2 * Copyright © 2012 Intel Corporation
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:
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
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
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
28 #include <linux/cpufreq.h>
30 #include "intel_drv.h"
31 #include "../../../platform/x86/intel_ips.h"
32 #include <linux/module.h>
33 #include <drm/i915_powerwell.h>
35 #define FORCEWAKE_ACK_TIMEOUT_MS 2
37 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
38 * framebuffer contents in-memory, aiming at reducing the required bandwidth
39 * during in-memory transfers and, therefore, reduce the power packet.
41 * The benefits of FBC are mostly visible with solid backgrounds and
42 * variation-less patterns.
44 * FBC-related functionality can be enabled by the means of the
45 * i915.i915_enable_fbc parameter
48 static bool intel_crtc_active(struct drm_crtc *crtc)
50 /* Be paranoid as we can arrive here with only partial
51 * state retrieved from the hardware during setup.
53 return to_intel_crtc(crtc)->active && crtc->fb && crtc->mode.clock;
56 static void i8xx_disable_fbc(struct drm_device *dev)
58 struct drm_i915_private *dev_priv = dev->dev_private;
61 /* Disable compression */
62 fbc_ctl = I915_READ(FBC_CONTROL);
63 if ((fbc_ctl & FBC_CTL_EN) == 0)
66 fbc_ctl &= ~FBC_CTL_EN;
67 I915_WRITE(FBC_CONTROL, fbc_ctl);
69 /* Wait for compressing bit to clear */
70 if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
71 DRM_DEBUG_KMS("FBC idle timed out\n");
75 DRM_DEBUG_KMS("disabled FBC\n");
78 static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
80 struct drm_device *dev = crtc->dev;
81 struct drm_i915_private *dev_priv = dev->dev_private;
82 struct drm_framebuffer *fb = crtc->fb;
83 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
84 struct drm_i915_gem_object *obj = intel_fb->obj;
85 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
88 u32 fbc_ctl, fbc_ctl2;
90 cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE;
91 if (fb->pitches[0] < cfb_pitch)
92 cfb_pitch = fb->pitches[0];
94 /* FBC_CTL wants 64B units */
95 cfb_pitch = (cfb_pitch / 64) - 1;
96 plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
99 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
100 I915_WRITE(FBC_TAG + (i * 4), 0);
103 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
105 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
106 I915_WRITE(FBC_FENCE_OFF, crtc->y);
109 fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
111 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
112 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
113 fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
114 fbc_ctl |= obj->fence_reg;
115 I915_WRITE(FBC_CONTROL, fbc_ctl);
117 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ",
118 cfb_pitch, crtc->y, plane_name(intel_crtc->plane));
121 static bool i8xx_fbc_enabled(struct drm_device *dev)
123 struct drm_i915_private *dev_priv = dev->dev_private;
125 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
128 static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
130 struct drm_device *dev = crtc->dev;
131 struct drm_i915_private *dev_priv = dev->dev_private;
132 struct drm_framebuffer *fb = crtc->fb;
133 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
134 struct drm_i915_gem_object *obj = intel_fb->obj;
135 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
136 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
137 unsigned long stall_watermark = 200;
140 dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
141 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
142 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
144 I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
145 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
146 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
147 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
150 I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
152 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
155 static void g4x_disable_fbc(struct drm_device *dev)
157 struct drm_i915_private *dev_priv = dev->dev_private;
160 /* Disable compression */
161 dpfc_ctl = I915_READ(DPFC_CONTROL);
162 if (dpfc_ctl & DPFC_CTL_EN) {
163 dpfc_ctl &= ~DPFC_CTL_EN;
164 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
166 DRM_DEBUG_KMS("disabled FBC\n");
170 static bool g4x_fbc_enabled(struct drm_device *dev)
172 struct drm_i915_private *dev_priv = dev->dev_private;
174 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
177 static void sandybridge_blit_fbc_update(struct drm_device *dev)
179 struct drm_i915_private *dev_priv = dev->dev_private;
182 /* Make sure blitter notifies FBC of writes */
183 gen6_gt_force_wake_get(dev_priv);
184 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
185 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
186 GEN6_BLITTER_LOCK_SHIFT;
187 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
188 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
189 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
190 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
191 GEN6_BLITTER_LOCK_SHIFT);
192 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
193 POSTING_READ(GEN6_BLITTER_ECOSKPD);
194 gen6_gt_force_wake_put(dev_priv);
197 static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
199 struct drm_device *dev = crtc->dev;
200 struct drm_i915_private *dev_priv = dev->dev_private;
201 struct drm_framebuffer *fb = crtc->fb;
202 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
203 struct drm_i915_gem_object *obj = intel_fb->obj;
204 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
205 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
206 unsigned long stall_watermark = 200;
209 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
210 dpfc_ctl &= DPFC_RESERVED;
211 dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
212 /* Set persistent mode for front-buffer rendering, ala X. */
213 dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE;
214 dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg);
215 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
217 I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
218 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
219 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
220 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
221 I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
223 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
226 I915_WRITE(SNB_DPFC_CTL_SA,
227 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
228 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
229 sandybridge_blit_fbc_update(dev);
232 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
235 static void ironlake_disable_fbc(struct drm_device *dev)
237 struct drm_i915_private *dev_priv = dev->dev_private;
240 /* Disable compression */
241 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
242 if (dpfc_ctl & DPFC_CTL_EN) {
243 dpfc_ctl &= ~DPFC_CTL_EN;
244 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
246 if (IS_IVYBRIDGE(dev))
247 /* WaFbcDisableDpfcClockGating:ivb */
248 I915_WRITE(ILK_DSPCLK_GATE_D,
249 I915_READ(ILK_DSPCLK_GATE_D) &
250 ~ILK_DPFCUNIT_CLOCK_GATE_DISABLE);
253 /* WaFbcDisableDpfcClockGating:hsw */
254 I915_WRITE(HSW_CLKGATE_DISABLE_PART_1,
255 I915_READ(HSW_CLKGATE_DISABLE_PART_1) &
256 ~HSW_DPFC_GATING_DISABLE);
258 DRM_DEBUG_KMS("disabled FBC\n");
262 static bool ironlake_fbc_enabled(struct drm_device *dev)
264 struct drm_i915_private *dev_priv = dev->dev_private;
266 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
269 static void gen7_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
271 struct drm_device *dev = crtc->dev;
272 struct drm_i915_private *dev_priv = dev->dev_private;
273 struct drm_framebuffer *fb = crtc->fb;
274 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
275 struct drm_i915_gem_object *obj = intel_fb->obj;
276 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
278 I915_WRITE(IVB_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj));
280 I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X |
281 IVB_DPFC_CTL_FENCE_EN |
282 intel_crtc->plane << IVB_DPFC_CTL_PLANE_SHIFT);
284 if (IS_IVYBRIDGE(dev)) {
285 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
286 I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
287 /* WaFbcDisableDpfcClockGating:ivb */
288 I915_WRITE(ILK_DSPCLK_GATE_D,
289 I915_READ(ILK_DSPCLK_GATE_D) |
290 ILK_DPFCUNIT_CLOCK_GATE_DISABLE);
292 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
293 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe),
294 HSW_BYPASS_FBC_QUEUE);
295 /* WaFbcDisableDpfcClockGating:hsw */
296 I915_WRITE(HSW_CLKGATE_DISABLE_PART_1,
297 I915_READ(HSW_CLKGATE_DISABLE_PART_1) |
298 HSW_DPFC_GATING_DISABLE);
301 I915_WRITE(SNB_DPFC_CTL_SA,
302 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
303 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
305 sandybridge_blit_fbc_update(dev);
307 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
310 bool intel_fbc_enabled(struct drm_device *dev)
312 struct drm_i915_private *dev_priv = dev->dev_private;
314 if (!dev_priv->display.fbc_enabled)
317 return dev_priv->display.fbc_enabled(dev);
320 static void intel_fbc_work_fn(struct work_struct *__work)
322 struct intel_fbc_work *work =
323 container_of(to_delayed_work(__work),
324 struct intel_fbc_work, work);
325 struct drm_device *dev = work->crtc->dev;
326 struct drm_i915_private *dev_priv = dev->dev_private;
328 mutex_lock(&dev->struct_mutex);
329 if (work == dev_priv->fbc.fbc_work) {
330 /* Double check that we haven't switched fb without cancelling
333 if (work->crtc->fb == work->fb) {
334 dev_priv->display.enable_fbc(work->crtc,
337 dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane;
338 dev_priv->fbc.fb_id = work->crtc->fb->base.id;
339 dev_priv->fbc.y = work->crtc->y;
342 dev_priv->fbc.fbc_work = NULL;
344 mutex_unlock(&dev->struct_mutex);
349 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
351 if (dev_priv->fbc.fbc_work == NULL)
354 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
356 /* Synchronisation is provided by struct_mutex and checking of
357 * dev_priv->fbc.fbc_work, so we can perform the cancellation
358 * entirely asynchronously.
360 if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work))
361 /* tasklet was killed before being run, clean up */
362 kfree(dev_priv->fbc.fbc_work);
364 /* Mark the work as no longer wanted so that if it does
365 * wake-up (because the work was already running and waiting
366 * for our mutex), it will discover that is no longer
369 dev_priv->fbc.fbc_work = NULL;
372 static void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
374 struct intel_fbc_work *work;
375 struct drm_device *dev = crtc->dev;
376 struct drm_i915_private *dev_priv = dev->dev_private;
378 if (!dev_priv->display.enable_fbc)
381 intel_cancel_fbc_work(dev_priv);
383 work = kzalloc(sizeof *work, GFP_KERNEL);
385 DRM_ERROR("Failed to allocate FBC work structure\n");
386 dev_priv->display.enable_fbc(crtc, interval);
392 work->interval = interval;
393 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
395 dev_priv->fbc.fbc_work = work;
397 /* Delay the actual enabling to let pageflipping cease and the
398 * display to settle before starting the compression. Note that
399 * this delay also serves a second purpose: it allows for a
400 * vblank to pass after disabling the FBC before we attempt
401 * to modify the control registers.
403 * A more complicated solution would involve tracking vblanks
404 * following the termination of the page-flipping sequence
405 * and indeed performing the enable as a co-routine and not
406 * waiting synchronously upon the vblank.
408 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
410 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
413 void intel_disable_fbc(struct drm_device *dev)
415 struct drm_i915_private *dev_priv = dev->dev_private;
417 intel_cancel_fbc_work(dev_priv);
419 if (!dev_priv->display.disable_fbc)
422 dev_priv->display.disable_fbc(dev);
423 dev_priv->fbc.plane = -1;
427 * intel_update_fbc - enable/disable FBC as needed
428 * @dev: the drm_device
430 * Set up the framebuffer compression hardware at mode set time. We
431 * enable it if possible:
432 * - plane A only (on pre-965)
433 * - no pixel mulitply/line duplication
434 * - no alpha buffer discard
436 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
438 * We can't assume that any compression will take place (worst case),
439 * so the compressed buffer has to be the same size as the uncompressed
440 * one. It also must reside (along with the line length buffer) in
443 * We need to enable/disable FBC on a global basis.
445 void intel_update_fbc(struct drm_device *dev)
447 struct drm_i915_private *dev_priv = dev->dev_private;
448 struct drm_crtc *crtc = NULL, *tmp_crtc;
449 struct intel_crtc *intel_crtc;
450 struct drm_framebuffer *fb;
451 struct intel_framebuffer *intel_fb;
452 struct drm_i915_gem_object *obj;
453 unsigned int max_hdisplay, max_vdisplay;
458 if (!I915_HAS_FBC(dev))
462 * If FBC is already on, we just have to verify that we can
463 * keep it that way...
464 * Need to disable if:
465 * - more than one pipe is active
466 * - changing FBC params (stride, fence, mode)
467 * - new fb is too large to fit in compressed buffer
468 * - going to an unsupported config (interlace, pixel multiply, etc.)
470 list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
471 if (intel_crtc_active(tmp_crtc) &&
472 !to_intel_crtc(tmp_crtc)->primary_disabled) {
474 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
475 dev_priv->fbc.no_fbc_reason =
483 if (!crtc || crtc->fb == NULL) {
484 DRM_DEBUG_KMS("no output, disabling\n");
485 dev_priv->fbc.no_fbc_reason = FBC_NO_OUTPUT;
489 intel_crtc = to_intel_crtc(crtc);
491 intel_fb = to_intel_framebuffer(fb);
494 if (i915_enable_fbc < 0 &&
495 INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) {
496 DRM_DEBUG_KMS("disabled per chip default\n");
497 dev_priv->fbc.no_fbc_reason = FBC_CHIP_DEFAULT;
500 if (!i915_enable_fbc) {
501 DRM_DEBUG_KMS("fbc disabled per module param\n");
502 dev_priv->fbc.no_fbc_reason = FBC_MODULE_PARAM;
505 if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) ||
506 (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) {
507 DRM_DEBUG_KMS("mode incompatible with compression, "
509 dev_priv->fbc.no_fbc_reason = FBC_UNSUPPORTED_MODE;
513 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
520 if ((crtc->mode.hdisplay > max_hdisplay) ||
521 (crtc->mode.vdisplay > max_vdisplay)) {
522 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
523 dev_priv->fbc.no_fbc_reason = FBC_MODE_TOO_LARGE;
526 if ((IS_I915GM(dev) || IS_I945GM(dev) || IS_HASWELL(dev)) &&
527 intel_crtc->plane != 0) {
528 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
529 dev_priv->fbc.no_fbc_reason = FBC_BAD_PLANE;
533 /* The use of a CPU fence is mandatory in order to detect writes
534 * by the CPU to the scanout and trigger updates to the FBC.
536 if (obj->tiling_mode != I915_TILING_X ||
537 obj->fence_reg == I915_FENCE_REG_NONE) {
538 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
539 dev_priv->fbc.no_fbc_reason = FBC_NOT_TILED;
543 /* If the kernel debugger is active, always disable compression */
547 if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) {
548 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
549 dev_priv->fbc.no_fbc_reason = FBC_STOLEN_TOO_SMALL;
553 /* If the scanout has not changed, don't modify the FBC settings.
554 * Note that we make the fundamental assumption that the fb->obj
555 * cannot be unpinned (and have its GTT offset and fence revoked)
556 * without first being decoupled from the scanout and FBC disabled.
558 if (dev_priv->fbc.plane == intel_crtc->plane &&
559 dev_priv->fbc.fb_id == fb->base.id &&
560 dev_priv->fbc.y == crtc->y)
563 if (intel_fbc_enabled(dev)) {
564 /* We update FBC along two paths, after changing fb/crtc
565 * configuration (modeswitching) and after page-flipping
566 * finishes. For the latter, we know that not only did
567 * we disable the FBC at the start of the page-flip
568 * sequence, but also more than one vblank has passed.
570 * For the former case of modeswitching, it is possible
571 * to switch between two FBC valid configurations
572 * instantaneously so we do need to disable the FBC
573 * before we can modify its control registers. We also
574 * have to wait for the next vblank for that to take
575 * effect. However, since we delay enabling FBC we can
576 * assume that a vblank has passed since disabling and
577 * that we can safely alter the registers in the deferred
580 * In the scenario that we go from a valid to invalid
581 * and then back to valid FBC configuration we have
582 * no strict enforcement that a vblank occurred since
583 * disabling the FBC. However, along all current pipe
584 * disabling paths we do need to wait for a vblank at
585 * some point. And we wait before enabling FBC anyway.
587 DRM_DEBUG_KMS("disabling active FBC for update\n");
588 intel_disable_fbc(dev);
591 intel_enable_fbc(crtc, 500);
595 /* Multiple disables should be harmless */
596 if (intel_fbc_enabled(dev)) {
597 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
598 intel_disable_fbc(dev);
600 i915_gem_stolen_cleanup_compression(dev);
603 static void i915_pineview_get_mem_freq(struct drm_device *dev)
605 drm_i915_private_t *dev_priv = dev->dev_private;
608 tmp = I915_READ(CLKCFG);
610 switch (tmp & CLKCFG_FSB_MASK) {
612 dev_priv->fsb_freq = 533; /* 133*4 */
615 dev_priv->fsb_freq = 800; /* 200*4 */
618 dev_priv->fsb_freq = 667; /* 167*4 */
621 dev_priv->fsb_freq = 400; /* 100*4 */
625 switch (tmp & CLKCFG_MEM_MASK) {
627 dev_priv->mem_freq = 533;
630 dev_priv->mem_freq = 667;
633 dev_priv->mem_freq = 800;
637 /* detect pineview DDR3 setting */
638 tmp = I915_READ(CSHRDDR3CTL);
639 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
642 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
644 drm_i915_private_t *dev_priv = dev->dev_private;
647 ddrpll = I915_READ16(DDRMPLL1);
648 csipll = I915_READ16(CSIPLL0);
650 switch (ddrpll & 0xff) {
652 dev_priv->mem_freq = 800;
655 dev_priv->mem_freq = 1066;
658 dev_priv->mem_freq = 1333;
661 dev_priv->mem_freq = 1600;
664 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
666 dev_priv->mem_freq = 0;
670 dev_priv->ips.r_t = dev_priv->mem_freq;
672 switch (csipll & 0x3ff) {
674 dev_priv->fsb_freq = 3200;
677 dev_priv->fsb_freq = 3733;
680 dev_priv->fsb_freq = 4266;
683 dev_priv->fsb_freq = 4800;
686 dev_priv->fsb_freq = 5333;
689 dev_priv->fsb_freq = 5866;
692 dev_priv->fsb_freq = 6400;
695 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
697 dev_priv->fsb_freq = 0;
701 if (dev_priv->fsb_freq == 3200) {
702 dev_priv->ips.c_m = 0;
703 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
704 dev_priv->ips.c_m = 1;
706 dev_priv->ips.c_m = 2;
710 static const struct cxsr_latency cxsr_latency_table[] = {
711 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
712 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
713 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
714 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
715 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
717 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
718 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
719 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
720 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
721 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
723 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
724 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
725 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
726 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
727 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
729 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
730 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
731 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
732 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
733 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
735 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
736 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
737 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
738 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
739 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
741 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
742 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
743 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
744 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
745 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
748 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
753 const struct cxsr_latency *latency;
756 if (fsb == 0 || mem == 0)
759 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
760 latency = &cxsr_latency_table[i];
761 if (is_desktop == latency->is_desktop &&
762 is_ddr3 == latency->is_ddr3 &&
763 fsb == latency->fsb_freq && mem == latency->mem_freq)
767 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
772 static void pineview_disable_cxsr(struct drm_device *dev)
774 struct drm_i915_private *dev_priv = dev->dev_private;
776 /* deactivate cxsr */
777 I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
781 * Latency for FIFO fetches is dependent on several factors:
782 * - memory configuration (speed, channels)
784 * - current MCH state
785 * It can be fairly high in some situations, so here we assume a fairly
786 * pessimal value. It's a tradeoff between extra memory fetches (if we
787 * set this value too high, the FIFO will fetch frequently to stay full)
788 * and power consumption (set it too low to save power and we might see
789 * FIFO underruns and display "flicker").
