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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 | ||
1fa61106 | 47 | static void i8xx_disable_fbc(struct drm_device *dev) |
85208be0 ED |
48 | { |
49 | struct drm_i915_private *dev_priv = dev->dev_private; | |
50 | u32 fbc_ctl; | |
51 | ||
52 | /* Disable compression */ | |
53 | fbc_ctl = I915_READ(FBC_CONTROL); | |
54 | if ((fbc_ctl & FBC_CTL_EN) == 0) | |
55 | return; | |
56 | ||
57 | fbc_ctl &= ~FBC_CTL_EN; | |
58 | I915_WRITE(FBC_CONTROL, fbc_ctl); | |
59 | ||
60 | /* Wait for compressing bit to clear */ | |
61 | if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) { | |
62 | DRM_DEBUG_KMS("FBC idle timed out\n"); | |
63 | return; | |
64 | } | |
65 | ||
66 | DRM_DEBUG_KMS("disabled FBC\n"); | |
67 | } | |
68 | ||
1fa61106 | 69 | static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
85208be0 ED |
70 | { |
71 | struct drm_device *dev = crtc->dev; | |
72 | struct drm_i915_private *dev_priv = dev->dev_private; | |
73 | struct drm_framebuffer *fb = crtc->fb; | |
74 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
75 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
76 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
77 | int cfb_pitch; | |
78 | int plane, i; | |
79 | u32 fbc_ctl, fbc_ctl2; | |
80 | ||
81 | cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE; | |
82 | if (fb->pitches[0] < cfb_pitch) | |
83 | cfb_pitch = fb->pitches[0]; | |
84 | ||
85 | /* FBC_CTL wants 64B units */ | |
86 | cfb_pitch = (cfb_pitch / 64) - 1; | |
87 | plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB; | |
88 | ||
89 | /* Clear old tags */ | |
90 | for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) | |
91 | I915_WRITE(FBC_TAG + (i * 4), 0); | |
92 | ||
93 | /* Set it up... */ | |
94 | fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; | |
95 | fbc_ctl2 |= plane; | |
96 | I915_WRITE(FBC_CONTROL2, fbc_ctl2); | |
97 | I915_WRITE(FBC_FENCE_OFF, crtc->y); | |
98 | ||
99 | /* enable it... */ | |
100 | fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC; | |
101 | if (IS_I945GM(dev)) | |
102 | fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ | |
103 | fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; | |
104 | fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT; | |
105 | fbc_ctl |= obj->fence_reg; | |
106 | I915_WRITE(FBC_CONTROL, fbc_ctl); | |
107 | ||
108 | DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %d, ", | |
109 | cfb_pitch, crtc->y, intel_crtc->plane); | |
110 | } | |
111 | ||
1fa61106 | 112 | static bool i8xx_fbc_enabled(struct drm_device *dev) |
85208be0 ED |
113 | { |
114 | struct drm_i915_private *dev_priv = dev->dev_private; | |
115 | ||
116 | return I915_READ(FBC_CONTROL) & FBC_CTL_EN; | |
117 | } | |
118 | ||
1fa61106 | 119 | static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
85208be0 ED |
120 | { |
121 | struct drm_device *dev = crtc->dev; | |
122 | struct drm_i915_private *dev_priv = dev->dev_private; | |
123 | struct drm_framebuffer *fb = crtc->fb; | |
124 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
125 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
126 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
127 | int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; | |
128 | unsigned long stall_watermark = 200; | |
129 | u32 dpfc_ctl; | |
130 | ||
131 | dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X; | |
132 | dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg; | |
133 | I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY); | |
134 | ||
135 | I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | | |
136 | (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | | |
137 | (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); | |
138 | I915_WRITE(DPFC_FENCE_YOFF, crtc->y); | |
139 | ||
140 | /* enable it... */ | |
141 | I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN); | |
142 | ||
143 | DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane); | |
144 | } | |
145 | ||
1fa61106 | 146 | static void g4x_disable_fbc(struct drm_device *dev) |
85208be0 ED |
147 | { |
148 | struct drm_i915_private *dev_priv = dev->dev_private; | |
149 | u32 dpfc_ctl; | |
150 | ||
151 | /* Disable compression */ | |
152 | dpfc_ctl = I915_READ(DPFC_CONTROL); | |
153 | if (dpfc_ctl & DPFC_CTL_EN) { | |
154 | dpfc_ctl &= ~DPFC_CTL_EN; | |
155 | I915_WRITE(DPFC_CONTROL, dpfc_ctl); | |
156 | ||
157 | DRM_DEBUG_KMS("disabled FBC\n"); | |
158 | } | |
159 | } | |
160 | ||
1fa61106 | 161 | static bool g4x_fbc_enabled(struct drm_device *dev) |
85208be0 ED |
162 | { |
163 | struct drm_i915_private *dev_priv = dev->dev_private; | |
164 | ||
165 | return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; | |
166 | } | |
167 | ||
168 | static void sandybridge_blit_fbc_update(struct drm_device *dev) | |
169 | { | |
170 | struct drm_i915_private *dev_priv = dev->dev_private; | |
171 | u32 blt_ecoskpd; | |
172 | ||
173 | /* Make sure blitter notifies FBC of writes */ | |
174 | gen6_gt_force_wake_get(dev_priv); | |
175 | blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD); | |
176 | blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY << | |
177 | GEN6_BLITTER_LOCK_SHIFT; | |
178 | I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); | |
179 | blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY; | |
180 | I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); | |
181 | blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY << | |
182 | GEN6_BLITTER_LOCK_SHIFT); | |
183 | I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); | |
184 | POSTING_READ(GEN6_BLITTER_ECOSKPD); | |
185 | gen6_gt_force_wake_put(dev_priv); | |
186 | } | |
187 | ||
1fa61106 | 188 | static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) |
85208be0 ED |
189 | { |
190 | struct drm_device *dev = crtc->dev; | |
191 | struct drm_i915_private *dev_priv = dev->dev_private; | |
192 | struct drm_framebuffer *fb = crtc->fb; | |
193 | struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); | |
194 | struct drm_i915_gem_object *obj = intel_fb->obj; | |
195 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
196 | int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; | |
197 | unsigned long stall_watermark = 200; | |
198 | u32 dpfc_ctl; | |
199 | ||
200 | dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); | |
201 | dpfc_ctl &= DPFC_RESERVED; | |
202 | dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X); | |
203 | /* Set persistent mode for front-buffer rendering, ala X. */ | |
204 | dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE; | |
205 | dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg); | |
206 | I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY); | |
207 | ||
208 | I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | | |
209 | (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | | |
210 | (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); | |
211 | I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); | |
212 | I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID); | |
213 | /* enable it... */ | |
214 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); | |
215 | ||
216 | if (IS_GEN6(dev)) { | |
217 | I915_WRITE(SNB_DPFC_CTL_SA, | |
218 | SNB_CPU_FENCE_ENABLE | obj->fence_reg); | |
219 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); | |
220 | sandybridge_blit_fbc_update(dev); | |
221 | } | |
222 | ||
223 | DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane); | |
224 | } | |
225 | ||
1fa61106 | 226 | static void ironlake_disable_fbc(struct drm_device *dev) |
85208be0 ED |
227 | { |
228 | struct drm_i915_private *dev_priv = dev->dev_private; | |
229 | u32 dpfc_ctl; | |
230 | ||
231 | /* Disable compression */ | |
232 | dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); | |
233 | if (dpfc_ctl & DPFC_CTL_EN) { | |
234 | dpfc_ctl &= ~DPFC_CTL_EN; | |
235 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); | |
236 | ||
237 | DRM_DEBUG_KMS("disabled FBC\n"); | |
238 | } | |
239 | } | |
240 | ||
1fa61106 | 241 | static bool ironlake_fbc_enabled(struct drm_device *dev) |
85208be0 ED |
242 | { |
243 | struct drm_i915_private *dev_priv = dev->dev_private; | |
244 | ||
245 | return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; | |
246 | } | |
247 | ||
248 | bool intel_fbc_enabled(struct drm_device *dev) | |
249 | { | |
250 | struct drm_i915_private *dev_priv = dev->dev_private; | |
251 | ||
252 | if (!dev_priv->display.fbc_enabled) | |
253 | return false; | |
254 | ||
255 | return dev_priv->display.fbc_enabled(dev); | |
256 | } | |
257 | ||
258 | static void intel_fbc_work_fn(struct work_struct *__work) | |
259 | { | |
260 | struct intel_fbc_work *work = | |
261 | container_of(to_delayed_work(__work), | |
262 | struct intel_fbc_work, work); | |
263 | struct drm_device *dev = work->crtc->dev; | |
264 | struct drm_i915_private *dev_priv = dev->dev_private; | |
265 | ||
266 | mutex_lock(&dev->struct_mutex); | |
267 | if (work == dev_priv->fbc_work) { | |
268 | /* Double check that we haven't switched fb without cancelling | |
269 | * the prior work. | |
270 | */ | |
271 | if (work->crtc->fb == work->fb) { | |
272 | dev_priv->display.enable_fbc(work->crtc, | |
273 | work->interval); | |
274 | ||
275 | dev_priv->cfb_plane = to_intel_crtc(work->crtc)->plane; | |
276 | dev_priv->cfb_fb = work->crtc->fb->base.id; | |
277 | dev_priv->cfb_y = work->crtc->y; | |
278 | } | |
279 | ||
280 | dev_priv->fbc_work = NULL; | |
281 | } | |
282 | mutex_unlock(&dev->struct_mutex); | |
283 | ||
284 | kfree(work); | |
285 | } | |
286 | ||
287 | static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv) | |
288 | { | |
289 | if (dev_priv->fbc_work == NULL) | |
290 | return; | |
291 | ||
292 | DRM_DEBUG_KMS("cancelling pending FBC enable\n"); | |
293 | ||
294 | /* Synchronisation is provided by struct_mutex and checking of | |
295 | * dev_priv->fbc_work, so we can perform the cancellation | |
296 | * entirely asynchronously. | |
297 | */ | |
298 | if (cancel_delayed_work(&dev_priv->fbc_work->work)) | |
299 | /* tasklet was killed before being run, clean up */ | |
300 | kfree(dev_priv->fbc_work); | |
301 | ||
302 | /* Mark the work as no longer wanted so that if it does | |
303 | * wake-up (because the work was already running and waiting | |
304 | * for our mutex), it will discover that is no longer | |
305 | * necessary to run. | |
306 | */ | |
307 | dev_priv->fbc_work = NULL; | |
308 | } | |
309 | ||
310 | void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval) | |
311 | { | |
312 | struct intel_fbc_work *work; | |
313 | struct drm_device *dev = crtc->dev; | |
314 | struct drm_i915_private *dev_priv = dev->dev_private; | |
315 | ||
316 | if (!dev_priv->display.enable_fbc) | |
317 | return; | |
318 | ||
319 | intel_cancel_fbc_work(dev_priv); | |
320 | ||
321 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
322 | if (work == NULL) { | |
323 | dev_priv->display.enable_fbc(crtc, interval); | |
324 | return; | |
325 | } | |
326 | ||
327 | work->crtc = crtc; | |
328 | work->fb = crtc->fb; | |
329 | work->interval = interval; | |
330 | INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); | |
331 | ||
332 | dev_priv->fbc_work = work; | |
333 | ||
334 | DRM_DEBUG_KMS("scheduling delayed FBC enable\n"); | |
335 | ||
336 | /* Delay the actual enabling to let pageflipping cease and the | |
337 | * display to settle before starting the compression. Note that | |
338 | * this delay also serves a second purpose: it allows for a | |
339 | * vblank to pass after disabling the FBC before we attempt | |
340 | * to modify the control registers. | |
341 | * | |
342 | * A more complicated solution would involve tracking vblanks | |
343 | * following the termination of the page-flipping sequence | |
344 | * and indeed performing the enable as a co-routine and not | |
345 | * waiting synchronously upon the vblank. | |
346 | */ | |
347 | schedule_delayed_work(&work->work, msecs_to_jiffies(50)); | |
348 | } | |
349 | ||
350 | void intel_disable_fbc(struct drm_device *dev) | |
351 | { | |
352 | struct drm_i915_private *dev_priv = dev->dev_private; | |
353 | ||
354 | intel_cancel_fbc_work(dev_priv); | |
355 | ||
356 | if (!dev_priv->display.disable_fbc) | |
357 | return; | |
358 | ||
359 | dev_priv->display.disable_fbc(dev); | |
360 | dev_priv->cfb_plane = -1; | |
361 | } | |
362 | ||
363 | /** | |
364 | * intel_update_fbc - enable/disable FBC as needed | |
365 | * @dev: the drm_device | |
366 | * | |
367 | * Set up the framebuffer compression hardware at mode set time. We | |
368 | * enable it if possible: | |
369 | * - plane A only (on pre-965) | |
370 | * - no pixel mulitply/line duplication | |
371 | * - no alpha buffer discard | |
372 | * - no dual wide | |
373 | * - framebuffer <= 2048 in width, 1536 in height | |
374 | * | |
375 | * We can't assume that any compression will take place (worst case), | |
376 | * so the compressed buffer has to be the same size as the uncompressed | |
377 | * one. It also must reside (along with the line length buffer) in | |
378 | * stolen memory. | |
379 | * | |
380 | * We need to enable/disable FBC on a global basis. | |
381 | */ | |
382 | void intel_update_fbc(struct drm_device *dev) | |
383 | { | |
384 | struct drm_i915_private *dev_priv = dev->dev_private; | |
385 | struct drm_crtc *crtc = NULL, *tmp_crtc; | |
386 | struct intel_crtc *intel_crtc; | |
387 | struct drm_framebuffer *fb; | |
388 | struct intel_framebuffer *intel_fb; | |
389 | struct drm_i915_gem_object *obj; | |
390 | int enable_fbc; | |
391 | ||
85208be0 ED |
392 | if (!i915_powersave) |
393 | return; | |
394 | ||
395 | if (!I915_HAS_FBC(dev)) | |
396 | return; | |
397 | ||
398 | /* | |
399 | * If FBC is already on, we just have to verify that we can | |
400 | * keep it that way... | |
401 | * Need to disable if: | |
402 | * - more than one pipe is active | |
403 | * - changing FBC params (stride, fence, mode) | |
404 | * - new fb is too large to fit in compressed buffer | |
405 | * - going to an unsupported config (interlace, pixel multiply, etc.) | |
406 | */ | |
407 | list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) { | |
f20e0b08 | 408 | if (to_intel_crtc(tmp_crtc)->active && |
93314b5b CW |
409 | !to_intel_crtc(tmp_crtc)->primary_disabled && |
410 | tmp_crtc->fb) { | |
85208be0 ED |
411 | if (crtc) { |
412 | DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); | |
413 | dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES; | |
414 | goto out_disable; | |
415 | } | |
416 | crtc = tmp_crtc; | |
417 | } | |
418 | } | |
419 | ||
420 | if (!crtc || crtc->fb == NULL) { | |
421 | DRM_DEBUG_KMS("no output, disabling\n"); | |
422 | dev_priv->no_fbc_reason = FBC_NO_OUTPUT; | |
423 | goto out_disable; | |
424 | } | |
425 | ||
426 | intel_crtc = to_intel_crtc(crtc); | |
427 | fb = crtc->fb; | |
428 | intel_fb = to_intel_framebuffer(fb); | |
429 | obj = intel_fb->obj; | |
430 | ||
431 | enable_fbc = i915_enable_fbc; | |
432 | if (enable_fbc < 0) { | |
433 | DRM_DEBUG_KMS("fbc set to per-chip default\n"); | |
434 | enable_fbc = 1; | |
435 | if (INTEL_INFO(dev)->gen <= 6) | |
436 | enable_fbc = 0; | |
437 | } | |
438 | if (!enable_fbc) { | |
439 | DRM_DEBUG_KMS("fbc disabled per module param\n"); | |
440 | dev_priv->no_fbc_reason = FBC_MODULE_PARAM; | |
441 | goto out_disable; | |
442 | } | |
85208be0 ED |
443 | if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) || |
444 | (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) { | |
445 | DRM_DEBUG_KMS("mode incompatible with compression, " | |
446 | "disabling\n"); | |
447 | dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE; | |
448 | goto out_disable; | |
449 | } | |
450 | if ((crtc->mode.hdisplay > 2048) || | |
451 | (crtc->mode.vdisplay > 1536)) { | |
452 | DRM_DEBUG_KMS("mode too large for compression, disabling\n"); | |
453 | dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE; | |
454 | goto out_disable; | |
455 | } | |
456 | if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) { | |
457 | DRM_DEBUG_KMS("plane not 0, disabling compression\n"); | |
458 | dev_priv->no_fbc_reason = FBC_BAD_PLANE; | |
459 | goto out_disable; | |
460 | } | |
461 | ||
462 | /* The use of a CPU fence is mandatory in order to detect writes | |
463 | * by the CPU to the scanout and trigger updates to the FBC. | |
464 | */ | |
465 | if (obj->tiling_mode != I915_TILING_X || | |
466 | obj->fence_reg == I915_FENCE_REG_NONE) { | |
467 | DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n"); | |
468 | dev_priv->no_fbc_reason = FBC_NOT_TILED; | |
469 | goto out_disable; | |
470 | } | |
471 | ||
472 | /* If the kernel debugger is active, always disable compression */ | |
473 | if (in_dbg_master()) | |
474 | goto out_disable; | |
475 | ||
11be49eb CW |
476 | if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) { |
477 | DRM_INFO("not enough stolen space for compressed buffer (need %zd bytes), disabling\n", intel_fb->obj->base.size); | |
478 | DRM_INFO("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); | |
479 | DRM_DEBUG_KMS("framebuffer too large, disabling compression\n"); | |
480 | dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; | |
481 | goto out_disable; | |
482 | } | |
483 | ||
85208be0 ED |
484 | /* If the scanout has not changed, don't modify the FBC settings. |
485 | * Note that we make the fundamental assumption that the fb->obj | |
486 | * cannot be unpinned (and have its GTT offset and fence revoked) | |
487 | * without first being decoupled from the scanout and FBC disabled. | |
488 | */ | |
489 | if (dev_priv->cfb_plane == intel_crtc->plane && | |
490 | dev_priv->cfb_fb == fb->base.id && | |
491 | dev_priv->cfb_y == crtc->y) | |
492 | return; | |
493 | ||
494 | if (intel_fbc_enabled(dev)) { | |
495 | /* We update FBC along two paths, after changing fb/crtc | |
496 | * configuration (modeswitching) and after page-flipping | |
497 | * finishes. For the latter, we know that not only did | |
498 | * we disable the FBC at the start of the page-flip | |
499 | * sequence, but also more than one vblank has passed. | |
500 | * | |
501 | * For the former case of modeswitching, it is possible | |
502 | * to switch between two FBC valid configurations | |
503 | * instantaneously so we do need to disable the FBC | |
504 | * before we can modify its control registers. We also | |
505 | * have to wait for the next vblank for that to take | |
506 | * effect. However, since we delay enabling FBC we can | |
507 | * assume that a vblank has passed since disabling and | |
508 | * that we can safely alter the registers in the deferred | |
509 | * callback. | |
510 | * | |
511 | * In the scenario that we go from a valid to invalid | |
512 | * and then back to valid FBC configuration we have | |
513 | * no strict enforcement that a vblank occurred since | |
514 | * disabling the FBC. However, along all current pipe | |
515 | * disabling paths we do need to wait for a vblank at | |
516 | * some point. And we wait before enabling FBC anyway. | |
517 | */ | |
518 | DRM_DEBUG_KMS("disabling active FBC for update\n"); | |
519 | intel_disable_fbc(dev); | |
520 | } | |
521 | ||
522 | intel_enable_fbc(crtc, 500); | |
523 | return; | |
524 | ||
525 | out_disable: | |
526 | /* Multiple disables should be harmless */ | |
527 | if (intel_fbc_enabled(dev)) { | |
528 | DRM_DEBUG_KMS("unsupported config, disabling FBC\n"); | |
529 | intel_disable_fbc(dev); | |
530 | } | |
11be49eb | 531 | i915_gem_stolen_cleanup_compression(dev); |
85208be0 ED |
532 | } |
533 | ||
c921aba8 DV |
534 | static void i915_pineview_get_mem_freq(struct drm_device *dev) |
535 | { | |
536 | drm_i915_private_t *dev_priv = dev->dev_private; | |
537 | u32 tmp; | |
538 | ||
539 | tmp = I915_READ(CLKCFG); | |
540 | ||
541 | switch (tmp & CLKCFG_FSB_MASK) { | |
542 | case CLKCFG_FSB_533: | |
543 | dev_priv->fsb_freq = 533; /* 133*4 */ | |
544 | break; | |
545 | case CLKCFG_FSB_800: | |
546 | dev_priv->fsb_freq = 800; /* 200*4 */ | |
547 | break; | |
548 | case CLKCFG_FSB_667: | |
549 | dev_priv->fsb_freq = 667; /* 167*4 */ | |
550 | break; | |
551 | case CLKCFG_FSB_400: | |
552 | dev_priv->fsb_freq = 400; /* 100*4 */ | |
553 | break; | |
554 | } | |
555 | ||
556 | switch (tmp & CLKCFG_MEM_MASK) { | |
557 | case CLKCFG_MEM_533: | |
558 | dev_priv->mem_freq = 533; | |
559 | break; | |
560 | case CLKCFG_MEM_667: | |
561 | dev_priv->mem_freq = 667; | |
562 | break; | |
563 | case CLKCFG_MEM_800: | |
564 | dev_priv->mem_freq = 800; | |
565 | break; | |
566 | } | |
567 | ||
568 | /* detect pineview DDR3 setting */ | |
569 | tmp = I915_READ(CSHRDDR3CTL); | |
570 | dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0; | |
571 | } | |
572 | ||
573 | static void i915_ironlake_get_mem_freq(struct drm_device *dev) | |
574 | { | |
575 | drm_i915_private_t *dev_priv = dev->dev_private; | |
576 | u16 ddrpll, csipll; | |
577 | ||
578 | ddrpll = I915_READ16(DDRMPLL1); | |
579 | csipll = I915_READ16(CSIPLL0); | |
580 | ||
581 | switch (ddrpll & 0xff) { | |
582 | case 0xc: | |
583 | dev_priv->mem_freq = 800; | |
584 | break; | |
585 | case 0x10: | |
586 | dev_priv->mem_freq = 1066; | |
587 | break; | |
588 | case 0x14: | |
589 | dev_priv->mem_freq = 1333; | |
590 | break; | |
591 | case 0x18: | |
592 | dev_priv->mem_freq = 1600; | |
593 | break; | |
594 | default: | |
