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>
29 #include "intel_drv.h"
32 #define FORCEWAKE_ACK_TIMEOUT_MS 2
34 void i8xx_disable_fbc(struct drm_device *dev)
36 struct drm_i915_private *dev_priv = dev->dev_private;
39 /* Disable compression */
40 fbc_ctl = I915_READ(FBC_CONTROL);
41 if ((fbc_ctl & FBC_CTL_EN) == 0)
44 fbc_ctl &= ~FBC_CTL_EN;
45 I915_WRITE(FBC_CONTROL, fbc_ctl);
47 /* Wait for compressing bit to clear */
48 if (_intel_wait_for(dev,
49 (I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10,
51 DRM_DEBUG_KMS("FBC idle timed out\n");
55 DRM_DEBUG_KMS("disabled FBC\n");
58 void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
60 struct drm_device *dev = crtc->dev;
61 struct drm_i915_private *dev_priv = dev->dev_private;
62 struct drm_framebuffer *fb = crtc->fb;
63 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
64 struct drm_i915_gem_object *obj = intel_fb->obj;
65 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
68 u32 fbc_ctl, fbc_ctl2;
70 cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE;
71 if (fb->pitches[0] < cfb_pitch)
72 cfb_pitch = fb->pitches[0];
74 /* FBC_CTL wants 64B units */
75 cfb_pitch = (cfb_pitch / 64) - 1;
76 plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
79 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
80 I915_WRITE(FBC_TAG + (i * 4), 0);
83 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
85 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
86 I915_WRITE(FBC_FENCE_OFF, crtc->y);
89 fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
91 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
92 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
93 fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
94 fbc_ctl |= obj->fence_reg;
95 I915_WRITE(FBC_CONTROL, fbc_ctl);
97 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %d, ",
98 cfb_pitch, crtc->y, intel_crtc->plane);
101 bool i8xx_fbc_enabled(struct drm_device *dev)
103 struct drm_i915_private *dev_priv = dev->dev_private;
105 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
108 void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
110 struct drm_device *dev = crtc->dev;
111 struct drm_i915_private *dev_priv = dev->dev_private;
112 struct drm_framebuffer *fb = crtc->fb;
113 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
114 struct drm_i915_gem_object *obj = intel_fb->obj;
115 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
116 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
117 unsigned long stall_watermark = 200;
120 dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
121 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
122 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
124 I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
125 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
126 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
127 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
130 I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
132 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
135 void g4x_disable_fbc(struct drm_device *dev)
137 struct drm_i915_private *dev_priv = dev->dev_private;
140 /* Disable compression */
141 dpfc_ctl = I915_READ(DPFC_CONTROL);
142 if (dpfc_ctl & DPFC_CTL_EN) {
143 dpfc_ctl &= ~DPFC_CTL_EN;
144 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
146 DRM_DEBUG_KMS("disabled FBC\n");
150 bool g4x_fbc_enabled(struct drm_device *dev)
152 struct drm_i915_private *dev_priv = dev->dev_private;
154 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
157 static void sandybridge_blit_fbc_update(struct drm_device *dev)
159 struct drm_i915_private *dev_priv = dev->dev_private;
162 /* Make sure blitter notifies FBC of writes */
163 gen6_gt_force_wake_get(dev_priv);
164 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
165 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
166 GEN6_BLITTER_LOCK_SHIFT;
167 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
168 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
169 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
170 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
171 GEN6_BLITTER_LOCK_SHIFT);
172 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
173 POSTING_READ(GEN6_BLITTER_ECOSKPD);
174 gen6_gt_force_wake_put(dev_priv);
177 void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
179 struct drm_device *dev = crtc->dev;
180 struct drm_i915_private *dev_priv = dev->dev_private;
181 struct drm_framebuffer *fb = crtc->fb;
182 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
183 struct drm_i915_gem_object *obj = intel_fb->obj;
184 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
185 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
186 unsigned long stall_watermark = 200;
189 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
190 dpfc_ctl &= DPFC_RESERVED;
191 dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
192 /* Set persistent mode for front-buffer rendering, ala X. */
193 dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE;
194 dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg);
195 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
197 I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
198 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
199 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
200 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
201 I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID);
203 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
206 I915_WRITE(SNB_DPFC_CTL_SA,
207 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
208 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
209 sandybridge_blit_fbc_update(dev);
212 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
215 void ironlake_disable_fbc(struct drm_device *dev)
217 struct drm_i915_private *dev_priv = dev->dev_private;
220 /* Disable compression */
221 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
222 if (dpfc_ctl & DPFC_CTL_EN) {
223 dpfc_ctl &= ~DPFC_CTL_EN;
224 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
226 DRM_DEBUG_KMS("disabled FBC\n");
230 bool ironlake_fbc_enabled(struct drm_device *dev)
232 struct drm_i915_private *dev_priv = dev->dev_private;
234 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
237 bool intel_fbc_enabled(struct drm_device *dev)
239 struct drm_i915_private *dev_priv = dev->dev_private;
241 if (!dev_priv->display.fbc_enabled)
244 return dev_priv->display.fbc_enabled(dev);
247 static void intel_fbc_work_fn(struct work_struct *__work)
249 struct intel_fbc_work *work =
250 container_of(to_delayed_work(__work),
251 struct intel_fbc_work, work);
252 struct drm_device *dev = work->crtc->dev;
253 struct drm_i915_private *dev_priv = dev->dev_private;
256 if (work == dev_priv->fbc_work) {
257 /* Double check that we haven't switched fb without cancelling
260 if (work->crtc->fb == work->fb) {
261 dev_priv->display.enable_fbc(work->crtc,
264 dev_priv->cfb_plane = to_intel_crtc(work->crtc)->plane;
265 dev_priv->cfb_fb = work->crtc->fb->base.id;
266 dev_priv->cfb_y = work->crtc->y;
269 dev_priv->fbc_work = NULL;
273 drm_free(work, DRM_MEM_KMS);
276 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
278 if (dev_priv->fbc_work == NULL)
281 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
283 /* Synchronisation is provided by struct_mutex and checking of
284 * dev_priv->fbc_work, so we can perform the cancellation
285 * entirely asynchronously.
287 if (cancel_delayed_work(&dev_priv->fbc_work->work))
288 /* tasklet was killed before being run, clean up */
289 kfree(dev_priv->fbc_work, DRM_MEM_KMS);
291 /* Mark the work as no longer wanted so that if it does
292 * wake-up (because the work was already running and waiting
293 * for our mutex), it will discover that is no longer
296 dev_priv->fbc_work = NULL;
299 void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
301 struct intel_fbc_work *work;
302 struct drm_device *dev = crtc->dev;
303 struct drm_i915_private *dev_priv = dev->dev_private;
305 if (!dev_priv->display.enable_fbc)
308 intel_cancel_fbc_work(dev_priv);
310 work = kmalloc(sizeof(*work), DRM_MEM_KMS, M_WAITOK | M_ZERO);
313 work->interval = interval;
314 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
316 dev_priv->fbc_work = work;
318 DRM_DEBUG_KMS("scheduling delayed FBC enable\n");
320 /* Delay the actual enabling to let pageflipping cease and the
321 * display to settle before starting the compression. Note that
322 * this delay also serves a second purpose: it allows for a
323 * vblank to pass after disabling the FBC before we attempt
324 * to modify the control registers.
326 * A more complicated solution would involve tracking vblanks
327 * following the termination of the page-flipping sequence
328 * and indeed performing the enable as a co-routine and not
329 * waiting synchronously upon the vblank.
331 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
334 void intel_disable_fbc(struct drm_device *dev)
336 struct drm_i915_private *dev_priv = dev->dev_private;
338 intel_cancel_fbc_work(dev_priv);
340 if (!dev_priv->display.disable_fbc)
343 dev_priv->display.disable_fbc(dev);
344 dev_priv->cfb_plane = -1;
348 * intel_update_fbc - enable/disable FBC as needed
349 * @dev: the drm_device
351 * Set up the framebuffer compression hardware at mode set time. We
352 * enable it if possible:
353 * - plane A only (on pre-965)
354 * - no pixel mulitply/line duplication
355 * - no alpha buffer discard
357 * - framebuffer <= 2048 in width, 1536 in height
359 * We can't assume that any compression will take place (worst case),
360 * so the compressed buffer has to be the same size as the uncompressed
361 * one. It also must reside (along with the line length buffer) in
364 * We need to enable/disable FBC on a global basis.
366 void intel_update_fbc(struct drm_device *dev)
368 struct drm_i915_private *dev_priv = dev->dev_private;
369 struct drm_crtc *crtc = NULL, *tmp_crtc;
370 struct intel_crtc *intel_crtc;
371 struct drm_framebuffer *fb;
372 struct intel_framebuffer *intel_fb;
373 struct drm_i915_gem_object *obj;
381 if (!I915_HAS_FBC(dev))
385 * If FBC is already on, we just have to verify that we can
386 * keep it that way...
387 * Need to disable if:
388 * - more than one pipe is active
389 * - changing FBC params (stride, fence, mode)
390 * - new fb is too large to fit in compressed buffer
391 * - going to an unsupported config (interlace, pixel multiply, etc.)
393 list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
394 if (tmp_crtc->enabled && tmp_crtc->fb) {
396 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
397 dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES;
404 if (!crtc || crtc->fb == NULL) {
405 DRM_DEBUG_KMS("no output, disabling\n");
406 dev_priv->no_fbc_reason = FBC_NO_OUTPUT;
410 intel_crtc = to_intel_crtc(crtc);
412 intel_fb = to_intel_framebuffer(fb);
415 enable_fbc = i915_enable_fbc;
416 if (enable_fbc < 0) {
417 DRM_DEBUG_KMS("fbc set to per-chip default\n");
419 if (INTEL_INFO(dev)->gen <= 6)
423 DRM_DEBUG_KMS("fbc disabled per module param\n");
424 dev_priv->no_fbc_reason = FBC_MODULE_PARAM;
427 if (intel_fb->obj->base.size > dev_priv->cfb_size) {
428 DRM_DEBUG_KMS("framebuffer too large, disabling "
430 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
433 if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) ||
434 (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) {
435 DRM_DEBUG_KMS("mode incompatible with compression, "
437 dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE;
440 if ((crtc->mode.hdisplay > 2048) ||
441 (crtc->mode.vdisplay > 1536)) {
442 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
443 dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
446 if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) {
447 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
448 dev_priv->no_fbc_reason = FBC_BAD_PLANE;
451 if (obj->tiling_mode != I915_TILING_X ||
452 obj->fence_reg == I915_FENCE_REG_NONE) {
453 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
454 dev_priv->no_fbc_reason = FBC_NOT_TILED;
459 /* If the kernel debugger is active, always disable compression */
464 /* If the scanout has not changed, don't modify the FBC settings.
465 * Note that we make the fundamental assumption that the fb->obj
466 * cannot be unpinned (and have its GTT offset and fence revoked)
467 * without first being decoupled from the scanout and FBC disabled.
469 if (dev_priv->cfb_plane == intel_crtc->plane &&
470 dev_priv->cfb_fb == fb->base.id &&
471 dev_priv->cfb_y == crtc->y)
474 if (intel_fbc_enabled(dev)) {
475 /* We update FBC along two paths, after changing fb/crtc
476 * configuration (modeswitching) and after page-flipping
477 * finishes. For the latter, we know that not only did
478 * we disable the FBC at the start of the page-flip
479 * sequence, but also more than one vblank has passed.
