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 <linux/vgaarb.h>
34 #include <drm/i915_powerwell.h>
35 #include <linux/pm_runtime.h>
38 * RC6 is a special power stage which allows the GPU to enter an very
39 * low-voltage mode when idle, using down to 0V while at this stage. This
40 * stage is entered automatically when the GPU is idle when RC6 support is
41 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
43 * There are different RC6 modes available in Intel GPU, which differentiate
44 * among each other with the latency required to enter and leave RC6 and
45 * voltage consumed by the GPU in different states.
47 * The combination of the following flags define which states GPU is allowed
48 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
49 * RC6pp is deepest RC6. Their support by hardware varies according to the
50 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
51 * which brings the most power savings; deeper states save more power, but
52 * require higher latency to switch to and wake up.
54 #define INTEL_RC6_ENABLE (1<<0)
55 #define INTEL_RC6p_ENABLE (1<<1)
56 #define INTEL_RC6pp_ENABLE (1<<2)
58 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
59 * framebuffer contents in-memory, aiming at reducing the required bandwidth
60 * during in-memory transfers and, therefore, reduce the power packet.
62 * The benefits of FBC are mostly visible with solid backgrounds and
63 * variation-less patterns.
65 * FBC-related functionality can be enabled by the means of the
66 * i915.i915_enable_fbc parameter
69 static void i8xx_disable_fbc(struct drm_device *dev)
71 struct drm_i915_private *dev_priv = dev->dev_private;
74 /* Disable compression */
75 fbc_ctl = I915_READ(FBC_CONTROL);
76 if ((fbc_ctl & FBC_CTL_EN) == 0)
79 fbc_ctl &= ~FBC_CTL_EN;
80 I915_WRITE(FBC_CONTROL, fbc_ctl);
82 /* Wait for compressing bit to clear */
83 if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
84 DRM_DEBUG_KMS("FBC idle timed out\n");
88 DRM_DEBUG_KMS("disabled FBC\n");
91 static void i8xx_enable_fbc(struct drm_crtc *crtc)
93 struct drm_device *dev = crtc->dev;
94 struct drm_i915_private *dev_priv = dev->dev_private;
95 struct drm_framebuffer *fb = crtc->fb;
96 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
97 struct drm_i915_gem_object *obj = intel_fb->obj;
98 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
103 cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE;
104 if (fb->pitches[0] < cfb_pitch)
105 cfb_pitch = fb->pitches[0];
107 /* FBC_CTL wants 32B or 64B units */
109 cfb_pitch = (cfb_pitch / 32) - 1;
111 cfb_pitch = (cfb_pitch / 64) - 1;
112 plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
115 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
116 I915_WRITE(FBC_TAG + (i * 4), 0);
122 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
124 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
125 I915_WRITE(FBC_FENCE_OFF, crtc->y);
129 fbc_ctl = I915_READ(FBC_CONTROL);
130 fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT;
131 fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC;
133 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
134 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
135 fbc_ctl |= obj->fence_reg;
136 I915_WRITE(FBC_CONTROL, fbc_ctl);
138 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ",
139 cfb_pitch, crtc->y, plane_name(intel_crtc->plane));
142 static bool i8xx_fbc_enabled(struct drm_device *dev)
144 struct drm_i915_private *dev_priv = dev->dev_private;
146 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
149 static void g4x_enable_fbc(struct drm_crtc *crtc)
151 struct drm_device *dev = crtc->dev;
152 struct drm_i915_private *dev_priv = dev->dev_private;
153 struct drm_framebuffer *fb = crtc->fb;
154 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
155 struct drm_i915_gem_object *obj = intel_fb->obj;
156 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
157 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
160 dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
161 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
162 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
164 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
167 I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
169 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
172 static void g4x_disable_fbc(struct drm_device *dev)
174 struct drm_i915_private *dev_priv = dev->dev_private;
177 /* Disable compression */
178 dpfc_ctl = I915_READ(DPFC_CONTROL);
179 if (dpfc_ctl & DPFC_CTL_EN) {
180 dpfc_ctl &= ~DPFC_CTL_EN;
181 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
183 DRM_DEBUG_KMS("disabled FBC\n");
187 static bool g4x_fbc_enabled(struct drm_device *dev)
189 struct drm_i915_private *dev_priv = dev->dev_private;
191 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
194 static void sandybridge_blit_fbc_update(struct drm_device *dev)
196 struct drm_i915_private *dev_priv = dev->dev_private;
199 /* Make sure blitter notifies FBC of writes */
201 /* Blitter is part of Media powerwell on VLV. No impact of
202 * his param in other platforms for now */
203 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA);
205 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
206 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
207 GEN6_BLITTER_LOCK_SHIFT;
208 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
209 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
210 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
211 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
212 GEN6_BLITTER_LOCK_SHIFT);
213 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
214 POSTING_READ(GEN6_BLITTER_ECOSKPD);
216 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA);
219 static void ironlake_enable_fbc(struct drm_crtc *crtc)
221 struct drm_device *dev = crtc->dev;
222 struct drm_i915_private *dev_priv = dev->dev_private;
223 struct drm_framebuffer *fb = crtc->fb;
224 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
225 struct drm_i915_gem_object *obj = intel_fb->obj;
226 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
227 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
230 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
231 dpfc_ctl &= DPFC_RESERVED;
232 dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
233 /* Set persistent mode for front-buffer rendering, ala X. */
234 dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE;
235 dpfc_ctl |= DPFC_CTL_FENCE_EN;
237 dpfc_ctl |= obj->fence_reg;
238 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
240 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
241 I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
243 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
246 I915_WRITE(SNB_DPFC_CTL_SA,
247 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
248 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
249 sandybridge_blit_fbc_update(dev);
252 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
255 static void ironlake_disable_fbc(struct drm_device *dev)
257 struct drm_i915_private *dev_priv = dev->dev_private;
260 /* Disable compression */
261 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
262 if (dpfc_ctl & DPFC_CTL_EN) {
263 dpfc_ctl &= ~DPFC_CTL_EN;
264 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
266 DRM_DEBUG_KMS("disabled FBC\n");
270 static bool ironlake_fbc_enabled(struct drm_device *dev)
272 struct drm_i915_private *dev_priv = dev->dev_private;
274 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
277 static void gen7_enable_fbc(struct drm_crtc *crtc)
279 struct drm_device *dev = crtc->dev;
280 struct drm_i915_private *dev_priv = dev->dev_private;
281 struct drm_framebuffer *fb = crtc->fb;
282 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
283 struct drm_i915_gem_object *obj = intel_fb->obj;
284 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
286 I915_WRITE(IVB_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj));
288 I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X |
289 IVB_DPFC_CTL_FENCE_EN |
290 intel_crtc->plane << IVB_DPFC_CTL_PLANE_SHIFT);
292 if (IS_IVYBRIDGE(dev)) {
293 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
294 I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
296 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
297 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe),
298 HSW_BYPASS_FBC_QUEUE);
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 %c\n", plane_name(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);
336 dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane;
337 dev_priv->fbc.fb_id = work->crtc->fb->base.id;
338 dev_priv->fbc.y = work->crtc->y;
341 dev_priv->fbc.fbc_work = NULL;
343 mutex_unlock(&dev->struct_mutex);
348 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
350 if (dev_priv->fbc.fbc_work == NULL)
353 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
355 /* Synchronisation is provided by struct_mutex and checking of
356 * dev_priv->fbc.fbc_work, so we can perform the cancellation
357 * entirely asynchronously.
359 if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work))
360 /* tasklet was killed before being run, clean up */
361 kfree(dev_priv->fbc.fbc_work);
363 /* Mark the work as no longer wanted so that if it does
364 * wake-up (because the work was already running and waiting
365 * for our mutex), it will discover that is no longer
368 dev_priv->fbc.fbc_work = NULL;
371 static void intel_enable_fbc(struct drm_crtc *crtc)
373 struct intel_fbc_work *work;
374 struct drm_device *dev = crtc->dev;
375 struct drm_i915_private *dev_priv = dev->dev_private;
377 if (!dev_priv->display.enable_fbc)
380 intel_cancel_fbc_work(dev_priv);
382 work = kzalloc(sizeof(*work), GFP_KERNEL);
384 DRM_ERROR("Failed to allocate FBC work structure\n");
385 dev_priv->display.enable_fbc(crtc);
391 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
393 dev_priv->fbc.fbc_work = work;
395 /* Delay the actual enabling to let pageflipping cease and the
396 * display to settle before starting the compression. Note that
397 * this delay also serves a second purpose: it allows for a
398 * vblank to pass after disabling the FBC before we attempt
399 * to modify the control registers.
401 * A more complicated solution would involve tracking vblanks
402 * following the termination of the page-flipping sequence
403 * and indeed performing the enable as a co-routine and not
404 * waiting synchronously upon the vblank.
406 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
408 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
411 void intel_disable_fbc(struct drm_device *dev)
413 struct drm_i915_private *dev_priv = dev->dev_private;
415 intel_cancel_fbc_work(dev_priv);
417 if (!dev_priv->display.disable_fbc)
420 dev_priv->display.disable_fbc(dev);
421 dev_priv->fbc.plane = -1;
424 static bool set_no_fbc_reason(struct drm_i915_private *dev_priv,
425 enum no_fbc_reason reason)
427 if (dev_priv->fbc.no_fbc_reason == reason)
430 dev_priv->fbc.no_fbc_reason = reason;
435 * intel_update_fbc - enable/disable FBC as needed
436 * @dev: the drm_device
438 * Set up the framebuffer compression hardware at mode set time. We
439 * enable it if possible:
440 * - plane A only (on pre-965)
441 * - no pixel mulitply/line duplication
442 * - no alpha buffer discard
444 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
446 * We can't assume that any compression will take place (worst case),
447 * so the compressed buffer has to be the same size as the uncompressed
448 * one. It also must reside (along with the line length buffer) in
451 * We need to enable/disable FBC on a global basis.
453 void intel_update_fbc(struct drm_device *dev)
455 struct drm_i915_private *dev_priv = dev->dev_private;
456 struct drm_crtc *crtc = NULL, *tmp_crtc;
457 struct intel_crtc *intel_crtc;
458 struct drm_framebuffer *fb;
459 struct intel_framebuffer *intel_fb;
460 struct drm_i915_gem_object *obj;
461 const struct drm_display_mode *adjusted_mode;
462 unsigned int max_width, max_height;
465 set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED);
469 if (!i915_powersave) {
470 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
471 DRM_DEBUG_KMS("fbc disabled per module param\n");
476 * If FBC is already on, we just have to verify that we can
477 * keep it that way...
478 * Need to disable if:
479 * - more than one pipe is active
480 * - changing FBC params (stride, fence, mode)
481 * - new fb is too large to fit in compressed buffer
482 * - going to an unsupported config (interlace, pixel multiply, etc.)
484 list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
485 if (intel_crtc_active(tmp_crtc) &&
486 to_intel_crtc(tmp_crtc)->primary_enabled) {
488 if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES))
489 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
496 if (!crtc || crtc->fb == NULL) {
497 if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT))
498 DRM_DEBUG_KMS("no output, disabling\n");
502 intel_crtc = to_intel_crtc(crtc);
504 intel_fb = to_intel_framebuffer(fb);
506 adjusted_mode = &intel_crtc->config.adjusted_mode;
508 if (i915_enable_fbc < 0 &&
509 INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) {
510 if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
511 DRM_DEBUG_KMS("disabled per chip default\n");
514 if (!i915_enable_fbc) {
515 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
516 DRM_DEBUG_KMS("fbc disabled per module param\n");
519 if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ||
520 (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
521 if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
522 DRM_DEBUG_KMS("mode incompatible with compression, "
527 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
534 if (intel_crtc->config.pipe_src_w > max_width ||
535 intel_crtc->config.pipe_src_h > max_height) {
536 if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE))
537 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
540 if ((INTEL_INFO(dev)->gen < 4 || IS_HASWELL(dev)) &&
541 intel_crtc->plane != PLANE_A) {
542 if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE))
543 DRM_DEBUG_KMS("plane not A, disabling compression\n");
547 /* The use of a CPU fence is mandatory in order to detect writes
548 * by the CPU to the scanout and trigger updates to the FBC.
550 if (obj->tiling_mode != I915_TILING_X ||
551 obj->fence_reg == I915_FENCE_REG_NONE) {
552 if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED))
553 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
557 /* If the kernel debugger is active, always disable compression */
561 if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) {
562 if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL))
563 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
567 /* If the scanout has not changed, don't modify the FBC settings.
568 * Note that we make the fundamental assumption that the fb->obj
569 * cannot be unpinned (and have its GTT offset and fence revoked)
570 * without first being decoupled from the scanout and FBC disabled.
572 if (dev_priv->fbc.plane == intel_crtc->plane &&
573 dev_priv->fbc.fb_id == fb->base.id &&
574 dev_priv->fbc.y == crtc->y)
577 if (intel_fbc_enabled(dev)) {
578 /* We update FBC along two paths, after changing fb/crtc
579 * configuration (modeswitching) and after page-flipping
580 * finishes. For the latter, we know that not only did
581 * we disable the FBC at the start of the page-flip
582 * sequence, but also more than one vblank has passed.
584 * For the former case of modeswitching, it is possible
585 * to switch between two FBC valid configurations
586 * instantaneously so we do need to disable the FBC
587 * before we can modify its control registers. We also
588 * have to wait for the next vblank for that to take
589 * effect. However, since we delay enabling FBC we can
590 * assume that a vblank has passed since disabling and
591 * that we can safely alter the registers in the deferred
594 * In the scenario that we go from a valid to invalid
595 * and then back to valid FBC configuration we have
596 * no strict enforcement that a vblank occurred since
597 * disabling the FBC. However, along all current pipe
598 * disabling paths we do need to wait for a vblank at
599 * some point. And we wait before enabling FBC anyway.
601 DRM_DEBUG_KMS("disabling active FBC for update\n");
602 intel_disable_fbc(dev);
605 intel_enable_fbc(crtc);
606 dev_priv->fbc.no_fbc_reason = FBC_OK;
610 /* Multiple disables should be harmless */
611 if (intel_fbc_enabled(dev)) {
612 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
613 intel_disable_fbc(dev);
615 i915_gem_stolen_cleanup_compression(dev);
618 static void i915_pineview_get_mem_freq(struct drm_device *dev)
620 drm_i915_private_t *dev_priv = dev->dev_private;
623 tmp = I915_READ(CLKCFG);
625 switch (tmp & CLKCFG_FSB_MASK) {
627 dev_priv->fsb_freq = 533; /* 133*4 */
630 dev_priv->fsb_freq = 800; /* 200*4 */
633 dev_priv->fsb_freq = 667; /* 167*4 */
636 dev_priv->fsb_freq = 400; /* 100*4 */
640 switch (tmp & CLKCFG_MEM_MASK) {
642 dev_priv->mem_freq = 533;
645 dev_priv->mem_freq = 667;
648 dev_priv->mem_freq = 800;
652 /* detect pineview DDR3 setting */
653 tmp = I915_READ(CSHRDDR3CTL);
654 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
657 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
659 drm_i915_private_t *dev_priv = dev->dev_private;
662 ddrpll = I915_READ16(DDRMPLL1);
663 csipll = I915_READ16(CSIPLL0);
665 switch (ddrpll & 0xff) {
667 dev_priv->mem_freq = 800;
670 dev_priv->mem_freq = 1066;
673 dev_priv->mem_freq = 1333;
676 dev_priv->mem_freq = 1600;
679 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
681 dev_priv->mem_freq = 0;
685 dev_priv->ips.r_t = dev_priv->mem_freq;
687 switch (csipll & 0x3ff) {
689 dev_priv->fsb_freq = 3200;
692 dev_priv->fsb_freq = 3733;
695 dev_priv->fsb_freq = 4266;
698 dev_priv->fsb_freq = 4800;
701 dev_priv->fsb_freq = 5333;
704 dev_priv->fsb_freq = 5866;
707 dev_priv->fsb_freq = 6400;
710 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
712 dev_priv->fsb_freq = 0;
716 if (dev_priv->fsb_freq == 3200) {
717 dev_priv->ips.c_m = 0;
718 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
719 dev_priv->ips.c_m = 1;
721 dev_priv->ips.c_m = 2;
725 static const struct cxsr_latency cxsr_latency_table[] = {
726 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
727 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
728 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
729 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
730 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
732 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
733 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
734 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
735 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
736 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
738 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
739 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
740 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
741 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
742 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
744 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
745 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
746 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
747 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
748 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
750 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
751 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
752 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
753 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
754 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
756 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
757 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
758 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
759 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
760 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
763 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
768 const struct cxsr_latency *latency;
771 if (fsb == 0 || mem == 0)
774 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
775 latency = &cxsr_latency_table[i];
776 if (is_desktop == latency->is_desktop &&
777 is_ddr3 == latency->is_ddr3 &&
778 fsb == latency->fsb_freq && mem == latency->mem_freq)
782 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
787 static void pineview_disable_cxsr(struct drm_device *dev)
789 struct drm_i915_private *dev_priv = dev->dev_private;
791 /* deactivate cxsr */
792 I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
796 * Latency for FIFO fetches is dependent on several factors:
797 * - memory configuration (speed, channels)
799 * - current MCH state
800 * It can be fairly high in some situations, so here we assume a fairly
801 * pessimal value. It's a tradeoff between extra memory fetches (if we
802 * set this value too high, the FIFO will fetch frequently to stay full)
803 * and power consumption (set it too low to save power and we might see
804 * FIFO underruns and display "flicker").
806 * A value of 5us seems to be a good balance; safe for very low end
807 * platforms but not overly aggressive on lower latency configs.
809 static const int latency_ns = 5000;
811 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
813 struct drm_i915_private *dev_priv = dev->dev_private;
814 uint32_t dsparb = I915_READ(DSPARB);
817 size = dsparb & 0x7f;
819 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
821 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
822 plane ? "B" : "A", size);
827 static int i830_get_fifo_size(struct drm_device *dev, int plane)
829 struct drm_i915_private *dev_priv = dev->dev_private;
830 uint32_t dsparb = I915_READ(DSPARB);
833 size = dsparb & 0x1ff;
835 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
836 size >>= 1; /* Convert to cachelines */
838 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
839 plane ? "B" : "A", size);
844 static int i845_get_fifo_size(struct drm_device *dev, int plane)
846 struct drm_i915_private *dev_priv = dev->dev_private;
847 uint32_t dsparb = I915_READ(DSPARB);
850 size = dsparb & 0x7f;
851 size >>= 2; /* Convert to cachelines */
853 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
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 i830_wm_info = {
945 static const struct intel_watermark_params i845_wm_info = {
954 * intel_calculate_wm - calculate watermark level
955 * @clock_in_khz: pixel clock
956 * @wm: chip FIFO params
957 * @pixel_size: display pixel size
958 * @latency_ns: memory latency for the platform
960 * Calculate the watermark level (the level at which the display plane will
961 * start fetching from memory again). Each chip has a different display
962 * FIFO size and allocation, so the caller needs to figure that out and pass
963 * in the correct intel_watermark_params structure.