791 * A value of 5us seems to be a good balance; safe for very low end
792 * platforms but not overly aggressive on lower latency configs.
794 static const int latency_ns = 5000;
796 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
798 struct drm_i915_private *dev_priv = dev->dev_private;
799 uint32_t dsparb = I915_READ(DSPARB);
802 size = dsparb & 0x7f;
804 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
806 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
807 plane ? "B" : "A", size);
812 static int i85x_get_fifo_size(struct drm_device *dev, int plane)
814 struct drm_i915_private *dev_priv = dev->dev_private;
815 uint32_t dsparb = I915_READ(DSPARB);
818 size = dsparb & 0x1ff;
820 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
821 size >>= 1; /* Convert to cachelines */
823 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
824 plane ? "B" : "A", size);
829 static int i845_get_fifo_size(struct drm_device *dev, int plane)
831 struct drm_i915_private *dev_priv = dev->dev_private;
832 uint32_t dsparb = I915_READ(DSPARB);
835 size = dsparb & 0x7f;
836 size >>= 2; /* Convert to cachelines */
838 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
845 static int i830_get_fifo_size(struct drm_device *dev, int plane)
847 struct drm_i915_private *dev_priv = dev->dev_private;
848 uint32_t dsparb = I915_READ(DSPARB);
851 size = dsparb & 0x7f;
852 size >>= 1; /* Convert to cachelines */
854 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
855 plane ? "B" : "A", size);
860 /* Pineview has different values for various configs */
861 static const struct intel_watermark_params pineview_display_wm = {
862 PINEVIEW_DISPLAY_FIFO,
866 PINEVIEW_FIFO_LINE_SIZE
868 static const struct intel_watermark_params pineview_display_hplloff_wm = {
869 PINEVIEW_DISPLAY_FIFO,
871 PINEVIEW_DFT_HPLLOFF_WM,
873 PINEVIEW_FIFO_LINE_SIZE
875 static const struct intel_watermark_params pineview_cursor_wm = {
876 PINEVIEW_CURSOR_FIFO,
877 PINEVIEW_CURSOR_MAX_WM,
878 PINEVIEW_CURSOR_DFT_WM,
879 PINEVIEW_CURSOR_GUARD_WM,
880 PINEVIEW_FIFO_LINE_SIZE,
882 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
883 PINEVIEW_CURSOR_FIFO,
884 PINEVIEW_CURSOR_MAX_WM,
885 PINEVIEW_CURSOR_DFT_WM,
886 PINEVIEW_CURSOR_GUARD_WM,
887 PINEVIEW_FIFO_LINE_SIZE
889 static const struct intel_watermark_params g4x_wm_info = {
896 static const struct intel_watermark_params g4x_cursor_wm_info = {
903 static const struct intel_watermark_params valleyview_wm_info = {
904 VALLEYVIEW_FIFO_SIZE,
910 static const struct intel_watermark_params valleyview_cursor_wm_info = {
912 VALLEYVIEW_CURSOR_MAX_WM,
917 static const struct intel_watermark_params i965_cursor_wm_info = {
924 static const struct intel_watermark_params i945_wm_info = {
931 static const struct intel_watermark_params i915_wm_info = {
938 static const struct intel_watermark_params i855_wm_info = {
945 static const struct intel_watermark_params i830_wm_info = {
953 static const struct intel_watermark_params ironlake_display_wm_info = {
960 static const struct intel_watermark_params ironlake_cursor_wm_info = {
967 static const struct intel_watermark_params ironlake_display_srwm_info = {
969 ILK_DISPLAY_MAX_SRWM,
970 ILK_DISPLAY_DFT_SRWM,
974 static const struct intel_watermark_params ironlake_cursor_srwm_info = {
982 static const struct intel_watermark_params sandybridge_display_wm_info = {
989 static const struct intel_watermark_params sandybridge_cursor_wm_info = {
996 static const struct intel_watermark_params sandybridge_display_srwm_info = {
998 SNB_DISPLAY_MAX_SRWM,
999 SNB_DISPLAY_DFT_SRWM,
1003 static const struct intel_watermark_params sandybridge_cursor_srwm_info = {
1005 SNB_CURSOR_MAX_SRWM,
1006 SNB_CURSOR_DFT_SRWM,
1013 * intel_calculate_wm - calculate watermark level
1014 * @clock_in_khz: pixel clock
1015 * @wm: chip FIFO params
1016 * @pixel_size: display pixel size
1017 * @latency_ns: memory latency for the platform
1019 * Calculate the watermark level (the level at which the display plane will
1020 * start fetching from memory again). Each chip has a different display
1021 * FIFO size and allocation, so the caller needs to figure that out and pass
1022 * in the correct intel_watermark_params structure.
1024 * As the pixel clock runs, the FIFO will be drained at a rate that depends
1025 * on the pixel size. When it reaches the watermark level, it'll start
1026 * fetching FIFO line sized based chunks from memory until the FIFO fills
1027 * past the watermark point. If the FIFO drains completely, a FIFO underrun
1028 * will occur, and a display engine hang could result.
1030 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
1031 const struct intel_watermark_params *wm,
1034 unsigned long latency_ns)
1036 long entries_required, wm_size;
1039 * Note: we need to make sure we don't overflow for various clock &
1041 * clocks go from a few thousand to several hundred thousand.
1042 * latency is usually a few thousand
1044 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
1046 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
1048 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
1050 wm_size = fifo_size - (entries_required + wm->guard_size);
1052 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
1054 /* Don't promote wm_size to unsigned... */
1055 if (wm_size > (long)wm->max_wm)
1056 wm_size = wm->max_wm;
1058 wm_size = wm->default_wm;
1062 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
1064 struct drm_crtc *crtc, *enabled = NULL;
1066 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1067 if (intel_crtc_active(crtc)) {
1077 static void pineview_update_wm(struct drm_device *dev)
1079 struct drm_i915_private *dev_priv = dev->dev_private;
1080 struct drm_crtc *crtc;
1081 const struct cxsr_latency *latency;
1085 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
1086 dev_priv->fsb_freq, dev_priv->mem_freq);
1088 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1089 pineview_disable_cxsr(dev);
1093 crtc = single_enabled_crtc(dev);
1095 int clock = crtc->mode.clock;
1096 int pixel_size = crtc->fb->bits_per_pixel / 8;
1099 wm = intel_calculate_wm(clock, &pineview_display_wm,
1100 pineview_display_wm.fifo_size,
1101 pixel_size, latency->display_sr);
1102 reg = I915_READ(DSPFW1);
1103 reg &= ~DSPFW_SR_MASK;
1104 reg |= wm << DSPFW_SR_SHIFT;
1105 I915_WRITE(DSPFW1, reg);
1106 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
1109 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
1110 pineview_display_wm.fifo_size,
1111 pixel_size, latency->cursor_sr);
1112 reg = I915_READ(DSPFW3);
1113 reg &= ~DSPFW_CURSOR_SR_MASK;
1114 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
1115 I915_WRITE(DSPFW3, reg);
1117 /* Display HPLL off SR */
1118 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
1119 pineview_display_hplloff_wm.fifo_size,
1120 pixel_size, latency->display_hpll_disable);
1121 reg = I915_READ(DSPFW3);
1122 reg &= ~DSPFW_HPLL_SR_MASK;
1123 reg |= wm & DSPFW_HPLL_SR_MASK;
1124 I915_WRITE(DSPFW3, reg);
1126 /* cursor HPLL off SR */
1127 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
1128 pineview_display_hplloff_wm.fifo_size,
1129 pixel_size, latency->cursor_hpll_disable);
1130 reg = I915_READ(DSPFW3);
1131 reg &= ~DSPFW_HPLL_CURSOR_MASK;
1132 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
1133 I915_WRITE(DSPFW3, reg);
1134 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
1138 I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
1139 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1141 pineview_disable_cxsr(dev);
1142 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1146 static bool g4x_compute_wm0(struct drm_device *dev,
1148 const struct intel_watermark_params *display,
1149 int display_latency_ns,
1150 const struct intel_watermark_params *cursor,
1151 int cursor_latency_ns,
1155 struct drm_crtc *crtc;
1156 int htotal, hdisplay, clock, pixel_size;
1157 int line_time_us, line_count;
1158 int entries, tlb_miss;
1160 crtc = intel_get_crtc_for_plane(dev, plane);
1161 if (!intel_crtc_active(crtc)) {
1162 *cursor_wm = cursor->guard_size;
1163 *plane_wm = display->guard_size;
1167 htotal = crtc->mode.htotal;
1168 hdisplay = crtc->mode.hdisplay;
1169 clock = crtc->mode.clock;
1170 pixel_size = crtc->fb->bits_per_pixel / 8;
1172 /* Use the small buffer method to calculate plane watermark */
1173 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1174 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
1176 entries += tlb_miss;
1177 entries = DIV_ROUND_UP(entries, display->cacheline_size);
1178 *plane_wm = entries + display->guard_size;
1179 if (*plane_wm > (int)display->max_wm)
1180 *plane_wm = display->max_wm;
1182 /* Use the large buffer method to calculate cursor watermark */
1183 line_time_us = ((htotal * 1000) / clock);
1184 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
1185 entries = line_count * 64 * pixel_size;
1186 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
1188 entries += tlb_miss;
1189 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1190 *cursor_wm = entries + cursor->guard_size;
1191 if (*cursor_wm > (int)cursor->max_wm)
1192 *cursor_wm = (int)cursor->max_wm;
1198 * Check the wm result.
1200 * If any calculated watermark values is larger than the maximum value that
1201 * can be programmed into the associated watermark register, that watermark
1204 static bool g4x_check_srwm(struct drm_device *dev,
1205 int display_wm, int cursor_wm,
1206 const struct intel_watermark_params *display,
1207 const struct intel_watermark_params *cursor)
1209 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1210 display_wm, cursor_wm);
1212 if (display_wm > display->max_wm) {
1213 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1214 display_wm, display->max_wm);
1218 if (cursor_wm > cursor->max_wm) {
1219 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1220 cursor_wm, cursor->max_wm);
1224 if (!(display_wm || cursor_wm)) {
1225 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1232 static bool g4x_compute_srwm(struct drm_device *dev,
1235 const struct intel_watermark_params *display,
1236 const struct intel_watermark_params *cursor,
1237 int *display_wm, int *cursor_wm)
1239 struct drm_crtc *crtc;
1240 int hdisplay, htotal, pixel_size, clock;
1241 unsigned long line_time_us;
1242 int line_count, line_size;
1247 *display_wm = *cursor_wm = 0;
1251 crtc = intel_get_crtc_for_plane(dev, plane);
1252 hdisplay = crtc->mode.hdisplay;
1253 htotal = crtc->mode.htotal;
1254 clock = crtc->mode.clock;
1255 pixel_size = crtc->fb->bits_per_pixel / 8;
1257 line_time_us = (htotal * 1000) / clock;
1258 line_count = (latency_ns / line_time_us + 1000) / 1000;
1259 line_size = hdisplay * pixel_size;
1261 /* Use the minimum of the small and large buffer method for primary */
1262 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1263 large = line_count * line_size;
1265 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1266 *display_wm = entries + display->guard_size;
1268 /* calculate the self-refresh watermark for display cursor */
1269 entries = line_count * pixel_size * 64;
1270 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1271 *cursor_wm = entries + cursor->guard_size;
1273 return g4x_check_srwm(dev,
1274 *display_wm, *cursor_wm,
1278 static bool vlv_compute_drain_latency(struct drm_device *dev,
1280 int *plane_prec_mult,
1282 int *cursor_prec_mult,
1285 struct drm_crtc *crtc;
1286 int clock, pixel_size;
1289 crtc = intel_get_crtc_for_plane(dev, plane);
1290 if (!intel_crtc_active(crtc))
1293 clock = crtc->mode.clock; /* VESA DOT Clock */
1294 pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */
1296 entries = (clock / 1000) * pixel_size;
1297 *plane_prec_mult = (entries > 256) ?
1298 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1299 *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) *
1302 entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */
1303 *cursor_prec_mult = (entries > 256) ?
1304 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1305 *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4);
1311 * Update drain latency registers of memory arbiter
1313 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1314 * to be programmed. Each plane has a drain latency multiplier and a drain
1318 static void vlv_update_drain_latency(struct drm_device *dev)
1320 struct drm_i915_private *dev_priv = dev->dev_private;
1321 int planea_prec, planea_dl, planeb_prec, planeb_dl;
1322 int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl;
1323 int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is
1326 /* For plane A, Cursor A */
1327 if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl,
1328 &cursor_prec_mult, &cursora_dl)) {
1329 cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1330 DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16;
1331 planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1332 DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16;
1334 I915_WRITE(VLV_DDL1, cursora_prec |
1335 (cursora_dl << DDL_CURSORA_SHIFT) |
1336 planea_prec | planea_dl);
1339 /* For plane B, Cursor B */
1340 if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl,
1341 &cursor_prec_mult, &cursorb_dl)) {
1342 cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1343 DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16;
1344 planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1345 DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16;
1347 I915_WRITE(VLV_DDL2, cursorb_prec |
1348 (cursorb_dl << DDL_CURSORB_SHIFT) |
1349 planeb_prec | planeb_dl);
1353 #define single_plane_enabled(mask) is_power_of_2(mask)
1355 static void valleyview_update_wm(struct drm_device *dev)
1357 static const int sr_latency_ns = 12000;
1358 struct drm_i915_private *dev_priv = dev->dev_private;
1359 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1360 int plane_sr, cursor_sr;
1361 int ignore_plane_sr, ignore_cursor_sr;
1362 unsigned int enabled = 0;
1364 vlv_update_drain_latency(dev);
1366 if (g4x_compute_wm0(dev, PIPE_A,
1367 &valleyview_wm_info, latency_ns,
1368 &valleyview_cursor_wm_info, latency_ns,
1369 &planea_wm, &cursora_wm))
1370 enabled |= 1 << PIPE_A;
1372 if (g4x_compute_wm0(dev, PIPE_B,
1373 &valleyview_wm_info, latency_ns,
1374 &valleyview_cursor_wm_info, latency_ns,
1375 &planeb_wm, &cursorb_wm))
1376 enabled |= 1 << PIPE_B;
1378 if (single_plane_enabled(enabled) &&
1379 g4x_compute_srwm(dev, ffs(enabled) - 1,
1381 &valleyview_wm_info,
1382 &valleyview_cursor_wm_info,
1383 &plane_sr, &ignore_cursor_sr) &&
1384 g4x_compute_srwm(dev, ffs(enabled) - 1,
1386 &valleyview_wm_info,
1387 &valleyview_cursor_wm_info,
1388 &ignore_plane_sr, &cursor_sr)) {
1389 I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN);
1391 I915_WRITE(FW_BLC_SELF_VLV,
1392 I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN);
1393 plane_sr = cursor_sr = 0;
1396 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1397 planea_wm, cursora_wm,
1398 planeb_wm, cursorb_wm,
1399 plane_sr, cursor_sr);
1402 (plane_sr << DSPFW_SR_SHIFT) |
1403 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1404 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1407 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1408 (cursora_wm << DSPFW_CURSORA_SHIFT));
1410 (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) |
1411 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1414 static void g4x_update_wm(struct drm_device *dev)
1416 static const int sr_latency_ns = 12000;
1417 struct drm_i915_private *dev_priv = dev->dev_private;
1418 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1419 int plane_sr, cursor_sr;
1420 unsigned int enabled = 0;
1422 if (g4x_compute_wm0(dev, PIPE_A,
1423 &g4x_wm_info, latency_ns,
1424 &g4x_cursor_wm_info, latency_ns,
1425 &planea_wm, &cursora_wm))
1426 enabled |= 1 << PIPE_A;
1428 if (g4x_compute_wm0(dev, PIPE_B,
1429 &g4x_wm_info, latency_ns,
1430 &g4x_cursor_wm_info, latency_ns,
1431 &planeb_wm, &cursorb_wm))
1432 enabled |= 1 << PIPE_B;
1434 if (single_plane_enabled(enabled) &&
1435 g4x_compute_srwm(dev, ffs(enabled) - 1,
1438 &g4x_cursor_wm_info,
1439 &plane_sr, &cursor_sr)) {
1440 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1442 I915_WRITE(FW_BLC_SELF,
1443 I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN);
1444 plane_sr = cursor_sr = 0;
1447 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1448 planea_wm, cursora_wm,
1449 planeb_wm, cursorb_wm,
1450 plane_sr, cursor_sr);
1453 (plane_sr << DSPFW_SR_SHIFT) |
1454 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1455 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1458 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1459 (cursora_wm << DSPFW_CURSORA_SHIFT));
1460 /* HPLL off in SR has some issues on G4x... disable it */
1462 (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) |
1463 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1466 static void i965_update_wm(struct drm_device *dev)
1468 struct drm_i915_private *dev_priv = dev->dev_private;
1469 struct drm_crtc *crtc;
1473 /* Calc sr entries for one plane configs */
1474 crtc = single_enabled_crtc(dev);
1476 /* self-refresh has much higher latency */
1477 static const int sr_latency_ns = 12000;
1478 int clock = crtc->mode.clock;
1479 int htotal = crtc->mode.htotal;
1480 int hdisplay = crtc->mode.hdisplay;
1481 int pixel_size = crtc->fb->bits_per_pixel / 8;
1482 unsigned long line_time_us;
1485 line_time_us = ((htotal * 1000) / clock);
1487 /* Use ns/us then divide to preserve precision */
1488 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1489 pixel_size * hdisplay;
1490 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
1491 srwm = I965_FIFO_SIZE - entries;
1495 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1498 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1500 entries = DIV_ROUND_UP(entries,
1501 i965_cursor_wm_info.cacheline_size);
1502 cursor_sr = i965_cursor_wm_info.fifo_size -
1503 (entries + i965_cursor_wm_info.guard_size);
1505 if (cursor_sr > i965_cursor_wm_info.max_wm)
1506 cursor_sr = i965_cursor_wm_info.max_wm;
1508 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1509 "cursor %d\n", srwm, cursor_sr);
1511 if (IS_CRESTLINE(dev))
1512 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1514 /* Turn off self refresh if both pipes are enabled */
1515 if (IS_CRESTLINE(dev))
1516 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
1520 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1523 /* 965 has limitations... */
1524 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
1525 (8 << 16) | (8 << 8) | (8 << 0));
1526 I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
1527 /* update cursor SR watermark */
1528 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1531 static void i9xx_update_wm(struct drm_device *dev)
1533 struct drm_i915_private *dev_priv = dev->dev_private;
1534 const struct intel_watermark_params *wm_info;
1539 int planea_wm, planeb_wm;
1540 struct drm_crtc *crtc, *enabled = NULL;
1543 wm_info = &i945_wm_info;
1544 else if (!IS_GEN2(dev))
1545 wm_info = &i915_wm_info;
1547 wm_info = &i855_wm_info;
1549 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
1550 crtc = intel_get_crtc_for_plane(dev, 0);
1551 if (intel_crtc_active(crtc)) {
1552 int cpp = crtc->fb->bits_per_pixel / 8;
1556 planea_wm = intel_calculate_wm(crtc->mode.clock,
1557 wm_info, fifo_size, cpp,
1561 planea_wm = fifo_size - wm_info->guard_size;
1563 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
1564 crtc = intel_get_crtc_for_plane(dev, 1);
1565 if (intel_crtc_active(crtc)) {
1566 int cpp = crtc->fb->bits_per_pixel / 8;
1570 planeb_wm = intel_calculate_wm(crtc->mode.clock,
1571 wm_info, fifo_size, cpp,
1573 if (enabled == NULL)
1578 planeb_wm = fifo_size - wm_info->guard_size;
1580 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1583 * Overlay gets an aggressive default since video jitter is bad.
