csipll; | |
644 | ||
645 | ddrpll = I915_READ16(DDRMPLL1); | |
646 | csipll = I915_READ16(CSIPLL0); | |
647 | ||
648 | switch (ddrpll & 0xff) { | |
649 | case 0xc: | |
650 | dev_priv->mem_freq = 800; | |
651 | break; | |
652 | case 0x10: | |
653 | dev_priv->mem_freq = 1066; | |
654 | break; | |
655 | case 0x14: | |
656 | dev_priv->mem_freq = 1333; | |
657 | break; | |
658 | case 0x18: | |
659 | dev_priv->mem_freq = 1600; | |
660 | break; | |
661 | default: | |
662 | DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n", | |
663 | ddrpll & 0xff); | |
664 | dev_priv->mem_freq = 0; | |
665 | break; | |
666 | } | |
667 | ||
20e4d407 | 668 | dev_priv->ips.r_t = dev_priv->mem_freq; |
c921aba8 DV |
669 | |
670 | switch (csipll & 0x3ff) { | |
671 | case 0x00c: | |
672 | dev_priv->fsb_freq = 3200; | |
673 | break; | |
674 | case 0x00e: | |
675 | dev_priv->fsb_freq = 3733; | |
676 | break; | |
677 | case 0x010: | |
678 | dev_priv->fsb_freq = 4266; | |
679 | break; | |
680 | case 0x012: | |
681 | dev_priv->fsb_freq = 4800; | |
682 | break; | |
683 | case 0x014: | |
684 | dev_priv->fsb_freq = 5333; | |
685 | break; | |
686 | case 0x016: | |
687 | dev_priv->fsb_freq = 5866; | |
688 | break; | |
689 | case 0x018: | |
690 | dev_priv->fsb_freq = 6400; | |
691 | break; | |
692 | default: | |
693 | DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n", | |
694 | csipll & 0x3ff); | |
695 | dev_priv->fsb_freq = 0; | |
696 | break; | |
697 | } | |
698 | ||
699 | if (dev_priv->fsb_freq == 3200) { | |
20e4d407 | 700 | dev_priv->ips.c_m = 0; |
c921aba8 | 701 | } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) { |
20e4d407 | 702 | dev_priv->ips.c_m = 1; |
c921aba8 | 703 | } else { |
20e4d407 | 704 | dev_priv->ips.c_m = 2; |
c921aba8 DV |
705 | } |
706 | } | |
707 | ||
b445e3b0 ED |
708 | static const struct cxsr_latency cxsr_latency_table[] = { |
709 | {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */ | |
710 | {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */ | |
711 | {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */ | |
712 | {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */ | |
713 | {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */ | |
714 | ||
715 | {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */ | |
716 | {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */ | |
717 | {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */ | |
718 | {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */ | |
719 | {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */ | |
720 | ||
721 | {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */ | |
722 | {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */ | |
723 | {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */ | |
724 | {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */ | |
725 | {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */ | |
726 | ||
727 | {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */ | |
728 | {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */ | |
729 | {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */ | |
730 | {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */ | |
731 | {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */ | |
732 | ||
733 | {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */ | |
734 | {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */ | |
735 | {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */ | |
736 | {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */ | |
737 | {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */ | |
738 | ||
739 | {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */ | |
740 | {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */ | |
741 | {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */ | |
742 | {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */ | |
743 | {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */ | |
744 | }; | |
745 | ||
63c62275 | 746 | static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop, |
b445e3b0 ED |
747 | int is_ddr3, |
748 | int fsb, | |
749 | int mem) | |
750 | { | |
751 | const struct cxsr_latency *latency; | |
752 | int i; | |
753 | ||
754 | if (fsb == 0 || mem == 0) | |
755 | return NULL; | |
756 | ||
757 | for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) { | |
758 | latency = &cxsr_latency_table[i]; | |
759 | if (is_desktop == latency->is_desktop && | |
760 | is_ddr3 == latency->is_ddr3 && | |
761 | fsb == latency->fsb_freq && mem == latency->mem_freq) | |
762 | return latency; | |
763 | } | |
764 | ||
765 | DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); | |
766 | ||
767 | return NULL; | |
768 | } | |
769 | ||
1fa61106 | 770 | static void pineview_disable_cxsr(struct drm_device *dev) |
b445e3b0 ED |
771 | { |
772 | struct drm_i915_private *dev_priv = dev->dev_private; | |
773 | ||
774 | /* deactivate cxsr */ | |
775 | I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN); | |
776 | } | |
777 | ||
778 | /* | |
779 | * Latency for FIFO fetches is dependent on several factors: | |
780 | * - memory configuration (speed, channels) | |
781 | * - chipset | |
782 | * - current MCH state | |
783 | * It can be fairly high in some situations, so here we assume a fairly | |
784 | * pessimal value. It's a tradeoff between extra memory fetches (if we | |
785 | * set this value too high, the FIFO will fetch frequently to stay full) | |
786 | * and power consumption (set it too low to save power and we might see | |
787 | * FIFO underruns and display "flicker"). | |
788 | * | |
789 | * A value of 5us seems to be a good balance; safe for very low end | |
790 | * platforms but not overly aggressive on lower latency configs. | |
791 | */ | |
792 | static const int latency_ns = 5000; | |
793 | ||
1fa61106 | 794 | static int i9xx_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
795 | { |
796 | struct drm_i915_private *dev_priv = dev->dev_private; | |
797 | uint32_t dsparb = I915_READ(DSPARB); | |
798 | int size; | |
799 | ||
800 | size = dsparb & 0x7f; | |
801 | if (plane) | |
802 | size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size; | |
803 | ||
804 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
805 | plane ? "B" : "A", size); | |
806 | ||
807 | return size; | |
808 | } | |
809 | ||
1fa61106 | 810 | static int i85x_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
811 | { |
812 | struct drm_i915_private *dev_priv = dev->dev_private; | |
813 | uint32_t dsparb = I915_READ(DSPARB); | |
814 | int size; | |
815 | ||
816 | size = dsparb & 0x1ff; | |
817 | if (plane) | |
818 | size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size; | |
819 | size >>= 1; /* Convert to cachelines */ | |
820 | ||
821 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
822 | plane ? "B" : "A", size); | |
823 | ||
824 | return size; | |
825 | } | |
826 | ||
1fa61106 | 827 | static int i845_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
828 | { |
829 | struct drm_i915_private *dev_priv = dev->dev_private; | |
830 | uint32_t dsparb = I915_READ(DSPARB); | |
831 | int size; | |
832 | ||
833 | size = dsparb & 0x7f; | |
834 | size >>= 2; /* Convert to cachelines */ | |
835 | ||
836 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
837 | plane ? "B" : "A", | |
838 | size); | |
839 | ||
840 | return size; | |
841 | } | |
842 | ||
1fa61106 | 843 | static int i830_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
844 | { |
845 | struct drm_i915_private *dev_priv = dev->dev_private; | |
846 | uint32_t dsparb = I915_READ(DSPARB); | |
847 | int size; | |
848 | ||
849 | size = dsparb & 0x7f; | |
850 | size >>= 1; /* Convert to cachelines */ | |
851 | ||
852 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
853 | plane ? "B" : "A", size); | |
854 | ||
855 | return size; | |
856 | } | |
857 | ||
858 | /* Pineview has different values for various configs */ | |
859 | static const struct intel_watermark_params pineview_display_wm = { | |
860 | PINEVIEW_DISPLAY_FIFO, | |
861 | PINEVIEW_MAX_WM, | |
862 | PINEVIEW_DFT_WM, | |
863 | PINEVIEW_GUARD_WM, | |
864 | PINEVIEW_FIFO_LINE_SIZE | |
865 | }; | |
866 | static const struct intel_watermark_params pineview_display_hplloff_wm = { | |
867 | PINEVIEW_DISPLAY_FIFO, | |
868 | PINEVIEW_MAX_WM, | |
869 | PINEVIEW_DFT_HPLLOFF_WM, | |
870 | PINEVIEW_GUARD_WM, | |
871 | PINEVIEW_FIFO_LINE_SIZE | |
872 | }; | |
873 | static const struct intel_watermark_params pineview_cursor_wm = { | |
874 | PINEVIEW_CURSOR_FIFO, | |
875 | PINEVIEW_CURSOR_MAX_WM, | |
876 | PINEVIEW_CURSOR_DFT_WM, | |
877 | PINEVIEW_CURSOR_GUARD_WM, | |
878 | PINEVIEW_FIFO_LINE_SIZE, | |
879 | }; | |
880 | static const struct intel_watermark_params pineview_cursor_hplloff_wm = { | |
881 | PINEVIEW_CURSOR_FIFO, | |
882 | PINEVIEW_CURSOR_MAX_WM, | |
883 | PINEVIEW_CURSOR_DFT_WM, | |
884 | PINEVIEW_CURSOR_GUARD_WM, | |
885 | PINEVIEW_FIFO_LINE_SIZE | |
886 | }; | |
887 | static const struct intel_watermark_params g4x_wm_info = { | |
888 | G4X_FIFO_SIZE, | |
889 | G4X_MAX_WM, | |
890 | G4X_MAX_WM, | |
891 | 2, | |
892 | G4X_FIFO_LINE_SIZE, | |
893 | }; | |
894 | static const struct intel_watermark_params g4x_cursor_wm_info = { | |
895 | I965_CURSOR_FIFO, | |
896 | I965_CURSOR_MAX_WM, | |
897 | I965_CURSOR_DFT_WM, | |
898 | 2, | |
899 | G4X_FIFO_LINE_SIZE, | |
900 | }; | |
901 | static const struct intel_watermark_params valleyview_wm_info = { | |
902 | VALLEYVIEW_FIFO_SIZE, | |
903 | VALLEYVIEW_MAX_WM, | |
904 | VALLEYVIEW_MAX_WM, | |
905 | 2, | |
906 | G4X_FIFO_LINE_SIZE, | |
907 | }; | |
908 | static const struct intel_watermark_params valleyview_cursor_wm_info = { | |
909 | I965_CURSOR_FIFO, | |
910 | VALLEYVIEW_CURSOR_MAX_WM, | |
911 | I965_CURSOR_DFT_WM, | |
912 | 2, | |
913 | G4X_FIFO_LINE_SIZE, | |
914 | }; | |
915 | static const struct intel_watermark_params i965_cursor_wm_info = { | |
916 | I965_CURSOR_FIFO, | |
917 | I965_CURSOR_MAX_WM, | |
918 | I965_CURSOR_DFT_WM, | |
919 | 2, | |
920 | I915_FIFO_LINE_SIZE, | |
921 | }; | |
922 | static const struct intel_watermark_params i945_wm_info = { | |
923 | I945_FIFO_SIZE, | |
924 | I915_MAX_WM, | |
925 | 1, | |
926 | 2, | |
927 | I915_FIFO_LINE_SIZE | |
928 | }; | |
929 | static const struct intel_watermark_params i915_wm_info = { | |
930 | I915_FIFO_SIZE, | |
931 | I915_MAX_WM, | |
932 | 1, | |
933 | 2, | |
934 | I915_FIFO_LINE_SIZE | |
935 | }; | |
936 | static const struct intel_watermark_params i855_wm_info = { | |
937 | I855GM_FIFO_SIZE, | |
938 | I915_MAX_WM, | |
939 | 1, | |
940 | 2, | |
941 | I830_FIFO_LINE_SIZE | |
942 | }; | |
943 | static const struct intel_watermark_params i830_wm_info = { | |
944 | I830_FIFO_SIZE, | |
945 | I915_MAX_WM, | |
946 | 1, | |
947 | 2, | |
948 | I830_FIFO_LINE_SIZE | |
949 | }; | |
950 | ||
951 | static const struct intel_watermark_params ironlake_display_wm_info = { | |
952 | ILK_DISPLAY_FIFO, | |
953 | ILK_DISPLAY_MAXWM, | |
954 | ILK_DISPLAY_DFTWM, | |
955 | 2, | |
956 | ILK_FIFO_LINE_SIZE | |
957 | }; | |
958 | static const struct intel_watermark_params ironlake_cursor_wm_info = { | |
959 | ILK_CURSOR_FIFO, | |
960 | ILK_CURSOR_MAXWM, | |
961 | ILK_CURSOR_DFTWM, | |
962 | 2, | |
963 | ILK_FIFO_LINE_SIZE | |
964 | }; | |
965 | static const struct intel_watermark_params ironlake_display_srwm_info = { | |
966 | ILK_DISPLAY_SR_FIFO, | |
967 | ILK_DISPLAY_MAX_SRWM, | |
968 | ILK_DISPLAY_DFT_SRWM, | |
969 | 2, | |
970 | ILK_FIFO_LINE_SIZE | |
971 | }; | |
972 | static const struct intel_watermark_params ironlake_cursor_srwm_info = { | |
973 | ILK_CURSOR_SR_FIFO, | |
974 | ILK_CURSOR_MAX_SRWM, | |
975 | ILK_CURSOR_DFT_SRWM, | |
976 | 2, | |
977 | ILK_FIFO_LINE_SIZE | |
978 | }; | |
979 | ||
980 | static const struct intel_watermark_params sandybridge_display_wm_info = { | |
981 | SNB_DISPLAY_FIFO, | |
982 | SNB_DISPLAY_MAXWM, | |
983 | SNB_DISPLAY_DFTWM, | |
984 | 2, | |
985 | SNB_FIFO_LINE_SIZE | |
986 | }; | |
987 | static const struct intel_watermark_params sandybridge_cursor_wm_info = { | |
988 | SNB_CURSOR_FIFO, | |
989 | SNB_CURSOR_MAXWM, | |
990 | SNB_CURSOR_DFTWM, | |
991 | 2, | |
992 | SNB_FIFO_LINE_SIZE | |
993 | }; | |
994 | static const struct intel_watermark_params sandybridge_display_srwm_info = { | |
995 | SNB_DISPLAY_SR_FIFO, | |
996 | SNB_DISPLAY_MAX_SRWM, | |
997 | SNB_DISPLAY_DFT_SRWM, | |
998 | 2, | |
999 | SNB_FIFO_LINE_SIZE | |
1000 | }; | |
1001 | static const struct intel_watermark_params sandybridge_cursor_srwm_info = { | |
1002 | SNB_CURSOR_SR_FIFO, | |
1003 | SNB_CURSOR_MAX_SRWM, | |
1004 | SNB_CURSOR_DFT_SRWM, | |
1005 | 2, | |
1006 | SNB_FIFO_LINE_SIZE | |
1007 | }; | |
1008 | ||
1009 | ||
1010 | /** | |
1011 | * intel_calculate_wm - calculate watermark level | |
1012 | * @clock_in_khz: pixel clock | |
1013 | * @wm: chip FIFO params | |
1014 | * @pixel_size: display pixel size | |
1015 | * @latency_ns: memory latency for the platform | |
1016 | * | |
1017 | * Calculate the watermark level (the level at which the display plane will | |
1018 | * start fetching from memory again). Each chip has a different display | |
1019 | * FIFO size and allocation, so the caller needs to figure that out and pass | |
1020 | * in the correct intel_watermark_params structure. | |
1021 | * | |
1022 | * As the pixel clock runs, the FIFO will be drained at a rate that depends | |
1023 | * on the pixel size. When it reaches the watermark level, it'll start | |
1024 | * fetching FIFO line sized based chunks from memory until the FIFO fills | |
1025 | * past the watermark point. If the FIFO drains completely, a FIFO underrun | |
1026 | * will occur, and a display engine hang could result. | |
1027 | */ | |
1028 | static unsigned long intel_calculate_wm(unsigned long clock_in_khz, | |
1029 | const struct intel_watermark_params *wm, | |
1030 | int fifo_size, | |
1031 | int pixel_size, | |
1032 | unsigned long latency_ns) | |
1033 | { | |
1034 | long entries_required, wm_size; | |
1035 | ||
1036 | /* | |
1037 | * Note: we need to make sure we don't overflow for various clock & | |
1038 | * latency values. | |
1039 | * clocks go from a few thousand to several hundred thousand. | |
1040 | * latency is usually a few thousand | |
1041 | */ | |
1042 | entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) / | |
1043 | 1000; | |
1044 | entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size); | |
1045 | ||
1046 | DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required); | |
1047 | ||
1048 | wm_size = fifo_size - (entries_required + wm->guard_size); | |
1049 | ||
1050 | DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size); | |
1051 | ||
1052 | /* Don't promote wm_size to unsigned... */ | |
1053 | if (wm_size > (long)wm->max_wm) | |
1054 | wm_size = wm->max_wm; | |
1055 | if (wm_size <= 0) | |
1056 | wm_size = wm->default_wm; | |
1057 | return wm_size; | |
1058 | } | |
1059 | ||
1060 | static struct drm_crtc *single_enabled_crtc(struct drm_device *dev) | |
1061 | { | |
1062 | struct drm_crtc *crtc, *enabled = NULL; | |
1063 | ||
1064 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
3490ea5d | 1065 | if (intel_crtc_active(crtc)) { |
b445e3b0 ED |
1066 | if (enabled) |
1067 | return NULL; | |
1068 | enabled = crtc; | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | return enabled; | |
1073 | } | |
1074 | ||
1fa61106 | 1075 | static void pineview_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1076 | { |
1077 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1078 | struct drm_crtc *crtc; | |
1079 | const struct cxsr_latency *latency; | |
1080 | u32 reg; | |
1081 | unsigned long wm; | |
1082 | ||
1083 | latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3, | |
1084 | dev_priv->fsb_freq, dev_priv->mem_freq); | |
1085 | if (!latency) { | |
1086 | DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); | |
1087 | pineview_disable_cxsr(dev); | |
1088 | return; | |
1089 | } | |
1090 | ||
1091 | crtc = single_enabled_crtc(dev); | |
1092 | if (crtc) { | |
1093 | int clock = crtc->mode.clock; | |
1094 | int pixel_size = crtc->fb->bits_per_pixel / 8; | |
1095 | ||
1096 | /* Display SR */ | |
1097 | wm = intel_calculate_wm(clock, &pineview_display_wm, | |
1098 | pineview_display_wm.fifo_size, | |
1099 | pixel_size, latency->display_sr); | |
1100 | reg = I915_READ(DSPFW1); | |
1101 | reg &= ~DSPFW_SR_MASK; | |
1102 | reg |= wm << DSPFW_SR_SHIFT; | |
1103 | I915_WRITE(DSPFW1, reg); | |
1104 | DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg); | |
1105 | ||
1106 | /* cursor SR */ | |
1107 | wm = intel_calculate_wm(clock, &pineview_cursor_wm, | |
1108 | pineview_display_wm.fifo_size, | |
1109 | pixel_size, latency->cursor_sr); | |
1110 | reg = I915_READ(DSPFW3); | |
1111 | reg &= ~DSPFW_CURSOR_SR_MASK; | |
1112 | reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT; | |
1113 | I915_WRITE(DSPFW3, reg); | |
1114 | ||
1115 | /* Display HPLL off SR */ | |
1116 | wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm, | |
1117 | pineview_display_hplloff_wm.fifo_size, | |
1118 | pixel_size, latency->display_hpll_disable); | |
1119 | reg = I915_READ(DSPFW3); | |
1120 | reg &= ~DSPFW_HPLL_SR_MASK; | |
1121 | reg |= wm & DSPFW_HPLL_SR_MASK; | |
1122 | I915_WRITE(DSPFW3, reg); | |
1123 | ||
1124 | /* cursor HPLL off SR */ | |
1125 | wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm, | |
1126 | pineview_display_hplloff_wm.fifo_size, | |
1127 | pixel_size, latency->cursor_hpll_disable); | |
1128 | reg = I915_READ(DSPFW3); | |
1129 | reg &= ~DSPFW_HPLL_CURSOR_MASK; | |
1130 | reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT; | |
1131 | I915_WRITE(DSPFW3, reg); | |
1132 | DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg); | |
1133 | ||
1134 | /* activate cxsr */ | |
1135 | I915_WRITE(DSPFW3, | |
1136 | I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN); | |
1137 | DRM_DEBUG_KMS("Self-refresh is enabled\n"); | |
1138 | } else { | |
1139 | pineview_disable_cxsr(dev); | |
1140 | DRM_DEBUG_KMS("Self-refresh is disabled\n"); | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | static bool g4x_compute_wm0(struct drm_device *dev, | |
1145 | int plane, | |
1146 | const struct intel_watermark_params *display, | |
1147 | int display_latency_ns, | |
1148 | const struct intel_watermark_params *cursor, | |
1149 | int cursor_latency_ns, | |
1150 | int *plane_wm, | |
1151 | int *cursor_wm) | |
1152 | { | |
1153 | struct drm_crtc *crtc; | |
1154 | int htotal, hdisplay, clock, pixel_size; | |
1155 | int line_time_us, line_count; | |
1156 | int entries, tlb_miss; | |
1157 | ||
1158 | crtc = intel_get_crtc_for_plane(dev, plane); | |
3490ea5d | 1159 | if (!intel_crtc_active(crtc)) { |
b445e3b0 ED |
1160 | *cursor_wm = cursor->guard_size; |
1161 | *plane_wm = display->guard_size; | |
1162 | return false; | |
1163 | } | |
1164 | ||
1165 | htotal = crtc->mode.htotal; | |
1166 | hdisplay = crtc->mode.hdisplay; | |
1167 | clock = crtc->mode.clock; | |
1168 | pixel_size = crtc->fb->bits_per_pixel / 8; | |
1169 | ||
1170 | /* Use the small buffer method to calculate plane watermark */ | |
1171 | entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; | |
1172 | tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8; | |
1173 | if (tlb_miss > 0) | |
1174 | entries += tlb_miss; | |
1175 | entries = DIV_ROUND_UP(entries, display->cacheline_size); | |
1176 | *plane_wm = entries + display->guard_size; | |
1177 | if (*plane_wm > (int)display->max_wm) | |
1178 | *plane_wm = display->max_wm; | |
1179 | ||
1180 | /* Use the large buffer method to calculate cursor watermark */ | |
1181 | line_time_us = ((htotal * 1000) / clock); | |
1182 | line_count = (cursor_latency_ns / line_time_us + 1000) / 1000; | |
1183 | entries = line_count * 64 * pixel_size; | |
1184 | tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8; | |
1185 | if (tlb_miss > 0) | |
1186 | entries += tlb_miss; | |
1187 | entries = DIV_ROUND_UP(entries, cursor->cacheline_size); | |
1188 | *cursor_wm = entries + cursor->guard_size; | |
1189 | if (*cursor_wm > (int)cursor->max_wm) | |
1190 | *cursor_wm = (int)cursor->max_wm; | |
1191 | ||
1192 | return true; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Check the wm result. | |
1197 | * | |
1198 | * If any calculated watermark values is larger than the maximum value that | |
1199 | * can be programmed into the associated watermark register, that watermark | |
1200 | * must be disabled. | |
1201 | */ | |
1202 | static bool g4x_check_srwm(struct drm_device *dev, | |
1203 | int display_wm, int cursor_wm, | |
1204 | const struct intel_watermark_params *display, | |
1205 | const struct intel_watermark_params *cursor) | |
1206 | { | |
1207 | DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n", | |
1208 | display_wm, cursor_wm); | |
1209 | ||
1210 | if (display_wm > display->max_wm) { | |
1211 | DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n", | |
1212 | display_wm, display->max_wm); | |
1213 | return false; | |
1214 | } | |
1215 | ||
1216 | if (cursor_wm > cursor->max_wm) { | |
1217 | DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n", | |
1218 | cursor_wm, cursor->max_wm); | |
1219 | return false; | |
1220 | } | |
1221 | ||
1222 | if (!(display_wm || cursor_wm)) { | |
1223 | DRM_DEBUG_KMS("SR latency is 0, disabling\n"); | |
1224 | return false; | |
1225 | } | |
1226 | ||
1227 | return true; | |
1228 | } | |
1229 | ||
1230 | static bool g4x_compute_srwm(struct drm_device *dev, | |
1231 | int plane, | |
1232 | int latency_ns, | |
1233 | const struct intel_watermark_params *display, | |
1234 | const struct intel_watermark_params *cursor, | |
1235 | int *display_wm, int *cursor_wm) | |
1236 | { | |
1237 | struct drm_crtc *crtc; | |
1238 | int hdisplay, htotal, pixel_size, clock; | |
1239 | unsigned long line_time_us; | |
1240 | int line_count, line_size; | |
1241 | int small, large; | |
1242 | int entries; | |
1243 | ||
1244 | if (!latency_ns) { | |
1245 | *display_wm = *cursor_wm = 0; | |
1246 | return false; | |
1247 | } | |
1248 | ||
1249 | crtc = intel_get_crtc_for_plane(dev, plane); | |
1250 | hdisplay = crtc->mode.hdisplay; | |
1251 | htotal = crtc->mode.htotal; | |
1252 | clock = crtc->mode.clock; | |
1253 | pixel_size = crtc->fb->bits_per_pixel / 8; | |
1254 | ||
1255 | line_time_us = (htotal * 1000) / clock; | |
1256 | line_count = (latency_ns / line_time_us + 1000) / 1000; | |
1257 | line_size = hdisplay * pixel_size; | |
1258 | ||
1259 | /* Use the minimum of the small and large buffer method for primary */ | |
1260 | small = ((clock * pixel_size / 1000) * latency_ns) / 1000; | |
1261 | large = line_count * line_size; | |
1262 | ||
1263 | entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); | |
1264 | *display_wm = entries + display->guard_size; | |
1265 | ||
1266 | /* calculate the self-refresh watermark for display cursor */ | |
1267 | entries = line_count * pixel_size * 64; | |
1268 | entries = DIV_ROUND_UP(entries, cursor->cacheline_size); | |
1269 | *cursor_wm = entries + cursor->guard_size; | |
1270 | ||
1271 | return g4x_check_srwm(dev, | |
1272 | *display_wm, *cursor_wm, | |
1273 | display, cursor); | |
1274 | } | |
1275 | ||
1276 | static bool vlv_compute_drain_latency(struct drm_device *dev, | |
1277 | int plane, | |
1278 | int *plane_prec_mult, | |
1279 | int *plane_dl, | |
1280 | int *cursor_prec_mult, | |
1281 | int *cursor_dl) | |
1282 | { | |
1283 | struct drm_crtc *crtc; | |
1284 | int clock, pixel_size; | |
1285 | int entries; | |
1286 | ||
1287 | crtc = intel_get_crtc_for_plane(dev, plane); | |
3490ea5d | 1288 | if (!intel_crtc_active(crtc)) |
b445e3b0 ED |
1289 | return false; |
1290 | ||
1291 | clock = crtc->mode.clock; /* VESA DOT Clock */ | |
1292 | pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */ | |
1293 | ||
1294 | entries = (clock / 1000) * pixel_size; | |
1295 | *plane_prec_mult = (entries > 256) ? | |
1296 | DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; | |
1297 | *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) * | |
1298 | pixel_size); | |
1299 | ||
1300 | entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */ | |
1301 | *cursor_prec_mult = (entries > 256) ? | |
1302 | DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; | |
1303 | *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4); | |
1304 | ||