965 * As the pixel clock runs, the FIFO will be drained at a rate that depends
966 * on the pixel size. When it reaches the watermark level, it'll start
967 * fetching FIFO line sized based chunks from memory until the FIFO fills
968 * past the watermark point. If the FIFO drains completely, a FIFO underrun
969 * will occur, and a display engine hang could result.
971 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
972 const struct intel_watermark_params *wm,
975 unsigned long latency_ns)
977 long entries_required, wm_size;
980 * Note: we need to make sure we don't overflow for various clock &
982 * clocks go from a few thousand to several hundred thousand.
983 * latency is usually a few thousand
985 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
987 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
989 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
991 wm_size = fifo_size - (entries_required + wm->guard_size);
993 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
995 /* Don't promote wm_size to unsigned... */
996 if (wm_size > (long)wm->max_wm)
997 wm_size = wm->max_wm;
999 wm_size = wm->default_wm;
1003 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
1005 struct drm_crtc *crtc, *enabled = NULL;
1007 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1008 if (intel_crtc_active(crtc)) {
1018 static void pineview_update_wm(struct drm_crtc *unused_crtc)
1020 struct drm_device *dev = unused_crtc->dev;
1021 struct drm_i915_private *dev_priv = dev->dev_private;
1022 struct drm_crtc *crtc;
1023 const struct cxsr_latency *latency;
1027 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
1028 dev_priv->fsb_freq, dev_priv->mem_freq);
1030 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1031 pineview_disable_cxsr(dev);
1035 crtc = single_enabled_crtc(dev);
1037 const struct drm_display_mode *adjusted_mode;
1038 int pixel_size = crtc->fb->bits_per_pixel / 8;
1041 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1042 clock = adjusted_mode->crtc_clock;
1045 wm = intel_calculate_wm(clock, &pineview_display_wm,
1046 pineview_display_wm.fifo_size,
1047 pixel_size, latency->display_sr);
1048 reg = I915_READ(DSPFW1);
1049 reg &= ~DSPFW_SR_MASK;
1050 reg |= wm << DSPFW_SR_SHIFT;
1051 I915_WRITE(DSPFW1, reg);
1052 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
1055 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
1056 pineview_display_wm.fifo_size,
1057 pixel_size, latency->cursor_sr);
1058 reg = I915_READ(DSPFW3);
1059 reg &= ~DSPFW_CURSOR_SR_MASK;
1060 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
1061 I915_WRITE(DSPFW3, reg);
1063 /* Display HPLL off SR */
1064 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
1065 pineview_display_hplloff_wm.fifo_size,
1066 pixel_size, latency->display_hpll_disable);
1067 reg = I915_READ(DSPFW3);
1068 reg &= ~DSPFW_HPLL_SR_MASK;
1069 reg |= wm & DSPFW_HPLL_SR_MASK;
1070 I915_WRITE(DSPFW3, reg);
1072 /* cursor HPLL off SR */
1073 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
1074 pineview_display_hplloff_wm.fifo_size,
1075 pixel_size, latency->cursor_hpll_disable);
1076 reg = I915_READ(DSPFW3);
1077 reg &= ~DSPFW_HPLL_CURSOR_MASK;
1078 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
1079 I915_WRITE(DSPFW3, reg);
1080 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
1084 I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
1085 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1087 pineview_disable_cxsr(dev);
1088 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1092 static bool g4x_compute_wm0(struct drm_device *dev,
1094 const struct intel_watermark_params *display,
1095 int display_latency_ns,
1096 const struct intel_watermark_params *cursor,
1097 int cursor_latency_ns,
1101 struct drm_crtc *crtc;
1102 const struct drm_display_mode *adjusted_mode;
1103 int htotal, hdisplay, clock, pixel_size;
1104 int line_time_us, line_count;
1105 int entries, tlb_miss;
1107 crtc = intel_get_crtc_for_plane(dev, plane);
1108 if (!intel_crtc_active(crtc)) {
1109 *cursor_wm = cursor->guard_size;
1110 *plane_wm = display->guard_size;
1114 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1115 clock = adjusted_mode->crtc_clock;
1116 htotal = adjusted_mode->crtc_htotal;
1117 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1118 pixel_size = crtc->fb->bits_per_pixel / 8;
1120 /* Use the small buffer method to calculate plane watermark */
1121 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1122 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
1124 entries += tlb_miss;
1125 entries = DIV_ROUND_UP(entries, display->cacheline_size);
1126 *plane_wm = entries + display->guard_size;
1127 if (*plane_wm > (int)display->max_wm)
1128 *plane_wm = display->max_wm;
1130 /* Use the large buffer method to calculate cursor watermark */
1131 line_time_us = ((htotal * 1000) / clock);
1132 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
1133 entries = line_count * 64 * pixel_size;
1134 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
1136 entries += tlb_miss;
1137 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1138 *cursor_wm = entries + cursor->guard_size;
1139 if (*cursor_wm > (int)cursor->max_wm)
1140 *cursor_wm = (int)cursor->max_wm;
1146 * Check the wm result.
1148 * If any calculated watermark values is larger than the maximum value that
1149 * can be programmed into the associated watermark register, that watermark
1152 static bool g4x_check_srwm(struct drm_device *dev,
1153 int display_wm, int cursor_wm,
1154 const struct intel_watermark_params *display,
1155 const struct intel_watermark_params *cursor)
1157 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1158 display_wm, cursor_wm);
1160 if (display_wm > display->max_wm) {
1161 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1162 display_wm, display->max_wm);
1166 if (cursor_wm > cursor->max_wm) {
1167 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1168 cursor_wm, cursor->max_wm);
1172 if (!(display_wm || cursor_wm)) {
1173 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1180 static bool g4x_compute_srwm(struct drm_device *dev,
1183 const struct intel_watermark_params *display,
1184 const struct intel_watermark_params *cursor,
1185 int *display_wm, int *cursor_wm)
1187 struct drm_crtc *crtc;
1188 const struct drm_display_mode *adjusted_mode;
1189 int hdisplay, htotal, pixel_size, clock;
1190 unsigned long line_time_us;
1191 int line_count, line_size;
1196 *display_wm = *cursor_wm = 0;
1200 crtc = intel_get_crtc_for_plane(dev, plane);
1201 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1202 clock = adjusted_mode->crtc_clock;
1203 htotal = adjusted_mode->crtc_htotal;
1204 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1205 pixel_size = crtc->fb->bits_per_pixel / 8;
1207 line_time_us = (htotal * 1000) / clock;
1208 line_count = (latency_ns / line_time_us + 1000) / 1000;
1209 line_size = hdisplay * pixel_size;
1211 /* Use the minimum of the small and large buffer method for primary */
1212 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1213 large = line_count * line_size;
1215 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1216 *display_wm = entries + display->guard_size;
1218 /* calculate the self-refresh watermark for display cursor */
1219 entries = line_count * pixel_size * 64;
1220 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1221 *cursor_wm = entries + cursor->guard_size;
1223 return g4x_check_srwm(dev,
1224 *display_wm, *cursor_wm,
1228 static bool vlv_compute_drain_latency(struct drm_device *dev,
1230 int *plane_prec_mult,
1232 int *cursor_prec_mult,
1235 struct drm_crtc *crtc;
1236 int clock, pixel_size;
1239 crtc = intel_get_crtc_for_plane(dev, plane);
1240 if (!intel_crtc_active(crtc))
1243 clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock;
1244 pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */
1246 entries = (clock / 1000) * pixel_size;
1247 *plane_prec_mult = (entries > 256) ?
1248 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1249 *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) *
1252 entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */
1253 *cursor_prec_mult = (entries > 256) ?
1254 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1255 *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4);
1261 * Update drain latency registers of memory arbiter
1263 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1264 * to be programmed. Each plane has a drain latency multiplier and a drain
1268 static void vlv_update_drain_latency(struct drm_device *dev)
1270 struct drm_i915_private *dev_priv = dev->dev_private;
1271 int planea_prec, planea_dl, planeb_prec, planeb_dl;
1272 int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl;
1273 int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is
1276 /* For plane A, Cursor A */
1277 if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl,
1278 &cursor_prec_mult, &cursora_dl)) {
1279 cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1280 DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16;
1281 planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1282 DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16;
1284 I915_WRITE(VLV_DDL1, cursora_prec |
1285 (cursora_dl << DDL_CURSORA_SHIFT) |
1286 planea_prec | planea_dl);
1289 /* For plane B, Cursor B */
1290 if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl,
1291 &cursor_prec_mult, &cursorb_dl)) {
1292 cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1293 DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16;
1294 planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1295 DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16;
1297 I915_WRITE(VLV_DDL2, cursorb_prec |
1298 (cursorb_dl << DDL_CURSORB_SHIFT) |
1299 planeb_prec | planeb_dl);
1303 #define single_plane_enabled(mask) is_power_of_2(mask)
1305 static void valleyview_update_wm(struct drm_crtc *crtc)
1307 struct drm_device *dev = crtc->dev;
1308 static const int sr_latency_ns = 12000;
1309 struct drm_i915_private *dev_priv = dev->dev_private;
1310 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1311 int plane_sr, cursor_sr;
1312 int ignore_plane_sr, ignore_cursor_sr;
1313 unsigned int enabled = 0;
1315 vlv_update_drain_latency(dev);
1317 if (g4x_compute_wm0(dev, PIPE_A,
1318 &valleyview_wm_info, latency_ns,
1319 &valleyview_cursor_wm_info, latency_ns,
1320 &planea_wm, &cursora_wm))
1321 enabled |= 1 << PIPE_A;
1323 if (g4x_compute_wm0(dev, PIPE_B,
1324 &valleyview_wm_info, latency_ns,
1325 &valleyview_cursor_wm_info, latency_ns,
1326 &planeb_wm, &cursorb_wm))
1327 enabled |= 1 << PIPE_B;
1329 if (single_plane_enabled(enabled) &&
1330 g4x_compute_srwm(dev, ffs(enabled) - 1,
1332 &valleyview_wm_info,
1333 &valleyview_cursor_wm_info,
1334 &plane_sr, &ignore_cursor_sr) &&
1335 g4x_compute_srwm(dev, ffs(enabled) - 1,
1337 &valleyview_wm_info,
1338 &valleyview_cursor_wm_info,
1339 &ignore_plane_sr, &cursor_sr)) {
1340 I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN);
1342 I915_WRITE(FW_BLC_SELF_VLV,
1343 I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN);
1344 plane_sr = cursor_sr = 0;
1347 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1348 planea_wm, cursora_wm,
1349 planeb_wm, cursorb_wm,
1350 plane_sr, cursor_sr);
1353 (plane_sr << DSPFW_SR_SHIFT) |
1354 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1355 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1358 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1359 (cursora_wm << DSPFW_CURSORA_SHIFT));
1361 (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) |
1362 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1365 static void g4x_update_wm(struct drm_crtc *crtc)
1367 struct drm_device *dev = crtc->dev;
1368 static const int sr_latency_ns = 12000;
1369 struct drm_i915_private *dev_priv = dev->dev_private;
1370 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1371 int plane_sr, cursor_sr;
1372 unsigned int enabled = 0;
1374 if (g4x_compute_wm0(dev, PIPE_A,
1375 &g4x_wm_info, latency_ns,
1376 &g4x_cursor_wm_info, latency_ns,
1377 &planea_wm, &cursora_wm))
1378 enabled |= 1 << PIPE_A;
1380 if (g4x_compute_wm0(dev, PIPE_B,
1381 &g4x_wm_info, latency_ns,
1382 &g4x_cursor_wm_info, latency_ns,
1383 &planeb_wm, &cursorb_wm))
1384 enabled |= 1 << PIPE_B;
1386 if (single_plane_enabled(enabled) &&
1387 g4x_compute_srwm(dev, ffs(enabled) - 1,
1390 &g4x_cursor_wm_info,
1391 &plane_sr, &cursor_sr)) {
1392 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1394 I915_WRITE(FW_BLC_SELF,
1395 I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN);
1396 plane_sr = cursor_sr = 0;
1399 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1400 planea_wm, cursora_wm,
1401 planeb_wm, cursorb_wm,
1402 plane_sr, cursor_sr);
1405 (plane_sr << DSPFW_SR_SHIFT) |
1406 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1407 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1410 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1411 (cursora_wm << DSPFW_CURSORA_SHIFT));
1412 /* HPLL off in SR has some issues on G4x... disable it */
1414 (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) |
1415 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1418 static void i965_update_wm(struct drm_crtc *unused_crtc)
1420 struct drm_device *dev = unused_crtc->dev;
1421 struct drm_i915_private *dev_priv = dev->dev_private;
1422 struct drm_crtc *crtc;
1426 /* Calc sr entries for one plane configs */
1427 crtc = single_enabled_crtc(dev);
1429 /* self-refresh has much higher latency */
1430 static const int sr_latency_ns = 12000;
1431 const struct drm_display_mode *adjusted_mode =
1432 &to_intel_crtc(crtc)->config.adjusted_mode;
1433 int clock = adjusted_mode->crtc_clock;
1434 int htotal = adjusted_mode->crtc_htotal;
1435 int hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1436 int pixel_size = crtc->fb->bits_per_pixel / 8;
1437 unsigned long line_time_us;
1440 line_time_us = ((htotal * 1000) / clock);
1442 /* Use ns/us then divide to preserve precision */
1443 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1444 pixel_size * hdisplay;
1445 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
1446 srwm = I965_FIFO_SIZE - entries;
1450 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1453 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1455 entries = DIV_ROUND_UP(entries,
1456 i965_cursor_wm_info.cacheline_size);
1457 cursor_sr = i965_cursor_wm_info.fifo_size -
1458 (entries + i965_cursor_wm_info.guard_size);
1460 if (cursor_sr > i965_cursor_wm_info.max_wm)
1461 cursor_sr = i965_cursor_wm_info.max_wm;
1463 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1464 "cursor %d\n", srwm, cursor_sr);
1466 if (IS_CRESTLINE(dev))
1467 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1469 /* Turn off self refresh if both pipes are enabled */
1470 if (IS_CRESTLINE(dev))
1471 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
1475 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1478 /* 965 has limitations... */
1479 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
1480 (8 << 16) | (8 << 8) | (8 << 0));
1481 I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
1482 /* update cursor SR watermark */
1483 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1486 static void i9xx_update_wm(struct drm_crtc *unused_crtc)
1488 struct drm_device *dev = unused_crtc->dev;
1489 struct drm_i915_private *dev_priv = dev->dev_private;
1490 const struct intel_watermark_params *wm_info;
1495 int planea_wm, planeb_wm;
1496 struct drm_crtc *crtc, *enabled = NULL;
1499 wm_info = &i945_wm_info;
1500 else if (!IS_GEN2(dev))
1501 wm_info = &i915_wm_info;
1503 wm_info = &i830_wm_info;
1505 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
1506 crtc = intel_get_crtc_for_plane(dev, 0);
1507 if (intel_crtc_active(crtc)) {
1508 const struct drm_display_mode *adjusted_mode;
1509 int cpp = crtc->fb->bits_per_pixel / 8;
1513 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1514 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1515 wm_info, fifo_size, cpp,
1519 planea_wm = fifo_size - wm_info->guard_size;
1521 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
1522 crtc = intel_get_crtc_for_plane(dev, 1);
1523 if (intel_crtc_active(crtc)) {
1524 const struct drm_display_mode *adjusted_mode;
1525 int cpp = crtc->fb->bits_per_pixel / 8;
1529 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1530 planeb_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1531 wm_info, fifo_size, cpp,
1533 if (enabled == NULL)
1538 planeb_wm = fifo_size - wm_info->guard_size;
1540 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1542 if (IS_I915GM(dev) && enabled) {
1543 struct intel_framebuffer *fb;
1545 fb = to_intel_framebuffer(enabled->fb);
1547 /* self-refresh seems busted with untiled */
1548 if (fb->obj->tiling_mode == I915_TILING_NONE)
1553 * Overlay gets an aggressive default since video jitter is bad.
1557 /* Play safe and disable self-refresh before adjusting watermarks. */
1558 if (IS_I945G(dev) || IS_I945GM(dev))
1559 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0);
1560 else if (IS_I915GM(dev))
1561 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_SELF_EN));
1563 /* Calc sr entries for one plane configs */
1564 if (HAS_FW_BLC(dev) && enabled) {
1565 /* self-refresh has much higher latency */
1566 static const int sr_latency_ns = 6000;
1567 const struct drm_display_mode *adjusted_mode =
1568 &to_intel_crtc(enabled)->config.adjusted_mode;
1569 int clock = adjusted_mode->crtc_clock;
1570 int htotal = adjusted_mode->crtc_htotal;
1571 int hdisplay = to_intel_crtc(enabled)->config.pipe_src_w;
1572 int pixel_size = enabled->fb->bits_per_pixel / 8;
1573 unsigned long line_time_us;
1576 line_time_us = (htotal * 1000) / clock;
1578 /* Use ns/us then divide to preserve precision */
1579 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1580 pixel_size * hdisplay;
1581 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
1582 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1583 srwm = wm_info->fifo_size - entries;
1587 if (IS_I945G(dev) || IS_I945GM(dev))
1588 I915_WRITE(FW_BLC_SELF,
1589 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1590 else if (IS_I915GM(dev))
1591 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1594 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1595 planea_wm, planeb_wm, cwm, srwm);
1597 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1598 fwater_hi = (cwm & 0x1f);
1600 /* Set request length to 8 cachelines per fetch */
1601 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1602 fwater_hi = fwater_hi | (1 << 8);
1604 I915_WRITE(FW_BLC, fwater_lo);
1605 I915_WRITE(FW_BLC2, fwater_hi);
1607 if (HAS_FW_BLC(dev)) {
1609 if (IS_I945G(dev) || IS_I945GM(dev))
1610 I915_WRITE(FW_BLC_SELF,
1611 FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
1612 else if (IS_I915GM(dev))
1613 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_SELF_EN));
1614 DRM_DEBUG_KMS("memory self refresh enabled\n");
1616 DRM_DEBUG_KMS("memory self refresh disabled\n");
1620 static void i845_update_wm(struct drm_crtc *unused_crtc)
1622 struct drm_device *dev = unused_crtc->dev;
1623 struct drm_i915_private *dev_priv = dev->dev_private;
1624 struct drm_crtc *crtc;
1625 const struct drm_display_mode *adjusted_mode;
1629 crtc = single_enabled_crtc(dev);
1633 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1634 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1636 dev_priv->display.get_fifo_size(dev, 0),
1638 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1639 fwater_lo |= (3<<8) | planea_wm;
1641 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1643 I915_WRITE(FW_BLC, fwater_lo);
1646 static uint32_t ilk_pipe_pixel_rate(struct drm_device *dev,
1647 struct drm_crtc *crtc)
1649 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1650 uint32_t pixel_rate;
1652 pixel_rate = intel_crtc->config.adjusted_mode.crtc_clock;
1654 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
1655 * adjust the pixel_rate here. */
1657 if (intel_crtc->config.pch_pfit.enabled) {
1658 uint64_t pipe_w, pipe_h, pfit_w, pfit_h;
1659 uint32_t pfit_size = intel_crtc->config.pch_pfit.size;
1661 pipe_w = intel_crtc->config.pipe_src_w;
1662 pipe_h = intel_crtc->config.pipe_src_h;
1663 pfit_w = (pfit_size >> 16) & 0xFFFF;
1664 pfit_h = pfit_size & 0xFFFF;
1665 if (pipe_w < pfit_w)
1667 if (pipe_h < pfit_h)
1670 pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h,
1677 /* latency must be in 0.1us units. */
1678 static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
1683 if (WARN(latency == 0, "Latency value missing\n"))
1686 ret = (uint64_t) pixel_rate * bytes_per_pixel * latency;
1687 ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
1692 /* latency must be in 0.1us units. */
1693 static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
1694 uint32_t horiz_pixels, uint8_t bytes_per_pixel,
1699 if (WARN(latency == 0, "Latency value missing\n"))
1702 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
1703 ret = (ret + 1) * horiz_pixels * bytes_per_pixel;
1704 ret = DIV_ROUND_UP(ret, 64) + 2;
1708 static uint32_t ilk_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels,
1709 uint8_t bytes_per_pixel)
1711 return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2;
1714 struct ilk_pipe_wm_parameters {
1716 uint32_t pipe_htotal;
1717 uint32_t pixel_rate;
1718 struct intel_plane_wm_parameters pri;
1719 struct intel_plane_wm_parameters spr;
1720 struct intel_plane_wm_parameters cur;
1723 struct ilk_wm_maximums {
1730 /* used in computing the new watermarks state */
1731 struct intel_wm_config {
1732 unsigned int num_pipes_active;
1733 bool sprites_enabled;
1734 bool sprites_scaled;
1738 * For both WM_PIPE and WM_LP.