1587 /* Play safe and disable self-refresh before adjusting watermarks. */
1588 if (IS_I945G(dev) || IS_I945GM(dev))
1589 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0);
1590 else if (IS_I915GM(dev))
1591 I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
1593 /* Calc sr entries for one plane configs */
1594 if (HAS_FW_BLC(dev) && enabled) {
1595 /* self-refresh has much higher latency */
1596 static const int sr_latency_ns = 6000;
1597 int clock = enabled->mode.clock;
1598 int htotal = enabled->mode.htotal;
1599 int hdisplay = enabled->mode.hdisplay;
1600 int pixel_size = enabled->fb->bits_per_pixel / 8;
1601 unsigned long line_time_us;
1604 line_time_us = (htotal * 1000) / clock;
1606 /* Use ns/us then divide to preserve precision */
1607 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1608 pixel_size * hdisplay;
1609 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
1610 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1611 srwm = wm_info->fifo_size - entries;
1615 if (IS_I945G(dev) || IS_I945GM(dev))
1616 I915_WRITE(FW_BLC_SELF,
1617 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1618 else if (IS_I915GM(dev))
1619 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1622 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1623 planea_wm, planeb_wm, cwm, srwm);
1625 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1626 fwater_hi = (cwm & 0x1f);
1628 /* Set request length to 8 cachelines per fetch */
1629 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1630 fwater_hi = fwater_hi | (1 << 8);
1632 I915_WRITE(FW_BLC, fwater_lo);
1633 I915_WRITE(FW_BLC2, fwater_hi);
1635 if (HAS_FW_BLC(dev)) {
1637 if (IS_I945G(dev) || IS_I945GM(dev))
1638 I915_WRITE(FW_BLC_SELF,
1639 FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
1640 else if (IS_I915GM(dev))
1641 I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
1642 DRM_DEBUG_KMS("memory self refresh enabled\n");
1644 DRM_DEBUG_KMS("memory self refresh disabled\n");
1648 static void i830_update_wm(struct drm_device *dev)
1650 struct drm_i915_private *dev_priv = dev->dev_private;
1651 struct drm_crtc *crtc;
1655 crtc = single_enabled_crtc(dev);
1659 planea_wm = intel_calculate_wm(crtc->mode.clock, &i830_wm_info,
1660 dev_priv->display.get_fifo_size(dev, 0),
1662 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1663 fwater_lo |= (3<<8) | planea_wm;
1665 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1667 I915_WRITE(FW_BLC, fwater_lo);
1670 #define ILK_LP0_PLANE_LATENCY 700
1671 #define ILK_LP0_CURSOR_LATENCY 1300
1674 * Check the wm result.
1676 * If any calculated watermark values is larger than the maximum value that
1677 * can be programmed into the associated watermark register, that watermark
1680 static bool ironlake_check_srwm(struct drm_device *dev, int level,
1681 int fbc_wm, int display_wm, int cursor_wm,
1682 const struct intel_watermark_params *display,
1683 const struct intel_watermark_params *cursor)
1685 struct drm_i915_private *dev_priv = dev->dev_private;
1687 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1688 " cursor %d\n", level, display_wm, fbc_wm, cursor_wm);
1690 if (fbc_wm > SNB_FBC_MAX_SRWM) {
1691 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1692 fbc_wm, SNB_FBC_MAX_SRWM, level);
1694 /* fbc has it's own way to disable FBC WM */
1695 I915_WRITE(DISP_ARB_CTL,
1696 I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS);
1698 } else if (INTEL_INFO(dev)->gen >= 6) {
1699 /* enable FBC WM (except on ILK, where it must remain off) */
1700 I915_WRITE(DISP_ARB_CTL,
1701 I915_READ(DISP_ARB_CTL) & ~DISP_FBC_WM_DIS);
1704 if (display_wm > display->max_wm) {
1705 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1706 display_wm, SNB_DISPLAY_MAX_SRWM, level);
1710 if (cursor_wm > cursor->max_wm) {
1711 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1712 cursor_wm, SNB_CURSOR_MAX_SRWM, level);
1716 if (!(fbc_wm || display_wm || cursor_wm)) {
1717 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level);
1725 * Compute watermark values of WM[1-3],
1727 static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane,
1729 const struct intel_watermark_params *display,
1730 const struct intel_watermark_params *cursor,
1731 int *fbc_wm, int *display_wm, int *cursor_wm)
1733 struct drm_crtc *crtc;
1734 unsigned long line_time_us;
1735 int hdisplay, htotal, pixel_size, clock;
1736 int line_count, line_size;
1741 *fbc_wm = *display_wm = *cursor_wm = 0;
1745 crtc = intel_get_crtc_for_plane(dev, plane);
1746 hdisplay = crtc->mode.hdisplay;
1747 htotal = crtc->mode.htotal;
1748 clock = crtc->mode.clock;
1749 pixel_size = crtc->fb->bits_per_pixel / 8;
1751 line_time_us = (htotal * 1000) / clock;
1752 line_count = (latency_ns / line_time_us + 1000) / 1000;
1753 line_size = hdisplay * pixel_size;
1755 /* Use the minimum of the small and large buffer method for primary */
1756 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1757 large = line_count * line_size;
1759 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1760 *display_wm = entries + display->guard_size;
1764 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1766 *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2;
1768 /* calculate the self-refresh watermark for display cursor */
1769 entries = line_count * pixel_size * 64;
1770 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1771 *cursor_wm = entries + cursor->guard_size;
1773 return ironlake_check_srwm(dev, level,
1774 *fbc_wm, *display_wm, *cursor_wm,
1778 static void ironlake_update_wm(struct drm_device *dev)
1780 struct drm_i915_private *dev_priv = dev->dev_private;
1781 int fbc_wm, plane_wm, cursor_wm;
1782 unsigned int enabled;
1785 if (g4x_compute_wm0(dev, PIPE_A,
1786 &ironlake_display_wm_info,
1787 ILK_LP0_PLANE_LATENCY,
1788 &ironlake_cursor_wm_info,
1789 ILK_LP0_CURSOR_LATENCY,
1790 &plane_wm, &cursor_wm)) {
1791 I915_WRITE(WM0_PIPEA_ILK,
1792 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
1793 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1794 " plane %d, " "cursor: %d\n",
1795 plane_wm, cursor_wm);
1796 enabled |= 1 << PIPE_A;
1799 if (g4x_compute_wm0(dev, PIPE_B,
1800 &ironlake_display_wm_info,
1801 ILK_LP0_PLANE_LATENCY,
1802 &ironlake_cursor_wm_info,
1803 ILK_LP0_CURSOR_LATENCY,
1804 &plane_wm, &cursor_wm)) {
1805 I915_WRITE(WM0_PIPEB_ILK,
1806 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
1807 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1808 " plane %d, cursor: %d\n",
1809 plane_wm, cursor_wm);
1810 enabled |= 1 << PIPE_B;
1814 * Calculate and update the self-refresh watermark only when one
1815 * display plane is used.
1817 I915_WRITE(WM3_LP_ILK, 0);
1818 I915_WRITE(WM2_LP_ILK, 0);
1819 I915_WRITE(WM1_LP_ILK, 0);
1821 if (!single_plane_enabled(enabled))
1823 enabled = ffs(enabled) - 1;
1826 if (!ironlake_compute_srwm(dev, 1, enabled,
1827 ILK_READ_WM1_LATENCY() * 500,
1828 &ironlake_display_srwm_info,
1829 &ironlake_cursor_srwm_info,
1830 &fbc_wm, &plane_wm, &cursor_wm))
1833 I915_WRITE(WM1_LP_ILK,
1835 (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1836 (fbc_wm << WM1_LP_FBC_SHIFT) |
1837 (plane_wm << WM1_LP_SR_SHIFT) |
1841 if (!ironlake_compute_srwm(dev, 2, enabled,
1842 ILK_READ_WM2_LATENCY() * 500,
1843 &ironlake_display_srwm_info,
1844 &ironlake_cursor_srwm_info,
1845 &fbc_wm, &plane_wm, &cursor_wm))
1848 I915_WRITE(WM2_LP_ILK,
1850 (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1851 (fbc_wm << WM1_LP_FBC_SHIFT) |
1852 (plane_wm << WM1_LP_SR_SHIFT) |
1856 * WM3 is unsupported on ILK, probably because we don't have latency
1857 * data for that power state
1861 static void sandybridge_update_wm(struct drm_device *dev)
1863 struct drm_i915_private *dev_priv = dev->dev_private;
1864 int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
1866 int fbc_wm, plane_wm, cursor_wm;
1867 unsigned int enabled;
1870 if (g4x_compute_wm0(dev, PIPE_A,
1871 &sandybridge_display_wm_info, latency,
1872 &sandybridge_cursor_wm_info, latency,
1873 &plane_wm, &cursor_wm)) {
1874 val = I915_READ(WM0_PIPEA_ILK);
1875 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1876 I915_WRITE(WM0_PIPEA_ILK, val |
1877 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1878 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1879 " plane %d, " "cursor: %d\n",
1880 plane_wm, cursor_wm);
1881 enabled |= 1 << PIPE_A;
1884 if (g4x_compute_wm0(dev, PIPE_B,
1885 &sandybridge_display_wm_info, latency,
1886 &sandybridge_cursor_wm_info, latency,
1887 &plane_wm, &cursor_wm)) {
1888 val = I915_READ(WM0_PIPEB_ILK);
1889 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1890 I915_WRITE(WM0_PIPEB_ILK, val |
1891 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1892 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1893 " plane %d, cursor: %d\n",
1894 plane_wm, cursor_wm);
1895 enabled |= 1 << PIPE_B;
1899 * Calculate and update the self-refresh watermark only when one
1900 * display plane is used.
1902 * SNB support 3 levels of watermark.
1904 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1905 * and disabled in the descending order
1908 I915_WRITE(WM3_LP_ILK, 0);
1909 I915_WRITE(WM2_LP_ILK, 0);
1910 I915_WRITE(WM1_LP_ILK, 0);
1912 if (!single_plane_enabled(enabled) ||
1913 dev_priv->sprite_scaling_enabled)
1915 enabled = ffs(enabled) - 1;
1918 if (!ironlake_compute_srwm(dev, 1, enabled,
1919 SNB_READ_WM1_LATENCY() * 500,
1920 &sandybridge_display_srwm_info,
1921 &sandybridge_cursor_srwm_info,
1922 &fbc_wm, &plane_wm, &cursor_wm))
1925 I915_WRITE(WM1_LP_ILK,
1927 (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1928 (fbc_wm << WM1_LP_FBC_SHIFT) |
1929 (plane_wm << WM1_LP_SR_SHIFT) |
1933 if (!ironlake_compute_srwm(dev, 2, enabled,
1934 SNB_READ_WM2_LATENCY() * 500,
1935 &sandybridge_display_srwm_info,
1936 &sandybridge_cursor_srwm_info,
1937 &fbc_wm, &plane_wm, &cursor_wm))
1940 I915_WRITE(WM2_LP_ILK,
1942 (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1943 (fbc_wm << WM1_LP_FBC_SHIFT) |
1944 (plane_wm << WM1_LP_SR_SHIFT) |
1948 if (!ironlake_compute_srwm(dev, 3, enabled,
1949 SNB_READ_WM3_LATENCY() * 500,
1950 &sandybridge_display_srwm_info,
1951 &sandybridge_cursor_srwm_info,
1952 &fbc_wm, &plane_wm, &cursor_wm))
1955 I915_WRITE(WM3_LP_ILK,
1957 (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1958 (fbc_wm << WM1_LP_FBC_SHIFT) |
1959 (plane_wm << WM1_LP_SR_SHIFT) |
1963 static void ivybridge_update_wm(struct drm_device *dev)
1965 struct drm_i915_private *dev_priv = dev->dev_private;
1966 int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
1968 int fbc_wm, plane_wm, cursor_wm;
1969 int ignore_fbc_wm, ignore_plane_wm, ignore_cursor_wm;
1970 unsigned int enabled;
1973 if (g4x_compute_wm0(dev, PIPE_A,
1974 &sandybridge_display_wm_info, latency,
1975 &sandybridge_cursor_wm_info, latency,
1976 &plane_wm, &cursor_wm)) {
1977 val = I915_READ(WM0_PIPEA_ILK);
1978 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1979 I915_WRITE(WM0_PIPEA_ILK, val |
1980 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1981 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1982 " plane %d, " "cursor: %d\n",
1983 plane_wm, cursor_wm);
1984 enabled |= 1 << PIPE_A;
1987 if (g4x_compute_wm0(dev, PIPE_B,
1988 &sandybridge_display_wm_info, latency,
1989 &sandybridge_cursor_wm_info, latency,
1990 &plane_wm, &cursor_wm)) {
1991 val = I915_READ(WM0_PIPEB_ILK);
1992 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1993 I915_WRITE(WM0_PIPEB_ILK, val |
1994 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1995 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1996 " plane %d, cursor: %d\n",
1997 plane_wm, cursor_wm);
1998 enabled |= 1 << PIPE_B;
2001 if (g4x_compute_wm0(dev, PIPE_C,
2002 &sandybridge_display_wm_info, latency,
2003 &sandybridge_cursor_wm_info, latency,
2004 &plane_wm, &cursor_wm)) {
2005 val = I915_READ(WM0_PIPEC_IVB);
2006 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
2007 I915_WRITE(WM0_PIPEC_IVB, val |
2008 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
2009 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
2010 " plane %d, cursor: %d\n",
2011 plane_wm, cursor_wm);
2012 enabled |= 1 << PIPE_C;
2016 * Calculate and update the self-refresh watermark only when one
2017 * display plane is used.
2019 * SNB support 3 levels of watermark.