481 * For the former case of modeswitching, it is possible
482 * to switch between two FBC valid configurations
483 * instantaneously so we do need to disable the FBC
484 * before we can modify its control registers. We also
485 * have to wait for the next vblank for that to take
486 * effect. However, since we delay enabling FBC we can
487 * assume that a vblank has passed since disabling and
488 * that we can safely alter the registers in the deferred
491 * In the scenario that we go from a valid to invalid
492 * and then back to valid FBC configuration we have
493 * no strict enforcement that a vblank occurred since
494 * disabling the FBC. However, along all current pipe
495 * disabling paths we do need to wait for a vblank at
496 * some point. And we wait before enabling FBC anyway.
498 DRM_DEBUG_KMS("disabling active FBC for update\n");
499 intel_disable_fbc(dev);
502 intel_enable_fbc(crtc, 500);
506 /* Multiple disables should be harmless */
507 if (intel_fbc_enabled(dev)) {
508 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
509 intel_disable_fbc(dev);
513 void i915_ironlake_get_mem_freq(struct drm_device *dev);
514 void i915_pineview_get_mem_freq(struct drm_device *dev);
516 void i915_pineview_get_mem_freq(struct drm_device *dev)
518 drm_i915_private_t *dev_priv = dev->dev_private;
521 tmp = I915_READ(CLKCFG);
523 switch (tmp & CLKCFG_FSB_MASK) {
525 dev_priv->fsb_freq = 533; /* 133*4 */
528 dev_priv->fsb_freq = 800; /* 200*4 */
531 dev_priv->fsb_freq = 667; /* 167*4 */
534 dev_priv->fsb_freq = 400; /* 100*4 */
538 switch (tmp & CLKCFG_MEM_MASK) {
540 dev_priv->mem_freq = 533;
543 dev_priv->mem_freq = 667;
546 dev_priv->mem_freq = 800;
550 /* detect pineview DDR3 setting */
551 tmp = I915_READ(CSHRDDR3CTL);
552 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
555 void i915_ironlake_get_mem_freq(struct drm_device *dev)
557 drm_i915_private_t *dev_priv = dev->dev_private;
560 ddrpll = I915_READ16(DDRMPLL1);
561 csipll = I915_READ16(CSIPLL0);
563 switch (ddrpll & 0xff) {
565 dev_priv->mem_freq = 800;
568 dev_priv->mem_freq = 1066;
571 dev_priv->mem_freq = 1333;
574 dev_priv->mem_freq = 1600;
577 DRM_DEBUG("unknown memory frequency 0x%02x\n",
579 dev_priv->mem_freq = 0;
583 dev_priv->r_t = dev_priv->mem_freq;
585 switch (csipll & 0x3ff) {
587 dev_priv->fsb_freq = 3200;
590 dev_priv->fsb_freq = 3733;
593 dev_priv->fsb_freq = 4266;
596 dev_priv->fsb_freq = 4800;
599 dev_priv->fsb_freq = 5333;
602 dev_priv->fsb_freq = 5866;
605 dev_priv->fsb_freq = 6400;
608 DRM_DEBUG("unknown fsb frequency 0x%04x\n",
610 dev_priv->fsb_freq = 0;
614 if (dev_priv->fsb_freq == 3200) {
616 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
623 /* Pineview has different values for various configs */
624 static const struct intel_watermark_params pineview_display_wm = {
625 PINEVIEW_DISPLAY_FIFO,
629 PINEVIEW_FIFO_LINE_SIZE
631 static const struct intel_watermark_params pineview_display_hplloff_wm = {
632 PINEVIEW_DISPLAY_FIFO,
634 PINEVIEW_DFT_HPLLOFF_WM,
636 PINEVIEW_FIFO_LINE_SIZE
638 static const struct intel_watermark_params pineview_cursor_wm = {
639 PINEVIEW_CURSOR_FIFO,
640 PINEVIEW_CURSOR_MAX_WM,
641 PINEVIEW_CURSOR_DFT_WM,
642 PINEVIEW_CURSOR_GUARD_WM,
643 PINEVIEW_FIFO_LINE_SIZE,
645 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
646 PINEVIEW_CURSOR_FIFO,
647 PINEVIEW_CURSOR_MAX_WM,
648 PINEVIEW_CURSOR_DFT_WM,
649 PINEVIEW_CURSOR_GUARD_WM,
650 PINEVIEW_FIFO_LINE_SIZE
652 static const struct intel_watermark_params g4x_wm_info = {
659 static const struct intel_watermark_params g4x_cursor_wm_info = {
666 static const struct intel_watermark_params i965_cursor_wm_info = {
673 static const struct intel_watermark_params i945_wm_info = {
680 static const struct intel_watermark_params i915_wm_info = {
687 static const struct intel_watermark_params i855_wm_info = {
694 static const struct intel_watermark_params i830_wm_info = {
702 static const struct intel_watermark_params ironlake_display_wm_info = {
709 static const struct intel_watermark_params ironlake_cursor_wm_info = {
716 static const struct intel_watermark_params ironlake_display_srwm_info = {
718 ILK_DISPLAY_MAX_SRWM,
719 ILK_DISPLAY_DFT_SRWM,
723 static const struct intel_watermark_params ironlake_cursor_srwm_info = {
731 static const struct intel_watermark_params sandybridge_display_wm_info = {
738 static const struct intel_watermark_params sandybridge_cursor_wm_info = {
745 static const struct intel_watermark_params sandybridge_display_srwm_info = {
747 SNB_DISPLAY_MAX_SRWM,
748 SNB_DISPLAY_DFT_SRWM,
752 static const struct intel_watermark_params sandybridge_cursor_srwm_info = {
762 * intel_calculate_wm - calculate watermark level
763 * @clock_in_khz: pixel clock
764 * @wm: chip FIFO params
765 * @pixel_size: display pixel size
766 * @latency_ns: memory latency for the platform
768 * Calculate the watermark level (the level at which the display plane will
769 * start fetching from memory again). Each chip has a different display
770 * FIFO size and allocation, so the caller needs to figure that out and pass
771 * in the correct intel_watermark_params structure.
773 * As the pixel clock runs, the FIFO will be drained at a rate that depends
774 * on the pixel size. When it reaches the watermark level, it'll start
775 * fetching FIFO line sized based chunks from memory until the FIFO fills
776 * past the watermark point. If the FIFO drains completely, a FIFO underrun
777 * will occur, and a display engine hang could result.
779 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
780 const struct intel_watermark_params *wm,
783 unsigned long latency_ns)
785 long entries_required, wm_size;
788 * Note: we need to make sure we don't overflow for various clock &
790 * clocks go from a few thousand to several hundred thousand.
791 * latency is usually a few thousand
793 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
795 entries_required = howmany(entries_required, wm->cacheline_size);
797 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
799 wm_size = fifo_size - (entries_required + wm->guard_size);
801 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
803 /* Don't promote wm_size to unsigned... */
804 if (wm_size > (long)wm->max_wm)
805 wm_size = wm->max_wm;
807 wm_size = wm->default_wm;
811 struct cxsr_latency {
814 unsigned long fsb_freq;
815 unsigned long mem_freq;
816 unsigned long display_sr;
817 unsigned long display_hpll_disable;
818 unsigned long cursor_sr;
819 unsigned long cursor_hpll_disable;
822 static const struct cxsr_latency cxsr_latency_table[] = {
823 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
824 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
825 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
826 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
827 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
829 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
830 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
831 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
832 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
833 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
835 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
836 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
837 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
838 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
839 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
841 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
842 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
843 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
844 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
845 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
847 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
848 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
849 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
850 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
851 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
853 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
854 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
855 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
856 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
857 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
860 const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
865 const struct cxsr_latency *latency;
868 if (fsb == 0 || mem == 0)
871 for (i = 0; i < DRM_ARRAY_SIZE(cxsr_latency_table); i++) {
872 latency = &cxsr_latency_table[i];
873 if (is_desktop == latency->is_desktop &&
874 is_ddr3 == latency->is_ddr3 &&
875 fsb == latency->fsb_freq && mem == latency->mem_freq)
879 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
884 void pineview_disable_cxsr(struct drm_device *dev)
886 struct drm_i915_private *dev_priv = dev->dev_private;
888 /* deactivate cxsr */
889 I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
893 * Latency for FIFO fetches is dependent on several factors:
894 * - memory configuration (speed, channels)
896 * - current MCH state
897 * It can be fairly high in some situations, so here we assume a fairly
898 * pessimal value. It's a tradeoff between extra memory fetches (if we
899 * set this value too high, the FIFO will fetch frequently to stay full)
900 * and power consumption (set it too low to save power and we might see
901 * FIFO underruns and display "flicker").
903 * A value of 5us seems to be a good balance; safe for very low end
904 * platforms but not overly aggressive on lower latency configs.