1305 | return true; | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * Update drain latency registers of memory arbiter | |
1310 | * | |
1311 | * Valleyview SoC has a new memory arbiter and needs drain latency registers | |
1312 | * to be programmed. Each plane has a drain latency multiplier and a drain | |
1313 | * latency value. | |
1314 | */ | |
1315 | ||
1316 | static void vlv_update_drain_latency(struct drm_device *dev) | |
1317 | { | |
1318 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1319 | int planea_prec, planea_dl, planeb_prec, planeb_dl; | |
1320 | int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl; | |
1321 | int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is | |
1322 | either 16 or 32 */ | |
1323 | ||
1324 | /* For plane A, Cursor A */ | |
1325 | if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl, | |
1326 | &cursor_prec_mult, &cursora_dl)) { | |
1327 | cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1328 | DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16; | |
1329 | planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1330 | DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16; | |
1331 | ||
1332 | I915_WRITE(VLV_DDL1, cursora_prec | | |
1333 | (cursora_dl << DDL_CURSORA_SHIFT) | | |
1334 | planea_prec | planea_dl); | |
1335 | } | |
1336 | ||
1337 | /* For plane B, Cursor B */ | |
1338 | if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl, | |
1339 | &cursor_prec_mult, &cursorb_dl)) { | |
1340 | cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1341 | DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16; | |
1342 | planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1343 | DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16; | |
1344 | ||
1345 | I915_WRITE(VLV_DDL2, cursorb_prec | | |
1346 | (cursorb_dl << DDL_CURSORB_SHIFT) | | |
1347 | planeb_prec | planeb_dl); | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | #define single_plane_enabled(mask) is_power_of_2(mask) | |
1352 | ||
1fa61106 | 1353 | static void valleyview_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1354 | { |
1355 | static const int sr_latency_ns = 12000; | |
1356 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1357 | int planea_wm, planeb_wm, cursora_wm, cursorb_wm; | |
1358 | int plane_sr, cursor_sr; | |
af6c4575 | 1359 | int ignore_plane_sr, ignore_cursor_sr; |
b445e3b0 ED |
1360 | unsigned int enabled = 0; |
1361 | ||
1362 | vlv_update_drain_latency(dev); | |
1363 | ||
51cea1f4 | 1364 | if (g4x_compute_wm0(dev, PIPE_A, |
b445e3b0 ED |
1365 | &valleyview_wm_info, latency_ns, |
1366 | &valleyview_cursor_wm_info, latency_ns, | |
1367 | &planea_wm, &cursora_wm)) | |
51cea1f4 | 1368 | enabled |= 1 << PIPE_A; |
b445e3b0 | 1369 | |
51cea1f4 | 1370 | if (g4x_compute_wm0(dev, PIPE_B, |
b445e3b0 ED |
1371 | &valleyview_wm_info, latency_ns, |
1372 | &valleyview_cursor_wm_info, latency_ns, | |
1373 | &planeb_wm, &cursorb_wm)) | |
51cea1f4 | 1374 | enabled |= 1 << PIPE_B; |
b445e3b0 | 1375 | |
b445e3b0 ED |
1376 | if (single_plane_enabled(enabled) && |
1377 | g4x_compute_srwm(dev, ffs(enabled) - 1, | |
1378 | sr_latency_ns, | |
1379 | &valleyview_wm_info, | |
1380 | &valleyview_cursor_wm_info, | |
af6c4575 CW |
1381 | &plane_sr, &ignore_cursor_sr) && |
1382 | g4x_compute_srwm(dev, ffs(enabled) - 1, | |
1383 | 2*sr_latency_ns, | |
1384 | &valleyview_wm_info, | |
1385 | &valleyview_cursor_wm_info, | |
52bd02d8 | 1386 | &ignore_plane_sr, &cursor_sr)) { |
b445e3b0 | 1387 | I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN); |
52bd02d8 | 1388 | } else { |
b445e3b0 ED |
1389 | I915_WRITE(FW_BLC_SELF_VLV, |
1390 | I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN); | |
52bd02d8 CW |
1391 | plane_sr = cursor_sr = 0; |
1392 | } | |
b445e3b0 ED |
1393 | |
1394 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", | |
1395 | planea_wm, cursora_wm, | |
1396 | planeb_wm, cursorb_wm, | |
1397 | plane_sr, cursor_sr); | |
1398 | ||
1399 | I915_WRITE(DSPFW1, | |
1400 | (plane_sr << DSPFW_SR_SHIFT) | | |
1401 | (cursorb_wm << DSPFW_CURSORB_SHIFT) | | |
1402 | (planeb_wm << DSPFW_PLANEB_SHIFT) | | |
1403 | planea_wm); | |
1404 | I915_WRITE(DSPFW2, | |
8c919b28 | 1405 | (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | |
b445e3b0 ED |
1406 | (cursora_wm << DSPFW_CURSORA_SHIFT)); |
1407 | I915_WRITE(DSPFW3, | |
8c919b28 CW |
1408 | (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) | |
1409 | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); | |
b445e3b0 ED |
1410 | } |
1411 | ||
1fa61106 | 1412 | static void g4x_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1413 | { |
1414 | static const int sr_latency_ns = 12000; | |
1415 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1416 | int planea_wm, planeb_wm, cursora_wm, cursorb_wm; | |
1417 | int plane_sr, cursor_sr; | |
1418 | unsigned int enabled = 0; | |
1419 | ||
51cea1f4 | 1420 | if (g4x_compute_wm0(dev, PIPE_A, |
b445e3b0 ED |
1421 | &g4x_wm_info, latency_ns, |
1422 | &g4x_cursor_wm_info, latency_ns, | |
1423 | &planea_wm, &cursora_wm)) | |
51cea1f4 | 1424 | enabled |= 1 << PIPE_A; |
b445e3b0 | 1425 | |
51cea1f4 | 1426 | if (g4x_compute_wm0(dev, PIPE_B, |
b445e3b0 ED |
1427 | &g4x_wm_info, latency_ns, |
1428 | &g4x_cursor_wm_info, latency_ns, | |
1429 | &planeb_wm, &cursorb_wm)) | |
51cea1f4 | 1430 | enabled |= 1 << PIPE_B; |
b445e3b0 | 1431 | |
b445e3b0 ED |
1432 | if (single_plane_enabled(enabled) && |
1433 | g4x_compute_srwm(dev, ffs(enabled) - 1, | |
1434 | sr_latency_ns, | |
1435 | &g4x_wm_info, | |
1436 | &g4x_cursor_wm_info, | |
52bd02d8 | 1437 | &plane_sr, &cursor_sr)) { |
b445e3b0 | 1438 | I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); |
52bd02d8 | 1439 | } else { |
b445e3b0 ED |
1440 | I915_WRITE(FW_BLC_SELF, |
1441 | I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN); | |
52bd02d8 CW |
1442 | plane_sr = cursor_sr = 0; |
1443 | } | |
b445e3b0 ED |
1444 | |
1445 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", | |
1446 | planea_wm, cursora_wm, | |
1447 | planeb_wm, cursorb_wm, | |
1448 | plane_sr, cursor_sr); | |
1449 | ||
1450 | I915_WRITE(DSPFW1, | |
1451 | (plane_sr << DSPFW_SR_SHIFT) | | |
1452 | (cursorb_wm << DSPFW_CURSORB_SHIFT) | | |
1453 | (planeb_wm << DSPFW_PLANEB_SHIFT) | | |
1454 | planea_wm); | |
1455 | I915_WRITE(DSPFW2, | |
8c919b28 | 1456 | (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | |
b445e3b0 ED |
1457 | (cursora_wm << DSPFW_CURSORA_SHIFT)); |
1458 | /* HPLL off in SR has some issues on G4x... disable it */ | |
1459 | I915_WRITE(DSPFW3, | |
8c919b28 | 1460 | (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) | |
b445e3b0 ED |
1461 | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); |
1462 | } | |
1463 | ||
1fa61106 | 1464 | static void i965_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1465 | { |
1466 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1467 | struct drm_crtc *crtc; | |
1468 | int srwm = 1; | |
1469 | int cursor_sr = 16; | |
1470 | ||
1471 | /* Calc sr entries for one plane configs */ | |
1472 | crtc = single_enabled_crtc(dev); | |
1473 | if (crtc) { | |
1474 | /* self-refresh has much higher latency */ | |
1475 | static const int sr_latency_ns = 12000; | |
1476 | int clock = crtc->mode.clock; | |
1477 | int htotal = crtc->mode.htotal; | |
1478 | int hdisplay = crtc->mode.hdisplay; | |
1479 | int pixel_size = crtc->fb->bits_per_pixel / 8; | |
1480 | unsigned long line_time_us; | |
1481 | int entries; | |
1482 | ||
1483 | line_time_us = ((htotal * 1000) / clock); | |
1484 | ||
1485 | /* Use ns/us then divide to preserve precision */ | |
1486 | entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * | |
1487 | pixel_size * hdisplay; | |
1488 | entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); | |
1489 | srwm = I965_FIFO_SIZE - entries; | |
1490 | if (srwm < 0) | |
1491 | srwm = 1; | |
1492 | srwm &= 0x1ff; | |
1493 | DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n", | |
1494 | entries, srwm); | |
1495 | ||
1496 | entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * | |
1497 | pixel_size * 64; | |
1498 | entries = DIV_ROUND_UP(entries, | |
1499 | i965_cursor_wm_info.cacheline_size); | |
1500 | cursor_sr = i965_cursor_wm_info.fifo_size - | |
1501 | (entries + i965_cursor_wm_info.guard_size); | |
1502 | ||
1503 | if (cursor_sr > i965_cursor_wm_info.max_wm) | |
1504 | cursor_sr = i965_cursor_wm_info.max_wm; | |
1505 | ||
1506 | DRM_DEBUG_KMS("self-refresh watermark: display plane %d " | |
1507 | "cursor %d\n", srwm, cursor_sr); | |
1508 | ||
1509 | if (IS_CRESTLINE(dev)) | |
1510 | I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); | |
1511 | } else { | |
1512 | /* Turn off self refresh if both pipes are enabled */ | |
1513 | if (IS_CRESTLINE(dev)) | |
1514 | I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF) | |
1515 | & ~FW_BLC_SELF_EN); | |
1516 | } | |
1517 | ||
1518 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n", | |
1519 | srwm); | |
1520 | ||
1521 | /* 965 has limitations... */ | |
1522 | I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | | |
1523 | (8 << 16) | (8 << 8) | (8 << 0)); | |
1524 | I915_WRITE(DSPFW2, (8 << 8) | (8 << 0)); | |
1525 | /* update cursor SR watermark */ | |
1526 | I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); | |
1527 | } | |
1528 | ||
1fa61106 | 1529 | static void i9xx_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1530 | { |
1531 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1532 | const struct intel_watermark_params *wm_info; | |
1533 | uint32_t fwater_lo; | |
1534 | uint32_t fwater_hi; | |
1535 | int cwm, srwm = 1; | |
1536 | int fifo_size; | |
1537 | int planea_wm, planeb_wm; | |
1538 | struct drm_crtc *crtc, *enabled = NULL; | |
1539 | ||
1540 | if (IS_I945GM(dev)) | |
1541 | wm_info = &i945_wm_info; | |
1542 | else if (!IS_GEN2(dev)) | |
1543 | wm_info = &i915_wm_info; | |
1544 | else | |
1545 | wm_info = &i855_wm_info; | |
1546 | ||
1547 | fifo_size = dev_priv->display.get_fifo_size(dev, 0); | |
1548 | crtc = intel_get_crtc_for_plane(dev, 0); | |
3490ea5d | 1549 | if (intel_crtc_active(crtc)) { |
b9e0bda3 CW |
1550 | int cpp = crtc->fb->bits_per_pixel / 8; |
1551 | if (IS_GEN2(dev)) | |
1552 | cpp = 4; | |
1553 | ||
b445e3b0 | 1554 | planea_wm = intel_calculate_wm(crtc->mode.clock, |
b9e0bda3 | 1555 | wm_info, fifo_size, cpp, |
b445e3b0 ED |
1556 | latency_ns); |
1557 | enabled = crtc; | |
1558 | } else | |
1559 | planea_wm = fifo_size - wm_info->guard_size; | |
1560 | ||
1561 | fifo_size = dev_priv->display.get_fifo_size(dev, 1); | |
1562 | crtc = intel_get_crtc_for_plane(dev, 1); | |
3490ea5d | 1563 | if (intel_crtc_active(crtc)) { |
b9e0bda3 CW |
1564 | int cpp = crtc->fb->bits_per_pixel / 8; |
1565 | if (IS_GEN2(dev)) | |
1566 | cpp = 4; | |
1567 | ||
b445e3b0 | 1568 | planeb_wm = intel_calculate_wm(crtc->mode.clock, |
b9e0bda3 | 1569 | wm_info, fifo_size, cpp, |
b445e3b0 ED |
1570 | latency_ns); |
1571 | if (enabled == NULL) | |
1572 | enabled = crtc; | |
1573 | else | |
1574 | enabled = NULL; | |
1575 | } else | |
1576 | planeb_wm = fifo_size - wm_info->guard_size; | |
1577 | ||
1578 | DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm); | |
1579 | ||
1580 | /* | |
1581 | * Overlay gets an aggressive default since video jitter is bad. | |
1582 | */ | |
1583 | cwm = 2; | |
1584 | ||
1585 | /* Play safe and disable self-refresh before adjusting watermarks. */ | |
1586 | if (IS_I945G(dev) || IS_I945GM(dev)) | |
1587 | I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0); | |
1588 | else if (IS_I915GM(dev)) | |
1589 | I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN); | |
1590 | ||
1591 | /* Calc sr entries for one plane configs */ | |
1592 | if (HAS_FW_BLC(dev) && enabled) { | |
1593 | /* self-refresh has much higher latency */ | |
1594 | static const int sr_latency_ns = 6000; | |
1595 | int clock = enabled->mode.clock; | |
1596 | int htotal = enabled->mode.htotal; | |
1597 | int hdisplay = enabled->mode.hdisplay; | |
1598 | int pixel_size = enabled->fb->bits_per_pixel / 8; | |
1599 | unsigned long line_time_us; | |
1600 | int entries; | |
1601 | ||
1602 | line_time_us = (htotal * 1000) / clock; | |
1603 | ||
1604 | /* Use ns/us then divide to preserve precision */ | |
1605 | entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * | |
1606 | pixel_size * hdisplay; | |
1607 | entries = DIV_ROUND_UP(entries, wm_info->cacheline_size); | |
1608 | DRM_DEBUG_KMS("self-refresh entries: %d\n", entries); | |
1609 | srwm = wm_info->fifo_size - entries; | |
1610 | if (srwm < 0) | |
1611 | srwm = 1; | |
1612 | ||
1613 | if (IS_I945G(dev) || IS_I945GM(dev)) | |
1614 | I915_WRITE(FW_BLC_SELF, | |
1615 | FW_BLC_SELF_FIFO_MASK | (srwm & 0xff)); | |
1616 | else if (IS_I915GM(dev)) | |
1617 | I915_WRITE(FW_BLC_SELF, srwm & 0x3f); | |
1618 | } | |
1619 | ||
1620 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n", | |
1621 | planea_wm, planeb_wm, cwm, srwm); | |
1622 | ||
1623 | fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f); | |
1624 | fwater_hi = (cwm & 0x1f); | |
1625 | ||
1626 | /* Set request length to 8 cachelines per fetch */ | |
1627 | fwater_lo = fwater_lo | (1 << 24) | (1 << 8); | |
1628 | fwater_hi = fwater_hi | (1 << 8); | |
1629 | ||
1630 | I915_WRITE(FW_BLC, fwater_lo); | |
1631 | I915_WRITE(FW_BLC2, fwater_hi); | |
1632 | ||
1633 | if (HAS_FW_BLC(dev)) { | |
1634 | if (enabled) { | |
1635 | if (IS_I945G(dev) || IS_I945GM(dev)) | |
1636 | I915_WRITE(FW_BLC_SELF, | |
1637 | FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN); | |
1638 | else if (IS_I915GM(dev)) | |
1639 | I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN); | |
1640 | DRM_DEBUG_KMS("memory self refresh enabled\n"); | |
1641 | } else | |
1642 | DRM_DEBUG_KMS("memory self refresh disabled\n"); | |
1643 | } | |
1644 | } | |
1645 | ||
1fa61106 | 1646 | static void i830_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1647 | { |
1648 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1649 | struct drm_crtc *crtc; | |
1650 | uint32_t fwater_lo; | |
1651 | int planea_wm; | |
1652 | ||
1653 | crtc = single_enabled_crtc(dev); | |
1654 | if (crtc == NULL) | |
1655 | return; | |
1656 | ||
1657 | planea_wm = intel_calculate_wm(crtc->mode.clock, &i830_wm_info, | |
1658 | dev_priv->display.get_fifo_size(dev, 0), | |
b9e0bda3 | 1659 | 4, latency_ns); |
b445e3b0 ED |
1660 | fwater_lo = I915_READ(FW_BLC) & ~0xfff; |
1661 | fwater_lo |= (3<<8) | planea_wm; | |
1662 | ||
1663 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm); | |
1664 | ||
1665 | I915_WRITE(FW_BLC, fwater_lo); | |
1666 | } | |
1667 | ||
1668 | #define ILK_LP0_PLANE_LATENCY 700 | |
1669 | #define ILK_LP0_CURSOR_LATENCY 1300 | |
1670 | ||
1671 | /* | |
1672 | * Check the wm result. | |
1673 | * | |
1674 | * If any calculated watermark values is larger than the maximum value that | |
1675 | * can be programmed into the associated watermark register, that watermark | |
1676 | * must be disabled. | |
1677 | */ | |
1678 | static bool ironlake_check_srwm(struct drm_device *dev, int level, | |
1679 | int fbc_wm, int display_wm, int cursor_wm, | |
1680 | const struct intel_watermark_params *display, | |
1681 | const struct intel_watermark_params *cursor) | |
1682 | { | |
1683 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1684 | ||
1685 | DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d," | |
1686 | " cursor %d\n", level, display_wm, fbc_wm, cursor_wm); | |
1687 | ||
1688 | if (fbc_wm > SNB_FBC_MAX_SRWM) { | |
1689 | DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n", | |
1690 | fbc_wm, SNB_FBC_MAX_SRWM, level); | |
1691 | ||
1692 | /* fbc has it's own way to disable FBC WM */ | |
1693 | I915_WRITE(DISP_ARB_CTL, | |
1694 | I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS); | |
1695 | return false; | |
615aaa5f VS |
1696 | } else if (INTEL_INFO(dev)->gen >= 6) { |
1697 | /* enable FBC WM (except on ILK, where it must remain off) */ | |
1698 | I915_WRITE(DISP_ARB_CTL, | |
1699 | I915_READ(DISP_ARB_CTL) & ~DISP_FBC_WM_DIS); | |
b445e3b0 ED |
1700 | } |
1701 | ||
1702 | if (display_wm > display->max_wm) { | |
1703 | DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n", | |
1704 | display_wm, SNB_DISPLAY_MAX_SRWM, level); | |
1705 | return false; | |
1706 | } | |
1707 | ||
1708 | if (cursor_wm > cursor->max_wm) { | |
1709 | DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n", | |
1710 | cursor_wm, SNB_CURSOR_MAX_SRWM, level); | |
1711 | return false; | |
1712 | } | |
1713 | ||
1714 | if (!(fbc_wm || display_wm || cursor_wm)) { | |
1715 | DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level); | |
1716 | return false; | |
1717 | } | |
1718 | ||
1719 | return true; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * Compute watermark values of WM[1-3], | |
1724 | */ | |
1725 | static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane, | |
1726 | int latency_ns, | |
1727 | const struct intel_watermark_params *display, | |
1728 | const struct intel_watermark_params *cursor, | |
1729 | int *fbc_wm, int *display_wm, int *cursor_wm) | |
1730 | { | |
1731 | struct drm_crtc *crtc; | |
1732 | unsigned long line_time_us; | |
1733 | int hdisplay, htotal, pixel_size, clock; | |
1734 | int line_count, line_size; | |
1735 | int small, large; | |
1736 | int entries; | |
1737 | ||
1738 | if (!latency_ns) { | |
1739 | *fbc_wm = *display_wm = *cursor_wm = 0; | |
1740 | return false; | |
1741 | } | |
1742 | ||
1743 | crtc = intel_get_crtc_for_plane(dev, plane); | |
1744 | hdisplay = crtc->mode.hdisplay; | |
1745 | htotal = crtc->mode.htotal; | |
1746 | clock = crtc->mode.clock; | |
1747 | pixel_size = crtc->fb->bits_per_pixel / 8; | |
1748 | ||
1749 | line_time_us = (htotal * 1000) / clock; | |
1750 | line_count = (latency_ns / line_time_us + 1000) / 1000; | |
1751 | line_size = hdisplay * pixel_size; | |
1752 | ||
1753 | /* Use the minimum of the small and large buffer method for primary */ | |
1754 | small = ((clock * pixel_size / 1000) * latency_ns) / 1000; | |
1755 | large = line_count * line_size; | |
1756 | ||
1757 | entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); | |
1758 | *display_wm = entries + display->guard_size; | |
1759 | ||
1760 | /* | |
1761 | * Spec says: | |
1762 | * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2 | |
1763 | */ | |
1764 | *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2; | |
1765 | ||
1766 | /* calculate the self-refresh watermark for display cursor */ | |
1767 | entries = line_count * pixel_size * 64; | |
1768 | entries = DIV_ROUND_UP(entries, cursor->cacheline_size); | |
1769 | *cursor_wm = entries + cursor->guard_size; | |
1770 | ||
1771 | return ironlake_check_srwm(dev, level, | |
1772 | *fbc_wm, *display_wm, *cursor_wm, | |
1773 | display, cursor); | |
1774 | } | |
1775 | ||
1fa61106 | 1776 | static void ironlake_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1777 | { |
1778 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1779 | int fbc_wm, plane_wm, cursor_wm; | |
1780 | unsigned int enabled; | |
1781 | ||
1782 | enabled = 0; | |
51cea1f4 | 1783 | if (g4x_compute_wm0(dev, PIPE_A, |
b445e3b0 ED |
1784 | &ironlake_display_wm_info, |
1785 | ILK_LP0_PLANE_LATENCY, | |
1786 | &ironlake_cursor_wm_info, | |
1787 | ILK_LP0_CURSOR_LATENCY, | |
1788 | &plane_wm, &cursor_wm)) { | |
1789 | I915_WRITE(WM0_PIPEA_ILK, | |
1790 | (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm); | |
1791 | DRM_DEBUG_KMS("FIFO watermarks For pipe A -" | |
1792 | " plane %d, " "cursor: %d\n", | |
1793 | plane_wm, cursor_wm); | |
51cea1f4 | 1794 | enabled |= 1 << PIPE_A; |
b445e3b0 ED |
1795 | } |
1796 | ||
51cea1f4 | 1797 | if (g4x_compute_wm0(dev, PIPE_B, |
b445e3b0 ED |
1798 | &ironlake_display_wm_info, |
1799 | ILK_LP0_PLANE_LATENCY, | |
1800 | &ironlake_cursor_wm_info, | |
1801 | ILK_LP0_CURSOR_LATENCY, | |
1802 | &plane_wm, &cursor_wm)) { | |
1803 | I915_WRITE(WM0_PIPEB_ILK, | |
1804 | (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm); | |
1805 | DRM_DEBUG_KMS("FIFO watermarks For pipe B -" | |
1806 | " plane %d, cursor: %d\n", | |
1807 | plane_wm, cursor_wm); | |
51cea1f4 | 1808 | enabled |= 1 << PIPE_B; |
b445e3b0 ED |
1809 | } |
1810 | ||
1811 | /* | |
1812 | * Calculate and update the self-refresh watermark only when one | |
1813 | * display plane is used. | |
1814 | */ | |
1815 | I915_WRITE(WM3_LP_ILK, 0); | |
1816 | I915_WRITE(WM2_LP_ILK, 0); | |
1817 | I915_WRITE(WM1_LP_ILK, 0); | |
1818 | ||
1819 | if (!single_plane_enabled(enabled)) | |
1820 | return; | |
1821 | enabled = ffs(enabled) - 1; | |
1822 | ||
1823 | /* WM1 */ | |
1824 | if (!ironlake_compute_srwm(dev, 1, enabled, | |
1825 | ILK_READ_WM1_LATENCY() * 500, | |
1826 | &ironlake_display_srwm_info, | |
1827 | &ironlake_cursor_srwm_info, | |
1828 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1829 | return; | |
1830 | ||
1831 | I915_WRITE(WM1_LP_ILK, | |
1832 | WM1_LP_SR_EN | | |
1833 | (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1834 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1835 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1836 | cursor_wm); | |
1837 | ||
1838 | /* WM2 */ | |
1839 | if (!ironlake_compute_srwm(dev, 2, enabled, | |
1840 | ILK_READ_WM2_LATENCY() * 500, | |
1841 | &ironlake_display_srwm_info, | |
1842 | &ironlake_cursor_srwm_info, | |
1843 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1844 | return; | |
1845 | ||
1846 | I915_WRITE(WM2_LP_ILK, | |
1847 | WM2_LP_EN | | |
1848 | (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1849 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1850 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1851 | cursor_wm); | |
1852 | ||
1853 | /* | |
1854 | * WM3 is unsupported on ILK, probably because we don't have latency | |
1855 | * data for that power state | |
1856 | */ | |
1857 | } | |
1858 | ||
1fa61106 | 1859 | static void sandybridge_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1860 | { |
1861 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1862 | int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ | |
1863 | u32 val; | |
1864 | int fbc_wm, plane_wm, cursor_wm; | |
1865 | unsigned int enabled; | |
1866 | ||
1867 | enabled = 0; | |
51cea1f4 | 1868 | if (g4x_compute_wm0(dev, PIPE_A, |
b445e3b0 ED |
1869 | &sandybridge_display_wm_info, latency, |
1870 | &sandybridge_cursor_wm_info, latency, | |
1871 | &plane_wm, &cursor_wm)) { | |
1872 | val = I915_READ(WM0_PIPEA_ILK); | |
1873 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1874 | I915_WRITE(WM0_PIPEA_ILK, val | | |
1875 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1876 | DRM_DEBUG_KMS("FIFO watermarks For pipe A -" | |
1877 | " plane %d, " "cursor: %d\n", | |
1878 | plane_wm, cursor_wm); | |
51cea1f4 | 1879 | enabled |= 1 << PIPE_A; |
b445e3b0 ED |
1880 | } |
1881 | ||
51cea1f4 | 1882 | if (g4x_compute_wm0(dev, PIPE_B, |
b445e3b0 ED |
1883 | &sandybridge_display_wm_info, latency, |
1884 | &sandybridge_cursor_wm_info, latency, | |
1885 | &plane_wm, &cursor_wm)) { | |
1886 | val = I915_READ(WM0_PIPEB_ILK); | |
1887 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1888 | I915_WRITE(WM0_PIPEB_ILK, val | | |
1889 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1890 | DRM_DEBUG_KMS("FIFO watermarks For pipe B -" | |
1891 | " plane %d, cursor: %d\n", | |
1892 | plane_wm, cursor_wm); | |
51cea1f4 | 1893 | enabled |= 1 << PIPE_B; |
b445e3b0 ED |
1894 | } |
1895 | ||
c43d0188 CW |
1896 | /* |
1897 | * Calculate and update the self-refresh watermark only when one | |
1898 | * display plane is used. | |
1899 | * | |
1900 | * SNB support 3 levels of watermark. | |
1901 | * | |
1902 | * WM1/WM2/WM2 watermarks have to be enabled in the ascending order, | |
1903 | * and disabled in the descending order | |
1904 | * | |
1905 | */ | |
1906 | I915_WRITE(WM3_LP_ILK, 0); | |
1907 | I915_WRITE(WM2_LP_ILK, 0); | |
1908 | I915_WRITE(WM1_LP_ILK, 0); | |
1909 | ||
1910 | if (!single_plane_enabled(enabled) || | |
1911 | dev_priv->sprite_scaling_enabled) | |
1912 | return; | |
1913 | enabled = ffs(enabled) - 1; | |
1914 | ||
1915 | /* WM1 */ | |
1916 | if (!ironlake_compute_srwm(dev, 1, enabled, | |
1917 | SNB_READ_WM1_LATENCY() * 500, | |
1918 | &sandybridge_display_srwm_info, | |
1919 | &sandybridge_cursor_srwm_info, | |
1920 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1921 | return; | |