2021 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
2022 * and disabled in the descending order
2025 I915_WRITE(WM3_LP_ILK, 0);
2026 I915_WRITE(WM2_LP_ILK, 0);
2027 I915_WRITE(WM1_LP_ILK, 0);
2029 if (!single_plane_enabled(enabled) ||
2030 dev_priv->sprite_scaling_enabled)
2032 enabled = ffs(enabled) - 1;
2035 if (!ironlake_compute_srwm(dev, 1, enabled,
2036 SNB_READ_WM1_LATENCY() * 500,
2037 &sandybridge_display_srwm_info,
2038 &sandybridge_cursor_srwm_info,
2039 &fbc_wm, &plane_wm, &cursor_wm))
2042 I915_WRITE(WM1_LP_ILK,
2044 (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
2045 (fbc_wm << WM1_LP_FBC_SHIFT) |
2046 (plane_wm << WM1_LP_SR_SHIFT) |
2050 if (!ironlake_compute_srwm(dev, 2, enabled,
2051 SNB_READ_WM2_LATENCY() * 500,
2052 &sandybridge_display_srwm_info,
2053 &sandybridge_cursor_srwm_info,
2054 &fbc_wm, &plane_wm, &cursor_wm))
2057 I915_WRITE(WM2_LP_ILK,
2059 (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
2060 (fbc_wm << WM1_LP_FBC_SHIFT) |
2061 (plane_wm << WM1_LP_SR_SHIFT) |
2064 /* WM3, note we have to correct the cursor latency */
2065 if (!ironlake_compute_srwm(dev, 3, enabled,
2066 SNB_READ_WM3_LATENCY() * 500,
2067 &sandybridge_display_srwm_info,
2068 &sandybridge_cursor_srwm_info,
2069 &fbc_wm, &plane_wm, &ignore_cursor_wm) ||
2070 !ironlake_compute_srwm(dev, 3, enabled,
2071 2 * SNB_READ_WM3_LATENCY() * 500,
2072 &sandybridge_display_srwm_info,
2073 &sandybridge_cursor_srwm_info,
2074 &ignore_fbc_wm, &ignore_plane_wm, &cursor_wm))
2077 I915_WRITE(WM3_LP_ILK,
2079 (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
2080 (fbc_wm << WM1_LP_FBC_SHIFT) |
2081 (plane_wm << WM1_LP_SR_SHIFT) |
2085 static uint32_t hsw_wm_get_pixel_rate(struct drm_device *dev,
2086 struct drm_crtc *crtc)
2088 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2089 uint32_t pixel_rate, pfit_size;
2091 pixel_rate = intel_crtc->config.adjusted_mode.clock;
2093 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
2094 * adjust the pixel_rate here. */
2096 pfit_size = intel_crtc->config.pch_pfit.size;
2098 uint64_t pipe_w, pipe_h, pfit_w, pfit_h;
2100 pipe_w = intel_crtc->config.requested_mode.hdisplay;
2101 pipe_h = intel_crtc->config.requested_mode.vdisplay;
2102 pfit_w = (pfit_size >> 16) & 0xFFFF;
2103 pfit_h = pfit_size & 0xFFFF;
2104 if (pipe_w < pfit_w)
2106 if (pipe_h < pfit_h)
2109 pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h,
2116 static uint32_t hsw_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
2121 ret = (uint64_t) pixel_rate * bytes_per_pixel * latency;
2122 ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
2127 static uint32_t hsw_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
2128 uint32_t horiz_pixels, uint8_t bytes_per_pixel,
2133 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
2134 ret = (ret + 1) * horiz_pixels * bytes_per_pixel;
2135 ret = DIV_ROUND_UP(ret, 64) + 2;
2139 static uint32_t hsw_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels,
2140 uint8_t bytes_per_pixel)
2142 return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2;
2145 struct hsw_pipe_wm_parameters {
2147 bool sprite_enabled;
2148 uint8_t pri_bytes_per_pixel;
2149 uint8_t spr_bytes_per_pixel;
2150 uint8_t cur_bytes_per_pixel;
2151 uint32_t pri_horiz_pixels;
2152 uint32_t spr_horiz_pixels;
2153 uint32_t cur_horiz_pixels;
2154 uint32_t pipe_htotal;
2155 uint32_t pixel_rate;
2158 struct hsw_wm_maximums {
2165 struct hsw_lp_wm_result {
2174 struct hsw_wm_values {
2175 uint32_t wm_pipe[3];
2177 uint32_t wm_lp_spr[3];
2178 uint32_t wm_linetime[3];
2182 enum hsw_data_buf_partitioning {
2183 HSW_DATA_BUF_PART_1_2,
2184 HSW_DATA_BUF_PART_5_6,
2187 /* For both WM_PIPE and WM_LP. */
2188 static uint32_t hsw_compute_pri_wm(struct hsw_pipe_wm_parameters *params,
2192 uint32_t method1, method2;
2194 /* TODO: for now, assume the primary plane is always enabled. */
2195 if (!params->active)
2198 method1 = hsw_wm_method1(params->pixel_rate,
2199 params->pri_bytes_per_pixel,
2205 method2 = hsw_wm_method2(params->pixel_rate,
2206 params->pipe_htotal,
2207 params->pri_horiz_pixels,
2208 params->pri_bytes_per_pixel,
2211 return min(method1, method2);
2214 /* For both WM_PIPE and WM_LP. */
2215 static uint32_t hsw_compute_spr_wm(struct hsw_pipe_wm_parameters *params,
2218 uint32_t method1, method2;
2220 if (!params->active || !params->sprite_enabled)
2223 method1 = hsw_wm_method1(params->pixel_rate,
2224 params->spr_bytes_per_pixel,
2226 method2 = hsw_wm_method2(params->pixel_rate,
2227 params->pipe_htotal,
2228 params->spr_horiz_pixels,
2229 params->spr_bytes_per_pixel,
2231 return min(method1, method2);
2234 /* For both WM_PIPE and WM_LP. */
2235 static uint32_t hsw_compute_cur_wm(struct hsw_pipe_wm_parameters *params,
2238 if (!params->active)
2241 return hsw_wm_method2(params->pixel_rate,
2242 params->pipe_htotal,
2243 params->cur_horiz_pixels,
2244 params->cur_bytes_per_pixel,
2248 /* Only for WM_LP. */
2249 static uint32_t hsw_compute_fbc_wm(struct hsw_pipe_wm_parameters *params,
2253 if (!params->active)
2256 return hsw_wm_fbc(pri_val,
2257 params->pri_horiz_pixels,
2258 params->pri_bytes_per_pixel);
2261 static bool hsw_compute_lp_wm(uint32_t mem_value, struct hsw_wm_maximums *max,
2262 struct hsw_pipe_wm_parameters *params,
2263 struct hsw_lp_wm_result *result)
2266 uint32_t pri_val[3], spr_val[3], cur_val[3], fbc_val[3];
2268 for (pipe = PIPE_A; pipe <= PIPE_C; pipe++) {
2269 struct hsw_pipe_wm_parameters *p = ¶ms[pipe];
2271 pri_val[pipe] = hsw_compute_pri_wm(p, mem_value, true);
2272 spr_val[pipe] = hsw_compute_spr_wm(p, mem_value);
2273 cur_val[pipe] = hsw_compute_cur_wm(p, mem_value);
2274 fbc_val[pipe] = hsw_compute_fbc_wm(p, pri_val[pipe], mem_value);
2277 result->pri_val = max3(pri_val[0], pri_val[1], pri_val[2]);
2278 result->spr_val = max3(spr_val[0], spr_val[1], spr_val[2]);
2279 result->cur_val = max3(cur_val[0], cur_val[1], cur_val[2]);
2280 result->fbc_val = max3(fbc_val[0], fbc_val[1], fbc_val[2]);
2282 if (result->fbc_val > max->fbc) {
2283 result->fbc_enable = false;
2284 result->fbc_val = 0;
2286 result->fbc_enable = true;
2289 result->enable = result->pri_val <= max->pri &&
2290 result->spr_val <= max->spr &&
2291 result->cur_val <= max->cur;
2292 return result->enable;
2295 static uint32_t hsw_compute_wm_pipe(struct drm_i915_private *dev_priv,
2296 uint32_t mem_value, enum pipe pipe,
2297 struct hsw_pipe_wm_parameters *params)
2299 uint32_t pri_val, cur_val, spr_val;
2301 pri_val = hsw_compute_pri_wm(params, mem_value, false);
2302 spr_val = hsw_compute_spr_wm(params, mem_value);
2303 cur_val = hsw_compute_cur_wm(params, mem_value);
2306 "Primary WM error, mode not supported for pipe %c\n",
2309 "Sprite WM error, mode not supported for pipe %c\n",
2312 "Cursor WM error, mode not supported for pipe %c\n",
2315 return (pri_val << WM0_PIPE_PLANE_SHIFT) |
2316 (spr_val << WM0_PIPE_SPRITE_SHIFT) |
2321 hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
2323 struct drm_i915_private *dev_priv = dev->dev_private;
2324 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2325 struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
2326 u32 linetime, ips_linetime;
2328 if (!intel_crtc_active(crtc))
2331 /* The WM are computed with base on how long it takes to fill a single
2332 * row at the given clock rate, multiplied by 8.
2334 linetime = DIV_ROUND_CLOSEST(mode->htotal * 1000 * 8, mode->clock);
2335 ips_linetime = DIV_ROUND_CLOSEST(mode->htotal * 1000 * 8,
2336 intel_ddi_get_cdclk_freq(dev_priv));
2338 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
2339 PIPE_WM_LINETIME_TIME(linetime);
2342 static void hsw_compute_wm_parameters(struct drm_device *dev,
2343 struct hsw_pipe_wm_parameters *params,
2345 struct hsw_wm_maximums *lp_max_1_2,
2346 struct hsw_wm_maximums *lp_max_5_6)
2348 struct drm_i915_private *dev_priv = dev->dev_private;
2349 struct drm_crtc *crtc;
2350 struct drm_plane *plane;
2351 uint64_t sskpd = I915_READ64(MCH_SSKPD);
2353 int pipes_active = 0, sprites_enabled = 0;
2355 if ((sskpd >> 56) & 0xFF)
2356 wm[0] = (sskpd >> 56) & 0xFF;
2358 wm[0] = sskpd & 0xF;
2359 wm[1] = ((sskpd >> 4) & 0xFF) * 5;
2360 wm[2] = ((sskpd >> 12) & 0xFF) * 5;
2361 wm[3] = ((sskpd >> 20) & 0x1FF) * 5;
2362 wm[4] = ((sskpd >> 32) & 0x1FF) * 5;
2364 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2365 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2366 struct hsw_pipe_wm_parameters *p;
2368 pipe = intel_crtc->pipe;
2371 p->active = intel_crtc_active(crtc);
2377 p->pipe_htotal = intel_crtc->config.adjusted_mode.htotal;
2378 p->pixel_rate = hsw_wm_get_pixel_rate(dev, crtc);
2379 p->pri_bytes_per_pixel = crtc->fb->bits_per_pixel / 8;
2380 p->cur_bytes_per_pixel = 4;
2381 p->pri_horiz_pixels =
2382 intel_crtc->config.requested_mode.hdisplay;
2383 p->cur_horiz_pixels = 64;
2386 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
2387 struct intel_plane *intel_plane = to_intel_plane(plane);
2388 struct hsw_pipe_wm_parameters *p;
2390 pipe = intel_plane->pipe;
2393 p->sprite_enabled = intel_plane->wm.enable;
2394 p->spr_bytes_per_pixel = intel_plane->wm.bytes_per_pixel;
2395 p->spr_horiz_pixels = intel_plane->wm.horiz_pixels;
2397 if (p->sprite_enabled)
2401 if (pipes_active > 1) {
2402 lp_max_1_2->pri = lp_max_5_6->pri = sprites_enabled ? 128 : 256;
2403 lp_max_1_2->spr = lp_max_5_6->spr = 128;
2404 lp_max_1_2->cur = lp_max_5_6->cur = 64;
2406 lp_max_1_2->pri = sprites_enabled ? 384 : 768;
2407 lp_max_5_6->pri = sprites_enabled ? 128 : 768;
2408 lp_max_1_2->spr = 384;
2409 lp_max_5_6->spr = 640;
2410 lp_max_1_2->cur = lp_max_5_6->cur = 255;
2412 lp_max_1_2->fbc = lp_max_5_6->fbc = 15;
2415 static void hsw_compute_wm_results(struct drm_device *dev,
2416 struct hsw_pipe_wm_parameters *params,
2418 struct hsw_wm_maximums *lp_maximums,
2419 struct hsw_wm_values *results)
2421 struct drm_i915_private *dev_priv = dev->dev_private;
2422 struct drm_crtc *crtc;
2423 struct hsw_lp_wm_result lp_results[4] = {};
2425 int level, max_level, wm_lp;
2427 for (level = 1; level <= 4; level++)
2428 if (!hsw_compute_lp_wm(wm[level], lp_maximums, params,
2429 &lp_results[level - 1]))
2431 max_level = level - 1;
2433 /* The spec says it is preferred to disable FBC WMs instead of disabling
2435 results->enable_fbc_wm = true;
2436 for (level = 1; level <= max_level; level++) {
2437 if (!lp_results[level - 1].fbc_enable) {
2438 results->enable_fbc_wm = false;
2443 memset(results, 0, sizeof(*results));
2444 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2445 const struct hsw_lp_wm_result *r;
2447 level = (max_level == 4 && wm_lp > 1) ? wm_lp + 1 : wm_lp;
2448 if (level > max_level)
2451 r = &lp_results[level - 1];
2452 results->wm_lp[wm_lp - 1] = HSW_WM_LP_VAL(level * 2,
2456 results->wm_lp_spr[wm_lp - 1] = r->spr_val;
2460 results->wm_pipe[pipe] = hsw_compute_wm_pipe(dev_priv, wm[0],
2464 for_each_pipe(pipe) {
2465 crtc = dev_priv->pipe_to_crtc_mapping[pipe];
2466 results->wm_linetime[pipe] = hsw_compute_linetime_wm(dev, crtc);
2470 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2471 * case both are at the same level. Prefer r1 in case they're the same. */
2472 static struct hsw_wm_values *hsw_find_best_result(struct hsw_wm_values *r1,
2473 struct hsw_wm_values *r2)
2475 int i, val_r1 = 0, val_r2 = 0;
2477 for (i = 0; i < 3; i++) {
2478 if (r1->wm_lp[i] & WM3_LP_EN)
2479 val_r1 = r1->wm_lp[i] & WM1_LP_LATENCY_MASK;
2480 if (r2->wm_lp[i] & WM3_LP_EN)
2481 val_r2 = r2->wm_lp[i] & WM1_LP_LATENCY_MASK;
2484 if (val_r1 == val_r2) {
2485 if (r2->enable_fbc_wm && !r1->enable_fbc_wm)
2489 } else if (val_r1 > val_r2) {
2497 * The spec says we shouldn't write when we don't need, because every write
2498 * causes WMs to be re-evaluated, expending some power.
2500 static void hsw_write_wm_values(struct drm_i915_private *dev_priv,
2501 struct hsw_wm_values *results,
2502 enum hsw_data_buf_partitioning partitioning)
2504 struct hsw_wm_values previous;
2506 enum hsw_data_buf_partitioning prev_partitioning;
2507 bool prev_enable_fbc_wm;
2509 previous.wm_pipe[0] = I915_READ(WM0_PIPEA_ILK);
2510 previous.wm_pipe[1] = I915_READ(WM0_PIPEB_ILK);
2511 previous.wm_pipe[2] = I915_READ(WM0_PIPEC_IVB);
2512 previous.wm_lp[0] = I915_READ(WM1_LP_ILK);
2513 previous.wm_lp[1] = I915_READ(WM2_LP_ILK);
2514 previous.wm_lp[2] = I915_READ(WM3_LP_ILK);
2515 previous.wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
2516 previous.wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
2517 previous.wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
2518 previous.wm_linetime[0] = I915_READ(PIPE_WM_LINETIME(PIPE_A));
2519 previous.wm_linetime[1] = I915_READ(PIPE_WM_LINETIME(PIPE_B));
2520 previous.wm_linetime[2] = I915_READ(PIPE_WM_LINETIME(PIPE_C));
2522 prev_partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?
2523 HSW_DATA_BUF_PART_5_6 : HSW_DATA_BUF_PART_1_2;
2525 prev_enable_fbc_wm = !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS);
2527 if (memcmp(results->wm_pipe, previous.wm_pipe,
2528 sizeof(results->wm_pipe)) == 0 &&
2529 memcmp(results->wm_lp, previous.wm_lp,
2530 sizeof(results->wm_lp)) == 0 &&
2531 memcmp(results->wm_lp_spr, previous.wm_lp_spr,
2532 sizeof(results->wm_lp_spr)) == 0 &&
2533 memcmp(results->wm_linetime, previous.wm_linetime,
2534 sizeof(results->wm_linetime)) == 0 &&
2535 partitioning == prev_partitioning &&
2536 results->enable_fbc_wm == prev_enable_fbc_wm)
2539 if (previous.wm_lp[2] != 0)
2540 I915_WRITE(WM3_LP_ILK, 0);
2541 if (previous.wm_lp[1] != 0)
2542 I915_WRITE(WM2_LP_ILK, 0);
2543 if (previous.wm_lp[0] != 0)
2544 I915_WRITE(WM1_LP_ILK, 0);
2546 if (previous.wm_pipe[0] != results->wm_pipe[0])
2547 I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]);
2548 if (previous.wm_pipe[1] != results->wm_pipe[1])
2549 I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]);
2550 if (previous.wm_pipe[2] != results->wm_pipe[2])
2551 I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]);
2553 if (previous.wm_linetime[0] != results->wm_linetime[0])
2554 I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]);
2555 if (previous.wm_linetime[1] != results->wm_linetime[1])
2556 I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]);
2557 if (previous.wm_linetime[2] != results->wm_linetime[2])
2558 I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]);
2560 if (prev_partitioning != partitioning) {
2561 val = I915_READ(WM_MISC);
2562 if (partitioning == HSW_DATA_BUF_PART_1_2)
2563 val &= ~WM_MISC_DATA_PARTITION_5_6;
2565 val |= WM_MISC_DATA_PARTITION_5_6;
2566 I915_WRITE(WM_MISC, val);
2569 if (prev_enable_fbc_wm != results->enable_fbc_wm) {
2570 val = I915_READ(DISP_ARB_CTL);
2571 if (results->enable_fbc_wm)
2572 val &= ~DISP_FBC_WM_DIS;
2574 val |= DISP_FBC_WM_DIS;
2575 I915_WRITE(DISP_ARB_CTL, val);
2578 if (previous.wm_lp_spr[0] != results->wm_lp_spr[0])
2579 I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]);
2580 if (previous.wm_lp_spr[1] != results->wm_lp_spr[1])
2581 I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]);
2582 if (previous.wm_lp_spr[2] != results->wm_lp_spr[2])
2583 I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]);
2585 if (results->wm_lp[0] != 0)
2586 I915_WRITE(WM1_LP_ILK, results->wm_lp[0]);
2587 if (results->wm_lp[1] != 0)
2588 I915_WRITE(WM2_LP_ILK, results->wm_lp[1]);
2589 if (results->wm_lp[2] != 0)
2590 I915_WRITE(WM3_LP_ILK, results->wm_lp[2]);
2593 static void haswell_update_wm(struct drm_device *dev)
2595 struct drm_i915_private *dev_priv = dev->dev_private;
2596 struct hsw_wm_maximums lp_max_1_2, lp_max_5_6;
2597 struct hsw_pipe_wm_parameters params[3];
2598 struct hsw_wm_values results_1_2, results_5_6, *best_results;
2600 enum hsw_data_buf_partitioning partitioning;
2602 hsw_compute_wm_parameters(dev, params, wm, &lp_max_1_2, &lp_max_5_6);
2604 hsw_compute_wm_results(dev, params, wm, &lp_max_1_2, &results_1_2);
2605 if (lp_max_1_2.pri != lp_max_5_6.pri) {
2606 hsw_compute_wm_results(dev, params, wm, &lp_max_5_6,
2608 best_results = hsw_find_best_result(&results_1_2, &results_5_6);
2610 best_results = &results_1_2;
2613 partitioning = (best_results == &results_1_2) ?
2614 HSW_DATA_BUF_PART_1_2 : HSW_DATA_BUF_PART_5_6;
2616 hsw_write_wm_values(dev_priv, best_results, partitioning);
2619 static void haswell_update_sprite_wm(struct drm_device *dev, int pipe,
2620 uint32_t sprite_width, int pixel_size,
2623 struct drm_plane *plane;
2625 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
2626 struct intel_plane *intel_plane = to_intel_plane(plane);
2628 if (intel_plane->pipe == pipe) {
2629 intel_plane->wm.enable = enable;
2630 intel_plane->wm.horiz_pixels = sprite_width + 1;
2631 intel_plane->wm.bytes_per_pixel = pixel_size;
2636 haswell_update_wm(dev);
2640 sandybridge_compute_sprite_wm(struct drm_device *dev, int plane,
2641 uint32_t sprite_width, int pixel_size,
2642 const struct intel_watermark_params *display,
2643 int display_latency_ns, int *sprite_wm)
2645 struct drm_crtc *crtc;
2647 int entries, tlb_miss;
2649 crtc = intel_get_crtc_for_plane(dev, plane);
2650 if (!intel_crtc_active(crtc)) {
2651 *sprite_wm = display->guard_size;
2655 clock = crtc->mode.clock;
2657 /* Use the small buffer method to calculate the sprite watermark */
2658 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
2659 tlb_miss = display->fifo_size*display->cacheline_size -
2662 entries += tlb_miss;
2663 entries = DIV_ROUND_UP(entries, display->cacheline_size);
2664 *sprite_wm = entries + display->guard_size;
2665 if (*sprite_wm > (int)display->max_wm)
2666 *sprite_wm = display->max_wm;
2672 sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane,
2673 uint32_t sprite_width, int pixel_size,
2674 const struct intel_watermark_params *display,
2675 int latency_ns, int *sprite_wm)
2677 struct drm_crtc *crtc;
2678 unsigned long line_time_us;
2680 int line_count, line_size;
2689 crtc = intel_get_crtc_for_plane(dev, plane);
2690 clock = crtc->mode.clock;
2696 line_time_us = (sprite_width * 1000) / clock;
2697 if (!line_time_us) {
2702 line_count = (latency_ns / line_time_us + 1000) / 1000;
2703 line_size = sprite_width * pixel_size;
2705 /* Use the minimum of the small and large buffer method for primary */
2706 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
2707 large = line_count * line_size;
2709 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
2710 *sprite_wm = entries + display->guard_size;
2712 return *sprite_wm > 0x3ff ? false : true;
2715 static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
2716 uint32_t sprite_width, int pixel_size,
2719 struct drm_i915_private *dev_priv = dev->dev_private;
2720 int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
2730 reg = WM0_PIPEA_ILK;
2733 reg = WM0_PIPEB_ILK;
2736 reg = WM0_PIPEC_IVB;
2739 return; /* bad pipe */
2742 ret = sandybridge_compute_sprite_wm(dev, pipe, sprite_width, pixel_size,
2743 &sandybridge_display_wm_info,
2744 latency, &sprite_wm);
2746 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %c\n",
2751 val = I915_READ(reg);
2752 val &= ~WM0_PIPE_SPRITE_MASK;
2753 I915_WRITE(reg, val | (sprite_wm << WM0_PIPE_SPRITE_SHIFT));
2754 DRM_DEBUG_KMS("sprite watermarks For pipe %c - %d\n", pipe_name(pipe), sprite_wm);
2757 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
2759 &sandybridge_display_srwm_info,
2760 SNB_READ_WM1_LATENCY() * 500,
2763 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n",
2767 I915_WRITE(WM1S_LP_ILK, sprite_wm);
2769 /* Only IVB has two more LP watermarks for sprite */
2770 if (!IS_IVYBRIDGE(dev))
2773 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
2775 &sandybridge_display_srwm_info,
2776 SNB_READ_WM2_LATENCY() * 500,
2779 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n",
2783 I915_WRITE(WM2S_LP_IVB, sprite_wm);
2785 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
2787 &sandybridge_display_srwm_info,
2788 SNB_READ_WM3_LATENCY() * 500,
2791 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n",
2795 I915_WRITE(WM3S_LP_IVB, sprite_wm);
2799 * intel_update_watermarks - update FIFO watermark values based on current modes
2801 * Calculate watermark values for the various WM regs based on current mode
2802 * and plane configuration.