1739 * mem_value must be in 0.1us units.
1741 static uint32_t ilk_compute_pri_wm(const struct ilk_pipe_wm_parameters *params,
1745 uint32_t method1, method2;
1747 if (!params->active || !params->pri.enabled)
1750 method1 = ilk_wm_method1(params->pixel_rate,
1751 params->pri.bytes_per_pixel,
1757 method2 = ilk_wm_method2(params->pixel_rate,
1758 params->pipe_htotal,
1759 params->pri.horiz_pixels,
1760 params->pri.bytes_per_pixel,
1763 return min(method1, method2);
1767 * For both WM_PIPE and WM_LP.
1768 * mem_value must be in 0.1us units.
1770 static uint32_t ilk_compute_spr_wm(const struct ilk_pipe_wm_parameters *params,
1773 uint32_t method1, method2;
1775 if (!params->active || !params->spr.enabled)
1778 method1 = ilk_wm_method1(params->pixel_rate,
1779 params->spr.bytes_per_pixel,
1781 method2 = ilk_wm_method2(params->pixel_rate,
1782 params->pipe_htotal,
1783 params->spr.horiz_pixels,
1784 params->spr.bytes_per_pixel,
1786 return min(method1, method2);
1790 * For both WM_PIPE and WM_LP.
1791 * mem_value must be in 0.1us units.
1793 static uint32_t ilk_compute_cur_wm(const struct ilk_pipe_wm_parameters *params,
1796 if (!params->active || !params->cur.enabled)
1799 return ilk_wm_method2(params->pixel_rate,
1800 params->pipe_htotal,
1801 params->cur.horiz_pixels,
1802 params->cur.bytes_per_pixel,
1806 /* Only for WM_LP. */
1807 static uint32_t ilk_compute_fbc_wm(const struct ilk_pipe_wm_parameters *params,
1810 if (!params->active || !params->pri.enabled)
1813 return ilk_wm_fbc(pri_val,
1814 params->pri.horiz_pixels,
1815 params->pri.bytes_per_pixel);
1818 static unsigned int ilk_display_fifo_size(const struct drm_device *dev)
1820 if (INTEL_INFO(dev)->gen >= 8)
1822 else if (INTEL_INFO(dev)->gen >= 7)
1828 /* Calculate the maximum primary/sprite plane watermark */
1829 static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
1831 const struct intel_wm_config *config,
1832 enum intel_ddb_partitioning ddb_partitioning,
1835 unsigned int fifo_size = ilk_display_fifo_size(dev);
1838 /* if sprites aren't enabled, sprites get nothing */
1839 if (is_sprite && !config->sprites_enabled)
1842 /* HSW allows LP1+ watermarks even with multiple pipes */
1843 if (level == 0 || config->num_pipes_active > 1) {
1844 fifo_size /= INTEL_INFO(dev)->num_pipes;
1847 * For some reason the non self refresh
1848 * FIFO size is only half of the self
1849 * refresh FIFO size on ILK/SNB.
1851 if (INTEL_INFO(dev)->gen <= 6)
1855 if (config->sprites_enabled) {
1856 /* level 0 is always calculated with 1:1 split */
1857 if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) {
1866 /* clamp to max that the registers can hold */
1867 if (INTEL_INFO(dev)->gen >= 8)
1868 max = level == 0 ? 255 : 2047;
1869 else if (INTEL_INFO(dev)->gen >= 7)
1870 /* IVB/HSW primary/sprite plane watermarks */
1871 max = level == 0 ? 127 : 1023;
1872 else if (!is_sprite)
1873 /* ILK/SNB primary plane watermarks */
1874 max = level == 0 ? 127 : 511;
1876 /* ILK/SNB sprite plane watermarks */
1877 max = level == 0 ? 63 : 255;
1879 return min(fifo_size, max);
1882 /* Calculate the maximum cursor plane watermark */
1883 static unsigned int ilk_cursor_wm_max(const struct drm_device *dev,
1885 const struct intel_wm_config *config)
1887 /* HSW LP1+ watermarks w/ multiple pipes */
1888 if (level > 0 && config->num_pipes_active > 1)
1891 /* otherwise just report max that registers can hold */
1892 if (INTEL_INFO(dev)->gen >= 7)
1893 return level == 0 ? 63 : 255;
1895 return level == 0 ? 31 : 63;
1898 /* Calculate the maximum FBC watermark */
1899 static unsigned int ilk_fbc_wm_max(struct drm_device *dev)
1901 /* max that registers can hold */
1902 if (INTEL_INFO(dev)->gen >= 8)
1908 static void ilk_compute_wm_maximums(struct drm_device *dev,
1910 const struct intel_wm_config *config,
1911 enum intel_ddb_partitioning ddb_partitioning,
1912 struct ilk_wm_maximums *max)
1914 max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false);
1915 max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true);
1916 max->cur = ilk_cursor_wm_max(dev, level, config);
1917 max->fbc = ilk_fbc_wm_max(dev);
1920 static bool ilk_validate_wm_level(int level,
1921 const struct ilk_wm_maximums *max,
1922 struct intel_wm_level *result)
1926 /* already determined to be invalid? */
1927 if (!result->enable)
1930 result->enable = result->pri_val <= max->pri &&
1931 result->spr_val <= max->spr &&
1932 result->cur_val <= max->cur;
1934 ret = result->enable;
1937 * HACK until we can pre-compute everything,
1938 * and thus fail gracefully if LP0 watermarks
1941 if (level == 0 && !result->enable) {
1942 if (result->pri_val > max->pri)
1943 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
1944 level, result->pri_val, max->pri);
1945 if (result->spr_val > max->spr)
1946 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
1947 level, result->spr_val, max->spr);
1948 if (result->cur_val > max->cur)
1949 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
1950 level, result->cur_val, max->cur);
1952 result->pri_val = min_t(uint32_t, result->pri_val, max->pri);
1953 result->spr_val = min_t(uint32_t, result->spr_val, max->spr);
1954 result->cur_val = min_t(uint32_t, result->cur_val, max->cur);
1955 result->enable = true;
1961 static void ilk_compute_wm_level(struct drm_i915_private *dev_priv,
1963 const struct ilk_pipe_wm_parameters *p,
1964 struct intel_wm_level *result)
1966 uint16_t pri_latency = dev_priv->wm.pri_latency[level];
1967 uint16_t spr_latency = dev_priv->wm.spr_latency[level];
1968 uint16_t cur_latency = dev_priv->wm.cur_latency[level];
1970 /* WM1+ latency values stored in 0.5us units */
1977 result->pri_val = ilk_compute_pri_wm(p, pri_latency, level);
1978 result->spr_val = ilk_compute_spr_wm(p, spr_latency);
1979 result->cur_val = ilk_compute_cur_wm(p, cur_latency);
1980 result->fbc_val = ilk_compute_fbc_wm(p, result->pri_val);
1981 result->enable = true;
1985 hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
1987 struct drm_i915_private *dev_priv = dev->dev_private;
1988 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1989 struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
1990 u32 linetime, ips_linetime;
1992 if (!intel_crtc_active(crtc))
1995 /* The WM are computed with base on how long it takes to fill a single
1996 * row at the given clock rate, multiplied by 8.
1998 linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
2000 ips_linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
2001 intel_ddi_get_cdclk_freq(dev_priv));
2003 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
2004 PIPE_WM_LINETIME_TIME(linetime);
2007 static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[5])
2009 struct drm_i915_private *dev_priv = dev->dev_private;
2011 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2012 uint64_t sskpd = I915_READ64(MCH_SSKPD);
2014 wm[0] = (sskpd >> 56) & 0xFF;
2016 wm[0] = sskpd & 0xF;
2017 wm[1] = (sskpd >> 4) & 0xFF;
2018 wm[2] = (sskpd >> 12) & 0xFF;
2019 wm[3] = (sskpd >> 20) & 0x1FF;
2020 wm[4] = (sskpd >> 32) & 0x1FF;
2021 } else if (INTEL_INFO(dev)->gen >= 6) {
2022 uint32_t sskpd = I915_READ(MCH_SSKPD);
2024 wm[0] = (sskpd >> SSKPD_WM0_SHIFT) & SSKPD_WM_MASK;
2025 wm[1] = (sskpd >> SSKPD_WM1_SHIFT) & SSKPD_WM_MASK;
2026 wm[2] = (sskpd >> SSKPD_WM2_SHIFT) & SSKPD_WM_MASK;
2027 wm[3] = (sskpd >> SSKPD_WM3_SHIFT) & SSKPD_WM_MASK;
2028 } else if (INTEL_INFO(dev)->gen >= 5) {
2029 uint32_t mltr = I915_READ(MLTR_ILK);
2031 /* ILK primary LP0 latency is 700 ns */
2033 wm[1] = (mltr >> MLTR_WM1_SHIFT) & ILK_SRLT_MASK;
2034 wm[2] = (mltr >> MLTR_WM2_SHIFT) & ILK_SRLT_MASK;
2038 static void intel_fixup_spr_wm_latency(struct drm_device *dev, uint16_t wm[5])
2040 /* ILK sprite LP0 latency is 1300 ns */
2041 if (INTEL_INFO(dev)->gen == 5)
2045 static void intel_fixup_cur_wm_latency(struct drm_device *dev, uint16_t wm[5])
2047 /* ILK cursor LP0 latency is 1300 ns */
2048 if (INTEL_INFO(dev)->gen == 5)
2051 /* WaDoubleCursorLP3Latency:ivb */
2052 if (IS_IVYBRIDGE(dev))
2056 static int ilk_wm_max_level(const struct drm_device *dev)
2058 /* how many WM levels are we expecting */
2059 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2061 else if (INTEL_INFO(dev)->gen >= 6)
2067 static void intel_print_wm_latency(struct drm_device *dev,
2069 const uint16_t wm[5])
2071 int level, max_level = ilk_wm_max_level(dev);
2073 for (level = 0; level <= max_level; level++) {
2074 unsigned int latency = wm[level];
2077 DRM_ERROR("%s WM%d latency not provided\n",
2082 /* WM1+ latency values in 0.5us units */
2086 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2087 name, level, wm[level],
2088 latency / 10, latency % 10);
2092 static void intel_setup_wm_latency(struct drm_device *dev)
2094 struct drm_i915_private *dev_priv = dev->dev_private;
2096 intel_read_wm_latency(dev, dev_priv->wm.pri_latency);
2098 memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency,
2099 sizeof(dev_priv->wm.pri_latency));
2100 memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency,
2101 sizeof(dev_priv->wm.pri_latency));
2103 intel_fixup_spr_wm_latency(dev, dev_priv->wm.spr_latency);
2104 intel_fixup_cur_wm_latency(dev, dev_priv->wm.cur_latency);
2106 intel_print_wm_latency(dev, "Primary", dev_priv->wm.pri_latency);
2107 intel_print_wm_latency(dev, "Sprite", dev_priv->wm.spr_latency);
2108 intel_print_wm_latency(dev, "Cursor", dev_priv->wm.cur_latency);
2111 static void ilk_compute_wm_parameters(struct drm_crtc *crtc,
2112 struct ilk_pipe_wm_parameters *p,
2113 struct intel_wm_config *config)
2115 struct drm_device *dev = crtc->dev;
2116 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2117 enum pipe pipe = intel_crtc->pipe;
2118 struct drm_plane *plane;
2120 p->active = intel_crtc_active(crtc);
2122 p->pipe_htotal = intel_crtc->config.adjusted_mode.crtc_htotal;
2123 p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc);
2124 p->pri.bytes_per_pixel = crtc->fb->bits_per_pixel / 8;
2125 p->cur.bytes_per_pixel = 4;
2126 p->pri.horiz_pixels = intel_crtc->config.pipe_src_w;
2127 p->cur.horiz_pixels = 64;
2128 /* TODO: for now, assume primary and cursor planes are always enabled. */
2129 p->pri.enabled = true;
2130 p->cur.enabled = true;
2133 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
2134 config->num_pipes_active += intel_crtc_active(crtc);
2136 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
2137 struct intel_plane *intel_plane = to_intel_plane(plane);
2139 if (intel_plane->pipe == pipe)
2140 p->spr = intel_plane->wm;
2142 config->sprites_enabled |= intel_plane->wm.enabled;
2143 config->sprites_scaled |= intel_plane->wm.scaled;
2147 /* Compute new watermarks for the pipe */
2148 static bool intel_compute_pipe_wm(struct drm_crtc *crtc,
2149 const struct ilk_pipe_wm_parameters *params,
2150 struct intel_pipe_wm *pipe_wm)
2152 struct drm_device *dev = crtc->dev;
2153 struct drm_i915_private *dev_priv = dev->dev_private;
2154 int level, max_level = ilk_wm_max_level(dev);
2155 /* LP0 watermark maximums depend on this pipe alone */
2156 struct intel_wm_config config = {
2157 .num_pipes_active = 1,
2158 .sprites_enabled = params->spr.enabled,
2159 .sprites_scaled = params->spr.scaled,
2161 struct ilk_wm_maximums max;
2163 /* LP0 watermarks always use 1/2 DDB partitioning */
2164 ilk_compute_wm_maximums(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
2166 /* ILK/SNB: LP2+ watermarks only w/o sprites */
2167 if (INTEL_INFO(dev)->gen <= 6 && params->spr.enabled)
2170 /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
2171 if (params->spr.scaled)
2174 for (level = 0; level <= max_level; level++)
2175 ilk_compute_wm_level(dev_priv, level, params,
2176 &pipe_wm->wm[level]);
2178 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2179 pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
2181 /* At least LP0 must be valid */
2182 return ilk_validate_wm_level(0, &max, &pipe_wm->wm[0]);
2186 * Merge the watermarks from all active pipes for a specific level.
2188 static void ilk_merge_wm_level(struct drm_device *dev,
2190 struct intel_wm_level *ret_wm)
2192 const struct intel_crtc *intel_crtc;
2194 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
2195 const struct intel_wm_level *wm =
2196 &intel_crtc->wm.active.wm[level];
2201 ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
2202 ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
2203 ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
2204 ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
2207 ret_wm->enable = true;
2211 * Merge all low power watermarks for all active pipes.
2213 static void ilk_wm_merge(struct drm_device *dev,
2214 const struct intel_wm_config *config,
2215 const struct ilk_wm_maximums *max,
2216 struct intel_pipe_wm *merged)
2218 int level, max_level = ilk_wm_max_level(dev);
2220 /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */
2221 if ((INTEL_INFO(dev)->gen <= 6 || IS_IVYBRIDGE(dev)) &&
2222 config->num_pipes_active > 1)
2225 /* ILK: FBC WM must be disabled always */
2226 merged->fbc_wm_enabled = INTEL_INFO(dev)->gen >= 6;
2228 /* merge each WM1+ level */
2229 for (level = 1; level <= max_level; level++) {
2230 struct intel_wm_level *wm = &merged->wm[level];
2232 ilk_merge_wm_level(dev, level, wm);
2234 if (!ilk_validate_wm_level(level, max, wm))
2238 * The spec says it is preferred to disable
2239 * FBC WMs instead of disabling a WM level.
2241 if (wm->fbc_val > max->fbc) {
2242 merged->fbc_wm_enabled = false;
2247 /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */
2249 * FIXME this is racy. FBC might get enabled later.
2250 * What we should check here is whether FBC can be
2251 * enabled sometime later.