1922 | ||
1923 | I915_WRITE(WM1_LP_ILK, | |
1924 | WM1_LP_SR_EN | | |
1925 | (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1926 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1927 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1928 | cursor_wm); | |
1929 | ||
1930 | /* WM2 */ | |
1931 | if (!ironlake_compute_srwm(dev, 2, enabled, | |
1932 | SNB_READ_WM2_LATENCY() * 500, | |
1933 | &sandybridge_display_srwm_info, | |
1934 | &sandybridge_cursor_srwm_info, | |
1935 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1936 | return; | |
1937 | ||
1938 | I915_WRITE(WM2_LP_ILK, | |
1939 | WM2_LP_EN | | |
1940 | (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1941 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1942 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1943 | cursor_wm); | |
1944 | ||
1945 | /* WM3 */ | |
1946 | if (!ironlake_compute_srwm(dev, 3, enabled, | |
1947 | SNB_READ_WM3_LATENCY() * 500, | |
1948 | &sandybridge_display_srwm_info, | |
1949 | &sandybridge_cursor_srwm_info, | |
1950 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1951 | return; | |
1952 | ||
1953 | I915_WRITE(WM3_LP_ILK, | |
1954 | WM3_LP_EN | | |
1955 | (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1956 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1957 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1958 | cursor_wm); | |
1959 | } | |
1960 | ||
1961 | static void ivybridge_update_wm(struct drm_device *dev) | |
1962 | { | |
1963 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1964 | int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ | |
1965 | u32 val; | |
1966 | int fbc_wm, plane_wm, cursor_wm; | |
1967 | int ignore_fbc_wm, ignore_plane_wm, ignore_cursor_wm; | |
1968 | unsigned int enabled; | |
1969 | ||
1970 | enabled = 0; | |
51cea1f4 | 1971 | if (g4x_compute_wm0(dev, PIPE_A, |
c43d0188 CW |
1972 | &sandybridge_display_wm_info, latency, |
1973 | &sandybridge_cursor_wm_info, latency, | |
1974 | &plane_wm, &cursor_wm)) { | |
1975 | val = I915_READ(WM0_PIPEA_ILK); | |
1976 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1977 | I915_WRITE(WM0_PIPEA_ILK, val | | |
1978 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1979 | DRM_DEBUG_KMS("FIFO watermarks For pipe A -" | |
1980 | " plane %d, " "cursor: %d\n", | |
1981 | plane_wm, cursor_wm); | |
51cea1f4 | 1982 | enabled |= 1 << PIPE_A; |
c43d0188 CW |
1983 | } |
1984 | ||
51cea1f4 | 1985 | if (g4x_compute_wm0(dev, PIPE_B, |
c43d0188 CW |
1986 | &sandybridge_display_wm_info, latency, |
1987 | &sandybridge_cursor_wm_info, latency, | |
1988 | &plane_wm, &cursor_wm)) { | |
1989 | val = I915_READ(WM0_PIPEB_ILK); | |
1990 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1991 | I915_WRITE(WM0_PIPEB_ILK, val | | |
1992 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1993 | DRM_DEBUG_KMS("FIFO watermarks For pipe B -" | |
1994 | " plane %d, cursor: %d\n", | |
1995 | plane_wm, cursor_wm); | |
51cea1f4 | 1996 | enabled |= 1 << PIPE_B; |
c43d0188 CW |
1997 | } |
1998 | ||
51cea1f4 | 1999 | if (g4x_compute_wm0(dev, PIPE_C, |
b445e3b0 ED |
2000 | &sandybridge_display_wm_info, latency, |
2001 | &sandybridge_cursor_wm_info, latency, | |
2002 | &plane_wm, &cursor_wm)) { | |
2003 | val = I915_READ(WM0_PIPEC_IVB); | |
2004 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
2005 | I915_WRITE(WM0_PIPEC_IVB, val | | |
2006 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
2007 | DRM_DEBUG_KMS("FIFO watermarks For pipe C -" | |
2008 | " plane %d, cursor: %d\n", | |
2009 | plane_wm, cursor_wm); | |
51cea1f4 | 2010 | enabled |= 1 << PIPE_C; |
b445e3b0 ED |
2011 | } |
2012 | ||
2013 | /* | |
2014 | * Calculate and update the self-refresh watermark only when one | |
2015 | * display plane is used. | |
2016 | * | |
2017 | * SNB support 3 levels of watermark. | |
2018 | * | |
2019 | * WM1/WM2/WM2 watermarks have to be enabled in the ascending order, | |
2020 | * and disabled in the descending order | |
2021 | * | |
2022 | */ | |
2023 | I915_WRITE(WM3_LP_ILK, 0); | |
2024 | I915_WRITE(WM2_LP_ILK, 0); | |
2025 | I915_WRITE(WM1_LP_ILK, 0); | |
2026 | ||
2027 | if (!single_plane_enabled(enabled) || | |
2028 | dev_priv->sprite_scaling_enabled) | |
2029 | return; | |
2030 | enabled = ffs(enabled) - 1; | |
2031 | ||
2032 | /* WM1 */ | |
2033 | if (!ironlake_compute_srwm(dev, 1, enabled, | |
2034 | SNB_READ_WM1_LATENCY() * 500, | |
2035 | &sandybridge_display_srwm_info, | |
2036 | &sandybridge_cursor_srwm_info, | |
2037 | &fbc_wm, &plane_wm, &cursor_wm)) | |
2038 | return; | |
2039 | ||
2040 | I915_WRITE(WM1_LP_ILK, | |
2041 | WM1_LP_SR_EN | | |
2042 | (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
2043 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
2044 | (plane_wm << WM1_LP_SR_SHIFT) | | |
2045 | cursor_wm); | |
2046 | ||
2047 | /* WM2 */ | |
2048 | if (!ironlake_compute_srwm(dev, 2, enabled, | |
2049 | SNB_READ_WM2_LATENCY() * 500, | |
2050 | &sandybridge_display_srwm_info, | |
2051 | &sandybridge_cursor_srwm_info, | |
2052 | &fbc_wm, &plane_wm, &cursor_wm)) | |
2053 | return; | |
2054 | ||
2055 | I915_WRITE(WM2_LP_ILK, | |
2056 | WM2_LP_EN | | |
2057 | (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
2058 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
2059 | (plane_wm << WM1_LP_SR_SHIFT) | | |
2060 | cursor_wm); | |
2061 | ||
c43d0188 | 2062 | /* WM3, note we have to correct the cursor latency */ |
b445e3b0 ED |
2063 | if (!ironlake_compute_srwm(dev, 3, enabled, |
2064 | SNB_READ_WM3_LATENCY() * 500, | |
2065 | &sandybridge_display_srwm_info, | |
2066 | &sandybridge_cursor_srwm_info, | |
c43d0188 CW |
2067 | &fbc_wm, &plane_wm, &ignore_cursor_wm) || |
2068 | !ironlake_compute_srwm(dev, 3, enabled, | |
2069 | 2 * SNB_READ_WM3_LATENCY() * 500, | |
2070 | &sandybridge_display_srwm_info, | |
2071 | &sandybridge_cursor_srwm_info, | |
2072 | &ignore_fbc_wm, &ignore_plane_wm, &cursor_wm)) | |
b445e3b0 ED |
2073 | return; |
2074 | ||
2075 | I915_WRITE(WM3_LP_ILK, | |
2076 | WM3_LP_EN | | |
2077 | (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
2078 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
2079 | (plane_wm << WM1_LP_SR_SHIFT) | | |
2080 | cursor_wm); | |
2081 | } | |
2082 | ||
801bcfff PZ |
2083 | static uint32_t hsw_wm_get_pixel_rate(struct drm_device *dev, |
2084 | struct drm_crtc *crtc) | |
2085 | { | |
2086 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
2087 | uint32_t pixel_rate, pfit_size; | |
2088 | ||
ff9a6750 | 2089 | pixel_rate = intel_crtc->config.adjusted_mode.clock; |
801bcfff PZ |
2090 | |
2091 | /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to | |
2092 | * adjust the pixel_rate here. */ | |
2093 | ||
2094 | pfit_size = intel_crtc->config.pch_pfit.size; | |
2095 | if (pfit_size) { | |
2096 | uint64_t pipe_w, pipe_h, pfit_w, pfit_h; | |
2097 | ||
2098 | pipe_w = intel_crtc->config.requested_mode.hdisplay; | |
2099 | pipe_h = intel_crtc->config.requested_mode.vdisplay; | |
2100 | pfit_w = (pfit_size >> 16) & 0xFFFF; | |
2101 | pfit_h = pfit_size & 0xFFFF; | |
2102 | if (pipe_w < pfit_w) | |
2103 | pipe_w = pfit_w; | |
2104 | if (pipe_h < pfit_h) | |
2105 | pipe_h = pfit_h; | |
2106 | ||
2107 | pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h, | |
2108 | pfit_w * pfit_h); | |
2109 | } | |
2110 | ||
2111 | return pixel_rate; | |
2112 | } | |
2113 | ||
2114 | static uint32_t hsw_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel, | |
2115 | uint32_t latency) | |
2116 | { | |
2117 | uint64_t ret; | |
2118 | ||
2119 | ret = (uint64_t) pixel_rate * bytes_per_pixel * latency; | |
2120 | ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2; | |
2121 | ||
2122 | return ret; | |
2123 | } | |
2124 | ||
2125 | static uint32_t hsw_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal, | |
2126 | uint32_t horiz_pixels, uint8_t bytes_per_pixel, | |
2127 | uint32_t latency) | |
2128 | { | |
2129 | uint32_t ret; | |
2130 | ||
2131 | ret = (latency * pixel_rate) / (pipe_htotal * 10000); | |
2132 | ret = (ret + 1) * horiz_pixels * bytes_per_pixel; | |
2133 | ret = DIV_ROUND_UP(ret, 64) + 2; | |
2134 | return ret; | |
2135 | } | |
2136 | ||
cca32e9a PZ |
2137 | static uint32_t hsw_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels, |
2138 | uint8_t bytes_per_pixel) | |
2139 | { | |
2140 | return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2; | |
2141 | } | |
2142 | ||
801bcfff PZ |
2143 | struct hsw_pipe_wm_parameters { |
2144 | bool active; | |
2145 | bool sprite_enabled; | |
2146 | uint8_t pri_bytes_per_pixel; | |
2147 | uint8_t spr_bytes_per_pixel; | |
2148 | uint8_t cur_bytes_per_pixel; | |
2149 | uint32_t pri_horiz_pixels; | |
2150 | uint32_t spr_horiz_pixels; | |
2151 | uint32_t cur_horiz_pixels; | |
2152 | uint32_t pipe_htotal; | |
2153 | uint32_t pixel_rate; | |
2154 | }; | |
2155 | ||
cca32e9a PZ |
2156 | struct hsw_wm_maximums { |
2157 | uint16_t pri; | |
2158 | uint16_t spr; | |
2159 | uint16_t cur; | |
2160 | uint16_t fbc; | |
2161 | }; | |
2162 | ||
2163 | struct hsw_lp_wm_result { | |
2164 | bool enable; | |
2165 | bool fbc_enable; | |
2166 | uint32_t pri_val; | |
2167 | uint32_t spr_val; | |
2168 | uint32_t cur_val; | |
2169 | uint32_t fbc_val; | |
2170 | }; | |
2171 | ||
801bcfff PZ |
2172 | struct hsw_wm_values { |
2173 | uint32_t wm_pipe[3]; | |
2174 | uint32_t wm_lp[3]; | |
2175 | uint32_t wm_lp_spr[3]; | |
2176 | uint32_t wm_linetime[3]; | |
cca32e9a | 2177 | bool enable_fbc_wm; |
801bcfff PZ |
2178 | }; |
2179 | ||
2180 | enum hsw_data_buf_partitioning { | |
2181 | HSW_DATA_BUF_PART_1_2, | |
2182 | HSW_DATA_BUF_PART_5_6, | |
2183 | }; | |
2184 | ||
cca32e9a PZ |
2185 | /* For both WM_PIPE and WM_LP. */ |
2186 | static uint32_t hsw_compute_pri_wm(struct hsw_pipe_wm_parameters *params, | |
2187 | uint32_t mem_value, | |
2188 | bool is_lp) | |
801bcfff | 2189 | { |
cca32e9a PZ |
2190 | uint32_t method1, method2; |
2191 | ||
801bcfff PZ |
2192 | /* TODO: for now, assume the primary plane is always enabled. */ |
2193 | if (!params->active) | |
2194 | return 0; | |
2195 | ||
cca32e9a PZ |
2196 | method1 = hsw_wm_method1(params->pixel_rate, |
2197 | params->pri_bytes_per_pixel, | |
2198 | mem_value); | |
2199 | ||
2200 | if (!is_lp) | |
2201 | return method1; | |
2202 | ||
2203 | method2 = hsw_wm_method2(params->pixel_rate, | |
2204 | params->pipe_htotal, | |
2205 | params->pri_horiz_pixels, | |
2206 | params->pri_bytes_per_pixel, | |
2207 | mem_value); | |
2208 | ||
2209 | return min(method1, method2); | |
801bcfff PZ |
2210 | } |
2211 | ||
2212 | /* For both WM_PIPE and WM_LP. */ | |
2213 | static uint32_t hsw_compute_spr_wm(struct hsw_pipe_wm_parameters *params, | |
2214 | uint32_t mem_value) | |
2215 | { | |
2216 | uint32_t method1, method2; | |
2217 | ||
2218 | if (!params->active || !params->sprite_enabled) | |
2219 | return 0; | |
2220 | ||
2221 | method1 = hsw_wm_method1(params->pixel_rate, | |
2222 | params->spr_bytes_per_pixel, | |
2223 | mem_value); | |
2224 | method2 = hsw_wm_method2(params->pixel_rate, | |
2225 | params->pipe_htotal, | |
2226 | params->spr_horiz_pixels, | |
2227 | params->spr_bytes_per_pixel, | |
2228 | mem_value); | |
2229 | return min(method1, method2); | |
2230 | } | |
2231 | ||
2232 | /* For both WM_PIPE and WM_LP. */ | |
2233 | static uint32_t hsw_compute_cur_wm(struct hsw_pipe_wm_parameters *params, | |
2234 | uint32_t mem_value) | |
2235 | { | |
2236 | if (!params->active) | |
2237 | return 0; | |
2238 | ||
2239 | return hsw_wm_method2(params->pixel_rate, | |
2240 | params->pipe_htotal, | |
2241 | params->cur_horiz_pixels, | |
2242 | params->cur_bytes_per_pixel, | |
2243 | mem_value); | |
2244 | } | |
2245 | ||
cca32e9a PZ |
2246 | /* Only for WM_LP. */ |
2247 | static uint32_t hsw_compute_fbc_wm(struct hsw_pipe_wm_parameters *params, | |
2248 | uint32_t pri_val, | |
2249 | uint32_t mem_value) | |
2250 | { | |
2251 | if (!params->active) | |
2252 | return 0; | |
2253 | ||
2254 | return hsw_wm_fbc(pri_val, | |
2255 | params->pri_horiz_pixels, | |
2256 | params->pri_bytes_per_pixel); | |
2257 | } | |
2258 | ||
2259 | static bool hsw_compute_lp_wm(uint32_t mem_value, struct hsw_wm_maximums *max, | |
2260 | struct hsw_pipe_wm_parameters *params, | |
2261 | struct hsw_lp_wm_result *result) | |
2262 | { | |
2263 | enum pipe pipe; | |
2264 | uint32_t pri_val[3], spr_val[3], cur_val[3], fbc_val[3]; | |
2265 | ||
2266 | for (pipe = PIPE_A; pipe <= PIPE_C; pipe++) { | |
2267 | struct hsw_pipe_wm_parameters *p = ¶ms[pipe]; | |
2268 | ||
2269 | pri_val[pipe] = hsw_compute_pri_wm(p, mem_value, true); | |
2270 | spr_val[pipe] = hsw_compute_spr_wm(p, mem_value); | |
2271 | cur_val[pipe] = hsw_compute_cur_wm(p, mem_value); | |
2272 | fbc_val[pipe] = hsw_compute_fbc_wm(p, pri_val[pipe], mem_value); | |
2273 | } | |
2274 | ||
2275 | result->pri_val = max3(pri_val[0], pri_val[1], pri_val[2]); | |
2276 | result->spr_val = max3(spr_val[0], spr_val[1], spr_val[2]); | |
2277 | result->cur_val = max3(cur_val[0], cur_val[1], cur_val[2]); | |
2278 | result->fbc_val = max3(fbc_val[0], fbc_val[1], fbc_val[2]); | |
2279 | ||
2280 | if (result->fbc_val > max->fbc) { | |
2281 | result->fbc_enable = false; | |
2282 | result->fbc_val = 0; | |
2283 | } else { | |
2284 | result->fbc_enable = true; | |
2285 | } | |
2286 | ||
2287 | result->enable = result->pri_val <= max->pri && | |
2288 | result->spr_val <= max->spr && | |
2289 | result->cur_val <= max->cur; | |
2290 | return result->enable; | |
2291 | } | |
2292 | ||
801bcfff PZ |
2293 | static uint32_t hsw_compute_wm_pipe(struct drm_i915_private *dev_priv, |
2294 | uint32_t mem_value, enum pipe pipe, | |
2295 | struct hsw_pipe_wm_parameters *params) | |
2296 | { | |
2297 | uint32_t pri_val, cur_val, spr_val; | |
2298 | ||
cca32e9a | 2299 | pri_val = hsw_compute_pri_wm(params, mem_value, false); |
801bcfff PZ |
2300 | spr_val = hsw_compute_spr_wm(params, mem_value); |
2301 | cur_val = hsw_compute_cur_wm(params, mem_value); | |
2302 | ||
2303 | WARN(pri_val > 127, | |
2304 | "Primary WM error, mode not supported for pipe %c\n", | |
2305 | pipe_name(pipe)); | |
2306 | WARN(spr_val > 127, | |
2307 | "Sprite WM error, mode not supported for pipe %c\n", | |
2308 | pipe_name(pipe)); | |
2309 | WARN(cur_val > 63, | |
2310 | "Cursor WM error, mode not supported for pipe %c\n", | |
2311 | pipe_name(pipe)); | |
2312 | ||
2313 | return (pri_val << WM0_PIPE_PLANE_SHIFT) | | |
2314 | (spr_val << WM0_PIPE_SPRITE_SHIFT) | | |
2315 | cur_val; | |
2316 | } | |
2317 | ||
2318 | static uint32_t | |
2319 | hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc) | |
1f8eeabf ED |
2320 | { |
2321 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1011d8c4 | 2322 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
1011d8c4 | 2323 | struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode; |
85a02deb | 2324 | u32 linetime, ips_linetime; |
1f8eeabf | 2325 | |
801bcfff PZ |
2326 | if (!intel_crtc_active(crtc)) |
2327 | return 0; | |
1011d8c4 | 2328 | |
1f8eeabf ED |
2329 | /* The WM are computed with base on how long it takes to fill a single |
2330 | * row at the given clock rate, multiplied by 8. | |
2331 | * */ | |
85a02deb PZ |
2332 | linetime = DIV_ROUND_CLOSEST(mode->htotal * 1000 * 8, mode->clock); |
2333 | ips_linetime = DIV_ROUND_CLOSEST(mode->htotal * 1000 * 8, | |
2334 | intel_ddi_get_cdclk_freq(dev_priv)); | |
1f8eeabf | 2335 | |
801bcfff PZ |
2336 | return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) | |
2337 | PIPE_WM_LINETIME_TIME(linetime); | |
1f8eeabf ED |
2338 | } |
2339 | ||
801bcfff PZ |
2340 | static void hsw_compute_wm_parameters(struct drm_device *dev, |
2341 | struct hsw_pipe_wm_parameters *params, | |
cca32e9a | 2342 | uint32_t *wm, |
861f3389 PZ |
2343 | struct hsw_wm_maximums *lp_max_1_2, |
2344 | struct hsw_wm_maximums *lp_max_5_6) | |
1011d8c4 PZ |
2345 | { |
2346 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2347 | struct drm_crtc *crtc; | |
801bcfff PZ |
2348 | struct drm_plane *plane; |
2349 | uint64_t sskpd = I915_READ64(MCH_SSKPD); | |
1011d8c4 | 2350 | enum pipe pipe; |
cca32e9a | 2351 | int pipes_active = 0, sprites_enabled = 0; |
1011d8c4 | 2352 | |
801bcfff PZ |
2353 | if ((sskpd >> 56) & 0xFF) |
2354 | wm[0] = (sskpd >> 56) & 0xFF; | |
2355 | else | |
2356 | wm[0] = sskpd & 0xF; | |
2357 | wm[1] = ((sskpd >> 4) & 0xFF) * 5; | |
2358 | wm[2] = ((sskpd >> 12) & 0xFF) * 5; | |
2359 | wm[3] = ((sskpd >> 20) & 0x1FF) * 5; | |
2360 | wm[4] = ((sskpd >> 32) & 0x1FF) * 5; | |
2361 | ||
2362 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
2363 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
2364 | struct hsw_pipe_wm_parameters *p; | |
2365 | ||
2366 | pipe = intel_crtc->pipe; | |
2367 | p = ¶ms[pipe]; | |
2368 | ||
2369 | p->active = intel_crtc_active(crtc); | |
2370 | if (!p->active) | |
2371 | continue; | |
2372 | ||
cca32e9a PZ |
2373 | pipes_active++; |
2374 | ||
801bcfff PZ |
2375 | p->pipe_htotal = intel_crtc->config.adjusted_mode.htotal; |
2376 | p->pixel_rate = hsw_wm_get_pixel_rate(dev, crtc); | |
2377 | p->pri_bytes_per_pixel = crtc->fb->bits_per_pixel / 8; | |
2378 | p->cur_bytes_per_pixel = 4; | |
2379 | p->pri_horiz_pixels = | |
2380 | intel_crtc->config.requested_mode.hdisplay; | |
2381 | p->cur_horiz_pixels = 64; | |
2382 | } | |
2383 | ||
2384 | list_for_each_entry(plane, &dev->mode_config.plane_list, head) { | |
2385 | struct intel_plane *intel_plane = to_intel_plane(plane); | |
2386 | struct hsw_pipe_wm_parameters *p; | |
2387 | ||
2388 | pipe = intel_plane->pipe; | |
2389 | p = ¶ms[pipe]; | |
2390 | ||
2391 | p->sprite_enabled = intel_plane->wm.enable; | |
2392 | p->spr_bytes_per_pixel = intel_plane->wm.bytes_per_pixel; | |
2393 | p->spr_horiz_pixels = intel_plane->wm.horiz_pixels; | |
cca32e9a PZ |
2394 | |
2395 | if (p->sprite_enabled) | |
2396 | sprites_enabled++; | |
2397 | } | |
2398 | ||
2399 | if (pipes_active > 1) { | |
861f3389 PZ |
2400 | lp_max_1_2->pri = lp_max_5_6->pri = sprites_enabled ? 128 : 256; |
2401 | lp_max_1_2->spr = lp_max_5_6->spr = 128; | |
2402 | lp_max_1_2->cur = lp_max_5_6->cur = 64; | |
cca32e9a PZ |
2403 | } else { |
2404 | lp_max_1_2->pri = sprites_enabled ? 384 : 768; | |
861f3389 | 2405 | lp_max_5_6->pri = sprites_enabled ? 128 : 768; |
cca32e9a | 2406 | lp_max_1_2->spr = 384; |
861f3389 PZ |
2407 | lp_max_5_6->spr = 640; |
2408 | lp_max_1_2->cur = lp_max_5_6->cur = 255; | |
801bcfff | 2409 | } |
861f3389 | 2410 | lp_max_1_2->fbc = lp_max_5_6->fbc = 15; |
801bcfff PZ |
2411 | } |
2412 | ||
2413 | static void hsw_compute_wm_results(struct drm_device *dev, | |
2414 | struct hsw_pipe_wm_parameters *params, | |
2415 | uint32_t *wm, | |
cca32e9a | 2416 | struct hsw_wm_maximums *lp_maximums, |
801bcfff PZ |
2417 | struct hsw_wm_values *results) |
2418 | { | |
2419 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2420 | struct drm_crtc *crtc; | |
cca32e9a | 2421 | struct hsw_lp_wm_result lp_results[4] = {}; |
801bcfff | 2422 | enum pipe pipe; |
cca32e9a PZ |
2423 | int level, max_level, wm_lp; |
2424 | ||
2425 | for (level = 1; level <= 4; level++) | |
2426 | if (!hsw_compute_lp_wm(wm[level], lp_maximums, params, | |
2427 | &lp_results[level - 1])) | |
2428 | break; | |
2429 | max_level = level - 1; | |
2430 | ||
2431 | /* The spec says it is preferred to disable FBC WMs instead of disabling | |
2432 | * a WM level. */ | |
2433 | results->enable_fbc_wm = true; | |
2434 | for (level = 1; level <= max_level; level++) { | |
2435 | if (!lp_results[level - 1].fbc_enable) { | |
2436 | results->enable_fbc_wm = false; | |
2437 | break; | |
2438 | } | |
2439 | } | |
2440 | ||
2441 | memset(results, 0, sizeof(*results)); | |
2442 | for (wm_lp = 1; wm_lp <= 3; wm_lp++) { | |
2443 | const struct hsw_lp_wm_result *r; | |
801bcfff | 2444 | |
cca32e9a PZ |
2445 | level = (max_level == 4 && wm_lp > 1) ? wm_lp + 1 : wm_lp; |
2446 | if (level > max_level) | |
2447 | break; | |
2448 | ||
2449 | r = &lp_results[level - 1]; | |
2450 | results->wm_lp[wm_lp - 1] = HSW_WM_LP_VAL(level * 2, | |
2451 | r->fbc_val, | |
2452 | r->pri_val, | |
2453 | r->cur_val); | |
2454 | results->wm_lp_spr[wm_lp - 1] = r->spr_val; | |
2455 | } | |
801bcfff PZ |
2456 | |
2457 | for_each_pipe(pipe) | |
2458 | results->wm_pipe[pipe] = hsw_compute_wm_pipe(dev_priv, wm[0], | |
2459 | pipe, | |
2460 | ¶ms[pipe]); | |
1011d8c4 PZ |
2461 | |
2462 | for_each_pipe(pipe) { | |
2463 | crtc = dev_priv->pipe_to_crtc_mapping[pipe]; | |
801bcfff PZ |
2464 | results->wm_linetime[pipe] = hsw_compute_linetime_wm(dev, crtc); |
2465 | } | |
2466 | } | |
2467 | ||
861f3389 PZ |
2468 | /* Find the result with the highest level enabled. Check for enable_fbc_wm in |
2469 | * case both are at the same level. Prefer r1 in case they're the same. */ | |
2470 | struct hsw_wm_values *hsw_find_best_result(struct hsw_wm_values *r1, | |
2471 | struct hsw_wm_values *r2) | |
2472 | { | |
2473 | int i, val_r1 = 0, val_r2 = 0; | |
2474 | ||
2475 | for (i = 0; i < 3; i++) { | |
2476 | if (r1->wm_lp[i] & WM3_LP_EN) | |
2477 | val_r1 = r1->wm_lp[i] & WM1_LP_LATENCY_MASK; | |
2478 | if (r2->wm_lp[i] & WM3_LP_EN) | |
2479 | val_r2 = r2->wm_lp[i] & WM1_LP_LATENCY_MASK; | |
2480 | } | |
2481 | ||
2482 | if (val_r1 == val_r2) { | |
2483 | if (r2->enable_fbc_wm && !r1->enable_fbc_wm) | |
2484 | return r2; | |
2485 | else | |
2486 | return r1; | |
2487 | } else if (val_r1 > val_r2) { | |
2488 | return r1; | |
2489 | } else { | |
2490 | return r2; | |
2491 | } | |
2492 | } | |
2493 | ||
801bcfff PZ |
2494 | /* |
2495 | * The spec says we shouldn't write when we don't need, because every write | |
2496 | * causes WMs to be re-evaluated, expending some power. | |
2497 | */ | |
2498 | static void hsw_write_wm_values(struct drm_i915_private *dev_priv, | |
2499 | struct hsw_wm_values *results, | |
2500 | enum hsw_data_buf_partitioning partitioning) | |
2501 | { | |
2502 | struct hsw_wm_values previous; | |
2503 | uint32_t val; | |
2504 | enum hsw_data_buf_partitioning prev_partitioning; | |
cca32e9a | 2505 | bool prev_enable_fbc_wm; |
801bcfff PZ |
2506 | |
2507 | previous.wm_pipe[0] = I915_READ(WM0_PIPEA_ILK); | |
2508 | previous.wm_pipe[1] = I915_READ(WM0_PIPEB_ILK); | |
2509 | previous.wm_pipe[2] = I915_READ(WM0_PIPEC_IVB); | |
2510 | previous.wm_lp[0] = I915_READ(WM1_LP_ILK); | |
2511 | previous.wm_lp[1] = I915_READ(WM2_LP_ILK); | |
2512 | previous.wm_lp[2] = I915_READ(WM3_LP_ILK); | |
2513 | previous.wm_lp_spr[0] = I915_READ(WM1S_LP_ILK); | |
2514 | previous.wm_lp_spr[1] = I915_READ(WM2S_LP_IVB); | |
2515 | previous.wm_lp_spr[2] = I915_READ(WM3S_LP_IVB); | |
2516 | previous.wm_linetime[0] = I915_READ(PIPE_WM_LINETIME(PIPE_A)); | |
2517 | previous.wm_linetime[1] = I915_READ(PIPE_WM_LINETIME(PIPE_B)); | |
2518 | previous.wm_linetime[2] = I915_READ(PIPE_WM_LINETIME(PIPE_C)); | |
2519 | ||
2520 | prev_partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ? | |
2521 | HSW_DATA_BUF_PART_5_6 : HSW_DATA_BUF_PART_1_2; | |
2522 | ||
cca32e9a PZ |
2523 | prev_enable_fbc_wm = !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS); |
2524 | ||
801bcfff PZ |
2525 | if (memcmp(results->wm_pipe, previous.wm_pipe, |
2526 | sizeof(results->wm_pipe)) == 0 && | |
2527 | memcmp(results->wm_lp, previous.wm_lp, | |
2528 | sizeof(results->wm_lp)) == 0 && | |
2529 | memcmp(results->wm_lp_spr, previous.wm_lp_spr, | |
2530 | sizeof(results->wm_lp_spr)) == 0 && | |
2531 | memcmp(results->wm_linetime, previous.wm_linetime, | |
2532 | sizeof(results->wm_linetime)) == 0 && | |
cca32e9a PZ |
2533 | partitioning == prev_partitioning && |
2534 | results->enable_fbc_wm == prev_enable_fbc_wm) | |
801bcfff PZ |
2535 | return; |
2536 | ||
2537 | if (previous.wm_lp[2] != 0) | |
2538 | I915_WRITE(WM3_LP_ILK, 0); | |
2539 | if (previous.wm_lp[1] != 0) | |
2540 | I915_WRITE(WM2_LP_ILK, 0); | |
2541 | if (previous.wm_lp[0] != 0) | |
2542 | I915_WRITE(WM1_LP_ILK, 0); | |
2543 | ||
2544 | if (previous.wm_pipe[0] != results->wm_pipe[0]) | |
2545 | I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]); | |
2546 | if (previous.wm_pipe[1] != results->wm_pipe[1]) | |
2547 | I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]); | |
2548 | if (previous.wm_pipe[2] != results->wm_pipe[2]) | |
2549 | I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]); | |
2550 | ||
2551 | if (previous.wm_linetime[0] != results->wm_linetime[0]) | |