2804 * There are several cases to deal with here:
2805 * - normal (i.e. non-self-refresh)
2806 * - self-refresh (SR) mode
2807 * - lines are large relative to FIFO size (buffer can hold up to 2)
2808 * - lines are small relative to FIFO size (buffer can hold more than 2
2809 * lines), so need to account for TLB latency
2811 * The normal calculation is:
2812 * watermark = dotclock * bytes per pixel * latency
2813 * where latency is platform & configuration dependent (we assume pessimal
2816 * The SR calculation is:
2817 * watermark = (trunc(latency/line time)+1) * surface width *
2820 * line time = htotal / dotclock
2821 * surface width = hdisplay for normal plane and 64 for cursor
2822 * and latency is assumed to be high, as above.
2824 * The final value programmed to the register should always be rounded up,
2825 * and include an extra 2 entries to account for clock crossings.
2827 * We don't use the sprite, so we can ignore that. And on Crestline we have
2828 * to set the non-SR watermarks to 8.
2830 void intel_update_watermarks(struct drm_device *dev)
2832 struct drm_i915_private *dev_priv = dev->dev_private;
2834 if (dev_priv->display.update_wm)
2835 dev_priv->display.update_wm(dev);
2838 void intel_update_sprite_watermarks(struct drm_device *dev, int pipe,
2839 uint32_t sprite_width, int pixel_size,
2842 struct drm_i915_private *dev_priv = dev->dev_private;
2844 if (dev_priv->display.update_sprite_wm)
2845 dev_priv->display.update_sprite_wm(dev, pipe, sprite_width,
2846 pixel_size, enable);
2849 static struct drm_i915_gem_object *
2850 intel_alloc_context_page(struct drm_device *dev)
2852 struct drm_i915_gem_object *ctx;
2855 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
2857 ctx = i915_gem_alloc_object(dev, 4096);
2859 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
2863 ret = i915_gem_object_pin(ctx, 4096, true, false);
2865 DRM_ERROR("failed to pin power context: %d\n", ret);
2869 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
2871 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
2878 i915_gem_object_unpin(ctx);
2880 drm_gem_object_unreference(&ctx->base);
2885 * Lock protecting IPS related data structures
2887 DEFINE_SPINLOCK(mchdev_lock);
2889 /* Global for IPS driver to get at the current i915 device. Protected by
2891 static struct drm_i915_private *i915_mch_dev;
2893 bool ironlake_set_drps(struct drm_device *dev, u8 val)
2895 struct drm_i915_private *dev_priv = dev->dev_private;
2898 assert_spin_locked(&mchdev_lock);
2900 rgvswctl = I915_READ16(MEMSWCTL);
2901 if (rgvswctl & MEMCTL_CMD_STS) {
2902 DRM_DEBUG("gpu busy, RCS change rejected\n");
2903 return false; /* still busy with another command */
2906 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
2907 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
2908 I915_WRITE16(MEMSWCTL, rgvswctl);
2909 POSTING_READ16(MEMSWCTL);
2911 rgvswctl |= MEMCTL_CMD_STS;
2912 I915_WRITE16(MEMSWCTL, rgvswctl);
2917 static void ironlake_enable_drps(struct drm_device *dev)
2919 struct drm_i915_private *dev_priv = dev->dev_private;
2920 u32 rgvmodectl = I915_READ(MEMMODECTL);
2921 u8 fmax, fmin, fstart, vstart;
2923 spin_lock_irq(&mchdev_lock);
2925 /* Enable temp reporting */
2926 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
2927 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
2929 /* 100ms RC evaluation intervals */
2930 I915_WRITE(RCUPEI, 100000);
2931 I915_WRITE(RCDNEI, 100000);
2933 /* Set max/min thresholds to 90ms and 80ms respectively */
2934 I915_WRITE(RCBMAXAVG, 90000);
2935 I915_WRITE(RCBMINAVG, 80000);
2937 I915_WRITE(MEMIHYST, 1);
2939 /* Set up min, max, and cur for interrupt handling */
2940 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
2941 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
2942 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
2943 MEMMODE_FSTART_SHIFT;
2945 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
2948 dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
2949 dev_priv->ips.fstart = fstart;
2951 dev_priv->ips.max_delay = fstart;
2952 dev_priv->ips.min_delay = fmin;
2953 dev_priv->ips.cur_delay = fstart;
2955 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
2956 fmax, fmin, fstart);
2958 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
2961 * Interrupts will be enabled in ironlake_irq_postinstall
2964 I915_WRITE(VIDSTART, vstart);
2965 POSTING_READ(VIDSTART);
2967 rgvmodectl |= MEMMODE_SWMODE_EN;
2968 I915_WRITE(MEMMODECTL, rgvmodectl);
2970 if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
2971 DRM_ERROR("stuck trying to change perf mode\n");
2974 ironlake_set_drps(dev, fstart);
2976 dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
2978 dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
2979 dev_priv->ips.last_count2 = I915_READ(0x112f4);
2980 getrawmonotonic(&dev_priv->ips.last_time2);
2982 spin_unlock_irq(&mchdev_lock);
2985 static void ironlake_disable_drps(struct drm_device *dev)
2987 struct drm_i915_private *dev_priv = dev->dev_private;
2990 spin_lock_irq(&mchdev_lock);
2992 rgvswctl = I915_READ16(MEMSWCTL);
2994 /* Ack interrupts, disable EFC interrupt */
2995 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
2996 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
2997 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
2998 I915_WRITE(DEIIR, DE_PCU_EVENT);
2999 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
3001 /* Go back to the starting frequency */
3002 ironlake_set_drps(dev, dev_priv->ips.fstart);
3004 rgvswctl |= MEMCTL_CMD_STS;
3005 I915_WRITE(MEMSWCTL, rgvswctl);
3008 spin_unlock_irq(&mchdev_lock);
3011 /* There's a funny hw issue where the hw returns all 0 when reading from
3012 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
3013 * ourselves, instead of doing a rmw cycle (which might result in us clearing
3014 * all limits and the gpu stuck at whatever frequency it is at atm).
3016 static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 *val)
3022 if (*val >= dev_priv->rps.max_delay)
3023 *val = dev_priv->rps.max_delay;
3024 limits |= dev_priv->rps.max_delay << 24;
3026 /* Only set the down limit when we've reached the lowest level to avoid
3027 * getting more interrupts, otherwise leave this clear. This prevents a
3028 * race in the hw when coming out of rc6: There's a tiny window where
3029 * the hw runs at the minimal clock before selecting the desired
3030 * frequency, if the down threshold expires in that window we will not
3031 * receive a down interrupt. */
3032 if (*val <= dev_priv->rps.min_delay) {
3033 *val = dev_priv->rps.min_delay;
3034 limits |= dev_priv->rps.min_delay << 16;
3040 void gen6_set_rps(struct drm_device *dev, u8 val)
3042 struct drm_i915_private *dev_priv = dev->dev_private;
3043 u32 limits = gen6_rps_limits(dev_priv, &val);
3045 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3046 WARN_ON(val > dev_priv->rps.max_delay);
3047 WARN_ON(val < dev_priv->rps.min_delay);
3049 if (val == dev_priv->rps.cur_delay)
3052 if (IS_HASWELL(dev))
3053 I915_WRITE(GEN6_RPNSWREQ,
3054 HSW_FREQUENCY(val));
3056 I915_WRITE(GEN6_RPNSWREQ,
3057 GEN6_FREQUENCY(val) |
3059 GEN6_AGGRESSIVE_TURBO);
3061 /* Make sure we continue to get interrupts
3062 * until we hit the minimum or maximum frequencies.
3064 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, limits);
3066 POSTING_READ(GEN6_RPNSWREQ);
3068 dev_priv->rps.cur_delay = val;
3070 trace_intel_gpu_freq_change(val * 50);
3074 * Wait until the previous freq change has completed,
3075 * or the timeout elapsed, and then update our notion
3076 * of the current GPU frequency.
3078 static void vlv_update_rps_cur_delay(struct drm_i915_private *dev_priv)
3082 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3084 if (wait_for(((pval = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS)) & GENFREQSTATUS) == 0, 10))
3085 DRM_DEBUG_DRIVER("timed out waiting for Punit\n");
3089 if (pval != dev_priv->rps.cur_delay)
3090 DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n",
3091 vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.cur_delay),
3092 dev_priv->rps.cur_delay,
3093 vlv_gpu_freq(dev_priv->mem_freq, pval), pval);
3095 dev_priv->rps.cur_delay = pval;
3098 void valleyview_set_rps(struct drm_device *dev, u8 val)
3100 struct drm_i915_private *dev_priv = dev->dev_private;
3102 gen6_rps_limits(dev_priv, &val);
3104 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3105 WARN_ON(val > dev_priv->rps.max_delay);
3106 WARN_ON(val < dev_priv->rps.min_delay);
3108 vlv_update_rps_cur_delay(dev_priv);
3110 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3111 vlv_gpu_freq(dev_priv->mem_freq,
3112 dev_priv->rps.cur_delay),
3113 dev_priv->rps.cur_delay,
3114 vlv_gpu_freq(dev_priv->mem_freq, val), val);
3116 if (val == dev_priv->rps.cur_delay)
3119 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
3121 dev_priv->rps.cur_delay = val;
3123 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv->mem_freq, val));
3126 static void gen6_disable_rps_interrupts(struct drm_device *dev)
3128 struct drm_i915_private *dev_priv = dev->dev_private;
3130 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3131 I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS);
3132 /* Complete PM interrupt masking here doesn't race with the rps work
3133 * item again unmasking PM interrupts because that is using a different
3134 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3135 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3137 spin_lock_irq(&dev_priv->irq_lock);
3138 dev_priv->rps.pm_iir = 0;
3139 spin_unlock_irq(&dev_priv->irq_lock);
3141 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3144 static void gen6_disable_rps(struct drm_device *dev)
3146 struct drm_i915_private *dev_priv = dev->dev_private;
3148 I915_WRITE(GEN6_RC_CONTROL, 0);
3149 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
3151 gen6_disable_rps_interrupts(dev);
3154 static void valleyview_disable_rps(struct drm_device *dev)
3156 struct drm_i915_private *dev_priv = dev->dev_private;
3158 I915_WRITE(GEN6_RC_CONTROL, 0);
3160 gen6_disable_rps_interrupts(dev);
3162 if (dev_priv->vlv_pctx) {
3163 drm_gem_object_unreference(&dev_priv->vlv_pctx->base);
3164 dev_priv->vlv_pctx = NULL;
3168 int intel_enable_rc6(const struct drm_device *dev)
3170 /* Respect the kernel parameter if it is set */
3171 if (i915_enable_rc6 >= 0)
3172 return i915_enable_rc6;
3174 /* Disable RC6 on Ironlake */
3175 if (INTEL_INFO(dev)->gen == 5)
3178 if (IS_HASWELL(dev)) {
3179 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3180 return INTEL_RC6_ENABLE;
3183 /* snb/ivb have more than one rc6 state. */
3184 if (INTEL_INFO(dev)->gen == 6) {
3185 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3186 return INTEL_RC6_ENABLE;
3189 DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n");
3190 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
3193 static void gen6_enable_rps_interrupts(struct drm_device *dev)
3195 struct drm_i915_private *dev_priv = dev->dev_private;
3197 spin_lock_irq(&dev_priv->irq_lock);
3198 WARN_ON(dev_priv->rps.pm_iir);
3199 I915_WRITE(GEN6_PMIMR, I915_READ(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS);
3200 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3201 spin_unlock_irq(&dev_priv->irq_lock);
3202 /* unmask all PM interrupts */
3203 I915_WRITE(GEN6_PMINTRMSK, 0);
3206 static void gen6_enable_rps(struct drm_device *dev)
3208 struct drm_i915_private *dev_priv = dev->dev_private;
3209 struct intel_ring_buffer *ring;
3212 u32 rc6vids, pcu_mbox, rc6_mask = 0;
3217 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3219 /* Here begins a magic sequence of register writes to enable
3220 * auto-downclocking.
3222 * Perhaps there might be some value in exposing these to
3225 I915_WRITE(GEN6_RC_STATE, 0);
3227 /* Clear the DBG now so we don't confuse earlier errors */
3228 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3229 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
3230 I915_WRITE(GTFIFODBG, gtfifodbg);
3233 gen6_gt_force_wake_get(dev_priv);
3235 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3236 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
3238 /* In units of 50MHz */
3239 dev_priv->rps.hw_max = dev_priv->rps.max_delay = rp_state_cap & 0xff;
3240 dev_priv->rps.min_delay = (rp_state_cap & 0xff0000) >> 16;
3241 dev_priv->rps.cur_delay = 0;
3243 /* disable the counters and set deterministic thresholds */
3244 I915_WRITE(GEN6_RC_CONTROL, 0);
3246 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
3247 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
3248 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
3249 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3250 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3252 for_each_ring(ring, dev_priv, i)
3253 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3255 I915_WRITE(GEN6_RC_SLEEP, 0);
3256 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
3257 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
3258 I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
3259 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
3261 /* Check if we are enabling RC6 */
3262 rc6_mode = intel_enable_rc6(dev_priv->dev);
3263 if (rc6_mode & INTEL_RC6_ENABLE)
3264 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
3266 /* We don't use those on Haswell */
3267 if (!IS_HASWELL(dev)) {
3268 if (rc6_mode & INTEL_RC6p_ENABLE)
3269 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
3271 if (rc6_mode & INTEL_RC6pp_ENABLE)
3272 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
3275 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3276 (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off",
3277 (rc6_mask & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off",
3278 (rc6_mask & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off");
3280 I915_WRITE(GEN6_RC_CONTROL,
3282 GEN6_RC_CTL_EI_MODE(1) |
3283 GEN6_RC_CTL_HW_ENABLE);
3285 if (IS_HASWELL(dev)) {
3286 I915_WRITE(GEN6_RPNSWREQ,
3288 I915_WRITE(GEN6_RC_VIDEO_FREQ,
3291 I915_WRITE(GEN6_RPNSWREQ,
3292 GEN6_FREQUENCY(10) |
3294 GEN6_AGGRESSIVE_TURBO);
3295 I915_WRITE(GEN6_RC_VIDEO_FREQ,
3296 GEN6_FREQUENCY(12));
3299 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
3300 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3301 dev_priv->rps.max_delay << 24 |
3302 dev_priv->rps.min_delay << 16);
3304 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
3305 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
3306 I915_WRITE(GEN6_RP_UP_EI, 66000);
3307 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
3309 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3310 I915_WRITE(GEN6_RP_CONTROL,
3311 GEN6_RP_MEDIA_TURBO |
3312 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3313 GEN6_RP_MEDIA_IS_GFX |
3315 GEN6_RP_UP_BUSY_AVG |
3316 (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT));
3318 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
3321 ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
3322 if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
3323 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3324 (dev_priv->rps.max_delay & 0xff) * 50,
3325 (pcu_mbox & 0xff) * 50);
3326 dev_priv->rps.hw_max = pcu_mbox & 0xff;
3329 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3332 gen6_set_rps(dev_priv->dev, (gt_perf_status & 0xff00) >> 8);
3334 gen6_enable_rps_interrupts(dev);
3337 ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
3338 if (IS_GEN6(dev) && ret) {
3339 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3340 } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
3341 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3342 GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
3343 rc6vids &= 0xffff00;
3344 rc6vids |= GEN6_ENCODE_RC6_VID(450);
3345 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
3347 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3350 gen6_gt_force_wake_put(dev_priv);
3353 static void gen6_update_ring_freq(struct drm_device *dev)
3355 struct drm_i915_private *dev_priv = dev->dev_private;
3357 unsigned int gpu_freq;
3358 unsigned int max_ia_freq, min_ring_freq;
3359 int scaling_factor = 180;
3361 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3363 max_ia_freq = cpufreq_quick_get_max(0);
3365 * Default to measured freq if none found, PCU will ensure we don't go
3369 max_ia_freq = tsc_khz;
3371 /* Convert from kHz to MHz */
3372 max_ia_freq /= 1000;
3374 min_ring_freq = I915_READ(MCHBAR_MIRROR_BASE_SNB + DCLK);
3375 /* convert DDR frequency from units of 133.3MHz to bandwidth */
3376 min_ring_freq = (2 * 4 * min_ring_freq + 2) / 3;
3379 * For each potential GPU frequency, load a ring frequency we'd like
3380 * to use for memory access. We do this by specifying the IA frequency
3381 * the PCU should use as a reference to determine the ring frequency.