595 | DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n", | |
596 | ddrpll & 0xff); | |
597 | dev_priv->mem_freq = 0; | |
598 | break; | |
599 | } | |
600 | ||
20e4d407 | 601 | dev_priv->ips.r_t = dev_priv->mem_freq; |
c921aba8 DV |
602 | |
603 | switch (csipll & 0x3ff) { | |
604 | case 0x00c: | |
605 | dev_priv->fsb_freq = 3200; | |
606 | break; | |
607 | case 0x00e: | |
608 | dev_priv->fsb_freq = 3733; | |
609 | break; | |
610 | case 0x010: | |
611 | dev_priv->fsb_freq = 4266; | |
612 | break; | |
613 | case 0x012: | |
614 | dev_priv->fsb_freq = 4800; | |
615 | break; | |
616 | case 0x014: | |
617 | dev_priv->fsb_freq = 5333; | |
618 | break; | |
619 | case 0x016: | |
620 | dev_priv->fsb_freq = 5866; | |
621 | break; | |
622 | case 0x018: | |
623 | dev_priv->fsb_freq = 6400; | |
624 | break; | |
625 | default: | |
626 | DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n", | |
627 | csipll & 0x3ff); | |
628 | dev_priv->fsb_freq = 0; | |
629 | break; | |
630 | } | |
631 | ||
632 | if (dev_priv->fsb_freq == 3200) { | |
20e4d407 | 633 | dev_priv->ips.c_m = 0; |
c921aba8 | 634 | } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) { |
20e4d407 | 635 | dev_priv->ips.c_m = 1; |
c921aba8 | 636 | } else { |
20e4d407 | 637 | dev_priv->ips.c_m = 2; |
c921aba8 DV |
638 | } |
639 | } | |
640 | ||
b445e3b0 ED |
641 | static const struct cxsr_latency cxsr_latency_table[] = { |
642 | {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */ | |
643 | {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */ | |
644 | {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */ | |
645 | {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */ | |
646 | {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */ | |
647 | ||
648 | {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */ | |
649 | {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */ | |
650 | {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */ | |
651 | {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */ | |
652 | {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */ | |
653 | ||
654 | {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */ | |
655 | {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */ | |
656 | {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */ | |
657 | {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */ | |
658 | {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */ | |
659 | ||
660 | {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */ | |
661 | {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */ | |
662 | {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */ | |
663 | {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */ | |
664 | {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */ | |
665 | ||
666 | {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */ | |
667 | {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */ | |
668 | {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */ | |
669 | {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */ | |
670 | {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */ | |
671 | ||
672 | {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */ | |
673 | {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */ | |
674 | {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */ | |
675 | {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */ | |
676 | {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */ | |
677 | }; | |
678 | ||
63c62275 | 679 | static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop, |
b445e3b0 ED |
680 | int is_ddr3, |
681 | int fsb, | |
682 | int mem) | |
683 | { | |
684 | const struct cxsr_latency *latency; | |
685 | int i; | |
686 | ||
687 | if (fsb == 0 || mem == 0) | |
688 | return NULL; | |
689 | ||
690 | for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) { | |
691 | latency = &cxsr_latency_table[i]; | |
692 | if (is_desktop == latency->is_desktop && | |
693 | is_ddr3 == latency->is_ddr3 && | |
694 | fsb == latency->fsb_freq && mem == latency->mem_freq) | |
695 | return latency; | |
696 | } | |
697 | ||
698 | DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); | |
699 | ||
700 | return NULL; | |
701 | } | |
702 | ||
1fa61106 | 703 | static void pineview_disable_cxsr(struct drm_device *dev) |
b445e3b0 ED |
704 | { |
705 | struct drm_i915_private *dev_priv = dev->dev_private; | |
706 | ||
707 | /* deactivate cxsr */ | |
708 | I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN); | |
709 | } | |
710 | ||
711 | /* | |
712 | * Latency for FIFO fetches is dependent on several factors: | |
713 | * - memory configuration (speed, channels) | |
714 | * - chipset | |
715 | * - current MCH state | |
716 | * It can be fairly high in some situations, so here we assume a fairly | |
717 | * pessimal value. It's a tradeoff between extra memory fetches (if we | |
718 | * set this value too high, the FIFO will fetch frequently to stay full) | |
719 | * and power consumption (set it too low to save power and we might see | |
720 | * FIFO underruns and display "flicker"). | |
721 | * | |
722 | * A value of 5us seems to be a good balance; safe for very low end | |
723 | * platforms but not overly aggressive on lower latency configs. | |
724 | */ | |
725 | static const int latency_ns = 5000; | |
726 | ||
1fa61106 | 727 | static int i9xx_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
728 | { |
729 | struct drm_i915_private *dev_priv = dev->dev_private; | |
730 | uint32_t dsparb = I915_READ(DSPARB); | |
731 | int size; | |
732 | ||
733 | size = dsparb & 0x7f; | |
734 | if (plane) | |
735 | size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size; | |
736 | ||
737 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
738 | plane ? "B" : "A", size); | |
739 | ||
740 | return size; | |
741 | } | |
742 | ||
1fa61106 | 743 | static int i85x_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
744 | { |
745 | struct drm_i915_private *dev_priv = dev->dev_private; | |
746 | uint32_t dsparb = I915_READ(DSPARB); | |
747 | int size; | |
748 | ||
749 | size = dsparb & 0x1ff; | |
750 | if (plane) | |
751 | size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size; | |
752 | size >>= 1; /* Convert to cachelines */ | |
753 | ||
754 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
755 | plane ? "B" : "A", size); | |
756 | ||
757 | return size; | |
758 | } | |
759 | ||
1fa61106 | 760 | static int i845_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
761 | { |
762 | struct drm_i915_private *dev_priv = dev->dev_private; | |
763 | uint32_t dsparb = I915_READ(DSPARB); | |
764 | int size; | |
765 | ||
766 | size = dsparb & 0x7f; | |
767 | size >>= 2; /* Convert to cachelines */ | |
768 | ||
769 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
770 | plane ? "B" : "A", | |
771 | size); | |
772 | ||
773 | return size; | |
774 | } | |
775 | ||
1fa61106 | 776 | static int i830_get_fifo_size(struct drm_device *dev, int plane) |
b445e3b0 ED |
777 | { |
778 | struct drm_i915_private *dev_priv = dev->dev_private; | |
779 | uint32_t dsparb = I915_READ(DSPARB); | |
780 | int size; | |
781 | ||
782 | size = dsparb & 0x7f; | |
783 | size >>= 1; /* Convert to cachelines */ | |
784 | ||
785 | DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, | |
786 | plane ? "B" : "A", size); | |
787 | ||
788 | return size; | |
789 | } | |
790 | ||
791 | /* Pineview has different values for various configs */ | |
792 | static const struct intel_watermark_params pineview_display_wm = { | |
793 | PINEVIEW_DISPLAY_FIFO, | |
794 | PINEVIEW_MAX_WM, | |
795 | PINEVIEW_DFT_WM, | |
796 | PINEVIEW_GUARD_WM, | |
797 | PINEVIEW_FIFO_LINE_SIZE | |
798 | }; | |
799 | static const struct intel_watermark_params pineview_display_hplloff_wm = { | |
800 | PINEVIEW_DISPLAY_FIFO, | |
801 | PINEVIEW_MAX_WM, | |
802 | PINEVIEW_DFT_HPLLOFF_WM, | |
803 | PINEVIEW_GUARD_WM, | |
804 | PINEVIEW_FIFO_LINE_SIZE | |
805 | }; | |
806 | static const struct intel_watermark_params pineview_cursor_wm = { | |
807 | PINEVIEW_CURSOR_FIFO, | |
808 | PINEVIEW_CURSOR_MAX_WM, | |
809 | PINEVIEW_CURSOR_DFT_WM, | |
810 | PINEVIEW_CURSOR_GUARD_WM, | |
811 | PINEVIEW_FIFO_LINE_SIZE, | |
812 | }; | |
813 | static const struct intel_watermark_params pineview_cursor_hplloff_wm = { | |
814 | PINEVIEW_CURSOR_FIFO, | |
815 | PINEVIEW_CURSOR_MAX_WM, | |
816 | PINEVIEW_CURSOR_DFT_WM, | |
817 | PINEVIEW_CURSOR_GUARD_WM, | |
818 | PINEVIEW_FIFO_LINE_SIZE | |
819 | }; | |
820 | static const struct intel_watermark_params g4x_wm_info = { | |
821 | G4X_FIFO_SIZE, | |
822 | G4X_MAX_WM, | |
823 | G4X_MAX_WM, | |
824 | 2, | |
825 | G4X_FIFO_LINE_SIZE, | |
826 | }; | |
827 | static const struct intel_watermark_params g4x_cursor_wm_info = { | |
828 | I965_CURSOR_FIFO, | |
829 | I965_CURSOR_MAX_WM, | |
830 | I965_CURSOR_DFT_WM, | |
831 | 2, | |
832 | G4X_FIFO_LINE_SIZE, | |
833 | }; | |
834 | static const struct intel_watermark_params valleyview_wm_info = { | |
835 | VALLEYVIEW_FIFO_SIZE, | |
836 | VALLEYVIEW_MAX_WM, | |
837 | VALLEYVIEW_MAX_WM, | |
838 | 2, | |
839 | G4X_FIFO_LINE_SIZE, | |
840 | }; | |
841 | static const struct intel_watermark_params valleyview_cursor_wm_info = { | |
842 | I965_CURSOR_FIFO, | |
843 | VALLEYVIEW_CURSOR_MAX_WM, | |
844 | I965_CURSOR_DFT_WM, | |
845 | 2, | |
846 | G4X_FIFO_LINE_SIZE, | |
847 | }; | |
848 | static const struct intel_watermark_params i965_cursor_wm_info = { | |
849 | I965_CURSOR_FIFO, | |
850 | I965_CURSOR_MAX_WM, | |
851 | I965_CURSOR_DFT_WM, | |
852 | 2, | |
853 | I915_FIFO_LINE_SIZE, | |
854 | }; | |
855 | static const struct intel_watermark_params i945_wm_info = { | |
856 | I945_FIFO_SIZE, | |
857 | I915_MAX_WM, | |
858 | 1, | |
859 | 2, | |
860 | I915_FIFO_LINE_SIZE | |
861 | }; | |
862 | static const struct intel_watermark_params i915_wm_info = { | |
863 | I915_FIFO_SIZE, | |
864 | I915_MAX_WM, | |
865 | 1, | |
866 | 2, | |
867 | I915_FIFO_LINE_SIZE | |
868 | }; | |
869 | static const struct intel_watermark_params i855_wm_info = { | |
870 | I855GM_FIFO_SIZE, | |
871 | I915_MAX_WM, | |
872 | 1, | |
873 | 2, | |
874 | I830_FIFO_LINE_SIZE | |
875 | }; | |
876 | static const struct intel_watermark_params i830_wm_info = { | |
877 | I830_FIFO_SIZE, | |
878 | I915_MAX_WM, | |
879 | 1, | |
880 | 2, | |
881 | I830_FIFO_LINE_SIZE | |
882 | }; | |
883 | ||
884 | static const struct intel_watermark_params ironlake_display_wm_info = { | |
885 | ILK_DISPLAY_FIFO, | |
886 | ILK_DISPLAY_MAXWM, | |
887 | ILK_DISPLAY_DFTWM, | |
888 | 2, | |
889 | ILK_FIFO_LINE_SIZE | |
890 | }; | |
891 | static const struct intel_watermark_params ironlake_cursor_wm_info = { | |
892 | ILK_CURSOR_FIFO, | |
893 | ILK_CURSOR_MAXWM, | |
894 | ILK_CURSOR_DFTWM, | |
895 | 2, | |
896 | ILK_FIFO_LINE_SIZE | |
897 | }; | |
898 | static const struct intel_watermark_params ironlake_display_srwm_info = { | |
899 | ILK_DISPLAY_SR_FIFO, | |
900 | ILK_DISPLAY_MAX_SRWM, | |
901 | ILK_DISPLAY_DFT_SRWM, | |
902 | 2, | |
903 | ILK_FIFO_LINE_SIZE | |
904 | }; | |
905 | static const struct intel_watermark_params ironlake_cursor_srwm_info = { | |
906 | ILK_CURSOR_SR_FIFO, | |
907 | ILK_CURSOR_MAX_SRWM, | |
908 | ILK_CURSOR_DFT_SRWM, | |
909 | 2, | |
910 | ILK_FIFO_LINE_SIZE | |
911 | }; | |
912 | ||
913 | static const struct intel_watermark_params sandybridge_display_wm_info = { | |
914 | SNB_DISPLAY_FIFO, | |
915 | SNB_DISPLAY_MAXWM, | |
916 | SNB_DISPLAY_DFTWM, | |
917 | 2, | |
918 | SNB_FIFO_LINE_SIZE | |
919 | }; | |
920 | static const struct intel_watermark_params sandybridge_cursor_wm_info = { | |
921 | SNB_CURSOR_FIFO, | |
922 | SNB_CURSOR_MAXWM, | |
923 | SNB_CURSOR_DFTWM, | |
924 | 2, | |
925 | SNB_FIFO_LINE_SIZE | |
926 | }; | |
927 | static const struct intel_watermark_params sandybridge_display_srwm_info = { | |
928 | SNB_DISPLAY_SR_FIFO, | |
929 | SNB_DISPLAY_MAX_SRWM, | |
930 | SNB_DISPLAY_DFT_SRWM, | |
931 | 2, | |
932 | SNB_FIFO_LINE_SIZE | |
933 | }; | |
934 | static const struct intel_watermark_params sandybridge_cursor_srwm_info = { | |
935 | SNB_CURSOR_SR_FIFO, | |
936 | SNB_CURSOR_MAX_SRWM, | |
937 | SNB_CURSOR_DFT_SRWM, | |
938 | 2, | |
939 | SNB_FIFO_LINE_SIZE | |
940 | }; | |
941 | ||
942 | ||
943 | /** | |
944 | * intel_calculate_wm - calculate watermark level | |
945 | * @clock_in_khz: pixel clock | |
946 | * @wm: chip FIFO params | |
947 | * @pixel_size: display pixel size | |
948 | * @latency_ns: memory latency for the platform | |
949 | * | |
950 | * Calculate the watermark level (the level at which the display plane will | |
951 | * start fetching from memory again). Each chip has a different display | |
952 | * FIFO size and allocation, so the caller needs to figure that out and pass | |
953 | * in the correct intel_watermark_params structure. | |
954 | * | |
955 | * As the pixel clock runs, the FIFO will be drained at a rate that depends | |
956 | * on the pixel size. When it reaches the watermark level, it'll start | |
957 | * fetching FIFO line sized based chunks from memory until the FIFO fills | |
958 | * past the watermark point. If the FIFO drains completely, a FIFO underrun | |
959 | * will occur, and a display engine hang could result. | |
960 | */ | |
961 | static unsigned long intel_calculate_wm(unsigned long clock_in_khz, | |
962 | const struct intel_watermark_params *wm, | |
963 | int fifo_size, | |
964 | int pixel_size, | |
965 | unsigned long latency_ns) | |
966 | { | |
967 | long entries_required, wm_size; | |
968 | ||
969 | /* | |
970 | * Note: we need to make sure we don't overflow for various clock & | |
971 | * latency values. | |
972 | * clocks go from a few thousand to several hundred thousand. | |
973 | * latency is usually a few thousand | |
974 | */ | |
975 | entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) / | |
976 | 1000; | |
977 | entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size); | |
978 | ||
979 | DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required); | |
980 | ||
981 | wm_size = fifo_size - (entries_required + wm->guard_size); | |
982 | ||
983 | DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size); | |
984 | ||
985 | /* Don't promote wm_size to unsigned... */ | |
986 | if (wm_size > (long)wm->max_wm) | |
987 | wm_size = wm->max_wm; | |
988 | if (wm_size <= 0) | |
989 | wm_size = wm->default_wm; | |
990 | return wm_size; | |
991 | } | |
992 | ||
993 | static struct drm_crtc *single_enabled_crtc(struct drm_device *dev) | |
994 | { | |
995 | struct drm_crtc *crtc, *enabled = NULL; | |
996 | ||
997 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
f20e0b08 | 998 | if (to_intel_crtc(crtc)->active && crtc->fb) { |
b445e3b0 ED |
999 | if (enabled) |
1000 | return NULL; | |
1001 | enabled = crtc; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | return enabled; | |
1006 | } | |
1007 | ||
1fa61106 | 1008 | static void pineview_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1009 | { |
1010 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1011 | struct drm_crtc *crtc; | |
1012 | const struct cxsr_latency *latency; | |
1013 | u32 reg; | |
1014 | unsigned long wm; | |
1015 | ||
1016 | latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3, | |
1017 | dev_priv->fsb_freq, dev_priv->mem_freq); | |
1018 | if (!latency) { | |
1019 | DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); | |
1020 | pineview_disable_cxsr(dev); | |
1021 | return; | |
1022 | } | |
1023 | ||
1024 | crtc = single_enabled_crtc(dev); | |
1025 | if (crtc) { | |
1026 | int clock = crtc->mode.clock; | |
1027 | int pixel_size = crtc->fb->bits_per_pixel / 8; | |
1028 | ||
1029 | /* Display SR */ | |
1030 | wm = intel_calculate_wm(clock, &pineview_display_wm, | |
1031 | pineview_display_wm.fifo_size, | |
1032 | pixel_size, latency->display_sr); | |
1033 | reg = I915_READ(DSPFW1); | |
1034 | reg &= ~DSPFW_SR_MASK; | |
1035 | reg |= wm << DSPFW_SR_SHIFT; | |
1036 | I915_WRITE(DSPFW1, reg); | |
1037 | DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg); | |
1038 | ||
1039 | /* cursor SR */ | |
1040 | wm = intel_calculate_wm(clock, &pineview_cursor_wm, | |
1041 | pineview_display_wm.fifo_size, | |
1042 | pixel_size, latency->cursor_sr); | |
1043 | reg = I915_READ(DSPFW3); | |
1044 | reg &= ~DSPFW_CURSOR_SR_MASK; | |
1045 | reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT; | |
1046 | I915_WRITE(DSPFW3, reg); | |
1047 | ||
1048 | /* Display HPLL off SR */ | |
1049 | wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm, | |
1050 | pineview_display_hplloff_wm.fifo_size, | |
1051 | pixel_size, latency->display_hpll_disable); | |
1052 | reg = I915_READ(DSPFW3); | |
1053 | reg &= ~DSPFW_HPLL_SR_MASK; | |
1054 | reg |= wm & DSPFW_HPLL_SR_MASK; | |
1055 | I915_WRITE(DSPFW3, reg); | |
1056 | ||
1057 | /* cursor HPLL off SR */ | |
1058 | wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm, | |
1059 | pineview_display_hplloff_wm.fifo_size, | |
1060 | pixel_size, latency->cursor_hpll_disable); | |
1061 | reg = I915_READ(DSPFW3); | |
1062 | reg &= ~DSPFW_HPLL_CURSOR_MASK; | |
1063 | reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT; | |
1064 | I915_WRITE(DSPFW3, reg); | |
1065 | DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg); | |
1066 | ||
1067 | /* activate cxsr */ | |
1068 | I915_WRITE(DSPFW3, | |
1069 | I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN); | |
1070 | DRM_DEBUG_KMS("Self-refresh is enabled\n"); | |
1071 | } else { | |
1072 | pineview_disable_cxsr(dev); | |
1073 | DRM_DEBUG_KMS("Self-refresh is disabled\n"); | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | static bool g4x_compute_wm0(struct drm_device *dev, | |
1078 | int plane, | |
1079 | const struct intel_watermark_params *display, | |
1080 | int display_latency_ns, | |
1081 | const struct intel_watermark_params *cursor, | |
1082 | int cursor_latency_ns, | |
1083 | int *plane_wm, | |
1084 | int *cursor_wm) | |
1085 | { | |
1086 | struct drm_crtc *crtc; | |
1087 | int htotal, hdisplay, clock, pixel_size; | |
1088 | int line_time_us, line_count; | |
1089 | int entries, tlb_miss; | |
1090 | ||
1091 | crtc = intel_get_crtc_for_plane(dev, plane); | |
f20e0b08 | 1092 | if (crtc->fb == NULL || !to_intel_crtc(crtc)->active) { |
b445e3b0 ED |
1093 | *cursor_wm = cursor->guard_size; |
1094 | *plane_wm = display->guard_size; | |
1095 | return false; | |
1096 | } | |
1097 | ||
1098 | htotal = crtc->mode.htotal; | |
1099 | hdisplay = crtc->mode.hdisplay; | |
1100 | clock = crtc->mode.clock; | |
1101 | pixel_size = crtc->fb->bits_per_pixel / 8; | |
1102 | ||
1103 | /* Use the small buffer method to calculate plane watermark */ | |
1104 | entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; | |
1105 | tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8; | |
1106 | if (tlb_miss > 0) | |
1107 | entries += tlb_miss; | |
1108 | entries = DIV_ROUND_UP(entries, display->cacheline_size); | |
1109 | *plane_wm = entries + display->guard_size; | |
1110 | if (*plane_wm > (int)display->max_wm) | |
1111 | *plane_wm = display->max_wm; | |
1112 | ||
1113 | /* Use the large buffer method to calculate cursor watermark */ | |
1114 | line_time_us = ((htotal * 1000) / clock); | |
1115 | line_count = (cursor_latency_ns / line_time_us + 1000) / 1000; | |
1116 | entries = line_count * 64 * pixel_size; | |
1117 | tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8; | |
1118 | if (tlb_miss > 0) | |
1119 | entries += tlb_miss; | |
1120 | entries = DIV_ROUND_UP(entries, cursor->cacheline_size); | |
1121 | *cursor_wm = entries + cursor->guard_size; | |
1122 | if (*cursor_wm > (int)cursor->max_wm) | |
1123 | *cursor_wm = (int)cursor->max_wm; | |
1124 | ||
1125 | return true; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * Check the wm result. | |
1130 | * | |
1131 | * If any calculated watermark values is larger than the maximum value that | |
1132 | * can be programmed into the associated watermark register, that watermark | |
1133 | * must be disabled. | |
1134 | */ | |
1135 | static bool g4x_check_srwm(struct drm_device *dev, | |
1136 | int display_wm, int cursor_wm, | |
1137 | const struct intel_watermark_params *display, | |
1138 | const struct intel_watermark_params *cursor) | |
1139 | { | |
1140 | DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n", | |
1141 | display_wm, cursor_wm); | |
1142 | ||
1143 | if (display_wm > display->max_wm) { | |
1144 | DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n", | |
1145 | display_wm, display->max_wm); | |
1146 | return false; | |
1147 | } | |
1148 | ||
1149 | if (cursor_wm > cursor->max_wm) { | |
1150 | DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n", | |
1151 | cursor_wm, cursor->max_wm); | |
1152 | return false; | |
1153 | } | |
1154 | ||
1155 | if (!(display_wm || cursor_wm)) { | |
1156 | DRM_DEBUG_KMS("SR latency is 0, disabling\n"); | |
1157 | return false; | |
1158 | } | |
1159 | ||
1160 | return true; | |
1161 | } | |
1162 | ||
1163 | static bool g4x_compute_srwm(struct drm_device *dev, | |
1164 | int plane, | |
1165 | int latency_ns, | |
1166 | const struct intel_watermark_params *display, | |
1167 | const struct intel_watermark_params *cursor, | |
1168 | int *display_wm, int *cursor_wm) | |
1169 | { | |
1170 | struct drm_crtc *crtc; | |
1171 | int hdisplay, htotal, pixel_size, clock; | |
1172 | unsigned long line_time_us; | |
1173 | int line_count, line_size; | |
1174 | int small, large; | |
1175 | int entries; | |
1176 | ||