2552 | I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]); | |
2553 | if (previous.wm_linetime[1] != results->wm_linetime[1]) | |
2554 | I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]); | |
2555 | if (previous.wm_linetime[2] != results->wm_linetime[2]) | |
2556 | I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]); | |
2557 | ||
2558 | if (prev_partitioning != partitioning) { | |
2559 | val = I915_READ(WM_MISC); | |
2560 | if (partitioning == HSW_DATA_BUF_PART_1_2) | |
2561 | val &= ~WM_MISC_DATA_PARTITION_5_6; | |
2562 | else | |
2563 | val |= WM_MISC_DATA_PARTITION_5_6; | |
2564 | I915_WRITE(WM_MISC, val); | |
1011d8c4 PZ |
2565 | } |
2566 | ||
cca32e9a PZ |
2567 | if (prev_enable_fbc_wm != results->enable_fbc_wm) { |
2568 | val = I915_READ(DISP_ARB_CTL); | |
2569 | if (results->enable_fbc_wm) | |
2570 | val &= ~DISP_FBC_WM_DIS; | |
2571 | else | |
2572 | val |= DISP_FBC_WM_DIS; | |
2573 | I915_WRITE(DISP_ARB_CTL, val); | |
2574 | } | |
2575 | ||
801bcfff PZ |
2576 | if (previous.wm_lp_spr[0] != results->wm_lp_spr[0]) |
2577 | I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]); | |
2578 | if (previous.wm_lp_spr[1] != results->wm_lp_spr[1]) | |
2579 | I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]); | |
2580 | if (previous.wm_lp_spr[2] != results->wm_lp_spr[2]) | |
2581 | I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]); | |
2582 | ||
2583 | if (results->wm_lp[0] != 0) | |
2584 | I915_WRITE(WM1_LP_ILK, results->wm_lp[0]); | |
2585 | if (results->wm_lp[1] != 0) | |
2586 | I915_WRITE(WM2_LP_ILK, results->wm_lp[1]); | |
2587 | if (results->wm_lp[2] != 0) | |
2588 | I915_WRITE(WM3_LP_ILK, results->wm_lp[2]); | |
2589 | } | |
2590 | ||
2591 | static void haswell_update_wm(struct drm_device *dev) | |
2592 | { | |
2593 | struct drm_i915_private *dev_priv = dev->dev_private; | |
861f3389 | 2594 | struct hsw_wm_maximums lp_max_1_2, lp_max_5_6; |
801bcfff | 2595 | struct hsw_pipe_wm_parameters params[3]; |
861f3389 | 2596 | struct hsw_wm_values results_1_2, results_5_6, *best_results; |
801bcfff | 2597 | uint32_t wm[5]; |
861f3389 PZ |
2598 | enum hsw_data_buf_partitioning partitioning; |
2599 | ||
2600 | hsw_compute_wm_parameters(dev, params, wm, &lp_max_1_2, &lp_max_5_6); | |
2601 | ||
2602 | hsw_compute_wm_results(dev, params, wm, &lp_max_1_2, &results_1_2); | |
2603 | if (lp_max_1_2.pri != lp_max_5_6.pri) { | |
2604 | hsw_compute_wm_results(dev, params, wm, &lp_max_5_6, | |
2605 | &results_5_6); | |
2606 | best_results = hsw_find_best_result(&results_1_2, &results_5_6); | |
2607 | } else { | |
2608 | best_results = &results_1_2; | |
2609 | } | |
2610 | ||
2611 | partitioning = (best_results == &results_1_2) ? | |
2612 | HSW_DATA_BUF_PART_1_2 : HSW_DATA_BUF_PART_5_6; | |
801bcfff | 2613 | |
861f3389 | 2614 | hsw_write_wm_values(dev_priv, best_results, partitioning); |
1011d8c4 PZ |
2615 | } |
2616 | ||
526682e9 PZ |
2617 | static void haswell_update_sprite_wm(struct drm_device *dev, int pipe, |
2618 | uint32_t sprite_width, int pixel_size, | |
2619 | bool enable) | |
2620 | { | |
2621 | struct drm_plane *plane; | |
2622 | ||
2623 | list_for_each_entry(plane, &dev->mode_config.plane_list, head) { | |
2624 | struct intel_plane *intel_plane = to_intel_plane(plane); | |
2625 | ||
2626 | if (intel_plane->pipe == pipe) { | |
2627 | intel_plane->wm.enable = enable; | |
2628 | intel_plane->wm.horiz_pixels = sprite_width + 1; | |
2629 | intel_plane->wm.bytes_per_pixel = pixel_size; | |
2630 | break; | |
2631 | } | |
2632 | } | |
2633 | ||
2634 | haswell_update_wm(dev); | |
2635 | } | |
2636 | ||
b445e3b0 ED |
2637 | static bool |
2638 | sandybridge_compute_sprite_wm(struct drm_device *dev, int plane, | |
2639 | uint32_t sprite_width, int pixel_size, | |
2640 | const struct intel_watermark_params *display, | |
2641 | int display_latency_ns, int *sprite_wm) | |
2642 | { | |
2643 | struct drm_crtc *crtc; | |
2644 | int clock; | |
2645 | int entries, tlb_miss; | |
2646 | ||
2647 | crtc = intel_get_crtc_for_plane(dev, plane); | |
3490ea5d | 2648 | if (!intel_crtc_active(crtc)) { |
b445e3b0 ED |
2649 | *sprite_wm = display->guard_size; |
2650 | return false; | |
2651 | } | |
2652 | ||
2653 | clock = crtc->mode.clock; | |
2654 | ||
2655 | /* Use the small buffer method to calculate the sprite watermark */ | |
2656 | entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; | |
2657 | tlb_miss = display->fifo_size*display->cacheline_size - | |
2658 | sprite_width * 8; | |
2659 | if (tlb_miss > 0) | |
2660 | entries += tlb_miss; | |
2661 | entries = DIV_ROUND_UP(entries, display->cacheline_size); | |
2662 | *sprite_wm = entries + display->guard_size; | |
2663 | if (*sprite_wm > (int)display->max_wm) | |
2664 | *sprite_wm = display->max_wm; | |
2665 | ||
2666 | return true; | |
2667 | } | |
2668 | ||
2669 | static bool | |
2670 | sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane, | |
2671 | uint32_t sprite_width, int pixel_size, | |
2672 | const struct intel_watermark_params *display, | |
2673 | int latency_ns, int *sprite_wm) | |
2674 | { | |
2675 | struct drm_crtc *crtc; | |
2676 | unsigned long line_time_us; | |
2677 | int clock; | |
2678 | int line_count, line_size; | |
2679 | int small, large; | |
2680 | int entries; | |
2681 | ||
2682 | if (!latency_ns) { | |
2683 | *sprite_wm = 0; | |
2684 | return false; | |
2685 | } | |
2686 | ||
2687 | crtc = intel_get_crtc_for_plane(dev, plane); | |
2688 | clock = crtc->mode.clock; | |
2689 | if (!clock) { | |
2690 | *sprite_wm = 0; | |
2691 | return false; | |
2692 | } | |
2693 | ||
2694 | line_time_us = (sprite_width * 1000) / clock; | |
2695 | if (!line_time_us) { | |
2696 | *sprite_wm = 0; | |
2697 | return false; | |
2698 | } | |
2699 | ||
2700 | line_count = (latency_ns / line_time_us + 1000) / 1000; | |
2701 | line_size = sprite_width * pixel_size; | |
2702 | ||
2703 | /* Use the minimum of the small and large buffer method for primary */ | |
2704 | small = ((clock * pixel_size / 1000) * latency_ns) / 1000; | |
2705 | large = line_count * line_size; | |
2706 | ||
2707 | entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); | |
2708 | *sprite_wm = entries + display->guard_size; | |
2709 | ||
2710 | return *sprite_wm > 0x3ff ? false : true; | |
2711 | } | |
2712 | ||
1fa61106 | 2713 | static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe, |
4c4ff43a PZ |
2714 | uint32_t sprite_width, int pixel_size, |
2715 | bool enable) | |
b445e3b0 ED |
2716 | { |
2717 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2718 | int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ | |
2719 | u32 val; | |
2720 | int sprite_wm, reg; | |
2721 | int ret; | |
2722 | ||
4c4ff43a PZ |
2723 | if (!enable) |
2724 | return; | |
2725 | ||
b445e3b0 ED |
2726 | switch (pipe) { |
2727 | case 0: | |
2728 | reg = WM0_PIPEA_ILK; | |
2729 | break; | |
2730 | case 1: | |
2731 | reg = WM0_PIPEB_ILK; | |
2732 | break; | |
2733 | case 2: | |
2734 | reg = WM0_PIPEC_IVB; | |
2735 | break; | |
2736 | default: | |
2737 | return; /* bad pipe */ | |
2738 | } | |
2739 | ||
2740 | ret = sandybridge_compute_sprite_wm(dev, pipe, sprite_width, pixel_size, | |
2741 | &sandybridge_display_wm_info, | |
2742 | latency, &sprite_wm); | |
2743 | if (!ret) { | |
84f44ce7 VS |
2744 | DRM_DEBUG_KMS("failed to compute sprite wm for pipe %c\n", |
2745 | pipe_name(pipe)); | |
b445e3b0 ED |
2746 | return; |
2747 | } | |
2748 | ||
2749 | val = I915_READ(reg); | |
2750 | val &= ~WM0_PIPE_SPRITE_MASK; | |
2751 | I915_WRITE(reg, val | (sprite_wm << WM0_PIPE_SPRITE_SHIFT)); | |
84f44ce7 | 2752 | DRM_DEBUG_KMS("sprite watermarks For pipe %c - %d\n", pipe_name(pipe), sprite_wm); |
b445e3b0 ED |
2753 | |
2754 | ||
2755 | ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, | |
2756 | pixel_size, | |
2757 | &sandybridge_display_srwm_info, | |
2758 | SNB_READ_WM1_LATENCY() * 500, | |
2759 | &sprite_wm); | |
2760 | if (!ret) { | |
84f44ce7 VS |
2761 | DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n", |
2762 | pipe_name(pipe)); | |
b445e3b0 ED |
2763 | return; |
2764 | } | |
2765 | I915_WRITE(WM1S_LP_ILK, sprite_wm); | |
2766 | ||
2767 | /* Only IVB has two more LP watermarks for sprite */ | |
2768 | if (!IS_IVYBRIDGE(dev)) | |
2769 | return; | |
2770 | ||
2771 | ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, | |
2772 | pixel_size, | |
2773 | &sandybridge_display_srwm_info, | |
2774 | SNB_READ_WM2_LATENCY() * 500, | |
2775 | &sprite_wm); | |
2776 | if (!ret) { | |
84f44ce7 VS |
2777 | DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n", |
2778 | pipe_name(pipe)); | |
b445e3b0 ED |
2779 | return; |
2780 | } | |
2781 | I915_WRITE(WM2S_LP_IVB, sprite_wm); | |
2782 | ||
2783 | ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, | |
2784 | pixel_size, | |
2785 | &sandybridge_display_srwm_info, | |
2786 | SNB_READ_WM3_LATENCY() * 500, | |
2787 | &sprite_wm); | |
2788 | if (!ret) { | |
84f44ce7 VS |
2789 | DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n", |
2790 | pipe_name(pipe)); | |
b445e3b0 ED |
2791 | return; |
2792 | } | |
2793 | I915_WRITE(WM3S_LP_IVB, sprite_wm); | |
2794 | } | |
2795 | ||
2796 | /** | |
2797 | * intel_update_watermarks - update FIFO watermark values based on current modes | |
2798 | * | |
2799 | * Calculate watermark values for the various WM regs based on current mode | |
2800 | * and plane configuration. | |
2801 | * | |
2802 | * There are several cases to deal with here: | |
2803 | * - normal (i.e. non-self-refresh) | |
2804 | * - self-refresh (SR) mode | |
2805 | * - lines are large relative to FIFO size (buffer can hold up to 2) | |
2806 | * - lines are small relative to FIFO size (buffer can hold more than 2 | |
2807 | * lines), so need to account for TLB latency | |
2808 | * | |
2809 | * The normal calculation is: | |
2810 | * watermark = dotclock * bytes per pixel * latency | |
2811 | * where latency is platform & configuration dependent (we assume pessimal | |
2812 | * values here). | |
2813 | * | |
2814 | * The SR calculation is: | |
2815 | * watermark = (trunc(latency/line time)+1) * surface width * | |
2816 | * bytes per pixel | |
2817 | * where | |
2818 | * line time = htotal / dotclock | |
2819 | * surface width = hdisplay for normal plane and 64 for cursor | |
2820 | * and latency is assumed to be high, as above. | |
2821 | * | |
2822 | * The final value programmed to the register should always be rounded up, | |
2823 | * and include an extra 2 entries to account for clock crossings. | |
2824 | * | |
2825 | * We don't use the sprite, so we can ignore that. And on Crestline we have | |
2826 | * to set the non-SR watermarks to 8. | |
2827 | */ | |
2828 | void intel_update_watermarks(struct drm_device *dev) | |
2829 | { | |
2830 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2831 | ||
2832 | if (dev_priv->display.update_wm) | |
2833 | dev_priv->display.update_wm(dev); | |
2834 | } | |
2835 | ||
2836 | void intel_update_sprite_watermarks(struct drm_device *dev, int pipe, | |
4c4ff43a PZ |
2837 | uint32_t sprite_width, int pixel_size, |
2838 | bool enable) | |
b445e3b0 ED |
2839 | { |
2840 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2841 | ||
2842 | if (dev_priv->display.update_sprite_wm) | |
2843 | dev_priv->display.update_sprite_wm(dev, pipe, sprite_width, | |
4c4ff43a | 2844 | pixel_size, enable); |
b445e3b0 ED |
2845 | } |
2846 | ||
2b4e57bd ED |
2847 | static struct drm_i915_gem_object * |
2848 | intel_alloc_context_page(struct drm_device *dev) | |
2849 | { | |
2850 | struct drm_i915_gem_object *ctx; | |
2851 | int ret; | |
2852 | ||
2853 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
2854 | ||
2855 | ctx = i915_gem_alloc_object(dev, 4096); | |
2856 | if (!ctx) { | |
2857 | DRM_DEBUG("failed to alloc power context, RC6 disabled\n"); | |
2858 | return NULL; | |
2859 | } | |
2860 | ||
86a1ee26 | 2861 | ret = i915_gem_object_pin(ctx, 4096, true, false); |
2b4e57bd ED |
2862 | if (ret) { |
2863 | DRM_ERROR("failed to pin power context: %d\n", ret); | |
2864 | goto err_unref; | |
2865 | } | |
2866 | ||
2867 | ret = i915_gem_object_set_to_gtt_domain(ctx, 1); | |
2868 | if (ret) { | |
2869 | DRM_ERROR("failed to set-domain on power context: %d\n", ret); | |
2870 | goto err_unpin; | |
2871 | } | |
2872 | ||
2873 | return ctx; | |
2874 | ||
2875 | err_unpin: | |
2876 | i915_gem_object_unpin(ctx); | |
2877 | err_unref: | |
2878 | drm_gem_object_unreference(&ctx->base); | |
2b4e57bd ED |
2879 | return NULL; |
2880 | } | |
2881 | ||
9270388e DV |
2882 | /** |
2883 | * Lock protecting IPS related data structures | |
9270388e DV |
2884 | */ |
2885 | DEFINE_SPINLOCK(mchdev_lock); | |
2886 | ||
2887 | /* Global for IPS driver to get at the current i915 device. Protected by | |
2888 | * mchdev_lock. */ | |
2889 | static struct drm_i915_private *i915_mch_dev; | |
2890 | ||
2b4e57bd ED |
2891 | bool ironlake_set_drps(struct drm_device *dev, u8 val) |
2892 | { | |
2893 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2894 | u16 rgvswctl; | |
2895 | ||
9270388e DV |
2896 | assert_spin_locked(&mchdev_lock); |
2897 | ||
2b4e57bd ED |
2898 | rgvswctl = I915_READ16(MEMSWCTL); |
2899 | if (rgvswctl & MEMCTL_CMD_STS) { | |
2900 | DRM_DEBUG("gpu busy, RCS change rejected\n"); | |
2901 | return false; /* still busy with another command */ | |
2902 | } | |
2903 | ||
2904 | rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) | | |
2905 | (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM; | |
2906 | I915_WRITE16(MEMSWCTL, rgvswctl); | |
2907 | POSTING_READ16(MEMSWCTL); | |
2908 | ||
2909 | rgvswctl |= MEMCTL_CMD_STS; | |
2910 | I915_WRITE16(MEMSWCTL, rgvswctl); | |
2911 | ||
2912 | return true; | |
2913 | } | |
2914 | ||
8090c6b9 | 2915 | static void ironlake_enable_drps(struct drm_device *dev) |
2b4e57bd ED |
2916 | { |
2917 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2918 | u32 rgvmodectl = I915_READ(MEMMODECTL); | |
2919 | u8 fmax, fmin, fstart, vstart; | |
2920 | ||
9270388e DV |
2921 | spin_lock_irq(&mchdev_lock); |
2922 | ||
2b4e57bd ED |
2923 | /* Enable temp reporting */ |
2924 | I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN); | |
2925 | I915_WRITE16(TSC1, I915_READ(TSC1) | TSE); | |
2926 | ||
2927 | /* 100ms RC evaluation intervals */ | |
2928 | I915_WRITE(RCUPEI, 100000); | |
2929 | I915_WRITE(RCDNEI, 100000); | |
2930 | ||
2931 | /* Set max/min thresholds to 90ms and 80ms respectively */ | |
2932 | I915_WRITE(RCBMAXAVG, 90000); | |
2933 | I915_WRITE(RCBMINAVG, 80000); | |
2934 | ||
2935 | I915_WRITE(MEMIHYST, 1); | |
2936 | ||
2937 | /* Set up min, max, and cur for interrupt handling */ | |
2938 | fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT; | |
2939 | fmin = (rgvmodectl & MEMMODE_FMIN_MASK); | |
2940 | fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >> | |
2941 | MEMMODE_FSTART_SHIFT; | |
2942 | ||
2943 | vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >> | |
2944 | PXVFREQ_PX_SHIFT; | |
2945 | ||
20e4d407 DV |
2946 | dev_priv->ips.fmax = fmax; /* IPS callback will increase this */ |
2947 | dev_priv->ips.fstart = fstart; | |
2b4e57bd | 2948 | |
20e4d407 DV |
2949 | dev_priv->ips.max_delay = fstart; |
2950 | dev_priv->ips.min_delay = fmin; | |
2951 | dev_priv->ips.cur_delay = fstart; | |
2b4e57bd ED |
2952 | |
2953 | DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n", | |
2954 | fmax, fmin, fstart); | |
2955 | ||
2956 | I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN); | |
2957 | ||
2958 | /* | |
2959 | * Interrupts will be enabled in ironlake_irq_postinstall | |
2960 | */ | |
2961 | ||
2962 | I915_WRITE(VIDSTART, vstart); | |
2963 | POSTING_READ(VIDSTART); | |
2964 | ||
2965 | rgvmodectl |= MEMMODE_SWMODE_EN; | |
2966 | I915_WRITE(MEMMODECTL, rgvmodectl); | |
2967 | ||
9270388e | 2968 | if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10)) |
2b4e57bd | 2969 | DRM_ERROR("stuck trying to change perf mode\n"); |
9270388e | 2970 | mdelay(1); |
2b4e57bd ED |
2971 | |
2972 | ironlake_set_drps(dev, fstart); | |
2973 | ||
20e4d407 | 2974 | dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) + |
2b4e57bd | 2975 | I915_READ(0x112e0); |
20e4d407 DV |
2976 | dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies); |
2977 | dev_priv->ips.last_count2 = I915_READ(0x112f4); | |
2978 | getrawmonotonic(&dev_priv->ips.last_time2); | |
9270388e DV |
2979 | |
2980 | spin_unlock_irq(&mchdev_lock); | |
2b4e57bd ED |
2981 | } |
2982 | ||
8090c6b9 | 2983 | static void ironlake_disable_drps(struct drm_device *dev) |
2b4e57bd ED |
2984 | { |
2985 | struct drm_i915_private *dev_priv = dev->dev_private; | |
9270388e DV |
2986 | u16 rgvswctl; |
2987 | ||
2988 | spin_lock_irq(&mchdev_lock); | |
2989 | ||
2990 | rgvswctl = I915_READ16(MEMSWCTL); | |
2b4e57bd ED |
2991 | |
2992 | /* Ack interrupts, disable EFC interrupt */ | |
2993 | I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN); | |
2994 | I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG); | |
2995 | I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT); | |
2996 | I915_WRITE(DEIIR, DE_PCU_EVENT); | |
2997 | I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT); | |
2998 | ||
2999 | /* Go back to the starting frequency */ | |
20e4d407 | 3000 | ironlake_set_drps(dev, dev_priv->ips.fstart); |
9270388e | 3001 | mdelay(1); |
2b4e57bd ED |
3002 | rgvswctl |= MEMCTL_CMD_STS; |
3003 | I915_WRITE(MEMSWCTL, rgvswctl); | |
9270388e | 3004 | mdelay(1); |
2b4e57bd | 3005 | |
9270388e | 3006 | spin_unlock_irq(&mchdev_lock); |
2b4e57bd ED |
3007 | } |
3008 | ||
acbe9475 DV |
3009 | /* There's a funny hw issue where the hw returns all 0 when reading from |
3010 | * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value | |
3011 | * ourselves, instead of doing a rmw cycle (which might result in us clearing | |
3012 | * all limits and the gpu stuck at whatever frequency it is at atm). | |
3013 | */ | |
65bccb5c | 3014 | static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 *val) |
2b4e57bd | 3015 | { |
7b9e0ae6 | 3016 | u32 limits; |
2b4e57bd | 3017 | |
7b9e0ae6 | 3018 | limits = 0; |
c6a828d3 DV |
3019 | |
3020 | if (*val >= dev_priv->rps.max_delay) | |
3021 | *val = dev_priv->rps.max_delay; | |
3022 | limits |= dev_priv->rps.max_delay << 24; | |
20b46e59 DV |
3023 | |
3024 | /* Only set the down limit when we've reached the lowest level to avoid | |
3025 | * getting more interrupts, otherwise leave this clear. This prevents a | |
3026 | * race in the hw when coming out of rc6: There's a tiny window where | |
3027 | * the hw runs at the minimal clock before selecting the desired | |
3028 | * frequency, if the down threshold expires in that window we will not | |
3029 | * receive a down interrupt. */ | |
c6a828d3 DV |
3030 | if (*val <= dev_priv->rps.min_delay) { |
3031 | *val = dev_priv->rps.min_delay; | |
3032 | limits |= dev_priv->rps.min_delay << 16; | |
20b46e59 DV |
3033 | } |
3034 | ||
3035 | return limits; | |
3036 | } | |
3037 | ||
3038 | void gen6_set_rps(struct drm_device *dev, u8 val) | |
3039 | { | |
3040 | struct drm_i915_private *dev_priv = dev->dev_private; | |
65bccb5c | 3041 | u32 limits = gen6_rps_limits(dev_priv, &val); |
7b9e0ae6 | 3042 | |
4fc688ce | 3043 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
79249636 BW |
3044 | WARN_ON(val > dev_priv->rps.max_delay); |
3045 | WARN_ON(val < dev_priv->rps.min_delay); | |
004777cb | 3046 | |
c6a828d3 | 3047 | if (val == dev_priv->rps.cur_delay) |
7b9e0ae6 CW |
3048 | return; |
3049 | ||
92bd1bf0 RV |
3050 | if (IS_HASWELL(dev)) |
3051 | I915_WRITE(GEN6_RPNSWREQ, | |
3052 | HSW_FREQUENCY(val)); | |
3053 | else | |
3054 | I915_WRITE(GEN6_RPNSWREQ, | |
3055 | GEN6_FREQUENCY(val) | | |
3056 | GEN6_OFFSET(0) | | |
3057 | GEN6_AGGRESSIVE_TURBO); | |
7b9e0ae6 CW |
3058 | |
3059 | /* Make sure we continue to get interrupts | |
3060 | * until we hit the minimum or maximum frequencies. | |
3061 | */ | |
3062 | I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, limits); | |
3063 | ||
d5570a72 BW |
3064 | POSTING_READ(GEN6_RPNSWREQ); |
3065 | ||
c6a828d3 | 3066 | dev_priv->rps.cur_delay = val; |
be2cde9a DV |
3067 | |
3068 | trace_intel_gpu_freq_change(val * 50); | |
2b4e57bd ED |
3069 | } |
3070 | ||
80814ae4 VS |
3071 | /* |
3072 | * Wait until the previous freq change has completed, | |
3073 | * or the timeout elapsed, and then update our notion | |
3074 | * of the current GPU frequency. | |
3075 | */ | |
3076 | static void vlv_update_rps_cur_delay(struct drm_i915_private *dev_priv) | |
3077 | { | |
3078 | unsigned long timeout = jiffies + msecs_to_jiffies(10); | |
3079 | u32 pval; | |
3080 | ||
3081 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); | |
3082 | ||
3083 | do { | |
3084 | pval = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); | |
3085 | if (time_after(jiffies, timeout)) { | |
3086 | DRM_DEBUG_DRIVER("timed out waiting for Punit\n"); | |
3087 | break; | |
3088 | } | |
3089 | udelay(10); | |
3090 | } while (pval & 1); | |
3091 | ||
3092 | pval >>= 8; | |
3093 | ||
3094 | if (pval != dev_priv->rps.cur_delay) | |
3095 | DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n", | |
3096 | vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.cur_delay), | |
3097 | dev_priv->rps.cur_delay, | |
3098 | vlv_gpu_freq(dev_priv->mem_freq, pval), pval); | |
3099 | ||
3100 | dev_priv->rps.cur_delay = pval; | |
3101 | } | |
3102 | ||
0a073b84 JB |
3103 | void valleyview_set_rps(struct drm_device *dev, u8 val) |
3104 | { | |
3105 | struct drm_i915_private *dev_priv = dev->dev_private; | |
7a67092a VS |
3106 | |
3107 | gen6_rps_limits(dev_priv, &val); | |
0a073b84 JB |
3108 | |
3109 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); | |
3110 | WARN_ON(val > dev_priv->rps.max_delay); | |
3111 | WARN_ON(val < dev_priv->rps.min_delay); | |
3112 | ||
80814ae4 VS |
3113 | vlv_update_rps_cur_delay(dev_priv); |
3114 | ||
73008b98 | 3115 | DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n", |
0a073b84 JB |
3116 | vlv_gpu_freq(dev_priv->mem_freq, |
3117 | dev_priv->rps.cur_delay), | |
73008b98 VS |
3118 | dev_priv->rps.cur_delay, |
3119 | vlv_gpu_freq(dev_priv->mem_freq, val), val); | |
0a073b84 JB |
3120 | |
3121 | if (val == dev_priv->rps.cur_delay) | |
3122 | return; | |
3123 | ||
ae99258f | 3124 | vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val); |
0a073b84 | 3125 | |
80814ae4 | 3126 | dev_priv->rps.cur_delay = val; |
0a073b84 JB |
3127 | |
3128 | trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv->mem_freq, val)); | |
3129 | } | |
3130 | ||
3131 | ||
8090c6b9 | 3132 | static void gen6_disable_rps(struct drm_device *dev) |
2b4e57bd ED |
3133 | { |
3134 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3135 | ||
88509484 | 3136 | I915_WRITE(GEN6_RC_CONTROL, 0); |
2b4e57bd ED |
3137 | I915_WRITE(GEN6_RPNSWREQ, 1 << 31); |
3138 | I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); | |
4848405c | 3139 | I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS); |
2b4e57bd ED |
3140 | /* Complete PM interrupt masking here doesn't race with the rps work |
3141 | * item again unmasking PM interrupts because that is using a different | |
3142 | * register (PMIMR) to mask PM interrupts. The only risk is in leaving | |
3143 | * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ | |
3144 | ||
c6a828d3 DV |
3145 | spin_lock_irq(&dev_priv->rps.lock); |
3146 | dev_priv->rps.pm_iir = 0; | |
3147 | spin_unlock_irq(&dev_priv->rps.lock); | |
2b4e57bd | 3148 | |
4848405c | 3149 | I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); |
2b4e57bd ED |
3150 | } |
3151 | ||
d20d4f0c JB |
3152 | static void valleyview_disable_rps(struct drm_device *dev) |
3153 | { | |
3154 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3155 | ||
3156 | I915_WRITE(GEN6_RC_CONTROL, 0); | |
3157 | I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); | |
3158 | I915_WRITE(GEN6_PMIER, 0); | |
3159 | /* Complete PM interrupt masking here doesn't race with the rps work | |
3160 | * item again unmasking PM interrupts because that is using a different | |
3161 | * register (PMIMR) to mask PM interrupts. The only risk is in leaving | |
3162 | * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ | |
3163 | ||
3164 | spin_lock_irq(&dev_priv->rps.lock); | |
3165 | dev_priv->rps.pm_iir = 0; | |
3166 | spin_unlock_irq(&dev_priv->rps.lock); | |
3167 | ||