3383 for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay;
3385 int diff = dev_priv->rps.max_delay - gpu_freq;
3386 unsigned int ia_freq = 0, ring_freq = 0;
3388 if (IS_HASWELL(dev)) {
3389 ring_freq = (gpu_freq * 5 + 3) / 4;
3390 ring_freq = max(min_ring_freq, ring_freq);
3391 /* leave ia_freq as the default, chosen by cpufreq */
3393 /* On older processors, there is no separate ring
3394 * clock domain, so in order to boost the bandwidth
3395 * of the ring, we need to upclock the CPU (ia_freq).
3397 * For GPU frequencies less than 750MHz,
3398 * just use the lowest ring freq.
3400 if (gpu_freq < min_freq)
3403 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
3404 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
3407 sandybridge_pcode_write(dev_priv,
3408 GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
3409 ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
3410 ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
3415 int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
3419 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
3421 rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
3423 rp0 = min_t(u32, rp0, 0xea);
3428 static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
3432 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
3433 rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
3434 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
3435 rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
3440 int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
3442 return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
3445 static void vlv_rps_timer_work(struct work_struct *work)
3447 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
3451 * Timer fired, we must be idle. Drop to min voltage state.
3452 * Note: we use RPe here since it should match the
3453 * Vmin we were shooting for. That should give us better
3454 * perf when we come back out of RC6 than if we used the
3455 * min freq available.
3457 mutex_lock(&dev_priv->rps.hw_lock);
3458 if (dev_priv->rps.cur_delay > dev_priv->rps.rpe_delay)
3459 valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
3460 mutex_unlock(&dev_priv->rps.hw_lock);
3463 static void valleyview_setup_pctx(struct drm_device *dev)
3465 struct drm_i915_private *dev_priv = dev->dev_private;
3466 struct drm_i915_gem_object *pctx;
3467 unsigned long pctx_paddr;
3469 int pctx_size = 24*1024;
3471 pcbr = I915_READ(VLV_PCBR);
3473 /* BIOS set it up already, grab the pre-alloc'd space */
3476 pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
3477 pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev,
3479 I915_GTT_OFFSET_NONE,
3485 * From the Gunit register HAS:
3486 * The Gfx driver is expected to program this register and ensure
3487 * proper allocation within Gfx stolen memory. For example, this
3488 * register should be programmed such than the PCBR range does not
3489 * overlap with other ranges, such as the frame buffer, protected
3490 * memory, or any other relevant ranges.
3492 pctx = i915_gem_object_create_stolen(dev, pctx_size);
3494 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
3498 pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
3499 I915_WRITE(VLV_PCBR, pctx_paddr);
3502 dev_priv->vlv_pctx = pctx;
3505 static void valleyview_enable_rps(struct drm_device *dev)
3507 struct drm_i915_private *dev_priv = dev->dev_private;
3508 struct intel_ring_buffer *ring;
3512 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3514 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3515 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
3516 I915_WRITE(GTFIFODBG, gtfifodbg);
3519 valleyview_setup_pctx(dev);
3521 gen6_gt_force_wake_get(dev_priv);
3523 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
3524 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
3525 I915_WRITE(GEN6_RP_UP_EI, 66000);
3526 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
3528 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3530 I915_WRITE(GEN6_RP_CONTROL,
3531 GEN6_RP_MEDIA_TURBO |
3532 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3533 GEN6_RP_MEDIA_IS_GFX |
3535 GEN6_RP_UP_BUSY_AVG |
3536 GEN6_RP_DOWN_IDLE_CONT);
3538 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
3539 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3540 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3542 for_each_ring(ring, dev_priv, i)
3543 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3545 I915_WRITE(GEN6_RC6_THRESHOLD, 0xc350);
3547 /* allows RC6 residency counter to work */
3548 I915_WRITE(0x138104, _MASKED_BIT_ENABLE(0x3));
3549 I915_WRITE(GEN6_RC_CONTROL,
3550 GEN7_RC_CTL_TO_MODE);
3552 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
3553 switch ((val >> 6) & 3) {
3556 dev_priv->mem_freq = 800;
3559 dev_priv->mem_freq = 1066;
3562 dev_priv->mem_freq = 1333;
3565 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
3567 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
3568 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
3570 dev_priv->rps.cur_delay = (val >> 8) & 0xff;
3571 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
3572 vlv_gpu_freq(dev_priv->mem_freq,
3573 dev_priv->rps.cur_delay),
3574 dev_priv->rps.cur_delay);
3576 dev_priv->rps.max_delay = valleyview_rps_max_freq(dev_priv);
3577 dev_priv->rps.hw_max = dev_priv->rps.max_delay;
3578 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
3579 vlv_gpu_freq(dev_priv->mem_freq,
3580 dev_priv->rps.max_delay),
3581 dev_priv->rps.max_delay);
3583 dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv);
3584 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
3585 vlv_gpu_freq(dev_priv->mem_freq,
3586 dev_priv->rps.rpe_delay),
3587 dev_priv->rps.rpe_delay);
3589 dev_priv->rps.min_delay = valleyview_rps_min_freq(dev_priv);
3590 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
3591 vlv_gpu_freq(dev_priv->mem_freq,
3592 dev_priv->rps.min_delay),
3593 dev_priv->rps.min_delay);
3595 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
3596 vlv_gpu_freq(dev_priv->mem_freq,
3597 dev_priv->rps.rpe_delay),
3598 dev_priv->rps.rpe_delay);
3600 INIT_DELAYED_WORK(&dev_priv->rps.vlv_work, vlv_rps_timer_work);
3602 valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
3604 gen6_enable_rps_interrupts(dev);
3606 gen6_gt_force_wake_put(dev_priv);
3609 void ironlake_teardown_rc6(struct drm_device *dev)
3611 struct drm_i915_private *dev_priv = dev->dev_private;
3613 if (dev_priv->ips.renderctx) {
3614 i915_gem_object_unpin(dev_priv->ips.renderctx);
3615 drm_gem_object_unreference(&dev_priv->ips.renderctx->base);
3616 dev_priv->ips.renderctx = NULL;
3619 if (dev_priv->ips.pwrctx) {
3620 i915_gem_object_unpin(dev_priv->ips.pwrctx);
3621 drm_gem_object_unreference(&dev_priv->ips.pwrctx->base);
3622 dev_priv->ips.pwrctx = NULL;
3626 static void ironlake_disable_rc6(struct drm_device *dev)
3628 struct drm_i915_private *dev_priv = dev->dev_private;
3630 if (I915_READ(PWRCTXA)) {
3631 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
3632 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
3633 wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
3636 I915_WRITE(PWRCTXA, 0);
3637 POSTING_READ(PWRCTXA);
3639 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3640 POSTING_READ(RSTDBYCTL);
3644 static int ironlake_setup_rc6(struct drm_device *dev)
3646 struct drm_i915_private *dev_priv = dev->dev_private;
3648 if (dev_priv->ips.renderctx == NULL)
3649 dev_priv->ips.renderctx = intel_alloc_context_page(dev);
3650 if (!dev_priv->ips.renderctx)
3653 if (dev_priv->ips.pwrctx == NULL)
3654 dev_priv->ips.pwrctx = intel_alloc_context_page(dev);
3655 if (!dev_priv->ips.pwrctx) {
3656 ironlake_teardown_rc6(dev);
3663 static void ironlake_enable_rc6(struct drm_device *dev)
3665 struct drm_i915_private *dev_priv = dev->dev_private;
3666 struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
3667 bool was_interruptible;
3670 /* rc6 disabled by default due to repeated reports of hanging during
3673 if (!intel_enable_rc6(dev))
3676 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
3678 ret = ironlake_setup_rc6(dev);
3682 was_interruptible = dev_priv->mm.interruptible;
3683 dev_priv->mm.interruptible = false;
3686 * GPU can automatically power down the render unit if given a page
3689 ret = intel_ring_begin(ring, 6);
3691 ironlake_teardown_rc6(dev);
3692 dev_priv->mm.interruptible = was_interruptible;
3696 intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
3697 intel_ring_emit(ring, MI_SET_CONTEXT);
3698 intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx) |
3700 MI_SAVE_EXT_STATE_EN |
3701 MI_RESTORE_EXT_STATE_EN |
3702 MI_RESTORE_INHIBIT);
3703 intel_ring_emit(ring, MI_SUSPEND_FLUSH);
3704 intel_ring_emit(ring, MI_NOOP);
3705 intel_ring_emit(ring, MI_FLUSH);
3706 intel_ring_advance(ring);
3709 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
3710 * does an implicit flush, combined with MI_FLUSH above, it should be
3711 * safe to assume that renderctx is valid
3713 ret = intel_ring_idle(ring);
3714 dev_priv->mm.interruptible = was_interruptible;
3716 DRM_ERROR("failed to enable ironlake power savings\n");
3717 ironlake_teardown_rc6(dev);
3721 I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN);
3722 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3725 static unsigned long intel_pxfreq(u32 vidfreq)
3728 int div = (vidfreq & 0x3f0000) >> 16;
3729 int post = (vidfreq & 0x3000) >> 12;
3730 int pre = (vidfreq & 0x7);
3735 freq = ((div * 133333) / ((1<<post) * pre));
3740 static const struct cparams {
3746 { 1, 1333, 301, 28664 },
3747 { 1, 1066, 294, 24460 },
3748 { 1, 800, 294, 25192 },
3749 { 0, 1333, 276, 27605 },
3750 { 0, 1066, 276, 27605 },
3751 { 0, 800, 231, 23784 },
3754 static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
3756 u64 total_count, diff, ret;
3757 u32 count1, count2, count3, m = 0, c = 0;
3758 unsigned long now = jiffies_to_msecs(jiffies), diff1;
3761 assert_spin_locked(&mchdev_lock);
3763 diff1 = now - dev_priv->ips.last_time1;
3765 /* Prevent division-by-zero if we are asking too fast.
3766 * Also, we don't get interesting results if we are polling
3767 * faster than once in 10ms, so just return the saved value
3771 return dev_priv->ips.chipset_power;
3773 count1 = I915_READ(DMIEC);
3774 count2 = I915_READ(DDREC);
3775 count3 = I915_READ(CSIEC);
3777 total_count = count1 + count2 + count3;
3779 /* FIXME: handle per-counter overflow */
3780 if (total_count < dev_priv->ips.last_count1) {
3781 diff = ~0UL - dev_priv->ips.last_count1;
3782 diff += total_count;
3784 diff = total_count - dev_priv->ips.last_count1;
3787 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
3788 if (cparams[i].i == dev_priv->ips.c_m &&
3789 cparams[i].t == dev_priv->ips.r_t) {
3796 diff = div_u64(diff, diff1);
3797 ret = ((m * diff) + c);
3798 ret = div_u64(ret, 10);
3800 dev_priv->ips.last_count1 = total_count;
3801 dev_priv->ips.last_time1 = now;
3803 dev_priv->ips.chipset_power = ret;
3808 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
3812 if (dev_priv->info->gen != 5)
3815 spin_lock_irq(&mchdev_lock);
3817 val = __i915_chipset_val(dev_priv);
3819 spin_unlock_irq(&mchdev_lock);
3824 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
3826 unsigned long m, x, b;
3829 tsfs = I915_READ(TSFS);
3831 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
3832 x = I915_READ8(TR1);
3834 b = tsfs & TSFS_INTR_MASK;
3836 return ((m * x) / 127) - b;
3839 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
3841 static const struct v_table {
3842 u16 vd; /* in .1 mil */
3843 u16 vm; /* in .1 mil */
3974 if (dev_priv->info->is_mobile)
3975 return v_table[pxvid].vm;
3977 return v_table[pxvid].vd;
3980 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
3982 struct timespec now, diff1;
3984 unsigned long diffms;
3987 assert_spin_locked(&mchdev_lock);
3989 getrawmonotonic(&now);
3990 diff1 = timespec_sub(now, dev_priv->ips.last_time2);
3992 /* Don't divide by 0 */
3993 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
3997 count = I915_READ(GFXEC);
3999 if (count < dev_priv->ips.last_count2) {
4000 diff = ~0UL - dev_priv->ips.last_count2;
4003 diff = count - dev_priv->ips.last_count2;
4006 dev_priv->ips.last_count2 = count;
4007 dev_priv->ips.last_time2 = now;
4009 /* More magic constants... */
4011 diff = div_u64(diff, diffms * 10);
4012 dev_priv->ips.gfx_power = diff;
4015 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
4017 if (dev_priv->info->gen != 5)
4020 spin_lock_irq(&mchdev_lock);
4022 __i915_update_gfx_val(dev_priv);
4024 spin_unlock_irq(&mchdev_lock);
4027 static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
4029 unsigned long t, corr, state1, corr2, state2;
4032 assert_spin_locked(&mchdev_lock);
4034 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4));
4035 pxvid = (pxvid >> 24) & 0x7f;
4036 ext_v = pvid_to_extvid(dev_priv, pxvid);
4040 t = i915_mch_val(dev_priv);
4042 /* Revel in the empirically derived constants */
4044 /* Correction factor in 1/100000 units */
4046 corr = ((t * 2349) + 135940);
4048 corr = ((t * 964) + 29317);
4050 corr = ((t * 301) + 1004);
4052 corr = corr * ((150142 * state1) / 10000 - 78642);
4054 corr2 = (corr * dev_priv->ips.corr);
4056 state2 = (corr2 * state1) / 10000;
4057 state2 /= 100; /* convert to mW */
4059 __i915_update_gfx_val(dev_priv);
4061 return dev_priv->ips.gfx_power + state2;
4064 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
4068 if (dev_priv->info->gen != 5)
4071 spin_lock_irq(&mchdev_lock);
4073 val = __i915_gfx_val(dev_priv);
4075 spin_unlock_irq(&mchdev_lock);
4081 * i915_read_mch_val - return value for IPS use
4083 * Calculate and return a value for the IPS driver to use when deciding whether
4084 * we have thermal and power headroom to increase CPU or GPU power budget.
4086 unsigned long i915_read_mch_val(void)
4088 struct drm_i915_private *dev_priv;
4089 unsigned long chipset_val, graphics_val, ret = 0;
4091 spin_lock_irq(&mchdev_lock);
4094 dev_priv = i915_mch_dev;
4096 chipset_val = __i915_chipset_val(dev_priv);
4097 graphics_val = __i915_gfx_val(dev_priv);
4099 ret = chipset_val + graphics_val;
4102 spin_unlock_irq(&mchdev_lock);
4106 EXPORT_SYMBOL_GPL(i915_read_mch_val);
4109 * i915_gpu_raise - raise GPU frequency limit
4111 * Raise the limit; IPS indicates we have thermal headroom.
4113 bool i915_gpu_raise(void)
4115 struct drm_i915_private *dev_priv;
4118 spin_lock_irq(&mchdev_lock);
4119 if (!i915_mch_dev) {
4123 dev_priv = i915_mch_dev;
4125 if (dev_priv->ips.max_delay > dev_priv->ips.fmax)
4126 dev_priv->ips.max_delay--;
4129 spin_unlock_irq(&mchdev_lock);
4133 EXPORT_SYMBOL_GPL(i915_gpu_raise);
4136 * i915_gpu_lower - lower GPU frequency limit
4138 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4139 * frequency maximum.
4141 bool i915_gpu_lower(void)
4143 struct drm_i915_private *dev_priv;
4146 spin_lock_irq(&mchdev_lock);
4147 if (!i915_mch_dev) {
4151 dev_priv = i915_mch_dev;
4153 if (dev_priv->ips.max_delay < dev_priv->ips.min_delay)
4154 dev_priv->ips.max_delay++;
4157 spin_unlock_irq(&mchdev_lock);
4161 EXPORT_SYMBOL_GPL(i915_gpu_lower);
4164 * i915_gpu_busy - indicate GPU business to IPS
4166 * Tell the IPS driver whether or not the GPU is busy.
4168 bool i915_gpu_busy(void)
4170 struct drm_i915_private *dev_priv;
4171 struct intel_ring_buffer *ring;
4175 spin_lock_irq(&mchdev_lock);
4178 dev_priv = i915_mch_dev;
4180 for_each_ring(ring, dev_priv, i)
4181 ret |= !list_empty(&ring->request_list);
4184 spin_unlock_irq(&mchdev_lock);
4188 EXPORT_SYMBOL_GPL(i915_gpu_busy);
4191 * i915_gpu_turbo_disable - disable graphics turbo
4193 * Disable graphics turbo by resetting the max frequency and setting the
4194 * current frequency to the default.
4196 bool i915_gpu_turbo_disable(void)
4198 struct drm_i915_private *dev_priv;
4201 spin_lock_irq(&mchdev_lock);
4202 if (!i915_mch_dev) {
4206 dev_priv = i915_mch_dev;
4208 dev_priv->ips.max_delay = dev_priv->ips.fstart;
4210 if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart))
4214 spin_unlock_irq(&mchdev_lock);
4218 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
4221 * Tells the intel_ips driver that the i915 driver is now loaded, if
4222 * IPS got loaded first.
4224 * This awkward dance is so that neither module has to depend on the
4225 * other in order for IPS to do the appropriate communication of
4226 * GPU turbo limits to i915.