906 static const int latency_ns = 5000;
908 int i9xx_get_fifo_size(struct drm_device *dev, int plane)
910 struct drm_i915_private *dev_priv = dev->dev_private;
911 uint32_t dsparb = I915_READ(DSPARB);
914 size = dsparb & 0x7f;
916 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
918 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
919 plane ? "B" : "A", size);
924 int i85x_get_fifo_size(struct drm_device *dev, int plane)
926 struct drm_i915_private *dev_priv = dev->dev_private;
927 uint32_t dsparb = I915_READ(DSPARB);
930 size = dsparb & 0x1ff;
932 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
933 size >>= 1; /* Convert to cachelines */
935 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
936 plane ? "B" : "A", size);
941 int i845_get_fifo_size(struct drm_device *dev, int plane)
943 struct drm_i915_private *dev_priv = dev->dev_private;
944 uint32_t dsparb = I915_READ(DSPARB);
947 size = dsparb & 0x7f;
948 size >>= 2; /* Convert to cachelines */
950 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
957 int i830_get_fifo_size(struct drm_device *dev, int plane)
959 struct drm_i915_private *dev_priv = dev->dev_private;
960 uint32_t dsparb = I915_READ(DSPARB);
963 size = dsparb & 0x7f;
964 size >>= 1; /* Convert to cachelines */
966 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
967 plane ? "B" : "A", size);
972 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
974 struct drm_crtc *crtc, *enabled = NULL;
976 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
977 if (crtc->enabled && crtc->fb) {
987 void pineview_update_wm(struct drm_device *dev)
989 struct drm_i915_private *dev_priv = dev->dev_private;
990 struct drm_crtc *crtc;
991 const struct cxsr_latency *latency;
995 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
996 dev_priv->fsb_freq, dev_priv->mem_freq);
998 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
999 pineview_disable_cxsr(dev);
1003 crtc = single_enabled_crtc(dev);
1005 int clock = crtc->mode.clock;
1006 int pixel_size = crtc->fb->bits_per_pixel / 8;
1009 wm = intel_calculate_wm(clock, &pineview_display_wm,
1010 pineview_display_wm.fifo_size,
1011 pixel_size, latency->display_sr);
1012 reg = I915_READ(DSPFW1);
1013 reg &= ~DSPFW_SR_MASK;
1014 reg |= wm << DSPFW_SR_SHIFT;
1015 I915_WRITE(DSPFW1, reg);
1016 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
1019 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
1020 pineview_display_wm.fifo_size,
1021 pixel_size, latency->cursor_sr);
1022 reg = I915_READ(DSPFW3);
1023 reg &= ~DSPFW_CURSOR_SR_MASK;
1024 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
1025 I915_WRITE(DSPFW3, reg);
1027 /* Display HPLL off SR */
1028 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
1029 pineview_display_hplloff_wm.fifo_size,
1030 pixel_size, latency->display_hpll_disable);
1031 reg = I915_READ(DSPFW3);
1032 reg &= ~DSPFW_HPLL_SR_MASK;
1033 reg |= wm & DSPFW_HPLL_SR_MASK;
1034 I915_WRITE(DSPFW3, reg);
1036 /* cursor HPLL off SR */
1037 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
1038 pineview_display_hplloff_wm.fifo_size,
1039 pixel_size, latency->cursor_hpll_disable);
1040 reg = I915_READ(DSPFW3);
1041 reg &= ~DSPFW_HPLL_CURSOR_MASK;
1042 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
1043 I915_WRITE(DSPFW3, reg);
1044 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
1048 I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
1049 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1051 pineview_disable_cxsr(dev);
1052 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1056 static bool g4x_compute_wm0(struct drm_device *dev,
1058 const struct intel_watermark_params *display,
1059 int display_latency_ns,
1060 const struct intel_watermark_params *cursor,
1061 int cursor_latency_ns,
1065 struct drm_crtc *crtc;
1066 int htotal, hdisplay, clock, pixel_size;
1067 int line_time_us, line_count;
1068 int entries, tlb_miss;
1070 crtc = intel_get_crtc_for_plane(dev, plane);
1071 if (crtc->fb == NULL || !crtc->enabled) {
1072 *cursor_wm = cursor->guard_size;
1073 *plane_wm = display->guard_size;
1077 htotal = crtc->mode.htotal;
1078 hdisplay = crtc->mode.hdisplay;
1079 clock = crtc->mode.clock;
1080 pixel_size = crtc->fb->bits_per_pixel / 8;
1082 /* Use the small buffer method to calculate plane watermark */
1083 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1084 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
1086 entries += tlb_miss;
1087 entries = howmany(entries, display->cacheline_size);
1088 *plane_wm = entries + display->guard_size;
1089 if (*plane_wm > (int)display->max_wm)
1090 *plane_wm = display->max_wm;
1092 /* Use the large buffer method to calculate cursor watermark */
1093 line_time_us = ((htotal * 1000) / clock);
1094 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
1095 entries = line_count * 64 * pixel_size;
1096 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
1098 entries += tlb_miss;
1099 entries = howmany(entries, cursor->cacheline_size);
1100 *cursor_wm = entries + cursor->guard_size;
1101 if (*cursor_wm > (int)cursor->max_wm)
1102 *cursor_wm = (int)cursor->max_wm;
1108 * Check the wm result.
1110 * If any calculated watermark values is larger than the maximum value that
1111 * can be programmed into the associated watermark register, that watermark
1114 static bool g4x_check_srwm(struct drm_device *dev,
1115 int display_wm, int cursor_wm,
1116 const struct intel_watermark_params *display,
1117 const struct intel_watermark_params *cursor)
1119 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1120 display_wm, cursor_wm);
1122 if (display_wm > display->max_wm) {
1123 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1124 display_wm, display->max_wm);
1128 if (cursor_wm > cursor->max_wm) {
1129 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1130 cursor_wm, cursor->max_wm);
1134 if (!(display_wm || cursor_wm)) {
1135 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1142 static bool g4x_compute_srwm(struct drm_device *dev,
1145 const struct intel_watermark_params *display,
1146 const struct intel_watermark_params *cursor,
1147 int *display_wm, int *cursor_wm)
1149 struct drm_crtc *crtc;
1150 int hdisplay, htotal, pixel_size, clock;
1151 unsigned long line_time_us;
1152 int line_count, line_size;
1157 *display_wm = *cursor_wm = 0;
1161 crtc = intel_get_crtc_for_plane(dev, plane);
1162 hdisplay = crtc->mode.hdisplay;
1163 htotal = crtc->mode.htotal;
1164 clock = crtc->mode.clock;
1165 pixel_size = crtc->fb->bits_per_pixel / 8;
1167 line_time_us = (htotal * 1000) / clock;
1168 line_count = (latency_ns / line_time_us + 1000) / 1000;
1169 line_size = hdisplay * pixel_size;
1171 /* Use the minimum of the small and large buffer method for primary */
1172 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1173 large = line_count * line_size;
1175 entries = howmany(min(small, large), display->cacheline_size);
1176 *display_wm = entries + display->guard_size;
1178 /* calculate the self-refresh watermark for display cursor */
1179 entries = line_count * pixel_size * 64;
1180 entries = howmany(entries, cursor->cacheline_size);
1181 *cursor_wm = entries + cursor->guard_size;
1183 return g4x_check_srwm(dev,
1184 *display_wm, *cursor_wm,
1188 #define single_plane_enabled(mask) ((mask) != 0 && powerof2(mask))
1190 void g4x_update_wm(struct drm_device *dev)
1192 static const int sr_latency_ns = 12000;
1193 struct drm_i915_private *dev_priv = dev->dev_private;
1194 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1195 int plane_sr, cursor_sr;
1196 unsigned int enabled = 0;
1198 if (g4x_compute_wm0(dev, 0,
1199 &g4x_wm_info, latency_ns,
1200 &g4x_cursor_wm_info, latency_ns,
1201 &planea_wm, &cursora_wm))
1204 if (g4x_compute_wm0(dev, 1,
1205 &g4x_wm_info, latency_ns,
1206 &g4x_cursor_wm_info, latency_ns,
1207 &planeb_wm, &cursorb_wm))
1210 plane_sr = cursor_sr = 0;
1211 if (single_plane_enabled(enabled) &&
1212 g4x_compute_srwm(dev, ffs(enabled) - 1,
1215 &g4x_cursor_wm_info,
1216 &plane_sr, &cursor_sr))
1217 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1219 I915_WRITE(FW_BLC_SELF,
1220 I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN);
1222 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1223 planea_wm, cursora_wm,
1224 planeb_wm, cursorb_wm,
1225 plane_sr, cursor_sr);
1228 (plane_sr << DSPFW_SR_SHIFT) |
1229 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1230 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1233 (I915_READ(DSPFW2) & DSPFW_CURSORA_MASK) |
1234 (cursora_wm << DSPFW_CURSORA_SHIFT));
1235 /* HPLL off in SR has some issues on G4x... disable it */
1237 (I915_READ(DSPFW3) & ~DSPFW_HPLL_SR_EN) |
1238 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1241 void i965_update_wm(struct drm_device *dev)
1243 struct drm_i915_private *dev_priv = dev->dev_private;
1244 struct drm_crtc *crtc;
1248 /* Calc sr entries for one plane configs */
1249 crtc = single_enabled_crtc(dev);
1251 /* self-refresh has much higher latency */
1252 static const int sr_latency_ns = 12000;
1253 int clock = crtc->mode.clock;
1254 int htotal = crtc->mode.htotal;
1255 int hdisplay = crtc->mode.hdisplay;
1256 int pixel_size = crtc->fb->bits_per_pixel / 8;
1257 unsigned long line_time_us;
1260 line_time_us = ((htotal * 1000) / clock);
1262 /* Use ns/us then divide to preserve precision */
1263 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1264 pixel_size * hdisplay;
1265 entries = howmany(entries, I915_FIFO_LINE_SIZE);
1266 srwm = I965_FIFO_SIZE - entries;
1270 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1273 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1275 entries = howmany(entries, i965_cursor_wm_info.cacheline_size);
1276 cursor_sr = i965_cursor_wm_info.fifo_size -
1277 (entries + i965_cursor_wm_info.guard_size);
1279 if (cursor_sr > i965_cursor_wm_info.max_wm)
1280 cursor_sr = i965_cursor_wm_info.max_wm;
1282 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1283 "cursor %d\n", srwm, cursor_sr);
1285 if (IS_CRESTLINE(dev))
1286 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1288 /* Turn off self refresh if both pipes are enabled */
1289 if (IS_CRESTLINE(dev))
1290 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
1294 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1297 /* 965 has limitations... */
1298 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
1299 (8 << 16) | (8 << 8) | (8 << 0));
1300 I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
1301 /* update cursor SR watermark */
1302 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1305 void i9xx_update_wm(struct drm_device *dev)
1307 struct drm_i915_private *dev_priv = dev->dev_private;
1308 const struct intel_watermark_params *wm_info;
1313 int planea_wm, planeb_wm;
1314 struct drm_crtc *crtc, *enabled = NULL;
1317 wm_info = &i945_wm_info;
1318 else if (!IS_GEN2(dev))
1319 wm_info = &i915_wm_info;
1321 wm_info = &i855_wm_info;
1323 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
1324 crtc = intel_get_crtc_for_plane(dev, 0);
1325 if (crtc->enabled && crtc->fb) {
1326 planea_wm = intel_calculate_wm(crtc->mode.clock,
1328 crtc->fb->bits_per_pixel / 8,
1332 planea_wm = fifo_size - wm_info->guard_size;
1334 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
1335 crtc = intel_get_crtc_for_plane(dev, 1);
1336 if (crtc->enabled && crtc->fb) {
1337 planeb_wm = intel_calculate_wm(crtc->mode.clock,
1339 crtc->fb->bits_per_pixel / 8,
1341 if (enabled == NULL)
1346 planeb_wm = fifo_size - wm_info->guard_size;
1348 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1351 * Overlay gets an aggressive default since video jitter is bad.
1355 /* Play safe and disable self-refresh before adjusting watermarks. */
1356 if (IS_I945G(dev) || IS_I945GM(dev))
1357 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0);
1358 else if (IS_I915GM(dev))
1359 I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
1361 /* Calc sr entries for one plane configs */
1362 if (HAS_FW_BLC(dev) && enabled) {
1363 /* self-refresh has much higher latency */
1364 static const int sr_latency_ns = 6000;
1365 int clock = enabled->mode.clock;
1366 int htotal = enabled->mode.htotal;
1367 int hdisplay = enabled->mode.hdisplay;
1368 int pixel_size = enabled->fb->bits_per_pixel / 8;
1369 unsigned long line_time_us;
1372 line_time_us = (htotal * 1000) / clock;
1374 /* Use ns/us then divide to preserve precision */
1375 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1376 pixel_size * hdisplay;
1377 entries = howmany(entries, wm_info->cacheline_size);
1378 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1379 srwm = wm_info->fifo_size - entries;
1383 if (IS_I945G(dev) || IS_I945GM(dev))
1384 I915_WRITE(FW_BLC_SELF,
1385 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1386 else if (IS_I915GM(dev))
1387 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1390 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1391 planea_wm, planeb_wm, cwm, srwm);
1393 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1394 fwater_hi = (cwm & 0x1f);
1396 /* Set request length to 8 cachelines per fetch */
1397 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1398 fwater_hi = fwater_hi | (1 << 8);
1400 I915_WRITE(FW_BLC, fwater_lo);
1401 I915_WRITE(FW_BLC2, fwater_hi);
1403 if (HAS_FW_BLC(dev)) {
1405 if (IS_I945G(dev) || IS_I945GM(dev))
1406 I915_WRITE(FW_BLC_SELF,
1407 FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
1408 else if (IS_I915GM(dev))
1409 I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
1410 DRM_DEBUG_KMS("memory self refresh enabled\n");
1412 DRM_DEBUG_KMS("memory self refresh disabled\n");
1416 void i830_update_wm(struct drm_device *dev)
1418 struct drm_i915_private *dev_priv = dev->dev_private;
1419 struct drm_crtc *crtc;
1423 crtc = single_enabled_crtc(dev);
1427 planea_wm = intel_calculate_wm(crtc->mode.clock, &i830_wm_info,
1428 dev_priv->display.get_fifo_size(dev, 0),
1429 crtc->fb->bits_per_pixel / 8,
1431 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1432 fwater_lo |= (3<<8) | planea_wm;
1434 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1436 I915_WRITE(FW_BLC, fwater_lo);
1439 #define ILK_LP0_PLANE_LATENCY 700
1440 #define ILK_LP0_CURSOR_LATENCY 1300
1443 * Check the wm result.