2253 if (IS_GEN5(dev) && !merged->fbc_wm_enabled && intel_fbc_enabled(dev)) {
2254 for (level = 2; level <= max_level; level++) {
2255 struct intel_wm_level *wm = &merged->wm[level];
2262 static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm)
2264 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2265 return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable);
2268 /* The value we need to program into the WM_LPx latency field */
2269 static unsigned int ilk_wm_lp_latency(struct drm_device *dev, int level)
2271 struct drm_i915_private *dev_priv = dev->dev_private;
2273 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2276 return dev_priv->wm.pri_latency[level];
2279 static void ilk_compute_wm_results(struct drm_device *dev,
2280 const struct intel_pipe_wm *merged,
2281 enum intel_ddb_partitioning partitioning,
2282 struct ilk_wm_values *results)
2284 struct intel_crtc *intel_crtc;
2287 results->enable_fbc_wm = merged->fbc_wm_enabled;
2288 results->partitioning = partitioning;
2290 /* LP1+ register values */
2291 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2292 const struct intel_wm_level *r;
2294 level = ilk_wm_lp_to_level(wm_lp, merged);
2296 r = &merged->wm[level];
2300 results->wm_lp[wm_lp - 1] = WM3_LP_EN |
2301 (ilk_wm_lp_latency(dev, level) << WM1_LP_LATENCY_SHIFT) |
2302 (r->pri_val << WM1_LP_SR_SHIFT) |
2305 if (INTEL_INFO(dev)->gen >= 8)
2306 results->wm_lp[wm_lp - 1] |=
2307 r->fbc_val << WM1_LP_FBC_SHIFT_BDW;
2309 results->wm_lp[wm_lp - 1] |=
2310 r->fbc_val << WM1_LP_FBC_SHIFT;
2312 if (INTEL_INFO(dev)->gen <= 6 && r->spr_val) {
2313 WARN_ON(wm_lp != 1);
2314 results->wm_lp_spr[wm_lp - 1] = WM1S_LP_EN | r->spr_val;
2316 results->wm_lp_spr[wm_lp - 1] = r->spr_val;
2319 /* LP0 register values */
2320 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
2321 enum pipe pipe = intel_crtc->pipe;
2322 const struct intel_wm_level *r =
2323 &intel_crtc->wm.active.wm[0];
2325 if (WARN_ON(!r->enable))
2328 results->wm_linetime[pipe] = intel_crtc->wm.active.linetime;
2330 results->wm_pipe[pipe] =
2331 (r->pri_val << WM0_PIPE_PLANE_SHIFT) |
2332 (r->spr_val << WM0_PIPE_SPRITE_SHIFT) |
2337 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2338 * case both are at the same level. Prefer r1 in case they're the same. */
2339 static struct intel_pipe_wm *ilk_find_best_result(struct drm_device *dev,
2340 struct intel_pipe_wm *r1,
2341 struct intel_pipe_wm *r2)
2343 int level, max_level = ilk_wm_max_level(dev);
2344 int level1 = 0, level2 = 0;
2346 for (level = 1; level <= max_level; level++) {
2347 if (r1->wm[level].enable)
2349 if (r2->wm[level].enable)
2353 if (level1 == level2) {
2354 if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled)
2358 } else if (level1 > level2) {
2365 /* dirty bits used to track which watermarks need changes */
2366 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2367 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2368 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2369 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2370 #define WM_DIRTY_FBC (1 << 24)
2371 #define WM_DIRTY_DDB (1 << 25)
2373 static unsigned int ilk_compute_wm_dirty(struct drm_device *dev,
2374 const struct ilk_wm_values *old,
2375 const struct ilk_wm_values *new)
2377 unsigned int dirty = 0;
2381 for_each_pipe(pipe) {
2382 if (old->wm_linetime[pipe] != new->wm_linetime[pipe]) {
2383 dirty |= WM_DIRTY_LINETIME(pipe);
2384 /* Must disable LP1+ watermarks too */
2385 dirty |= WM_DIRTY_LP_ALL;
2388 if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) {
2389 dirty |= WM_DIRTY_PIPE(pipe);
2390 /* Must disable LP1+ watermarks too */
2391 dirty |= WM_DIRTY_LP_ALL;
2395 if (old->enable_fbc_wm != new->enable_fbc_wm) {
2396 dirty |= WM_DIRTY_FBC;
2397 /* Must disable LP1+ watermarks too */
2398 dirty |= WM_DIRTY_LP_ALL;
2401 if (old->partitioning != new->partitioning) {
2402 dirty |= WM_DIRTY_DDB;
2403 /* Must disable LP1+ watermarks too */
2404 dirty |= WM_DIRTY_LP_ALL;
2407 /* LP1+ watermarks already deemed dirty, no need to continue */
2408 if (dirty & WM_DIRTY_LP_ALL)
2411 /* Find the lowest numbered LP1+ watermark in need of an update... */
2412 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2413 if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] ||
2414 old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1])
2418 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2419 for (; wm_lp <= 3; wm_lp++)
2420 dirty |= WM_DIRTY_LP(wm_lp);
2425 static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv,
2428 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2429 bool changed = false;
2431 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM1_LP_SR_EN) {
2432 previous->wm_lp[2] &= ~WM1_LP_SR_EN;
2433 I915_WRITE(WM3_LP_ILK, previous->wm_lp[2]);
2436 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM1_LP_SR_EN) {
2437 previous->wm_lp[1] &= ~WM1_LP_SR_EN;
2438 I915_WRITE(WM2_LP_ILK, previous->wm_lp[1]);
2441 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM1_LP_SR_EN) {
2442 previous->wm_lp[0] &= ~WM1_LP_SR_EN;
2443 I915_WRITE(WM1_LP_ILK, previous->wm_lp[0]);
2448 * Don't touch WM1S_LP_EN here.
2449 * Doing so could cause underruns.
2456 * The spec says we shouldn't write when we don't need, because every write
2457 * causes WMs to be re-evaluated, expending some power.
2459 static void ilk_write_wm_values(struct drm_i915_private *dev_priv,
2460 struct ilk_wm_values *results)
2462 struct drm_device *dev = dev_priv->dev;
2463 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2467 dirty = ilk_compute_wm_dirty(dev, previous, results);
2471 _ilk_disable_lp_wm(dev_priv, dirty);
2473 if (dirty & WM_DIRTY_PIPE(PIPE_A))
2474 I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]);
2475 if (dirty & WM_DIRTY_PIPE(PIPE_B))
2476 I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]);
2477 if (dirty & WM_DIRTY_PIPE(PIPE_C))
2478 I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]);
2480 if (dirty & WM_DIRTY_LINETIME(PIPE_A))
2481 I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]);
2482 if (dirty & WM_DIRTY_LINETIME(PIPE_B))
2483 I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]);
2484 if (dirty & WM_DIRTY_LINETIME(PIPE_C))
2485 I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]);
2487 if (dirty & WM_DIRTY_DDB) {
2488 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2489 val = I915_READ(WM_MISC);
2490 if (results->partitioning == INTEL_DDB_PART_1_2)
2491 val &= ~WM_MISC_DATA_PARTITION_5_6;
2493 val |= WM_MISC_DATA_PARTITION_5_6;
2494 I915_WRITE(WM_MISC, val);
2496 val = I915_READ(DISP_ARB_CTL2);
2497 if (results->partitioning == INTEL_DDB_PART_1_2)
2498 val &= ~DISP_DATA_PARTITION_5_6;
2500 val |= DISP_DATA_PARTITION_5_6;
2501 I915_WRITE(DISP_ARB_CTL2, val);
2505 if (dirty & WM_DIRTY_FBC) {
2506 val = I915_READ(DISP_ARB_CTL);
2507 if (results->enable_fbc_wm)
2508 val &= ~DISP_FBC_WM_DIS;
2510 val |= DISP_FBC_WM_DIS;
2511 I915_WRITE(DISP_ARB_CTL, val);
2514 if (dirty & WM_DIRTY_LP(1) &&
2515 previous->wm_lp_spr[0] != results->wm_lp_spr[0])
2516 I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]);
2518 if (INTEL_INFO(dev)->gen >= 7) {
2519 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1])
2520 I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]);
2521 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2])
2522 I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]);
2525 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0])
2526 I915_WRITE(WM1_LP_ILK, results->wm_lp[0]);
2527 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1])
2528 I915_WRITE(WM2_LP_ILK, results->wm_lp[1]);
2529 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2])
2530 I915_WRITE(WM3_LP_ILK, results->wm_lp[2]);
2532 dev_priv->wm.hw = *results;
2535 static bool ilk_disable_lp_wm(struct drm_device *dev)
2537 struct drm_i915_private *dev_priv = dev->dev_private;
2539 return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
2542 static void ilk_update_wm(struct drm_crtc *crtc)
2544 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2545 struct drm_device *dev = crtc->dev;
2546 struct drm_i915_private *dev_priv = dev->dev_private;
2547 struct ilk_wm_maximums max;
2548 struct ilk_pipe_wm_parameters params = {};
2549 struct ilk_wm_values results = {};
2550 enum intel_ddb_partitioning partitioning;
2551 struct intel_pipe_wm pipe_wm = {};
2552 struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
2553 struct intel_wm_config config = {};
2555 ilk_compute_wm_parameters(crtc, ¶ms, &config);
2557 intel_compute_pipe_wm(crtc, ¶ms, &pipe_wm);
2559 if (!memcmp(&intel_crtc->wm.active, &pipe_wm, sizeof(pipe_wm)))
2562 intel_crtc->wm.active = pipe_wm;
2564 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
2565 ilk_wm_merge(dev, &config, &max, &lp_wm_1_2);
2567 /* 5/6 split only in single pipe config on IVB+ */
2568 if (INTEL_INFO(dev)->gen >= 7 &&
2569 config.num_pipes_active == 1 && config.sprites_enabled) {
2570 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
2571 ilk_wm_merge(dev, &config, &max, &lp_wm_5_6);
2573 best_lp_wm = ilk_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
2575 best_lp_wm = &lp_wm_1_2;
2578 partitioning = (best_lp_wm == &lp_wm_1_2) ?
2579 INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
2581 ilk_compute_wm_results(dev, best_lp_wm, partitioning, &results);
2583 ilk_write_wm_values(dev_priv, &results);
2586 static void ilk_update_sprite_wm(struct drm_plane *plane,
2587 struct drm_crtc *crtc,
2588 uint32_t sprite_width, int pixel_size,
2589 bool enabled, bool scaled)
2591 struct drm_device *dev = plane->dev;
2592 struct intel_plane *intel_plane = to_intel_plane(plane);
2594 intel_plane->wm.enabled = enabled;
2595 intel_plane->wm.scaled = scaled;
2596 intel_plane->wm.horiz_pixels = sprite_width;
2597 intel_plane->wm.bytes_per_pixel = pixel_size;
2600 * IVB workaround: must disable low power watermarks for at least
2601 * one frame before enabling scaling. LP watermarks can be re-enabled
2602 * when scaling is disabled.
2604 * WaCxSRDisabledForSpriteScaling:ivb
2606 if (IS_IVYBRIDGE(dev) && scaled && ilk_disable_lp_wm(dev))
2607 intel_wait_for_vblank(dev, intel_plane->pipe);
2609 ilk_update_wm(crtc);
2612 static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc)
2614 struct drm_device *dev = crtc->dev;
2615 struct drm_i915_private *dev_priv = dev->dev_private;
2616 struct ilk_wm_values *hw = &dev_priv->wm.hw;
2617 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2618 struct intel_pipe_wm *active = &intel_crtc->wm.active;
2619 enum pipe pipe = intel_crtc->pipe;
2620 static const unsigned int wm0_pipe_reg[] = {
2621 [PIPE_A] = WM0_PIPEA_ILK,
2622 [PIPE_B] = WM0_PIPEB_ILK,
2623 [PIPE_C] = WM0_PIPEC_IVB,
2626 hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]);
2627 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2628 hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
2630 if (intel_crtc_active(crtc)) {
2631 u32 tmp = hw->wm_pipe[pipe];
2634 * For active pipes LP0 watermark is marked as
2635 * enabled, and LP1+ watermaks as disabled since
2636 * we can't really reverse compute them in case
2637 * multiple pipes are active.
2639 active->wm[0].enable = true;
2640 active->wm[0].pri_val = (tmp & WM0_PIPE_PLANE_MASK) >> WM0_PIPE_PLANE_SHIFT;
2641 active->wm[0].spr_val = (tmp & WM0_PIPE_SPRITE_MASK) >> WM0_PIPE_SPRITE_SHIFT;
2642 active->wm[0].cur_val = tmp & WM0_PIPE_CURSOR_MASK;
2643 active->linetime = hw->wm_linetime[pipe];
2645 int level, max_level = ilk_wm_max_level(dev);
2648 * For inactive pipes, all watermark levels
2649 * should be marked as enabled but zeroed,
2650 * which is what we'd compute them to.
2652 for (level = 0; level <= max_level; level++)
2653 active->wm[level].enable = true;
2657 void ilk_wm_get_hw_state(struct drm_device *dev)
2659 struct drm_i915_private *dev_priv = dev->dev_private;
2660 struct ilk_wm_values *hw = &dev_priv->wm.hw;
2661 struct drm_crtc *crtc;
2663 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
2664 ilk_pipe_wm_get_hw_state(crtc);
2666 hw->wm_lp[0] = I915_READ(WM1_LP_ILK);
2667 hw->wm_lp[1] = I915_READ(WM2_LP_ILK);
2668 hw->wm_lp[2] = I915_READ(WM3_LP_ILK);
2670 hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
2671 hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
2672 hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
2674 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2675 hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?
2676 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
2677 else if (IS_IVYBRIDGE(dev))
2678 hw->partitioning = (I915_READ(DISP_ARB_CTL2) & DISP_DATA_PARTITION_5_6) ?
2679 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
2682 !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS);
2686 * intel_update_watermarks - update FIFO watermark values based on current modes
2688 * Calculate watermark values for the various WM regs based on current mode
2689 * and plane configuration.
2691 * There are several cases to deal with here:
2692 * - normal (i.e. non-self-refresh)
2693 * - self-refresh (SR) mode
2694 * - lines are large relative to FIFO size (buffer can hold up to 2)
2695 * - lines are small relative to FIFO size (buffer can hold more than 2
2696 * lines), so need to account for TLB latency
2698 * The normal calculation is:
2699 * watermark = dotclock * bytes per pixel * latency
2700 * where latency is platform & configuration dependent (we assume pessimal
2703 * The SR calculation is:
2704 * watermark = (trunc(latency/line time)+1) * surface width *
2707 * line time = htotal / dotclock
2708 * surface width = hdisplay for normal plane and 64 for cursor
2709 * and latency is assumed to be high, as above.
2711 * The final value programmed to the register should always be rounded up,
2712 * and include an extra 2 entries to account for clock crossings.
2714 * We don't use the sprite, so we can ignore that. And on Crestline we have
2715 * to set the non-SR watermarks to 8.
2717 void intel_update_watermarks(struct drm_crtc *crtc)
2719 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
2721 if (dev_priv->display.update_wm)
2722 dev_priv->display.update_wm(crtc);
2725 void intel_update_sprite_watermarks(struct drm_plane *plane,
2726 struct drm_crtc *crtc,
2727 uint32_t sprite_width, int pixel_size,
2728 bool enabled, bool scaled)
2730 struct drm_i915_private *dev_priv = plane->dev->dev_private;
2732 if (dev_priv->display.update_sprite_wm)
2733 dev_priv->display.update_sprite_wm(plane, crtc, sprite_width,
2734 pixel_size, enabled, scaled);
2737 static struct drm_i915_gem_object *
2738 intel_alloc_context_page(struct drm_device *dev)
2740 struct drm_i915_gem_object *ctx;
2743 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
2745 ctx = i915_gem_alloc_object(dev, 4096);
2747 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
2751 ret = i915_gem_obj_ggtt_pin(ctx, 4096, true, false);
2753 DRM_ERROR("failed to pin power context: %d\n", ret);
2757 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
2759 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
2766 i915_gem_object_unpin(ctx);
2768 drm_gem_object_unreference(&ctx->base);
2773 * Lock protecting IPS related data structures
2775 DEFINE_SPINLOCK(mchdev_lock);
2777 /* Global for IPS driver to get at the current i915 device. Protected by
2779 static struct drm_i915_private *i915_mch_dev;
2781 bool ironlake_set_drps(struct drm_device *dev, u8 val)
2783 struct drm_i915_private *dev_priv = dev->dev_private;
2786 assert_spin_locked(&mchdev_lock);
2788 rgvswctl = I915_READ16(MEMSWCTL);
2789 if (rgvswctl & MEMCTL_CMD_STS) {
2790 DRM_DEBUG("gpu busy, RCS change rejected\n");
2791 return false; /* still busy with another command */
2794 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
2795 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
2796 I915_WRITE16(MEMSWCTL, rgvswctl);
2797 POSTING_READ16(MEMSWCTL);
2799 rgvswctl |= MEMCTL_CMD_STS;
2800 I915_WRITE16(MEMSWCTL, rgvswctl);
2805 static void ironlake_enable_drps(struct drm_device *dev)
2807 struct drm_i915_private *dev_priv = dev->dev_private;
2808 u32 rgvmodectl = I915_READ(MEMMODECTL);
2809 u8 fmax, fmin, fstart, vstart;
2811 spin_lock_irq(&mchdev_lock);
2813 /* Enable temp reporting */
2814 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
2815 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
2817 /* 100ms RC evaluation intervals */
2818 I915_WRITE(RCUPEI, 100000);
2819 I915_WRITE(RCDNEI, 100000);
2821 /* Set max/min thresholds to 90ms and 80ms respectively */
2822 I915_WRITE(RCBMAXAVG, 90000);
2823 I915_WRITE(RCBMINAVG, 80000);
2825 I915_WRITE(MEMIHYST, 1);
2827 /* Set up min, max, and cur for interrupt handling */
2828 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
2829 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
2830 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
2831 MEMMODE_FSTART_SHIFT;
2833 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
2836 dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
2837 dev_priv->ips.fstart = fstart;
2839 dev_priv->ips.max_delay = fstart;
2840 dev_priv->ips.min_delay = fmin;
2841 dev_priv->ips.cur_delay = fstart;
2843 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
2844 fmax, fmin, fstart);
2846 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
2849 * Interrupts will be enabled in ironlake_irq_postinstall
2852 I915_WRITE(VIDSTART, vstart);
2853 POSTING_READ(VIDSTART);
2855 rgvmodectl |= MEMMODE_SWMODE_EN;
2856 I915_WRITE(MEMMODECTL, rgvmodectl);
2858 if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
2859 DRM_ERROR("stuck trying to change perf mode\n");
2862 ironlake_set_drps(dev, fstart);
2864 dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
2866 dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
2867 dev_priv->ips.last_count2 = I915_READ(0x112f4);
2868 getrawmonotonic(&dev_priv->ips.last_time2);
2870 spin_unlock_irq(&mchdev_lock);
2873 static void ironlake_disable_drps(struct drm_device *dev)
2875 struct drm_i915_private *dev_priv = dev->dev_private;
2878 spin_lock_irq(&mchdev_lock);
2880 rgvswctl = I915_READ16(MEMSWCTL);
2882 /* Ack interrupts, disable EFC interrupt */
2883 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
2884 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
2885 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
2886 I915_WRITE(DEIIR, DE_PCU_EVENT);
2887 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
2889 /* Go back to the starting frequency */
2890 ironlake_set_drps(dev, dev_priv->ips.fstart);
2892 rgvswctl |= MEMCTL_CMD_STS;
2893 I915_WRITE(MEMSWCTL, rgvswctl);
2896 spin_unlock_irq(&mchdev_lock);
2899 /* There's a funny hw issue where the hw returns all 0 when reading from
2900 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
2901 * ourselves, instead of doing a rmw cycle (which might result in us clearing
2902 * all limits and the gpu stuck at whatever frequency it is at atm).