1177 | if (!latency_ns) { | |
1178 | *display_wm = *cursor_wm = 0; | |
1179 | return false; | |
1180 | } | |
1181 | ||
1182 | crtc = intel_get_crtc_for_plane(dev, plane); | |
1183 | hdisplay = crtc->mode.hdisplay; | |
1184 | htotal = crtc->mode.htotal; | |
1185 | clock = crtc->mode.clock; | |
1186 | pixel_size = crtc->fb->bits_per_pixel / 8; | |
1187 | ||
1188 | line_time_us = (htotal * 1000) / clock; | |
1189 | line_count = (latency_ns / line_time_us + 1000) / 1000; | |
1190 | line_size = hdisplay * pixel_size; | |
1191 | ||
1192 | /* Use the minimum of the small and large buffer method for primary */ | |
1193 | small = ((clock * pixel_size / 1000) * latency_ns) / 1000; | |
1194 | large = line_count * line_size; | |
1195 | ||
1196 | entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); | |
1197 | *display_wm = entries + display->guard_size; | |
1198 | ||
1199 | /* calculate the self-refresh watermark for display cursor */ | |
1200 | entries = line_count * pixel_size * 64; | |
1201 | entries = DIV_ROUND_UP(entries, cursor->cacheline_size); | |
1202 | *cursor_wm = entries + cursor->guard_size; | |
1203 | ||
1204 | return g4x_check_srwm(dev, | |
1205 | *display_wm, *cursor_wm, | |
1206 | display, cursor); | |
1207 | } | |
1208 | ||
1209 | static bool vlv_compute_drain_latency(struct drm_device *dev, | |
1210 | int plane, | |
1211 | int *plane_prec_mult, | |
1212 | int *plane_dl, | |
1213 | int *cursor_prec_mult, | |
1214 | int *cursor_dl) | |
1215 | { | |
1216 | struct drm_crtc *crtc; | |
1217 | int clock, pixel_size; | |
1218 | int entries; | |
1219 | ||
1220 | crtc = intel_get_crtc_for_plane(dev, plane); | |
f20e0b08 | 1221 | if (crtc->fb == NULL || !to_intel_crtc(crtc)->active) |
b445e3b0 ED |
1222 | return false; |
1223 | ||
1224 | clock = crtc->mode.clock; /* VESA DOT Clock */ | |
1225 | pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */ | |
1226 | ||
1227 | entries = (clock / 1000) * pixel_size; | |
1228 | *plane_prec_mult = (entries > 256) ? | |
1229 | DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; | |
1230 | *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) * | |
1231 | pixel_size); | |
1232 | ||
1233 | entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */ | |
1234 | *cursor_prec_mult = (entries > 256) ? | |
1235 | DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; | |
1236 | *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4); | |
1237 | ||
1238 | return true; | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Update drain latency registers of memory arbiter | |
1243 | * | |
1244 | * Valleyview SoC has a new memory arbiter and needs drain latency registers | |
1245 | * to be programmed. Each plane has a drain latency multiplier and a drain | |
1246 | * latency value. | |
1247 | */ | |
1248 | ||
1249 | static void vlv_update_drain_latency(struct drm_device *dev) | |
1250 | { | |
1251 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1252 | int planea_prec, planea_dl, planeb_prec, planeb_dl; | |
1253 | int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl; | |
1254 | int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is | |
1255 | either 16 or 32 */ | |
1256 | ||
1257 | /* For plane A, Cursor A */ | |
1258 | if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl, | |
1259 | &cursor_prec_mult, &cursora_dl)) { | |
1260 | cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1261 | DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16; | |
1262 | planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1263 | DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16; | |
1264 | ||
1265 | I915_WRITE(VLV_DDL1, cursora_prec | | |
1266 | (cursora_dl << DDL_CURSORA_SHIFT) | | |
1267 | planea_prec | planea_dl); | |
1268 | } | |
1269 | ||
1270 | /* For plane B, Cursor B */ | |
1271 | if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl, | |
1272 | &cursor_prec_mult, &cursorb_dl)) { | |
1273 | cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1274 | DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16; | |
1275 | planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? | |
1276 | DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16; | |
1277 | ||
1278 | I915_WRITE(VLV_DDL2, cursorb_prec | | |
1279 | (cursorb_dl << DDL_CURSORB_SHIFT) | | |
1280 | planeb_prec | planeb_dl); | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | #define single_plane_enabled(mask) is_power_of_2(mask) | |
1285 | ||
1fa61106 | 1286 | static void valleyview_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1287 | { |
1288 | static const int sr_latency_ns = 12000; | |
1289 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1290 | int planea_wm, planeb_wm, cursora_wm, cursorb_wm; | |
1291 | int plane_sr, cursor_sr; | |
af6c4575 | 1292 | int ignore_plane_sr, ignore_cursor_sr; |
b445e3b0 ED |
1293 | unsigned int enabled = 0; |
1294 | ||
1295 | vlv_update_drain_latency(dev); | |
1296 | ||
1297 | if (g4x_compute_wm0(dev, 0, | |
1298 | &valleyview_wm_info, latency_ns, | |
1299 | &valleyview_cursor_wm_info, latency_ns, | |
1300 | &planea_wm, &cursora_wm)) | |
1301 | enabled |= 1; | |
1302 | ||
1303 | if (g4x_compute_wm0(dev, 1, | |
1304 | &valleyview_wm_info, latency_ns, | |
1305 | &valleyview_cursor_wm_info, latency_ns, | |
1306 | &planeb_wm, &cursorb_wm)) | |
1307 | enabled |= 2; | |
1308 | ||
b445e3b0 ED |
1309 | if (single_plane_enabled(enabled) && |
1310 | g4x_compute_srwm(dev, ffs(enabled) - 1, | |
1311 | sr_latency_ns, | |
1312 | &valleyview_wm_info, | |
1313 | &valleyview_cursor_wm_info, | |
af6c4575 CW |
1314 | &plane_sr, &ignore_cursor_sr) && |
1315 | g4x_compute_srwm(dev, ffs(enabled) - 1, | |
1316 | 2*sr_latency_ns, | |
1317 | &valleyview_wm_info, | |
1318 | &valleyview_cursor_wm_info, | |
52bd02d8 | 1319 | &ignore_plane_sr, &cursor_sr)) { |
b445e3b0 | 1320 | I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN); |
52bd02d8 | 1321 | } else { |
b445e3b0 ED |
1322 | I915_WRITE(FW_BLC_SELF_VLV, |
1323 | I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN); | |
52bd02d8 CW |
1324 | plane_sr = cursor_sr = 0; |
1325 | } | |
b445e3b0 ED |
1326 | |
1327 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", | |
1328 | planea_wm, cursora_wm, | |
1329 | planeb_wm, cursorb_wm, | |
1330 | plane_sr, cursor_sr); | |
1331 | ||
1332 | I915_WRITE(DSPFW1, | |
1333 | (plane_sr << DSPFW_SR_SHIFT) | | |
1334 | (cursorb_wm << DSPFW_CURSORB_SHIFT) | | |
1335 | (planeb_wm << DSPFW_PLANEB_SHIFT) | | |
1336 | planea_wm); | |
1337 | I915_WRITE(DSPFW2, | |
8c919b28 | 1338 | (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | |
b445e3b0 ED |
1339 | (cursora_wm << DSPFW_CURSORA_SHIFT)); |
1340 | I915_WRITE(DSPFW3, | |
8c919b28 CW |
1341 | (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) | |
1342 | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); | |
b445e3b0 ED |
1343 | } |
1344 | ||
1fa61106 | 1345 | static void g4x_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1346 | { |
1347 | static const int sr_latency_ns = 12000; | |
1348 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1349 | int planea_wm, planeb_wm, cursora_wm, cursorb_wm; | |
1350 | int plane_sr, cursor_sr; | |
1351 | unsigned int enabled = 0; | |
1352 | ||
1353 | if (g4x_compute_wm0(dev, 0, | |
1354 | &g4x_wm_info, latency_ns, | |
1355 | &g4x_cursor_wm_info, latency_ns, | |
1356 | &planea_wm, &cursora_wm)) | |
1357 | enabled |= 1; | |
1358 | ||
1359 | if (g4x_compute_wm0(dev, 1, | |
1360 | &g4x_wm_info, latency_ns, | |
1361 | &g4x_cursor_wm_info, latency_ns, | |
1362 | &planeb_wm, &cursorb_wm)) | |
1363 | enabled |= 2; | |
1364 | ||
b445e3b0 ED |
1365 | if (single_plane_enabled(enabled) && |
1366 | g4x_compute_srwm(dev, ffs(enabled) - 1, | |
1367 | sr_latency_ns, | |
1368 | &g4x_wm_info, | |
1369 | &g4x_cursor_wm_info, | |
52bd02d8 | 1370 | &plane_sr, &cursor_sr)) { |
b445e3b0 | 1371 | I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); |
52bd02d8 | 1372 | } else { |
b445e3b0 ED |
1373 | I915_WRITE(FW_BLC_SELF, |
1374 | I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN); | |
52bd02d8 CW |
1375 | plane_sr = cursor_sr = 0; |
1376 | } | |
b445e3b0 ED |
1377 | |
1378 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", | |
1379 | planea_wm, cursora_wm, | |
1380 | planeb_wm, cursorb_wm, | |
1381 | plane_sr, cursor_sr); | |
1382 | ||
1383 | I915_WRITE(DSPFW1, | |
1384 | (plane_sr << DSPFW_SR_SHIFT) | | |
1385 | (cursorb_wm << DSPFW_CURSORB_SHIFT) | | |
1386 | (planeb_wm << DSPFW_PLANEB_SHIFT) | | |
1387 | planea_wm); | |
1388 | I915_WRITE(DSPFW2, | |
8c919b28 | 1389 | (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | |
b445e3b0 ED |
1390 | (cursora_wm << DSPFW_CURSORA_SHIFT)); |
1391 | /* HPLL off in SR has some issues on G4x... disable it */ | |
1392 | I915_WRITE(DSPFW3, | |
8c919b28 | 1393 | (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) | |
b445e3b0 ED |
1394 | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); |
1395 | } | |
1396 | ||
1fa61106 | 1397 | static void i965_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1398 | { |
1399 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1400 | struct drm_crtc *crtc; | |
1401 | int srwm = 1; | |
1402 | int cursor_sr = 16; | |
1403 | ||
1404 | /* Calc sr entries for one plane configs */ | |
1405 | crtc = single_enabled_crtc(dev); | |
1406 | if (crtc) { | |
1407 | /* self-refresh has much higher latency */ | |
1408 | static const int sr_latency_ns = 12000; | |
1409 | int clock = crtc->mode.clock; | |
1410 | int htotal = crtc->mode.htotal; | |
1411 | int hdisplay = crtc->mode.hdisplay; | |
1412 | int pixel_size = crtc->fb->bits_per_pixel / 8; | |
1413 | unsigned long line_time_us; | |
1414 | int entries; | |
1415 | ||
1416 | line_time_us = ((htotal * 1000) / clock); | |
1417 | ||
1418 | /* Use ns/us then divide to preserve precision */ | |
1419 | entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * | |
1420 | pixel_size * hdisplay; | |
1421 | entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); | |
1422 | srwm = I965_FIFO_SIZE - entries; | |
1423 | if (srwm < 0) | |
1424 | srwm = 1; | |
1425 | srwm &= 0x1ff; | |
1426 | DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n", | |
1427 | entries, srwm); | |
1428 | ||
1429 | entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * | |
1430 | pixel_size * 64; | |
1431 | entries = DIV_ROUND_UP(entries, | |
1432 | i965_cursor_wm_info.cacheline_size); | |
1433 | cursor_sr = i965_cursor_wm_info.fifo_size - | |
1434 | (entries + i965_cursor_wm_info.guard_size); | |
1435 | ||
1436 | if (cursor_sr > i965_cursor_wm_info.max_wm) | |
1437 | cursor_sr = i965_cursor_wm_info.max_wm; | |
1438 | ||
1439 | DRM_DEBUG_KMS("self-refresh watermark: display plane %d " | |
1440 | "cursor %d\n", srwm, cursor_sr); | |
1441 | ||
1442 | if (IS_CRESTLINE(dev)) | |
1443 | I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); | |
1444 | } else { | |
1445 | /* Turn off self refresh if both pipes are enabled */ | |
1446 | if (IS_CRESTLINE(dev)) | |
1447 | I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF) | |
1448 | & ~FW_BLC_SELF_EN); | |
1449 | } | |
1450 | ||
1451 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n", | |
1452 | srwm); | |
1453 | ||
1454 | /* 965 has limitations... */ | |
1455 | I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | | |
1456 | (8 << 16) | (8 << 8) | (8 << 0)); | |
1457 | I915_WRITE(DSPFW2, (8 << 8) | (8 << 0)); | |
1458 | /* update cursor SR watermark */ | |
1459 | I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); | |
1460 | } | |
1461 | ||
1fa61106 | 1462 | static void i9xx_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1463 | { |
1464 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1465 | const struct intel_watermark_params *wm_info; | |
1466 | uint32_t fwater_lo; | |
1467 | uint32_t fwater_hi; | |
1468 | int cwm, srwm = 1; | |
1469 | int fifo_size; | |
1470 | int planea_wm, planeb_wm; | |
1471 | struct drm_crtc *crtc, *enabled = NULL; | |
1472 | ||
1473 | if (IS_I945GM(dev)) | |
1474 | wm_info = &i945_wm_info; | |
1475 | else if (!IS_GEN2(dev)) | |
1476 | wm_info = &i915_wm_info; | |
1477 | else | |
1478 | wm_info = &i855_wm_info; | |
1479 | ||
1480 | fifo_size = dev_priv->display.get_fifo_size(dev, 0); | |
1481 | crtc = intel_get_crtc_for_plane(dev, 0); | |
f20e0b08 | 1482 | if (to_intel_crtc(crtc)->active && crtc->fb) { |
b9e0bda3 CW |
1483 | int cpp = crtc->fb->bits_per_pixel / 8; |
1484 | if (IS_GEN2(dev)) | |
1485 | cpp = 4; | |
1486 | ||
b445e3b0 | 1487 | planea_wm = intel_calculate_wm(crtc->mode.clock, |
b9e0bda3 | 1488 | wm_info, fifo_size, cpp, |
b445e3b0 ED |
1489 | latency_ns); |
1490 | enabled = crtc; | |
1491 | } else | |
1492 | planea_wm = fifo_size - wm_info->guard_size; | |
1493 | ||
1494 | fifo_size = dev_priv->display.get_fifo_size(dev, 1); | |
1495 | crtc = intel_get_crtc_for_plane(dev, 1); | |
f20e0b08 | 1496 | if (to_intel_crtc(crtc)->active && crtc->fb) { |
b9e0bda3 CW |
1497 | int cpp = crtc->fb->bits_per_pixel / 8; |
1498 | if (IS_GEN2(dev)) | |
1499 | cpp = 4; | |
1500 | ||
b445e3b0 | 1501 | planeb_wm = intel_calculate_wm(crtc->mode.clock, |
b9e0bda3 | 1502 | wm_info, fifo_size, cpp, |
b445e3b0 ED |
1503 | latency_ns); |
1504 | if (enabled == NULL) | |
1505 | enabled = crtc; | |
1506 | else | |
1507 | enabled = NULL; | |
1508 | } else | |
1509 | planeb_wm = fifo_size - wm_info->guard_size; | |
1510 | ||
1511 | DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm); | |
1512 | ||
1513 | /* | |
1514 | * Overlay gets an aggressive default since video jitter is bad. | |
1515 | */ | |
1516 | cwm = 2; | |
1517 | ||
1518 | /* Play safe and disable self-refresh before adjusting watermarks. */ | |
1519 | if (IS_I945G(dev) || IS_I945GM(dev)) | |
1520 | I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0); | |
1521 | else if (IS_I915GM(dev)) | |
1522 | I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN); | |
1523 | ||
1524 | /* Calc sr entries for one plane configs */ | |
1525 | if (HAS_FW_BLC(dev) && enabled) { | |
1526 | /* self-refresh has much higher latency */ | |
1527 | static const int sr_latency_ns = 6000; | |
1528 | int clock = enabled->mode.clock; | |
1529 | int htotal = enabled->mode.htotal; | |
1530 | int hdisplay = enabled->mode.hdisplay; | |
1531 | int pixel_size = enabled->fb->bits_per_pixel / 8; | |
1532 | unsigned long line_time_us; | |
1533 | int entries; | |
1534 | ||
1535 | line_time_us = (htotal * 1000) / clock; | |
1536 | ||
1537 | /* Use ns/us then divide to preserve precision */ | |
1538 | entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * | |
1539 | pixel_size * hdisplay; | |
1540 | entries = DIV_ROUND_UP(entries, wm_info->cacheline_size); | |
1541 | DRM_DEBUG_KMS("self-refresh entries: %d\n", entries); | |
1542 | srwm = wm_info->fifo_size - entries; | |
1543 | if (srwm < 0) | |
1544 | srwm = 1; | |
1545 | ||
1546 | if (IS_I945G(dev) || IS_I945GM(dev)) | |
1547 | I915_WRITE(FW_BLC_SELF, | |
1548 | FW_BLC_SELF_FIFO_MASK | (srwm & 0xff)); | |
1549 | else if (IS_I915GM(dev)) | |
1550 | I915_WRITE(FW_BLC_SELF, srwm & 0x3f); | |
1551 | } | |
1552 | ||
1553 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n", | |
1554 | planea_wm, planeb_wm, cwm, srwm); | |
1555 | ||
1556 | fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f); | |
1557 | fwater_hi = (cwm & 0x1f); | |
1558 | ||
1559 | /* Set request length to 8 cachelines per fetch */ | |
1560 | fwater_lo = fwater_lo | (1 << 24) | (1 << 8); | |
1561 | fwater_hi = fwater_hi | (1 << 8); | |
1562 | ||
1563 | I915_WRITE(FW_BLC, fwater_lo); | |
1564 | I915_WRITE(FW_BLC2, fwater_hi); | |
1565 | ||
1566 | if (HAS_FW_BLC(dev)) { | |
1567 | if (enabled) { | |
1568 | if (IS_I945G(dev) || IS_I945GM(dev)) | |
1569 | I915_WRITE(FW_BLC_SELF, | |
1570 | FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN); | |
1571 | else if (IS_I915GM(dev)) | |
1572 | I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN); | |
1573 | DRM_DEBUG_KMS("memory self refresh enabled\n"); | |
1574 | } else | |
1575 | DRM_DEBUG_KMS("memory self refresh disabled\n"); | |
1576 | } | |
1577 | } | |
1578 | ||
1fa61106 | 1579 | static void i830_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1580 | { |
1581 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1582 | struct drm_crtc *crtc; | |
1583 | uint32_t fwater_lo; | |
1584 | int planea_wm; | |
1585 | ||
1586 | crtc = single_enabled_crtc(dev); | |
1587 | if (crtc == NULL) | |
1588 | return; | |
1589 | ||
1590 | planea_wm = intel_calculate_wm(crtc->mode.clock, &i830_wm_info, | |
1591 | dev_priv->display.get_fifo_size(dev, 0), | |
b9e0bda3 | 1592 | 4, latency_ns); |
b445e3b0 ED |
1593 | fwater_lo = I915_READ(FW_BLC) & ~0xfff; |
1594 | fwater_lo |= (3<<8) | planea_wm; | |
1595 | ||
1596 | DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm); | |
1597 | ||
1598 | I915_WRITE(FW_BLC, fwater_lo); | |
1599 | } | |
1600 | ||
1601 | #define ILK_LP0_PLANE_LATENCY 700 | |
1602 | #define ILK_LP0_CURSOR_LATENCY 1300 | |
1603 | ||
1604 | /* | |
1605 | * Check the wm result. | |
1606 | * | |
1607 | * If any calculated watermark values is larger than the maximum value that | |
1608 | * can be programmed into the associated watermark register, that watermark | |
1609 | * must be disabled. | |
1610 | */ | |
1611 | static bool ironlake_check_srwm(struct drm_device *dev, int level, | |
1612 | int fbc_wm, int display_wm, int cursor_wm, | |
1613 | const struct intel_watermark_params *display, | |
1614 | const struct intel_watermark_params *cursor) | |
1615 | { | |
1616 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1617 | ||
1618 | DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d," | |
1619 | " cursor %d\n", level, display_wm, fbc_wm, cursor_wm); | |
1620 | ||
1621 | if (fbc_wm > SNB_FBC_MAX_SRWM) { | |
1622 | DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n", | |
1623 | fbc_wm, SNB_FBC_MAX_SRWM, level); | |
1624 | ||
1625 | /* fbc has it's own way to disable FBC WM */ | |
1626 | I915_WRITE(DISP_ARB_CTL, | |
1627 | I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS); | |
1628 | return false; | |
1629 | } | |
1630 | ||
1631 | if (display_wm > display->max_wm) { | |
1632 | DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n", | |
1633 | display_wm, SNB_DISPLAY_MAX_SRWM, level); | |
1634 | return false; | |
1635 | } | |
1636 | ||
1637 | if (cursor_wm > cursor->max_wm) { | |
1638 | DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n", | |
1639 | cursor_wm, SNB_CURSOR_MAX_SRWM, level); | |
1640 | return false; | |
1641 | } | |
1642 | ||
1643 | if (!(fbc_wm || display_wm || cursor_wm)) { | |
1644 | DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level); | |
1645 | return false; | |
1646 | } | |
1647 | ||
1648 | return true; | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * Compute watermark values of WM[1-3], | |
1653 | */ | |
1654 | static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane, | |
1655 | int latency_ns, | |
1656 | const struct intel_watermark_params *display, | |
1657 | const struct intel_watermark_params *cursor, | |
1658 | int *fbc_wm, int *display_wm, int *cursor_wm) | |
1659 | { | |
1660 | struct drm_crtc *crtc; | |
1661 | unsigned long line_time_us; | |
1662 | int hdisplay, htotal, pixel_size, clock; | |
1663 | int line_count, line_size; | |
1664 | int small, large; | |
1665 | int entries; | |
1666 | ||
1667 | if (!latency_ns) { | |
1668 | *fbc_wm = *display_wm = *cursor_wm = 0; | |
1669 | return false; | |
1670 | } | |
1671 | ||
1672 | crtc = intel_get_crtc_for_plane(dev, plane); | |
1673 | hdisplay = crtc->mode.hdisplay; | |
1674 | htotal = crtc->mode.htotal; | |
1675 | clock = crtc->mode.clock; | |
1676 | pixel_size = crtc->fb->bits_per_pixel / 8; | |
1677 | ||
1678 | line_time_us = (htotal * 1000) / clock; | |
1679 | line_count = (latency_ns / line_time_us + 1000) / 1000; | |
1680 | line_size = hdisplay * pixel_size; | |
1681 | ||
1682 | /* Use the minimum of the small and large buffer method for primary */ | |
1683 | small = ((clock * pixel_size / 1000) * latency_ns) / 1000; | |
1684 | large = line_count * line_size; | |
1685 | ||
1686 | entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); | |
1687 | *display_wm = entries + display->guard_size; | |
1688 | ||
1689 | /* | |
1690 | * Spec says: | |
1691 | * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2 | |
1692 | */ | |
1693 | *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2; | |
1694 | ||
1695 | /* calculate the self-refresh watermark for display cursor */ | |
1696 | entries = line_count * pixel_size * 64; | |
1697 | entries = DIV_ROUND_UP(entries, cursor->cacheline_size); | |
1698 | *cursor_wm = entries + cursor->guard_size; | |
1699 | ||
1700 | return ironlake_check_srwm(dev, level, | |
1701 | *fbc_wm, *display_wm, *cursor_wm, | |
1702 | display, cursor); | |
1703 | } | |
1704 | ||
1fa61106 | 1705 | static void ironlake_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1706 | { |
1707 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1708 | int fbc_wm, plane_wm, cursor_wm; | |
1709 | unsigned int enabled; | |
1710 | ||
1711 | enabled = 0; | |
1712 | if (g4x_compute_wm0(dev, 0, | |
1713 | &ironlake_display_wm_info, | |
1714 | ILK_LP0_PLANE_LATENCY, | |
1715 | &ironlake_cursor_wm_info, | |
1716 | ILK_LP0_CURSOR_LATENCY, | |
1717 | &plane_wm, &cursor_wm)) { | |
1718 | I915_WRITE(WM0_PIPEA_ILK, | |