1445 * If any calculated watermark values is larger than the maximum value that
1446 * can be programmed into the associated watermark register, that watermark
1449 static bool ironlake_check_srwm(struct drm_device *dev, int level,
1450 int fbc_wm, int display_wm, int cursor_wm,
1451 const struct intel_watermark_params *display,
1452 const struct intel_watermark_params *cursor)
1454 struct drm_i915_private *dev_priv = dev->dev_private;
1456 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1457 " cursor %d\n", level, display_wm, fbc_wm, cursor_wm);
1459 if (fbc_wm > SNB_FBC_MAX_SRWM) {
1460 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1461 fbc_wm, SNB_FBC_MAX_SRWM, level);
1463 /* fbc has it's own way to disable FBC WM */
1464 I915_WRITE(DISP_ARB_CTL,
1465 I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS);
1469 if (display_wm > display->max_wm) {
1470 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1471 display_wm, SNB_DISPLAY_MAX_SRWM, level);
1475 if (cursor_wm > cursor->max_wm) {
1476 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1477 cursor_wm, SNB_CURSOR_MAX_SRWM, level);
1481 if (!(fbc_wm || display_wm || cursor_wm)) {
1482 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level);
1490 * Compute watermark values of WM[1-3],
1492 static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane,
1494 const struct intel_watermark_params *display,
1495 const struct intel_watermark_params *cursor,
1496 int *fbc_wm, int *display_wm, int *cursor_wm)
1498 struct drm_crtc *crtc;
1499 unsigned long line_time_us;
1500 int hdisplay, htotal, pixel_size, clock;
1501 int line_count, line_size;
1506 *fbc_wm = *display_wm = *cursor_wm = 0;
1510 crtc = intel_get_crtc_for_plane(dev, plane);
1511 hdisplay = crtc->mode.hdisplay;
1512 htotal = crtc->mode.htotal;
1513 clock = crtc->mode.clock;
1514 pixel_size = crtc->fb->bits_per_pixel / 8;
1516 line_time_us = (htotal * 1000) / clock;
1517 line_count = (latency_ns / line_time_us + 1000) / 1000;
1518 line_size = hdisplay * pixel_size;
1520 /* Use the minimum of the small and large buffer method for primary */
1521 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1522 large = line_count * line_size;
1524 entries = howmany(min(small, large), display->cacheline_size);
1525 *display_wm = entries + display->guard_size;
1529 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1531 *fbc_wm = howmany(*display_wm * 64, line_size) + 2;
1533 /* calculate the self-refresh watermark for display cursor */
1534 entries = line_count * pixel_size * 64;
1535 entries = howmany(entries, cursor->cacheline_size);
1536 *cursor_wm = entries + cursor->guard_size;
1538 return ironlake_check_srwm(dev, level,
1539 *fbc_wm, *display_wm, *cursor_wm,
1543 void ironlake_update_wm(struct drm_device *dev)
1545 struct drm_i915_private *dev_priv = dev->dev_private;
1546 int fbc_wm, plane_wm, cursor_wm;
1547 unsigned int enabled;
1550 if (g4x_compute_wm0(dev, 0,
1551 &ironlake_display_wm_info,
1552 ILK_LP0_PLANE_LATENCY,
1553 &ironlake_cursor_wm_info,
1554 ILK_LP0_CURSOR_LATENCY,
1555 &plane_wm, &cursor_wm)) {
1556 I915_WRITE(WM0_PIPEA_ILK,
1557 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
1558 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1559 " plane %d, " "cursor: %d\n",
1560 plane_wm, cursor_wm);
1564 if (g4x_compute_wm0(dev, 1,
1565 &ironlake_display_wm_info,
1566 ILK_LP0_PLANE_LATENCY,
1567 &ironlake_cursor_wm_info,
1568 ILK_LP0_CURSOR_LATENCY,
1569 &plane_wm, &cursor_wm)) {
1570 I915_WRITE(WM0_PIPEB_ILK,
1571 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
1572 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1573 " plane %d, cursor: %d\n",
1574 plane_wm, cursor_wm);
1579 * Calculate and update the self-refresh watermark only when one
1580 * display plane is used.
1582 I915_WRITE(WM3_LP_ILK, 0);
1583 I915_WRITE(WM2_LP_ILK, 0);
1584 I915_WRITE(WM1_LP_ILK, 0);
1586 if (!single_plane_enabled(enabled))
1588 enabled = ffs(enabled) - 1;
1591 if (!ironlake_compute_srwm(dev, 1, enabled,
1592 ILK_READ_WM1_LATENCY() * 500,
1593 &ironlake_display_srwm_info,
1594 &ironlake_cursor_srwm_info,
1595 &fbc_wm, &plane_wm, &cursor_wm))
1598 I915_WRITE(WM1_LP_ILK,
1600 (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1601 (fbc_wm << WM1_LP_FBC_SHIFT) |
1602 (plane_wm << WM1_LP_SR_SHIFT) |
1606 if (!ironlake_compute_srwm(dev, 2, enabled,
1607 ILK_READ_WM2_LATENCY() * 500,
1608 &ironlake_display_srwm_info,
1609 &ironlake_cursor_srwm_info,
1610 &fbc_wm, &plane_wm, &cursor_wm))
1613 I915_WRITE(WM2_LP_ILK,
1615 (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1616 (fbc_wm << WM1_LP_FBC_SHIFT) |
1617 (plane_wm << WM1_LP_SR_SHIFT) |
1621 * WM3 is unsupported on ILK, probably because we don't have latency
1622 * data for that power state
1626 void sandybridge_update_wm(struct drm_device *dev)
1628 struct drm_i915_private *dev_priv = dev->dev_private;
1629 int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
1631 int fbc_wm, plane_wm, cursor_wm;
1632 unsigned int enabled;
1635 if (g4x_compute_wm0(dev, 0,
1636 &sandybridge_display_wm_info, latency,
1637 &sandybridge_cursor_wm_info, latency,
1638 &plane_wm, &cursor_wm)) {
1639 val = I915_READ(WM0_PIPEA_ILK);
1640 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1641 I915_WRITE(WM0_PIPEA_ILK, val |
1642 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1643 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1644 " plane %d, " "cursor: %d\n",
1645 plane_wm, cursor_wm);
1649 if (g4x_compute_wm0(dev, 1,
1650 &sandybridge_display_wm_info, latency,
1651 &sandybridge_cursor_wm_info, latency,
1652 &plane_wm, &cursor_wm)) {
1653 val = I915_READ(WM0_PIPEB_ILK);
1654 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1655 I915_WRITE(WM0_PIPEB_ILK, val |
1656 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1657 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1658 " plane %d, cursor: %d\n",
1659 plane_wm, cursor_wm);
1663 /* IVB has 3 pipes */
1664 if (IS_IVYBRIDGE(dev) &&
1665 g4x_compute_wm0(dev, 2,
1666 &sandybridge_display_wm_info, latency,
1667 &sandybridge_cursor_wm_info, latency,
1668 &plane_wm, &cursor_wm)) {
1669 val = I915_READ(WM0_PIPEC_IVB);
1670 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1671 I915_WRITE(WM0_PIPEC_IVB, val |
1672 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1673 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
1674 " plane %d, cursor: %d\n",
1675 plane_wm, cursor_wm);
1680 * Calculate and update the self-refresh watermark only when one
1681 * display plane is used.
1683 * SNB support 3 levels of watermark.
1685 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1686 * and disabled in the descending order
1689 I915_WRITE(WM3_LP_ILK, 0);
1690 I915_WRITE(WM2_LP_ILK, 0);
1691 I915_WRITE(WM1_LP_ILK, 0);
1693 if (!single_plane_enabled(enabled) ||
1694 dev_priv->sprite_scaling_enabled)
1696 enabled = ffs(enabled) - 1;
1699 if (!ironlake_compute_srwm(dev, 1, enabled,
1700 SNB_READ_WM1_LATENCY() * 500,
1701 &sandybridge_display_srwm_info,
1702 &sandybridge_cursor_srwm_info,
1703 &fbc_wm, &plane_wm, &cursor_wm))
1706 I915_WRITE(WM1_LP_ILK,
1708 (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1709 (fbc_wm << WM1_LP_FBC_SHIFT) |
1710 (plane_wm << WM1_LP_SR_SHIFT) |
1714 if (!ironlake_compute_srwm(dev, 2, enabled,
1715 SNB_READ_WM2_LATENCY() * 500,
1716 &sandybridge_display_srwm_info,
1717 &sandybridge_cursor_srwm_info,
1718 &fbc_wm, &plane_wm, &cursor_wm))
1721 I915_WRITE(WM2_LP_ILK,
1723 (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1724 (fbc_wm << WM1_LP_FBC_SHIFT) |
1725 (plane_wm << WM1_LP_SR_SHIFT) |
1729 if (!ironlake_compute_srwm(dev, 3, enabled,
1730 SNB_READ_WM3_LATENCY() * 500,
1731 &sandybridge_display_srwm_info,
1732 &sandybridge_cursor_srwm_info,
1733 &fbc_wm, &plane_wm, &cursor_wm))
1736 I915_WRITE(WM3_LP_ILK,
1738 (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
1739 (fbc_wm << WM1_LP_FBC_SHIFT) |
1740 (plane_wm << WM1_LP_SR_SHIFT) |
1745 sandybridge_compute_sprite_wm(struct drm_device *dev, int plane,
1746 uint32_t sprite_width, int pixel_size,
1747 const struct intel_watermark_params *display,
1748 int display_latency_ns, int *sprite_wm)
1750 struct drm_crtc *crtc;
1752 int entries, tlb_miss;
1754 crtc = intel_get_crtc_for_plane(dev, plane);
1755 if (crtc->fb == NULL || !crtc->enabled) {
1756 *sprite_wm = display->guard_size;
1760 clock = crtc->mode.clock;
1762 /* Use the small buffer method to calculate the sprite watermark */
1763 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1764 tlb_miss = display->fifo_size*display->cacheline_size -
1767 entries += tlb_miss;
1768 entries = howmany(entries, display->cacheline_size);
1769 *sprite_wm = entries + display->guard_size;
1770 if (*sprite_wm > (int)display->max_wm)
1771 *sprite_wm = display->max_wm;
1777 sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane,
1778 uint32_t sprite_width, int pixel_size,
1779 const struct intel_watermark_params *display,
1780 int latency_ns, int *sprite_wm)
1782 struct drm_crtc *crtc;
1783 unsigned long line_time_us;
1785 int line_count, line_size;
1794 crtc = intel_get_crtc_for_plane(dev, plane);
1795 clock = crtc->mode.clock;
1801 line_time_us = (sprite_width * 1000) / clock;
1802 if (!line_time_us) {
1807 line_count = (latency_ns / line_time_us + 1000) / 1000;
1808 line_size = sprite_width * pixel_size;
1810 /* Use the minimum of the small and large buffer method for primary */
1811 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1812 large = line_count * line_size;
1814 entries = howmany(min(small, large), display->cacheline_size);
1815 *sprite_wm = entries + display->guard_size;
1817 return *sprite_wm > 0x3ff ? false : true;
1820 void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
1821 uint32_t sprite_width, int pixel_size)
1823 struct drm_i915_private *dev_priv = dev->dev_private;
1824 int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
1831 reg = WM0_PIPEA_ILK;
1834 reg = WM0_PIPEB_ILK;
1837 reg = WM0_PIPEC_IVB;
1840 return; /* bad pipe */
1843 ret = sandybridge_compute_sprite_wm(dev, pipe, sprite_width, pixel_size,
1844 &sandybridge_display_wm_info,
1845 latency, &sprite_wm);
1847 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %d\n",
1852 val = I915_READ(reg);
1853 val &= ~WM0_PIPE_SPRITE_MASK;
1854 I915_WRITE(reg, val | (sprite_wm << WM0_PIPE_SPRITE_SHIFT));
1855 DRM_DEBUG_KMS("sprite watermarks For pipe %d - %d\n", pipe, sprite_wm);
1858 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
1860 &sandybridge_display_srwm_info,
1861 SNB_READ_WM1_LATENCY() * 500,
1864 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %d\n",
1868 I915_WRITE(WM1S_LP_ILK, sprite_wm);
1870 /* Only IVB has two more LP watermarks for sprite */
1871 if (!IS_IVYBRIDGE(dev))
1874 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
1876 &sandybridge_display_srwm_info,
1877 SNB_READ_WM2_LATENCY() * 500,
1880 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %d\n",
1884 I915_WRITE(WM2S_LP_IVB, sprite_wm);
1886 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
1888 &sandybridge_display_srwm_info,
1889 SNB_READ_WM3_LATENCY() * 500,
1892 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %d\n",
1896 I915_WRITE(WM3S_LP_IVB, sprite_wm);
1900 * intel_update_watermarks - update FIFO watermark values based on current modes
1902 * Calculate watermark values for the various WM regs based on current mode
1903 * and plane configuration.