3168 | I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR)); | |
c9cddffc JB |
3169 | |
3170 | if (dev_priv->vlv_pctx) { | |
3171 | drm_gem_object_unreference(&dev_priv->vlv_pctx->base); | |
3172 | dev_priv->vlv_pctx = NULL; | |
3173 | } | |
d20d4f0c JB |
3174 | } |
3175 | ||
2b4e57bd ED |
3176 | int intel_enable_rc6(const struct drm_device *dev) |
3177 | { | |
456470eb | 3178 | /* Respect the kernel parameter if it is set */ |
2b4e57bd ED |
3179 | if (i915_enable_rc6 >= 0) |
3180 | return i915_enable_rc6; | |
3181 | ||
6567d748 CW |
3182 | /* Disable RC6 on Ironlake */ |
3183 | if (INTEL_INFO(dev)->gen == 5) | |
3184 | return 0; | |
2b4e57bd | 3185 | |
456470eb DV |
3186 | if (IS_HASWELL(dev)) { |
3187 | DRM_DEBUG_DRIVER("Haswell: only RC6 available\n"); | |
4a637c2c | 3188 | return INTEL_RC6_ENABLE; |
456470eb | 3189 | } |
2b4e57bd | 3190 | |
456470eb | 3191 | /* snb/ivb have more than one rc6 state. */ |
2b4e57bd ED |
3192 | if (INTEL_INFO(dev)->gen == 6) { |
3193 | DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n"); | |
3194 | return INTEL_RC6_ENABLE; | |
3195 | } | |
456470eb | 3196 | |
2b4e57bd ED |
3197 | DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n"); |
3198 | return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE); | |
3199 | } | |
3200 | ||
79f5b2c7 | 3201 | static void gen6_enable_rps(struct drm_device *dev) |
2b4e57bd | 3202 | { |
79f5b2c7 | 3203 | struct drm_i915_private *dev_priv = dev->dev_private; |
b4519513 | 3204 | struct intel_ring_buffer *ring; |
7b9e0ae6 CW |
3205 | u32 rp_state_cap; |
3206 | u32 gt_perf_status; | |
31643d54 | 3207 | u32 rc6vids, pcu_mbox, rc6_mask = 0; |
2b4e57bd | 3208 | u32 gtfifodbg; |
2b4e57bd | 3209 | int rc6_mode; |
42c0526c | 3210 | int i, ret; |
2b4e57bd | 3211 | |
4fc688ce | 3212 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
79f5b2c7 | 3213 | |
2b4e57bd ED |
3214 | /* Here begins a magic sequence of register writes to enable |
3215 | * auto-downclocking. | |
3216 | * | |
3217 | * Perhaps there might be some value in exposing these to | |
3218 | * userspace... | |
3219 | */ | |
3220 | I915_WRITE(GEN6_RC_STATE, 0); | |
2b4e57bd ED |
3221 | |
3222 | /* Clear the DBG now so we don't confuse earlier errors */ | |
3223 | if ((gtfifodbg = I915_READ(GTFIFODBG))) { | |
3224 | DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg); | |
3225 | I915_WRITE(GTFIFODBG, gtfifodbg); | |
3226 | } | |
3227 | ||
3228 | gen6_gt_force_wake_get(dev_priv); | |
3229 | ||
7b9e0ae6 CW |
3230 | rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); |
3231 | gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS); | |
3232 | ||
31c77388 BW |
3233 | /* In units of 50MHz */ |
3234 | dev_priv->rps.hw_max = dev_priv->rps.max_delay = rp_state_cap & 0xff; | |
c6a828d3 DV |
3235 | dev_priv->rps.min_delay = (rp_state_cap & 0xff0000) >> 16; |
3236 | dev_priv->rps.cur_delay = 0; | |
7b9e0ae6 | 3237 | |
2b4e57bd ED |
3238 | /* disable the counters and set deterministic thresholds */ |
3239 | I915_WRITE(GEN6_RC_CONTROL, 0); | |
3240 | ||
3241 | I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16); | |
3242 | I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30); | |
3243 | I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30); | |
3244 | I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); | |
3245 | I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); | |
3246 | ||
b4519513 CW |
3247 | for_each_ring(ring, dev_priv, i) |
3248 | I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); | |
2b4e57bd ED |
3249 | |
3250 | I915_WRITE(GEN6_RC_SLEEP, 0); | |
3251 | I915_WRITE(GEN6_RC1e_THRESHOLD, 1000); | |
3252 | I915_WRITE(GEN6_RC6_THRESHOLD, 50000); | |
0920a487 | 3253 | I915_WRITE(GEN6_RC6p_THRESHOLD, 150000); |
2b4e57bd ED |
3254 | I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */ |
3255 | ||
5a7dc92a | 3256 | /* Check if we are enabling RC6 */ |
2b4e57bd ED |
3257 | rc6_mode = intel_enable_rc6(dev_priv->dev); |
3258 | if (rc6_mode & INTEL_RC6_ENABLE) | |
3259 | rc6_mask |= GEN6_RC_CTL_RC6_ENABLE; | |
3260 | ||
5a7dc92a ED |
3261 | /* We don't use those on Haswell */ |
3262 | if (!IS_HASWELL(dev)) { | |
3263 | if (rc6_mode & INTEL_RC6p_ENABLE) | |
3264 | rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE; | |
2b4e57bd | 3265 | |
5a7dc92a ED |
3266 | if (rc6_mode & INTEL_RC6pp_ENABLE) |
3267 | rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE; | |
3268 | } | |
2b4e57bd ED |
3269 | |
3270 | DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n", | |
5a7dc92a ED |
3271 | (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off", |
3272 | (rc6_mask & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off", | |
3273 | (rc6_mask & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off"); | |
2b4e57bd ED |
3274 | |
3275 | I915_WRITE(GEN6_RC_CONTROL, | |
3276 | rc6_mask | | |
3277 | GEN6_RC_CTL_EI_MODE(1) | | |
3278 | GEN6_RC_CTL_HW_ENABLE); | |
3279 | ||
92bd1bf0 RV |
3280 | if (IS_HASWELL(dev)) { |
3281 | I915_WRITE(GEN6_RPNSWREQ, | |
3282 | HSW_FREQUENCY(10)); | |
3283 | I915_WRITE(GEN6_RC_VIDEO_FREQ, | |
3284 | HSW_FREQUENCY(12)); | |
3285 | } else { | |
3286 | I915_WRITE(GEN6_RPNSWREQ, | |
3287 | GEN6_FREQUENCY(10) | | |
3288 | GEN6_OFFSET(0) | | |
3289 | GEN6_AGGRESSIVE_TURBO); | |
3290 | I915_WRITE(GEN6_RC_VIDEO_FREQ, | |
3291 | GEN6_FREQUENCY(12)); | |
3292 | } | |
2b4e57bd ED |
3293 | |
3294 | I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000); | |
3295 | I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, | |
c6a828d3 DV |
3296 | dev_priv->rps.max_delay << 24 | |
3297 | dev_priv->rps.min_delay << 16); | |
5a7dc92a | 3298 | |
1ee9ae32 DV |
3299 | I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400); |
3300 | I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000); | |
3301 | I915_WRITE(GEN6_RP_UP_EI, 66000); | |
3302 | I915_WRITE(GEN6_RP_DOWN_EI, 350000); | |
5a7dc92a | 3303 | |
2b4e57bd ED |
3304 | I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); |
3305 | I915_WRITE(GEN6_RP_CONTROL, | |
3306 | GEN6_RP_MEDIA_TURBO | | |
89ba829e | 3307 | GEN6_RP_MEDIA_HW_NORMAL_MODE | |
2b4e57bd ED |
3308 | GEN6_RP_MEDIA_IS_GFX | |
3309 | GEN6_RP_ENABLE | | |
3310 | GEN6_RP_UP_BUSY_AVG | | |
5a7dc92a | 3311 | (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT)); |
2b4e57bd | 3312 | |
42c0526c | 3313 | ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0); |
988b36e5 | 3314 | if (!ret) { |
42c0526c BW |
3315 | pcu_mbox = 0; |
3316 | ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox); | |
a2b3fc01 | 3317 | if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */ |
10e08497 | 3318 | DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n", |
a2b3fc01 BW |
3319 | (dev_priv->rps.max_delay & 0xff) * 50, |
3320 | (pcu_mbox & 0xff) * 50); | |
31c77388 | 3321 | dev_priv->rps.hw_max = pcu_mbox & 0xff; |
42c0526c BW |
3322 | } |
3323 | } else { | |
3324 | DRM_DEBUG_DRIVER("Failed to set the min frequency\n"); | |
2b4e57bd ED |
3325 | } |
3326 | ||
7b9e0ae6 | 3327 | gen6_set_rps(dev_priv->dev, (gt_perf_status & 0xff00) >> 8); |
2b4e57bd ED |
3328 | |
3329 | /* requires MSI enabled */ | |
4848405c | 3330 | I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) | GEN6_PM_RPS_EVENTS); |
c6a828d3 | 3331 | spin_lock_irq(&dev_priv->rps.lock); |
eda63ffb BW |
3332 | /* FIXME: Our interrupt enabling sequence is bonghits. |
3333 | * dev_priv->rps.pm_iir really should be 0 here. */ | |
3334 | dev_priv->rps.pm_iir = 0; | |
4848405c BW |
3335 | I915_WRITE(GEN6_PMIMR, I915_READ(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS); |
3336 | I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); | |
c6a828d3 | 3337 | spin_unlock_irq(&dev_priv->rps.lock); |
4848405c | 3338 | /* unmask all PM interrupts */ |
2b4e57bd ED |
3339 | I915_WRITE(GEN6_PMINTRMSK, 0); |
3340 | ||
31643d54 BW |
3341 | rc6vids = 0; |
3342 | ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids); | |
3343 | if (IS_GEN6(dev) && ret) { | |
3344 | DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n"); | |
3345 | } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) { | |
3346 | DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n", | |
3347 | GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450); | |
3348 | rc6vids &= 0xffff00; | |
3349 | rc6vids |= GEN6_ENCODE_RC6_VID(450); | |
3350 | ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids); | |
3351 | if (ret) | |
3352 | DRM_ERROR("Couldn't fix incorrect rc6 voltage\n"); | |
3353 | } | |
3354 | ||
2b4e57bd | 3355 | gen6_gt_force_wake_put(dev_priv); |
2b4e57bd ED |
3356 | } |
3357 | ||
79f5b2c7 | 3358 | static void gen6_update_ring_freq(struct drm_device *dev) |
2b4e57bd | 3359 | { |
79f5b2c7 | 3360 | struct drm_i915_private *dev_priv = dev->dev_private; |
2b4e57bd | 3361 | int min_freq = 15; |
3ebecd07 CW |
3362 | unsigned int gpu_freq; |
3363 | unsigned int max_ia_freq, min_ring_freq; | |
2b4e57bd ED |
3364 | int scaling_factor = 180; |
3365 | ||
4fc688ce | 3366 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
79f5b2c7 | 3367 | |
2b4e57bd ED |
3368 | max_ia_freq = cpufreq_quick_get_max(0); |
3369 | /* | |
3370 | * Default to measured freq if none found, PCU will ensure we don't go | |
3371 | * over | |
3372 | */ | |
3373 | if (!max_ia_freq) | |
3374 | max_ia_freq = tsc_khz; | |
3375 | ||
3376 | /* Convert from kHz to MHz */ | |
3377 | max_ia_freq /= 1000; | |
3378 | ||
3ebecd07 CW |
3379 | min_ring_freq = I915_READ(MCHBAR_MIRROR_BASE_SNB + DCLK); |
3380 | /* convert DDR frequency from units of 133.3MHz to bandwidth */ | |
3381 | min_ring_freq = (2 * 4 * min_ring_freq + 2) / 3; | |
3382 | ||
2b4e57bd ED |
3383 | /* |
3384 | * For each potential GPU frequency, load a ring frequency we'd like | |
3385 | * to use for memory access. We do this by specifying the IA frequency | |
3386 | * the PCU should use as a reference to determine the ring frequency. | |
3387 | */ | |
c6a828d3 | 3388 | for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay; |
2b4e57bd | 3389 | gpu_freq--) { |
c6a828d3 | 3390 | int diff = dev_priv->rps.max_delay - gpu_freq; |
3ebecd07 CW |
3391 | unsigned int ia_freq = 0, ring_freq = 0; |
3392 | ||
3393 | if (IS_HASWELL(dev)) { | |
3394 | ring_freq = (gpu_freq * 5 + 3) / 4; | |
3395 | ring_freq = max(min_ring_freq, ring_freq); | |
3396 | /* leave ia_freq as the default, chosen by cpufreq */ | |
3397 | } else { | |
3398 | /* On older processors, there is no separate ring | |
3399 | * clock domain, so in order to boost the bandwidth | |
3400 | * of the ring, we need to upclock the CPU (ia_freq). | |
3401 | * | |
3402 | * For GPU frequencies less than 750MHz, | |
3403 | * just use the lowest ring freq. | |
3404 | */ | |
3405 | if (gpu_freq < min_freq) | |
3406 | ia_freq = 800; | |
3407 | else | |
3408 | ia_freq = max_ia_freq - ((diff * scaling_factor) / 2); | |
3409 | ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100); | |
3410 | } | |
2b4e57bd | 3411 | |
42c0526c BW |
3412 | sandybridge_pcode_write(dev_priv, |
3413 | GEN6_PCODE_WRITE_MIN_FREQ_TABLE, | |
3ebecd07 CW |
3414 | ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT | |
3415 | ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT | | |
3416 | gpu_freq); | |
2b4e57bd | 3417 | } |
2b4e57bd ED |
3418 | } |
3419 | ||
0a073b84 JB |
3420 | int valleyview_rps_max_freq(struct drm_i915_private *dev_priv) |
3421 | { | |
3422 | u32 val, rp0; | |
3423 | ||
64936258 | 3424 | val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE); |
0a073b84 JB |
3425 | |
3426 | rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT; | |
3427 | /* Clamp to max */ | |
3428 | rp0 = min_t(u32, rp0, 0xea); | |
3429 | ||
3430 | return rp0; | |
3431 | } | |
3432 | ||
3433 | static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv) | |
3434 | { | |
3435 | u32 val, rpe; | |
3436 | ||
64936258 | 3437 | val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO); |
0a073b84 | 3438 | rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT; |
64936258 | 3439 | val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI); |
0a073b84 JB |
3440 | rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5; |
3441 | ||
3442 | return rpe; | |
3443 | } | |
3444 | ||
3445 | int valleyview_rps_min_freq(struct drm_i915_private *dev_priv) | |
3446 | { | |
64936258 | 3447 | return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff; |
0a073b84 JB |
3448 | } |
3449 | ||
52ceb908 JB |
3450 | static void vlv_rps_timer_work(struct work_struct *work) |
3451 | { | |
3452 | drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, | |
3453 | rps.vlv_work.work); | |
3454 | ||
3455 | /* | |
3456 | * Timer fired, we must be idle. Drop to min voltage state. | |
3457 | * Note: we use RPe here since it should match the | |
3458 | * Vmin we were shooting for. That should give us better | |
3459 | * perf when we come back out of RC6 than if we used the | |
3460 | * min freq available. | |
3461 | */ | |
3462 | mutex_lock(&dev_priv->rps.hw_lock); | |
6dc58488 VS |
3463 | if (dev_priv->rps.cur_delay > dev_priv->rps.rpe_delay) |
3464 | valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay); | |
52ceb908 JB |
3465 | mutex_unlock(&dev_priv->rps.hw_lock); |
3466 | } | |
3467 | ||
c9cddffc JB |
3468 | static void valleyview_setup_pctx(struct drm_device *dev) |
3469 | { | |
3470 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3471 | struct drm_i915_gem_object *pctx; | |
3472 | unsigned long pctx_paddr; | |
3473 | u32 pcbr; | |
3474 | int pctx_size = 24*1024; | |
3475 | ||
3476 | pcbr = I915_READ(VLV_PCBR); | |
3477 | if (pcbr) { | |
3478 | /* BIOS set it up already, grab the pre-alloc'd space */ | |
3479 | int pcbr_offset; | |
3480 | ||
3481 | pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base; | |
3482 | pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev, | |
3483 | pcbr_offset, | |
3727d55e | 3484 | -1, |
c9cddffc JB |
3485 | pctx_size); |
3486 | goto out; | |
3487 | } | |
3488 | ||
3489 | /* | |
3490 | * From the Gunit register HAS: | |
3491 | * The Gfx driver is expected to program this register and ensure | |
3492 | * proper allocation within Gfx stolen memory. For example, this | |
3493 | * register should be programmed such than the PCBR range does not | |
3494 | * overlap with other ranges, such as the frame buffer, protected | |
3495 | * memory, or any other relevant ranges. | |
3496 | */ | |
3497 | pctx = i915_gem_object_create_stolen(dev, pctx_size); | |
3498 | if (!pctx) { | |
3499 | DRM_DEBUG("not enough stolen space for PCTX, disabling\n"); | |
3500 | return; | |
3501 | } | |
3502 | ||
3503 | pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start; | |
3504 | I915_WRITE(VLV_PCBR, pctx_paddr); | |
3505 | ||
3506 | out: | |
3507 | dev_priv->vlv_pctx = pctx; | |
3508 | } | |
3509 | ||
0a073b84 JB |
3510 | static void valleyview_enable_rps(struct drm_device *dev) |
3511 | { | |
3512 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3513 | struct intel_ring_buffer *ring; | |
73008b98 | 3514 | u32 gtfifodbg, val; |
0a073b84 JB |
3515 | int i; |
3516 | ||
3517 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); | |
3518 | ||
3519 | if ((gtfifodbg = I915_READ(GTFIFODBG))) { | |
3520 | DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg); | |
3521 | I915_WRITE(GTFIFODBG, gtfifodbg); | |
3522 | } | |
3523 | ||
c9cddffc JB |
3524 | valleyview_setup_pctx(dev); |
3525 | ||
0a073b84 JB |
3526 | gen6_gt_force_wake_get(dev_priv); |
3527 | ||
3528 | I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400); | |
3529 | I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000); | |
3530 | I915_WRITE(GEN6_RP_UP_EI, 66000); | |
3531 | I915_WRITE(GEN6_RP_DOWN_EI, 350000); | |
3532 | ||
3533 | I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); | |
3534 | ||
3535 | I915_WRITE(GEN6_RP_CONTROL, | |
3536 | GEN6_RP_MEDIA_TURBO | | |
3537 | GEN6_RP_MEDIA_HW_NORMAL_MODE | | |
3538 | GEN6_RP_MEDIA_IS_GFX | | |
3539 | GEN6_RP_ENABLE | | |
3540 | GEN6_RP_UP_BUSY_AVG | | |
3541 | GEN6_RP_DOWN_IDLE_CONT); | |
3542 | ||
3543 | I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000); | |
3544 | I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); | |
3545 | I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); | |
3546 | ||
3547 | for_each_ring(ring, dev_priv, i) | |
3548 | I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); | |
3549 | ||
3550 | I915_WRITE(GEN6_RC6_THRESHOLD, 0xc350); | |
3551 | ||
3552 | /* allows RC6 residency counter to work */ | |
3553 | I915_WRITE(0x138104, _MASKED_BIT_ENABLE(0x3)); | |
3554 | I915_WRITE(GEN6_RC_CONTROL, | |
3555 | GEN7_RC_CTL_TO_MODE); | |
3556 | ||
64936258 | 3557 | val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); |
2445966e JB |
3558 | switch ((val >> 6) & 3) { |
3559 | case 0: | |
3560 | case 1: | |
3561 | dev_priv->mem_freq = 800; | |
3562 | break; | |
3563 | case 2: | |
3564 | dev_priv->mem_freq = 1066; | |
3565 | break; | |
3566 | case 3: | |
3567 | dev_priv->mem_freq = 1333; | |
3568 | break; | |
3569 | } | |
0a073b84 JB |
3570 | DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq); |
3571 | ||
3572 | DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no"); | |
3573 | DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val); | |
3574 | ||
0a073b84 | 3575 | dev_priv->rps.cur_delay = (val >> 8) & 0xff; |
73008b98 VS |
3576 | DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n", |
3577 | vlv_gpu_freq(dev_priv->mem_freq, | |
3578 | dev_priv->rps.cur_delay), | |
3579 | dev_priv->rps.cur_delay); | |
0a073b84 JB |
3580 | |
3581 | dev_priv->rps.max_delay = valleyview_rps_max_freq(dev_priv); | |
3582 | dev_priv->rps.hw_max = dev_priv->rps.max_delay; | |
73008b98 VS |
3583 | DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n", |
3584 | vlv_gpu_freq(dev_priv->mem_freq, | |
3585 | dev_priv->rps.max_delay), | |
3586 | dev_priv->rps.max_delay); | |
0a073b84 | 3587 | |
73008b98 VS |
3588 | dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv); |
3589 | DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n", | |
3590 | vlv_gpu_freq(dev_priv->mem_freq, | |
3591 | dev_priv->rps.rpe_delay), | |
3592 | dev_priv->rps.rpe_delay); | |
0a073b84 | 3593 | |
73008b98 VS |
3594 | dev_priv->rps.min_delay = valleyview_rps_min_freq(dev_priv); |
3595 | DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n", | |
3596 | vlv_gpu_freq(dev_priv->mem_freq, | |
3597 | dev_priv->rps.min_delay), | |
3598 | dev_priv->rps.min_delay); | |
0a073b84 | 3599 | |
73008b98 VS |
3600 | DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n", |
3601 | vlv_gpu_freq(dev_priv->mem_freq, | |
3602 | dev_priv->rps.rpe_delay), | |
3603 | dev_priv->rps.rpe_delay); | |
0a073b84 | 3604 | |
52ceb908 JB |
3605 | INIT_DELAYED_WORK(&dev_priv->rps.vlv_work, vlv_rps_timer_work); |
3606 | ||
73008b98 | 3607 | valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay); |
0a073b84 JB |
3608 | |
3609 | /* requires MSI enabled */ | |
4848405c | 3610 | I915_WRITE(GEN6_PMIER, GEN6_PM_RPS_EVENTS); |
0a073b84 JB |
3611 | spin_lock_irq(&dev_priv->rps.lock); |
3612 | WARN_ON(dev_priv->rps.pm_iir != 0); | |
3613 | I915_WRITE(GEN6_PMIMR, 0); | |
3614 | spin_unlock_irq(&dev_priv->rps.lock); | |
3615 | /* enable all PM interrupts */ | |
3616 | I915_WRITE(GEN6_PMINTRMSK, 0); | |
3617 | ||
3618 | gen6_gt_force_wake_put(dev_priv); | |
3619 | } | |
3620 | ||
930ebb46 | 3621 | void ironlake_teardown_rc6(struct drm_device *dev) |
2b4e57bd ED |
3622 | { |
3623 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3624 | ||
3e373948 DV |
3625 | if (dev_priv->ips.renderctx) { |
3626 | i915_gem_object_unpin(dev_priv->ips.renderctx); | |
3627 | drm_gem_object_unreference(&dev_priv->ips.renderctx->base); | |
3628 | dev_priv->ips.renderctx = NULL; | |
2b4e57bd ED |
3629 | } |
3630 | ||
3e373948 DV |
3631 | if (dev_priv->ips.pwrctx) { |
3632 | i915_gem_object_unpin(dev_priv->ips.pwrctx); | |
3633 | drm_gem_object_unreference(&dev_priv->ips.pwrctx->base); | |
3634 | dev_priv->ips.pwrctx = NULL; | |
2b4e57bd ED |
3635 | } |
3636 | } | |
3637 | ||
930ebb46 | 3638 | static void ironlake_disable_rc6(struct drm_device *dev) |
2b4e57bd ED |
3639 | { |
3640 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3641 | ||
3642 | if (I915_READ(PWRCTXA)) { | |
3643 | /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */ | |
3644 | I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT); | |
3645 | wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON), | |
3646 | 50); | |
3647 | ||
3648 | I915_WRITE(PWRCTXA, 0); | |
3649 | POSTING_READ(PWRCTXA); | |
3650 | ||
3651 | I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); | |
3652 | POSTING_READ(RSTDBYCTL); | |
3653 | } | |
2b4e57bd ED |
3654 | } |
3655 | ||
3656 | static int ironlake_setup_rc6(struct drm_device *dev) | |
3657 | { | |
3658 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3659 | ||
3e373948 DV |
3660 | if (dev_priv->ips.renderctx == NULL) |
3661 | dev_priv->ips.renderctx = intel_alloc_context_page(dev); | |
3662 | if (!dev_priv->ips.renderctx) | |
2b4e57bd ED |
3663 | return -ENOMEM; |
3664 | ||
3e373948 DV |
3665 | if (dev_priv->ips.pwrctx == NULL) |
3666 | dev_priv->ips.pwrctx = intel_alloc_context_page(dev); | |
3667 | if (!dev_priv->ips.pwrctx) { | |
2b4e57bd ED |
3668 | ironlake_teardown_rc6(dev); |
3669 | return -ENOMEM; | |
3670 | } | |
3671 | ||
3672 | return 0; | |
3673 | } | |
3674 | ||
930ebb46 | 3675 | static void ironlake_enable_rc6(struct drm_device *dev) |
2b4e57bd ED |
3676 | { |
3677 | struct drm_i915_private *dev_priv = dev->dev_private; | |
6d90c952 | 3678 | struct intel_ring_buffer *ring = &dev_priv->ring[RCS]; |
3e960501 | 3679 | bool was_interruptible; |
2b4e57bd ED |
3680 | int ret; |
3681 | ||
3682 | /* rc6 disabled by default due to repeated reports of hanging during | |
3683 | * boot and resume. | |
3684 | */ | |
3685 | if (!intel_enable_rc6(dev)) | |
3686 | return; | |
3687 | ||
79f5b2c7 DV |
3688 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
3689 | ||
2b4e57bd | 3690 | ret = ironlake_setup_rc6(dev); |
79f5b2c7 | 3691 | if (ret) |
2b4e57bd | 3692 | return; |
2b4e57bd | 3693 | |
3e960501 CW |
3694 | was_interruptible = dev_priv->mm.interruptible; |
3695 | dev_priv->mm.interruptible = false; | |
3696 | ||
2b4e57bd ED |
3697 | /* |
3698 | * GPU can automatically power down the render unit if given a page | |
3699 | * to save state. | |
3700 | */ | |
6d90c952 | 3701 | ret = intel_ring_begin(ring, 6); |
2b4e57bd ED |
3702 | if (ret) { |
3703 | ironlake_teardown_rc6(dev); | |
3e960501 | 3704 | dev_priv->mm.interruptible = was_interruptible; |
2b4e57bd ED |
3705 | return; |
3706 | } | |
3707 | ||
6d90c952 DV |
3708 | intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN); |
3709 | intel_ring_emit(ring, MI_SET_CONTEXT); | |
3e373948 | 3710 | intel_ring_emit(ring, dev_priv->ips.renderctx->gtt_offset | |
6d90c952 DV |
3711 | MI_MM_SPACE_GTT | |
3712 | MI_SAVE_EXT_STATE_EN | | |
3713 | MI_RESTORE_EXT_STATE_EN | | |
3714 | MI_RESTORE_INHIBIT); | |
3715 | intel_ring_emit(ring, MI_SUSPEND_FLUSH); | |
3716 | intel_ring_emit(ring, MI_NOOP); | |
3717 | intel_ring_emit(ring, MI_FLUSH); | |
3718 | intel_ring_advance(ring); | |
2b4e57bd ED |
3719 | |
3720 | /* | |
3721 | * Wait for the command parser to advance past MI_SET_CONTEXT. The HW | |
3722 | * does an implicit flush, combined with MI_FLUSH above, it should be | |
3723 | * safe to assume that renderctx is valid | |
3724 | */ | |
3e960501 CW |
3725 | ret = intel_ring_idle(ring); |
3726 | dev_priv->mm.interruptible = was_interruptible; | |
2b4e57bd | 3727 | if (ret) { |
def27a58 | 3728 | DRM_ERROR("failed to enable ironlake power savings\n"); |
2b4e57bd | 3729 | ironlake_teardown_rc6(dev); |
2b4e57bd ED |
3730 | return; |
3731 | } | |
3732 | ||
3e373948 | 3733 | I915_WRITE(PWRCTXA, dev_priv->ips.pwrctx->gtt_offset | PWRCTX_EN); |
2b4e57bd | 3734 | I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); |
2b4e57bd ED |
3735 | } |
3736 | ||
dde18883 ED |
3737 | static unsigned long intel_pxfreq(u32 vidfreq) |
3738 | { | |
3739 | unsigned long freq; | |
3740 | int div = (vidfreq & 0x3f0000) >> 16; | |
3741 | int post = (vidfreq & 0x3000) >> 12; | |
3742 | int pre = (vidfreq & 0x7); | |
3743 | ||
3744 | if (!pre) | |
3745 | return 0; | |
3746 | ||
3747 | freq = ((div * 133333) / ((1<<post) * pre)); | |
3748 | ||
3749 | return freq; | |