2904 static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 val)
2908 /* Only set the down limit when we've reached the lowest level to avoid
2909 * getting more interrupts, otherwise leave this clear. This prevents a
2910 * race in the hw when coming out of rc6: There's a tiny window where
2911 * the hw runs at the minimal clock before selecting the desired
2912 * frequency, if the down threshold expires in that window we will not
2913 * receive a down interrupt. */
2914 limits = dev_priv->rps.max_delay << 24;
2915 if (val <= dev_priv->rps.min_delay)
2916 limits |= dev_priv->rps.min_delay << 16;
2921 static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
2925 new_power = dev_priv->rps.power;
2926 switch (dev_priv->rps.power) {
2928 if (val > dev_priv->rps.rpe_delay + 1 && val > dev_priv->rps.cur_delay)
2929 new_power = BETWEEN;
2933 if (val <= dev_priv->rps.rpe_delay && val < dev_priv->rps.cur_delay)
2934 new_power = LOW_POWER;
2935 else if (val >= dev_priv->rps.rp0_delay && val > dev_priv->rps.cur_delay)
2936 new_power = HIGH_POWER;
2940 if (val < (dev_priv->rps.rp1_delay + dev_priv->rps.rp0_delay) >> 1 && val < dev_priv->rps.cur_delay)
2941 new_power = BETWEEN;
2944 /* Max/min bins are special */
2945 if (val == dev_priv->rps.min_delay)
2946 new_power = LOW_POWER;
2947 if (val == dev_priv->rps.max_delay)
2948 new_power = HIGH_POWER;
2949 if (new_power == dev_priv->rps.power)
2952 /* Note the units here are not exactly 1us, but 1280ns. */
2953 switch (new_power) {
2955 /* Upclock if more than 95% busy over 16ms */
2956 I915_WRITE(GEN6_RP_UP_EI, 12500);
2957 I915_WRITE(GEN6_RP_UP_THRESHOLD, 11800);
2959 /* Downclock if less than 85% busy over 32ms */
2960 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
2961 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 21250);
2963 I915_WRITE(GEN6_RP_CONTROL,
2964 GEN6_RP_MEDIA_TURBO |
2965 GEN6_RP_MEDIA_HW_NORMAL_MODE |
2966 GEN6_RP_MEDIA_IS_GFX |
2968 GEN6_RP_UP_BUSY_AVG |
2969 GEN6_RP_DOWN_IDLE_AVG);
2973 /* Upclock if more than 90% busy over 13ms */
2974 I915_WRITE(GEN6_RP_UP_EI, 10250);
2975 I915_WRITE(GEN6_RP_UP_THRESHOLD, 9225);
2977 /* Downclock if less than 75% busy over 32ms */
2978 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
2979 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 18750);
2981 I915_WRITE(GEN6_RP_CONTROL,
2982 GEN6_RP_MEDIA_TURBO |
2983 GEN6_RP_MEDIA_HW_NORMAL_MODE |
2984 GEN6_RP_MEDIA_IS_GFX |
2986 GEN6_RP_UP_BUSY_AVG |
2987 GEN6_RP_DOWN_IDLE_AVG);
2991 /* Upclock if more than 85% busy over 10ms */
2992 I915_WRITE(GEN6_RP_UP_EI, 8000);
2993 I915_WRITE(GEN6_RP_UP_THRESHOLD, 6800);
2995 /* Downclock if less than 60% busy over 32ms */
2996 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
2997 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 15000);
2999 I915_WRITE(GEN6_RP_CONTROL,
3000 GEN6_RP_MEDIA_TURBO |
3001 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3002 GEN6_RP_MEDIA_IS_GFX |
3004 GEN6_RP_UP_BUSY_AVG |
3005 GEN6_RP_DOWN_IDLE_AVG);
3009 dev_priv->rps.power = new_power;
3010 dev_priv->rps.last_adj = 0;
3013 void gen6_set_rps(struct drm_device *dev, u8 val)
3015 struct drm_i915_private *dev_priv = dev->dev_private;
3017 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3018 WARN_ON(val > dev_priv->rps.max_delay);
3019 WARN_ON(val < dev_priv->rps.min_delay);
3021 if (val == dev_priv->rps.cur_delay)
3024 gen6_set_rps_thresholds(dev_priv, val);
3026 if (IS_HASWELL(dev))
3027 I915_WRITE(GEN6_RPNSWREQ,
3028 HSW_FREQUENCY(val));
3030 I915_WRITE(GEN6_RPNSWREQ,
3031 GEN6_FREQUENCY(val) |
3033 GEN6_AGGRESSIVE_TURBO);
3035 /* Make sure we continue to get interrupts
3036 * until we hit the minimum or maximum frequencies.
3038 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3039 gen6_rps_limits(dev_priv, val));
3041 POSTING_READ(GEN6_RPNSWREQ);
3043 dev_priv->rps.cur_delay = val;
3045 trace_intel_gpu_freq_change(val * 50);
3048 void gen6_rps_idle(struct drm_i915_private *dev_priv)
3050 struct drm_device *dev = dev_priv->dev;
3052 mutex_lock(&dev_priv->rps.hw_lock);
3053 if (dev_priv->rps.enabled) {
3054 if (IS_VALLEYVIEW(dev))
3055 valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3057 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3058 dev_priv->rps.last_adj = 0;
3060 mutex_unlock(&dev_priv->rps.hw_lock);
3063 void gen6_rps_boost(struct drm_i915_private *dev_priv)
3065 struct drm_device *dev = dev_priv->dev;
3067 mutex_lock(&dev_priv->rps.hw_lock);
3068 if (dev_priv->rps.enabled) {
3069 if (IS_VALLEYVIEW(dev))
3070 valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
3072 gen6_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
3073 dev_priv->rps.last_adj = 0;
3075 mutex_unlock(&dev_priv->rps.hw_lock);
3078 void valleyview_set_rps(struct drm_device *dev, u8 val)
3080 struct drm_i915_private *dev_priv = dev->dev_private;
3082 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3083 WARN_ON(val > dev_priv->rps.max_delay);
3084 WARN_ON(val < dev_priv->rps.min_delay);
3086 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3087 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay),
3088 dev_priv->rps.cur_delay,
3089 vlv_gpu_freq(dev_priv, val), val);
3091 if (val == dev_priv->rps.cur_delay)
3094 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
3096 dev_priv->rps.cur_delay = val;
3098 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv, val));
3101 static void gen6_disable_rps_interrupts(struct drm_device *dev)
3103 struct drm_i915_private *dev_priv = dev->dev_private;
3105 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3106 I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS);
3107 /* Complete PM interrupt masking here doesn't race with the rps work
3108 * item again unmasking PM interrupts because that is using a different
3109 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3110 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3112 spin_lock_irq(&dev_priv->irq_lock);
3113 dev_priv->rps.pm_iir = 0;
3114 spin_unlock_irq(&dev_priv->irq_lock);
3116 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3119 static void gen6_disable_rps(struct drm_device *dev)
3121 struct drm_i915_private *dev_priv = dev->dev_private;
3123 I915_WRITE(GEN6_RC_CONTROL, 0);
3124 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
3126 gen6_disable_rps_interrupts(dev);
3129 static void valleyview_disable_rps(struct drm_device *dev)
3131 struct drm_i915_private *dev_priv = dev->dev_private;
3133 I915_WRITE(GEN6_RC_CONTROL, 0);
3135 gen6_disable_rps_interrupts(dev);
3137 if (dev_priv->vlv_pctx) {
3138 drm_gem_object_unreference(&dev_priv->vlv_pctx->base);
3139 dev_priv->vlv_pctx = NULL;
3143 static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
3146 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3148 if (IS_HASWELL(dev))
3149 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3151 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3152 (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off",
3153 (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off",
3154 (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off");
3157 int intel_enable_rc6(const struct drm_device *dev)
3159 /* No RC6 before Ironlake */
3160 if (INTEL_INFO(dev)->gen < 5)
3163 /* Respect the kernel parameter if it is set */
3164 if (i915_enable_rc6 >= 0)
3165 return i915_enable_rc6;
3167 /* Disable RC6 on Ironlake */
3168 if (INTEL_INFO(dev)->gen == 5)
3171 if (IS_HASWELL(dev))
3172 return INTEL_RC6_ENABLE;
3174 /* snb/ivb have more than one rc6 state. */
3175 if (INTEL_INFO(dev)->gen == 6)
3176 return INTEL_RC6_ENABLE;
3178 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
3181 static void gen6_enable_rps_interrupts(struct drm_device *dev)
3183 struct drm_i915_private *dev_priv = dev->dev_private;
3186 spin_lock_irq(&dev_priv->irq_lock);
3187 WARN_ON(dev_priv->rps.pm_iir);
3188 snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
3189 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3190 spin_unlock_irq(&dev_priv->irq_lock);
3192 /* only unmask PM interrupts we need. Mask all others. */
3193 enabled_intrs = GEN6_PM_RPS_EVENTS;
3195 /* IVB and SNB hard hangs on looping batchbuffer
3196 * if GEN6_PM_UP_EI_EXPIRED is masked.
3198 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
3199 enabled_intrs |= GEN6_PM_RP_UP_EI_EXPIRED;
3201 I915_WRITE(GEN6_PMINTRMSK, ~enabled_intrs);
3204 static void gen8_enable_rps(struct drm_device *dev)
3206 struct drm_i915_private *dev_priv = dev->dev_private;
3207 struct intel_ring_buffer *ring;
3208 uint32_t rc6_mask = 0, rp_state_cap;
3211 /* 1a: Software RC state - RC0 */
3212 I915_WRITE(GEN6_RC_STATE, 0);
3214 /* 1c & 1d: Get forcewake during program sequence. Although the driver
3215 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
3216 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3218 /* 2a: Disable RC states. */
3219 I915_WRITE(GEN6_RC_CONTROL, 0);
3221 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3223 /* 2b: Program RC6 thresholds.*/
3224 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
3225 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
3226 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
3227 for_each_ring(ring, dev_priv, unused)
3228 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3229 I915_WRITE(GEN6_RC_SLEEP, 0);
3230 I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */
3233 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
3234 rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
3235 DRM_INFO("RC6 %s\n", (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off");
3236 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
3237 GEN6_RC_CTL_EI_MODE(1) |
3240 /* 4 Program defaults and thresholds for RPS*/
3241 I915_WRITE(GEN6_RPNSWREQ, HSW_FREQUENCY(10)); /* Request 500 MHz */
3242 I915_WRITE(GEN6_RC_VIDEO_FREQ, HSW_FREQUENCY(12)); /* Request 600 MHz */
3243 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
3244 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
3246 /* Docs recommend 900MHz, and 300 MHz respectively */
3247 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3248 dev_priv->rps.max_delay << 24 |
3249 dev_priv->rps.min_delay << 16);
3251 I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
3252 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
3253 I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
3254 I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
3256 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3259 I915_WRITE(GEN6_RP_CONTROL,
3260 GEN6_RP_MEDIA_TURBO |
3261 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3262 GEN6_RP_MEDIA_IS_GFX |
3264 GEN6_RP_UP_BUSY_AVG |
3265 GEN6_RP_DOWN_IDLE_AVG);
3267 /* 6: Ring frequency + overclocking (our driver does this later */
3269 gen6_set_rps(dev, (I915_READ(GEN6_GT_PERF_STATUS) & 0xff00) >> 8);
3271 gen6_enable_rps_interrupts(dev);
3273 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3276 static void gen6_enable_rps(struct drm_device *dev)
3278 struct drm_i915_private *dev_priv = dev->dev_private;
3279 struct intel_ring_buffer *ring;
3282 u32 rc6vids, pcu_mbox, rc6_mask = 0;
3287 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3289 /* Here begins a magic sequence of register writes to enable
3290 * auto-downclocking.
3292 * Perhaps there might be some value in exposing these to
3295 I915_WRITE(GEN6_RC_STATE, 0);
3297 /* Clear the DBG now so we don't confuse earlier errors */
3298 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3299 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
3300 I915_WRITE(GTFIFODBG, gtfifodbg);
3303 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3305 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3306 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
3308 /* In units of 50MHz */
3309 dev_priv->rps.hw_max = dev_priv->rps.max_delay = rp_state_cap & 0xff;
3310 dev_priv->rps.min_delay = (rp_state_cap >> 16) & 0xff;
3311 dev_priv->rps.rp1_delay = (rp_state_cap >> 8) & 0xff;
3312 dev_priv->rps.rp0_delay = (rp_state_cap >> 0) & 0xff;
3313 dev_priv->rps.rpe_delay = dev_priv->rps.rp1_delay;
3314 dev_priv->rps.cur_delay = 0;
3316 /* disable the counters and set deterministic thresholds */
3317 I915_WRITE(GEN6_RC_CONTROL, 0);
3319 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
3320 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
3321 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
3322 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3323 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3325 for_each_ring(ring, dev_priv, i)
3326 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3328 I915_WRITE(GEN6_RC_SLEEP, 0);
3329 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
3330 if (IS_IVYBRIDGE(dev))
3331 I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
3333 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
3334 I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
3335 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
3337 /* Check if we are enabling RC6 */
3338 rc6_mode = intel_enable_rc6(dev_priv->dev);
3339 if (rc6_mode & INTEL_RC6_ENABLE)
3340 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
3342 /* We don't use those on Haswell */
3343 if (!IS_HASWELL(dev)) {
3344 if (rc6_mode & INTEL_RC6p_ENABLE)
3345 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
3347 if (rc6_mode & INTEL_RC6pp_ENABLE)
3348 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
3351 intel_print_rc6_info(dev, rc6_mask);
3353 I915_WRITE(GEN6_RC_CONTROL,
3355 GEN6_RC_CTL_EI_MODE(1) |
3356 GEN6_RC_CTL_HW_ENABLE);
3358 /* Power down if completely idle for over 50ms */
3359 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
3360 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3362 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
3365 ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
3366 if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
3367 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3368 (dev_priv->rps.max_delay & 0xff) * 50,
3369 (pcu_mbox & 0xff) * 50);
3370 dev_priv->rps.hw_max = pcu_mbox & 0xff;
3373 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3376 dev_priv->rps.power = HIGH_POWER; /* force a reset */
3377 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3379 gen6_enable_rps_interrupts(dev);
3382 ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
3383 if (IS_GEN6(dev) && ret) {
3384 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3385 } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
3386 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3387 GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
3388 rc6vids &= 0xffff00;
3389 rc6vids |= GEN6_ENCODE_RC6_VID(450);
3390 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
3392 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3395 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3398 void gen6_update_ring_freq(struct drm_device *dev)
3400 struct drm_i915_private *dev_priv = dev->dev_private;
3402 unsigned int gpu_freq;
3403 unsigned int max_ia_freq, min_ring_freq;
3404 int scaling_factor = 180;
3405 struct cpufreq_policy *policy;
3407 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3409 policy = cpufreq_cpu_get(0);
3411 max_ia_freq = policy->cpuinfo.max_freq;
3412 cpufreq_cpu_put(policy);
3415 * Default to measured freq if none found, PCU will ensure we
3418 max_ia_freq = tsc_khz;
3421 /* Convert from kHz to MHz */
3422 max_ia_freq /= 1000;
3424 min_ring_freq = I915_READ(DCLK) & 0xf;
3425 /* convert DDR frequency from units of 266.6MHz to bandwidth */
3426 min_ring_freq = mult_frac(min_ring_freq, 8, 3);
3429 * For each potential GPU frequency, load a ring frequency we'd like
3430 * to use for memory access. We do this by specifying the IA frequency
3431 * the PCU should use as a reference to determine the ring frequency.
3433 for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay;
3435 int diff = dev_priv->rps.max_delay - gpu_freq;
3436 unsigned int ia_freq = 0, ring_freq = 0;
3438 if (INTEL_INFO(dev)->gen >= 8) {
3439 /* max(2 * GT, DDR). NB: GT is 50MHz units */
3440 ring_freq = max(min_ring_freq, gpu_freq);
3441 } else if (IS_HASWELL(dev)) {
3442 ring_freq = mult_frac(gpu_freq, 5, 4);
3443 ring_freq = max(min_ring_freq, ring_freq);
3444 /* leave ia_freq as the default, chosen by cpufreq */
3446 /* On older processors, there is no separate ring
3447 * clock domain, so in order to boost the bandwidth
3448 * of the ring, we need to upclock the CPU (ia_freq).
3450 * For GPU frequencies less than 750MHz,
3451 * just use the lowest ring freq.
3453 if (gpu_freq < min_freq)
3456 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
3457 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
3460 sandybridge_pcode_write(dev_priv,
3461 GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
3462 ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
3463 ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
3468 int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
3472 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
3474 rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
3476 rp0 = min_t(u32, rp0, 0xea);
3481 static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
3485 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
3486 rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
3487 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
3488 rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
3493 int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
3495 return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
3498 static void valleyview_setup_pctx(struct drm_device *dev)
3500 struct drm_i915_private *dev_priv = dev->dev_private;
3501 struct drm_i915_gem_object *pctx;
3502 unsigned long pctx_paddr;
3504 int pctx_size = 24*1024;
3506 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
3508 pcbr = I915_READ(VLV_PCBR);
3510 /* BIOS set it up already, grab the pre-alloc'd space */
3513 pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
3514 pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev,
3516 I915_GTT_OFFSET_NONE,
3522 * From the Gunit register HAS:
3523 * The Gfx driver is expected to program this register and ensure
3524 * proper allocation within Gfx stolen memory. For example, this
3525 * register should be programmed such than the PCBR range does not
3526 * overlap with other ranges, such as the frame buffer, protected
3527 * memory, or any other relevant ranges.