1719 | (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm); | |
1720 | DRM_DEBUG_KMS("FIFO watermarks For pipe A -" | |
1721 | " plane %d, " "cursor: %d\n", | |
1722 | plane_wm, cursor_wm); | |
1723 | enabled |= 1; | |
1724 | } | |
1725 | ||
1726 | if (g4x_compute_wm0(dev, 1, | |
1727 | &ironlake_display_wm_info, | |
1728 | ILK_LP0_PLANE_LATENCY, | |
1729 | &ironlake_cursor_wm_info, | |
1730 | ILK_LP0_CURSOR_LATENCY, | |
1731 | &plane_wm, &cursor_wm)) { | |
1732 | I915_WRITE(WM0_PIPEB_ILK, | |
1733 | (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm); | |
1734 | DRM_DEBUG_KMS("FIFO watermarks For pipe B -" | |
1735 | " plane %d, cursor: %d\n", | |
1736 | plane_wm, cursor_wm); | |
1737 | enabled |= 2; | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * Calculate and update the self-refresh watermark only when one | |
1742 | * display plane is used. | |
1743 | */ | |
1744 | I915_WRITE(WM3_LP_ILK, 0); | |
1745 | I915_WRITE(WM2_LP_ILK, 0); | |
1746 | I915_WRITE(WM1_LP_ILK, 0); | |
1747 | ||
1748 | if (!single_plane_enabled(enabled)) | |
1749 | return; | |
1750 | enabled = ffs(enabled) - 1; | |
1751 | ||
1752 | /* WM1 */ | |
1753 | if (!ironlake_compute_srwm(dev, 1, enabled, | |
1754 | ILK_READ_WM1_LATENCY() * 500, | |
1755 | &ironlake_display_srwm_info, | |
1756 | &ironlake_cursor_srwm_info, | |
1757 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1758 | return; | |
1759 | ||
1760 | I915_WRITE(WM1_LP_ILK, | |
1761 | WM1_LP_SR_EN | | |
1762 | (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1763 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1764 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1765 | cursor_wm); | |
1766 | ||
1767 | /* WM2 */ | |
1768 | if (!ironlake_compute_srwm(dev, 2, enabled, | |
1769 | ILK_READ_WM2_LATENCY() * 500, | |
1770 | &ironlake_display_srwm_info, | |
1771 | &ironlake_cursor_srwm_info, | |
1772 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1773 | return; | |
1774 | ||
1775 | I915_WRITE(WM2_LP_ILK, | |
1776 | WM2_LP_EN | | |
1777 | (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1778 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1779 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1780 | cursor_wm); | |
1781 | ||
1782 | /* | |
1783 | * WM3 is unsupported on ILK, probably because we don't have latency | |
1784 | * data for that power state | |
1785 | */ | |
1786 | } | |
1787 | ||
1fa61106 | 1788 | static void sandybridge_update_wm(struct drm_device *dev) |
b445e3b0 ED |
1789 | { |
1790 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1791 | int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ | |
1792 | u32 val; | |
1793 | int fbc_wm, plane_wm, cursor_wm; | |
1794 | unsigned int enabled; | |
1795 | ||
1796 | enabled = 0; | |
1797 | if (g4x_compute_wm0(dev, 0, | |
1798 | &sandybridge_display_wm_info, latency, | |
1799 | &sandybridge_cursor_wm_info, latency, | |
1800 | &plane_wm, &cursor_wm)) { | |
1801 | val = I915_READ(WM0_PIPEA_ILK); | |
1802 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1803 | I915_WRITE(WM0_PIPEA_ILK, val | | |
1804 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1805 | DRM_DEBUG_KMS("FIFO watermarks For pipe A -" | |
1806 | " plane %d, " "cursor: %d\n", | |
1807 | plane_wm, cursor_wm); | |
1808 | enabled |= 1; | |
1809 | } | |
1810 | ||
1811 | if (g4x_compute_wm0(dev, 1, | |
1812 | &sandybridge_display_wm_info, latency, | |
1813 | &sandybridge_cursor_wm_info, latency, | |
1814 | &plane_wm, &cursor_wm)) { | |
1815 | val = I915_READ(WM0_PIPEB_ILK); | |
1816 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1817 | I915_WRITE(WM0_PIPEB_ILK, val | | |
1818 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1819 | DRM_DEBUG_KMS("FIFO watermarks For pipe B -" | |
1820 | " plane %d, cursor: %d\n", | |
1821 | plane_wm, cursor_wm); | |
1822 | enabled |= 2; | |
1823 | } | |
1824 | ||
c43d0188 CW |
1825 | /* |
1826 | * Calculate and update the self-refresh watermark only when one | |
1827 | * display plane is used. | |
1828 | * | |
1829 | * SNB support 3 levels of watermark. | |
1830 | * | |
1831 | * WM1/WM2/WM2 watermarks have to be enabled in the ascending order, | |
1832 | * and disabled in the descending order | |
1833 | * | |
1834 | */ | |
1835 | I915_WRITE(WM3_LP_ILK, 0); | |
1836 | I915_WRITE(WM2_LP_ILK, 0); | |
1837 | I915_WRITE(WM1_LP_ILK, 0); | |
1838 | ||
1839 | if (!single_plane_enabled(enabled) || | |
1840 | dev_priv->sprite_scaling_enabled) | |
1841 | return; | |
1842 | enabled = ffs(enabled) - 1; | |
1843 | ||
1844 | /* WM1 */ | |
1845 | if (!ironlake_compute_srwm(dev, 1, enabled, | |
1846 | SNB_READ_WM1_LATENCY() * 500, | |
1847 | &sandybridge_display_srwm_info, | |
1848 | &sandybridge_cursor_srwm_info, | |
1849 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1850 | return; | |
1851 | ||
1852 | I915_WRITE(WM1_LP_ILK, | |
1853 | WM1_LP_SR_EN | | |
1854 | (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1855 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1856 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1857 | cursor_wm); | |
1858 | ||
1859 | /* WM2 */ | |
1860 | if (!ironlake_compute_srwm(dev, 2, enabled, | |
1861 | SNB_READ_WM2_LATENCY() * 500, | |
1862 | &sandybridge_display_srwm_info, | |
1863 | &sandybridge_cursor_srwm_info, | |
1864 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1865 | return; | |
1866 | ||
1867 | I915_WRITE(WM2_LP_ILK, | |
1868 | WM2_LP_EN | | |
1869 | (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1870 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1871 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1872 | cursor_wm); | |
1873 | ||
1874 | /* WM3 */ | |
1875 | if (!ironlake_compute_srwm(dev, 3, enabled, | |
1876 | SNB_READ_WM3_LATENCY() * 500, | |
1877 | &sandybridge_display_srwm_info, | |
1878 | &sandybridge_cursor_srwm_info, | |
1879 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1880 | return; | |
1881 | ||
1882 | I915_WRITE(WM3_LP_ILK, | |
1883 | WM3_LP_EN | | |
1884 | (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1885 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1886 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1887 | cursor_wm); | |
1888 | } | |
1889 | ||
1890 | static void ivybridge_update_wm(struct drm_device *dev) | |
1891 | { | |
1892 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1893 | int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ | |
1894 | u32 val; | |
1895 | int fbc_wm, plane_wm, cursor_wm; | |
1896 | int ignore_fbc_wm, ignore_plane_wm, ignore_cursor_wm; | |
1897 | unsigned int enabled; | |
1898 | ||
1899 | enabled = 0; | |
1900 | if (g4x_compute_wm0(dev, 0, | |
1901 | &sandybridge_display_wm_info, latency, | |
1902 | &sandybridge_cursor_wm_info, latency, | |
1903 | &plane_wm, &cursor_wm)) { | |
1904 | val = I915_READ(WM0_PIPEA_ILK); | |
1905 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1906 | I915_WRITE(WM0_PIPEA_ILK, val | | |
1907 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1908 | DRM_DEBUG_KMS("FIFO watermarks For pipe A -" | |
1909 | " plane %d, " "cursor: %d\n", | |
1910 | plane_wm, cursor_wm); | |
1911 | enabled |= 1; | |
1912 | } | |
1913 | ||
1914 | if (g4x_compute_wm0(dev, 1, | |
1915 | &sandybridge_display_wm_info, latency, | |
1916 | &sandybridge_cursor_wm_info, latency, | |
1917 | &plane_wm, &cursor_wm)) { | |
1918 | val = I915_READ(WM0_PIPEB_ILK); | |
1919 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1920 | I915_WRITE(WM0_PIPEB_ILK, val | | |
1921 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1922 | DRM_DEBUG_KMS("FIFO watermarks For pipe B -" | |
1923 | " plane %d, cursor: %d\n", | |
1924 | plane_wm, cursor_wm); | |
1925 | enabled |= 2; | |
1926 | } | |
1927 | ||
1928 | if (g4x_compute_wm0(dev, 2, | |
b445e3b0 ED |
1929 | &sandybridge_display_wm_info, latency, |
1930 | &sandybridge_cursor_wm_info, latency, | |
1931 | &plane_wm, &cursor_wm)) { | |
1932 | val = I915_READ(WM0_PIPEC_IVB); | |
1933 | val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); | |
1934 | I915_WRITE(WM0_PIPEC_IVB, val | | |
1935 | ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); | |
1936 | DRM_DEBUG_KMS("FIFO watermarks For pipe C -" | |
1937 | " plane %d, cursor: %d\n", | |
1938 | plane_wm, cursor_wm); | |
1939 | enabled |= 3; | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | * Calculate and update the self-refresh watermark only when one | |
1944 | * display plane is used. | |
1945 | * | |
1946 | * SNB support 3 levels of watermark. | |
1947 | * | |
1948 | * WM1/WM2/WM2 watermarks have to be enabled in the ascending order, | |
1949 | * and disabled in the descending order | |
1950 | * | |
1951 | */ | |
1952 | I915_WRITE(WM3_LP_ILK, 0); | |
1953 | I915_WRITE(WM2_LP_ILK, 0); | |
1954 | I915_WRITE(WM1_LP_ILK, 0); | |
1955 | ||
1956 | if (!single_plane_enabled(enabled) || | |
1957 | dev_priv->sprite_scaling_enabled) | |
1958 | return; | |
1959 | enabled = ffs(enabled) - 1; | |
1960 | ||
1961 | /* WM1 */ | |
1962 | if (!ironlake_compute_srwm(dev, 1, enabled, | |
1963 | SNB_READ_WM1_LATENCY() * 500, | |
1964 | &sandybridge_display_srwm_info, | |
1965 | &sandybridge_cursor_srwm_info, | |
1966 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1967 | return; | |
1968 | ||
1969 | I915_WRITE(WM1_LP_ILK, | |
1970 | WM1_LP_SR_EN | | |
1971 | (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1972 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1973 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1974 | cursor_wm); | |
1975 | ||
1976 | /* WM2 */ | |
1977 | if (!ironlake_compute_srwm(dev, 2, enabled, | |
1978 | SNB_READ_WM2_LATENCY() * 500, | |
1979 | &sandybridge_display_srwm_info, | |
1980 | &sandybridge_cursor_srwm_info, | |
1981 | &fbc_wm, &plane_wm, &cursor_wm)) | |
1982 | return; | |
1983 | ||
1984 | I915_WRITE(WM2_LP_ILK, | |
1985 | WM2_LP_EN | | |
1986 | (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
1987 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
1988 | (plane_wm << WM1_LP_SR_SHIFT) | | |
1989 | cursor_wm); | |
1990 | ||
c43d0188 | 1991 | /* WM3, note we have to correct the cursor latency */ |
b445e3b0 ED |
1992 | if (!ironlake_compute_srwm(dev, 3, enabled, |
1993 | SNB_READ_WM3_LATENCY() * 500, | |
1994 | &sandybridge_display_srwm_info, | |
1995 | &sandybridge_cursor_srwm_info, | |
c43d0188 CW |
1996 | &fbc_wm, &plane_wm, &ignore_cursor_wm) || |
1997 | !ironlake_compute_srwm(dev, 3, enabled, | |
1998 | 2 * SNB_READ_WM3_LATENCY() * 500, | |
1999 | &sandybridge_display_srwm_info, | |
2000 | &sandybridge_cursor_srwm_info, | |
2001 | &ignore_fbc_wm, &ignore_plane_wm, &cursor_wm)) | |
b445e3b0 ED |
2002 | return; |
2003 | ||
2004 | I915_WRITE(WM3_LP_ILK, | |
2005 | WM3_LP_EN | | |
2006 | (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) | | |
2007 | (fbc_wm << WM1_LP_FBC_SHIFT) | | |
2008 | (plane_wm << WM1_LP_SR_SHIFT) | | |
2009 | cursor_wm); | |
2010 | } | |
2011 | ||
1f8eeabf ED |
2012 | static void |
2013 | haswell_update_linetime_wm(struct drm_device *dev, int pipe, | |
2014 | struct drm_display_mode *mode) | |
2015 | { | |
2016 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2017 | u32 temp; | |
2018 | ||
2019 | temp = I915_READ(PIPE_WM_LINETIME(pipe)); | |
2020 | temp &= ~PIPE_WM_LINETIME_MASK; | |
2021 | ||
2022 | /* The WM are computed with base on how long it takes to fill a single | |
2023 | * row at the given clock rate, multiplied by 8. | |
2024 | * */ | |
2025 | temp |= PIPE_WM_LINETIME_TIME( | |
2026 | ((mode->crtc_hdisplay * 1000) / mode->clock) * 8); | |
2027 | ||
2028 | /* IPS watermarks are only used by pipe A, and are ignored by | |
2029 | * pipes B and C. They are calculated similarly to the common | |
2030 | * linetime values, except that we are using CD clock frequency | |
2031 | * in MHz instead of pixel rate for the division. | |
2032 | * | |
2033 | * This is a placeholder for the IPS watermark calculation code. | |
2034 | */ | |
2035 | ||
2036 | I915_WRITE(PIPE_WM_LINETIME(pipe), temp); | |
2037 | } | |
2038 | ||
b445e3b0 ED |
2039 | static bool |
2040 | sandybridge_compute_sprite_wm(struct drm_device *dev, int plane, | |
2041 | uint32_t sprite_width, int pixel_size, | |
2042 | const struct intel_watermark_params *display, | |
2043 | int display_latency_ns, int *sprite_wm) | |
2044 | { | |
2045 | struct drm_crtc *crtc; | |
2046 | int clock; | |
2047 | int entries, tlb_miss; | |
2048 | ||
2049 | crtc = intel_get_crtc_for_plane(dev, plane); | |
f20e0b08 | 2050 | if (crtc->fb == NULL || !to_intel_crtc(crtc)->active) { |
b445e3b0 ED |
2051 | *sprite_wm = display->guard_size; |
2052 | return false; | |
2053 | } | |
2054 | ||
2055 | clock = crtc->mode.clock; | |
2056 | ||
2057 | /* Use the small buffer method to calculate the sprite watermark */ | |
2058 | entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; | |
2059 | tlb_miss = display->fifo_size*display->cacheline_size - | |
2060 | sprite_width * 8; | |
2061 | if (tlb_miss > 0) | |
2062 | entries += tlb_miss; | |
2063 | entries = DIV_ROUND_UP(entries, display->cacheline_size); | |
2064 | *sprite_wm = entries + display->guard_size; | |
2065 | if (*sprite_wm > (int)display->max_wm) | |
2066 | *sprite_wm = display->max_wm; | |
2067 | ||
2068 | return true; | |
2069 | } | |
2070 | ||
2071 | static bool | |
2072 | sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane, | |
2073 | uint32_t sprite_width, int pixel_size, | |
2074 | const struct intel_watermark_params *display, | |
2075 | int latency_ns, int *sprite_wm) | |
2076 | { | |
2077 | struct drm_crtc *crtc; | |
2078 | unsigned long line_time_us; | |
2079 | int clock; | |
2080 | int line_count, line_size; | |
2081 | int small, large; | |
2082 | int entries; | |
2083 | ||
2084 | if (!latency_ns) { | |
2085 | *sprite_wm = 0; | |
2086 | return false; | |
2087 | } | |
2088 | ||
2089 | crtc = intel_get_crtc_for_plane(dev, plane); | |
2090 | clock = crtc->mode.clock; | |
2091 | if (!clock) { | |
2092 | *sprite_wm = 0; | |
2093 | return false; | |
2094 | } | |
2095 | ||
2096 | line_time_us = (sprite_width * 1000) / clock; | |
2097 | if (!line_time_us) { | |
2098 | *sprite_wm = 0; | |
2099 | return false; | |
2100 | } | |
2101 | ||
2102 | line_count = (latency_ns / line_time_us + 1000) / 1000; | |
2103 | line_size = sprite_width * pixel_size; | |
2104 | ||
2105 | /* Use the minimum of the small and large buffer method for primary */ | |
2106 | small = ((clock * pixel_size / 1000) * latency_ns) / 1000; | |
2107 | large = line_count * line_size; | |
2108 | ||
2109 | entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); | |
2110 | *sprite_wm = entries + display->guard_size; | |
2111 | ||
2112 | return *sprite_wm > 0x3ff ? false : true; | |
2113 | } | |
2114 | ||
1fa61106 | 2115 | static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe, |
b445e3b0 ED |
2116 | uint32_t sprite_width, int pixel_size) |
2117 | { | |
2118 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2119 | int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ | |
2120 | u32 val; | |
2121 | int sprite_wm, reg; | |
2122 | int ret; | |
2123 | ||
2124 | switch (pipe) { | |
2125 | case 0: | |
2126 | reg = WM0_PIPEA_ILK; | |
2127 | break; | |
2128 | case 1: | |
2129 | reg = WM0_PIPEB_ILK; | |
2130 | break; | |
2131 | case 2: | |
2132 | reg = WM0_PIPEC_IVB; | |
2133 | break; | |
2134 | default: | |
2135 | return; /* bad pipe */ | |
2136 | } | |
2137 | ||
2138 | ret = sandybridge_compute_sprite_wm(dev, pipe, sprite_width, pixel_size, | |
2139 | &sandybridge_display_wm_info, | |
2140 | latency, &sprite_wm); | |
2141 | if (!ret) { | |
2142 | DRM_DEBUG_KMS("failed to compute sprite wm for pipe %d\n", | |
2143 | pipe); | |
2144 | return; | |
2145 | } | |
2146 | ||
2147 | val = I915_READ(reg); | |
2148 | val &= ~WM0_PIPE_SPRITE_MASK; | |
2149 | I915_WRITE(reg, val | (sprite_wm << WM0_PIPE_SPRITE_SHIFT)); | |
2150 | DRM_DEBUG_KMS("sprite watermarks For pipe %d - %d\n", pipe, sprite_wm); | |
2151 | ||
2152 | ||
2153 | ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, | |
2154 | pixel_size, | |
2155 | &sandybridge_display_srwm_info, | |
2156 | SNB_READ_WM1_LATENCY() * 500, | |
2157 | &sprite_wm); | |
2158 | if (!ret) { | |
2159 | DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %d\n", | |
2160 | pipe); | |
2161 | return; | |
2162 | } | |
2163 | I915_WRITE(WM1S_LP_ILK, sprite_wm); | |
2164 | ||
2165 | /* Only IVB has two more LP watermarks for sprite */ | |
2166 | if (!IS_IVYBRIDGE(dev)) | |
2167 | return; | |
2168 | ||
2169 | ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, | |
2170 | pixel_size, | |
2171 | &sandybridge_display_srwm_info, | |
2172 | SNB_READ_WM2_LATENCY() * 500, | |
2173 | &sprite_wm); | |
2174 | if (!ret) { | |
2175 | DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %d\n", | |
2176 | pipe); | |
2177 | return; | |
2178 | } | |
2179 | I915_WRITE(WM2S_LP_IVB, sprite_wm); | |
2180 | ||
2181 | ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, | |
2182 | pixel_size, | |
2183 | &sandybridge_display_srwm_info, | |
2184 | SNB_READ_WM3_LATENCY() * 500, | |
2185 | &sprite_wm); | |
2186 | if (!ret) { | |
2187 | DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %d\n", | |
2188 | pipe); | |
2189 | return; | |
2190 | } | |
2191 | I915_WRITE(WM3S_LP_IVB, sprite_wm); | |
2192 | } | |
2193 | ||
2194 | /** | |
2195 | * intel_update_watermarks - update FIFO watermark values based on current modes | |
2196 | * | |
2197 | * Calculate watermark values for the various WM regs based on current mode | |
2198 | * and plane configuration. | |
2199 | * | |
2200 | * There are several cases to deal with here: | |
2201 | * - normal (i.e. non-self-refresh) | |
2202 | * - self-refresh (SR) mode | |
2203 | * - lines are large relative to FIFO size (buffer can hold up to 2) | |
2204 | * - lines are small relative to FIFO size (buffer can hold more than 2 | |
2205 | * lines), so need to account for TLB latency | |
2206 | * | |
2207 | * The normal calculation is: | |
2208 | * watermark = dotclock * bytes per pixel * latency | |
2209 | * where latency is platform & configuration dependent (we assume pessimal | |
2210 | * values here). | |
2211 | * | |
2212 | * The SR calculation is: | |
2213 | * watermark = (trunc(latency/line time)+1) * surface width * | |
2214 | * bytes per pixel | |
2215 | * where | |
2216 | * line time = htotal / dotclock | |
2217 | * surface width = hdisplay for normal plane and 64 for cursor | |
2218 | * and latency is assumed to be high, as above. | |
2219 | * | |
2220 | * The final value programmed to the register should always be rounded up, | |
2221 | * and include an extra 2 entries to account for clock crossings. | |
2222 | * | |
2223 | * We don't use the sprite, so we can ignore that. And on Crestline we have | |
2224 | * to set the non-SR watermarks to 8. | |
2225 | */ | |
2226 | void intel_update_watermarks(struct drm_device *dev) | |
2227 | { | |
2228 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2229 | ||
2230 | if (dev_priv->display.update_wm) | |
2231 | dev_priv->display.update_wm(dev); | |
2232 | } | |
2233 | ||
1f8eeabf ED |
2234 | void intel_update_linetime_watermarks(struct drm_device *dev, |
2235 | int pipe, struct drm_display_mode *mode) | |
2236 | { | |
2237 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2238 | ||
2239 | if (dev_priv->display.update_linetime_wm) | |
2240 | dev_priv->display.update_linetime_wm(dev, pipe, mode); | |
2241 | } | |
2242 | ||
b445e3b0 ED |
2243 | void intel_update_sprite_watermarks(struct drm_device *dev, int pipe, |
2244 | uint32_t sprite_width, int pixel_size) | |
2245 | { | |
2246 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2247 | ||
2248 | if (dev_priv->display.update_sprite_wm) | |
2249 | dev_priv->display.update_sprite_wm(dev, pipe, sprite_width, | |
2250 | pixel_size); | |
2251 | } | |
2252 | ||
2b4e57bd ED |
2253 | static struct drm_i915_gem_object * |
2254 | intel_alloc_context_page(struct drm_device *dev) | |
2255 | { | |
2256 | struct drm_i915_gem_object *ctx; | |
2257 | int ret; | |
2258 | ||
2259 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
2260 | ||
2261 | ctx = i915_gem_alloc_object(dev, 4096); | |
2262 | if (!ctx) { | |
2263 | DRM_DEBUG("failed to alloc power context, RC6 disabled\n"); | |
2264 | return NULL; | |
2265 | } | |
2266 | ||
86a1ee26 | 2267 | ret = i915_gem_object_pin(ctx, 4096, true, false); |
2b4e57bd ED |
2268 | if (ret) { |
2269 | DRM_ERROR("failed to pin power context: %d\n", ret); | |
2270 | goto err_unref; | |
2271 | } | |
2272 | ||
2273 | ret = i915_gem_object_set_to_gtt_domain(ctx, 1); | |
2274 | if (ret) { | |
2275 | DRM_ERROR("failed to set-domain on power context: %d\n", ret); | |
2276 | goto err_unpin; | |
2277 | } | |
2278 | ||
2279 | return ctx; | |
2280 | ||
2281 | err_unpin: | |
2282 | i915_gem_object_unpin(ctx); | |
2283 | err_unref: | |
2284 | drm_gem_object_unreference(&ctx->base); | |
2285 | mutex_unlock(&dev->struct_mutex); | |
2286 | return NULL; | |
2287 | } | |
2288 | ||
9270388e DV |
2289 | /** |
2290 | * Lock protecting IPS related data structures | |
9270388e DV |
2291 | */ |
2292 | DEFINE_SPINLOCK(mchdev_lock); | |
2293 | ||
2294 | /* Global for IPS driver to get at the current i915 device. Protected by | |
2295 | * mchdev_lock. */ | |
2296 | static struct drm_i915_private *i915_mch_dev; | |
2297 | ||
2b4e57bd ED |
2298 | bool ironlake_set_drps(struct drm_device *dev, u8 val) |
2299 | { | |