3750 | } | |
3751 | ||
eb48eb00 DV |
3752 | static const struct cparams { |
3753 | u16 i; | |
3754 | u16 t; | |
3755 | u16 m; | |
3756 | u16 c; | |
3757 | } cparams[] = { | |
3758 | { 1, 1333, 301, 28664 }, | |
3759 | { 1, 1066, 294, 24460 }, | |
3760 | { 1, 800, 294, 25192 }, | |
3761 | { 0, 1333, 276, 27605 }, | |
3762 | { 0, 1066, 276, 27605 }, | |
3763 | { 0, 800, 231, 23784 }, | |
3764 | }; | |
3765 | ||
f531dcb2 | 3766 | static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv) |
eb48eb00 DV |
3767 | { |
3768 | u64 total_count, diff, ret; | |
3769 | u32 count1, count2, count3, m = 0, c = 0; | |
3770 | unsigned long now = jiffies_to_msecs(jiffies), diff1; | |
3771 | int i; | |
3772 | ||
02d71956 DV |
3773 | assert_spin_locked(&mchdev_lock); |
3774 | ||
20e4d407 | 3775 | diff1 = now - dev_priv->ips.last_time1; |
eb48eb00 DV |
3776 | |
3777 | /* Prevent division-by-zero if we are asking too fast. | |
3778 | * Also, we don't get interesting results if we are polling | |
3779 | * faster than once in 10ms, so just return the saved value | |
3780 | * in such cases. | |
3781 | */ | |
3782 | if (diff1 <= 10) | |
20e4d407 | 3783 | return dev_priv->ips.chipset_power; |
eb48eb00 DV |
3784 | |
3785 | count1 = I915_READ(DMIEC); | |
3786 | count2 = I915_READ(DDREC); | |
3787 | count3 = I915_READ(CSIEC); | |
3788 | ||
3789 | total_count = count1 + count2 + count3; | |
3790 | ||
3791 | /* FIXME: handle per-counter overflow */ | |
20e4d407 DV |
3792 | if (total_count < dev_priv->ips.last_count1) { |
3793 | diff = ~0UL - dev_priv->ips.last_count1; | |
eb48eb00 DV |
3794 | diff += total_count; |
3795 | } else { | |
20e4d407 | 3796 | diff = total_count - dev_priv->ips.last_count1; |
eb48eb00 DV |
3797 | } |
3798 | ||
3799 | for (i = 0; i < ARRAY_SIZE(cparams); i++) { | |
20e4d407 DV |
3800 | if (cparams[i].i == dev_priv->ips.c_m && |
3801 | cparams[i].t == dev_priv->ips.r_t) { | |
eb48eb00 DV |
3802 | m = cparams[i].m; |
3803 | c = cparams[i].c; | |
3804 | break; | |
3805 | } | |
3806 | } | |
3807 | ||
3808 | diff = div_u64(diff, diff1); | |
3809 | ret = ((m * diff) + c); | |
3810 | ret = div_u64(ret, 10); | |
3811 | ||
20e4d407 DV |
3812 | dev_priv->ips.last_count1 = total_count; |
3813 | dev_priv->ips.last_time1 = now; | |
eb48eb00 | 3814 | |
20e4d407 | 3815 | dev_priv->ips.chipset_power = ret; |
eb48eb00 DV |
3816 | |
3817 | return ret; | |
3818 | } | |
3819 | ||
f531dcb2 CW |
3820 | unsigned long i915_chipset_val(struct drm_i915_private *dev_priv) |
3821 | { | |
3822 | unsigned long val; | |
3823 | ||
3824 | if (dev_priv->info->gen != 5) | |
3825 | return 0; | |
3826 | ||
3827 | spin_lock_irq(&mchdev_lock); | |
3828 | ||
3829 | val = __i915_chipset_val(dev_priv); | |
3830 | ||
3831 | spin_unlock_irq(&mchdev_lock); | |
3832 | ||
3833 | return val; | |
3834 | } | |
3835 | ||
eb48eb00 DV |
3836 | unsigned long i915_mch_val(struct drm_i915_private *dev_priv) |
3837 | { | |
3838 | unsigned long m, x, b; | |
3839 | u32 tsfs; | |
3840 | ||
3841 | tsfs = I915_READ(TSFS); | |
3842 | ||
3843 | m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT); | |
3844 | x = I915_READ8(TR1); | |
3845 | ||
3846 | b = tsfs & TSFS_INTR_MASK; | |
3847 | ||
3848 | return ((m * x) / 127) - b; | |
3849 | } | |
3850 | ||
3851 | static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid) | |
3852 | { | |
3853 | static const struct v_table { | |
3854 | u16 vd; /* in .1 mil */ | |
3855 | u16 vm; /* in .1 mil */ | |
3856 | } v_table[] = { | |
3857 | { 0, 0, }, | |
3858 | { 375, 0, }, | |
3859 | { 500, 0, }, | |
3860 | { 625, 0, }, | |
3861 | { 750, 0, }, | |
3862 | { 875, 0, }, | |
3863 | { 1000, 0, }, | |
3864 | { 1125, 0, }, | |
3865 | { 4125, 3000, }, | |
3866 | { 4125, 3000, }, | |
3867 | { 4125, 3000, }, | |
3868 | { 4125, 3000, }, | |
3869 | { 4125, 3000, }, | |
3870 | { 4125, 3000, }, | |
3871 | { 4125, 3000, }, | |
3872 | { 4125, 3000, }, | |
3873 | { 4125, 3000, }, | |
3874 | { 4125, 3000, }, | |
3875 | { 4125, 3000, }, | |
3876 | { 4125, 3000, }, | |
3877 | { 4125, 3000, }, | |
3878 | { 4125, 3000, }, | |
3879 | { 4125, 3000, }, | |
3880 | { 4125, 3000, }, | |
3881 | { 4125, 3000, }, | |
3882 | { 4125, 3000, }, | |
3883 | { 4125, 3000, }, | |
3884 | { 4125, 3000, }, | |
3885 | { 4125, 3000, }, | |
3886 | { 4125, 3000, }, | |
3887 | { 4125, 3000, }, | |
3888 | { 4125, 3000, }, | |
3889 | { 4250, 3125, }, | |
3890 | { 4375, 3250, }, | |
3891 | { 4500, 3375, }, | |
3892 | { 4625, 3500, }, | |
3893 | { 4750, 3625, }, | |
3894 | { 4875, 3750, }, | |
3895 | { 5000, 3875, }, | |
3896 | { 5125, 4000, }, | |
3897 | { 5250, 4125, }, | |
3898 | { 5375, 4250, }, | |
3899 | { 5500, 4375, }, | |
3900 | { 5625, 4500, }, | |
3901 | { 5750, 4625, }, | |
3902 | { 5875, 4750, }, | |
3903 | { 6000, 4875, }, | |
3904 | { 6125, 5000, }, | |
3905 | { 6250, 5125, }, | |
3906 | { 6375, 5250, }, | |
3907 | { 6500, 5375, }, | |
3908 | { 6625, 5500, }, | |
3909 | { 6750, 5625, }, | |
3910 | { 6875, 5750, }, | |
3911 | { 7000, 5875, }, | |
3912 | { 7125, 6000, }, | |
3913 | { 7250, 6125, }, | |
3914 | { 7375, 6250, }, | |
3915 | { 7500, 6375, }, | |
3916 | { 7625, 6500, }, | |
3917 | { 7750, 6625, }, | |
3918 | { 7875, 6750, }, | |
3919 | { 8000, 6875, }, | |
3920 | { 8125, 7000, }, | |
3921 | { 8250, 7125, }, | |
3922 | { 8375, 7250, }, | |
3923 | { 8500, 7375, }, | |
3924 | { 8625, 7500, }, | |
3925 | { 8750, 7625, }, | |
3926 | { 8875, 7750, }, | |
3927 | { 9000, 7875, }, | |
3928 | { 9125, 8000, }, | |
3929 | { 9250, 8125, }, | |
3930 | { 9375, 8250, }, | |
3931 | { 9500, 8375, }, | |
3932 | { 9625, 8500, }, | |
3933 | { 9750, 8625, }, | |
3934 | { 9875, 8750, }, | |
3935 | { 10000, 8875, }, | |
3936 | { 10125, 9000, }, | |
3937 | { 10250, 9125, }, | |
3938 | { 10375, 9250, }, | |
3939 | { 10500, 9375, }, | |
3940 | { 10625, 9500, }, | |
3941 | { 10750, 9625, }, | |
3942 | { 10875, 9750, }, | |
3943 | { 11000, 9875, }, | |
3944 | { 11125, 10000, }, | |
3945 | { 11250, 10125, }, | |
3946 | { 11375, 10250, }, | |
3947 | { 11500, 10375, }, | |
3948 | { 11625, 10500, }, | |
3949 | { 11750, 10625, }, | |
3950 | { 11875, 10750, }, | |
3951 | { 12000, 10875, }, | |
3952 | { 12125, 11000, }, | |
3953 | { 12250, 11125, }, | |
3954 | { 12375, 11250, }, | |
3955 | { 12500, 11375, }, | |
3956 | { 12625, 11500, }, | |
3957 | { 12750, 11625, }, | |
3958 | { 12875, 11750, }, | |
3959 | { 13000, 11875, }, | |
3960 | { 13125, 12000, }, | |
3961 | { 13250, 12125, }, | |
3962 | { 13375, 12250, }, | |
3963 | { 13500, 12375, }, | |
3964 | { 13625, 12500, }, | |
3965 | { 13750, 12625, }, | |
3966 | { 13875, 12750, }, | |
3967 | { 14000, 12875, }, | |
3968 | { 14125, 13000, }, | |
3969 | { 14250, 13125, }, | |
3970 | { 14375, 13250, }, | |
3971 | { 14500, 13375, }, | |
3972 | { 14625, 13500, }, | |
3973 | { 14750, 13625, }, | |
3974 | { 14875, 13750, }, | |
3975 | { 15000, 13875, }, | |
3976 | { 15125, 14000, }, | |
3977 | { 15250, 14125, }, | |
3978 | { 15375, 14250, }, | |
3979 | { 15500, 14375, }, | |
3980 | { 15625, 14500, }, | |
3981 | { 15750, 14625, }, | |
3982 | { 15875, 14750, }, | |
3983 | { 16000, 14875, }, | |
3984 | { 16125, 15000, }, | |
3985 | }; | |
3986 | if (dev_priv->info->is_mobile) | |
3987 | return v_table[pxvid].vm; | |
3988 | else | |
3989 | return v_table[pxvid].vd; | |
3990 | } | |
3991 | ||
02d71956 | 3992 | static void __i915_update_gfx_val(struct drm_i915_private *dev_priv) |
eb48eb00 DV |
3993 | { |
3994 | struct timespec now, diff1; | |
3995 | u64 diff; | |
3996 | unsigned long diffms; | |
3997 | u32 count; | |
3998 | ||
02d71956 | 3999 | assert_spin_locked(&mchdev_lock); |
eb48eb00 DV |
4000 | |
4001 | getrawmonotonic(&now); | |
20e4d407 | 4002 | diff1 = timespec_sub(now, dev_priv->ips.last_time2); |
eb48eb00 DV |
4003 | |
4004 | /* Don't divide by 0 */ | |
4005 | diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000; | |
4006 | if (!diffms) | |
4007 | return; | |
4008 | ||
4009 | count = I915_READ(GFXEC); | |
4010 | ||
20e4d407 DV |
4011 | if (count < dev_priv->ips.last_count2) { |
4012 | diff = ~0UL - dev_priv->ips.last_count2; | |
eb48eb00 DV |
4013 | diff += count; |
4014 | } else { | |
20e4d407 | 4015 | diff = count - dev_priv->ips.last_count2; |
eb48eb00 DV |
4016 | } |
4017 | ||
20e4d407 DV |
4018 | dev_priv->ips.last_count2 = count; |
4019 | dev_priv->ips.last_time2 = now; | |
eb48eb00 DV |
4020 | |
4021 | /* More magic constants... */ | |
4022 | diff = diff * 1181; | |
4023 | diff = div_u64(diff, diffms * 10); | |
20e4d407 | 4024 | dev_priv->ips.gfx_power = diff; |
eb48eb00 DV |
4025 | } |
4026 | ||
02d71956 DV |
4027 | void i915_update_gfx_val(struct drm_i915_private *dev_priv) |
4028 | { | |
4029 | if (dev_priv->info->gen != 5) | |
4030 | return; | |
4031 | ||
9270388e | 4032 | spin_lock_irq(&mchdev_lock); |
02d71956 DV |
4033 | |
4034 | __i915_update_gfx_val(dev_priv); | |
4035 | ||
9270388e | 4036 | spin_unlock_irq(&mchdev_lock); |
02d71956 DV |
4037 | } |
4038 | ||
f531dcb2 | 4039 | static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv) |
eb48eb00 DV |
4040 | { |
4041 | unsigned long t, corr, state1, corr2, state2; | |
4042 | u32 pxvid, ext_v; | |
4043 | ||
02d71956 DV |
4044 | assert_spin_locked(&mchdev_lock); |
4045 | ||
c6a828d3 | 4046 | pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4)); |
eb48eb00 DV |
4047 | pxvid = (pxvid >> 24) & 0x7f; |
4048 | ext_v = pvid_to_extvid(dev_priv, pxvid); | |
4049 | ||
4050 | state1 = ext_v; | |
4051 | ||
4052 | t = i915_mch_val(dev_priv); | |
4053 | ||
4054 | /* Revel in the empirically derived constants */ | |
4055 | ||
4056 | /* Correction factor in 1/100000 units */ | |
4057 | if (t > 80) | |
4058 | corr = ((t * 2349) + 135940); | |
4059 | else if (t >= 50) | |
4060 | corr = ((t * 964) + 29317); | |
4061 | else /* < 50 */ | |
4062 | corr = ((t * 301) + 1004); | |
4063 | ||
4064 | corr = corr * ((150142 * state1) / 10000 - 78642); | |
4065 | corr /= 100000; | |
20e4d407 | 4066 | corr2 = (corr * dev_priv->ips.corr); |
eb48eb00 DV |
4067 | |
4068 | state2 = (corr2 * state1) / 10000; | |
4069 | state2 /= 100; /* convert to mW */ | |
4070 | ||
02d71956 | 4071 | __i915_update_gfx_val(dev_priv); |
eb48eb00 | 4072 | |
20e4d407 | 4073 | return dev_priv->ips.gfx_power + state2; |
eb48eb00 DV |
4074 | } |
4075 | ||
f531dcb2 CW |
4076 | unsigned long i915_gfx_val(struct drm_i915_private *dev_priv) |
4077 | { | |
4078 | unsigned long val; | |
4079 | ||
4080 | if (dev_priv->info->gen != 5) | |
4081 | return 0; | |
4082 | ||
4083 | spin_lock_irq(&mchdev_lock); | |
4084 | ||
4085 | val = __i915_gfx_val(dev_priv); | |
4086 | ||
4087 | spin_unlock_irq(&mchdev_lock); | |
4088 | ||
4089 | return val; | |
4090 | } | |
4091 | ||
eb48eb00 DV |
4092 | /** |
4093 | * i915_read_mch_val - return value for IPS use | |
4094 | * | |
4095 | * Calculate and return a value for the IPS driver to use when deciding whether | |
4096 | * we have thermal and power headroom to increase CPU or GPU power budget. | |
4097 | */ | |
4098 | unsigned long i915_read_mch_val(void) | |
4099 | { | |
4100 | struct drm_i915_private *dev_priv; | |
4101 | unsigned long chipset_val, graphics_val, ret = 0; | |
4102 | ||
9270388e | 4103 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
4104 | if (!i915_mch_dev) |
4105 | goto out_unlock; | |
4106 | dev_priv = i915_mch_dev; | |
4107 | ||
f531dcb2 CW |
4108 | chipset_val = __i915_chipset_val(dev_priv); |
4109 | graphics_val = __i915_gfx_val(dev_priv); | |
eb48eb00 DV |
4110 | |
4111 | ret = chipset_val + graphics_val; | |
4112 | ||
4113 | out_unlock: | |
9270388e | 4114 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
4115 | |
4116 | return ret; | |
4117 | } | |
4118 | EXPORT_SYMBOL_GPL(i915_read_mch_val); | |
4119 | ||
4120 | /** | |
4121 | * i915_gpu_raise - raise GPU frequency limit | |
4122 | * | |
4123 | * Raise the limit; IPS indicates we have thermal headroom. | |
4124 | */ | |
4125 | bool i915_gpu_raise(void) | |
4126 | { | |
4127 | struct drm_i915_private *dev_priv; | |
4128 | bool ret = true; | |
4129 | ||
9270388e | 4130 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
4131 | if (!i915_mch_dev) { |
4132 | ret = false; | |
4133 | goto out_unlock; | |
4134 | } | |
4135 | dev_priv = i915_mch_dev; | |
4136 | ||
20e4d407 DV |
4137 | if (dev_priv->ips.max_delay > dev_priv->ips.fmax) |
4138 | dev_priv->ips.max_delay--; | |
eb48eb00 DV |
4139 | |
4140 | out_unlock: | |
9270388e | 4141 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
4142 | |
4143 | return ret; | |
4144 | } | |
4145 | EXPORT_SYMBOL_GPL(i915_gpu_raise); | |
4146 | ||
4147 | /** | |
4148 | * i915_gpu_lower - lower GPU frequency limit | |
4149 | * | |
4150 | * IPS indicates we're close to a thermal limit, so throttle back the GPU | |
4151 | * frequency maximum. | |
4152 | */ | |
4153 | bool i915_gpu_lower(void) | |
4154 | { | |
4155 | struct drm_i915_private *dev_priv; | |
4156 | bool ret = true; | |
4157 | ||
9270388e | 4158 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
4159 | if (!i915_mch_dev) { |
4160 | ret = false; | |
4161 | goto out_unlock; | |
4162 | } | |
4163 | dev_priv = i915_mch_dev; | |
4164 | ||
20e4d407 DV |
4165 | if (dev_priv->ips.max_delay < dev_priv->ips.min_delay) |
4166 | dev_priv->ips.max_delay++; | |
eb48eb00 DV |
4167 | |
4168 | out_unlock: | |
9270388e | 4169 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
4170 | |
4171 | return ret; | |
4172 | } | |
4173 | EXPORT_SYMBOL_GPL(i915_gpu_lower); | |
4174 | ||
4175 | /** | |
4176 | * i915_gpu_busy - indicate GPU business to IPS | |
4177 | * | |
4178 | * Tell the IPS driver whether or not the GPU is busy. | |
4179 | */ | |
4180 | bool i915_gpu_busy(void) | |
4181 | { | |
4182 | struct drm_i915_private *dev_priv; | |
f047e395 | 4183 | struct intel_ring_buffer *ring; |
eb48eb00 | 4184 | bool ret = false; |
f047e395 | 4185 | int i; |
eb48eb00 | 4186 | |
9270388e | 4187 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
4188 | if (!i915_mch_dev) |
4189 | goto out_unlock; | |
4190 | dev_priv = i915_mch_dev; | |
4191 | ||
f047e395 CW |
4192 | for_each_ring(ring, dev_priv, i) |
4193 | ret |= !list_empty(&ring->request_list); | |
eb48eb00 DV |
4194 | |
4195 | out_unlock: | |
9270388e | 4196 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
4197 | |
4198 | return ret; | |
4199 | } | |
4200 | EXPORT_SYMBOL_GPL(i915_gpu_busy); | |
4201 | ||
4202 | /** | |
4203 | * i915_gpu_turbo_disable - disable graphics turbo | |
4204 | * | |
4205 | * Disable graphics turbo by resetting the max frequency and setting the | |
4206 | * current frequency to the default. | |
4207 | */ | |
4208 | bool i915_gpu_turbo_disable(void) | |
4209 | { | |
4210 | struct drm_i915_private *dev_priv; | |
4211 | bool ret = true; | |
4212 | ||
9270388e | 4213 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
4214 | if (!i915_mch_dev) { |
4215 | ret = false; | |
4216 | goto out_unlock; | |
4217 | } | |
4218 | dev_priv = i915_mch_dev; | |
4219 | ||
20e4d407 | 4220 | dev_priv->ips.max_delay = dev_priv->ips.fstart; |
eb48eb00 | 4221 | |
20e4d407 | 4222 | if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart)) |
eb48eb00 DV |
4223 | ret = false; |
4224 | ||
4225 | out_unlock: | |
9270388e | 4226 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
4227 | |
4228 | return ret; | |
4229 | } | |
4230 | EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); | |
4231 | ||
4232 | /** | |
4233 | * Tells the intel_ips driver that the i915 driver is now loaded, if | |
4234 | * IPS got loaded first. | |
4235 | * | |
4236 | * This awkward dance is so that neither module has to depend on the | |
4237 | * other in order for IPS to do the appropriate communication of | |
4238 | * GPU turbo limits to i915. | |
4239 | */ | |
4240 | static void | |
4241 | ips_ping_for_i915_load(void) | |
4242 | { | |
4243 | void (*link)(void); | |
4244 | ||
4245 | link = symbol_get(ips_link_to_i915_driver); | |
4246 | if (link) { | |
4247 | link(); | |
4248 | symbol_put(ips_link_to_i915_driver); | |
4249 | } | |
4250 | } | |
4251 | ||
4252 | void intel_gpu_ips_init(struct drm_i915_private *dev_priv) | |
4253 | { | |
02d71956 DV |
4254 | /* We only register the i915 ips part with intel-ips once everything is |
4255 | * set up, to avoid intel-ips sneaking in and reading bogus values. */ | |
9270388e | 4256 | spin_lock_irq(&mchdev_lock); |
eb48eb00 | 4257 | i915_mch_dev = dev_priv; |
9270388e | 4258 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
4259 | |
4260 | ips_ping_for_i915_load(); | |
4261 | } | |
4262 | ||
4263 | void intel_gpu_ips_teardown(void) | |
4264 | { | |
9270388e | 4265 | spin_lock_irq(&mchdev_lock); |
eb48eb00 | 4266 | i915_mch_dev = NULL; |
9270388e | 4267 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 | 4268 | } |
8090c6b9 | 4269 | static void intel_init_emon(struct drm_device *dev) |
dde18883 ED |
4270 | { |
4271 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4272 | u32 lcfuse; | |
4273 | u8 pxw[16]; | |
4274 | int i; | |
4275 | ||
4276 | /* Disable to program */ | |
4277 | I915_WRITE(ECR, 0); | |
4278 | POSTING_READ(ECR); | |
4279 | ||
4280 | /* Program energy weights for various events */ | |
4281 | I915_WRITE(SDEW, 0x15040d00); | |
4282 | I915_WRITE(CSIEW0, 0x007f0000); | |
4283 | I915_WRITE(CSIEW1, 0x1e220004); | |
4284 | I915_WRITE(CSIEW2, 0x04000004); | |
4285 | ||
4286 | for (i = 0; i < 5; i++) | |
4287 | I915_WRITE(PEW + (i * 4), 0); | |
4288 | for (i = 0; i < 3; i++) | |
4289 | I915_WRITE(DEW + (i * 4), 0); | |
4290 | ||
4291 | /* Program P-state weights to account for frequency power adjustment */ | |
4292 | for (i = 0; i < 16; i++) { | |
4293 | u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4)); | |
4294 | unsigned long freq = intel_pxfreq(pxvidfreq); | |
4295 | unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >> | |
4296 | PXVFREQ_PX_SHIFT; | |
4297 | unsigned long val; | |
4298 | ||
4299 | val = vid * vid; | |
4300 | val *= (freq / 1000); | |
4301 | val *= 255; | |
4302 | val /= (127*127*900); | |
4303 | if (val > 0xff) | |
4304 | DRM_ERROR("bad pxval: %ld\n", val); | |
4305 | pxw[i] = val; | |
4306 | } | |
4307 | /* Render standby states get 0 weight */ | |
4308 | pxw[14] = 0; | |
4309 | pxw[15] = 0; | |
4310 | ||
4311 | for (i = 0; i < 4; i++) { | |
4312 | u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) | | |
4313 | (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]); | |
4314 | I915_WRITE(PXW + (i * 4), val); | |
4315 | } | |
4316 | ||
4317 | /* Adjust magic regs to magic values (more experimental results) */ | |
4318 | I915_WRITE(OGW0, 0); | |
4319 | I915_WRITE(OGW1, 0); | |
4320 | I915_WRITE(EG0, 0x00007f00); | |
4321 | I915_WRITE(EG1, 0x0000000e); | |
4322 | I915_WRITE(EG2, 0x000e0000); | |
4323 | I915_WRITE(EG3, 0x68000300); | |
4324 | I915_WRITE(EG4, 0x42000000); | |
4325 | I915_WRITE(EG5, 0x00140031); | |
4326 | I915_WRITE(EG6, 0); | |
4327 | I915_WRITE(EG7, 0); | |
4328 | ||
4329 | for (i = 0; i < 8; i++) | |
4330 | I915_WRITE(PXWL + (i * 4), 0); | |
4331 | ||
4332 | /* Enable PMON + select events */ | |
4333 | I915_WRITE(ECR, 0x80000019); | |
4334 | ||
4335 | lcfuse = I915_READ(LCFUSE02); | |
4336 | ||
20e4d407 | 4337 | dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK); |
dde18883 ED |
4338 | } |
4339 | ||
8090c6b9 DV |
4340 | void intel_disable_gt_powersave(struct drm_device *dev) |
4341 | { | |
1a01ab3b JB |
4342 | struct drm_i915_private *dev_priv = dev->dev_private; |
4343 | ||
fd0c0642 DV |
4344 | /* Interrupts should be disabled already to avoid re-arming. */ |
4345 | WARN_ON(dev->irq_enabled); | |
4346 | ||
930ebb46 | 4347 | if (IS_IRONLAKE_M(dev)) { |
8090c6b9 | 4348 | ironlake_disable_drps(dev); |
930ebb46 | 4349 | ironlake_disable_rc6(dev); |
0a073b84 | 4350 | } else if (INTEL_INFO(dev)->gen >= 6) { |
1a01ab3b | 4351 | cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work); |
250848ca | 4352 | cancel_work_sync(&dev_priv->rps.work); |
52ceb908 JB |
4353 | if (IS_VALLEYVIEW(dev)) |
4354 | cancel_delayed_work_sync(&dev_priv->rps.vlv_work); | |
4fc688ce | 4355 | mutex_lock(&dev_priv->rps.hw_lock); |
d20d4f0c JB |
4356 | if (IS_VALLEYVIEW(dev)) |
4357 | valleyview_disable_rps(dev); | |
4358 | else | |
4359 | gen6_disable_rps(dev); | |
4fc688ce | 4360 | mutex_unlock(&dev_priv->rps.hw_lock); |
930ebb46 | 4361 | } |
8090c6b9 DV |
4362 | } |
4363 | ||
1a01ab3b JB |
4364 | static void intel_gen6_powersave_work(struct work_struct *work) |
4365 | { | |
4366 | struct drm_i915_private *dev_priv = | |
4367 | container_of(work, struct drm_i915_private, | |
4368 | rps.delayed_resume_work.work); | |
4369 | struct drm_device *dev = dev_priv->dev; | |
4370 | ||
4fc688ce | 4371 | mutex_lock(&dev_priv->rps.hw_lock); |
0a073b84 JB |
4372 | |
4373 | if (IS_VALLEYVIEW(dev)) { | |
4374 | valleyview_enable_rps(dev); | |
4375 | } else { | |
4376 | gen6_enable_rps(dev); | |
4377 | gen6_update_ring_freq(dev); | |
4378 | } | |
4fc688ce | 4379 | mutex_unlock(&dev_priv->rps.hw_lock); |
1a01ab3b JB |
4380 | } |
4381 | ||
8090c6b9 DV |
4382 | void intel_enable_gt_powersave(struct drm_device *dev) |
4383 | { | |
1a01ab3b JB |
4384 | struct drm_i915_private *dev_priv = dev->dev_private; |
4385 | ||
8090c6b9 DV |
4386 | if (IS_IRONLAKE_M(dev)) { |
4387 | ironlake_enable_drps(dev); | |
4388 | ironlake_enable_rc6(dev); | |
4389 | intel_init_emon(dev); | |
0a073b84 | 4390 | } else if (IS_GEN6(dev) || IS_GEN7(dev)) { |
1a01ab3b JB |
4391 | /* |
4392 | * PCU communication is slow and this doesn't need to be | |
4393 | * done at any specific time, so do this out of our fast path | |
4394 | * to make resume and init faster. | |
4395 | */ | |
4396 | schedule_delayed_work(&dev_priv->rps.delayed_resume_work, | |
4397 | round_jiffies_up_relative(HZ)); | |
8090c6b9 DV |
4398 | } |
4399 | } | |
4400 | ||
3107bd48 DV |
4401 | static void ibx_init_clock_gating(struct drm_device *dev) |
4402 | { | |
4403 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4404 | ||
4405 | /* | |
4406 | * On Ibex Peak and Cougar Point, we need to disable clock | |
4407 | * gating for the panel power sequencer or it will fail to | |
4408 | * start up when no ports are active. | |
4409 | */ | |
4410 | I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); | |
4411 | } | |
4412 | ||
0e088b8f VS |
4413 | static void g4x_disable_trickle_feed(struct drm_device *dev) |
4414 | { | |
4415 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4416 | int pipe; | |
4417 | ||
4418 | for_each_pipe(pipe) { | |
4419 | I915_WRITE(DSPCNTR(pipe), | |
4420 | I915_READ(DSPCNTR(pipe)) | | |
4421 | DISPPLANE_TRICKLE_FEED_DISABLE); | |
4422 | intel_flush_display_plane(dev_priv, pipe); | |
4423 | } | |
4424 | } | |
4425 | ||
1fa61106 | 4426 | static void ironlake_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4427 | { |
4428 | struct drm_i915_private *dev_priv = dev->dev_private; | |
231e54f6 | 4429 | uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; |
6f1d69b0 ED |
4430 | |
4431 | /* Required for FBC */ | |
4d47e4f5 DL |
4432 | dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE | |
4433 | ILK_DPFCUNIT_CLOCK_GATE_DISABLE | | |
4434 | ILK_DPFDUNIT_CLOCK_GATE_ENABLE; | |
6f1d69b0 ED |
4435 | |
4436 | I915_WRITE(PCH_3DCGDIS0, | |
4437 | MARIUNIT_CLOCK_GATE_DISABLE | | |
4438 | SVSMUNIT_CLOCK_GATE_DISABLE); | |
4439 | I915_WRITE(PCH_3DCGDIS1, | |
4440 | VFMUNIT_CLOCK_GATE_DISABLE); | |
4441 | ||
6f1d69b0 ED |
4442 | /* |
4443 | * According to the spec the following bits should be set in | |
4444 | * order to enable memory self-refresh | |
4445 | * The bit 22/21 of 0x42004 | |
4446 | * The bit 5 of 0x42020 | |
4447 | * The bit 15 of 0x45000 | |
4448 | */ | |
4449 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
4450 | (I915_READ(ILK_DISPLAY_CHICKEN2) | | |
4451 | ILK_DPARB_GATE | ILK_VSDPFD_FULL)); | |
4d47e4f5 | 4452 | dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE; |
6f1d69b0 ED |
4453 | I915_WRITE(DISP_ARB_CTL, |
4454 | (I915_READ(DISP_ARB_CTL) | | |
4455 | DISP_FBC_WM_DIS)); | |
4456 | I915_WRITE(WM3_LP_ILK, 0); | |
4457 | I915_WRITE(WM2_LP_ILK, 0); | |
4458 | I915_WRITE(WM1_LP_ILK, 0); | |
4459 | ||
4460 | /* | |
4461 | * Based on the document from hardware guys the following bits | |
4462 | * should be set unconditionally in order to enable FBC. | |
4463 | * The bit 22 of 0x42000 | |
4464 | * The bit 22 of 0x42004 | |
4465 | * The bit 7,8,9 of 0x42020. | |