3529 pctx = i915_gem_object_create_stolen(dev, pctx_size);
3531 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
3535 pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
3536 I915_WRITE(VLV_PCBR, pctx_paddr);
3539 dev_priv->vlv_pctx = pctx;
3542 static void valleyview_enable_rps(struct drm_device *dev)
3544 struct drm_i915_private *dev_priv = dev->dev_private;
3545 struct intel_ring_buffer *ring;
3546 u32 gtfifodbg, val, rc6_mode = 0;
3549 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3551 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3552 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
3554 I915_WRITE(GTFIFODBG, gtfifodbg);
3557 /* If VLV, Forcewake all wells, else re-direct to regular path */
3558 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3560 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
3561 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
3562 I915_WRITE(GEN6_RP_UP_EI, 66000);
3563 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
3565 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3567 I915_WRITE(GEN6_RP_CONTROL,
3568 GEN6_RP_MEDIA_TURBO |
3569 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3570 GEN6_RP_MEDIA_IS_GFX |
3572 GEN6_RP_UP_BUSY_AVG |
3573 GEN6_RP_DOWN_IDLE_CONT);
3575 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
3576 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3577 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3579 for_each_ring(ring, dev_priv, i)
3580 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3582 I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
3584 /* allows RC6 residency counter to work */
3585 I915_WRITE(VLV_COUNTER_CONTROL,
3586 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
3587 VLV_MEDIA_RC6_COUNT_EN |
3588 VLV_RENDER_RC6_COUNT_EN));
3589 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
3590 rc6_mode = GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL;
3592 intel_print_rc6_info(dev, rc6_mode);
3594 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
3596 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
3598 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
3599 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
3601 dev_priv->rps.cur_delay = (val >> 8) & 0xff;
3602 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
3603 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay),
3604 dev_priv->rps.cur_delay);
3606 dev_priv->rps.max_delay = valleyview_rps_max_freq(dev_priv);
3607 dev_priv->rps.hw_max = dev_priv->rps.max_delay;
3608 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
3609 vlv_gpu_freq(dev_priv, dev_priv->rps.max_delay),
3610 dev_priv->rps.max_delay);
3612 dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv);
3613 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
3614 vlv_gpu_freq(dev_priv, dev_priv->rps.rpe_delay),
3615 dev_priv->rps.rpe_delay);
3617 dev_priv->rps.min_delay = valleyview_rps_min_freq(dev_priv);
3618 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
3619 vlv_gpu_freq(dev_priv, dev_priv->rps.min_delay),
3620 dev_priv->rps.min_delay);
3622 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
3623 vlv_gpu_freq(dev_priv, dev_priv->rps.rpe_delay),
3624 dev_priv->rps.rpe_delay);
3626 valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
3628 gen6_enable_rps_interrupts(dev);
3630 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3633 void ironlake_teardown_rc6(struct drm_device *dev)
3635 struct drm_i915_private *dev_priv = dev->dev_private;
3637 if (dev_priv->ips.renderctx) {
3638 i915_gem_object_unpin(dev_priv->ips.renderctx);
3639 drm_gem_object_unreference(&dev_priv->ips.renderctx->base);
3640 dev_priv->ips.renderctx = NULL;
3643 if (dev_priv->ips.pwrctx) {
3644 i915_gem_object_unpin(dev_priv->ips.pwrctx);
3645 drm_gem_object_unreference(&dev_priv->ips.pwrctx->base);
3646 dev_priv->ips.pwrctx = NULL;
3650 static void ironlake_disable_rc6(struct drm_device *dev)
3652 struct drm_i915_private *dev_priv = dev->dev_private;
3654 if (I915_READ(PWRCTXA)) {
3655 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
3656 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
3657 wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
3660 I915_WRITE(PWRCTXA, 0);
3661 POSTING_READ(PWRCTXA);
3663 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3664 POSTING_READ(RSTDBYCTL);
3668 static int ironlake_setup_rc6(struct drm_device *dev)
3670 struct drm_i915_private *dev_priv = dev->dev_private;
3672 if (dev_priv->ips.renderctx == NULL)
3673 dev_priv->ips.renderctx = intel_alloc_context_page(dev);
3674 if (!dev_priv->ips.renderctx)
3677 if (dev_priv->ips.pwrctx == NULL)
3678 dev_priv->ips.pwrctx = intel_alloc_context_page(dev);
3679 if (!dev_priv->ips.pwrctx) {
3680 ironlake_teardown_rc6(dev);
3687 static void ironlake_enable_rc6(struct drm_device *dev)
3689 struct drm_i915_private *dev_priv = dev->dev_private;
3690 struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
3691 bool was_interruptible;
3694 /* rc6 disabled by default due to repeated reports of hanging during
3697 if (!intel_enable_rc6(dev))
3700 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
3702 ret = ironlake_setup_rc6(dev);
3706 was_interruptible = dev_priv->mm.interruptible;
3707 dev_priv->mm.interruptible = false;
3710 * GPU can automatically power down the render unit if given a page
3713 ret = intel_ring_begin(ring, 6);
3715 ironlake_teardown_rc6(dev);
3716 dev_priv->mm.interruptible = was_interruptible;
3720 intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
3721 intel_ring_emit(ring, MI_SET_CONTEXT);
3722 intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx) |
3724 MI_SAVE_EXT_STATE_EN |
3725 MI_RESTORE_EXT_STATE_EN |
3726 MI_RESTORE_INHIBIT);
3727 intel_ring_emit(ring, MI_SUSPEND_FLUSH);
3728 intel_ring_emit(ring, MI_NOOP);
3729 intel_ring_emit(ring, MI_FLUSH);
3730 intel_ring_advance(ring);
3733 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
3734 * does an implicit flush, combined with MI_FLUSH above, it should be
3735 * safe to assume that renderctx is valid
3737 ret = intel_ring_idle(ring);
3738 dev_priv->mm.interruptible = was_interruptible;
3740 DRM_ERROR("failed to enable ironlake power savings\n");
3741 ironlake_teardown_rc6(dev);
3745 I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN);
3746 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3748 intel_print_rc6_info(dev, INTEL_RC6_ENABLE);
3751 static unsigned long intel_pxfreq(u32 vidfreq)
3754 int div = (vidfreq & 0x3f0000) >> 16;
3755 int post = (vidfreq & 0x3000) >> 12;
3756 int pre = (vidfreq & 0x7);
3761 freq = ((div * 133333) / ((1<<post) * pre));
3766 static const struct cparams {
3772 { 1, 1333, 301, 28664 },
3773 { 1, 1066, 294, 24460 },
3774 { 1, 800, 294, 25192 },
3775 { 0, 1333, 276, 27605 },
3776 { 0, 1066, 276, 27605 },
3777 { 0, 800, 231, 23784 },
3780 static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
3782 u64 total_count, diff, ret;
3783 u32 count1, count2, count3, m = 0, c = 0;
3784 unsigned long now = jiffies_to_msecs(jiffies), diff1;
3787 assert_spin_locked(&mchdev_lock);
3789 diff1 = now - dev_priv->ips.last_time1;
3791 /* Prevent division-by-zero if we are asking too fast.
3792 * Also, we don't get interesting results if we are polling
3793 * faster than once in 10ms, so just return the saved value
3797 return dev_priv->ips.chipset_power;
3799 count1 = I915_READ(DMIEC);
3800 count2 = I915_READ(DDREC);
3801 count3 = I915_READ(CSIEC);
3803 total_count = count1 + count2 + count3;
3805 /* FIXME: handle per-counter overflow */
3806 if (total_count < dev_priv->ips.last_count1) {
3807 diff = ~0UL - dev_priv->ips.last_count1;
3808 diff += total_count;
3810 diff = total_count - dev_priv->ips.last_count1;
3813 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
3814 if (cparams[i].i == dev_priv->ips.c_m &&
3815 cparams[i].t == dev_priv->ips.r_t) {
3822 diff = div_u64(diff, diff1);
3823 ret = ((m * diff) + c);
3824 ret = div_u64(ret, 10);
3826 dev_priv->ips.last_count1 = total_count;
3827 dev_priv->ips.last_time1 = now;
3829 dev_priv->ips.chipset_power = ret;
3834 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
3838 if (dev_priv->info->gen != 5)
3841 spin_lock_irq(&mchdev_lock);
3843 val = __i915_chipset_val(dev_priv);
3845 spin_unlock_irq(&mchdev_lock);
3850 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
3852 unsigned long m, x, b;
3855 tsfs = I915_READ(TSFS);
3857 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
3858 x = I915_READ8(TR1);
3860 b = tsfs & TSFS_INTR_MASK;
3862 return ((m * x) / 127) - b;
3865 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
3867 static const struct v_table {
3868 u16 vd; /* in .1 mil */
3869 u16 vm; /* in .1 mil */
4000 if (dev_priv->info->is_mobile)
4001 return v_table[pxvid].vm;
4003 return v_table[pxvid].vd;
4006 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
4008 struct timespec now, diff1;
4010 unsigned long diffms;
4013 assert_spin_locked(&mchdev_lock);
4015 getrawmonotonic(&now);
4016 diff1 = timespec_sub(now, dev_priv->ips.last_time2);
4018 /* Don't divide by 0 */
4019 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
4023 count = I915_READ(GFXEC);
4025 if (count < dev_priv->ips.last_count2) {
4026 diff = ~0UL - dev_priv->ips.last_count2;
4029 diff = count - dev_priv->ips.last_count2;
4032 dev_priv->ips.last_count2 = count;
4033 dev_priv->ips.last_time2 = now;
4035 /* More magic constants... */
4037 diff = div_u64(diff, diffms * 10);
4038 dev_priv->ips.gfx_power = diff;
4041 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
4043 if (dev_priv->info->gen != 5)
4046 spin_lock_irq(&mchdev_lock);
4048 __i915_update_gfx_val(dev_priv);
4050 spin_unlock_irq(&mchdev_lock);
4053 static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
4055 unsigned long t, corr, state1, corr2, state2;
4058 assert_spin_locked(&mchdev_lock);
4060 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4));
4061 pxvid = (pxvid >> 24) & 0x7f;
4062 ext_v = pvid_to_extvid(dev_priv, pxvid);
4066 t = i915_mch_val(dev_priv);
4068 /* Revel in the empirically derived constants */
4070 /* Correction factor in 1/100000 units */
4072 corr = ((t * 2349) + 135940);
4074 corr = ((t * 964) + 29317);
4076 corr = ((t * 301) + 1004);
4078 corr = corr * ((150142 * state1) / 10000 - 78642);
4080 corr2 = (corr * dev_priv->ips.corr);
4082 state2 = (corr2 * state1) / 10000;
4083 state2 /= 100; /* convert to mW */
4085 __i915_update_gfx_val(dev_priv);
4087 return dev_priv->ips.gfx_power + state2;
4090 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
4094 if (dev_priv->info->gen != 5)
4097 spin_lock_irq(&mchdev_lock);
4099 val = __i915_gfx_val(dev_priv);
4101 spin_unlock_irq(&mchdev_lock);
4107 * i915_read_mch_val - return value for IPS use
4109 * Calculate and return a value for the IPS driver to use when deciding whether
4110 * we have thermal and power headroom to increase CPU or GPU power budget.
4112 unsigned long i915_read_mch_val(void)
4114 struct drm_i915_private *dev_priv;
4115 unsigned long chipset_val, graphics_val, ret = 0;
4117 spin_lock_irq(&mchdev_lock);
4120 dev_priv = i915_mch_dev;
4122 chipset_val = __i915_chipset_val(dev_priv);
4123 graphics_val = __i915_gfx_val(dev_priv);
4125 ret = chipset_val + graphics_val;
4128 spin_unlock_irq(&mchdev_lock);
4132 EXPORT_SYMBOL_GPL(i915_read_mch_val);
4135 * i915_gpu_raise - raise GPU frequency limit
4137 * Raise the limit; IPS indicates we have thermal headroom.
4139 bool i915_gpu_raise(void)
4141 struct drm_i915_private *dev_priv;
4144 spin_lock_irq(&mchdev_lock);
4145 if (!i915_mch_dev) {
4149 dev_priv = i915_mch_dev;
4151 if (dev_priv->ips.max_delay > dev_priv->ips.fmax)
4152 dev_priv->ips.max_delay--;
4155 spin_unlock_irq(&mchdev_lock);
4159 EXPORT_SYMBOL_GPL(i915_gpu_raise);
4162 * i915_gpu_lower - lower GPU frequency limit
4164 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4165 * frequency maximum.
4167 bool i915_gpu_lower(void)
4169 struct drm_i915_private *dev_priv;
4172 spin_lock_irq(&mchdev_lock);
4173 if (!i915_mch_dev) {
4177 dev_priv = i915_mch_dev;
4179 if (dev_priv->ips.max_delay < dev_priv->ips.min_delay)
4180 dev_priv->ips.max_delay++;
4183 spin_unlock_irq(&mchdev_lock);
4187 EXPORT_SYMBOL_GPL(i915_gpu_lower);
4190 * i915_gpu_busy - indicate GPU business to IPS
4192 * Tell the IPS driver whether or not the GPU is busy.
4194 bool i915_gpu_busy(void)
4196 struct drm_i915_private *dev_priv;
4197 struct intel_ring_buffer *ring;
4201 spin_lock_irq(&mchdev_lock);
4204 dev_priv = i915_mch_dev;
4206 for_each_ring(ring, dev_priv, i)
4207 ret |= !list_empty(&ring->request_list);
4210 spin_unlock_irq(&mchdev_lock);
4214 EXPORT_SYMBOL_GPL(i915_gpu_busy);
4217 * i915_gpu_turbo_disable - disable graphics turbo
4219 * Disable graphics turbo by resetting the max frequency and setting the
4220 * current frequency to the default.
4222 bool i915_gpu_turbo_disable(void)
4224 struct drm_i915_private *dev_priv;
4227 spin_lock_irq(&mchdev_lock);
4228 if (!i915_mch_dev) {
4232 dev_priv = i915_mch_dev;
4234 dev_priv->ips.max_delay = dev_priv->ips.fstart;
4236 if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart))
4240 spin_unlock_irq(&mchdev_lock);
4244 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
4247 * Tells the intel_ips driver that the i915 driver is now loaded, if
4248 * IPS got loaded first.
4250 * This awkward dance is so that neither module has to depend on the
4251 * other in order for IPS to do the appropriate communication of
4252 * GPU turbo limits to i915.
4255 ips_ping_for_i915_load(void)
4259 link = symbol_get(ips_link_to_i915_driver);
4262 symbol_put(ips_link_to_i915_driver);
4266 void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
4268 /* We only register the i915 ips part with intel-ips once everything is
4269 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4270 spin_lock_irq(&mchdev_lock);
4271 i915_mch_dev = dev_priv;
4272 spin_unlock_irq(&mchdev_lock);
4274 ips_ping_for_i915_load();
4277 void intel_gpu_ips_teardown(void)
4279 spin_lock_irq(&mchdev_lock);
4280 i915_mch_dev = NULL;
4281 spin_unlock_irq(&mchdev_lock);
4283 static void intel_init_emon(struct drm_device *dev)
4285 struct drm_i915_private *dev_priv = dev->dev_private;
4290 /* Disable to program */
4294 /* Program energy weights for various events */
4295 I915_WRITE(SDEW, 0x15040d00);
4296 I915_WRITE(CSIEW0, 0x007f0000);
4297 I915_WRITE(CSIEW1, 0x1e220004);
4298 I915_WRITE(CSIEW2, 0x04000004);
4300 for (i = 0; i < 5; i++)
4301 I915_WRITE(PEW + (i * 4), 0);
4302 for (i = 0; i < 3; i++)
4303 I915_WRITE(DEW + (i * 4), 0);
4305 /* Program P-state weights to account for frequency power adjustment */
4306 for (i = 0; i < 16; i++) {
4307 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
4308 unsigned long freq = intel_pxfreq(pxvidfreq);
4309 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
4314 val *= (freq / 1000);
4316 val /= (127*127*900);
4318 DRM_ERROR("bad pxval: %ld\n", val);
4321 /* Render standby states get 0 weight */
4325 for (i = 0; i < 4; i++) {
4326 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
4327 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
4328 I915_WRITE(PXW + (i * 4), val);
4331 /* Adjust magic regs to magic values (more experimental results) */
4332 I915_WRITE(OGW0, 0);
4333 I915_WRITE(OGW1, 0);
4334 I915_WRITE(EG0, 0x00007f00);
4335 I915_WRITE(EG1, 0x0000000e);
4336 I915_WRITE(EG2, 0x000e0000);
4337 I915_WRITE(EG3, 0x68000300);
4338 I915_WRITE(EG4, 0x42000000);
4339 I915_WRITE(EG5, 0x00140031);
4343 for (i = 0; i < 8; i++)
4344 I915_WRITE(PXWL + (i * 4), 0);
4346 /* Enable PMON + select events */
4347 I915_WRITE(ECR, 0x80000019);
4349 lcfuse = I915_READ(LCFUSE02);
4351 dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
4354 void intel_disable_gt_powersave(struct drm_device *dev)
4356 struct drm_i915_private *dev_priv = dev->dev_private;
4358 /* Interrupts should be disabled already to avoid re-arming. */
4359 WARN_ON(dev->irq_enabled);
4361 if (IS_IRONLAKE_M(dev)) {
4362 ironlake_disable_drps(dev);
4363 ironlake_disable_rc6(dev);
4364 } else if (INTEL_INFO(dev)->gen >= 6) {
4365 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
4366 cancel_work_sync(&dev_priv->rps.work);
4367 mutex_lock(&dev_priv->rps.hw_lock);
4368 if (IS_VALLEYVIEW(dev))
4369 valleyview_disable_rps(dev);
4371 gen6_disable_rps(dev);
4372 dev_priv->rps.enabled = false;
4373 mutex_unlock(&dev_priv->rps.hw_lock);
4377 static void intel_gen6_powersave_work(struct work_struct *work)
4379 struct drm_i915_private *dev_priv =
4380 container_of(work, struct drm_i915_private,
4381 rps.delayed_resume_work.work);
4382 struct drm_device *dev = dev_priv->dev;
4384 mutex_lock(&dev_priv->rps.hw_lock);
4386 if (IS_VALLEYVIEW(dev)) {
4387 valleyview_enable_rps(dev);
4388 } else if (IS_BROADWELL(dev)) {
4389 gen8_enable_rps(dev);
4390 gen6_update_ring_freq(dev);
4392 gen6_enable_rps(dev);
4393 gen6_update_ring_freq(dev);
4395 dev_priv->rps.enabled = true;
4396 mutex_unlock(&dev_priv->rps.hw_lock);
4399 void intel_enable_gt_powersave(struct drm_device *dev)
4401 struct drm_i915_private *dev_priv = dev->dev_private;
4403 if (IS_IRONLAKE_M(dev)) {
4404 ironlake_enable_drps(dev);
4405 ironlake_enable_rc6(dev);
4406 intel_init_emon(dev);
4407 } else if (IS_GEN6(dev) || IS_GEN7(dev)) {
4408 if (IS_VALLEYVIEW(dev))
4409 valleyview_setup_pctx(dev);
4411 * PCU communication is slow and this doesn't need to be
4412 * done at any specific time, so do this out of our fast path
4413 * to make resume and init faster.
4415 schedule_delayed_work(&dev_priv->rps.delayed_resume_work,
4416 round_jiffies_up_relative(HZ));
4420 static void ibx_init_clock_gating(struct drm_device *dev)
4422 struct drm_i915_private *dev_priv = dev->dev_private;
4425 * On Ibex Peak and Cougar Point, we need to disable clock
4426 * gating for the panel power sequencer or it will fail to
4427 * start up when no ports are active.
4429 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
4432 static void g4x_disable_trickle_feed(struct drm_device *dev)
4434 struct drm_i915_private *dev_priv = dev->dev_private;
4437 for_each_pipe(pipe) {
4438 I915_WRITE(DSPCNTR(pipe),
4439 I915_READ(DSPCNTR(pipe)) |
4440 DISPPLANE_TRICKLE_FEED_DISABLE);
4441 intel_flush_primary_plane(dev_priv, pipe);
4445 static void ilk_init_lp_watermarks(struct drm_device *dev)
4447 struct drm_i915_private *dev_priv = dev->dev_private;
4449 I915_WRITE(WM3_LP_ILK, I915_READ(WM3_LP_ILK) & ~WM1_LP_SR_EN);
4450 I915_WRITE(WM2_LP_ILK, I915_READ(WM2_LP_ILK) & ~WM1_LP_SR_EN);
4451 I915_WRITE(WM1_LP_ILK, I915_READ(WM1_LP_ILK) & ~WM1_LP_SR_EN);
4454 * Don't touch WM1S_LP_EN here.