4229 ips_ping_for_i915_load(void)
4233 link = symbol_get(ips_link_to_i915_driver);
4236 symbol_put(ips_link_to_i915_driver);
4240 void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
4242 /* We only register the i915 ips part with intel-ips once everything is
4243 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4244 spin_lock_irq(&mchdev_lock);
4245 i915_mch_dev = dev_priv;
4246 spin_unlock_irq(&mchdev_lock);
4248 ips_ping_for_i915_load();
4251 void intel_gpu_ips_teardown(void)
4253 spin_lock_irq(&mchdev_lock);
4254 i915_mch_dev = NULL;
4255 spin_unlock_irq(&mchdev_lock);
4257 static void intel_init_emon(struct drm_device *dev)
4259 struct drm_i915_private *dev_priv = dev->dev_private;
4264 /* Disable to program */
4268 /* Program energy weights for various events */
4269 I915_WRITE(SDEW, 0x15040d00);
4270 I915_WRITE(CSIEW0, 0x007f0000);
4271 I915_WRITE(CSIEW1, 0x1e220004);
4272 I915_WRITE(CSIEW2, 0x04000004);
4274 for (i = 0; i < 5; i++)
4275 I915_WRITE(PEW + (i * 4), 0);
4276 for (i = 0; i < 3; i++)
4277 I915_WRITE(DEW + (i * 4), 0);
4279 /* Program P-state weights to account for frequency power adjustment */
4280 for (i = 0; i < 16; i++) {
4281 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
4282 unsigned long freq = intel_pxfreq(pxvidfreq);
4283 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
4288 val *= (freq / 1000);
4290 val /= (127*127*900);
4292 DRM_ERROR("bad pxval: %ld\n", val);
4295 /* Render standby states get 0 weight */
4299 for (i = 0; i < 4; i++) {
4300 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
4301 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
4302 I915_WRITE(PXW + (i * 4), val);
4305 /* Adjust magic regs to magic values (more experimental results) */
4306 I915_WRITE(OGW0, 0);
4307 I915_WRITE(OGW1, 0);
4308 I915_WRITE(EG0, 0x00007f00);
4309 I915_WRITE(EG1, 0x0000000e);
4310 I915_WRITE(EG2, 0x000e0000);
4311 I915_WRITE(EG3, 0x68000300);
4312 I915_WRITE(EG4, 0x42000000);
4313 I915_WRITE(EG5, 0x00140031);
4317 for (i = 0; i < 8; i++)
4318 I915_WRITE(PXWL + (i * 4), 0);
4320 /* Enable PMON + select events */
4321 I915_WRITE(ECR, 0x80000019);
4323 lcfuse = I915_READ(LCFUSE02);
4325 dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
4328 void intel_disable_gt_powersave(struct drm_device *dev)
4330 struct drm_i915_private *dev_priv = dev->dev_private;
4332 /* Interrupts should be disabled already to avoid re-arming. */
4333 WARN_ON(dev->irq_enabled);
4335 if (IS_IRONLAKE_M(dev)) {
4336 ironlake_disable_drps(dev);
4337 ironlake_disable_rc6(dev);
4338 } else if (INTEL_INFO(dev)->gen >= 6) {
4339 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
4340 cancel_work_sync(&dev_priv->rps.work);
4341 if (IS_VALLEYVIEW(dev))
4342 cancel_delayed_work_sync(&dev_priv->rps.vlv_work);
4343 mutex_lock(&dev_priv->rps.hw_lock);
4344 if (IS_VALLEYVIEW(dev))
4345 valleyview_disable_rps(dev);
4347 gen6_disable_rps(dev);
4348 mutex_unlock(&dev_priv->rps.hw_lock);
4352 static void intel_gen6_powersave_work(struct work_struct *work)
4354 struct drm_i915_private *dev_priv =
4355 container_of(work, struct drm_i915_private,
4356 rps.delayed_resume_work.work);
4357 struct drm_device *dev = dev_priv->dev;
4359 mutex_lock(&dev_priv->rps.hw_lock);
4361 if (IS_VALLEYVIEW(dev)) {
4362 valleyview_enable_rps(dev);
4364 gen6_enable_rps(dev);
4365 gen6_update_ring_freq(dev);
4367 mutex_unlock(&dev_priv->rps.hw_lock);
4370 void intel_enable_gt_powersave(struct drm_device *dev)
4372 struct drm_i915_private *dev_priv = dev->dev_private;
4374 if (IS_IRONLAKE_M(dev)) {
4375 ironlake_enable_drps(dev);
4376 ironlake_enable_rc6(dev);
4377 intel_init_emon(dev);
4378 } else if (IS_GEN6(dev) || IS_GEN7(dev)) {
4380 * PCU communication is slow and this doesn't need to be
4381 * done at any specific time, so do this out of our fast path
4382 * to make resume and init faster.
4384 schedule_delayed_work(&dev_priv->rps.delayed_resume_work,
4385 round_jiffies_up_relative(HZ));
4389 static void ibx_init_clock_gating(struct drm_device *dev)
4391 struct drm_i915_private *dev_priv = dev->dev_private;
4394 * On Ibex Peak and Cougar Point, we need to disable clock
4395 * gating for the panel power sequencer or it will fail to
4396 * start up when no ports are active.
4398 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
4401 static void g4x_disable_trickle_feed(struct drm_device *dev)
4403 struct drm_i915_private *dev_priv = dev->dev_private;
4406 for_each_pipe(pipe) {
4407 I915_WRITE(DSPCNTR(pipe),
4408 I915_READ(DSPCNTR(pipe)) |
4409 DISPPLANE_TRICKLE_FEED_DISABLE);
4410 intel_flush_display_plane(dev_priv, pipe);
4414 static void ironlake_init_clock_gating(struct drm_device *dev)
4416 struct drm_i915_private *dev_priv = dev->dev_private;
4417 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
4419 /* Required for FBC */
4420 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
4421 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
4422 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
4424 I915_WRITE(PCH_3DCGDIS0,
4425 MARIUNIT_CLOCK_GATE_DISABLE |
4426 SVSMUNIT_CLOCK_GATE_DISABLE);
4427 I915_WRITE(PCH_3DCGDIS1,
4428 VFMUNIT_CLOCK_GATE_DISABLE);
4431 * According to the spec the following bits should be set in
4432 * order to enable memory self-refresh
4433 * The bit 22/21 of 0x42004
4434 * The bit 5 of 0x42020
4435 * The bit 15 of 0x45000
4437 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4438 (I915_READ(ILK_DISPLAY_CHICKEN2) |
4439 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
4440 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
4441 I915_WRITE(DISP_ARB_CTL,
4442 (I915_READ(DISP_ARB_CTL) |
4444 I915_WRITE(WM3_LP_ILK, 0);
4445 I915_WRITE(WM2_LP_ILK, 0);
4446 I915_WRITE(WM1_LP_ILK, 0);
4449 * Based on the document from hardware guys the following bits
4450 * should be set unconditionally in order to enable FBC.
4451 * The bit 22 of 0x42000
4452 * The bit 22 of 0x42004
4453 * The bit 7,8,9 of 0x42020.
4455 if (IS_IRONLAKE_M(dev)) {
4456 I915_WRITE(ILK_DISPLAY_CHICKEN1,
4457 I915_READ(ILK_DISPLAY_CHICKEN1) |
4459 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4460 I915_READ(ILK_DISPLAY_CHICKEN2) |
4464 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
4466 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4467 I915_READ(ILK_DISPLAY_CHICKEN2) |
4468 ILK_ELPIN_409_SELECT);
4469 I915_WRITE(_3D_CHICKEN2,
4470 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
4471 _3D_CHICKEN2_WM_READ_PIPELINED);
4473 /* WaDisableRenderCachePipelinedFlush:ilk */
4474 I915_WRITE(CACHE_MODE_0,
4475 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
4477 g4x_disable_trickle_feed(dev);
4479 ibx_init_clock_gating(dev);
4482 static void cpt_init_clock_gating(struct drm_device *dev)
4484 struct drm_i915_private *dev_priv = dev->dev_private;
4489 * On Ibex Peak and Cougar Point, we need to disable clock
4490 * gating for the panel power sequencer or it will fail to
4491 * start up when no ports are active.
4493 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
4494 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
4495 DPLS_EDP_PPS_FIX_DIS);
4496 /* The below fixes the weird display corruption, a few pixels shifted
4497 * downward, on (only) LVDS of some HP laptops with IVY.
4499 for_each_pipe(pipe) {
4500 val = I915_READ(TRANS_CHICKEN2(pipe));
4501 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
4502 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
4503 if (dev_priv->vbt.fdi_rx_polarity_inverted)
4504 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
4505 val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
4506 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
4507 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
4508 I915_WRITE(TRANS_CHICKEN2(pipe), val);
4510 /* WADP0ClockGatingDisable */
4511 for_each_pipe(pipe) {
4512 I915_WRITE(TRANS_CHICKEN1(pipe),
4513 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
4517 static void gen6_check_mch_setup(struct drm_device *dev)
4519 struct drm_i915_private *dev_priv = dev->dev_private;
4522 tmp = I915_READ(MCH_SSKPD);
4523 if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) {
4524 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp);
4525 DRM_INFO("This can cause pipe underruns and display issues.\n");
4526 DRM_INFO("Please upgrade your BIOS to fix this.\n");
4530 static void gen6_init_clock_gating(struct drm_device *dev)
4532 struct drm_i915_private *dev_priv = dev->dev_private;
4533 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
4535 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
4537 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4538 I915_READ(ILK_DISPLAY_CHICKEN2) |
4539 ILK_ELPIN_409_SELECT);
4541 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
4542 I915_WRITE(_3D_CHICKEN,
4543 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
4545 /* WaSetupGtModeTdRowDispatch:snb */
4546 if (IS_SNB_GT1(dev))
4547 I915_WRITE(GEN6_GT_MODE,
4548 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE));
4550 I915_WRITE(WM3_LP_ILK, 0);
4551 I915_WRITE(WM2_LP_ILK, 0);
4552 I915_WRITE(WM1_LP_ILK, 0);
4554 I915_WRITE(CACHE_MODE_0,
4555 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
4557 I915_WRITE(GEN6_UCGCTL1,
4558 I915_READ(GEN6_UCGCTL1) |
4559 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
4560 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
4562 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4563 * gating disable must be set. Failure to set it results in
4564 * flickering pixels due to Z write ordering failures after
4565 * some amount of runtime in the Mesa "fire" demo, and Unigine
4566 * Sanctuary and Tropics, and apparently anything else with
4567 * alpha test or pixel discard.
4569 * According to the spec, bit 11 (RCCUNIT) must also be set,
4570 * but we didn't debug actual testcases to find it out.
4572 * Also apply WaDisableVDSUnitClockGating:snb and
4573 * WaDisableRCPBUnitClockGating:snb.
4575 I915_WRITE(GEN6_UCGCTL2,
4576 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
4577 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
4578 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4580 /* Bspec says we need to always set all mask bits. */
4581 I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) |
4582 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL);
4585 * According to the spec the following bits should be
4586 * set in order to enable memory self-refresh and fbc:
4587 * The bit21 and bit22 of 0x42000
4588 * The bit21 and bit22 of 0x42004
4589 * The bit5 and bit7 of 0x42020
4590 * The bit14 of 0x70180
4591 * The bit14 of 0x71180
4593 I915_WRITE(ILK_DISPLAY_CHICKEN1,
4594 I915_READ(ILK_DISPLAY_CHICKEN1) |
4595 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
4596 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4597 I915_READ(ILK_DISPLAY_CHICKEN2) |
4598 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
4599 I915_WRITE(ILK_DSPCLK_GATE_D,
4600 I915_READ(ILK_DSPCLK_GATE_D) |
4601 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
4602 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
4604 /* WaMbcDriverBootEnable:snb */
4605 I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) |
4606 GEN6_MBCTL_ENABLE_BOOT_FETCH);
4608 g4x_disable_trickle_feed(dev);
4610 /* The default value should be 0x200 according to docs, but the two
4611 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
4612 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff));
4613 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI));
4615 cpt_init_clock_gating(dev);
4617 gen6_check_mch_setup(dev);
4620 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
4622 uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
4624 reg &= ~GEN7_FF_SCHED_MASK;
4625 reg |= GEN7_FF_TS_SCHED_HW;
4626 reg |= GEN7_FF_VS_SCHED_HW;
4627 reg |= GEN7_FF_DS_SCHED_HW;
4629 if (IS_HASWELL(dev_priv->dev))
4630 reg &= ~GEN7_FF_VS_REF_CNT_FFME;
4632 I915_WRITE(GEN7_FF_THREAD_MODE, reg);
4635 static void lpt_init_clock_gating(struct drm_device *dev)
4637 struct drm_i915_private *dev_priv = dev->dev_private;
4640 * TODO: this bit should only be enabled when really needed, then
4641 * disabled when not needed anymore in order to save power.
4643 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
4644 I915_WRITE(SOUTH_DSPCLK_GATE_D,
4645 I915_READ(SOUTH_DSPCLK_GATE_D) |
4646 PCH_LP_PARTITION_LEVEL_DISABLE);
4648 /* WADPOClockGatingDisable:hsw */
4649 I915_WRITE(_TRANSA_CHICKEN1,
4650 I915_READ(_TRANSA_CHICKEN1) |
4651 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
4654 static void lpt_suspend_hw(struct drm_device *dev)
4656 struct drm_i915_private *dev_priv = dev->dev_private;
4658 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
4659 uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
4661 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
4662 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
4666 static void haswell_init_clock_gating(struct drm_device *dev)
4668 struct drm_i915_private *dev_priv = dev->dev_private;
4670 I915_WRITE(WM3_LP_ILK, 0);
4671 I915_WRITE(WM2_LP_ILK, 0);
4672 I915_WRITE(WM1_LP_ILK, 0);
4674 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4675 * This implements the WaDisableRCZUnitClockGating:hsw workaround.
4677 I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
4679 /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */
4680 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4681 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4683 /* WaApplyL3ControlAndL3ChickenMode:hsw */
4684 I915_WRITE(GEN7_L3CNTLREG1,
4685 GEN7_WA_FOR_GEN7_L3_CONTROL);
4686 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
4687 GEN7_WA_L3_CHICKEN_MODE);
4689 /* This is required by WaCatErrorRejectionIssue:hsw */
4690 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4691 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4692 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4694 g4x_disable_trickle_feed(dev);
4696 /* WaVSRefCountFullforceMissDisable:hsw */
4697 gen7_setup_fixed_func_scheduler(dev_priv);
4699 /* WaDisable4x2SubspanOptimization:hsw */
4700 I915_WRITE(CACHE_MODE_1,
4701 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4703 /* WaMbcDriverBootEnable:hsw */
4704 I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) |
4705 GEN6_MBCTL_ENABLE_BOOT_FETCH);
4707 /* WaSwitchSolVfFArbitrationPriority:hsw */
4708 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
4710 /* WaRsPkgCStateDisplayPMReq:hsw */
4711 I915_WRITE(CHICKEN_PAR1_1,
4712 I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
4714 lpt_init_clock_gating(dev);
4717 static void ivybridge_init_clock_gating(struct drm_device *dev)
4719 struct drm_i915_private *dev_priv = dev->dev_private;
4722 I915_WRITE(WM3_LP_ILK, 0);
4723 I915_WRITE(WM2_LP_ILK, 0);
4724 I915_WRITE(WM1_LP_ILK, 0);
4726 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
4728 /* WaDisableEarlyCull:ivb */
4729 I915_WRITE(_3D_CHICKEN3,
4730 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
4732 /* WaDisableBackToBackFlipFix:ivb */
4733 I915_WRITE(IVB_CHICKEN3,
4734 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
4735 CHICKEN3_DGMG_DONE_FIX_DISABLE);
4737 /* WaDisablePSDDualDispatchEnable:ivb */
4738 if (IS_IVB_GT1(dev))
4739 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4740 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4742 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2,
4743 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4745 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
4746 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4747 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4749 /* WaApplyL3ControlAndL3ChickenMode:ivb */
4750 I915_WRITE(GEN7_L3CNTLREG1,
4751 GEN7_WA_FOR_GEN7_L3_CONTROL);
4752 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
4753 GEN7_WA_L3_CHICKEN_MODE);
4754 if (IS_IVB_GT1(dev))
4755 I915_WRITE(GEN7_ROW_CHICKEN2,
4756 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4758 I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
4759 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4762 /* WaForceL3Serialization:ivb */
4763 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
4764 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
4766 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4767 * gating disable must be set. Failure to set it results in
4768 * flickering pixels due to Z write ordering failures after
4769 * some amount of runtime in the Mesa "fire" demo, and Unigine
4770 * Sanctuary and Tropics, and apparently anything else with
4771 * alpha test or pixel discard.
4773 * According to the spec, bit 11 (RCCUNIT) must also be set,
4774 * but we didn't debug actual testcases to find it out.
4776 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4777 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
4779 I915_WRITE(GEN6_UCGCTL2,
4780 GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
4781 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4783 /* This is required by WaCatErrorRejectionIssue:ivb */
4784 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4785 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4786 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4788 g4x_disable_trickle_feed(dev);
4790 /* WaMbcDriverBootEnable:ivb */
4791 I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) |
4792 GEN6_MBCTL_ENABLE_BOOT_FETCH);
4794 /* WaVSRefCountFullforceMissDisable:ivb */
4795 gen7_setup_fixed_func_scheduler(dev_priv);
4797 /* WaDisable4x2SubspanOptimization:ivb */
4798 I915_WRITE(CACHE_MODE_1,
4799 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4801 snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
4802 snpcr &= ~GEN6_MBC_SNPCR_MASK;
4803 snpcr |= GEN6_MBC_SNPCR_MED;
4804 I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
4806 if (!HAS_PCH_NOP(dev))
4807 cpt_init_clock_gating(dev);
4809 gen6_check_mch_setup(dev);
4812 static void valleyview_init_clock_gating(struct drm_device *dev)
4814 struct drm_i915_private *dev_priv = dev->dev_private;
4816 I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
4818 /* WaDisableEarlyCull:vlv */
4819 I915_WRITE(_3D_CHICKEN3,
4820 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
4822 /* WaDisableBackToBackFlipFix:vlv */
4823 I915_WRITE(IVB_CHICKEN3,
4824 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
4825 CHICKEN3_DGMG_DONE_FIX_DISABLE);
4827 /* WaDisablePSDDualDispatchEnable:vlv */
4828 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4829 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP |
4830 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4832 /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */
4833 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4834 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4836 /* WaApplyL3ControlAndL3ChickenMode:vlv */
4837 I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS);
4838 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE);
4840 /* WaForceL3Serialization:vlv */
4841 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
4842 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
4844 /* WaDisableDopClockGating:vlv */
4845 I915_WRITE(GEN7_ROW_CHICKEN2,
4846 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4848 /* This is required by WaCatErrorRejectionIssue:vlv */
4849 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4850 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4851 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4853 /* WaMbcDriverBootEnable:vlv */
4854 I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) |
4855 GEN6_MBCTL_ENABLE_BOOT_FETCH);
4858 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4859 * gating disable must be set. Failure to set it results in
4860 * flickering pixels due to Z write ordering failures after
4861 * some amount of runtime in the Mesa "fire" demo, and Unigine
4862 * Sanctuary and Tropics, and apparently anything else with
4863 * alpha test or pixel discard.
4865 * According to the spec, bit 11 (RCCUNIT) must also be set,
4866 * but we didn't debug actual testcases to find it out.
4868 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4869 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
4871 * Also apply WaDisableVDSUnitClockGating:vlv and
4872 * WaDisableRCPBUnitClockGating:vlv.
4874 I915_WRITE(GEN6_UCGCTL2,
4875 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
4876 GEN7_TDLUNIT_CLOCK_GATE_DISABLE |
4877 GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
4878 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
4879 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4881 I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
4883 I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
4885 I915_WRITE(CACHE_MODE_1,
4886 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4889 * WaDisableVLVClockGating_VBIIssue:vlv
4890 * Disable clock gating on th GCFG unit to prevent a delay
4891 * in the reporting of vblank events.