4466 | */ | |
4467 | if (IS_IRONLAKE_M(dev)) { | |
4468 | I915_WRITE(ILK_DISPLAY_CHICKEN1, | |
4469 | I915_READ(ILK_DISPLAY_CHICKEN1) | | |
4470 | ILK_FBCQ_DIS); | |
4471 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
4472 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
4473 | ILK_DPARB_GATE); | |
6f1d69b0 ED |
4474 | } |
4475 | ||
4d47e4f5 DL |
4476 | I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); |
4477 | ||
6f1d69b0 ED |
4478 | I915_WRITE(ILK_DISPLAY_CHICKEN2, |
4479 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
4480 | ILK_ELPIN_409_SELECT); | |
4481 | I915_WRITE(_3D_CHICKEN2, | |
4482 | _3D_CHICKEN2_WM_READ_PIPELINED << 16 | | |
4483 | _3D_CHICKEN2_WM_READ_PIPELINED); | |
4358a374 | 4484 | |
ecdb4eb7 | 4485 | /* WaDisableRenderCachePipelinedFlush:ilk */ |
4358a374 DV |
4486 | I915_WRITE(CACHE_MODE_0, |
4487 | _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); | |
3107bd48 | 4488 | |
0e088b8f | 4489 | g4x_disable_trickle_feed(dev); |
bdad2b2f | 4490 | |
3107bd48 DV |
4491 | ibx_init_clock_gating(dev); |
4492 | } | |
4493 | ||
4494 | static void cpt_init_clock_gating(struct drm_device *dev) | |
4495 | { | |
4496 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4497 | int pipe; | |
3f704fa2 | 4498 | uint32_t val; |
3107bd48 DV |
4499 | |
4500 | /* | |
4501 | * On Ibex Peak and Cougar Point, we need to disable clock | |
4502 | * gating for the panel power sequencer or it will fail to | |
4503 | * start up when no ports are active. | |
4504 | */ | |
4505 | I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); | |
4506 | I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) | | |
4507 | DPLS_EDP_PPS_FIX_DIS); | |
335c07b7 TI |
4508 | /* The below fixes the weird display corruption, a few pixels shifted |
4509 | * downward, on (only) LVDS of some HP laptops with IVY. | |
4510 | */ | |
3f704fa2 | 4511 | for_each_pipe(pipe) { |
dc4bd2d1 PZ |
4512 | val = I915_READ(TRANS_CHICKEN2(pipe)); |
4513 | val |= TRANS_CHICKEN2_TIMING_OVERRIDE; | |
4514 | val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED; | |
41aa3448 | 4515 | if (dev_priv->vbt.fdi_rx_polarity_inverted) |
3f704fa2 | 4516 | val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED; |
dc4bd2d1 PZ |
4517 | val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK; |
4518 | val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER; | |
4519 | val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH; | |
3f704fa2 PZ |
4520 | I915_WRITE(TRANS_CHICKEN2(pipe), val); |
4521 | } | |
3107bd48 DV |
4522 | /* WADP0ClockGatingDisable */ |
4523 | for_each_pipe(pipe) { | |
4524 | I915_WRITE(TRANS_CHICKEN1(pipe), | |
4525 | TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); | |
4526 | } | |
6f1d69b0 ED |
4527 | } |
4528 | ||
1d7aaa0c DV |
4529 | static void gen6_check_mch_setup(struct drm_device *dev) |
4530 | { | |
4531 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4532 | uint32_t tmp; | |
4533 | ||
4534 | tmp = I915_READ(MCH_SSKPD); | |
4535 | if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) { | |
4536 | DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp); | |
4537 | DRM_INFO("This can cause pipe underruns and display issues.\n"); | |
4538 | DRM_INFO("Please upgrade your BIOS to fix this.\n"); | |
4539 | } | |
4540 | } | |
4541 | ||
1fa61106 | 4542 | static void gen6_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4543 | { |
4544 | struct drm_i915_private *dev_priv = dev->dev_private; | |
231e54f6 | 4545 | uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; |
6f1d69b0 | 4546 | |
231e54f6 | 4547 | I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); |
6f1d69b0 ED |
4548 | |
4549 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
4550 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
4551 | ILK_ELPIN_409_SELECT); | |
4552 | ||
ecdb4eb7 | 4553 | /* WaDisableHiZPlanesWhenMSAAEnabled:snb */ |
4283908e DV |
4554 | I915_WRITE(_3D_CHICKEN, |
4555 | _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB)); | |
4556 | ||
ecdb4eb7 | 4557 | /* WaSetupGtModeTdRowDispatch:snb */ |
6547fbdb DV |
4558 | if (IS_SNB_GT1(dev)) |
4559 | I915_WRITE(GEN6_GT_MODE, | |
4560 | _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE)); | |
4561 | ||
6f1d69b0 ED |
4562 | I915_WRITE(WM3_LP_ILK, 0); |
4563 | I915_WRITE(WM2_LP_ILK, 0); | |
4564 | I915_WRITE(WM1_LP_ILK, 0); | |
4565 | ||
6f1d69b0 | 4566 | I915_WRITE(CACHE_MODE_0, |
50743298 | 4567 | _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB)); |
6f1d69b0 ED |
4568 | |
4569 | I915_WRITE(GEN6_UCGCTL1, | |
4570 | I915_READ(GEN6_UCGCTL1) | | |
4571 | GEN6_BLBUNIT_CLOCK_GATE_DISABLE | | |
4572 | GEN6_CSUNIT_CLOCK_GATE_DISABLE); | |
4573 | ||
4574 | /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock | |
4575 | * gating disable must be set. Failure to set it results in | |
4576 | * flickering pixels due to Z write ordering failures after | |
4577 | * some amount of runtime in the Mesa "fire" demo, and Unigine | |
4578 | * Sanctuary and Tropics, and apparently anything else with | |
4579 | * alpha test or pixel discard. | |
4580 | * | |
4581 | * According to the spec, bit 11 (RCCUNIT) must also be set, | |
4582 | * but we didn't debug actual testcases to find it out. | |
0f846f81 | 4583 | * |
ecdb4eb7 DL |
4584 | * Also apply WaDisableVDSUnitClockGating:snb and |
4585 | * WaDisableRCPBUnitClockGating:snb. | |
6f1d69b0 ED |
4586 | */ |
4587 | I915_WRITE(GEN6_UCGCTL2, | |
0f846f81 | 4588 | GEN7_VDSUNIT_CLOCK_GATE_DISABLE | |
6f1d69b0 ED |
4589 | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | |
4590 | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); | |
4591 | ||
4592 | /* Bspec says we need to always set all mask bits. */ | |
26b6e44a KG |
4593 | I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) | |
4594 | _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL); | |
6f1d69b0 ED |
4595 | |
4596 | /* | |
4597 | * According to the spec the following bits should be | |
4598 | * set in order to enable memory self-refresh and fbc: | |
4599 | * The bit21 and bit22 of 0x42000 | |
4600 | * The bit21 and bit22 of 0x42004 | |
4601 | * The bit5 and bit7 of 0x42020 | |
4602 | * The bit14 of 0x70180 | |
4603 | * The bit14 of 0x71180 | |
4604 | */ | |
4605 | I915_WRITE(ILK_DISPLAY_CHICKEN1, | |
4606 | I915_READ(ILK_DISPLAY_CHICKEN1) | | |
4607 | ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS); | |
4608 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
4609 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
4610 | ILK_DPARB_GATE | ILK_VSDPFD_FULL); | |
231e54f6 DL |
4611 | I915_WRITE(ILK_DSPCLK_GATE_D, |
4612 | I915_READ(ILK_DSPCLK_GATE_D) | | |
4613 | ILK_DPARBUNIT_CLOCK_GATE_ENABLE | | |
4614 | ILK_DPFDUNIT_CLOCK_GATE_ENABLE); | |
6f1d69b0 | 4615 | |
ecdb4eb7 | 4616 | /* WaMbcDriverBootEnable:snb */ |
b4ae3f22 JB |
4617 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
4618 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
4619 | ||
0e088b8f | 4620 | g4x_disable_trickle_feed(dev); |
f8f2ac9a BW |
4621 | |
4622 | /* The default value should be 0x200 according to docs, but the two | |
4623 | * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */ | |
4624 | I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff)); | |
4625 | I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI)); | |
3107bd48 DV |
4626 | |
4627 | cpt_init_clock_gating(dev); | |
1d7aaa0c DV |
4628 | |
4629 | gen6_check_mch_setup(dev); | |
6f1d69b0 ED |
4630 | } |
4631 | ||
4632 | static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv) | |
4633 | { | |
4634 | uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE); | |
4635 | ||
4636 | reg &= ~GEN7_FF_SCHED_MASK; | |
4637 | reg |= GEN7_FF_TS_SCHED_HW; | |
4638 | reg |= GEN7_FF_VS_SCHED_HW; | |
4639 | reg |= GEN7_FF_DS_SCHED_HW; | |
4640 | ||
41c0b3a8 BW |
4641 | if (IS_HASWELL(dev_priv->dev)) |
4642 | reg &= ~GEN7_FF_VS_REF_CNT_FFME; | |
4643 | ||
6f1d69b0 ED |
4644 | I915_WRITE(GEN7_FF_THREAD_MODE, reg); |
4645 | } | |
4646 | ||
17a303ec PZ |
4647 | static void lpt_init_clock_gating(struct drm_device *dev) |
4648 | { | |
4649 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4650 | ||
4651 | /* | |
4652 | * TODO: this bit should only be enabled when really needed, then | |
4653 | * disabled when not needed anymore in order to save power. | |
4654 | */ | |
4655 | if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) | |
4656 | I915_WRITE(SOUTH_DSPCLK_GATE_D, | |
4657 | I915_READ(SOUTH_DSPCLK_GATE_D) | | |
4658 | PCH_LP_PARTITION_LEVEL_DISABLE); | |
0a790cdb PZ |
4659 | |
4660 | /* WADPOClockGatingDisable:hsw */ | |
4661 | I915_WRITE(_TRANSA_CHICKEN1, | |
4662 | I915_READ(_TRANSA_CHICKEN1) | | |
4663 | TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); | |
17a303ec PZ |
4664 | } |
4665 | ||
7d708ee4 ID |
4666 | static void lpt_suspend_hw(struct drm_device *dev) |
4667 | { | |
4668 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4669 | ||
4670 | if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) { | |
4671 | uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D); | |
4672 | ||
4673 | val &= ~PCH_LP_PARTITION_LEVEL_DISABLE; | |
4674 | I915_WRITE(SOUTH_DSPCLK_GATE_D, val); | |
4675 | } | |
4676 | } | |
4677 | ||
cad2a2d7 ED |
4678 | static void haswell_init_clock_gating(struct drm_device *dev) |
4679 | { | |
4680 | struct drm_i915_private *dev_priv = dev->dev_private; | |
cad2a2d7 ED |
4681 | |
4682 | I915_WRITE(WM3_LP_ILK, 0); | |
4683 | I915_WRITE(WM2_LP_ILK, 0); | |
4684 | I915_WRITE(WM1_LP_ILK, 0); | |
4685 | ||
4686 | /* According to the spec, bit 13 (RCZUNIT) must be set on IVB. | |
ecdb4eb7 | 4687 | * This implements the WaDisableRCZUnitClockGating:hsw workaround. |
cad2a2d7 ED |
4688 | */ |
4689 | I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); | |
4690 | ||
ecdb4eb7 | 4691 | /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */ |
cad2a2d7 ED |
4692 | I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, |
4693 | GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); | |
4694 | ||
ecdb4eb7 | 4695 | /* WaApplyL3ControlAndL3ChickenMode:hsw */ |
cad2a2d7 ED |
4696 | I915_WRITE(GEN7_L3CNTLREG1, |
4697 | GEN7_WA_FOR_GEN7_L3_CONTROL); | |
4698 | I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, | |
4699 | GEN7_WA_L3_CHICKEN_MODE); | |
4700 | ||
ecdb4eb7 | 4701 | /* This is required by WaCatErrorRejectionIssue:hsw */ |
cad2a2d7 ED |
4702 | I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, |
4703 | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | | |
4704 | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); | |
4705 | ||
0e088b8f | 4706 | g4x_disable_trickle_feed(dev); |
cad2a2d7 | 4707 | |
ecdb4eb7 | 4708 | /* WaVSRefCountFullforceMissDisable:hsw */ |
cad2a2d7 ED |
4709 | gen7_setup_fixed_func_scheduler(dev_priv); |
4710 | ||
ecdb4eb7 | 4711 | /* WaDisable4x2SubspanOptimization:hsw */ |
cad2a2d7 ED |
4712 | I915_WRITE(CACHE_MODE_1, |
4713 | _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); | |
1544d9d5 | 4714 | |
ecdb4eb7 | 4715 | /* WaMbcDriverBootEnable:hsw */ |
b3bf0766 PZ |
4716 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
4717 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
4718 | ||
ecdb4eb7 | 4719 | /* WaSwitchSolVfFArbitrationPriority:hsw */ |
e3dff585 BW |
4720 | I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL); |
4721 | ||
90a88643 PZ |
4722 | /* WaRsPkgCStateDisplayPMReq:hsw */ |
4723 | I915_WRITE(CHICKEN_PAR1_1, | |
4724 | I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES); | |
1544d9d5 | 4725 | |
17a303ec | 4726 | lpt_init_clock_gating(dev); |
cad2a2d7 ED |
4727 | } |
4728 | ||
1fa61106 | 4729 | static void ivybridge_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4730 | { |
4731 | struct drm_i915_private *dev_priv = dev->dev_private; | |
20848223 | 4732 | uint32_t snpcr; |
6f1d69b0 | 4733 | |
6f1d69b0 ED |
4734 | I915_WRITE(WM3_LP_ILK, 0); |
4735 | I915_WRITE(WM2_LP_ILK, 0); | |
4736 | I915_WRITE(WM1_LP_ILK, 0); | |
4737 | ||
231e54f6 | 4738 | I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); |
6f1d69b0 | 4739 | |
ecdb4eb7 | 4740 | /* WaDisableEarlyCull:ivb */ |
87f8020e JB |
4741 | I915_WRITE(_3D_CHICKEN3, |
4742 | _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); | |
4743 | ||
ecdb4eb7 | 4744 | /* WaDisableBackToBackFlipFix:ivb */ |
6f1d69b0 ED |
4745 | I915_WRITE(IVB_CHICKEN3, |
4746 | CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | | |
4747 | CHICKEN3_DGMG_DONE_FIX_DISABLE); | |
4748 | ||
ecdb4eb7 | 4749 | /* WaDisablePSDDualDispatchEnable:ivb */ |
12f3382b JB |
4750 | if (IS_IVB_GT1(dev)) |
4751 | I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, | |
4752 | _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); | |
4753 | else | |
4754 | I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2, | |
4755 | _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); | |
4756 | ||
ecdb4eb7 | 4757 | /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */ |
6f1d69b0 ED |
4758 | I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, |
4759 | GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); | |
4760 | ||
ecdb4eb7 | 4761 | /* WaApplyL3ControlAndL3ChickenMode:ivb */ |
6f1d69b0 ED |
4762 | I915_WRITE(GEN7_L3CNTLREG1, |
4763 | GEN7_WA_FOR_GEN7_L3_CONTROL); | |
4764 | I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, | |
8ab43976 JB |
4765 | GEN7_WA_L3_CHICKEN_MODE); |
4766 | if (IS_IVB_GT1(dev)) | |
4767 | I915_WRITE(GEN7_ROW_CHICKEN2, | |
4768 | _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); | |
4769 | else | |
4770 | I915_WRITE(GEN7_ROW_CHICKEN2_GT2, | |
4771 | _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); | |
4772 | ||
6f1d69b0 | 4773 | |
ecdb4eb7 | 4774 | /* WaForceL3Serialization:ivb */ |
61939d97 JB |
4775 | I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & |
4776 | ~L3SQ_URB_READ_CAM_MATCH_DISABLE); | |
4777 | ||
0f846f81 JB |
4778 | /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock |
4779 | * gating disable must be set. Failure to set it results in | |
4780 | * flickering pixels due to Z write ordering failures after | |
4781 | * some amount of runtime in the Mesa "fire" demo, and Unigine | |
4782 | * Sanctuary and Tropics, and apparently anything else with | |
4783 | * alpha test or pixel discard. | |
4784 | * | |
4785 | * According to the spec, bit 11 (RCCUNIT) must also be set, | |
4786 | * but we didn't debug actual testcases to find it out. | |
4787 | * | |
4788 | * According to the spec, bit 13 (RCZUNIT) must be set on IVB. | |
ecdb4eb7 | 4789 | * This implements the WaDisableRCZUnitClockGating:ivb workaround. |
0f846f81 JB |
4790 | */ |
4791 | I915_WRITE(GEN6_UCGCTL2, | |
4792 | GEN6_RCZUNIT_CLOCK_GATE_DISABLE | | |
4793 | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); | |
4794 | ||
ecdb4eb7 | 4795 | /* This is required by WaCatErrorRejectionIssue:ivb */ |
6f1d69b0 ED |
4796 | I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, |
4797 | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | | |
4798 | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); | |
4799 | ||
0e088b8f | 4800 | g4x_disable_trickle_feed(dev); |
6f1d69b0 | 4801 | |
ecdb4eb7 | 4802 | /* WaMbcDriverBootEnable:ivb */ |
b4ae3f22 JB |
4803 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
4804 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
4805 | ||
ecdb4eb7 | 4806 | /* WaVSRefCountFullforceMissDisable:ivb */ |
6f1d69b0 | 4807 | gen7_setup_fixed_func_scheduler(dev_priv); |
97e1930f | 4808 | |
ecdb4eb7 | 4809 | /* WaDisable4x2SubspanOptimization:ivb */ |
97e1930f DV |
4810 | I915_WRITE(CACHE_MODE_1, |
4811 | _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); | |
20848223 BW |
4812 | |
4813 | snpcr = I915_READ(GEN6_MBCUNIT_SNPCR); | |
4814 | snpcr &= ~GEN6_MBC_SNPCR_MASK; | |
4815 | snpcr |= GEN6_MBC_SNPCR_MED; | |
4816 | I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr); | |
3107bd48 | 4817 | |
ab5c608b BW |
4818 | if (!HAS_PCH_NOP(dev)) |
4819 | cpt_init_clock_gating(dev); | |
1d7aaa0c DV |
4820 | |
4821 | gen6_check_mch_setup(dev); | |
6f1d69b0 ED |
4822 | } |
4823 | ||
1fa61106 | 4824 | static void valleyview_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4825 | { |
4826 | struct drm_i915_private *dev_priv = dev->dev_private; | |
6f1d69b0 | 4827 | |
d7fe0cc0 | 4828 | I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE); |
6f1d69b0 | 4829 | |
ecdb4eb7 | 4830 | /* WaDisableEarlyCull:vlv */ |
87f8020e JB |
4831 | I915_WRITE(_3D_CHICKEN3, |
4832 | _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); | |
4833 | ||
ecdb4eb7 | 4834 | /* WaDisableBackToBackFlipFix:vlv */ |
6f1d69b0 ED |
4835 | I915_WRITE(IVB_CHICKEN3, |
4836 | CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | | |
4837 | CHICKEN3_DGMG_DONE_FIX_DISABLE); | |
4838 | ||
ecdb4eb7 | 4839 | /* WaDisablePSDDualDispatchEnable:vlv */ |
12f3382b | 4840 | I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, |
d3bc0303 JB |
4841 | _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP | |
4842 | GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); | |
12f3382b | 4843 | |
ecdb4eb7 | 4844 | /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */ |
6f1d69b0 ED |
4845 | I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, |
4846 | GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); | |
4847 | ||
ecdb4eb7 | 4848 | /* WaApplyL3ControlAndL3ChickenMode:vlv */ |
d0cf5ead | 4849 | I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS); |
6f1d69b0 ED |
4850 | I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); |
4851 | ||
ecdb4eb7 | 4852 | /* WaForceL3Serialization:vlv */ |
61939d97 JB |
4853 | I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & |
4854 | ~L3SQ_URB_READ_CAM_MATCH_DISABLE); | |
4855 | ||
ecdb4eb7 | 4856 | /* WaDisableDopClockGating:vlv */ |
8ab43976 JB |
4857 | I915_WRITE(GEN7_ROW_CHICKEN2, |
4858 | _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); | |
4859 | ||
ecdb4eb7 | 4860 | /* This is required by WaCatErrorRejectionIssue:vlv */ |
6f1d69b0 ED |
4861 | I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, |
4862 | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | | |
4863 | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); | |
4864 | ||
ecdb4eb7 | 4865 | /* WaMbcDriverBootEnable:vlv */ |
b4ae3f22 JB |
4866 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
4867 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
4868 | ||
0f846f81 JB |
4869 | |
4870 | /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock | |
4871 | * gating disable must be set. Failure to set it results in | |
4872 | * flickering pixels due to Z write ordering failures after | |
4873 | * some amount of runtime in the Mesa "fire" demo, and Unigine | |
4874 | * Sanctuary and Tropics, and apparently anything else with | |
4875 | * alpha test or pixel discard. | |
4876 | * | |
4877 | * According to the spec, bit 11 (RCCUNIT) must also be set, | |
4878 | * but we didn't debug actual testcases to find it out. | |
4879 | * | |
4880 | * According to the spec, bit 13 (RCZUNIT) must be set on IVB. | |
ecdb4eb7 | 4881 | * This implements the WaDisableRCZUnitClockGating:vlv workaround. |
0f846f81 | 4882 | * |
ecdb4eb7 DL |
4883 | * Also apply WaDisableVDSUnitClockGating:vlv and |
4884 | * WaDisableRCPBUnitClockGating:vlv. | |
0f846f81 JB |
4885 | */ |
4886 | I915_WRITE(GEN6_UCGCTL2, | |
4887 | GEN7_VDSUNIT_CLOCK_GATE_DISABLE | | |
6edaa7fc | 4888 | GEN7_TDLUNIT_CLOCK_GATE_DISABLE | |
0f846f81 JB |
4889 | GEN6_RCZUNIT_CLOCK_GATE_DISABLE | |
4890 | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | | |
4891 | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); | |
4892 | ||
e3f33d46 JB |
4893 | I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE); |
4894 | ||
e0d8d59b | 4895 | I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE); |
6f1d69b0 | 4896 | |
6b26c86d DV |
4897 | I915_WRITE(CACHE_MODE_1, |
4898 | _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); | |
7983117f | 4899 | |
2d809570 | 4900 | /* |
ecdb4eb7 | 4901 | * WaDisableVLVClockGating_VBIIssue:vlv |
2d809570 JB |
4902 | * Disable clock gating on th GCFG unit to prevent a delay |
4903 | * in the reporting of vblank events. | |
4904 | */ | |
4e8c84a5 JB |
4905 | I915_WRITE(VLV_GUNIT_CLOCK_GATE, 0xffffffff); |
4906 | ||
4907 | /* Conservative clock gating settings for now */ | |
4908 | I915_WRITE(0x9400, 0xffffffff); | |
4909 | I915_WRITE(0x9404, 0xffffffff); | |
4910 | I915_WRITE(0x9408, 0xffffffff); | |
4911 | I915_WRITE(0x940c, 0xffffffff); | |
4912 | I915_WRITE(0x9410, 0xffffffff); | |
4913 | I915_WRITE(0x9414, 0xffffffff); | |
4914 | I915_WRITE(0x9418, 0xffffffff); | |
6f1d69b0 ED |
4915 | } |
4916 | ||
1fa61106 | 4917 | static void g4x_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4918 | { |
4919 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4920 | uint32_t dspclk_gate; | |
4921 | ||
4922 | I915_WRITE(RENCLK_GATE_D1, 0); | |
4923 | I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE | | |
4924 | GS_UNIT_CLOCK_GATE_DISABLE | | |
4925 | CL_UNIT_CLOCK_GATE_DISABLE); | |
4926 | I915_WRITE(RAMCLK_GATE_D, 0); | |
4927 | dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE | | |
4928 | OVRUNIT_CLOCK_GATE_DISABLE | | |
4929 | OVCUNIT_CLOCK_GATE_DISABLE; | |
4930 | if (IS_GM45(dev)) | |
4931 | dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE; | |
4932 | I915_WRITE(DSPCLK_GATE_D, dspclk_gate); | |
4358a374 DV |
4933 | |
4934 | /* WaDisableRenderCachePipelinedFlush */ | |
4935 | I915_WRITE(CACHE_MODE_0, | |
4936 | _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); | |
de1aa629 | 4937 | |
0e088b8f | 4938 | g4x_disable_trickle_feed(dev); |
6f1d69b0 ED |
4939 | } |
4940 | ||
1fa61106 | 4941 | static void crestline_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4942 | { |
4943 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4944 | ||
4945 | I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE); | |
4946 | I915_WRITE(RENCLK_GATE_D2, 0); | |
4947 | I915_WRITE(DSPCLK_GATE_D, 0); | |
4948 | I915_WRITE(RAMCLK_GATE_D, 0); | |
4949 | I915_WRITE16(DEUC, 0); | |
20f94967 VS |
4950 | I915_WRITE(MI_ARB_STATE, |
4951 | _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); | |
6f1d69b0 ED |
4952 | } |
4953 | ||
1fa61106 | 4954 | static void broadwater_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4955 | { |
4956 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4957 | ||
4958 | I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE | | |
4959 | I965_RCC_CLOCK_GATE_DISABLE | | |
4960 | I965_RCPB_CLOCK_GATE_DISABLE | | |
4961 | I965_ISC_CLOCK_GATE_DISABLE | | |
4962 | I965_FBC_CLOCK_GATE_DISABLE); | |
4963 | I915_WRITE(RENCLK_GATE_D2, 0); | |
20f94967 VS |
4964 | I915_WRITE(MI_ARB_STATE, |
4965 | _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); | |
6f1d69b0 ED |
4966 | } |
4967 | ||
1fa61106 | 4968 | static void gen3_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4969 | { |
4970 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4971 | u32 dstate = I915_READ(D_STATE); | |
4972 | ||
4973 | dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING | | |
4974 | DSTATE_DOT_CLOCK_GATING; | |
4975 | I915_WRITE(D_STATE, dstate); | |
13a86b85 CW |
4976 | |
4977 | if (IS_PINEVIEW(dev)) | |
4978 | I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY)); | |
974a3b0f DV |
4979 | |
4980 | /* IIR "flip pending" means done if this bit is set */ | |
4981 | I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE)); | |
6f1d69b0 ED |
4982 | } |
4983 | ||
1fa61106 | 4984 | static void i85x_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4985 | { |
4986 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4987 | ||
4988 | I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE); | |
4989 | } | |
4990 | ||
1fa61106 | 4991 | static void i830_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4992 | { |
4993 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4994 | ||
4995 | I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE); | |
4996 | } | |
4997 | ||
6f1d69b0 ED |
4998 | void intel_init_clock_gating(struct drm_device *dev) |
4999 | { | |
5000 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5001 | ||
5002 | dev_priv->display.init_clock_gating(dev); | |
6f1d69b0 ED |
5003 | } |
5004 | ||
7d708ee4 ID |