1905 * There are several cases to deal with here:
1906 * - normal (i.e. non-self-refresh)
1907 * - self-refresh (SR) mode
1908 * - lines are large relative to FIFO size (buffer can hold up to 2)
1909 * - lines are small relative to FIFO size (buffer can hold more than 2
1910 * lines), so need to account for TLB latency
1912 * The normal calculation is:
1913 * watermark = dotclock * bytes per pixel * latency
1914 * where latency is platform & configuration dependent (we assume pessimal
1917 * The SR calculation is:
1918 * watermark = (trunc(latency/line time)+1) * surface width *
1921 * line time = htotal / dotclock
1922 * surface width = hdisplay for normal plane and 64 for cursor
1923 * and latency is assumed to be high, as above.
1925 * The final value programmed to the register should always be rounded up,
1926 * and include an extra 2 entries to account for clock crossings.
1928 * We don't use the sprite, so we can ignore that. And on Crestline we have
1929 * to set the non-SR watermarks to 8.
1931 void intel_update_watermarks(struct drm_device *dev)
1933 struct drm_i915_private *dev_priv = dev->dev_private;
1935 if (dev_priv->display.update_wm)
1936 dev_priv->display.update_wm(dev);
1939 void intel_update_sprite_watermarks(struct drm_device *dev, int pipe,
1940 uint32_t sprite_width, int pixel_size)
1942 struct drm_i915_private *dev_priv = dev->dev_private;
1944 if (dev_priv->display.update_sprite_wm)
1945 dev_priv->display.update_sprite_wm(dev, pipe, sprite_width,
1949 static struct drm_i915_gem_object *
1950 intel_alloc_context_page(struct drm_device *dev)
1952 struct drm_i915_gem_object *ctx;
1955 DRM_LOCK_ASSERT(dev);
1957 ctx = i915_gem_alloc_object(dev, 4096);
1959 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
1963 ret = i915_gem_object_pin(ctx, 4096, true);
1965 DRM_ERROR("failed to pin power context: %d\n", ret);
1969 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
1971 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
1978 i915_gem_object_unpin(ctx);
1980 drm_gem_object_unreference(&ctx->base);
1986 * Lock protecting IPS related data structures
1988 struct lock mchdev_lock;
1989 LOCK_SYSINIT(mchdev, &mchdev_lock, "mchdev", LK_CANRECURSE);
1991 /* Global for IPS driver to get at the current i915 device. Protected by
1993 struct drm_i915_private *i915_mch_dev;
1995 bool ironlake_set_drps(struct drm_device *dev, u8 val)
1997 struct drm_i915_private *dev_priv = dev->dev_private;
2000 rgvswctl = I915_READ16(MEMSWCTL);
2001 if (rgvswctl & MEMCTL_CMD_STS) {
2002 DRM_DEBUG("gpu busy, RCS change rejected\n");
2003 return false; /* still busy with another command */
2006 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
2007 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
2008 I915_WRITE16(MEMSWCTL, rgvswctl);
2009 POSTING_READ16(MEMSWCTL);
2011 rgvswctl |= MEMCTL_CMD_STS;
2012 I915_WRITE16(MEMSWCTL, rgvswctl);
2017 void ironlake_enable_drps(struct drm_device *dev)
2019 struct drm_i915_private *dev_priv = dev->dev_private;
2020 u32 rgvmodectl = I915_READ(MEMMODECTL);
2021 u8 fmax, fmin, fstart, vstart;
2023 /* Enable temp reporting */
2024 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
2025 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
2027 /* 100ms RC evaluation intervals */
2028 I915_WRITE(RCUPEI, 100000);
2029 I915_WRITE(RCDNEI, 100000);
2031 /* Set max/min thresholds to 90ms and 80ms respectively */
2032 I915_WRITE(RCBMAXAVG, 90000);
2033 I915_WRITE(RCBMINAVG, 80000);
2035 I915_WRITE(MEMIHYST, 1);
2037 /* Set up min, max, and cur for interrupt handling */
2038 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
2039 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
2040 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
2041 MEMMODE_FSTART_SHIFT;
2043 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
2046 dev_priv->fmax = fmax; /* IPS callback will increase this */
2047 dev_priv->fstart = fstart;
2049 dev_priv->rps.max_delay = fstart;
2050 dev_priv->rps.min_delay = fmin;
2051 dev_priv->rps.cur_delay = fstart;
2053 DRM_DEBUG("fmax: %d, fmin: %d, fstart: %d\n",
2054 fmax, fmin, fstart);
2056 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
2059 * Interrupts will be enabled in ironlake_irq_postinstall
2062 I915_WRITE(VIDSTART, vstart);
2063 POSTING_READ(VIDSTART);
2065 rgvmodectl |= MEMMODE_SWMODE_EN;
2066 I915_WRITE(MEMMODECTL, rgvmodectl);
2068 if (_intel_wait_for(dev,
2069 (I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10,
2071 DRM_ERROR("stuck trying to change perf mode\n");
2074 ironlake_set_drps(dev, fstart);
2076 dev_priv->last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
2078 dev_priv->last_time1 = jiffies_to_msecs(jiffies);
2079 dev_priv->last_count2 = I915_READ(0x112f4);
2080 nanotime(&dev_priv->last_time2);
2083 void ironlake_disable_drps(struct drm_device *dev)
2085 struct drm_i915_private *dev_priv = dev->dev_private;
2086 u16 rgvswctl = I915_READ16(MEMSWCTL);
2088 /* Ack interrupts, disable EFC interrupt */
2089 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
2090 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
2091 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
2092 I915_WRITE(DEIIR, DE_PCU_EVENT);
2093 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
2095 /* Go back to the starting frequency */
2096 ironlake_set_drps(dev, dev_priv->fstart);
2098 rgvswctl |= MEMCTL_CMD_STS;
2099 I915_WRITE(MEMSWCTL, rgvswctl);
2104 void gen6_set_rps(struct drm_device *dev, u8 val)
2106 struct drm_i915_private *dev_priv = dev->dev_private;
2109 swreq = (val & 0x3ff) << 25;
2110 I915_WRITE(GEN6_RPNSWREQ, swreq);
2113 void gen6_disable_rps(struct drm_device *dev)
2115 struct drm_i915_private *dev_priv = dev->dev_private;
2117 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
2118 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
2119 I915_WRITE(GEN6_PMIER, 0);
2120 /* Complete PM interrupt masking here doesn't race with the rps work
2121 * item again unmasking PM interrupts because that is using a different
2122 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
2123 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
2125 spin_lock(&dev_priv->rps.lock);
2126 dev_priv->rps.pm_iir = 0;
2127 spin_unlock(&dev_priv->rps.lock);
2129 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
2132 static unsigned long intel_pxfreq(u32 vidfreq)
2135 int div = (vidfreq & 0x3f0000) >> 16;
2136 int post = (vidfreq & 0x3000) >> 12;
2137 int pre = (vidfreq & 0x7);
2142 freq = ((div * 133333) / ((1<<post) * pre));
2147 static const struct cparams {
2153 { 1, 1333, 301, 28664 },
2154 { 1, 1066, 294, 24460 },
2155 { 1, 800, 294, 25192 },
2156 { 0, 1333, 276, 27605 },
2157 { 0, 1066, 276, 27605 },
2158 { 0, 800, 231, 23784 },
2161 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
2163 u64 total_count, diff, ret;
2164 u32 count1, count2, count3, m = 0, c = 0;
2165 unsigned long now = jiffies_to_msecs(jiffies), diff1;
2168 diff1 = now - dev_priv->last_time1;
2170 * sysctl(8) reads the value of sysctl twice in rapid
2171 * succession. There is high chance that it happens in the
2172 * same timer tick. Use the cached value to not divide by
2173 * zero and give the hw a chance to gather more samples.