2300 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2301 | u16 rgvswctl; | |
2302 | ||
9270388e DV |
2303 | assert_spin_locked(&mchdev_lock); |
2304 | ||
2b4e57bd ED |
2305 | rgvswctl = I915_READ16(MEMSWCTL); |
2306 | if (rgvswctl & MEMCTL_CMD_STS) { | |
2307 | DRM_DEBUG("gpu busy, RCS change rejected\n"); | |
2308 | return false; /* still busy with another command */ | |
2309 | } | |
2310 | ||
2311 | rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) | | |
2312 | (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM; | |
2313 | I915_WRITE16(MEMSWCTL, rgvswctl); | |
2314 | POSTING_READ16(MEMSWCTL); | |
2315 | ||
2316 | rgvswctl |= MEMCTL_CMD_STS; | |
2317 | I915_WRITE16(MEMSWCTL, rgvswctl); | |
2318 | ||
2319 | return true; | |
2320 | } | |
2321 | ||
8090c6b9 | 2322 | static void ironlake_enable_drps(struct drm_device *dev) |
2b4e57bd ED |
2323 | { |
2324 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2325 | u32 rgvmodectl = I915_READ(MEMMODECTL); | |
2326 | u8 fmax, fmin, fstart, vstart; | |
2327 | ||
9270388e DV |
2328 | spin_lock_irq(&mchdev_lock); |
2329 | ||
2b4e57bd ED |
2330 | /* Enable temp reporting */ |
2331 | I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN); | |
2332 | I915_WRITE16(TSC1, I915_READ(TSC1) | TSE); | |
2333 | ||
2334 | /* 100ms RC evaluation intervals */ | |
2335 | I915_WRITE(RCUPEI, 100000); | |
2336 | I915_WRITE(RCDNEI, 100000); | |
2337 | ||
2338 | /* Set max/min thresholds to 90ms and 80ms respectively */ | |
2339 | I915_WRITE(RCBMAXAVG, 90000); | |
2340 | I915_WRITE(RCBMINAVG, 80000); | |
2341 | ||
2342 | I915_WRITE(MEMIHYST, 1); | |
2343 | ||
2344 | /* Set up min, max, and cur for interrupt handling */ | |
2345 | fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT; | |
2346 | fmin = (rgvmodectl & MEMMODE_FMIN_MASK); | |
2347 | fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >> | |
2348 | MEMMODE_FSTART_SHIFT; | |
2349 | ||
2350 | vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >> | |
2351 | PXVFREQ_PX_SHIFT; | |
2352 | ||
20e4d407 DV |
2353 | dev_priv->ips.fmax = fmax; /* IPS callback will increase this */ |
2354 | dev_priv->ips.fstart = fstart; | |
2b4e57bd | 2355 | |
20e4d407 DV |
2356 | dev_priv->ips.max_delay = fstart; |
2357 | dev_priv->ips.min_delay = fmin; | |
2358 | dev_priv->ips.cur_delay = fstart; | |
2b4e57bd ED |
2359 | |
2360 | DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n", | |
2361 | fmax, fmin, fstart); | |
2362 | ||
2363 | I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN); | |
2364 | ||
2365 | /* | |
2366 | * Interrupts will be enabled in ironlake_irq_postinstall | |
2367 | */ | |
2368 | ||
2369 | I915_WRITE(VIDSTART, vstart); | |
2370 | POSTING_READ(VIDSTART); | |
2371 | ||
2372 | rgvmodectl |= MEMMODE_SWMODE_EN; | |
2373 | I915_WRITE(MEMMODECTL, rgvmodectl); | |
2374 | ||
9270388e | 2375 | if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10)) |
2b4e57bd | 2376 | DRM_ERROR("stuck trying to change perf mode\n"); |
9270388e | 2377 | mdelay(1); |
2b4e57bd ED |
2378 | |
2379 | ironlake_set_drps(dev, fstart); | |
2380 | ||
20e4d407 | 2381 | dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) + |
2b4e57bd | 2382 | I915_READ(0x112e0); |
20e4d407 DV |
2383 | dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies); |
2384 | dev_priv->ips.last_count2 = I915_READ(0x112f4); | |
2385 | getrawmonotonic(&dev_priv->ips.last_time2); | |
9270388e DV |
2386 | |
2387 | spin_unlock_irq(&mchdev_lock); | |
2b4e57bd ED |
2388 | } |
2389 | ||
8090c6b9 | 2390 | static void ironlake_disable_drps(struct drm_device *dev) |
2b4e57bd ED |
2391 | { |
2392 | struct drm_i915_private *dev_priv = dev->dev_private; | |
9270388e DV |
2393 | u16 rgvswctl; |
2394 | ||
2395 | spin_lock_irq(&mchdev_lock); | |
2396 | ||
2397 | rgvswctl = I915_READ16(MEMSWCTL); | |
2b4e57bd ED |
2398 | |
2399 | /* Ack interrupts, disable EFC interrupt */ | |
2400 | I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN); | |
2401 | I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG); | |
2402 | I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT); | |
2403 | I915_WRITE(DEIIR, DE_PCU_EVENT); | |
2404 | I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT); | |
2405 | ||
2406 | /* Go back to the starting frequency */ | |
20e4d407 | 2407 | ironlake_set_drps(dev, dev_priv->ips.fstart); |
9270388e | 2408 | mdelay(1); |
2b4e57bd ED |
2409 | rgvswctl |= MEMCTL_CMD_STS; |
2410 | I915_WRITE(MEMSWCTL, rgvswctl); | |
9270388e | 2411 | mdelay(1); |
2b4e57bd | 2412 | |
9270388e | 2413 | spin_unlock_irq(&mchdev_lock); |
2b4e57bd ED |
2414 | } |
2415 | ||
acbe9475 DV |
2416 | /* There's a funny hw issue where the hw returns all 0 when reading from |
2417 | * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value | |
2418 | * ourselves, instead of doing a rmw cycle (which might result in us clearing | |
2419 | * all limits and the gpu stuck at whatever frequency it is at atm). | |
2420 | */ | |
65bccb5c | 2421 | static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 *val) |
2b4e57bd | 2422 | { |
7b9e0ae6 | 2423 | u32 limits; |
2b4e57bd | 2424 | |
7b9e0ae6 | 2425 | limits = 0; |
c6a828d3 DV |
2426 | |
2427 | if (*val >= dev_priv->rps.max_delay) | |
2428 | *val = dev_priv->rps.max_delay; | |
2429 | limits |= dev_priv->rps.max_delay << 24; | |
20b46e59 DV |
2430 | |
2431 | /* Only set the down limit when we've reached the lowest level to avoid | |
2432 | * getting more interrupts, otherwise leave this clear. This prevents a | |
2433 | * race in the hw when coming out of rc6: There's a tiny window where | |
2434 | * the hw runs at the minimal clock before selecting the desired | |
2435 | * frequency, if the down threshold expires in that window we will not | |
2436 | * receive a down interrupt. */ | |
c6a828d3 DV |
2437 | if (*val <= dev_priv->rps.min_delay) { |
2438 | *val = dev_priv->rps.min_delay; | |
2439 | limits |= dev_priv->rps.min_delay << 16; | |
20b46e59 DV |
2440 | } |
2441 | ||
2442 | return limits; | |
2443 | } | |
2444 | ||
2445 | void gen6_set_rps(struct drm_device *dev, u8 val) | |
2446 | { | |
2447 | struct drm_i915_private *dev_priv = dev->dev_private; | |
65bccb5c | 2448 | u32 limits = gen6_rps_limits(dev_priv, &val); |
7b9e0ae6 | 2449 | |
4fc688ce | 2450 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
79249636 BW |
2451 | WARN_ON(val > dev_priv->rps.max_delay); |
2452 | WARN_ON(val < dev_priv->rps.min_delay); | |
004777cb | 2453 | |
c6a828d3 | 2454 | if (val == dev_priv->rps.cur_delay) |
7b9e0ae6 CW |
2455 | return; |
2456 | ||
2457 | I915_WRITE(GEN6_RPNSWREQ, | |
2458 | GEN6_FREQUENCY(val) | | |
2459 | GEN6_OFFSET(0) | | |
2460 | GEN6_AGGRESSIVE_TURBO); | |
2461 | ||
2462 | /* Make sure we continue to get interrupts | |
2463 | * until we hit the minimum or maximum frequencies. | |
2464 | */ | |
2465 | I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, limits); | |
2466 | ||
d5570a72 BW |
2467 | POSTING_READ(GEN6_RPNSWREQ); |
2468 | ||
c6a828d3 | 2469 | dev_priv->rps.cur_delay = val; |
be2cde9a DV |
2470 | |
2471 | trace_intel_gpu_freq_change(val * 50); | |
2b4e57bd ED |
2472 | } |
2473 | ||
8090c6b9 | 2474 | static void gen6_disable_rps(struct drm_device *dev) |
2b4e57bd ED |
2475 | { |
2476 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2477 | ||
88509484 | 2478 | I915_WRITE(GEN6_RC_CONTROL, 0); |
2b4e57bd ED |
2479 | I915_WRITE(GEN6_RPNSWREQ, 1 << 31); |
2480 | I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); | |
2481 | I915_WRITE(GEN6_PMIER, 0); | |
2482 | /* Complete PM interrupt masking here doesn't race with the rps work | |
2483 | * item again unmasking PM interrupts because that is using a different | |
2484 | * register (PMIMR) to mask PM interrupts. The only risk is in leaving | |
2485 | * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ | |
2486 | ||
c6a828d3 DV |
2487 | spin_lock_irq(&dev_priv->rps.lock); |
2488 | dev_priv->rps.pm_iir = 0; | |
2489 | spin_unlock_irq(&dev_priv->rps.lock); | |
2b4e57bd ED |
2490 | |
2491 | I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR)); | |
2492 | } | |
2493 | ||
2494 | int intel_enable_rc6(const struct drm_device *dev) | |
2495 | { | |
456470eb | 2496 | /* Respect the kernel parameter if it is set */ |
2b4e57bd ED |
2497 | if (i915_enable_rc6 >= 0) |
2498 | return i915_enable_rc6; | |
2499 | ||
6567d748 CW |
2500 | /* Disable RC6 on Ironlake */ |
2501 | if (INTEL_INFO(dev)->gen == 5) | |
2502 | return 0; | |
2b4e57bd | 2503 | |
456470eb DV |
2504 | if (IS_HASWELL(dev)) { |
2505 | DRM_DEBUG_DRIVER("Haswell: only RC6 available\n"); | |
4a637c2c | 2506 | return INTEL_RC6_ENABLE; |
456470eb | 2507 | } |
2b4e57bd | 2508 | |
456470eb | 2509 | /* snb/ivb have more than one rc6 state. */ |
2b4e57bd ED |
2510 | if (INTEL_INFO(dev)->gen == 6) { |
2511 | DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n"); | |
2512 | return INTEL_RC6_ENABLE; | |
2513 | } | |
456470eb | 2514 | |
2b4e57bd ED |
2515 | DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n"); |
2516 | return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE); | |
2517 | } | |
2518 | ||
79f5b2c7 | 2519 | static void gen6_enable_rps(struct drm_device *dev) |
2b4e57bd | 2520 | { |
79f5b2c7 | 2521 | struct drm_i915_private *dev_priv = dev->dev_private; |
b4519513 | 2522 | struct intel_ring_buffer *ring; |
7b9e0ae6 CW |
2523 | u32 rp_state_cap; |
2524 | u32 gt_perf_status; | |
31643d54 | 2525 | u32 rc6vids, pcu_mbox, rc6_mask = 0; |
2b4e57bd | 2526 | u32 gtfifodbg; |
2b4e57bd | 2527 | int rc6_mode; |
42c0526c | 2528 | int i, ret; |
2b4e57bd | 2529 | |
4fc688ce | 2530 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
79f5b2c7 | 2531 | |
2b4e57bd ED |
2532 | /* Here begins a magic sequence of register writes to enable |
2533 | * auto-downclocking. | |
2534 | * | |
2535 | * Perhaps there might be some value in exposing these to | |
2536 | * userspace... | |
2537 | */ | |
2538 | I915_WRITE(GEN6_RC_STATE, 0); | |
2b4e57bd ED |
2539 | |
2540 | /* Clear the DBG now so we don't confuse earlier errors */ | |
2541 | if ((gtfifodbg = I915_READ(GTFIFODBG))) { | |
2542 | DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg); | |
2543 | I915_WRITE(GTFIFODBG, gtfifodbg); | |
2544 | } | |
2545 | ||
2546 | gen6_gt_force_wake_get(dev_priv); | |
2547 | ||
7b9e0ae6 CW |
2548 | rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); |
2549 | gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS); | |
2550 | ||
2551 | /* In units of 100MHz */ | |
c6a828d3 DV |
2552 | dev_priv->rps.max_delay = rp_state_cap & 0xff; |
2553 | dev_priv->rps.min_delay = (rp_state_cap & 0xff0000) >> 16; | |
2554 | dev_priv->rps.cur_delay = 0; | |
7b9e0ae6 | 2555 | |
2b4e57bd ED |
2556 | /* disable the counters and set deterministic thresholds */ |
2557 | I915_WRITE(GEN6_RC_CONTROL, 0); | |
2558 | ||
2559 | I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16); | |
2560 | I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30); | |
2561 | I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30); | |
2562 | I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); | |
2563 | I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); | |
2564 | ||
b4519513 CW |
2565 | for_each_ring(ring, dev_priv, i) |
2566 | I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); | |
2b4e57bd ED |
2567 | |
2568 | I915_WRITE(GEN6_RC_SLEEP, 0); | |
2569 | I915_WRITE(GEN6_RC1e_THRESHOLD, 1000); | |
2570 | I915_WRITE(GEN6_RC6_THRESHOLD, 50000); | |
2571 | I915_WRITE(GEN6_RC6p_THRESHOLD, 100000); | |
2572 | I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */ | |
2573 | ||
5a7dc92a | 2574 | /* Check if we are enabling RC6 */ |
2b4e57bd ED |
2575 | rc6_mode = intel_enable_rc6(dev_priv->dev); |
2576 | if (rc6_mode & INTEL_RC6_ENABLE) | |
2577 | rc6_mask |= GEN6_RC_CTL_RC6_ENABLE; | |
2578 | ||
5a7dc92a ED |
2579 | /* We don't use those on Haswell */ |
2580 | if (!IS_HASWELL(dev)) { | |
2581 | if (rc6_mode & INTEL_RC6p_ENABLE) | |
2582 | rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE; | |
2b4e57bd | 2583 | |
5a7dc92a ED |
2584 | if (rc6_mode & INTEL_RC6pp_ENABLE) |
2585 | rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE; | |
2586 | } | |
2b4e57bd ED |
2587 | |
2588 | DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n", | |
5a7dc92a ED |
2589 | (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off", |
2590 | (rc6_mask & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off", | |
2591 | (rc6_mask & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off"); | |
2b4e57bd ED |
2592 | |
2593 | I915_WRITE(GEN6_RC_CONTROL, | |
2594 | rc6_mask | | |
2595 | GEN6_RC_CTL_EI_MODE(1) | | |
2596 | GEN6_RC_CTL_HW_ENABLE); | |
2597 | ||
2598 | I915_WRITE(GEN6_RPNSWREQ, | |
2599 | GEN6_FREQUENCY(10) | | |
2600 | GEN6_OFFSET(0) | | |
2601 | GEN6_AGGRESSIVE_TURBO); | |
2602 | I915_WRITE(GEN6_RC_VIDEO_FREQ, | |
2603 | GEN6_FREQUENCY(12)); | |
2604 | ||
2605 | I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000); | |
2606 | I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, | |
c6a828d3 DV |
2607 | dev_priv->rps.max_delay << 24 | |
2608 | dev_priv->rps.min_delay << 16); | |
5a7dc92a | 2609 | |
1ee9ae32 DV |
2610 | I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400); |
2611 | I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000); | |
2612 | I915_WRITE(GEN6_RP_UP_EI, 66000); | |
2613 | I915_WRITE(GEN6_RP_DOWN_EI, 350000); | |
5a7dc92a | 2614 | |
2b4e57bd ED |
2615 | I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); |
2616 | I915_WRITE(GEN6_RP_CONTROL, | |
2617 | GEN6_RP_MEDIA_TURBO | | |
89ba829e | 2618 | GEN6_RP_MEDIA_HW_NORMAL_MODE | |
2b4e57bd ED |
2619 | GEN6_RP_MEDIA_IS_GFX | |
2620 | GEN6_RP_ENABLE | | |
2621 | GEN6_RP_UP_BUSY_AVG | | |
5a7dc92a | 2622 | (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT)); |
2b4e57bd | 2623 | |
42c0526c BW |
2624 | ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0); |
2625 | if (!ret) { | |
2626 | pcu_mbox = 0; | |
2627 | ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox); | |
2628 | if (ret && pcu_mbox & (1<<31)) { /* OC supported */ | |
2629 | dev_priv->rps.max_delay = pcu_mbox & 0xff; | |
2630 | DRM_DEBUG_DRIVER("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox * 50); | |
2631 | } | |
2632 | } else { | |
2633 | DRM_DEBUG_DRIVER("Failed to set the min frequency\n"); | |
2b4e57bd ED |
2634 | } |
2635 | ||
7b9e0ae6 | 2636 | gen6_set_rps(dev_priv->dev, (gt_perf_status & 0xff00) >> 8); |
2b4e57bd ED |
2637 | |
2638 | /* requires MSI enabled */ | |
ff928261 | 2639 | I915_WRITE(GEN6_PMIER, GEN6_PM_DEFERRED_EVENTS); |
c6a828d3 DV |
2640 | spin_lock_irq(&dev_priv->rps.lock); |
2641 | WARN_ON(dev_priv->rps.pm_iir != 0); | |
2b4e57bd | 2642 | I915_WRITE(GEN6_PMIMR, 0); |
c6a828d3 | 2643 | spin_unlock_irq(&dev_priv->rps.lock); |
2b4e57bd ED |
2644 | /* enable all PM interrupts */ |
2645 | I915_WRITE(GEN6_PMINTRMSK, 0); | |
2646 | ||
31643d54 BW |
2647 | rc6vids = 0; |
2648 | ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids); | |
2649 | if (IS_GEN6(dev) && ret) { | |
2650 | DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n"); | |
2651 | } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) { | |
2652 | DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n", | |
2653 | GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450); | |
2654 | rc6vids &= 0xffff00; | |
2655 | rc6vids |= GEN6_ENCODE_RC6_VID(450); | |
2656 | ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids); | |
2657 | if (ret) | |
2658 | DRM_ERROR("Couldn't fix incorrect rc6 voltage\n"); | |
2659 | } | |
2660 | ||
2b4e57bd | 2661 | gen6_gt_force_wake_put(dev_priv); |
2b4e57bd ED |
2662 | } |
2663 | ||
79f5b2c7 | 2664 | static void gen6_update_ring_freq(struct drm_device *dev) |
2b4e57bd | 2665 | { |
79f5b2c7 | 2666 | struct drm_i915_private *dev_priv = dev->dev_private; |
2b4e57bd | 2667 | int min_freq = 15; |
e3fef09d JD |
2668 | int gpu_freq; |
2669 | unsigned int ia_freq, max_ia_freq; | |
2b4e57bd ED |
2670 | int scaling_factor = 180; |
2671 | ||
4fc688ce | 2672 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
79f5b2c7 | 2673 | |
2b4e57bd ED |
2674 | max_ia_freq = cpufreq_quick_get_max(0); |
2675 | /* | |
2676 | * Default to measured freq if none found, PCU will ensure we don't go | |
2677 | * over | |
2678 | */ | |
2679 | if (!max_ia_freq) | |
2680 | max_ia_freq = tsc_khz; | |
2681 | ||
2682 | /* Convert from kHz to MHz */ | |
2683 | max_ia_freq /= 1000; | |
2684 | ||
2b4e57bd ED |
2685 | /* |
2686 | * For each potential GPU frequency, load a ring frequency we'd like | |
2687 | * to use for memory access. We do this by specifying the IA frequency | |
2688 | * the PCU should use as a reference to determine the ring frequency. | |
2689 | */ | |
c6a828d3 | 2690 | for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay; |
2b4e57bd | 2691 | gpu_freq--) { |
c6a828d3 | 2692 | int diff = dev_priv->rps.max_delay - gpu_freq; |
2b4e57bd ED |
2693 | |
2694 | /* | |
2695 | * For GPU frequencies less than 750MHz, just use the lowest | |
2696 | * ring freq. | |
2697 | */ | |
2698 | if (gpu_freq < min_freq) | |
2699 | ia_freq = 800; | |
2700 | else | |
2701 | ia_freq = max_ia_freq - ((diff * scaling_factor) / 2); | |
2702 | ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100); | |
42c0526c | 2703 | ia_freq <<= GEN6_PCODE_FREQ_IA_RATIO_SHIFT; |
2b4e57bd | 2704 | |
42c0526c BW |
2705 | sandybridge_pcode_write(dev_priv, |
2706 | GEN6_PCODE_WRITE_MIN_FREQ_TABLE, | |
2707 | ia_freq | gpu_freq); | |
2b4e57bd | 2708 | } |
2b4e57bd ED |
2709 | } |
2710 | ||
930ebb46 | 2711 | void ironlake_teardown_rc6(struct drm_device *dev) |
2b4e57bd ED |
2712 | { |
2713 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2714 | ||
3e373948 DV |
2715 | if (dev_priv->ips.renderctx) { |
2716 | i915_gem_object_unpin(dev_priv->ips.renderctx); | |
2717 | drm_gem_object_unreference(&dev_priv->ips.renderctx->base); | |
2718 | dev_priv->ips.renderctx = NULL; | |
2b4e57bd ED |
2719 | } |
2720 | ||
3e373948 DV |
2721 | if (dev_priv->ips.pwrctx) { |
2722 | i915_gem_object_unpin(dev_priv->ips.pwrctx); | |
2723 | drm_gem_object_unreference(&dev_priv->ips.pwrctx->base); | |
2724 | dev_priv->ips.pwrctx = NULL; | |
2b4e57bd ED |
2725 | } |
2726 | } | |
2727 | ||
930ebb46 | 2728 | static void ironlake_disable_rc6(struct drm_device *dev) |
2b4e57bd ED |
2729 | { |
2730 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2731 | ||
2732 | if (I915_READ(PWRCTXA)) { | |
2733 | /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */ | |
2734 | I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT); | |
2735 | wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON), | |
2736 | 50); | |
2737 | ||
2738 | I915_WRITE(PWRCTXA, 0); | |
2739 | POSTING_READ(PWRCTXA); | |
2740 | ||
2741 | I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); | |
2742 | POSTING_READ(RSTDBYCTL); | |
2743 | } | |
2b4e57bd ED |
2744 | } |
2745 | ||
2746 | static int ironlake_setup_rc6(struct drm_device *dev) | |
2747 | { | |
2748 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2749 | ||
3e373948 DV |
2750 | if (dev_priv->ips.renderctx == NULL) |
2751 | dev_priv->ips.renderctx = intel_alloc_context_page(dev); | |
2752 | if (!dev_priv->ips.renderctx) | |
2b4e57bd ED |
2753 | return -ENOMEM; |
2754 | ||
3e373948 DV |
2755 | if (dev_priv->ips.pwrctx == NULL) |
2756 | dev_priv->ips.pwrctx = intel_alloc_context_page(dev); | |
2757 | if (!dev_priv->ips.pwrctx) { | |
2b4e57bd ED |
2758 | ironlake_teardown_rc6(dev); |
2759 | return -ENOMEM; | |
2760 | } | |
2761 | ||
2762 | return 0; | |
2763 | } | |
2764 | ||
930ebb46 | 2765 | static void ironlake_enable_rc6(struct drm_device *dev) |
2b4e57bd ED |
2766 | { |
2767 | struct drm_i915_private *dev_priv = dev->dev_private; | |
6d90c952 | 2768 | struct intel_ring_buffer *ring = &dev_priv->ring[RCS]; |
3e960501 | 2769 | bool was_interruptible; |
2b4e57bd ED |
2770 | int ret; |
2771 | ||
2772 | /* rc6 disabled by default due to repeated reports of hanging during | |
2773 | * boot and resume. | |
2774 | */ | |
2775 | if (!intel_enable_rc6(dev)) | |
2776 | return; | |
2777 | ||
79f5b2c7 DV |
2778 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
2779 | ||
2b4e57bd | 2780 | ret = ironlake_setup_rc6(dev); |
79f5b2c7 | 2781 | if (ret) |
2b4e57bd | 2782 | return; |
2b4e57bd | 2783 | |
3e960501 CW |
2784 | was_interruptible = dev_priv->mm.interruptible; |
2785 | dev_priv->mm.interruptible = false; | |
2786 | ||
2b4e57bd ED |
2787 | /* |
2788 | * GPU can automatically power down the render unit if given a page | |
2789 | * to save state. | |
2790 | */ | |
6d90c952 | 2791 | ret = intel_ring_begin(ring, 6); |
2b4e57bd ED |
2792 | if (ret) { |
2793 | ironlake_teardown_rc6(dev); | |
3e960501 | 2794 | dev_priv->mm.interruptible = was_interruptible; |
2b4e57bd ED |
2795 | return; |
2796 | } | |
2797 | ||
6d90c952 DV |
2798 | intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN); |
2799 | intel_ring_emit(ring, MI_SET_CONTEXT); | |
3e373948 | 2800 | intel_ring_emit(ring, dev_priv->ips.renderctx->gtt_offset | |
6d90c952 DV |
2801 | MI_MM_SPACE_GTT | |
2802 | MI_SAVE_EXT_STATE_EN | | |
2803 | MI_RESTORE_EXT_STATE_EN | | |
2804 | MI_RESTORE_INHIBIT); | |
2805 | intel_ring_emit(ring, MI_SUSPEND_FLUSH); | |
2806 | intel_ring_emit(ring, MI_NOOP); | |
2807 | intel_ring_emit(ring, MI_FLUSH); | |
2808 | intel_ring_advance(ring); | |
2b4e57bd ED |
2809 | |
2810 | /* | |