4455 * Doing so could cause underruns.
4459 static void ironlake_init_clock_gating(struct drm_device *dev)
4461 struct drm_i915_private *dev_priv = dev->dev_private;
4462 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
4466 * WaFbcDisableDpfcClockGating:ilk
4468 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
4469 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
4470 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
4472 I915_WRITE(PCH_3DCGDIS0,
4473 MARIUNIT_CLOCK_GATE_DISABLE |
4474 SVSMUNIT_CLOCK_GATE_DISABLE);
4475 I915_WRITE(PCH_3DCGDIS1,
4476 VFMUNIT_CLOCK_GATE_DISABLE);
4479 * According to the spec the following bits should be set in
4480 * order to enable memory self-refresh
4481 * The bit 22/21 of 0x42004
4482 * The bit 5 of 0x42020
4483 * The bit 15 of 0x45000
4485 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4486 (I915_READ(ILK_DISPLAY_CHICKEN2) |
4487 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
4488 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
4489 I915_WRITE(DISP_ARB_CTL,
4490 (I915_READ(DISP_ARB_CTL) |
4493 ilk_init_lp_watermarks(dev);
4496 * Based on the document from hardware guys the following bits
4497 * should be set unconditionally in order to enable FBC.
4498 * The bit 22 of 0x42000
4499 * The bit 22 of 0x42004
4500 * The bit 7,8,9 of 0x42020.
4502 if (IS_IRONLAKE_M(dev)) {
4503 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
4504 I915_WRITE(ILK_DISPLAY_CHICKEN1,
4505 I915_READ(ILK_DISPLAY_CHICKEN1) |
4507 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4508 I915_READ(ILK_DISPLAY_CHICKEN2) |
4512 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
4514 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4515 I915_READ(ILK_DISPLAY_CHICKEN2) |
4516 ILK_ELPIN_409_SELECT);
4517 I915_WRITE(_3D_CHICKEN2,
4518 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
4519 _3D_CHICKEN2_WM_READ_PIPELINED);
4521 /* WaDisableRenderCachePipelinedFlush:ilk */
4522 I915_WRITE(CACHE_MODE_0,
4523 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
4525 g4x_disable_trickle_feed(dev);
4527 ibx_init_clock_gating(dev);
4530 static void cpt_init_clock_gating(struct drm_device *dev)
4532 struct drm_i915_private *dev_priv = dev->dev_private;
4537 * On Ibex Peak and Cougar Point, we need to disable clock
4538 * gating for the panel power sequencer or it will fail to
4539 * start up when no ports are active.
4541 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
4542 PCH_DPLUNIT_CLOCK_GATE_DISABLE |
4543 PCH_CPUNIT_CLOCK_GATE_DISABLE);
4544 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
4545 DPLS_EDP_PPS_FIX_DIS);
4546 /* The below fixes the weird display corruption, a few pixels shifted
4547 * downward, on (only) LVDS of some HP laptops with IVY.
4549 for_each_pipe(pipe) {
4550 val = I915_READ(TRANS_CHICKEN2(pipe));
4551 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
4552 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
4553 if (dev_priv->vbt.fdi_rx_polarity_inverted)
4554 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
4555 val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
4556 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
4557 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
4558 I915_WRITE(TRANS_CHICKEN2(pipe), val);
4560 /* WADP0ClockGatingDisable */
4561 for_each_pipe(pipe) {
4562 I915_WRITE(TRANS_CHICKEN1(pipe),
4563 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
4567 static void gen6_check_mch_setup(struct drm_device *dev)
4569 struct drm_i915_private *dev_priv = dev->dev_private;
4572 tmp = I915_READ(MCH_SSKPD);
4573 if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) {
4574 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp);
4575 DRM_INFO("This can cause pipe underruns and display issues.\n");
4576 DRM_INFO("Please upgrade your BIOS to fix this.\n");
4580 static void gen6_init_clock_gating(struct drm_device *dev)
4582 struct drm_i915_private *dev_priv = dev->dev_private;
4583 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
4585 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
4587 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4588 I915_READ(ILK_DISPLAY_CHICKEN2) |
4589 ILK_ELPIN_409_SELECT);
4591 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
4592 I915_WRITE(_3D_CHICKEN,
4593 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
4595 /* WaSetupGtModeTdRowDispatch:snb */
4596 if (IS_SNB_GT1(dev))
4597 I915_WRITE(GEN6_GT_MODE,
4598 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE));
4600 ilk_init_lp_watermarks(dev);
4602 I915_WRITE(CACHE_MODE_0,
4603 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
4605 I915_WRITE(GEN6_UCGCTL1,
4606 I915_READ(GEN6_UCGCTL1) |
4607 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
4608 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
4610 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4611 * gating disable must be set. Failure to set it results in
4612 * flickering pixels due to Z write ordering failures after
4613 * some amount of runtime in the Mesa "fire" demo, and Unigine
4614 * Sanctuary and Tropics, and apparently anything else with
4615 * alpha test or pixel discard.
4617 * According to the spec, bit 11 (RCCUNIT) must also be set,
4618 * but we didn't debug actual testcases to find it out.
4620 * Also apply WaDisableVDSUnitClockGating:snb and
4621 * WaDisableRCPBUnitClockGating:snb.
4623 I915_WRITE(GEN6_UCGCTL2,
4624 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
4625 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
4626 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4628 /* Bspec says we need to always set all mask bits. */
4629 I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) |
4630 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL);
4633 * According to the spec the following bits should be
4634 * set in order to enable memory self-refresh and fbc:
4635 * The bit21 and bit22 of 0x42000
4636 * The bit21 and bit22 of 0x42004
4637 * The bit5 and bit7 of 0x42020
4638 * The bit14 of 0x70180
4639 * The bit14 of 0x71180
4641 * WaFbcAsynchFlipDisableFbcQueue:snb
4643 I915_WRITE(ILK_DISPLAY_CHICKEN1,
4644 I915_READ(ILK_DISPLAY_CHICKEN1) |
4645 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
4646 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4647 I915_READ(ILK_DISPLAY_CHICKEN2) |
4648 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
4649 I915_WRITE(ILK_DSPCLK_GATE_D,
4650 I915_READ(ILK_DSPCLK_GATE_D) |
4651 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
4652 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
4654 g4x_disable_trickle_feed(dev);
4656 /* The default value should be 0x200 according to docs, but the two
4657 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
4658 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff));
4659 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI));
4661 cpt_init_clock_gating(dev);
4663 gen6_check_mch_setup(dev);
4666 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
4668 uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
4670 reg &= ~GEN7_FF_SCHED_MASK;
4671 reg |= GEN7_FF_TS_SCHED_HW;
4672 reg |= GEN7_FF_VS_SCHED_HW;
4673 reg |= GEN7_FF_DS_SCHED_HW;
4675 if (IS_HASWELL(dev_priv->dev))
4676 reg &= ~GEN7_FF_VS_REF_CNT_FFME;
4678 I915_WRITE(GEN7_FF_THREAD_MODE, reg);
4681 static void lpt_init_clock_gating(struct drm_device *dev)
4683 struct drm_i915_private *dev_priv = dev->dev_private;
4686 * TODO: this bit should only be enabled when really needed, then
4687 * disabled when not needed anymore in order to save power.
4689 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
4690 I915_WRITE(SOUTH_DSPCLK_GATE_D,
4691 I915_READ(SOUTH_DSPCLK_GATE_D) |
4692 PCH_LP_PARTITION_LEVEL_DISABLE);
4694 /* WADPOClockGatingDisable:hsw */
4695 I915_WRITE(_TRANSA_CHICKEN1,
4696 I915_READ(_TRANSA_CHICKEN1) |
4697 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
4700 static void lpt_suspend_hw(struct drm_device *dev)
4702 struct drm_i915_private *dev_priv = dev->dev_private;
4704 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
4705 uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
4707 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
4708 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
4712 static void gen8_init_clock_gating(struct drm_device *dev)
4714 struct drm_i915_private *dev_priv = dev->dev_private;
4717 I915_WRITE(WM3_LP_ILK, 0);
4718 I915_WRITE(WM2_LP_ILK, 0);
4719 I915_WRITE(WM1_LP_ILK, 0);
4721 /* FIXME(BDW): Check all the w/a, some might only apply to
4722 * pre-production hw. */
4724 WARN(!i915_preliminary_hw_support,
4725 "GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production\n");
4726 I915_WRITE(HALF_SLICE_CHICKEN3,
4727 _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS));
4728 I915_WRITE(HALF_SLICE_CHICKEN3,
4729 _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS));
4730 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
4732 I915_WRITE(_3D_CHICKEN3,
4733 _3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2));
4735 I915_WRITE(COMMON_SLICE_CHICKEN2,
4736 _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE));
4738 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4739 _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE));
4741 /* WaSwitchSolVfFArbitrationPriority:bdw */
4742 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
4744 /* WaPsrDPAMaskVBlankInSRD:bdw */
4745 I915_WRITE(CHICKEN_PAR1_1,
4746 I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD);
4748 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
4750 I915_WRITE(CHICKEN_PIPESL_1(i),
4751 I915_READ(CHICKEN_PIPESL_1(i) |
4752 DPRS_MASK_VBLANK_SRD));
4755 /* Use Force Non-Coherent whenever executing a 3D context. This is a
4756 * workaround for for a possible hang in the unlikely event a TLB
4757 * invalidation occurs during a PSD flush.
4759 I915_WRITE(HDC_CHICKEN0,
4760 I915_READ(HDC_CHICKEN0) |
4761 _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT));
4763 /* WaVSRefCountFullforceMissDisable:bdw */
4764 /* WaDSRefCountFullforceMissDisable:bdw */
4765 I915_WRITE(GEN7_FF_THREAD_MODE,
4766 I915_READ(GEN7_FF_THREAD_MODE) &
4767 ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME));
4770 static void haswell_init_clock_gating(struct drm_device *dev)
4772 struct drm_i915_private *dev_priv = dev->dev_private;
4774 ilk_init_lp_watermarks(dev);
4776 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4777 * This implements the WaDisableRCZUnitClockGating:hsw workaround.
4779 I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
4781 /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */
4782 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4783 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4785 /* WaApplyL3ControlAndL3ChickenMode:hsw */
4786 I915_WRITE(GEN7_L3CNTLREG1,
4787 GEN7_WA_FOR_GEN7_L3_CONTROL);
4788 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
4789 GEN7_WA_L3_CHICKEN_MODE);
4791 /* L3 caching of data atomics doesn't work -- disable it. */
4792 I915_WRITE(HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE);
4793 I915_WRITE(HSW_ROW_CHICKEN3,
4794 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE));
4796 /* This is required by WaCatErrorRejectionIssue:hsw */
4797 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4798 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4799 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4801 /* WaVSRefCountFullforceMissDisable:hsw */
4802 gen7_setup_fixed_func_scheduler(dev_priv);
4804 /* WaDisable4x2SubspanOptimization:hsw */
4805 I915_WRITE(CACHE_MODE_1,
4806 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4808 /* WaSwitchSolVfFArbitrationPriority:hsw */
4809 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
4811 /* WaRsPkgCStateDisplayPMReq:hsw */
4812 I915_WRITE(CHICKEN_PAR1_1,
4813 I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
4815 lpt_init_clock_gating(dev);
4818 static void ivybridge_init_clock_gating(struct drm_device *dev)
4820 struct drm_i915_private *dev_priv = dev->dev_private;
4823 ilk_init_lp_watermarks(dev);
4825 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
4827 /* WaDisableEarlyCull:ivb */
4828 I915_WRITE(_3D_CHICKEN3,
4829 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
4831 /* WaDisableBackToBackFlipFix:ivb */
4832 I915_WRITE(IVB_CHICKEN3,
4833 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
4834 CHICKEN3_DGMG_DONE_FIX_DISABLE);
4836 /* WaDisablePSDDualDispatchEnable:ivb */
4837 if (IS_IVB_GT1(dev))
4838 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4839 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4841 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2,
4842 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4844 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
4845 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4846 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4848 /* WaApplyL3ControlAndL3ChickenMode:ivb */
4849 I915_WRITE(GEN7_L3CNTLREG1,
4850 GEN7_WA_FOR_GEN7_L3_CONTROL);
4851 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
4852 GEN7_WA_L3_CHICKEN_MODE);
4853 if (IS_IVB_GT1(dev))
4854 I915_WRITE(GEN7_ROW_CHICKEN2,
4855 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4857 I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
4858 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4861 /* WaForceL3Serialization:ivb */
4862 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
4863 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
4865 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4866 * gating disable must be set. Failure to set it results in
4867 * flickering pixels due to Z write ordering failures after
4868 * some amount of runtime in the Mesa "fire" demo, and Unigine
4869 * Sanctuary and Tropics, and apparently anything else with
4870 * alpha test or pixel discard.
4872 * According to the spec, bit 11 (RCCUNIT) must also be set,
4873 * but we didn't debug actual testcases to find it out.
4875 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4876 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
4878 I915_WRITE(GEN6_UCGCTL2,
4879 GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
4880 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4882 /* This is required by WaCatErrorRejectionIssue:ivb */
4883 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4884 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4885 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4887 g4x_disable_trickle_feed(dev);
4889 /* WaVSRefCountFullforceMissDisable:ivb */
4890 gen7_setup_fixed_func_scheduler(dev_priv);
4892 /* WaDisable4x2SubspanOptimization:ivb */
4893 I915_WRITE(CACHE_MODE_1,
4894 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4896 snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
4897 snpcr &= ~GEN6_MBC_SNPCR_MASK;
4898 snpcr |= GEN6_MBC_SNPCR_MED;
4899 I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
4901 if (!HAS_PCH_NOP(dev))
4902 cpt_init_clock_gating(dev);
4904 gen6_check_mch_setup(dev);
4907 static void valleyview_init_clock_gating(struct drm_device *dev)
4909 struct drm_i915_private *dev_priv = dev->dev_private;
4912 mutex_lock(&dev_priv->rps.hw_lock);
4913 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
4914 mutex_unlock(&dev_priv->rps.hw_lock);
4915 switch ((val >> 6) & 3) {
4917 dev_priv->mem_freq = 800;
4920 dev_priv->mem_freq = 1066;
4923 dev_priv->mem_freq = 1333;
4926 dev_priv->mem_freq = 1333;
4929 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
4931 I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
4933 /* WaDisableEarlyCull:vlv */
4934 I915_WRITE(_3D_CHICKEN3,
4935 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
4937 /* WaDisableBackToBackFlipFix:vlv */
4938 I915_WRITE(IVB_CHICKEN3,
4939 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
4940 CHICKEN3_DGMG_DONE_FIX_DISABLE);
4942 /* WaDisablePSDDualDispatchEnable:vlv */
4943 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4944 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP |
4945 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4947 /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */
4948 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4949 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4951 /* WaApplyL3ControlAndL3ChickenMode:vlv */
4952 I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS);
4953 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE);
4955 /* WaForceL3Serialization:vlv */
4956 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
4957 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
4959 /* WaDisableDopClockGating:vlv */
4960 I915_WRITE(GEN7_ROW_CHICKEN2,
4961 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4963 /* This is required by WaCatErrorRejectionIssue:vlv */
4964 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4965 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4966 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4968 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4969 * gating disable must be set. Failure to set it results in
4970 * flickering pixels due to Z write ordering failures after
4971 * some amount of runtime in the Mesa "fire" demo, and Unigine
4972 * Sanctuary and Tropics, and apparently anything else with
4973 * alpha test or pixel discard.
4975 * According to the spec, bit 11 (RCCUNIT) must also be set,
4976 * but we didn't debug actual testcases to find it out.
4978 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4979 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
4981 * Also apply WaDisableVDSUnitClockGating:vlv and
4982 * WaDisableRCPBUnitClockGating:vlv.
4984 I915_WRITE(GEN6_UCGCTL2,
4985 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
4986 GEN7_TDLUNIT_CLOCK_GATE_DISABLE |
4987 GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
4988 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
4989 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4991 I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
4993 I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
4995 I915_WRITE(CACHE_MODE_1,
4996 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4999 * WaDisableVLVClockGating_VBIIssue:vlv
5000 * Disable clock gating on th GCFG unit to prevent a delay
5001 * in the reporting of vblank events.