2176 return (dev_priv->chipset_power);
2178 count1 = I915_READ(DMIEC);
2179 count2 = I915_READ(DDREC);
2180 count3 = I915_READ(CSIEC);
2182 total_count = count1 + count2 + count3;
2184 /* FIXME: handle per-counter overflow */
2185 if (total_count < dev_priv->last_count1) {
2186 diff = ~0UL - dev_priv->last_count1;
2187 diff += total_count;
2189 diff = total_count - dev_priv->last_count1;
2192 for (i = 0; i < DRM_ARRAY_SIZE(cparams); i++) {
2193 if (cparams[i].i == dev_priv->c_m &&
2194 cparams[i].t == dev_priv->r_t) {
2201 diff = diff / diff1;
2202 ret = ((m * diff) + c);
2205 dev_priv->last_count1 = total_count;
2206 dev_priv->last_time1 = now;
2208 dev_priv->chipset_power = ret;
2212 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
2214 unsigned long m, x, b;
2217 tsfs = I915_READ(TSFS);
2219 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
2220 x = I915_READ8(TR1);
2222 b = tsfs & TSFS_INTR_MASK;
2224 return ((m * x) / 127) - b;
2227 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
2229 static const struct v_table {
2230 u16 vd; /* in .1 mil */
2231 u16 vm; /* in .1 mil */
2362 if (dev_priv->info->is_mobile)
2363 return v_table[pxvid].vm;
2365 return v_table[pxvid].vd;
2368 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
2370 struct timespec now, diff1;
2372 unsigned long diffms;
2375 if (dev_priv->info->gen != 5)
2380 timespecsub(&diff1, &dev_priv->last_time2);
2382 /* Don't divide by 0 */
2383 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
2387 count = I915_READ(GFXEC);
2389 if (count < dev_priv->last_count2) {
2390 diff = ~0UL - dev_priv->last_count2;
2393 diff = count - dev_priv->last_count2;
2396 dev_priv->last_count2 = count;
2397 dev_priv->last_time2 = now;
2399 /* More magic constants... */
2401 diff = diff / (diffms * 10);
2402 dev_priv->gfx_power = diff;
2405 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
2407 unsigned long t, corr, state1, corr2, state2;
2410 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4));
2411 pxvid = (pxvid >> 24) & 0x7f;
2412 ext_v = pvid_to_extvid(dev_priv, pxvid);
2416 t = i915_mch_val(dev_priv);
2418 /* Revel in the empirically derived constants */
2420 /* Correction factor in 1/100000 units */
2422 corr = ((t * 2349) + 135940);
2424 corr = ((t * 964) + 29317);
2426 corr = ((t * 301) + 1004);
2428 corr = corr * ((150142 * state1) / 10000 - 78642);
2430 corr2 = (corr * dev_priv->corr);
2432 state2 = (corr2 * state1) / 10000;
2433 state2 /= 100; /* convert to mW */
2435 i915_update_gfx_val(dev_priv);
2437 return dev_priv->gfx_power + state2;
2441 * i915_read_mch_val - return value for IPS use
2443 * Calculate and return a value for the IPS driver to use when deciding whether
2444 * we have thermal and power headroom to increase CPU or GPU power budget.
2446 unsigned long i915_read_mch_val(void)
2448 struct drm_i915_private *dev_priv;
2449 unsigned long chipset_val, graphics_val, ret = 0;
2451 lockmgr(&mchdev_lock, LK_EXCLUSIVE);
2454 dev_priv = i915_mch_dev;
2456 chipset_val = i915_chipset_val(dev_priv);
2457 graphics_val = i915_gfx_val(dev_priv);
2459 ret = chipset_val + graphics_val;
2462 lockmgr(&mchdev_lock, LK_RELEASE);
2468 * i915_gpu_raise - raise GPU frequency limit
2470 * Raise the limit; IPS indicates we have thermal headroom.
2472 bool i915_gpu_raise(void)
2474 struct drm_i915_private *dev_priv;
2477 lockmgr(&mchdev_lock, LK_EXCLUSIVE);
2478 if (!i915_mch_dev) {
2482 dev_priv = i915_mch_dev;
2484 if (dev_priv->rps.max_delay > dev_priv->fmax)
2485 dev_priv->rps.max_delay--;
2488 lockmgr(&mchdev_lock, LK_RELEASE);
2494 * i915_gpu_lower - lower GPU frequency limit
2496 * IPS indicates we're close to a thermal limit, so throttle back the GPU
2497 * frequency maximum.
2499 bool i915_gpu_lower(void)
2501 struct drm_i915_private *dev_priv;
2504 lockmgr(&mchdev_lock, LK_EXCLUSIVE);
2505 if (!i915_mch_dev) {
2509 dev_priv = i915_mch_dev;
2511 if (dev_priv->rps.max_delay < dev_priv->rps.min_delay)
2512 dev_priv->rps.max_delay++;
2515 lockmgr(&mchdev_lock, LK_RELEASE);
2521 * i915_gpu_busy - indicate GPU business to IPS
2523 * Tell the IPS driver whether or not the GPU is busy.
2525 bool i915_gpu_busy(void)
2527 struct drm_i915_private *dev_priv;
2530 lockmgr(&mchdev_lock, LK_EXCLUSIVE);
2533 dev_priv = i915_mch_dev;
2535 ret = dev_priv->busy;
2538 lockmgr(&mchdev_lock, LK_RELEASE);
2544 * i915_gpu_turbo_disable - disable graphics turbo
2546 * Disable graphics turbo by resetting the max frequency and setting the
2547 * current frequency to the default.
2549 bool i915_gpu_turbo_disable(void)
2551 struct drm_i915_private *dev_priv;
2554 lockmgr(&mchdev_lock, LK_EXCLUSIVE);
2555 if (!i915_mch_dev) {
2559 dev_priv = i915_mch_dev;
2561 dev_priv->rps.max_delay = dev_priv->fstart;
2563 if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
2567 lockmgr(&mchdev_lock, LK_RELEASE);
2572 void intel_init_emon(struct drm_device *dev)
2574 struct drm_i915_private *dev_priv = dev->dev_private;
2579 /* Disable to program */
2583 /* Program energy weights for various events */
2584 I915_WRITE(SDEW, 0x15040d00);
2585 I915_WRITE(CSIEW0, 0x007f0000);
2586 I915_WRITE(CSIEW1, 0x1e220004);
2587 I915_WRITE(CSIEW2, 0x04000004);
2589 for (i = 0; i < 5; i++)
2590 I915_WRITE(PEW + (i * 4), 0);
2591 for (i = 0; i < 3; i++)
2592 I915_WRITE(DEW + (i * 4), 0);
2594 /* Program P-state weights to account for frequency power adjustment */
2595 for (i = 0; i < 16; i++) {
2596 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
2597 unsigned long freq = intel_pxfreq(pxvidfreq);
2598 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
2603 val *= (freq / 1000);
2605 val /= (127*127*900);
2607 DRM_ERROR("bad pxval: %ld\n", val);
2610 /* Render standby states get 0 weight */
2614 for (i = 0; i < 4; i++) {
2615 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
2616 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
2617 I915_WRITE(PXW + (i * 4), val);
2620 /* Adjust magic regs to magic values (more experimental results) */
2621 I915_WRITE(OGW0, 0);
2622 I915_WRITE(OGW1, 0);
2623 I915_WRITE(EG0, 0x00007f00);
2624 I915_WRITE(EG1, 0x0000000e);
2625 I915_WRITE(EG2, 0x000e0000);
2626 I915_WRITE(EG3, 0x68000300);
2627 I915_WRITE(EG4, 0x42000000);
2628 I915_WRITE(EG5, 0x00140031);
2632 for (i = 0; i < 8; i++)
2633 I915_WRITE(PXWL + (i * 4), 0);
2635 /* Enable PMON + select events */
2636 I915_WRITE(ECR, 0x80000019);
2638 lcfuse = I915_READ(LCFUSE02);
2640 dev_priv->corr = (lcfuse & LCFUSE_HIV_MASK);
2643 void intel_disable_gt_powersave(struct drm_device *dev)
2645 struct drm_i915_private *dev_priv = dev->dev_private;
2647 if (IS_IRONLAKE_M(dev)) {
2648 ironlake_disable_drps(dev);
2649 ironlake_disable_rc6(dev);
2650 } else if (INTEL_INFO(dev)->gen >= 6 && !IS_VALLEYVIEW(dev)) {
2651 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
2652 lockmgr(&dev_priv->rps.hw_lock, LK_EXCLUSIVE);
2653 gen6_disable_rps(dev);
2654 lockmgr(&dev_priv->rps.hw_lock, LK_RELEASE);
2658 static int intel_enable_rc6(struct drm_device *dev)
2661 * Respect the kernel parameter if it is set
2663 if (i915_enable_rc6 >= 0)
2664 return i915_enable_rc6;
2667 * Disable RC6 on Ironlake
2669 if (INTEL_INFO(dev)->gen == 5)
2673 * Enable rc6 on Sandybridge if DMA remapping is disabled
2675 if (INTEL_INFO(dev)->gen == 6) {
2677 "Sandybridge: intel_iommu_enabled %s -- RC6 %sabled\n",
2678 intel_iommu_enabled ? "true" : "false",
2679 !intel_iommu_enabled ? "en" : "dis");
2680 return (intel_iommu_enabled ? 0 : INTEL_RC6_ENABLE);
2682 DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n");
2683 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
2686 void gen6_enable_rps(struct drm_i915_private *dev_priv)
2688 u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
2689 u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
2690 u32 pcu_mbox, rc6_mask = 0;
2692 int cur_freq, min_freq, max_freq;
2696 /* Here begins a magic sequence of register writes to enable
2697 * auto-downclocking.