2811 | * Wait for the command parser to advance past MI_SET_CONTEXT. The HW | |
2812 | * does an implicit flush, combined with MI_FLUSH above, it should be | |
2813 | * safe to assume that renderctx is valid | |
2814 | */ | |
3e960501 CW |
2815 | ret = intel_ring_idle(ring); |
2816 | dev_priv->mm.interruptible = was_interruptible; | |
2b4e57bd ED |
2817 | if (ret) { |
2818 | DRM_ERROR("failed to enable ironlake power power savings\n"); | |
2819 | ironlake_teardown_rc6(dev); | |
2b4e57bd ED |
2820 | return; |
2821 | } | |
2822 | ||
3e373948 | 2823 | I915_WRITE(PWRCTXA, dev_priv->ips.pwrctx->gtt_offset | PWRCTX_EN); |
2b4e57bd | 2824 | I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); |
2b4e57bd ED |
2825 | } |
2826 | ||
dde18883 ED |
2827 | static unsigned long intel_pxfreq(u32 vidfreq) |
2828 | { | |
2829 | unsigned long freq; | |
2830 | int div = (vidfreq & 0x3f0000) >> 16; | |
2831 | int post = (vidfreq & 0x3000) >> 12; | |
2832 | int pre = (vidfreq & 0x7); | |
2833 | ||
2834 | if (!pre) | |
2835 | return 0; | |
2836 | ||
2837 | freq = ((div * 133333) / ((1<<post) * pre)); | |
2838 | ||
2839 | return freq; | |
2840 | } | |
2841 | ||
eb48eb00 DV |
2842 | static const struct cparams { |
2843 | u16 i; | |
2844 | u16 t; | |
2845 | u16 m; | |
2846 | u16 c; | |
2847 | } cparams[] = { | |
2848 | { 1, 1333, 301, 28664 }, | |
2849 | { 1, 1066, 294, 24460 }, | |
2850 | { 1, 800, 294, 25192 }, | |
2851 | { 0, 1333, 276, 27605 }, | |
2852 | { 0, 1066, 276, 27605 }, | |
2853 | { 0, 800, 231, 23784 }, | |
2854 | }; | |
2855 | ||
f531dcb2 | 2856 | static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv) |
eb48eb00 DV |
2857 | { |
2858 | u64 total_count, diff, ret; | |
2859 | u32 count1, count2, count3, m = 0, c = 0; | |
2860 | unsigned long now = jiffies_to_msecs(jiffies), diff1; | |
2861 | int i; | |
2862 | ||
02d71956 DV |
2863 | assert_spin_locked(&mchdev_lock); |
2864 | ||
20e4d407 | 2865 | diff1 = now - dev_priv->ips.last_time1; |
eb48eb00 DV |
2866 | |
2867 | /* Prevent division-by-zero if we are asking too fast. | |
2868 | * Also, we don't get interesting results if we are polling | |
2869 | * faster than once in 10ms, so just return the saved value | |
2870 | * in such cases. | |
2871 | */ | |
2872 | if (diff1 <= 10) | |
20e4d407 | 2873 | return dev_priv->ips.chipset_power; |
eb48eb00 DV |
2874 | |
2875 | count1 = I915_READ(DMIEC); | |
2876 | count2 = I915_READ(DDREC); | |
2877 | count3 = I915_READ(CSIEC); | |
2878 | ||
2879 | total_count = count1 + count2 + count3; | |
2880 | ||
2881 | /* FIXME: handle per-counter overflow */ | |
20e4d407 DV |
2882 | if (total_count < dev_priv->ips.last_count1) { |
2883 | diff = ~0UL - dev_priv->ips.last_count1; | |
eb48eb00 DV |
2884 | diff += total_count; |
2885 | } else { | |
20e4d407 | 2886 | diff = total_count - dev_priv->ips.last_count1; |
eb48eb00 DV |
2887 | } |
2888 | ||
2889 | for (i = 0; i < ARRAY_SIZE(cparams); i++) { | |
20e4d407 DV |
2890 | if (cparams[i].i == dev_priv->ips.c_m && |
2891 | cparams[i].t == dev_priv->ips.r_t) { | |
eb48eb00 DV |
2892 | m = cparams[i].m; |
2893 | c = cparams[i].c; | |
2894 | break; | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | diff = div_u64(diff, diff1); | |
2899 | ret = ((m * diff) + c); | |
2900 | ret = div_u64(ret, 10); | |
2901 | ||
20e4d407 DV |
2902 | dev_priv->ips.last_count1 = total_count; |
2903 | dev_priv->ips.last_time1 = now; | |
eb48eb00 | 2904 | |
20e4d407 | 2905 | dev_priv->ips.chipset_power = ret; |
eb48eb00 DV |
2906 | |
2907 | return ret; | |
2908 | } | |
2909 | ||
f531dcb2 CW |
2910 | unsigned long i915_chipset_val(struct drm_i915_private *dev_priv) |
2911 | { | |
2912 | unsigned long val; | |
2913 | ||
2914 | if (dev_priv->info->gen != 5) | |
2915 | return 0; | |
2916 | ||
2917 | spin_lock_irq(&mchdev_lock); | |
2918 | ||
2919 | val = __i915_chipset_val(dev_priv); | |
2920 | ||
2921 | spin_unlock_irq(&mchdev_lock); | |
2922 | ||
2923 | return val; | |
2924 | } | |
2925 | ||
eb48eb00 DV |
2926 | unsigned long i915_mch_val(struct drm_i915_private *dev_priv) |
2927 | { | |
2928 | unsigned long m, x, b; | |
2929 | u32 tsfs; | |
2930 | ||
2931 | tsfs = I915_READ(TSFS); | |
2932 | ||
2933 | m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT); | |
2934 | x = I915_READ8(TR1); | |
2935 | ||
2936 | b = tsfs & TSFS_INTR_MASK; | |
2937 | ||
2938 | return ((m * x) / 127) - b; | |
2939 | } | |
2940 | ||
2941 | static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid) | |
2942 | { | |
2943 | static const struct v_table { | |
2944 | u16 vd; /* in .1 mil */ | |
2945 | u16 vm; /* in .1 mil */ | |
2946 | } v_table[] = { | |
2947 | { 0, 0, }, | |
2948 | { 375, 0, }, | |
2949 | { 500, 0, }, | |
2950 | { 625, 0, }, | |
2951 | { 750, 0, }, | |
2952 | { 875, 0, }, | |
2953 | { 1000, 0, }, | |
2954 | { 1125, 0, }, | |
2955 | { 4125, 3000, }, | |
2956 | { 4125, 3000, }, | |
2957 | { 4125, 3000, }, | |
2958 | { 4125, 3000, }, | |
2959 | { 4125, 3000, }, | |
2960 | { 4125, 3000, }, | |
2961 | { 4125, 3000, }, | |
2962 | { 4125, 3000, }, | |
2963 | { 4125, 3000, }, | |
2964 | { 4125, 3000, }, | |
2965 | { 4125, 3000, }, | |
2966 | { 4125, 3000, }, | |
2967 | { 4125, 3000, }, | |
2968 | { 4125, 3000, }, | |
2969 | { 4125, 3000, }, | |
2970 | { 4125, 3000, }, | |
2971 | { 4125, 3000, }, | |
2972 | { 4125, 3000, }, | |
2973 | { 4125, 3000, }, | |
2974 | { 4125, 3000, }, | |
2975 | { 4125, 3000, }, | |
2976 | { 4125, 3000, }, | |
2977 | { 4125, 3000, }, | |
2978 | { 4125, 3000, }, | |
2979 | { 4250, 3125, }, | |
2980 | { 4375, 3250, }, | |
2981 | { 4500, 3375, }, | |
2982 | { 4625, 3500, }, | |
2983 | { 4750, 3625, }, | |
2984 | { 4875, 3750, }, | |
2985 | { 5000, 3875, }, | |
2986 | { 5125, 4000, }, | |
2987 | { 5250, 4125, }, | |
2988 | { 5375, 4250, }, | |
2989 | { 5500, 4375, }, | |
2990 | { 5625, 4500, }, | |
2991 | { 5750, 4625, }, | |
2992 | { 5875, 4750, }, | |
2993 | { 6000, 4875, }, | |
2994 | { 6125, 5000, }, | |
2995 | { 6250, 5125, }, | |
2996 | { 6375, 5250, }, | |
2997 | { 6500, 5375, }, | |
2998 | { 6625, 5500, }, | |
2999 | { 6750, 5625, }, | |
3000 | { 6875, 5750, }, | |
3001 | { 7000, 5875, }, | |
3002 | { 7125, 6000, }, | |
3003 | { 7250, 6125, }, | |
3004 | { 7375, 6250, }, | |
3005 | { 7500, 6375, }, | |
3006 | { 7625, 6500, }, | |
3007 | { 7750, 6625, }, | |
3008 | { 7875, 6750, }, | |
3009 | { 8000, 6875, }, | |
3010 | { 8125, 7000, }, | |
3011 | { 8250, 7125, }, | |
3012 | { 8375, 7250, }, | |
3013 | { 8500, 7375, }, | |
3014 | { 8625, 7500, }, | |
3015 | { 8750, 7625, }, | |
3016 | { 8875, 7750, }, | |
3017 | { 9000, 7875, }, | |
3018 | { 9125, 8000, }, | |
3019 | { 9250, 8125, }, | |
3020 | { 9375, 8250, }, | |
3021 | { 9500, 8375, }, | |
3022 | { 9625, 8500, }, | |
3023 | { 9750, 8625, }, | |
3024 | { 9875, 8750, }, | |
3025 | { 10000, 8875, }, | |
3026 | { 10125, 9000, }, | |
3027 | { 10250, 9125, }, | |
3028 | { 10375, 9250, }, | |
3029 | { 10500, 9375, }, | |
3030 | { 10625, 9500, }, | |
3031 | { 10750, 9625, }, | |
3032 | { 10875, 9750, }, | |
3033 | { 11000, 9875, }, | |
3034 | { 11125, 10000, }, | |
3035 | { 11250, 10125, }, | |
3036 | { 11375, 10250, }, | |
3037 | { 11500, 10375, }, | |
3038 | { 11625, 10500, }, | |
3039 | { 11750, 10625, }, | |
3040 | { 11875, 10750, }, | |
3041 | { 12000, 10875, }, | |
3042 | { 12125, 11000, }, | |
3043 | { 12250, 11125, }, | |
3044 | { 12375, 11250, }, | |
3045 | { 12500, 11375, }, | |
3046 | { 12625, 11500, }, | |
3047 | { 12750, 11625, }, | |
3048 | { 12875, 11750, }, | |
3049 | { 13000, 11875, }, | |
3050 | { 13125, 12000, }, | |
3051 | { 13250, 12125, }, | |
3052 | { 13375, 12250, }, | |
3053 | { 13500, 12375, }, | |
3054 | { 13625, 12500, }, | |
3055 | { 13750, 12625, }, | |
3056 | { 13875, 12750, }, | |
3057 | { 14000, 12875, }, | |
3058 | { 14125, 13000, }, | |
3059 | { 14250, 13125, }, | |
3060 | { 14375, 13250, }, | |
3061 | { 14500, 13375, }, | |
3062 | { 14625, 13500, }, | |
3063 | { 14750, 13625, }, | |
3064 | { 14875, 13750, }, | |
3065 | { 15000, 13875, }, | |
3066 | { 15125, 14000, }, | |
3067 | { 15250, 14125, }, | |
3068 | { 15375, 14250, }, | |
3069 | { 15500, 14375, }, | |
3070 | { 15625, 14500, }, | |
3071 | { 15750, 14625, }, | |
3072 | { 15875, 14750, }, | |
3073 | { 16000, 14875, }, | |
3074 | { 16125, 15000, }, | |
3075 | }; | |
3076 | if (dev_priv->info->is_mobile) | |
3077 | return v_table[pxvid].vm; | |
3078 | else | |
3079 | return v_table[pxvid].vd; | |
3080 | } | |
3081 | ||
02d71956 | 3082 | static void __i915_update_gfx_val(struct drm_i915_private *dev_priv) |
eb48eb00 DV |
3083 | { |
3084 | struct timespec now, diff1; | |
3085 | u64 diff; | |
3086 | unsigned long diffms; | |
3087 | u32 count; | |
3088 | ||
02d71956 | 3089 | assert_spin_locked(&mchdev_lock); |
eb48eb00 DV |
3090 | |
3091 | getrawmonotonic(&now); | |
20e4d407 | 3092 | diff1 = timespec_sub(now, dev_priv->ips.last_time2); |
eb48eb00 DV |
3093 | |
3094 | /* Don't divide by 0 */ | |
3095 | diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000; | |
3096 | if (!diffms) | |
3097 | return; | |
3098 | ||
3099 | count = I915_READ(GFXEC); | |
3100 | ||
20e4d407 DV |
3101 | if (count < dev_priv->ips.last_count2) { |
3102 | diff = ~0UL - dev_priv->ips.last_count2; | |
eb48eb00 DV |
3103 | diff += count; |
3104 | } else { | |
20e4d407 | 3105 | diff = count - dev_priv->ips.last_count2; |
eb48eb00 DV |
3106 | } |
3107 | ||
20e4d407 DV |
3108 | dev_priv->ips.last_count2 = count; |
3109 | dev_priv->ips.last_time2 = now; | |
eb48eb00 DV |
3110 | |
3111 | /* More magic constants... */ | |
3112 | diff = diff * 1181; | |
3113 | diff = div_u64(diff, diffms * 10); | |
20e4d407 | 3114 | dev_priv->ips.gfx_power = diff; |
eb48eb00 DV |
3115 | } |
3116 | ||
02d71956 DV |
3117 | void i915_update_gfx_val(struct drm_i915_private *dev_priv) |
3118 | { | |
3119 | if (dev_priv->info->gen != 5) | |
3120 | return; | |
3121 | ||
9270388e | 3122 | spin_lock_irq(&mchdev_lock); |
02d71956 DV |
3123 | |
3124 | __i915_update_gfx_val(dev_priv); | |
3125 | ||
9270388e | 3126 | spin_unlock_irq(&mchdev_lock); |
02d71956 DV |
3127 | } |
3128 | ||
f531dcb2 | 3129 | static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv) |
eb48eb00 DV |
3130 | { |
3131 | unsigned long t, corr, state1, corr2, state2; | |
3132 | u32 pxvid, ext_v; | |
3133 | ||
02d71956 DV |
3134 | assert_spin_locked(&mchdev_lock); |
3135 | ||
c6a828d3 | 3136 | pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4)); |
eb48eb00 DV |
3137 | pxvid = (pxvid >> 24) & 0x7f; |
3138 | ext_v = pvid_to_extvid(dev_priv, pxvid); | |
3139 | ||
3140 | state1 = ext_v; | |
3141 | ||
3142 | t = i915_mch_val(dev_priv); | |
3143 | ||
3144 | /* Revel in the empirically derived constants */ | |
3145 | ||
3146 | /* Correction factor in 1/100000 units */ | |
3147 | if (t > 80) | |
3148 | corr = ((t * 2349) + 135940); | |
3149 | else if (t >= 50) | |
3150 | corr = ((t * 964) + 29317); | |
3151 | else /* < 50 */ | |
3152 | corr = ((t * 301) + 1004); | |
3153 | ||
3154 | corr = corr * ((150142 * state1) / 10000 - 78642); | |
3155 | corr /= 100000; | |
20e4d407 | 3156 | corr2 = (corr * dev_priv->ips.corr); |
eb48eb00 DV |
3157 | |
3158 | state2 = (corr2 * state1) / 10000; | |
3159 | state2 /= 100; /* convert to mW */ | |
3160 | ||
02d71956 | 3161 | __i915_update_gfx_val(dev_priv); |
eb48eb00 | 3162 | |
20e4d407 | 3163 | return dev_priv->ips.gfx_power + state2; |
eb48eb00 DV |
3164 | } |
3165 | ||
f531dcb2 CW |
3166 | unsigned long i915_gfx_val(struct drm_i915_private *dev_priv) |
3167 | { | |
3168 | unsigned long val; | |
3169 | ||
3170 | if (dev_priv->info->gen != 5) | |
3171 | return 0; | |
3172 | ||
3173 | spin_lock_irq(&mchdev_lock); | |
3174 | ||
3175 | val = __i915_gfx_val(dev_priv); | |
3176 | ||
3177 | spin_unlock_irq(&mchdev_lock); | |
3178 | ||
3179 | return val; | |
3180 | } | |
3181 | ||
eb48eb00 DV |
3182 | /** |
3183 | * i915_read_mch_val - return value for IPS use | |
3184 | * | |
3185 | * Calculate and return a value for the IPS driver to use when deciding whether | |
3186 | * we have thermal and power headroom to increase CPU or GPU power budget. | |
3187 | */ | |
3188 | unsigned long i915_read_mch_val(void) | |
3189 | { | |
3190 | struct drm_i915_private *dev_priv; | |
3191 | unsigned long chipset_val, graphics_val, ret = 0; | |
3192 | ||
9270388e | 3193 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
3194 | if (!i915_mch_dev) |
3195 | goto out_unlock; | |
3196 | dev_priv = i915_mch_dev; | |
3197 | ||
f531dcb2 CW |
3198 | chipset_val = __i915_chipset_val(dev_priv); |
3199 | graphics_val = __i915_gfx_val(dev_priv); | |
eb48eb00 DV |
3200 | |
3201 | ret = chipset_val + graphics_val; | |
3202 | ||
3203 | out_unlock: | |
9270388e | 3204 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
3205 | |
3206 | return ret; | |
3207 | } | |
3208 | EXPORT_SYMBOL_GPL(i915_read_mch_val); | |
3209 | ||
3210 | /** | |
3211 | * i915_gpu_raise - raise GPU frequency limit | |
3212 | * | |
3213 | * Raise the limit; IPS indicates we have thermal headroom. | |
3214 | */ | |
3215 | bool i915_gpu_raise(void) | |
3216 | { | |
3217 | struct drm_i915_private *dev_priv; | |
3218 | bool ret = true; | |
3219 | ||
9270388e | 3220 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
3221 | if (!i915_mch_dev) { |
3222 | ret = false; | |
3223 | goto out_unlock; | |
3224 | } | |
3225 | dev_priv = i915_mch_dev; | |
3226 | ||
20e4d407 DV |
3227 | if (dev_priv->ips.max_delay > dev_priv->ips.fmax) |
3228 | dev_priv->ips.max_delay--; | |
eb48eb00 DV |
3229 | |
3230 | out_unlock: | |
9270388e | 3231 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
3232 | |
3233 | return ret; | |
3234 | } | |
3235 | EXPORT_SYMBOL_GPL(i915_gpu_raise); | |
3236 | ||
3237 | /** | |
3238 | * i915_gpu_lower - lower GPU frequency limit | |
3239 | * | |
3240 | * IPS indicates we're close to a thermal limit, so throttle back the GPU | |
3241 | * frequency maximum. | |
3242 | */ | |
3243 | bool i915_gpu_lower(void) | |
3244 | { | |
3245 | struct drm_i915_private *dev_priv; | |
3246 | bool ret = true; | |
3247 | ||
9270388e | 3248 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
3249 | if (!i915_mch_dev) { |
3250 | ret = false; | |
3251 | goto out_unlock; | |
3252 | } | |
3253 | dev_priv = i915_mch_dev; | |
3254 | ||
20e4d407 DV |
3255 | if (dev_priv->ips.max_delay < dev_priv->ips.min_delay) |
3256 | dev_priv->ips.max_delay++; | |
eb48eb00 DV |
3257 | |
3258 | out_unlock: | |
9270388e | 3259 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
3260 | |
3261 | return ret; | |
3262 | } | |
3263 | EXPORT_SYMBOL_GPL(i915_gpu_lower); | |
3264 | ||
3265 | /** | |
3266 | * i915_gpu_busy - indicate GPU business to IPS | |
3267 | * | |
3268 | * Tell the IPS driver whether or not the GPU is busy. | |
3269 | */ | |
3270 | bool i915_gpu_busy(void) | |
3271 | { | |
3272 | struct drm_i915_private *dev_priv; | |
f047e395 | 3273 | struct intel_ring_buffer *ring; |
eb48eb00 | 3274 | bool ret = false; |
f047e395 | 3275 | int i; |
eb48eb00 | 3276 | |
9270388e | 3277 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
3278 | if (!i915_mch_dev) |
3279 | goto out_unlock; | |
3280 | dev_priv = i915_mch_dev; | |
3281 | ||
f047e395 CW |
3282 | for_each_ring(ring, dev_priv, i) |
3283 | ret |= !list_empty(&ring->request_list); | |
eb48eb00 DV |
3284 | |
3285 | out_unlock: | |
9270388e | 3286 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
3287 | |
3288 | return ret; | |
3289 | } | |
3290 | EXPORT_SYMBOL_GPL(i915_gpu_busy); | |
3291 | ||
3292 | /** | |
3293 | * i915_gpu_turbo_disable - disable graphics turbo | |
3294 | * | |
3295 | * Disable graphics turbo by resetting the max frequency and setting the | |
3296 | * current frequency to the default. | |
3297 | */ | |
3298 | bool i915_gpu_turbo_disable(void) | |
3299 | { | |
3300 | struct drm_i915_private *dev_priv; | |
3301 | bool ret = true; | |
3302 | ||
9270388e | 3303 | spin_lock_irq(&mchdev_lock); |
eb48eb00 DV |
3304 | if (!i915_mch_dev) { |
3305 | ret = false; | |
3306 | goto out_unlock; | |
3307 | } | |
3308 | dev_priv = i915_mch_dev; | |
3309 | ||
20e4d407 | 3310 | dev_priv->ips.max_delay = dev_priv->ips.fstart; |
eb48eb00 | 3311 | |
20e4d407 | 3312 | if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart)) |
eb48eb00 DV |
3313 | ret = false; |
3314 | ||
3315 | out_unlock: | |
9270388e | 3316 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
3317 | |
3318 | return ret; | |
3319 | } | |
3320 | EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); | |
3321 | ||
3322 | /** | |
3323 | * Tells the intel_ips driver that the i915 driver is now loaded, if | |
3324 | * IPS got loaded first. | |
3325 | * | |
3326 | * This awkward dance is so that neither module has to depend on the | |
3327 | * other in order for IPS to do the appropriate communication of | |
3328 | * GPU turbo limits to i915. | |
3329 | */ | |
3330 | static void | |
3331 | ips_ping_for_i915_load(void) | |
3332 | { | |
3333 | void (*link)(void); | |
3334 | ||
3335 | link = symbol_get(ips_link_to_i915_driver); | |
3336 | if (link) { | |
3337 | link(); | |
3338 | symbol_put(ips_link_to_i915_driver); | |
3339 | } | |
3340 | } | |
3341 | ||
3342 | void intel_gpu_ips_init(struct drm_i915_private *dev_priv) | |
3343 | { | |
02d71956 DV |
3344 | /* We only register the i915 ips part with intel-ips once everything is |
3345 | * set up, to avoid intel-ips sneaking in and reading bogus values. */ | |
9270388e | 3346 | spin_lock_irq(&mchdev_lock); |
eb48eb00 | 3347 | i915_mch_dev = dev_priv; |
9270388e | 3348 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 DV |
3349 | |
3350 | ips_ping_for_i915_load(); | |
3351 | } | |
3352 | ||
3353 | void intel_gpu_ips_teardown(void) | |
3354 | { | |
9270388e | 3355 | spin_lock_irq(&mchdev_lock); |
eb48eb00 | 3356 | i915_mch_dev = NULL; |
9270388e | 3357 | spin_unlock_irq(&mchdev_lock); |
eb48eb00 | 3358 | } |
8090c6b9 | 3359 | static void intel_init_emon(struct drm_device *dev) |
dde18883 ED |
3360 | { |
3361 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3362 | u32 lcfuse; | |
3363 | u8 pxw[16]; | |
3364 | int i; | |
3365 | ||
3366 | /* Disable to program */ | |
3367 | I915_WRITE(ECR, 0); | |
3368 | POSTING_READ(ECR); | |
3369 | ||
3370 | /* Program energy weights for various events */ | |
3371 | I915_WRITE(SDEW, 0x15040d00); | |
3372 | I915_WRITE(CSIEW0, 0x007f0000); | |
3373 | I915_WRITE(CSIEW1, 0x1e220004); | |
3374 | I915_WRITE(CSIEW2, 0x04000004); | |
3375 | ||
3376 | for (i = 0; i < 5; i++) | |
3377 | I915_WRITE(PEW + (i * 4), 0); | |
3378 | for (i = 0; i < 3; i++) | |
3379 | I915_WRITE(DEW + (i * 4), 0); | |
3380 | ||
3381 | /* Program P-state weights to account for frequency power adjustment */ | |
3382 | for (i = 0; i < 16; i++) { | |
3383 | u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4)); | |
3384 | unsigned long freq = intel_pxfreq(pxvidfreq); | |
3385 | unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >> | |
3386 | PXVFREQ_PX_SHIFT; | |
3387 | unsigned long val; | |
3388 | ||
3389 | val = vid * vid; | |
3390 | val *= (freq / 1000); | |
3391 | val *= 255; | |
3392 | val /= (127*127*900); | |
3393 | if (val > 0xff) | |
3394 | DRM_ERROR("bad pxval: %ld\n", val); | |
3395 | pxw[i] = val; | |
3396 | } | |
3397 | /* Render standby states get 0 weight */ | |
3398 | pxw[14] = 0; | |
3399 | pxw[15] = 0; | |
3400 | ||
3401 | for (i = 0; i < 4; i++) { | |
3402 | u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) | | |
3403 | (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]); | |
3404 | I915_WRITE(PXW + (i * 4), val); | |
3405 | } | |
3406 | ||
3407 | /* Adjust magic regs to magic values (more experimental results) */ | |
3408 | I915_WRITE(OGW0, 0); | |
3409 | I915_WRITE(OGW1, 0); | |
3410 | I915_WRITE(EG0, 0x00007f00); | |
3411 | I915_WRITE(EG1, 0x0000000e); | |
3412 | I915_WRITE(EG2, 0x000e0000); | |
3413 | I915_WRITE(EG3, 0x68000300); | |
3414 | I915_WRITE(EG4, 0x42000000); | |
3415 | I915_WRITE(EG5, 0x00140031); | |
3416 | I915_WRITE(EG6, 0); | |
3417 | I915_WRITE(EG7, 0); | |
3418 | ||
3419 | for (i = 0; i < 8; i++) | |
3420 | I915_WRITE(PXWL + (i * 4), 0); | |
3421 | ||
3422 | /* Enable PMON + select events */ | |
3423 | I915_WRITE(ECR, 0x80000019); | |
3424 | ||
3425 | lcfuse = I915_READ(LCFUSE02); | |
3426 | ||
20e4d407 | 3427 | dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK); |
dde18883 ED |
3428 | } |
3429 | ||
8090c6b9 DV |
3430 | void intel_disable_gt_powersave(struct drm_device *dev) |
3431 | { | |
1a01ab3b JB |
3432 | struct drm_i915_private *dev_priv = dev->dev_private; |
3433 | ||
930ebb46 | 3434 | if (IS_IRONLAKE_M(dev)) { |
8090c6b9 | 3435 | ironlake_disable_drps(dev); |
930ebb46 DV |
3436 | ironlake_disable_rc6(dev); |
3437 | } else if (INTEL_INFO(dev)->gen >= 6 && !IS_VALLEYVIEW(dev)) { | |
1a01ab3b | 3438 | cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work); |
4fc688ce | 3439 | mutex_lock(&dev_priv->rps.hw_lock); |
8090c6b9 | 3440 | gen6_disable_rps(dev); |
4fc688ce | 3441 | mutex_unlock(&dev_priv->rps.hw_lock); |
930ebb46 | 3442 | } |
8090c6b9 DV |
3443 | } |
3444 | ||
1a01ab3b JB |
3445 | static void intel_gen6_powersave_work(struct work_struct *work) |
3446 | { | |
3447 | struct drm_i915_private *dev_priv = | |
3448 | container_of(work, struct drm_i915_private, | |
3449 | rps.delayed_resume_work.work); | |
3450 | struct drm_device *dev = dev_priv->dev; | |
3451 | ||
4fc688ce | 3452 | mutex_lock(&dev_priv->rps.hw_lock); |
1a01ab3b JB |