5005 | void intel_suspend_hw(struct drm_device *dev) |
5006 | { | |
5007 | if (HAS_PCH_LPT(dev)) | |
5008 | lpt_suspend_hw(dev); | |
5009 | } | |
5010 | ||
15d199ea PZ |
5011 | /** |
5012 | * We should only use the power well if we explicitly asked the hardware to | |
5013 | * enable it, so check if it's enabled and also check if we've requested it to | |
5014 | * be enabled. | |
5015 | */ | |
b97186f0 PZ |
5016 | bool intel_display_power_enabled(struct drm_device *dev, |
5017 | enum intel_display_power_domain domain) | |
15d199ea PZ |
5018 | { |
5019 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5020 | ||
b97186f0 PZ |
5021 | if (!HAS_POWER_WELL(dev)) |
5022 | return true; | |
5023 | ||
5024 | switch (domain) { | |
5025 | case POWER_DOMAIN_PIPE_A: | |
5026 | case POWER_DOMAIN_TRANSCODER_EDP: | |
5027 | return true; | |
5028 | case POWER_DOMAIN_PIPE_B: | |
5029 | case POWER_DOMAIN_PIPE_C: | |
5030 | case POWER_DOMAIN_PIPE_A_PANEL_FITTER: | |
5031 | case POWER_DOMAIN_PIPE_B_PANEL_FITTER: | |
5032 | case POWER_DOMAIN_PIPE_C_PANEL_FITTER: | |
5033 | case POWER_DOMAIN_TRANSCODER_A: | |
5034 | case POWER_DOMAIN_TRANSCODER_B: | |
5035 | case POWER_DOMAIN_TRANSCODER_C: | |
15d199ea PZ |
5036 | return I915_READ(HSW_PWR_WELL_DRIVER) == |
5037 | (HSW_PWR_WELL_ENABLE | HSW_PWR_WELL_STATE); | |
b97186f0 PZ |
5038 | default: |
5039 | BUG(); | |
5040 | } | |
15d199ea PZ |
5041 | } |
5042 | ||
a38911a3 | 5043 | static void __intel_set_power_well(struct drm_device *dev, bool enable) |
d0d3e513 ED |
5044 | { |
5045 | struct drm_i915_private *dev_priv = dev->dev_private; | |
fa42e23c PZ |
5046 | bool is_enabled, enable_requested; |
5047 | uint32_t tmp; | |
d0d3e513 | 5048 | |
fa42e23c PZ |
5049 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); |
5050 | is_enabled = tmp & HSW_PWR_WELL_STATE; | |
5051 | enable_requested = tmp & HSW_PWR_WELL_ENABLE; | |
d0d3e513 | 5052 | |
fa42e23c PZ |
5053 | if (enable) { |
5054 | if (!enable_requested) | |
5055 | I915_WRITE(HSW_PWR_WELL_DRIVER, HSW_PWR_WELL_ENABLE); | |
d0d3e513 | 5056 | |
fa42e23c PZ |
5057 | if (!is_enabled) { |
5058 | DRM_DEBUG_KMS("Enabling power well\n"); | |
5059 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & | |
5060 | HSW_PWR_WELL_STATE), 20)) | |
5061 | DRM_ERROR("Timeout enabling power well\n"); | |
5062 | } | |
5063 | } else { | |
5064 | if (enable_requested) { | |
5065 | I915_WRITE(HSW_PWR_WELL_DRIVER, 0); | |
5066 | DRM_DEBUG_KMS("Requesting to disable the power well\n"); | |
d0d3e513 ED |
5067 | } |
5068 | } | |
fa42e23c | 5069 | } |
d0d3e513 | 5070 | |
a38911a3 WX |
5071 | static struct i915_power_well *hsw_pwr; |
5072 | ||
5073 | /* Display audio driver power well request */ | |
5074 | void i915_request_power_well(void) | |
5075 | { | |
5076 | if (WARN_ON(!hsw_pwr)) | |
5077 | return; | |
5078 | ||
5079 | spin_lock_irq(&hsw_pwr->lock); | |
5080 | if (!hsw_pwr->count++ && | |
5081 | !hsw_pwr->i915_request) | |
5082 | __intel_set_power_well(hsw_pwr->device, true); | |
5083 | spin_unlock_irq(&hsw_pwr->lock); | |
5084 | } | |
5085 | EXPORT_SYMBOL_GPL(i915_request_power_well); | |
5086 | ||
5087 | /* Display audio driver power well release */ | |
5088 | void i915_release_power_well(void) | |
5089 | { | |
5090 | if (WARN_ON(!hsw_pwr)) | |
5091 | return; | |
5092 | ||
5093 | spin_lock_irq(&hsw_pwr->lock); | |
5094 | WARN_ON(!hsw_pwr->count); | |
5095 | if (!--hsw_pwr->count && | |
5096 | !hsw_pwr->i915_request) | |
5097 | __intel_set_power_well(hsw_pwr->device, false); | |
5098 | spin_unlock_irq(&hsw_pwr->lock); | |
5099 | } | |
5100 | EXPORT_SYMBOL_GPL(i915_release_power_well); | |
5101 | ||
5102 | int i915_init_power_well(struct drm_device *dev) | |
5103 | { | |
5104 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5105 | ||
5106 | hsw_pwr = &dev_priv->power_well; | |
5107 | ||
5108 | hsw_pwr->device = dev; | |
5109 | spin_lock_init(&hsw_pwr->lock); | |
5110 | hsw_pwr->count = 0; | |
5111 | ||
5112 | return 0; | |
5113 | } | |
5114 | ||
5115 | void i915_remove_power_well(struct drm_device *dev) | |
5116 | { | |
5117 | hsw_pwr = NULL; | |
5118 | } | |
5119 | ||
5120 | void intel_set_power_well(struct drm_device *dev, bool enable) | |
5121 | { | |
5122 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5123 | struct i915_power_well *power_well = &dev_priv->power_well; | |
5124 | ||
5125 | if (!HAS_POWER_WELL(dev)) | |
5126 | return; | |
5127 | ||
5128 | if (!i915_disable_power_well && !enable) | |
5129 | return; | |
5130 | ||
5131 | spin_lock_irq(&power_well->lock); | |
5132 | power_well->i915_request = enable; | |
5133 | ||
5134 | /* only reject "disable" power well request */ | |
5135 | if (power_well->count && !enable) { | |
5136 | spin_unlock_irq(&power_well->lock); | |
5137 | return; | |
5138 | } | |
5139 | ||
5140 | __intel_set_power_well(dev, enable); | |
5141 | spin_unlock_irq(&power_well->lock); | |
5142 | } | |
5143 | ||
fa42e23c PZ |
5144 | /* |
5145 | * Starting with Haswell, we have a "Power Down Well" that can be turned off | |
5146 | * when not needed anymore. We have 4 registers that can request the power well | |
5147 | * to be enabled, and it will only be disabled if none of the registers is | |
5148 | * requesting it to be enabled. | |
d0d3e513 | 5149 | */ |
fa42e23c | 5150 | void intel_init_power_well(struct drm_device *dev) |
d0d3e513 ED |
5151 | { |
5152 | struct drm_i915_private *dev_priv = dev->dev_private; | |
d0d3e513 | 5153 | |
86d52df6 | 5154 | if (!HAS_POWER_WELL(dev)) |
d0d3e513 ED |
5155 | return; |
5156 | ||
fa42e23c PZ |
5157 | /* For now, we need the power well to be always enabled. */ |
5158 | intel_set_power_well(dev, true); | |
d0d3e513 | 5159 | |
fa42e23c PZ |
5160 | /* We're taking over the BIOS, so clear any requests made by it since |
5161 | * the driver is in charge now. */ | |
5162 | if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE) | |
5163 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
d0d3e513 ED |
5164 | } |
5165 | ||
1fa61106 ED |
5166 | /* Set up chip specific power management-related functions */ |
5167 | void intel_init_pm(struct drm_device *dev) | |
5168 | { | |
5169 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5170 | ||
5171 | if (I915_HAS_FBC(dev)) { | |
5172 | if (HAS_PCH_SPLIT(dev)) { | |
5173 | dev_priv->display.fbc_enabled = ironlake_fbc_enabled; | |
891348b2 | 5174 | if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) |
abe959c7 RV |
5175 | dev_priv->display.enable_fbc = |
5176 | gen7_enable_fbc; | |
5177 | else | |
5178 | dev_priv->display.enable_fbc = | |
5179 | ironlake_enable_fbc; | |
1fa61106 ED |
5180 | dev_priv->display.disable_fbc = ironlake_disable_fbc; |
5181 | } else if (IS_GM45(dev)) { | |
5182 | dev_priv->display.fbc_enabled = g4x_fbc_enabled; | |
5183 | dev_priv->display.enable_fbc = g4x_enable_fbc; | |
5184 | dev_priv->display.disable_fbc = g4x_disable_fbc; | |
5185 | } else if (IS_CRESTLINE(dev)) { | |
5186 | dev_priv->display.fbc_enabled = i8xx_fbc_enabled; | |
5187 | dev_priv->display.enable_fbc = i8xx_enable_fbc; | |
5188 | dev_priv->display.disable_fbc = i8xx_disable_fbc; | |
5189 | } | |
5190 | /* 855GM needs testing */ | |
5191 | } | |
5192 | ||
c921aba8 DV |
5193 | /* For cxsr */ |
5194 | if (IS_PINEVIEW(dev)) | |
5195 | i915_pineview_get_mem_freq(dev); | |
5196 | else if (IS_GEN5(dev)) | |
5197 | i915_ironlake_get_mem_freq(dev); | |
5198 | ||
1fa61106 ED |
5199 | /* For FIFO watermark updates */ |
5200 | if (HAS_PCH_SPLIT(dev)) { | |
1fa61106 ED |
5201 | if (IS_GEN5(dev)) { |
5202 | if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK) | |
5203 | dev_priv->display.update_wm = ironlake_update_wm; | |
5204 | else { | |
5205 | DRM_DEBUG_KMS("Failed to get proper latency. " | |
5206 | "Disable CxSR\n"); | |
5207 | dev_priv->display.update_wm = NULL; | |
5208 | } | |
5209 | dev_priv->display.init_clock_gating = ironlake_init_clock_gating; | |
5210 | } else if (IS_GEN6(dev)) { | |
5211 | if (SNB_READ_WM0_LATENCY()) { | |
5212 | dev_priv->display.update_wm = sandybridge_update_wm; | |
5213 | dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; | |
5214 | } else { | |
5215 | DRM_DEBUG_KMS("Failed to read display plane latency. " | |
5216 | "Disable CxSR\n"); | |
5217 | dev_priv->display.update_wm = NULL; | |
5218 | } | |
5219 | dev_priv->display.init_clock_gating = gen6_init_clock_gating; | |
5220 | } else if (IS_IVYBRIDGE(dev)) { | |
1fa61106 | 5221 | if (SNB_READ_WM0_LATENCY()) { |
c43d0188 | 5222 | dev_priv->display.update_wm = ivybridge_update_wm; |
1fa61106 ED |
5223 | dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; |
5224 | } else { | |
5225 | DRM_DEBUG_KMS("Failed to read display plane latency. " | |
5226 | "Disable CxSR\n"); | |
5227 | dev_priv->display.update_wm = NULL; | |
5228 | } | |
5229 | dev_priv->display.init_clock_gating = ivybridge_init_clock_gating; | |
6b8a5eeb | 5230 | } else if (IS_HASWELL(dev)) { |
3e1f7266 | 5231 | if (I915_READ64(MCH_SSKPD)) { |
1011d8c4 | 5232 | dev_priv->display.update_wm = haswell_update_wm; |
526682e9 PZ |
5233 | dev_priv->display.update_sprite_wm = |
5234 | haswell_update_sprite_wm; | |
6b8a5eeb ED |
5235 | } else { |
5236 | DRM_DEBUG_KMS("Failed to read display plane latency. " | |
5237 | "Disable CxSR\n"); | |
5238 | dev_priv->display.update_wm = NULL; | |
5239 | } | |
cad2a2d7 | 5240 | dev_priv->display.init_clock_gating = haswell_init_clock_gating; |
1fa61106 ED |
5241 | } else |
5242 | dev_priv->display.update_wm = NULL; | |
5243 | } else if (IS_VALLEYVIEW(dev)) { | |
5244 | dev_priv->display.update_wm = valleyview_update_wm; | |
5245 | dev_priv->display.init_clock_gating = | |
5246 | valleyview_init_clock_gating; | |
1fa61106 ED |
5247 | } else if (IS_PINEVIEW(dev)) { |
5248 | if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev), | |
5249 | dev_priv->is_ddr3, | |
5250 | dev_priv->fsb_freq, | |
5251 | dev_priv->mem_freq)) { | |
5252 | DRM_INFO("failed to find known CxSR latency " | |
5253 | "(found ddr%s fsb freq %d, mem freq %d), " | |
5254 | "disabling CxSR\n", | |
5255 | (dev_priv->is_ddr3 == 1) ? "3" : "2", | |
5256 | dev_priv->fsb_freq, dev_priv->mem_freq); | |
5257 | /* Disable CxSR and never update its watermark again */ | |
5258 | pineview_disable_cxsr(dev); | |
5259 | dev_priv->display.update_wm = NULL; | |
5260 | } else | |
5261 | dev_priv->display.update_wm = pineview_update_wm; | |
5262 | dev_priv->display.init_clock_gating = gen3_init_clock_gating; | |
5263 | } else if (IS_G4X(dev)) { | |
5264 | dev_priv->display.update_wm = g4x_update_wm; | |
5265 | dev_priv->display.init_clock_gating = g4x_init_clock_gating; | |
5266 | } else if (IS_GEN4(dev)) { | |
5267 | dev_priv->display.update_wm = i965_update_wm; | |
5268 | if (IS_CRESTLINE(dev)) | |
5269 | dev_priv->display.init_clock_gating = crestline_init_clock_gating; | |
5270 | else if (IS_BROADWATER(dev)) | |
5271 | dev_priv->display.init_clock_gating = broadwater_init_clock_gating; | |
5272 | } else if (IS_GEN3(dev)) { | |
5273 | dev_priv->display.update_wm = i9xx_update_wm; | |
5274 | dev_priv->display.get_fifo_size = i9xx_get_fifo_size; | |
5275 | dev_priv->display.init_clock_gating = gen3_init_clock_gating; | |
5276 | } else if (IS_I865G(dev)) { | |
5277 | dev_priv->display.update_wm = i830_update_wm; | |
5278 | dev_priv->display.init_clock_gating = i85x_init_clock_gating; | |
5279 | dev_priv->display.get_fifo_size = i830_get_fifo_size; | |
5280 | } else if (IS_I85X(dev)) { | |
5281 | dev_priv->display.update_wm = i9xx_update_wm; | |
5282 | dev_priv->display.get_fifo_size = i85x_get_fifo_size; | |
5283 | dev_priv->display.init_clock_gating = i85x_init_clock_gating; | |
5284 | } else { | |
5285 | dev_priv->display.update_wm = i830_update_wm; | |
5286 | dev_priv->display.init_clock_gating = i830_init_clock_gating; | |
5287 | if (IS_845G(dev)) | |
5288 | dev_priv->display.get_fifo_size = i845_get_fifo_size; | |
5289 | else | |
5290 | dev_priv->display.get_fifo_size = i830_get_fifo_size; | |
5291 | } | |
5292 | } | |
5293 | ||
6590190d ED |
5294 | static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv) |
5295 | { | |
5296 | u32 gt_thread_status_mask; | |
5297 | ||
5298 | if (IS_HASWELL(dev_priv->dev)) | |
5299 | gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW; | |
5300 | else | |
5301 | gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK; | |
5302 | ||
5303 | /* w/a for a sporadic read returning 0 by waiting for the GT | |
5304 | * thread to wake up. | |
5305 | */ | |
5306 | if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500)) | |
5307 | DRM_ERROR("GT thread status wait timed out\n"); | |
5308 | } | |
5309 | ||
16995a9f CW |
5310 | static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv) |
5311 | { | |
5312 | I915_WRITE_NOTRACE(FORCEWAKE, 0); | |
5313 | POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ | |
5314 | } | |
5315 | ||
6590190d ED |
5316 | static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) |
5317 | { | |
ebd37ce1 | 5318 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0, |
057d3860 | 5319 | FORCEWAKE_ACK_TIMEOUT_MS)) |
8a038fd6 | 5320 | DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); |
6590190d | 5321 | |
30771e16 | 5322 | I915_WRITE_NOTRACE(FORCEWAKE, 1); |
8dee3eea | 5323 | POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ |
6590190d | 5324 | |
ebd37ce1 | 5325 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1), |
057d3860 | 5326 | FORCEWAKE_ACK_TIMEOUT_MS)) |
8a038fd6 | 5327 | DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); |
6590190d | 5328 | |
8693a824 | 5329 | /* WaRsForcewakeWaitTC0:snb */ |
6590190d ED |
5330 | __gen6_gt_wait_for_thread_c0(dev_priv); |
5331 | } | |
5332 | ||
16995a9f CW |
5333 | static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv) |
5334 | { | |
5335 | I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff)); | |
b5144075 JN |
5336 | /* something from same cacheline, but !FORCEWAKE_MT */ |
5337 | POSTING_READ(ECOBUS); | |
16995a9f CW |
5338 | } |
5339 | ||
6590190d ED |
5340 | static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv) |
5341 | { | |
5342 | u32 forcewake_ack; | |
5343 | ||
5344 | if (IS_HASWELL(dev_priv->dev)) | |
5345 | forcewake_ack = FORCEWAKE_ACK_HSW; | |
5346 | else | |
5347 | forcewake_ack = FORCEWAKE_MT_ACK; | |
5348 | ||
83983c8b | 5349 | if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL) == 0, |
057d3860 | 5350 | FORCEWAKE_ACK_TIMEOUT_MS)) |
8a038fd6 | 5351 | DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); |
6590190d | 5352 | |
c5836c27 | 5353 | I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); |
b5144075 JN |
5354 | /* something from same cacheline, but !FORCEWAKE_MT */ |
5355 | POSTING_READ(ECOBUS); | |
6590190d | 5356 | |
83983c8b | 5357 | if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL), |
057d3860 | 5358 | FORCEWAKE_ACK_TIMEOUT_MS)) |
8a038fd6 | 5359 | DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); |
6590190d | 5360 | |
8693a824 | 5361 | /* WaRsForcewakeWaitTC0:ivb,hsw */ |
6590190d ED |
5362 | __gen6_gt_wait_for_thread_c0(dev_priv); |
5363 | } | |
5364 | ||
5365 | /* | |
5366 | * Generally this is called implicitly by the register read function. However, | |
5367 | * if some sequence requires the GT to not power down then this function should | |
5368 | * be called at the beginning of the sequence followed by a call to | |
5369 | * gen6_gt_force_wake_put() at the end of the sequence. | |
5370 | */ | |
5371 | void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) | |
5372 | { | |
5373 | unsigned long irqflags; | |
5374 | ||
5375 | spin_lock_irqsave(&dev_priv->gt_lock, irqflags); | |
5376 | if (dev_priv->forcewake_count++ == 0) | |
5377 | dev_priv->gt.force_wake_get(dev_priv); | |
5378 | spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); | |
5379 | } | |
5380 | ||
5381 | void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv) | |
5382 | { | |
5383 | u32 gtfifodbg; | |
5384 | gtfifodbg = I915_READ_NOTRACE(GTFIFODBG); | |
5385 | if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK, | |
5386 | "MMIO read or write has been dropped %x\n", gtfifodbg)) | |
5387 | I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK); | |
5388 | } | |
5389 | ||
5390 | static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) | |
5391 | { | |
5392 | I915_WRITE_NOTRACE(FORCEWAKE, 0); | |
b5144075 JN |
5393 | /* something from same cacheline, but !FORCEWAKE */ |
5394 | POSTING_READ(ECOBUS); | |
6590190d ED |
5395 | gen6_gt_check_fifodbg(dev_priv); |
5396 | } | |
5397 | ||
5398 | static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv) | |
5399 | { | |
c5836c27 | 5400 | I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); |
b5144075 JN |
5401 | /* something from same cacheline, but !FORCEWAKE_MT */ |
5402 | POSTING_READ(ECOBUS); | |
6590190d ED |
5403 | gen6_gt_check_fifodbg(dev_priv); |
5404 | } | |
5405 | ||
5406 | /* | |
5407 | * see gen6_gt_force_wake_get() | |
5408 | */ | |
5409 | void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) | |
5410 | { | |
5411 | unsigned long irqflags; | |
5412 | ||
5413 | spin_lock_irqsave(&dev_priv->gt_lock, irqflags); | |
5414 | if (--dev_priv->forcewake_count == 0) | |
5415 | dev_priv->gt.force_wake_put(dev_priv); | |
5416 | spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); | |
5417 | } | |
5418 | ||
5419 | int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) | |
5420 | { | |
5421 | int ret = 0; | |
5422 | ||
5423 | if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) { | |
5424 | int loop = 500; | |
5425 | u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); | |
5426 | while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) { | |
5427 | udelay(10); | |
5428 | fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); | |
5429 | } | |
5430 | if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES)) | |
5431 | ++ret; | |
5432 | dev_priv->gt_fifo_count = fifo; | |
5433 | } | |
5434 | dev_priv->gt_fifo_count--; | |
5435 | ||
5436 | return ret; | |
5437 | } | |
5438 | ||
16995a9f CW |
5439 | static void vlv_force_wake_reset(struct drm_i915_private *dev_priv) |
5440 | { | |
5441 | I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff)); | |
b5144075 JN |
5442 | /* something from same cacheline, but !FORCEWAKE_VLV */ |
5443 | POSTING_READ(FORCEWAKE_ACK_VLV); | |
16995a9f CW |
5444 | } |
5445 | ||
6590190d ED |
5446 | static void vlv_force_wake_get(struct drm_i915_private *dev_priv) |
5447 | { | |
83983c8b | 5448 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL) == 0, |
057d3860 | 5449 | FORCEWAKE_ACK_TIMEOUT_MS)) |
8a038fd6 | 5450 | DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); |
6590190d | 5451 | |
c5836c27 | 5452 | I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); |
ed5de399 JB |
5453 | I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV, |
5454 | _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); | |
6590190d | 5455 | |
83983c8b | 5456 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL), |
057d3860 | 5457 | FORCEWAKE_ACK_TIMEOUT_MS)) |
ed5de399 JB |
5458 | DRM_ERROR("Timed out waiting for GT to ack forcewake request.\n"); |
5459 | ||
5460 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_MEDIA_VLV) & | |
5461 | FORCEWAKE_KERNEL), | |
5462 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
5463 | DRM_ERROR("Timed out waiting for media to ack forcewake request.\n"); | |
6590190d | 5464 | |
8693a824 | 5465 | /* WaRsForcewakeWaitTC0:vlv */ |
6590190d ED |
5466 | __gen6_gt_wait_for_thread_c0(dev_priv); |
5467 | } | |
5468 | ||
5469 | static void vlv_force_wake_put(struct drm_i915_private *dev_priv) | |
5470 | { | |
c5836c27 | 5471 | I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); |
ed5de399 JB |
5472 | I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV, |
5473 | _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); | |
5474 | /* The below doubles as a POSTING_READ */ | |
5ab140a4 | 5475 | gen6_gt_check_fifodbg(dev_priv); |
6590190d ED |
5476 | } |
5477 | ||
16995a9f CW |
5478 | void intel_gt_reset(struct drm_device *dev) |
5479 | { | |
5480 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5481 | ||
5482 | if (IS_VALLEYVIEW(dev)) { | |
5483 | vlv_force_wake_reset(dev_priv); | |
5484 | } else if (INTEL_INFO(dev)->gen >= 6) { | |
5485 | __gen6_gt_force_wake_reset(dev_priv); | |
5486 | if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) | |
5487 | __gen6_gt_force_wake_mt_reset(dev_priv); | |
5488 | } | |
5489 | } | |
5490 | ||
6590190d ED |
5491 | void intel_gt_init(struct drm_device *dev) |
5492 | { | |
5493 | struct drm_i915_private *dev_priv = dev->dev_private; | |
5494 | ||
5495 | spin_lock_init(&dev_priv->gt_lock); | |
5496 | ||
16995a9f CW |
5497 | intel_gt_reset(dev); |
5498 | ||
6590190d ED |
5499 | if (IS_VALLEYVIEW(dev)) { |
5500 | dev_priv->gt.force_wake_get = vlv_force_wake_get; | |
5501 | dev_priv->gt.force_wake_put = vlv_force_wake_put; | |
36ec8f87 DV |
5502 | } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { |
5503 | dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; | |
5504 | dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; | |
5505 | } else if (IS_GEN6(dev)) { | |
6590190d ED |
5506 | dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; |
5507 | dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; | |
6590190d | 5508 | } |
1a01ab3b JB |
5509 | INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work, |
5510 | intel_gen6_powersave_work); | |
6590190d ED |
5511 | } |
5512 | ||
42c0526c BW |
5513 | int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val) |
5514 | { | |
4fc688ce | 5515 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
42c0526c BW |
5516 | |
5517 | if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { | |
5518 | DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n"); | |
5519 | return -EAGAIN; | |
5520 | } | |
5521 | ||
5522 | I915_WRITE(GEN6_PCODE_DATA, *val); | |
5523 | I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); | |
5524 | ||
5525 | if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, | |
5526 | 500)) { | |
5527 | DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox); | |
5528 | return -ETIMEDOUT; | |
5529 | } | |
5530 | ||
5531 | *val = I915_READ(GEN6_PCODE_DATA); | |
5532 | I915_WRITE(GEN6_PCODE_DATA, 0); | |
5533 | ||
5534 | return 0; | |
5535 | } | |
5536 | ||
5537 | int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val) | |
5538 | { | |
4fc688ce | 5539 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
42c0526c BW |
5540 | |
5541 | if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { | |
5542 | DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n"); | |
5543 | return -EAGAIN; | |
5544 | } | |
5545 | ||
5546 | I915_WRITE(GEN6_PCODE_DATA, val); | |
5547 | I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); | |
5548 | ||
5549 | if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, | |
5550 | 500)) { | |
5551 | DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox); | |
5552 | return -ETIMEDOUT; | |
5553 | } | |
5554 | ||
5555 | I915_WRITE(GEN6_PCODE_DATA, 0); | |
5556 | ||
5557 | return 0; | |
5558 | } | |
a0e4e199 | 5559 | |
855ba3be JB |
5560 | int vlv_gpu_freq(int ddr_freq, int val) |
5561 | { | |
5562 | int mult, base; | |
5563 | ||
5564 | switch (ddr_freq) { | |
5565 | case 800: | |
5566 | mult = 20; | |
5567 | base = 120; | |
5568 | break; | |
5569 | case 1066: | |
5570 | mult = 22; | |
5571 | base = 133; | |
5572 | break; | |
5573 | case 1333: | |
5574 | mult = 21; | |
5575 | base = 125; | |
5576 | break; | |
5577 | default: | |
5578 | return -1; | |
5579 | } | |
5580 | ||
5581 | return ((val - 0xbd) * mult) + base; | |
5582 | } | |
5583 | ||
5584 | int vlv_freq_opcode(int ddr_freq, int val) | |
5585 | { | |
5586 | int mult, base; | |
5587 | ||
5588 | switch (ddr_freq) { | |
5589 | case 800: | |
5590 | mult = 20; | |
5591 | base = 120; | |
5592 | break; | |
5593 | case 1066: | |
5594 | mult = 22; | |
5595 | base = 133; | |
5596 | break; | |
5597 | case 1333: | |
5598 | mult = 21; | |
5599 | base = 125; | |
5600 | break; | |
5601 | default: | |
5602 | return -1; | |
5603 | } | |
5604 | ||
5605 | val /= mult; | |
5606 | val -= base / mult; | |
5607 | val += 0xbd; | |
5608 | ||
5609 | if (val > 0xea) | |
5610 | val = 0xea; | |
5611 | ||
5612 | return val; | |
5613 | } | |
5614 |