2699 * Perhaps there might be some value in exposing these to
2702 I915_WRITE(GEN6_RC_STATE, 0);
2704 /* Clear the DBG now so we don't confuse earlier errors */
2705 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
2706 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
2707 I915_WRITE(GTFIFODBG, gtfifodbg);
2710 gen6_gt_force_wake_get(dev_priv);
2712 /* disable the counters and set deterministic thresholds */
2713 I915_WRITE(GEN6_RC_CONTROL, 0);
2715 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
2716 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
2717 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
2718 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
2719 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
2721 for (i = 0; i < I915_NUM_RINGS; i++)
2722 I915_WRITE(RING_MAX_IDLE(dev_priv->ring[i].mmio_base), 10);
2724 I915_WRITE(GEN6_RC_SLEEP, 0);
2725 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
2726 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
2727 I915_WRITE(GEN6_RC6p_THRESHOLD, 100000);
2728 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
2730 rc6_mode = intel_enable_rc6(dev_priv->dev);
2731 if (rc6_mode & INTEL_RC6_ENABLE)
2732 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
2734 if (rc6_mode & INTEL_RC6p_ENABLE)
2735 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
2737 if (rc6_mode & INTEL_RC6pp_ENABLE)
2738 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
2740 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
2741 (rc6_mode & INTEL_RC6_ENABLE) ? "on" : "off",
2742 (rc6_mode & INTEL_RC6p_ENABLE) ? "on" : "off",
2743 (rc6_mode & INTEL_RC6pp_ENABLE) ? "on" : "off");
2745 I915_WRITE(GEN6_RC_CONTROL,
2747 GEN6_RC_CTL_EI_MODE(1) |
2748 GEN6_RC_CTL_HW_ENABLE);
2750 I915_WRITE(GEN6_RPNSWREQ,
2751 GEN6_FREQUENCY(10) |
2753 GEN6_AGGRESSIVE_TURBO);
2754 I915_WRITE(GEN6_RC_VIDEO_FREQ,
2755 GEN6_FREQUENCY(12));
2757 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
2758 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
2761 I915_WRITE(GEN6_RP_UP_THRESHOLD, 10000);
2762 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 1000000);
2763 I915_WRITE(GEN6_RP_UP_EI, 100000);
2764 I915_WRITE(GEN6_RP_DOWN_EI, 5000000);
2765 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
2766 I915_WRITE(GEN6_RP_CONTROL,
2767 GEN6_RP_MEDIA_TURBO |
2768 GEN6_RP_MEDIA_HW_MODE |
2769 GEN6_RP_MEDIA_IS_GFX |
2771 GEN6_RP_UP_BUSY_AVG |
2772 GEN6_RP_DOWN_IDLE_CONT);
2774 if (_intel_wait_for(dev,
2775 (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, 500,
2777 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
2779 I915_WRITE(GEN6_PCODE_DATA, 0);
2780 I915_WRITE(GEN6_PCODE_MAILBOX,
2782 GEN6_PCODE_WRITE_MIN_FREQ_TABLE);
2783 if (_intel_wait_for(dev,
2784 (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, 500,
2786 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
2788 min_freq = (rp_state_cap & 0xff0000) >> 16;
2789 max_freq = rp_state_cap & 0xff;
2790 cur_freq = (gt_perf_status & 0xff00) >> 8;
2792 /* Check for overclock support */
2793 if (_intel_wait_for(dev,
2794 (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, 500,
2796 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
2797 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_READ_OC_PARAMS);
2798 pcu_mbox = I915_READ(GEN6_PCODE_DATA);
2799 if (_intel_wait_for(dev,
2800 (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, 500,
2802 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
2803 if (pcu_mbox & (1<<31)) { /* OC supported */
2804 max_freq = pcu_mbox & 0xff;
2805 DRM_DEBUG("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox * 50);
2808 /* In units of 100MHz */
2809 dev_priv->rps.max_delay = max_freq;
2810 dev_priv->rps.min_delay = min_freq;
2811 dev_priv->rps.cur_delay = cur_freq;
2813 /* requires MSI enabled */
2814 I915_WRITE(GEN6_PMIER,
2815 GEN6_PM_MBOX_EVENT |
2816 GEN6_PM_THERMAL_EVENT |
2817 GEN6_PM_RP_DOWN_TIMEOUT |
2818 GEN6_PM_RP_UP_THRESHOLD |
2819 GEN6_PM_RP_DOWN_THRESHOLD |
2820 GEN6_PM_RP_UP_EI_EXPIRED |
2821 GEN6_PM_RP_DOWN_EI_EXPIRED);
2822 spin_lock(&dev_priv->rps.lock);
2823 WARN_ON(dev_priv->rps.pm_iir != 0);
2824 I915_WRITE(GEN6_PMIMR, 0);
2825 spin_unlock(&dev_priv->rps.lock);
2826 /* enable all PM interrupts */
2827 I915_WRITE(GEN6_PMINTRMSK, 0);
2829 gen6_gt_force_wake_put(dev_priv);
2832 void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
2834 struct drm_device *dev;
2836 int gpu_freq, ia_freq, max_ia_freq;
2837 int scaling_factor = 180;
2840 dev = dev_priv->dev;
2842 max_ia_freq = cpufreq_quick_get_max(0);
2844 * Default to measured freq if none found, PCU will ensure we don't go
2848 max_ia_freq = tsc_freq;
2850 /* Convert from Hz to MHz */
2851 max_ia_freq /= 1000;
2853 tsc_freq = atomic_load_acq_64(&tsc_freq);
2854 max_ia_freq = tsc_freq / 1000 / 1000;
2860 * For each potential GPU frequency, load a ring frequency we'd like
2861 * to use for memory access. We do this by specifying the IA frequency
2862 * the PCU should use as a reference to determine the ring frequency.
2864 for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay;
2866 int diff = dev_priv->rps.max_delay - gpu_freq;
2870 * For GPU frequencies less than 750MHz, just use the lowest
2873 if (gpu_freq < min_freq)
2876 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
2878 ia_freq = (ia_freq + d / 2) / d;
2880 I915_WRITE(GEN6_PCODE_DATA,
2881 (ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT) |
2883 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY |
2884 GEN6_PCODE_WRITE_MIN_FREQ_TABLE);
2885 if (_intel_wait_for(dev,
2886 (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
2888 DRM_ERROR("pcode write of freq table timed out\n");
2896 void ironlake_init_clock_gating(struct drm_device *dev)
2898 struct drm_i915_private *dev_priv = dev->dev_private;
2899 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
2901 /* Required for FBC */
2902 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
2903 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
2904 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
2906 I915_WRITE(PCH_3DCGDIS0,
2907 MARIUNIT_CLOCK_GATE_DISABLE |
2908 SVSMUNIT_CLOCK_GATE_DISABLE);
2909 I915_WRITE(PCH_3DCGDIS1,
2910 VFMUNIT_CLOCK_GATE_DISABLE);
2913 * According to the spec the following bits should be set in
2914 * order to enable memory self-refresh
2915 * The bit 22/21 of 0x42004
2916 * The bit 5 of 0x42020
2917 * The bit 15 of 0x45000
2919 I915_WRITE(ILK_DISPLAY_CHICKEN2,
2920 (I915_READ(ILK_DISPLAY_CHICKEN2) |
2921 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
2922 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
2923 I915_WRITE(DISP_ARB_CTL,
2924 (I915_READ(DISP_ARB_CTL) |
2926 I915_WRITE(WM3_LP_ILK, 0);
2927 I915_WRITE(WM2_LP_ILK, 0);
2928 I915_WRITE(WM1_LP_ILK, 0);
2931 * Based on the document from hardware guys the following bits
2932 * should be set unconditionally in order to enable FBC.
2933 * The bit 22 of 0x42000
2934 * The bit 22 of 0x42004
2935 * The bit 7,8,9 of 0x42020.
2937 if (IS_IRONLAKE_M(dev)) {
2938 I915_WRITE(ILK_DISPLAY_CHICKEN1,
2939 I915_READ(ILK_DISPLAY_CHICKEN1) |
2941 I915_WRITE(ILK_DISPLAY_CHICKEN2,
2942 I915_READ(ILK_DISPLAY_CHICKEN2) |
2946 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
2948 I915_WRITE(ILK_DISPLAY_CHICKEN2,
2949 I915_READ(ILK_DISPLAY_CHICKEN2) |
2950 ILK_ELPIN_409_SELECT);
2951 I915_WRITE(_3D_CHICKEN2,
2952 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
2953 _3D_CHICKEN2_WM_READ_PIPELINED);
2955 /* WaDisableRenderCachePipelinedFlush */
2956 I915_WRITE(CACHE_MODE_0,
2957 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
2959 ibx_init_clock_gating(dev);
2962 void cpt_init_clock_gating(struct drm_device *dev)
2964 struct drm_i915_private *dev_priv = dev->dev_private;
2968 * On Ibex Peak and Cougar Point, we need to disable clock
2969 * gating for the panel power sequencer or it will fail to
2970 * start up when no ports are active.
2972 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
2973 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
2974 DPLS_EDP_PPS_FIX_DIS);
2975 /* The below fixes the weird display corruption, a few pixels shifted
2976 * downward, on (only) LVDS of some HP laptops with IVY.
2979 I915_WRITE(TRANS_CHICKEN2(pipe), TRANS_CHICKEN2_TIMING_OVERRIDE);
2980 /* WADP0ClockGatingDisable */
2981 for_each_pipe(pipe) {
2982 I915_WRITE(TRANS_CHICKEN1(pipe),
2983 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
2987 void gen6_init_clock_gating(struct drm_device *dev)
2989 struct drm_i915_private *dev_priv = dev->dev_private;
2991 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
2993 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
2995 I915_WRITE(ILK_DISPLAY_CHICKEN2,
2996 I915_READ(ILK_DISPLAY_CHICKEN2) |
2997 ILK_ELPIN_409_SELECT);
2999 /* WaDisableHiZPlanesWhenMSAAEnabled */
3000 I915_WRITE(_3D_CHICKEN,
3001 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
3003 /* WaSetupGtModeTdRowDispatch */
3004 if (IS_SNB_GT1(dev))
3005 I915_WRITE(GEN6_GT_MODE,
3006 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE));
3008 I915_WRITE(WM3_LP_ILK, 0);
3009 I915_WRITE(WM2_LP_ILK, 0);
3010 I915_WRITE(WM1_LP_ILK, 0);
3012 I915_WRITE(CACHE_MODE_0,
3013 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
3015 I915_WRITE(GEN6_UCGCTL1,
3016 I915_READ(GEN6_UCGCTL1) |
3017 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
3018 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
3020 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
3021 * gating disable must be set. Failure to set it results in
3022 * flickering pixels due to Z write ordering failures after
3023 * some amount of runtime in the Mesa "fire" demo, and Unigine
3024 * Sanctuary and Tropics, and apparently anything else with
3025 * alpha test or pixel discard.
3027 * According to the spec, bit 11 (RCCUNIT) must also be set,
3028 * but we didn't debug actual testcases to find it out.
3030 * Also apply WaDisableVDSUnitClockGating and
3031 * WaDisableRCPBUnitClockGating.
3033 I915_WRITE(GEN6_UCGCTL2,
3034 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
3035 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
3036 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
3038 /* Bspec says we need to always set all mask bits. */
3039 I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) |
3040 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL);
3043 * According to the spec the following bits should be
3044 * set in order to enable memory self-refresh and fbc:
3045 * The bit21 and bit22 of 0x42000
3046 * The bit21 and bit22 of 0x42004
3047 * The bit5 and bit7 of 0x42020
3048 * The bit14 of 0x70180
3049 * The bit14 of 0x71180
3051 I915_WRITE(ILK_DISPLAY_CHICKEN1,
3052 I915_READ(ILK_DISPLAY_CHICKEN1) |
3053 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
3054 I915_WRITE(ILK_DISPLAY_CHICKEN2,
3055 I915_READ(ILK_DISPLAY_CHICKEN2) |
3056 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
3057 I915_WRITE(ILK_DSPCLK_GATE_D,
3058 I915_READ(ILK_DSPCLK_GATE_D) |
3059 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
3060 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
3062 /* WaMbcDriverBootEnable */
3063 I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) |
3064 GEN6_MBCTL_ENABLE_BOOT_FETCH);
3066 for_each_pipe(pipe) {
3067 I915_WRITE(DSPCNTR(pipe),
3068 I915_READ(DSPCNTR(pipe)) |
3069 DISPPLANE_TRICKLE_FEED_DISABLE);
3070 intel_flush_display_plane(dev_priv, pipe);
3073 /* The default value should be 0x200 according to docs, but the two
3074 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
3075 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff));
3076 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI));
3078 cpt_init_clock_gating(dev);
3081 void ivybridge_init_clock_gating(struct drm_device *dev)
3083 struct drm_i915_private *dev_priv = dev->dev_private;
3085 uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;
3087 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
3089 I915_WRITE(WM3_LP_ILK, 0);
3090 I915_WRITE(WM2_LP_ILK, 0);
3091 I915_WRITE(WM1_LP_ILK, 0);
3093 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
3094 * This implements the WaDisableRCZUnitClockGating workaround.