3453 | gen6_enable_rps(dev); |
3454 | gen6_update_ring_freq(dev); | |
4fc688ce | 3455 | mutex_unlock(&dev_priv->rps.hw_lock); |
1a01ab3b JB |
3456 | } |
3457 | ||
8090c6b9 DV |
3458 | void intel_enable_gt_powersave(struct drm_device *dev) |
3459 | { | |
1a01ab3b JB |
3460 | struct drm_i915_private *dev_priv = dev->dev_private; |
3461 | ||
8090c6b9 DV |
3462 | if (IS_IRONLAKE_M(dev)) { |
3463 | ironlake_enable_drps(dev); | |
3464 | ironlake_enable_rc6(dev); | |
3465 | intel_init_emon(dev); | |
7cf50fc8 | 3466 | } else if ((IS_GEN6(dev) || IS_GEN7(dev)) && !IS_VALLEYVIEW(dev)) { |
1a01ab3b JB |
3467 | /* |
3468 | * PCU communication is slow and this doesn't need to be | |
3469 | * done at any specific time, so do this out of our fast path | |
3470 | * to make resume and init faster. | |
3471 | */ | |
3472 | schedule_delayed_work(&dev_priv->rps.delayed_resume_work, | |
3473 | round_jiffies_up_relative(HZ)); | |
8090c6b9 DV |
3474 | } |
3475 | } | |
3476 | ||
3107bd48 DV |
3477 | static void ibx_init_clock_gating(struct drm_device *dev) |
3478 | { | |
3479 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3480 | ||
3481 | /* | |
3482 | * On Ibex Peak and Cougar Point, we need to disable clock | |
3483 | * gating for the panel power sequencer or it will fail to | |
3484 | * start up when no ports are active. | |
3485 | */ | |
3486 | I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); | |
3487 | } | |
3488 | ||
1fa61106 | 3489 | static void ironlake_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3490 | { |
3491 | struct drm_i915_private *dev_priv = dev->dev_private; | |
231e54f6 | 3492 | uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; |
6f1d69b0 ED |
3493 | |
3494 | /* Required for FBC */ | |
4d47e4f5 DL |
3495 | dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE | |
3496 | ILK_DPFCUNIT_CLOCK_GATE_DISABLE | | |
3497 | ILK_DPFDUNIT_CLOCK_GATE_ENABLE; | |
6f1d69b0 ED |
3498 | |
3499 | I915_WRITE(PCH_3DCGDIS0, | |
3500 | MARIUNIT_CLOCK_GATE_DISABLE | | |
3501 | SVSMUNIT_CLOCK_GATE_DISABLE); | |
3502 | I915_WRITE(PCH_3DCGDIS1, | |
3503 | VFMUNIT_CLOCK_GATE_DISABLE); | |
3504 | ||
6f1d69b0 ED |
3505 | /* |
3506 | * According to the spec the following bits should be set in | |
3507 | * order to enable memory self-refresh | |
3508 | * The bit 22/21 of 0x42004 | |
3509 | * The bit 5 of 0x42020 | |
3510 | * The bit 15 of 0x45000 | |
3511 | */ | |
3512 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
3513 | (I915_READ(ILK_DISPLAY_CHICKEN2) | | |
3514 | ILK_DPARB_GATE | ILK_VSDPFD_FULL)); | |
4d47e4f5 | 3515 | dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE; |
6f1d69b0 ED |
3516 | I915_WRITE(DISP_ARB_CTL, |
3517 | (I915_READ(DISP_ARB_CTL) | | |
3518 | DISP_FBC_WM_DIS)); | |
3519 | I915_WRITE(WM3_LP_ILK, 0); | |
3520 | I915_WRITE(WM2_LP_ILK, 0); | |
3521 | I915_WRITE(WM1_LP_ILK, 0); | |
3522 | ||
3523 | /* | |
3524 | * Based on the document from hardware guys the following bits | |
3525 | * should be set unconditionally in order to enable FBC. | |
3526 | * The bit 22 of 0x42000 | |
3527 | * The bit 22 of 0x42004 | |
3528 | * The bit 7,8,9 of 0x42020. | |
3529 | */ | |
3530 | if (IS_IRONLAKE_M(dev)) { | |
3531 | I915_WRITE(ILK_DISPLAY_CHICKEN1, | |
3532 | I915_READ(ILK_DISPLAY_CHICKEN1) | | |
3533 | ILK_FBCQ_DIS); | |
3534 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
3535 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
3536 | ILK_DPARB_GATE); | |
6f1d69b0 ED |
3537 | } |
3538 | ||
4d47e4f5 DL |
3539 | I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); |
3540 | ||
6f1d69b0 ED |
3541 | I915_WRITE(ILK_DISPLAY_CHICKEN2, |
3542 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
3543 | ILK_ELPIN_409_SELECT); | |
3544 | I915_WRITE(_3D_CHICKEN2, | |
3545 | _3D_CHICKEN2_WM_READ_PIPELINED << 16 | | |
3546 | _3D_CHICKEN2_WM_READ_PIPELINED); | |
4358a374 DV |
3547 | |
3548 | /* WaDisableRenderCachePipelinedFlush */ | |
3549 | I915_WRITE(CACHE_MODE_0, | |
3550 | _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); | |
3107bd48 DV |
3551 | |
3552 | ibx_init_clock_gating(dev); | |
3553 | } | |
3554 | ||
3555 | static void cpt_init_clock_gating(struct drm_device *dev) | |
3556 | { | |
3557 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3558 | int pipe; | |
3559 | ||
3560 | /* | |
3561 | * On Ibex Peak and Cougar Point, we need to disable clock | |
3562 | * gating for the panel power sequencer or it will fail to | |
3563 | * start up when no ports are active. | |
3564 | */ | |
3565 | I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); | |
3566 | I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) | | |
3567 | DPLS_EDP_PPS_FIX_DIS); | |
335c07b7 TI |
3568 | /* The below fixes the weird display corruption, a few pixels shifted |
3569 | * downward, on (only) LVDS of some HP laptops with IVY. | |
3570 | */ | |
3571 | for_each_pipe(pipe) | |
3572 | I915_WRITE(TRANS_CHICKEN2(pipe), TRANS_CHICKEN2_TIMING_OVERRIDE); | |
3107bd48 DV |
3573 | /* WADP0ClockGatingDisable */ |
3574 | for_each_pipe(pipe) { | |
3575 | I915_WRITE(TRANS_CHICKEN1(pipe), | |
3576 | TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); | |
3577 | } | |
6f1d69b0 ED |
3578 | } |
3579 | ||
1fa61106 | 3580 | static void gen6_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3581 | { |
3582 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3583 | int pipe; | |
231e54f6 | 3584 | uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; |
6f1d69b0 | 3585 | |
231e54f6 | 3586 | I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); |
6f1d69b0 ED |
3587 | |
3588 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
3589 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
3590 | ILK_ELPIN_409_SELECT); | |
3591 | ||
4283908e DV |
3592 | /* WaDisableHiZPlanesWhenMSAAEnabled */ |
3593 | I915_WRITE(_3D_CHICKEN, | |
3594 | _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB)); | |
3595 | ||
6547fbdb DV |
3596 | /* WaSetupGtModeTdRowDispatch */ |
3597 | if (IS_SNB_GT1(dev)) | |
3598 | I915_WRITE(GEN6_GT_MODE, | |
3599 | _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE)); | |
3600 | ||
6f1d69b0 ED |
3601 | I915_WRITE(WM3_LP_ILK, 0); |
3602 | I915_WRITE(WM2_LP_ILK, 0); | |
3603 | I915_WRITE(WM1_LP_ILK, 0); | |
3604 | ||
6f1d69b0 | 3605 | I915_WRITE(CACHE_MODE_0, |
50743298 | 3606 | _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB)); |
6f1d69b0 ED |
3607 | |
3608 | I915_WRITE(GEN6_UCGCTL1, | |
3609 | I915_READ(GEN6_UCGCTL1) | | |
3610 | GEN6_BLBUNIT_CLOCK_GATE_DISABLE | | |
3611 | GEN6_CSUNIT_CLOCK_GATE_DISABLE); | |
3612 | ||
3613 | /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock | |
3614 | * gating disable must be set. Failure to set it results in | |
3615 | * flickering pixels due to Z write ordering failures after | |
3616 | * some amount of runtime in the Mesa "fire" demo, and Unigine | |
3617 | * Sanctuary and Tropics, and apparently anything else with | |
3618 | * alpha test or pixel discard. | |
3619 | * | |
3620 | * According to the spec, bit 11 (RCCUNIT) must also be set, | |
3621 | * but we didn't debug actual testcases to find it out. | |
0f846f81 JB |
3622 | * |
3623 | * Also apply WaDisableVDSUnitClockGating and | |
3624 | * WaDisableRCPBUnitClockGating. | |
6f1d69b0 ED |
3625 | */ |
3626 | I915_WRITE(GEN6_UCGCTL2, | |
0f846f81 | 3627 | GEN7_VDSUNIT_CLOCK_GATE_DISABLE | |
6f1d69b0 ED |
3628 | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | |
3629 | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); | |
3630 | ||
3631 | /* Bspec says we need to always set all mask bits. */ | |
26b6e44a KG |
3632 | I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) | |
3633 | _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL); | |
6f1d69b0 ED |
3634 | |
3635 | /* | |
3636 | * According to the spec the following bits should be | |
3637 | * set in order to enable memory self-refresh and fbc: | |
3638 | * The bit21 and bit22 of 0x42000 | |
3639 | * The bit21 and bit22 of 0x42004 | |
3640 | * The bit5 and bit7 of 0x42020 | |
3641 | * The bit14 of 0x70180 | |
3642 | * The bit14 of 0x71180 | |
3643 | */ | |
3644 | I915_WRITE(ILK_DISPLAY_CHICKEN1, | |
3645 | I915_READ(ILK_DISPLAY_CHICKEN1) | | |
3646 | ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS); | |
3647 | I915_WRITE(ILK_DISPLAY_CHICKEN2, | |
3648 | I915_READ(ILK_DISPLAY_CHICKEN2) | | |
3649 | ILK_DPARB_GATE | ILK_VSDPFD_FULL); | |
231e54f6 DL |
3650 | I915_WRITE(ILK_DSPCLK_GATE_D, |
3651 | I915_READ(ILK_DSPCLK_GATE_D) | | |
3652 | ILK_DPARBUNIT_CLOCK_GATE_ENABLE | | |
3653 | ILK_DPFDUNIT_CLOCK_GATE_ENABLE); | |
6f1d69b0 | 3654 | |
b3bf0766 | 3655 | /* WaMbcDriverBootEnable */ |
b4ae3f22 JB |
3656 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
3657 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
3658 | ||
6f1d69b0 ED |
3659 | for_each_pipe(pipe) { |
3660 | I915_WRITE(DSPCNTR(pipe), | |
3661 | I915_READ(DSPCNTR(pipe)) | | |
3662 | DISPPLANE_TRICKLE_FEED_DISABLE); | |
3663 | intel_flush_display_plane(dev_priv, pipe); | |
3664 | } | |
f8f2ac9a BW |
3665 | |
3666 | /* The default value should be 0x200 according to docs, but the two | |
3667 | * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */ | |
3668 | I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff)); | |
3669 | I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI)); | |
3107bd48 DV |
3670 | |
3671 | cpt_init_clock_gating(dev); | |
6f1d69b0 ED |
3672 | } |
3673 | ||
3674 | static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv) | |
3675 | { | |
3676 | uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE); | |
3677 | ||
3678 | reg &= ~GEN7_FF_SCHED_MASK; | |
3679 | reg |= GEN7_FF_TS_SCHED_HW; | |
3680 | reg |= GEN7_FF_VS_SCHED_HW; | |
3681 | reg |= GEN7_FF_DS_SCHED_HW; | |
3682 | ||
3683 | I915_WRITE(GEN7_FF_THREAD_MODE, reg); | |
3684 | } | |
3685 | ||
17a303ec PZ |
3686 | static void lpt_init_clock_gating(struct drm_device *dev) |
3687 | { | |
3688 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3689 | ||
3690 | /* | |
3691 | * TODO: this bit should only be enabled when really needed, then | |
3692 | * disabled when not needed anymore in order to save power. | |
3693 | */ | |
3694 | if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) | |
3695 | I915_WRITE(SOUTH_DSPCLK_GATE_D, | |
3696 | I915_READ(SOUTH_DSPCLK_GATE_D) | | |
3697 | PCH_LP_PARTITION_LEVEL_DISABLE); | |
3698 | } | |
3699 | ||
cad2a2d7 ED |
3700 | static void haswell_init_clock_gating(struct drm_device *dev) |
3701 | { | |
3702 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3703 | int pipe; | |
cad2a2d7 ED |
3704 | |
3705 | I915_WRITE(WM3_LP_ILK, 0); | |
3706 | I915_WRITE(WM2_LP_ILK, 0); | |
3707 | I915_WRITE(WM1_LP_ILK, 0); | |
3708 | ||
3709 | /* According to the spec, bit 13 (RCZUNIT) must be set on IVB. | |
3710 | * This implements the WaDisableRCZUnitClockGating workaround. | |
3711 | */ | |
3712 | I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); | |
3713 | ||
cad2a2d7 ED |
3714 | /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */ |
3715 | I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, | |
3716 | GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); | |
3717 | ||
3718 | /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ | |
3719 | I915_WRITE(GEN7_L3CNTLREG1, | |
3720 | GEN7_WA_FOR_GEN7_L3_CONTROL); | |
3721 | I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, | |
3722 | GEN7_WA_L3_CHICKEN_MODE); | |
3723 | ||
3724 | /* This is required by WaCatErrorRejectionIssue */ | |
3725 | I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, | |
3726 | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | | |
3727 | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); | |
3728 | ||
3729 | for_each_pipe(pipe) { | |
3730 | I915_WRITE(DSPCNTR(pipe), | |
3731 | I915_READ(DSPCNTR(pipe)) | | |
3732 | DISPPLANE_TRICKLE_FEED_DISABLE); | |
3733 | intel_flush_display_plane(dev_priv, pipe); | |
3734 | } | |
3735 | ||
3736 | gen7_setup_fixed_func_scheduler(dev_priv); | |
3737 | ||
3738 | /* WaDisable4x2SubspanOptimization */ | |
3739 | I915_WRITE(CACHE_MODE_1, | |
3740 | _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); | |
1544d9d5 | 3741 | |
b3bf0766 PZ |
3742 | /* WaMbcDriverBootEnable */ |
3743 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | | |
3744 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
3745 | ||
1544d9d5 ED |
3746 | /* XXX: This is a workaround for early silicon revisions and should be |
3747 | * removed later. | |
3748 | */ | |
3749 | I915_WRITE(WM_DBG, | |
3750 | I915_READ(WM_DBG) | | |
3751 | WM_DBG_DISALLOW_MULTIPLE_LP | | |
3752 | WM_DBG_DISALLOW_SPRITE | | |
3753 | WM_DBG_DISALLOW_MAXFIFO); | |
3754 | ||
17a303ec | 3755 | lpt_init_clock_gating(dev); |
cad2a2d7 ED |
3756 | } |
3757 | ||
1fa61106 | 3758 | static void ivybridge_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3759 | { |
3760 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3761 | int pipe; | |
20848223 | 3762 | uint32_t snpcr; |
6f1d69b0 | 3763 | |
6f1d69b0 ED |
3764 | I915_WRITE(WM3_LP_ILK, 0); |
3765 | I915_WRITE(WM2_LP_ILK, 0); | |
3766 | I915_WRITE(WM1_LP_ILK, 0); | |
3767 | ||
231e54f6 | 3768 | I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); |
6f1d69b0 | 3769 | |
87f8020e JB |
3770 | /* WaDisableEarlyCull */ |
3771 | I915_WRITE(_3D_CHICKEN3, | |
3772 | _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); | |
3773 | ||
62cb944f | 3774 | /* WaDisableBackToBackFlipFix */ |
6f1d69b0 ED |
3775 | I915_WRITE(IVB_CHICKEN3, |
3776 | CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | | |
3777 | CHICKEN3_DGMG_DONE_FIX_DISABLE); | |
3778 | ||
12f3382b JB |
3779 | /* WaDisablePSDDualDispatchEnable */ |
3780 | if (IS_IVB_GT1(dev)) | |
3781 | I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, | |
3782 | _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); | |
3783 | else | |
3784 | I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2, | |
3785 | _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); | |
3786 | ||
6f1d69b0 ED |
3787 | /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */ |
3788 | I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, | |
3789 | GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); | |
3790 | ||
3791 | /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ | |
3792 | I915_WRITE(GEN7_L3CNTLREG1, | |
3793 | GEN7_WA_FOR_GEN7_L3_CONTROL); | |
3794 | I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, | |
8ab43976 JB |
3795 | GEN7_WA_L3_CHICKEN_MODE); |
3796 | if (IS_IVB_GT1(dev)) | |
3797 | I915_WRITE(GEN7_ROW_CHICKEN2, | |
3798 | _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); | |
3799 | else | |
3800 | I915_WRITE(GEN7_ROW_CHICKEN2_GT2, | |
3801 | _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); | |
3802 | ||
6f1d69b0 | 3803 | |
61939d97 JB |
3804 | /* WaForceL3Serialization */ |
3805 | I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & | |
3806 | ~L3SQ_URB_READ_CAM_MATCH_DISABLE); | |
3807 | ||
0f846f81 JB |
3808 | /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock |
3809 | * gating disable must be set. Failure to set it results in | |
3810 | * flickering pixels due to Z write ordering failures after | |
3811 | * some amount of runtime in the Mesa "fire" demo, and Unigine | |
3812 | * Sanctuary and Tropics, and apparently anything else with | |
3813 | * alpha test or pixel discard. | |
3814 | * | |
3815 | * According to the spec, bit 11 (RCCUNIT) must also be set, | |
3816 | * but we didn't debug actual testcases to find it out. | |
3817 | * | |
3818 | * According to the spec, bit 13 (RCZUNIT) must be set on IVB. | |
3819 | * This implements the WaDisableRCZUnitClockGating workaround. | |
3820 | */ | |
3821 | I915_WRITE(GEN6_UCGCTL2, | |
3822 | GEN6_RCZUNIT_CLOCK_GATE_DISABLE | | |
3823 | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); | |
3824 | ||
6f1d69b0 ED |
3825 | /* This is required by WaCatErrorRejectionIssue */ |
3826 | I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, | |
3827 | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | | |
3828 | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); | |
3829 | ||
3830 | for_each_pipe(pipe) { | |
3831 | I915_WRITE(DSPCNTR(pipe), | |
3832 | I915_READ(DSPCNTR(pipe)) | | |
3833 | DISPPLANE_TRICKLE_FEED_DISABLE); | |
3834 | intel_flush_display_plane(dev_priv, pipe); | |
3835 | } | |
3836 | ||
b3bf0766 | 3837 | /* WaMbcDriverBootEnable */ |
b4ae3f22 JB |
3838 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
3839 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
3840 | ||
6f1d69b0 | 3841 | gen7_setup_fixed_func_scheduler(dev_priv); |
97e1930f DV |
3842 | |
3843 | /* WaDisable4x2SubspanOptimization */ | |
3844 | I915_WRITE(CACHE_MODE_1, | |
3845 | _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); | |
20848223 BW |
3846 | |
3847 | snpcr = I915_READ(GEN6_MBCUNIT_SNPCR); | |
3848 | snpcr &= ~GEN6_MBC_SNPCR_MASK; | |
3849 | snpcr |= GEN6_MBC_SNPCR_MED; | |
3850 | I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr); | |
3107bd48 DV |
3851 | |
3852 | cpt_init_clock_gating(dev); | |
6f1d69b0 ED |
3853 | } |
3854 | ||
1fa61106 | 3855 | static void valleyview_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3856 | { |
3857 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3858 | int pipe; | |
6f1d69b0 ED |
3859 | |
3860 | I915_WRITE(WM3_LP_ILK, 0); | |
3861 | I915_WRITE(WM2_LP_ILK, 0); | |
3862 | I915_WRITE(WM1_LP_ILK, 0); | |
3863 | ||
231e54f6 | 3864 | I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); |
6f1d69b0 | 3865 | |
87f8020e JB |
3866 | /* WaDisableEarlyCull */ |
3867 | I915_WRITE(_3D_CHICKEN3, | |
3868 | _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); | |
3869 | ||
62cb944f | 3870 | /* WaDisableBackToBackFlipFix */ |
6f1d69b0 ED |
3871 | I915_WRITE(IVB_CHICKEN3, |
3872 | CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | | |
3873 | CHICKEN3_DGMG_DONE_FIX_DISABLE); | |
3874 | ||
12f3382b JB |
3875 | I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, |
3876 | _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); | |
3877 | ||
6f1d69b0 ED |
3878 | /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */ |
3879 | I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, | |
3880 | GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); | |
3881 | ||
3882 | /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ | |
d0cf5ead | 3883 | I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS); |
6f1d69b0 ED |
3884 | I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); |
3885 | ||
61939d97 JB |
3886 | /* WaForceL3Serialization */ |
3887 | I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & | |
3888 | ~L3SQ_URB_READ_CAM_MATCH_DISABLE); | |
3889 | ||
8ab43976 JB |
3890 | /* WaDisableDopClockGating */ |
3891 | I915_WRITE(GEN7_ROW_CHICKEN2, | |
3892 | _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); | |
3893 | ||
5c9664d7 JB |
3894 | /* WaForceL3Serialization */ |
3895 | I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & | |
3896 | ~L3SQ_URB_READ_CAM_MATCH_DISABLE); | |
3897 | ||
6f1d69b0 ED |
3898 | /* This is required by WaCatErrorRejectionIssue */ |
3899 | I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, | |
3900 | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | | |
3901 | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); | |
3902 | ||
b3bf0766 | 3903 | /* WaMbcDriverBootEnable */ |
b4ae3f22 JB |
3904 | I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
3905 | GEN6_MBCTL_ENABLE_BOOT_FETCH); | |
3906 | ||
0f846f81 JB |
3907 | |
3908 | /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock | |
3909 | * gating disable must be set. Failure to set it results in | |
3910 | * flickering pixels due to Z write ordering failures after | |
3911 | * some amount of runtime in the Mesa "fire" demo, and Unigine | |
3912 | * Sanctuary and Tropics, and apparently anything else with | |
3913 | * alpha test or pixel discard. | |
3914 | * | |
3915 | * According to the spec, bit 11 (RCCUNIT) must also be set, | |
3916 | * but we didn't debug actual testcases to find it out. | |
3917 | * | |
3918 | * According to the spec, bit 13 (RCZUNIT) must be set on IVB. | |
3919 | * This implements the WaDisableRCZUnitClockGating workaround. | |
3920 | * | |
3921 | * Also apply WaDisableVDSUnitClockGating and | |
3922 | * WaDisableRCPBUnitClockGating. | |
3923 | */ | |
3924 | I915_WRITE(GEN6_UCGCTL2, | |
3925 | GEN7_VDSUNIT_CLOCK_GATE_DISABLE | | |
6edaa7fc | 3926 | GEN7_TDLUNIT_CLOCK_GATE_DISABLE | |
0f846f81 JB |
3927 | GEN6_RCZUNIT_CLOCK_GATE_DISABLE | |
3928 | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | | |
3929 | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); | |
3930 | ||
e3f33d46 JB |
3931 | I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE); |
3932 | ||
6f1d69b0 ED |
3933 | for_each_pipe(pipe) { |
3934 | I915_WRITE(DSPCNTR(pipe), | |
3935 | I915_READ(DSPCNTR(pipe)) | | |
3936 | DISPPLANE_TRICKLE_FEED_DISABLE); | |
3937 | intel_flush_display_plane(dev_priv, pipe); | |
3938 | } | |
3939 | ||
6b26c86d DV |
3940 | I915_WRITE(CACHE_MODE_1, |
3941 | _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); | |
7983117f JB |
3942 | |
3943 | /* | |
3944 | * On ValleyView, the GUnit needs to signal the GT | |
3945 | * when flip and other events complete. So enable | |
3946 | * all the GUnit->GT interrupts here | |
3947 | */ | |