4893 I915_WRITE(VLV_GUNIT_CLOCK_GATE, 0xffffffff);
4895 /* Conservative clock gating settings for now */
4896 I915_WRITE(0x9400, 0xffffffff);
4897 I915_WRITE(0x9404, 0xffffffff);
4898 I915_WRITE(0x9408, 0xffffffff);
4899 I915_WRITE(0x940c, 0xffffffff);
4900 I915_WRITE(0x9410, 0xffffffff);
4901 I915_WRITE(0x9414, 0xffffffff);
4902 I915_WRITE(0x9418, 0xffffffff);
4905 static void g4x_init_clock_gating(struct drm_device *dev)
4907 struct drm_i915_private *dev_priv = dev->dev_private;
4908 uint32_t dspclk_gate;
4910 I915_WRITE(RENCLK_GATE_D1, 0);
4911 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
4912 GS_UNIT_CLOCK_GATE_DISABLE |
4913 CL_UNIT_CLOCK_GATE_DISABLE);
4914 I915_WRITE(RAMCLK_GATE_D, 0);
4915 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
4916 OVRUNIT_CLOCK_GATE_DISABLE |
4917 OVCUNIT_CLOCK_GATE_DISABLE;
4919 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
4920 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
4922 /* WaDisableRenderCachePipelinedFlush */
4923 I915_WRITE(CACHE_MODE_0,
4924 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
4926 g4x_disable_trickle_feed(dev);
4929 static void crestline_init_clock_gating(struct drm_device *dev)
4931 struct drm_i915_private *dev_priv = dev->dev_private;
4933 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
4934 I915_WRITE(RENCLK_GATE_D2, 0);
4935 I915_WRITE(DSPCLK_GATE_D, 0);
4936 I915_WRITE(RAMCLK_GATE_D, 0);
4937 I915_WRITE16(DEUC, 0);
4938 I915_WRITE(MI_ARB_STATE,
4939 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
4942 static void broadwater_init_clock_gating(struct drm_device *dev)
4944 struct drm_i915_private *dev_priv = dev->dev_private;
4946 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
4947 I965_RCC_CLOCK_GATE_DISABLE |
4948 I965_RCPB_CLOCK_GATE_DISABLE |
4949 I965_ISC_CLOCK_GATE_DISABLE |
4950 I965_FBC_CLOCK_GATE_DISABLE);
4951 I915_WRITE(RENCLK_GATE_D2, 0);
4952 I915_WRITE(MI_ARB_STATE,
4953 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
4956 static void gen3_init_clock_gating(struct drm_device *dev)
4958 struct drm_i915_private *dev_priv = dev->dev_private;
4959 u32 dstate = I915_READ(D_STATE);
4961 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
4962 DSTATE_DOT_CLOCK_GATING;
4963 I915_WRITE(D_STATE, dstate);
4965 if (IS_PINEVIEW(dev))
4966 I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
4968 /* IIR "flip pending" means done if this bit is set */
4969 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
4972 static void i85x_init_clock_gating(struct drm_device *dev)
4974 struct drm_i915_private *dev_priv = dev->dev_private;
4976 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
4979 static void i830_init_clock_gating(struct drm_device *dev)
4981 struct drm_i915_private *dev_priv = dev->dev_private;
4983 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
4986 void intel_init_clock_gating(struct drm_device *dev)
4988 struct drm_i915_private *dev_priv = dev->dev_private;
4990 dev_priv->display.init_clock_gating(dev);
4993 void intel_suspend_hw(struct drm_device *dev)
4995 if (HAS_PCH_LPT(dev))
4996 lpt_suspend_hw(dev);
5000 * We should only use the power well if we explicitly asked the hardware to
5001 * enable it, so check if it's enabled and also check if we've requested it to
5004 bool intel_display_power_enabled(struct drm_device *dev,
5005 enum intel_display_power_domain domain)
5007 struct drm_i915_private *dev_priv = dev->dev_private;
5009 if (!HAS_POWER_WELL(dev))
5013 case POWER_DOMAIN_PIPE_A:
5014 case POWER_DOMAIN_TRANSCODER_EDP:
5016 case POWER_DOMAIN_PIPE_B:
5017 case POWER_DOMAIN_PIPE_C:
5018 case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
5019 case POWER_DOMAIN_PIPE_B_PANEL_FITTER:
5020 case POWER_DOMAIN_PIPE_C_PANEL_FITTER:
5021 case POWER_DOMAIN_TRANSCODER_A:
5022 case POWER_DOMAIN_TRANSCODER_B:
5023 case POWER_DOMAIN_TRANSCODER_C:
5024 return I915_READ(HSW_PWR_WELL_DRIVER) ==
5025 (HSW_PWR_WELL_ENABLE | HSW_PWR_WELL_STATE);
5031 static void __intel_set_power_well(struct drm_device *dev, bool enable)
5033 struct drm_i915_private *dev_priv = dev->dev_private;
5034 bool is_enabled, enable_requested;
5037 tmp = I915_READ(HSW_PWR_WELL_DRIVER);
5038 is_enabled = tmp & HSW_PWR_WELL_STATE;
5039 enable_requested = tmp & HSW_PWR_WELL_ENABLE;
5042 if (!enable_requested)
5043 I915_WRITE(HSW_PWR_WELL_DRIVER, HSW_PWR_WELL_ENABLE);
5046 DRM_DEBUG_KMS("Enabling power well\n");
5047 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
5048 HSW_PWR_WELL_STATE), 20))
5049 DRM_ERROR("Timeout enabling power well\n");
5052 if (enable_requested) {
5053 I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
5054 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5059 static struct i915_power_well *hsw_pwr;
5061 /* Display audio driver power well request */
5062 void i915_request_power_well(void)
5064 if (WARN_ON(!hsw_pwr))
5067 spin_lock_irq(&hsw_pwr->lock);
5068 if (!hsw_pwr->count++ &&
5069 !hsw_pwr->i915_request)
5070 __intel_set_power_well(hsw_pwr->device, true);
5071 spin_unlock_irq(&hsw_pwr->lock);
5073 EXPORT_SYMBOL_GPL(i915_request_power_well);
5075 /* Display audio driver power well release */
5076 void i915_release_power_well(void)
5078 if (WARN_ON(!hsw_pwr))
5081 spin_lock_irq(&hsw_pwr->lock);
5082 WARN_ON(!hsw_pwr->count);
5083 if (!--hsw_pwr->count &&
5084 !hsw_pwr->i915_request)
5085 __intel_set_power_well(hsw_pwr->device, false);
5086 spin_unlock_irq(&hsw_pwr->lock);
5088 EXPORT_SYMBOL_GPL(i915_release_power_well);
5090 int i915_init_power_well(struct drm_device *dev)
5092 struct drm_i915_private *dev_priv = dev->dev_private;
5094 hsw_pwr = &dev_priv->power_well;
5096 hsw_pwr->device = dev;
5097 spin_lock_init(&hsw_pwr->lock);
5103 void i915_remove_power_well(struct drm_device *dev)
5108 void intel_set_power_well(struct drm_device *dev, bool enable)
5110 struct drm_i915_private *dev_priv = dev->dev_private;
5111 struct i915_power_well *power_well = &dev_priv->power_well;
5113 if (!HAS_POWER_WELL(dev))
5116 if (!i915_disable_power_well && !enable)
5119 spin_lock_irq(&power_well->lock);
5120 power_well->i915_request = enable;
5122 /* only reject "disable" power well request */
5123 if (power_well->count && !enable) {
5124 spin_unlock_irq(&power_well->lock);
5128 __intel_set_power_well(dev, enable);
5129 spin_unlock_irq(&power_well->lock);
5133 * Starting with Haswell, we have a "Power Down Well" that can be turned off
5134 * when not needed anymore. We have 4 registers that can request the power well
5135 * to be enabled, and it will only be disabled if none of the registers is
5136 * requesting it to be enabled.
5138 void intel_init_power_well(struct drm_device *dev)
5140 struct drm_i915_private *dev_priv = dev->dev_private;
5142 if (!HAS_POWER_WELL(dev))
5145 /* For now, we need the power well to be always enabled. */
5146 intel_set_power_well(dev, true);
5148 /* We're taking over the BIOS, so clear any requests made by it since
5149 * the driver is in charge now. */
5150 if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE)
5151 I915_WRITE(HSW_PWR_WELL_BIOS, 0);
5154 /* Set up chip specific power management-related functions */
5155 void intel_init_pm(struct drm_device *dev)
5157 struct drm_i915_private *dev_priv = dev->dev_private;
5159 if (I915_HAS_FBC(dev)) {
5160 if (HAS_PCH_SPLIT(dev)) {
5161 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5162 if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
5163 dev_priv->display.enable_fbc =
5166 dev_priv->display.enable_fbc =
5167 ironlake_enable_fbc;
5168 dev_priv->display.disable_fbc = ironlake_disable_fbc;
5169 } else if (IS_GM45(dev)) {
5170 dev_priv->display.fbc_enabled = g4x_fbc_enabled;
5171 dev_priv->display.enable_fbc = g4x_enable_fbc;
5172 dev_priv->display.disable_fbc = g4x_disable_fbc;
5173 } else if (IS_CRESTLINE(dev)) {
5174 dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
5175 dev_priv->display.enable_fbc = i8xx_enable_fbc;
5176 dev_priv->display.disable_fbc = i8xx_disable_fbc;
5178 /* 855GM needs testing */
5182 if (IS_PINEVIEW(dev))
5183 i915_pineview_get_mem_freq(dev);
5184 else if (IS_GEN5(dev))
5185 i915_ironlake_get_mem_freq(dev);
5187 /* For FIFO watermark updates */
5188 if (HAS_PCH_SPLIT(dev)) {
5190 if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK)
5191 dev_priv->display.update_wm = ironlake_update_wm;
5193 DRM_DEBUG_KMS("Failed to get proper latency. "
5195 dev_priv->display.update_wm = NULL;
5197 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
5198 } else if (IS_GEN6(dev)) {
5199 if (SNB_READ_WM0_LATENCY()) {
5200 dev_priv->display.update_wm = sandybridge_update_wm;
5201 dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm;
5203 DRM_DEBUG_KMS("Failed to read display plane latency. "
5205 dev_priv->display.update_wm = NULL;
5207 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
5208 } else if (IS_IVYBRIDGE(dev)) {
5209 if (SNB_READ_WM0_LATENCY()) {
5210 dev_priv->display.update_wm = ivybridge_update_wm;
5211 dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm;
5213 DRM_DEBUG_KMS("Failed to read display plane latency. "
5215 dev_priv->display.update_wm = NULL;
5217 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
5218 } else if (IS_HASWELL(dev)) {
5219 if (I915_READ64(MCH_SSKPD)) {
5220 dev_priv->display.update_wm = haswell_update_wm;
5221 dev_priv->display.update_sprite_wm =
5222 haswell_update_sprite_wm;
5224 DRM_DEBUG_KMS("Failed to read display plane latency. "
5226 dev_priv->display.update_wm = NULL;
5228 dev_priv->display.init_clock_gating = haswell_init_clock_gating;
5230 dev_priv->display.update_wm = NULL;
5231 } else if (IS_VALLEYVIEW(dev)) {
5232 dev_priv->display.update_wm = valleyview_update_wm;
5233 dev_priv->display.init_clock_gating =
5234 valleyview_init_clock_gating;
5235 } else if (IS_PINEVIEW(dev)) {
5236 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
5239 dev_priv->mem_freq)) {
5240 DRM_INFO("failed to find known CxSR latency "
5241 "(found ddr%s fsb freq %d, mem freq %d), "
5243 (dev_priv->is_ddr3 == 1) ? "3" : "2",
5244 dev_priv->fsb_freq, dev_priv->mem_freq);
5245 /* Disable CxSR and never update its watermark again */
5246 pineview_disable_cxsr(dev);
5247 dev_priv->display.update_wm = NULL;
5249 dev_priv->display.update_wm = pineview_update_wm;
5250 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
5251 } else if (IS_G4X(dev)) {
5252 dev_priv->display.update_wm = g4x_update_wm;
5253 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
5254 } else if (IS_GEN4(dev)) {
5255 dev_priv->display.update_wm = i965_update_wm;
5256 if (IS_CRESTLINE(dev))
5257 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
5258 else if (IS_BROADWATER(dev))
5259 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
5260 } else if (IS_GEN3(dev)) {
5261 dev_priv->display.update_wm = i9xx_update_wm;
5262 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
5263 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
5264 } else if (IS_I865G(dev)) {
5265 dev_priv->display.update_wm = i830_update_wm;
5266 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
5267 dev_priv->display.get_fifo_size = i830_get_fifo_size;
5268 } else if (IS_I85X(dev)) {
5269 dev_priv->display.update_wm = i9xx_update_wm;
5270 dev_priv->display.get_fifo_size = i85x_get_fifo_size;
5271 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
5273 dev_priv->display.update_wm = i830_update_wm;
5274 dev_priv->display.init_clock_gating = i830_init_clock_gating;
5276 dev_priv->display.get_fifo_size = i845_get_fifo_size;
5278 dev_priv->display.get_fifo_size = i830_get_fifo_size;
5282 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
5284 u32 gt_thread_status_mask;
5286 if (IS_HASWELL(dev_priv->dev))
5287 gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW;
5289 gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK;
5291 /* w/a for a sporadic read returning 0 by waiting for the GT
5292 * thread to wake up.
5294 if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500))
5295 DRM_ERROR("GT thread status wait timed out\n");
5298 static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
5300 I915_WRITE_NOTRACE(FORCEWAKE, 0);
5301 POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
5304 static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
5306 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0,
5307 FORCEWAKE_ACK_TIMEOUT_MS))
5308 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
5310 I915_WRITE_NOTRACE(FORCEWAKE, 1);
5311 POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
5313 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1),
5314 FORCEWAKE_ACK_TIMEOUT_MS))
5315 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
5317 /* WaRsForcewakeWaitTC0:snb */
5318 __gen6_gt_wait_for_thread_c0(dev_priv);
5321 static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
5323 I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
5324 /* something from same cacheline, but !FORCEWAKE_MT */
5325 POSTING_READ(ECOBUS);
5328 static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
5332 if (IS_HASWELL(dev_priv->dev))
5333 forcewake_ack = FORCEWAKE_ACK_HSW;
5335 forcewake_ack = FORCEWAKE_MT_ACK;
5337 if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL) == 0,
5338 FORCEWAKE_ACK_TIMEOUT_MS))
5339 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
5341 I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
5342 /* something from same cacheline, but !FORCEWAKE_MT */
5343 POSTING_READ(ECOBUS);
5345 if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL),
5346 FORCEWAKE_ACK_TIMEOUT_MS))
5347 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
5349 /* WaRsForcewakeWaitTC0:ivb,hsw */
5350 __gen6_gt_wait_for_thread_c0(dev_priv);
5354 * Generally this is called implicitly by the register read function. However,
5355 * if some sequence requires the GT to not power down then this function should
5356 * be called at the beginning of the sequence followed by a call to
5357 * gen6_gt_force_wake_put() at the end of the sequence.
5359 void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
5361 unsigned long irqflags;
5363 spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
5364 if (dev_priv->forcewake_count++ == 0)
5365 dev_priv->gt.force_wake_get(dev_priv);
5366 spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
5369 void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
5372 gtfifodbg = I915_READ_NOTRACE(GTFIFODBG);
5373 if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK,
5374 "MMIO read or write has been dropped %x\n", gtfifodbg))
5375 I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK);
5378 static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
5380 I915_WRITE_NOTRACE(FORCEWAKE, 0);
5381 /* something from same cacheline, but !FORCEWAKE */
5382 POSTING_READ(ECOBUS);
5383 gen6_gt_check_fifodbg(dev_priv);
5386 static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv)
5388 I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
5389 /* something from same cacheline, but !FORCEWAKE_MT */
5390 POSTING_READ(ECOBUS);
5391 gen6_gt_check_fifodbg(dev_priv);
5395 * see gen6_gt_force_wake_get()
5397 void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
5399 unsigned long irqflags;
5401 spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
5402 if (--dev_priv->forcewake_count == 0)
5403 dev_priv->gt.force_wake_put(dev_priv);
5404 spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
5407 int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
5411 if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
5413 u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
5414 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
5416 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
5418 if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
5420 dev_priv->gt_fifo_count = fifo;
5422 dev_priv->gt_fifo_count--;
5427 static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
5429 I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff));
5430 /* something from same cacheline, but !FORCEWAKE_VLV */
5431 POSTING_READ(FORCEWAKE_ACK_VLV);
5434 static void vlv_force_wake_get(struct drm_i915_private *dev_priv)
5436 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL) == 0,
5437 FORCEWAKE_ACK_TIMEOUT_MS))
5438 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
5440 I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
5441 I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV,
5442 _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
5444 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL),
5445 FORCEWAKE_ACK_TIMEOUT_MS))
5446 DRM_ERROR("Timed out waiting for GT to ack forcewake request.\n");
5448 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_MEDIA_VLV) &
5450 FORCEWAKE_ACK_TIMEOUT_MS))
5451 DRM_ERROR("Timed out waiting for media to ack forcewake request.\n");
5453 /* WaRsForcewakeWaitTC0:vlv */
5454 __gen6_gt_wait_for_thread_c0(dev_priv);
5457 static void vlv_force_wake_put(struct drm_i915_private *dev_priv)
5459 I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
5460 I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV,
5461 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
5462 /* The below doubles as a POSTING_READ */
5463 gen6_gt_check_fifodbg(dev_priv);
5466 void intel_gt_reset(struct drm_device *dev)
5468 struct drm_i915_private *dev_priv = dev->dev_private;
5470 if (IS_VALLEYVIEW(dev)) {
5471 vlv_force_wake_reset(dev_priv);
5472 } else if (INTEL_INFO(dev)->gen >= 6) {
5473 __gen6_gt_force_wake_reset(dev_priv);
5474 if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
5475 __gen6_gt_force_wake_mt_reset(dev_priv);
5479 void intel_gt_init(struct drm_device *dev)
5481 struct drm_i915_private *dev_priv = dev->dev_private;
5483 spin_lock_init(&dev_priv->gt_lock);
5485 intel_gt_reset(dev);
5487 if (IS_VALLEYVIEW(dev)) {
5488 dev_priv->gt.force_wake_get = vlv_force_wake_get;
5489 dev_priv->gt.force_wake_put = vlv_force_wake_put;
5490 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
5491 dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get;
5492 dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put;
5493 } else if (IS_GEN6(dev)) {
5494 dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get;
5495 dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put;
5497 INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
5498 intel_gen6_powersave_work);
5501 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
5503 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5505 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
5506 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
5510 I915_WRITE(GEN6_PCODE_DATA, *val);
5511 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
5513 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
5515 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
5519 *val = I915_READ(GEN6_PCODE_DATA);
5520 I915_WRITE(GEN6_PCODE_DATA, 0);
5525 int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
5527 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5529 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
5530 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
5534 I915_WRITE(GEN6_PCODE_DATA, val);
5535 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
5537 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
5539 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
5543 I915_WRITE(GEN6_PCODE_DATA, 0);
5548 int vlv_gpu_freq(int ddr_freq, int val)
5569 return ((val - 0xbd) * mult) + base;
5572 int vlv_freq_opcode(int ddr_freq, int val)