5003 I915_WRITE(VLV_GUNIT_CLOCK_GATE, 0xffffffff);
5005 /* Conservative clock gating settings for now */
5006 I915_WRITE(0x9400, 0xffffffff);
5007 I915_WRITE(0x9404, 0xffffffff);
5008 I915_WRITE(0x9408, 0xffffffff);
5009 I915_WRITE(0x940c, 0xffffffff);
5010 I915_WRITE(0x9410, 0xffffffff);
5011 I915_WRITE(0x9414, 0xffffffff);
5012 I915_WRITE(0x9418, 0xffffffff);
5015 static void g4x_init_clock_gating(struct drm_device *dev)
5017 struct drm_i915_private *dev_priv = dev->dev_private;
5018 uint32_t dspclk_gate;
5020 I915_WRITE(RENCLK_GATE_D1, 0);
5021 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
5022 GS_UNIT_CLOCK_GATE_DISABLE |
5023 CL_UNIT_CLOCK_GATE_DISABLE);
5024 I915_WRITE(RAMCLK_GATE_D, 0);
5025 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
5026 OVRUNIT_CLOCK_GATE_DISABLE |
5027 OVCUNIT_CLOCK_GATE_DISABLE;
5029 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
5030 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
5032 /* WaDisableRenderCachePipelinedFlush */
5033 I915_WRITE(CACHE_MODE_0,
5034 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
5036 g4x_disable_trickle_feed(dev);
5039 static void crestline_init_clock_gating(struct drm_device *dev)
5041 struct drm_i915_private *dev_priv = dev->dev_private;
5043 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
5044 I915_WRITE(RENCLK_GATE_D2, 0);
5045 I915_WRITE(DSPCLK_GATE_D, 0);
5046 I915_WRITE(RAMCLK_GATE_D, 0);
5047 I915_WRITE16(DEUC, 0);
5048 I915_WRITE(MI_ARB_STATE,
5049 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5052 static void broadwater_init_clock_gating(struct drm_device *dev)
5054 struct drm_i915_private *dev_priv = dev->dev_private;
5056 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
5057 I965_RCC_CLOCK_GATE_DISABLE |
5058 I965_RCPB_CLOCK_GATE_DISABLE |
5059 I965_ISC_CLOCK_GATE_DISABLE |
5060 I965_FBC_CLOCK_GATE_DISABLE);
5061 I915_WRITE(RENCLK_GATE_D2, 0);
5062 I915_WRITE(MI_ARB_STATE,
5063 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5066 static void gen3_init_clock_gating(struct drm_device *dev)
5068 struct drm_i915_private *dev_priv = dev->dev_private;
5069 u32 dstate = I915_READ(D_STATE);
5071 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
5072 DSTATE_DOT_CLOCK_GATING;
5073 I915_WRITE(D_STATE, dstate);
5075 if (IS_PINEVIEW(dev))
5076 I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
5078 /* IIR "flip pending" means done if this bit is set */
5079 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
5082 static void i85x_init_clock_gating(struct drm_device *dev)
5084 struct drm_i915_private *dev_priv = dev->dev_private;
5086 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
5089 static void i830_init_clock_gating(struct drm_device *dev)
5091 struct drm_i915_private *dev_priv = dev->dev_private;
5093 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
5096 void intel_init_clock_gating(struct drm_device *dev)
5098 struct drm_i915_private *dev_priv = dev->dev_private;
5100 dev_priv->display.init_clock_gating(dev);
5103 void intel_suspend_hw(struct drm_device *dev)
5105 if (HAS_PCH_LPT(dev))
5106 lpt_suspend_hw(dev);
5109 #define for_each_power_well(i, power_well, domain_mask, power_domains) \
5111 i < (power_domains)->power_well_count && \
5112 ((power_well) = &(power_domains)->power_wells[i]); \
5114 if ((power_well)->domains & (domain_mask))
5116 #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \
5117 for (i = (power_domains)->power_well_count - 1; \
5118 i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\
5120 if ((power_well)->domains & (domain_mask))
5123 * We should only use the power well if we explicitly asked the hardware to
5124 * enable it, so check if it's enabled and also check if we've requested it to
5127 static bool hsw_power_well_enabled(struct drm_device *dev,
5128 struct i915_power_well *power_well)
5130 struct drm_i915_private *dev_priv = dev->dev_private;
5132 return I915_READ(HSW_PWR_WELL_DRIVER) ==
5133 (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED);
5136 bool intel_display_power_enabled_sw(struct drm_device *dev,
5137 enum intel_display_power_domain domain)
5139 struct drm_i915_private *dev_priv = dev->dev_private;
5140 struct i915_power_domains *power_domains;
5142 power_domains = &dev_priv->power_domains;
5144 return power_domains->domain_use_count[domain];
5147 bool intel_display_power_enabled(struct drm_device *dev,
5148 enum intel_display_power_domain domain)
5150 struct drm_i915_private *dev_priv = dev->dev_private;
5151 struct i915_power_domains *power_domains;
5152 struct i915_power_well *power_well;
5156 power_domains = &dev_priv->power_domains;
5160 mutex_lock(&power_domains->lock);
5161 for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
5162 if (power_well->always_on)
5165 if (!power_well->is_enabled(dev, power_well)) {
5170 mutex_unlock(&power_domains->lock);
5175 static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
5177 struct drm_device *dev = dev_priv->dev;
5178 unsigned long irqflags;
5181 * After we re-enable the power well, if we touch VGA register 0x3d5
5182 * we'll get unclaimed register interrupts. This stops after we write
5183 * anything to the VGA MSR register. The vgacon module uses this
5184 * register all the time, so if we unbind our driver and, as a
5185 * consequence, bind vgacon, we'll get stuck in an infinite loop at
5186 * console_unlock(). So make here we touch the VGA MSR register, making
5187 * sure vgacon can keep working normally without triggering interrupts
5188 * and error messages.
5190 vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
5191 outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
5192 vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
5194 if (IS_BROADWELL(dev)) {
5195 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
5196 I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_B),
5197 dev_priv->de_irq_mask[PIPE_B]);
5198 I915_WRITE(GEN8_DE_PIPE_IER(PIPE_B),
5199 ~dev_priv->de_irq_mask[PIPE_B] |
5201 I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_C),
5202 dev_priv->de_irq_mask[PIPE_C]);
5203 I915_WRITE(GEN8_DE_PIPE_IER(PIPE_C),
5204 ~dev_priv->de_irq_mask[PIPE_C] |
5206 POSTING_READ(GEN8_DE_PIPE_IER(PIPE_C));
5207 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
5211 static void hsw_power_well_post_disable(struct drm_i915_private *dev_priv)
5213 struct drm_device *dev = dev_priv->dev;
5215 unsigned long irqflags;
5218 * After this, the registers on the pipes that are part of the power
5219 * well will become zero, so we have to adjust our counters according to
5222 * FIXME: Should we do this in general in drm_vblank_post_modeset?
5224 spin_lock_irqsave(&dev->vbl_lock, irqflags);
5227 dev->vblank[p].last = 0;
5228 spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
5231 static void hsw_set_power_well(struct drm_device *dev,
5232 struct i915_power_well *power_well, bool enable)
5234 struct drm_i915_private *dev_priv = dev->dev_private;
5235 bool is_enabled, enable_requested;
5238 WARN_ON(dev_priv->pc8.enabled);
5240 tmp = I915_READ(HSW_PWR_WELL_DRIVER);
5241 is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED;
5242 enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST;
5245 if (!enable_requested)
5246 I915_WRITE(HSW_PWR_WELL_DRIVER,
5247 HSW_PWR_WELL_ENABLE_REQUEST);
5250 DRM_DEBUG_KMS("Enabling power well\n");
5251 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
5252 HSW_PWR_WELL_STATE_ENABLED), 20))
5253 DRM_ERROR("Timeout enabling power well\n");
5256 hsw_power_well_post_enable(dev_priv);
5258 if (enable_requested) {
5259 I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
5260 POSTING_READ(HSW_PWR_WELL_DRIVER);
5261 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5263 hsw_power_well_post_disable(dev_priv);
5268 static void __intel_power_well_get(struct drm_device *dev,
5269 struct i915_power_well *power_well)
5271 struct drm_i915_private *dev_priv = dev->dev_private;
5273 if (!power_well->count++ && power_well->set) {
5274 hsw_disable_package_c8(dev_priv);
5275 power_well->set(dev, power_well, true);
5279 static void __intel_power_well_put(struct drm_device *dev,
5280 struct i915_power_well *power_well)
5282 struct drm_i915_private *dev_priv = dev->dev_private;
5284 WARN_ON(!power_well->count);
5286 if (!--power_well->count && power_well->set &&
5287 i915_disable_power_well) {
5288 power_well->set(dev, power_well, false);
5289 hsw_enable_package_c8(dev_priv);
5293 void intel_display_power_get(struct drm_device *dev,
5294 enum intel_display_power_domain domain)
5296 struct drm_i915_private *dev_priv = dev->dev_private;
5297 struct i915_power_domains *power_domains;
5298 struct i915_power_well *power_well;
5301 power_domains = &dev_priv->power_domains;
5303 mutex_lock(&power_domains->lock);
5305 for_each_power_well(i, power_well, BIT(domain), power_domains)
5306 __intel_power_well_get(dev, power_well);
5308 power_domains->domain_use_count[domain]++;
5310 mutex_unlock(&power_domains->lock);
5313 void intel_display_power_put(struct drm_device *dev,
5314 enum intel_display_power_domain domain)
5316 struct drm_i915_private *dev_priv = dev->dev_private;
5317 struct i915_power_domains *power_domains;
5318 struct i915_power_well *power_well;
5321 power_domains = &dev_priv->power_domains;
5323 mutex_lock(&power_domains->lock);
5325 WARN_ON(!power_domains->domain_use_count[domain]);
5326 power_domains->domain_use_count[domain]--;
5328 for_each_power_well_rev(i, power_well, BIT(domain), power_domains)
5329 __intel_power_well_put(dev, power_well);
5331 mutex_unlock(&power_domains->lock);
5334 static struct i915_power_domains *hsw_pwr;
5336 /* Display audio driver power well request */
5337 void i915_request_power_well(void)
5339 struct drm_i915_private *dev_priv;
5341 if (WARN_ON(!hsw_pwr))
5344 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
5346 intel_display_power_get(dev_priv->dev, POWER_DOMAIN_AUDIO);
5348 EXPORT_SYMBOL_GPL(i915_request_power_well);
5350 /* Display audio driver power well release */
5351 void i915_release_power_well(void)
5353 struct drm_i915_private *dev_priv;
5355 if (WARN_ON(!hsw_pwr))
5358 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
5360 intel_display_power_put(dev_priv->dev, POWER_DOMAIN_AUDIO);
5362 EXPORT_SYMBOL_GPL(i915_release_power_well);
5364 static struct i915_power_well i9xx_always_on_power_well[] = {
5366 .name = "always-on",
5368 .domains = POWER_DOMAIN_MASK,
5372 static struct i915_power_well hsw_power_wells[] = {
5374 .name = "always-on",
5376 .domains = HSW_ALWAYS_ON_POWER_DOMAINS,
5380 .domains = POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS,
5381 .is_enabled = hsw_power_well_enabled,
5382 .set = hsw_set_power_well,
5386 static struct i915_power_well bdw_power_wells[] = {
5388 .name = "always-on",
5390 .domains = BDW_ALWAYS_ON_POWER_DOMAINS,
5394 .domains = POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS,
5395 .is_enabled = hsw_power_well_enabled,
5396 .set = hsw_set_power_well,
5400 #define set_power_wells(power_domains, __power_wells) ({ \
5401 (power_domains)->power_wells = (__power_wells); \
5402 (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \
5405 int intel_power_domains_init(struct drm_device *dev)
5407 struct drm_i915_private *dev_priv = dev->dev_private;
5408 struct i915_power_domains *power_domains = &dev_priv->power_domains;
5410 mutex_init(&power_domains->lock);
5413 * The enabling order will be from lower to higher indexed wells,
5414 * the disabling order is reversed.
5416 if (IS_HASWELL(dev)) {
5417 set_power_wells(power_domains, hsw_power_wells);
5418 hsw_pwr = power_domains;
5419 } else if (IS_BROADWELL(dev)) {
5420 set_power_wells(power_domains, bdw_power_wells);
5421 hsw_pwr = power_domains;
5423 set_power_wells(power_domains, i9xx_always_on_power_well);
5429 void intel_power_domains_remove(struct drm_device *dev)
5434 static void intel_power_domains_resume(struct drm_device *dev)
5436 struct drm_i915_private *dev_priv = dev->dev_private;
5437 struct i915_power_domains *power_domains = &dev_priv->power_domains;
5438 struct i915_power_well *power_well;
5441 mutex_lock(&power_domains->lock);
5442 for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) {
5443 if (power_well->set)
5444 power_well->set(dev, power_well, power_well->count > 0);
5446 mutex_unlock(&power_domains->lock);
5450 * Starting with Haswell, we have a "Power Down Well" that can be turned off
5451 * when not needed anymore. We have 4 registers that can request the power well
5452 * to be enabled, and it will only be disabled if none of the registers is
5453 * requesting it to be enabled.
5455 void intel_power_domains_init_hw(struct drm_device *dev)
5457 struct drm_i915_private *dev_priv = dev->dev_private;
5459 /* For now, we need the power well to be always enabled. */
5460 intel_display_set_init_power(dev, true);
5461 intel_power_domains_resume(dev);
5463 if (!(IS_HASWELL(dev) || IS_BROADWELL(dev)))
5466 /* We're taking over the BIOS, so clear any requests made by it since
5467 * the driver is in charge now. */
5468 if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST)
5469 I915_WRITE(HSW_PWR_WELL_BIOS, 0);
5472 /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */
5473 void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv)
5475 hsw_disable_package_c8(dev_priv);
5478 void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv)
5480 hsw_enable_package_c8(dev_priv);
5483 void intel_runtime_pm_get(struct drm_i915_private *dev_priv)
5485 struct drm_device *dev = dev_priv->dev;
5486 struct device *device = &dev->pdev->dev;
5488 if (!HAS_RUNTIME_PM(dev))
5491 pm_runtime_get_sync(device);
5492 WARN(dev_priv->pm.suspended, "Device still suspended.\n");
5495 void intel_runtime_pm_put(struct drm_i915_private *dev_priv)
5497 struct drm_device *dev = dev_priv->dev;
5498 struct device *device = &dev->pdev->dev;
5500 if (!HAS_RUNTIME_PM(dev))
5503 pm_runtime_mark_last_busy(device);
5504 pm_runtime_put_autosuspend(device);
5507 void intel_init_runtime_pm(struct drm_i915_private *dev_priv)
5509 struct drm_device *dev = dev_priv->dev;
5510 struct device *device = &dev->pdev->dev;
5512 dev_priv->pm.suspended = false;
5514 if (!HAS_RUNTIME_PM(dev))
5517 pm_runtime_set_active(device);
5519 pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */
5520 pm_runtime_mark_last_busy(device);
5521 pm_runtime_use_autosuspend(device);
5524 void intel_fini_runtime_pm(struct drm_i915_private *dev_priv)
5526 struct drm_device *dev = dev_priv->dev;
5527 struct device *device = &dev->pdev->dev;
5529 if (!HAS_RUNTIME_PM(dev))
5532 /* Make sure we're not suspended first. */
5533 pm_runtime_get_sync(device);
5534 pm_runtime_disable(device);
5537 /* Set up chip specific power management-related functions */
5538 void intel_init_pm(struct drm_device *dev)
5540 struct drm_i915_private *dev_priv = dev->dev_private;
5543 if (INTEL_INFO(dev)->gen >= 7) {
5544 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5545 dev_priv->display.enable_fbc = gen7_enable_fbc;
5546 dev_priv->display.disable_fbc = ironlake_disable_fbc;
5547 } else if (INTEL_INFO(dev)->gen >= 5) {
5548 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5549 dev_priv->display.enable_fbc = ironlake_enable_fbc;
5550 dev_priv->display.disable_fbc = ironlake_disable_fbc;
5551 } else if (IS_GM45(dev)) {
5552 dev_priv->display.fbc_enabled = g4x_fbc_enabled;
5553 dev_priv->display.enable_fbc = g4x_enable_fbc;
5554 dev_priv->display.disable_fbc = g4x_disable_fbc;
5556 dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
5557 dev_priv->display.enable_fbc = i8xx_enable_fbc;
5558 dev_priv->display.disable_fbc = i8xx_disable_fbc;
5560 /* This value was pulled out of someone's hat */
5561 I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT);
5566 if (IS_PINEVIEW(dev))
5567 i915_pineview_get_mem_freq(dev);
5568 else if (IS_GEN5(dev))
5569 i915_ironlake_get_mem_freq(dev);
5571 /* For FIFO watermark updates */
5572 if (HAS_PCH_SPLIT(dev)) {
5573 intel_setup_wm_latency(dev);
5575 if ((IS_GEN5(dev) && dev_priv->wm.pri_latency[1] &&
5576 dev_priv->wm.spr_latency[1] && dev_priv->wm.cur_latency[1]) ||
5577 (!IS_GEN5(dev) && dev_priv->wm.pri_latency[0] &&
5578 dev_priv->wm.spr_latency[0] && dev_priv->wm.cur_latency[0])) {
5579 dev_priv->display.update_wm = ilk_update_wm;
5580 dev_priv->display.update_sprite_wm = ilk_update_sprite_wm;
5582 DRM_DEBUG_KMS("Failed to read display plane latency. "
5587 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
5588 else if (IS_GEN6(dev))
5589 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
5590 else if (IS_IVYBRIDGE(dev))
5591 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
5592 else if (IS_HASWELL(dev))
5593 dev_priv->display.init_clock_gating = haswell_init_clock_gating;
5594 else if (INTEL_INFO(dev)->gen == 8)
5595 dev_priv->display.init_clock_gating = gen8_init_clock_gating;
5596 } else if (IS_VALLEYVIEW(dev)) {
5597 dev_priv->display.update_wm = valleyview_update_wm;
5598 dev_priv->display.init_clock_gating =
5599 valleyview_init_clock_gating;
5600 } else if (IS_PINEVIEW(dev)) {
5601 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
5604 dev_priv->mem_freq)) {
5605 DRM_INFO("failed to find known CxSR latency "
5606 "(found ddr%s fsb freq %d, mem freq %d), "
5608 (dev_priv->is_ddr3 == 1) ? "3" : "2",
5609 dev_priv->fsb_freq, dev_priv->mem_freq);
5610 /* Disable CxSR and never update its watermark again */
5611 pineview_disable_cxsr(dev);
5612 dev_priv->display.update_wm = NULL;
5614 dev_priv->display.update_wm = pineview_update_wm;
5615 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
5616 } else if (IS_G4X(dev)) {
5617 dev_priv->display.update_wm = g4x_update_wm;
5618 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
5619 } else if (IS_GEN4(dev)) {
5620 dev_priv->display.update_wm = i965_update_wm;
5621 if (IS_CRESTLINE(dev))
5622 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
5623 else if (IS_BROADWATER(dev))
5624 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
5625 } else if (IS_GEN3(dev)) {
5626 dev_priv->display.update_wm = i9xx_update_wm;
5627 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
5628 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
5629 } else if (IS_GEN2(dev)) {
5630 if (INTEL_INFO(dev)->num_pipes == 1) {
5631 dev_priv->display.update_wm = i845_update_wm;
5632 dev_priv->display.get_fifo_size = i845_get_fifo_size;
5634 dev_priv->display.update_wm = i9xx_update_wm;
5635 dev_priv->display.get_fifo_size = i830_get_fifo_size;
5638 if (IS_I85X(dev) || IS_I865G(dev))
5639 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
5641 dev_priv->display.init_clock_gating = i830_init_clock_gating;
5643 DRM_ERROR("unexpected fall-through in intel_init_pm\n");
5647 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
5649 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5651 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
5652 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
5656 I915_WRITE(GEN6_PCODE_DATA, *val);
5657 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
5659 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
5661 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
5665 *val = I915_READ(GEN6_PCODE_DATA);
5666 I915_WRITE(GEN6_PCODE_DATA, 0);
5671 int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
5673 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5675 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
5676 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
5680 I915_WRITE(GEN6_PCODE_DATA, val);
5681 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
5683 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
5685 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
5689 I915_WRITE(GEN6_PCODE_DATA, 0);
5694 int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val)
5699 switch (dev_priv->mem_freq) {
5713 return DIV_ROUND_CLOSEST(dev_priv->mem_freq * (val + 6 - 0xbd), 4 * div);
5716 int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val)
5721 switch (dev_priv->mem_freq) {
5735 return DIV_ROUND_CLOSEST(4 * mul * val, dev_priv->mem_freq) + 0xbd - 6;
5738 void intel_pm_setup(struct drm_device *dev)
5740 struct drm_i915_private *dev_priv = dev->dev_private;
5742 mutex_init(&dev_priv->rps.hw_lock);
5744 mutex_init(&dev_priv->pc8.lock);
5745 dev_priv->pc8.requirements_met = false;
5746 dev_priv->pc8.gpu_idle = false;
5747 dev_priv->pc8.irqs_disabled = false;
5748 dev_priv->pc8.enabled = false;
5749 dev_priv->pc8.disable_count = 2; /* requirements_met + gpu_idle */
5750 INIT_DELAYED_WORK(&dev_priv->pc8.enable_work, hsw_enable_pc8_work);
5751 INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
5752 intel_gen6_powersave_work);