3948 | I915_WRITE(VLV_DPFLIPSTAT, PIPEB_LINE_COMPARE_INT_EN | | |
3949 | PIPEB_HLINE_INT_EN | PIPEB_VBLANK_INT_EN | | |
3950 | SPRITED_FLIPDONE_INT_EN | SPRITEC_FLIPDONE_INT_EN | | |
3951 | PLANEB_FLIPDONE_INT_EN | PIPEA_LINE_COMPARE_INT_EN | | |
3952 | PIPEA_HLINE_INT_EN | PIPEA_VBLANK_INT_EN | | |
3953 | SPRITEB_FLIPDONE_INT_EN | SPRITEA_FLIPDONE_INT_EN | | |
3954 | PLANEA_FLIPDONE_INT_EN); | |
2d809570 JB |
3955 | |
3956 | /* | |
3957 | * WaDisableVLVClockGating_VBIIssue | |
3958 | * Disable clock gating on th GCFG unit to prevent a delay | |
3959 | * in the reporting of vblank events. | |
3960 | */ | |
3961 | I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS); | |
6f1d69b0 ED |
3962 | } |
3963 | ||
1fa61106 | 3964 | static void g4x_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3965 | { |
3966 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3967 | uint32_t dspclk_gate; | |
3968 | ||
3969 | I915_WRITE(RENCLK_GATE_D1, 0); | |
3970 | I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE | | |
3971 | GS_UNIT_CLOCK_GATE_DISABLE | | |
3972 | CL_UNIT_CLOCK_GATE_DISABLE); | |
3973 | I915_WRITE(RAMCLK_GATE_D, 0); | |
3974 | dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE | | |
3975 | OVRUNIT_CLOCK_GATE_DISABLE | | |
3976 | OVCUNIT_CLOCK_GATE_DISABLE; | |
3977 | if (IS_GM45(dev)) | |
3978 | dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE; | |
3979 | I915_WRITE(DSPCLK_GATE_D, dspclk_gate); | |
4358a374 DV |
3980 | |
3981 | /* WaDisableRenderCachePipelinedFlush */ | |
3982 | I915_WRITE(CACHE_MODE_0, | |
3983 | _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); | |
6f1d69b0 ED |
3984 | } |
3985 | ||
1fa61106 | 3986 | static void crestline_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3987 | { |
3988 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3989 | ||
3990 | I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE); | |
3991 | I915_WRITE(RENCLK_GATE_D2, 0); | |
3992 | I915_WRITE(DSPCLK_GATE_D, 0); | |
3993 | I915_WRITE(RAMCLK_GATE_D, 0); | |
3994 | I915_WRITE16(DEUC, 0); | |
3995 | } | |
3996 | ||
1fa61106 | 3997 | static void broadwater_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
3998 | { |
3999 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4000 | ||
4001 | I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE | | |
4002 | I965_RCC_CLOCK_GATE_DISABLE | | |
4003 | I965_RCPB_CLOCK_GATE_DISABLE | | |
4004 | I965_ISC_CLOCK_GATE_DISABLE | | |
4005 | I965_FBC_CLOCK_GATE_DISABLE); | |
4006 | I915_WRITE(RENCLK_GATE_D2, 0); | |
4007 | } | |
4008 | ||
1fa61106 | 4009 | static void gen3_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4010 | { |
4011 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4012 | u32 dstate = I915_READ(D_STATE); | |
4013 | ||
4014 | dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING | | |
4015 | DSTATE_DOT_CLOCK_GATING; | |
4016 | I915_WRITE(D_STATE, dstate); | |
13a86b85 CW |
4017 | |
4018 | if (IS_PINEVIEW(dev)) | |
4019 | I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY)); | |
974a3b0f DV |
4020 | |
4021 | /* IIR "flip pending" means done if this bit is set */ | |
4022 | I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE)); | |
6f1d69b0 ED |
4023 | } |
4024 | ||
1fa61106 | 4025 | static void i85x_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4026 | { |
4027 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4028 | ||
4029 | I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE); | |
4030 | } | |
4031 | ||
1fa61106 | 4032 | static void i830_init_clock_gating(struct drm_device *dev) |
6f1d69b0 ED |
4033 | { |
4034 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4035 | ||
4036 | I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE); | |
4037 | } | |
4038 | ||
6f1d69b0 ED |
4039 | void intel_init_clock_gating(struct drm_device *dev) |
4040 | { | |
4041 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4042 | ||
4043 | dev_priv->display.init_clock_gating(dev); | |
6f1d69b0 ED |
4044 | } |
4045 | ||
d0d3e513 ED |
4046 | /* Starting with Haswell, we have different power wells for |
4047 | * different parts of the GPU. This attempts to enable them all. | |
4048 | */ | |
4049 | void intel_init_power_wells(struct drm_device *dev) | |
4050 | { | |
4051 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4052 | unsigned long power_wells[] = { | |
4053 | HSW_PWR_WELL_CTL1, | |
4054 | HSW_PWR_WELL_CTL2, | |
4055 | HSW_PWR_WELL_CTL4 | |
4056 | }; | |
4057 | int i; | |
4058 | ||
4059 | if (!IS_HASWELL(dev)) | |
4060 | return; | |
4061 | ||
4062 | mutex_lock(&dev->struct_mutex); | |
4063 | ||
4064 | for (i = 0; i < ARRAY_SIZE(power_wells); i++) { | |
4065 | int well = I915_READ(power_wells[i]); | |
4066 | ||
4067 | if ((well & HSW_PWR_WELL_STATE) == 0) { | |
4068 | I915_WRITE(power_wells[i], well & HSW_PWR_WELL_ENABLE); | |
263b30d4 | 4069 | if (wait_for((I915_READ(power_wells[i]) & HSW_PWR_WELL_STATE), 20)) |
d0d3e513 ED |
4070 | DRM_ERROR("Error enabling power well %lx\n", power_wells[i]); |
4071 | } | |
4072 | } | |
4073 | ||
4074 | mutex_unlock(&dev->struct_mutex); | |
4075 | } | |
4076 | ||
1fa61106 ED |
4077 | /* Set up chip specific power management-related functions */ |
4078 | void intel_init_pm(struct drm_device *dev) | |
4079 | { | |
4080 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4081 | ||
4082 | if (I915_HAS_FBC(dev)) { | |
4083 | if (HAS_PCH_SPLIT(dev)) { | |
4084 | dev_priv->display.fbc_enabled = ironlake_fbc_enabled; | |
4085 | dev_priv->display.enable_fbc = ironlake_enable_fbc; | |
4086 | dev_priv->display.disable_fbc = ironlake_disable_fbc; | |
4087 | } else if (IS_GM45(dev)) { | |
4088 | dev_priv->display.fbc_enabled = g4x_fbc_enabled; | |
4089 | dev_priv->display.enable_fbc = g4x_enable_fbc; | |
4090 | dev_priv->display.disable_fbc = g4x_disable_fbc; | |
4091 | } else if (IS_CRESTLINE(dev)) { | |
4092 | dev_priv->display.fbc_enabled = i8xx_fbc_enabled; | |
4093 | dev_priv->display.enable_fbc = i8xx_enable_fbc; | |
4094 | dev_priv->display.disable_fbc = i8xx_disable_fbc; | |
4095 | } | |
4096 | /* 855GM needs testing */ | |
4097 | } | |
4098 | ||
c921aba8 DV |
4099 | /* For cxsr */ |
4100 | if (IS_PINEVIEW(dev)) | |
4101 | i915_pineview_get_mem_freq(dev); | |
4102 | else if (IS_GEN5(dev)) | |
4103 | i915_ironlake_get_mem_freq(dev); | |
4104 | ||
1fa61106 ED |
4105 | /* For FIFO watermark updates */ |
4106 | if (HAS_PCH_SPLIT(dev)) { | |
1fa61106 ED |
4107 | if (IS_GEN5(dev)) { |
4108 | if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK) | |
4109 | dev_priv->display.update_wm = ironlake_update_wm; | |
4110 | else { | |
4111 | DRM_DEBUG_KMS("Failed to get proper latency. " | |
4112 | "Disable CxSR\n"); | |
4113 | dev_priv->display.update_wm = NULL; | |
4114 | } | |
4115 | dev_priv->display.init_clock_gating = ironlake_init_clock_gating; | |
4116 | } else if (IS_GEN6(dev)) { | |
4117 | if (SNB_READ_WM0_LATENCY()) { | |
4118 | dev_priv->display.update_wm = sandybridge_update_wm; | |
4119 | dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; | |
4120 | } else { | |
4121 | DRM_DEBUG_KMS("Failed to read display plane latency. " | |
4122 | "Disable CxSR\n"); | |
4123 | dev_priv->display.update_wm = NULL; | |
4124 | } | |
4125 | dev_priv->display.init_clock_gating = gen6_init_clock_gating; | |
4126 | } else if (IS_IVYBRIDGE(dev)) { | |
4127 | /* FIXME: detect B0+ stepping and use auto training */ | |
4128 | if (SNB_READ_WM0_LATENCY()) { | |
c43d0188 | 4129 | dev_priv->display.update_wm = ivybridge_update_wm; |
1fa61106 ED |
4130 | dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; |
4131 | } else { | |
4132 | DRM_DEBUG_KMS("Failed to read display plane latency. " | |
4133 | "Disable CxSR\n"); | |
4134 | dev_priv->display.update_wm = NULL; | |
4135 | } | |
4136 | dev_priv->display.init_clock_gating = ivybridge_init_clock_gating; | |
6b8a5eeb ED |
4137 | } else if (IS_HASWELL(dev)) { |
4138 | if (SNB_READ_WM0_LATENCY()) { | |
4139 | dev_priv->display.update_wm = sandybridge_update_wm; | |
4140 | dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; | |
1f8eeabf | 4141 | dev_priv->display.update_linetime_wm = haswell_update_linetime_wm; |
6b8a5eeb ED |
4142 | } else { |
4143 | DRM_DEBUG_KMS("Failed to read display plane latency. " | |
4144 | "Disable CxSR\n"); | |
4145 | dev_priv->display.update_wm = NULL; | |
4146 | } | |
cad2a2d7 | 4147 | dev_priv->display.init_clock_gating = haswell_init_clock_gating; |
1fa61106 ED |
4148 | } else |
4149 | dev_priv->display.update_wm = NULL; | |
4150 | } else if (IS_VALLEYVIEW(dev)) { | |
4151 | dev_priv->display.update_wm = valleyview_update_wm; | |
4152 | dev_priv->display.init_clock_gating = | |
4153 | valleyview_init_clock_gating; | |
1fa61106 ED |
4154 | } else if (IS_PINEVIEW(dev)) { |
4155 | if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev), | |
4156 | dev_priv->is_ddr3, | |
4157 | dev_priv->fsb_freq, | |
4158 | dev_priv->mem_freq)) { | |
4159 | DRM_INFO("failed to find known CxSR latency " | |
4160 | "(found ddr%s fsb freq %d, mem freq %d), " | |
4161 | "disabling CxSR\n", | |
4162 | (dev_priv->is_ddr3 == 1) ? "3" : "2", | |
4163 | dev_priv->fsb_freq, dev_priv->mem_freq); | |
4164 | /* Disable CxSR and never update its watermark again */ | |
4165 | pineview_disable_cxsr(dev); | |
4166 | dev_priv->display.update_wm = NULL; | |
4167 | } else | |
4168 | dev_priv->display.update_wm = pineview_update_wm; | |
4169 | dev_priv->display.init_clock_gating = gen3_init_clock_gating; | |
4170 | } else if (IS_G4X(dev)) { | |
4171 | dev_priv->display.update_wm = g4x_update_wm; | |
4172 | dev_priv->display.init_clock_gating = g4x_init_clock_gating; | |
4173 | } else if (IS_GEN4(dev)) { | |
4174 | dev_priv->display.update_wm = i965_update_wm; | |
4175 | if (IS_CRESTLINE(dev)) | |
4176 | dev_priv->display.init_clock_gating = crestline_init_clock_gating; | |
4177 | else if (IS_BROADWATER(dev)) | |
4178 | dev_priv->display.init_clock_gating = broadwater_init_clock_gating; | |
4179 | } else if (IS_GEN3(dev)) { | |
4180 | dev_priv->display.update_wm = i9xx_update_wm; | |
4181 | dev_priv->display.get_fifo_size = i9xx_get_fifo_size; | |
4182 | dev_priv->display.init_clock_gating = gen3_init_clock_gating; | |
4183 | } else if (IS_I865G(dev)) { | |
4184 | dev_priv->display.update_wm = i830_update_wm; | |
4185 | dev_priv->display.init_clock_gating = i85x_init_clock_gating; | |
4186 | dev_priv->display.get_fifo_size = i830_get_fifo_size; | |
4187 | } else if (IS_I85X(dev)) { | |
4188 | dev_priv->display.update_wm = i9xx_update_wm; | |
4189 | dev_priv->display.get_fifo_size = i85x_get_fifo_size; | |
4190 | dev_priv->display.init_clock_gating = i85x_init_clock_gating; | |
4191 | } else { | |
4192 | dev_priv->display.update_wm = i830_update_wm; | |
4193 | dev_priv->display.init_clock_gating = i830_init_clock_gating; | |
4194 | if (IS_845G(dev)) | |
4195 | dev_priv->display.get_fifo_size = i845_get_fifo_size; | |
4196 | else | |
4197 | dev_priv->display.get_fifo_size = i830_get_fifo_size; | |
4198 | } | |
4199 | } | |
4200 | ||
6590190d ED |
4201 | static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv) |
4202 | { | |
4203 | u32 gt_thread_status_mask; | |
4204 | ||
4205 | if (IS_HASWELL(dev_priv->dev)) | |
4206 | gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW; | |
4207 | else | |
4208 | gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK; | |
4209 | ||
4210 | /* w/a for a sporadic read returning 0 by waiting for the GT | |
4211 | * thread to wake up. | |
4212 | */ | |
4213 | if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500)) | |
4214 | DRM_ERROR("GT thread status wait timed out\n"); | |
4215 | } | |
4216 | ||
16995a9f CW |
4217 | static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv) |
4218 | { | |
4219 | I915_WRITE_NOTRACE(FORCEWAKE, 0); | |
4220 | POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ | |
4221 | } | |
4222 | ||
6590190d ED |
4223 | static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) |
4224 | { | |
4225 | u32 forcewake_ack; | |
4226 | ||
4227 | if (IS_HASWELL(dev_priv->dev)) | |
4228 | forcewake_ack = FORCEWAKE_ACK_HSW; | |
4229 | else | |
4230 | forcewake_ack = FORCEWAKE_ACK; | |
4231 | ||
057d3860 BW |
4232 | if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, |
4233 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
8a038fd6 | 4234 | DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); |
6590190d | 4235 | |
c5836c27 | 4236 | I915_WRITE_NOTRACE(FORCEWAKE, FORCEWAKE_KERNEL); |
8dee3eea | 4237 | POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ |
6590190d | 4238 | |
057d3860 BW |
4239 | if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1), |
4240 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
8a038fd6 | 4241 | DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); |
6590190d ED |
4242 | |
4243 | __gen6_gt_wait_for_thread_c0(dev_priv); | |
4244 | } | |
4245 | ||
16995a9f CW |
4246 | static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv) |
4247 | { | |
4248 | I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff)); | |
4249 | POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ | |
4250 | } | |
4251 | ||
6590190d ED |
4252 | static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv) |
4253 | { | |
4254 | u32 forcewake_ack; | |
4255 | ||
4256 | if (IS_HASWELL(dev_priv->dev)) | |
4257 | forcewake_ack = FORCEWAKE_ACK_HSW; | |
4258 | else | |
4259 | forcewake_ack = FORCEWAKE_MT_ACK; | |
4260 | ||
057d3860 BW |
4261 | if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, |
4262 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
8a038fd6 | 4263 | DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); |
6590190d | 4264 | |
c5836c27 | 4265 | I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); |
8dee3eea | 4266 | POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ |
6590190d | 4267 | |
057d3860 BW |
4268 | if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1), |
4269 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
8a038fd6 | 4270 | DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); |
6590190d ED |
4271 | |
4272 | __gen6_gt_wait_for_thread_c0(dev_priv); | |
4273 | } | |
4274 | ||
4275 | /* | |
4276 | * Generally this is called implicitly by the register read function. However, | |
4277 | * if some sequence requires the GT to not power down then this function should | |
4278 | * be called at the beginning of the sequence followed by a call to | |
4279 | * gen6_gt_force_wake_put() at the end of the sequence. | |
4280 | */ | |
4281 | void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) | |
4282 | { | |
4283 | unsigned long irqflags; | |
4284 | ||
4285 | spin_lock_irqsave(&dev_priv->gt_lock, irqflags); | |
4286 | if (dev_priv->forcewake_count++ == 0) | |
4287 | dev_priv->gt.force_wake_get(dev_priv); | |
4288 | spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); | |
4289 | } | |
4290 | ||
4291 | void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv) | |
4292 | { | |
4293 | u32 gtfifodbg; | |
4294 | gtfifodbg = I915_READ_NOTRACE(GTFIFODBG); | |
4295 | if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK, | |
4296 | "MMIO read or write has been dropped %x\n", gtfifodbg)) | |
4297 | I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK); | |
4298 | } | |
4299 | ||
4300 | static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) | |
4301 | { | |
4302 | I915_WRITE_NOTRACE(FORCEWAKE, 0); | |
8dee3eea | 4303 | /* gen6_gt_check_fifodbg doubles as the POSTING_READ */ |
6590190d ED |
4304 | gen6_gt_check_fifodbg(dev_priv); |
4305 | } | |
4306 | ||
4307 | static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv) | |
4308 | { | |
c5836c27 | 4309 | I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); |
8dee3eea | 4310 | /* gen6_gt_check_fifodbg doubles as the POSTING_READ */ |
6590190d ED |
4311 | gen6_gt_check_fifodbg(dev_priv); |
4312 | } | |
4313 | ||
4314 | /* | |
4315 | * see gen6_gt_force_wake_get() | |
4316 | */ | |
4317 | void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) | |
4318 | { | |
4319 | unsigned long irqflags; | |
4320 | ||
4321 | spin_lock_irqsave(&dev_priv->gt_lock, irqflags); | |
4322 | if (--dev_priv->forcewake_count == 0) | |
4323 | dev_priv->gt.force_wake_put(dev_priv); | |
4324 | spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); | |
4325 | } | |
4326 | ||
4327 | int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) | |
4328 | { | |
4329 | int ret = 0; | |
4330 | ||
4331 | if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) { | |
4332 | int loop = 500; | |
4333 | u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); | |
4334 | while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) { | |
4335 | udelay(10); | |
4336 | fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); | |
4337 | } | |
4338 | if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES)) | |
4339 | ++ret; | |
4340 | dev_priv->gt_fifo_count = fifo; | |
4341 | } | |
4342 | dev_priv->gt_fifo_count--; | |
4343 | ||
4344 | return ret; | |
4345 | } | |
4346 | ||
16995a9f CW |
4347 | static void vlv_force_wake_reset(struct drm_i915_private *dev_priv) |
4348 | { | |
4349 | I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff)); | |
4350 | } | |
4351 | ||
6590190d ED |
4352 | static void vlv_force_wake_get(struct drm_i915_private *dev_priv) |
4353 | { | |
057d3860 BW |
4354 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1) == 0, |
4355 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
8a038fd6 | 4356 | DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); |
6590190d | 4357 | |
c5836c27 | 4358 | I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); |
6590190d | 4359 | |
057d3860 BW |
4360 | if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1), |
4361 | FORCEWAKE_ACK_TIMEOUT_MS)) | |
8a038fd6 | 4362 | DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); |
6590190d ED |
4363 | |
4364 | __gen6_gt_wait_for_thread_c0(dev_priv); | |
4365 | } | |
4366 | ||
4367 | static void vlv_force_wake_put(struct drm_i915_private *dev_priv) | |
4368 | { | |
c5836c27 | 4369 | I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); |
5ab140a4 DV |
4370 | /* The below doubles as a POSTING_READ */ |
4371 | gen6_gt_check_fifodbg(dev_priv); | |
6590190d ED |
4372 | } |
4373 | ||
16995a9f CW |
4374 | void intel_gt_reset(struct drm_device *dev) |
4375 | { | |
4376 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4377 | ||
4378 | if (IS_VALLEYVIEW(dev)) { | |
4379 | vlv_force_wake_reset(dev_priv); | |
4380 | } else if (INTEL_INFO(dev)->gen >= 6) { | |
4381 | __gen6_gt_force_wake_reset(dev_priv); | |
4382 | if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) | |
4383 | __gen6_gt_force_wake_mt_reset(dev_priv); | |
4384 | } | |
4385 | } | |
4386 | ||
6590190d ED |
4387 | void intel_gt_init(struct drm_device *dev) |
4388 | { | |
4389 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4390 | ||
4391 | spin_lock_init(&dev_priv->gt_lock); | |
4392 | ||
16995a9f CW |
4393 | intel_gt_reset(dev); |
4394 | ||
6590190d ED |
4395 | if (IS_VALLEYVIEW(dev)) { |
4396 | dev_priv->gt.force_wake_get = vlv_force_wake_get; | |
4397 | dev_priv->gt.force_wake_put = vlv_force_wake_put; | |
36ec8f87 DV |
4398 | } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { |
4399 | dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; | |
4400 | dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; | |
4401 | } else if (IS_GEN6(dev)) { | |
6590190d ED |
4402 | dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; |
4403 | dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; | |
6590190d | 4404 | } |
1a01ab3b JB |
4405 | INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work, |
4406 | intel_gen6_powersave_work); | |
6590190d ED |
4407 | } |
4408 | ||
42c0526c BW |
4409 | int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val) |
4410 | { | |
4fc688ce | 4411 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
42c0526c BW |
4412 | |
4413 | if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { | |
4414 | DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n"); | |
4415 | return -EAGAIN; | |
4416 | } | |
4417 | ||
4418 | I915_WRITE(GEN6_PCODE_DATA, *val); | |
4419 | I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); | |
4420 | ||
4421 | if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, | |
4422 | 500)) { | |
4423 | DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox); | |
4424 | return -ETIMEDOUT; | |
4425 | } | |
4426 | ||
4427 | *val = I915_READ(GEN6_PCODE_DATA); | |
4428 | I915_WRITE(GEN6_PCODE_DATA, 0); | |
4429 | ||
4430 | return 0; | |
4431 | } | |
4432 | ||
4433 | int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val) | |
4434 | { | |
4fc688ce | 4435 | WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); |
42c0526c BW |
4436 | |
4437 | if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { | |
4438 | DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n"); | |
4439 | return -EAGAIN; | |
4440 | } | |
4441 | ||
4442 | I915_WRITE(GEN6_PCODE_DATA, val); | |
4443 | I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); | |
4444 | ||
4445 | if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, | |
4446 | 500)) { | |
4447 | DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox); | |
4448 | return -ETIMEDOUT; | |
4449 | } | |
4450 | ||
4451 | I915_WRITE(GEN6_PCODE_DATA, 0); | |
4452 | ||
4453 | return 0; | |
4454 | } |