3096 I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
3098 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
3100 I915_WRITE(IVB_CHICKEN3,
3101 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
3102 CHICKEN3_DGMG_DONE_FIX_DISABLE);
3104 /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
3105 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
3106 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
3108 /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
3109 I915_WRITE(GEN7_L3CNTLREG1,
3110 GEN7_WA_FOR_GEN7_L3_CONTROL);
3111 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
3112 GEN7_WA_L3_CHICKEN_MODE);
3114 /* This is required by WaCatErrorRejectionIssue */
3115 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
3116 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
3117 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
3119 for_each_pipe(pipe) {
3120 I915_WRITE(DSPCNTR(pipe),
3121 I915_READ(DSPCNTR(pipe)) |
3122 DISPPLANE_TRICKLE_FEED_DISABLE);
3123 intel_flush_display_plane(dev_priv, pipe);
3127 void g4x_init_clock_gating(struct drm_device *dev)
3129 struct drm_i915_private *dev_priv = dev->dev_private;
3130 uint32_t dspclk_gate;
3132 I915_WRITE(RENCLK_GATE_D1, 0);
3133 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
3134 GS_UNIT_CLOCK_GATE_DISABLE |
3135 CL_UNIT_CLOCK_GATE_DISABLE);
3136 I915_WRITE(RAMCLK_GATE_D, 0);
3137 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
3138 OVRUNIT_CLOCK_GATE_DISABLE |
3139 OVCUNIT_CLOCK_GATE_DISABLE;
3141 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
3142 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
3145 void crestline_init_clock_gating(struct drm_device *dev)
3147 struct drm_i915_private *dev_priv = dev->dev_private;
3149 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
3150 I915_WRITE(RENCLK_GATE_D2, 0);
3151 I915_WRITE(DSPCLK_GATE_D, 0);
3152 I915_WRITE(RAMCLK_GATE_D, 0);
3153 I915_WRITE16(DEUC, 0);
3156 void broadwater_init_clock_gating(struct drm_device *dev)
3158 struct drm_i915_private *dev_priv = dev->dev_private;
3160 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
3161 I965_RCC_CLOCK_GATE_DISABLE |
3162 I965_RCPB_CLOCK_GATE_DISABLE |
3163 I965_ISC_CLOCK_GATE_DISABLE |
3164 I965_FBC_CLOCK_GATE_DISABLE);
3165 I915_WRITE(RENCLK_GATE_D2, 0);
3168 void gen3_init_clock_gating(struct drm_device *dev)
3170 struct drm_i915_private *dev_priv = dev->dev_private;
3171 u32 dstate = I915_READ(D_STATE);
3173 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
3174 DSTATE_DOT_CLOCK_GATING;
3175 I915_WRITE(D_STATE, dstate);
3178 void i85x_init_clock_gating(struct drm_device *dev)
3180 struct drm_i915_private *dev_priv = dev->dev_private;
3182 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
3185 void i830_init_clock_gating(struct drm_device *dev)
3187 struct drm_i915_private *dev_priv = dev->dev_private;
3189 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
3192 void ibx_init_clock_gating(struct drm_device *dev)
3194 struct drm_i915_private *dev_priv = dev->dev_private;
3197 * On Ibex Peak and Cougar Point, we need to disable clock
3198 * gating for the panel power sequencer or it will fail to
3199 * start up when no ports are active.
3201 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
3204 static void ironlake_teardown_rc6(struct drm_device *dev)
3206 struct drm_i915_private *dev_priv = dev->dev_private;
3208 if (dev_priv->renderctx) {
3209 i915_gem_object_unpin(dev_priv->renderctx);
3210 drm_gem_object_unreference(&dev_priv->renderctx->base);
3211 dev_priv->renderctx = NULL;
3214 if (dev_priv->pwrctx) {
3215 i915_gem_object_unpin(dev_priv->pwrctx);
3216 drm_gem_object_unreference(&dev_priv->pwrctx->base);
3217 dev_priv->pwrctx = NULL;
3221 void ironlake_disable_rc6(struct drm_device *dev)
3223 struct drm_i915_private *dev_priv = dev->dev_private;
3225 if (I915_READ(PWRCTXA)) {
3226 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
3227 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
3228 (void)_intel_wait_for(dev,
3229 ((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
3232 I915_WRITE(PWRCTXA, 0);
3233 POSTING_READ(PWRCTXA);
3235 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3236 POSTING_READ(RSTDBYCTL);
3239 ironlake_teardown_rc6(dev);
3242 static int ironlake_setup_rc6(struct drm_device *dev)
3244 struct drm_i915_private *dev_priv = dev->dev_private;
3246 if (dev_priv->renderctx == NULL)
3247 dev_priv->renderctx = intel_alloc_context_page(dev);
3248 if (!dev_priv->renderctx)
3251 if (dev_priv->pwrctx == NULL)
3252 dev_priv->pwrctx = intel_alloc_context_page(dev);
3253 if (!dev_priv->pwrctx) {
3254 ironlake_teardown_rc6(dev);
3261 void ironlake_enable_rc6(struct drm_device *dev)
3263 struct drm_i915_private *dev_priv = dev->dev_private;
3266 /* rc6 disabled by default due to repeated reports of hanging during
3269 if (!intel_enable_rc6(dev))
3273 ret = ironlake_setup_rc6(dev);
3280 * GPU can automatically power down the render unit if given a page
3283 ret = BEGIN_LP_RING(6);
3285 ironlake_teardown_rc6(dev);
3290 OUT_RING(MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
3291 OUT_RING(MI_SET_CONTEXT);
3292 OUT_RING(dev_priv->renderctx->gtt_offset |
3294 MI_SAVE_EXT_STATE_EN |
3295 MI_RESTORE_EXT_STATE_EN |
3296 MI_RESTORE_INHIBIT);
3297 OUT_RING(MI_SUSPEND_FLUSH);
3303 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
3304 * does an implicit flush, combined with MI_FLUSH above, it should be
3305 * safe to assume that renderctx is valid
3307 ret = intel_wait_ring_idle(LP_RING(dev_priv));
3309 DRM_ERROR("failed to enable ironlake power savings\n");
3310 ironlake_teardown_rc6(dev);
3315 I915_WRITE(PWRCTXA, dev_priv->pwrctx->gtt_offset | PWRCTX_EN);
3316 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3320 void intel_init_clock_gating(struct drm_device *dev)
3322 struct drm_i915_private *dev_priv = dev->dev_private;
3324 dev_priv->display.init_clock_gating(dev);
3326 if (dev_priv->display.init_pch_clock_gating)
3327 dev_priv->display.init_pch_clock_gating(dev);
3330 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
3332 u32 gt_thread_status_mask;
3334 if (IS_HASWELL(dev_priv->dev))
3335 gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW;
3337 gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK;
3339 /* w/a for a sporadic read returning 0 by waiting for the GT
3340 * thread to wake up.
3342 if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500))
3343 DRM_ERROR("GT thread status wait timed out\n");
3346 static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
3348 I915_WRITE_NOTRACE(FORCEWAKE, 0);
3349 POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
3352 static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
3356 if (IS_HASWELL(dev_priv->dev))
3357 forcewake_ack = FORCEWAKE_ACK_HSW;
3359 forcewake_ack = FORCEWAKE_ACK;
3361 if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0,
3362 FORCEWAKE_ACK_TIMEOUT_MS))
3363 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
3365 I915_WRITE_NOTRACE(FORCEWAKE, FORCEWAKE_KERNEL);
3366 POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
3368 if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1),
3369 FORCEWAKE_ACK_TIMEOUT_MS))
3370 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
3372 __gen6_gt_wait_for_thread_c0(dev_priv);
3375 static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
3377 I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
3378 /* something from same cacheline, but !FORCEWAKE_MT */
3379 POSTING_READ(ECOBUS);
3382 static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
3387 while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1))
3390 I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 1);
3391 POSTING_READ(FORCEWAKE_MT);
3394 while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1) == 0)
3399 * Generally this is called implicitly by the register read function. However,
3400 * if some sequence requires the GT to not power down then this function should
3401 * be called at the beginning of the sequence followed by a call to
3402 * gen6_gt_force_wake_put() at the end of the sequence.
3404 void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
3407 lockmgr(&dev_priv->gt_lock, LK_EXCLUSIVE);
3408 if (dev_priv->forcewake_count++ == 0)
3409 dev_priv->gt.force_wake_get(dev_priv);
3410 lockmgr(&dev_priv->gt_lock, LK_RELEASE);
3413 void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
3416 gtfifodbg = I915_READ_NOTRACE(GTFIFODBG);
3417 if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK,
3418 "MMIO read or write has been dropped %x\n", gtfifodbg))
3419 I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK);
3422 static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
3424 I915_WRITE_NOTRACE(FORCEWAKE, 0);
3425 /* something from same cacheline, but !FORCEWAKE */
3426 POSTING_READ(ECOBUS);
3427 gen6_gt_check_fifodbg(dev_priv);
3430 static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv)
3432 I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
3433 /* something from same cacheline, but !FORCEWAKE_MT */
3434 POSTING_READ(ECOBUS);
3435 gen6_gt_check_fifodbg(dev_priv);
3439 * see gen6_gt_force_wake_get()
3441 void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
3443 lockmgr(&dev_priv->gt_lock, LK_EXCLUSIVE);
3444 if (--dev_priv->forcewake_count == 0)
3445 dev_priv->gt.force_wake_put(dev_priv);
3446 lockmgr(&dev_priv->gt_lock, LK_RELEASE);
3449 int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
3453 if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
3455 u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
3456 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
3458 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
3460 if (loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES) {
3461 kprintf("%s loop\n", __func__);
3464 dev_priv->gt_fifo_count = fifo;
3466 dev_priv->gt_fifo_count--;
3471 static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
3473 I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff));
3474 /* something from same cacheline, but !FORCEWAKE_VLV */
3475 POSTING_READ(FORCEWAKE_ACK_VLV);
3478 static void vlv_force_wake_get(struct drm_i915_private *dev_priv)
3480 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1) == 0,
3481 FORCEWAKE_ACK_TIMEOUT_MS))
3482 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
3484 I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
3486 if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1),
3487 FORCEWAKE_ACK_TIMEOUT_MS))
3488 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
3490 __gen6_gt_wait_for_thread_c0(dev_priv);
3493 static void vlv_force_wake_put(struct drm_i915_private *dev_priv)
3495 I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
3496 /* something from same cacheline, but !FORCEWAKE_VLV */
3497 POSTING_READ(FORCEWAKE_ACK_VLV);
3498 gen6_gt_check_fifodbg(dev_priv);
3501 void intel_gt_reset(struct drm_device *dev)
3503 struct drm_i915_private *dev_priv = dev->dev_private;
3505 if (IS_VALLEYVIEW(dev)) {
3506 vlv_force_wake_reset(dev_priv);
3507 } else if (INTEL_INFO(dev)->gen >= 6) {
3508 __gen6_gt_force_wake_reset(dev_priv);
3509 if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
3510 __gen6_gt_force_wake_mt_reset(dev_priv);
3514 void intel_gt_init(struct drm_device *dev)
3516 struct drm_i915_private *dev_priv = dev->dev_private;
3518 lockinit(&dev_priv->gt_lock, "915gt", 0, LK_CANRECURSE);
3520 intel_gt_reset(dev);
3522 if (IS_VALLEYVIEW(dev)) {
3523 dev_priv->gt.force_wake_get = vlv_force_wake_get;
3524 dev_priv->gt.force_wake_put = vlv_force_wake_put;
3525 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
3526 dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get;
3527 dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put;
3528 } else if (IS_GEN6(dev)) {
3529 dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get;
3530 dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put;
3533 INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
3534 intel_gen6_powersave_work);