2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
28 #include <linux/cpufreq.h>
30 #include "intel_drv.h"
31 #include "../../../platform/x86/intel_ips.h"
32 #include <linux/module.h>
33 #include <drm/i915_powerwell.h>
35 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
36 * framebuffer contents in-memory, aiming at reducing the required bandwidth
37 * during in-memory transfers and, therefore, reduce the power packet.
39 * The benefits of FBC are mostly visible with solid backgrounds and
40 * variation-less patterns.
42 * FBC-related functionality can be enabled by the means of the
43 * i915.i915_enable_fbc parameter
46 static void i8xx_disable_fbc(struct drm_device
*dev
)
48 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
51 /* Disable compression */
52 fbc_ctl
= I915_READ(FBC_CONTROL
);
53 if ((fbc_ctl
& FBC_CTL_EN
) == 0)
56 fbc_ctl
&= ~FBC_CTL_EN
;
57 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
59 /* Wait for compressing bit to clear */
60 if (wait_for((I915_READ(FBC_STATUS
) & FBC_STAT_COMPRESSING
) == 0, 10)) {
61 DRM_DEBUG_KMS("FBC idle timed out\n");
65 DRM_DEBUG_KMS("disabled FBC\n");
68 static void i8xx_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
70 struct drm_device
*dev
= crtc
->dev
;
71 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
72 struct drm_framebuffer
*fb
= crtc
->fb
;
73 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
74 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
75 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
78 u32 fbc_ctl
, fbc_ctl2
;
80 cfb_pitch
= dev_priv
->fbc
.size
/ FBC_LL_SIZE
;
81 if (fb
->pitches
[0] < cfb_pitch
)
82 cfb_pitch
= fb
->pitches
[0];
84 /* FBC_CTL wants 64B units */
85 cfb_pitch
= (cfb_pitch
/ 64) - 1;
86 plane
= intel_crtc
->plane
== 0 ? FBC_CTL_PLANEA
: FBC_CTL_PLANEB
;
89 for (i
= 0; i
< (FBC_LL_SIZE
/ 32) + 1; i
++)
90 I915_WRITE(FBC_TAG
+ (i
* 4), 0);
93 fbc_ctl2
= FBC_CTL_FENCE_DBL
| FBC_CTL_IDLE_IMM
| FBC_CTL_CPU_FENCE
;
95 I915_WRITE(FBC_CONTROL2
, fbc_ctl2
);
96 I915_WRITE(FBC_FENCE_OFF
, crtc
->y
);
99 fbc_ctl
= FBC_CTL_EN
| FBC_CTL_PERIODIC
;
101 fbc_ctl
|= FBC_CTL_C3_IDLE
; /* 945 needs special SR handling */
102 fbc_ctl
|= (cfb_pitch
& 0xff) << FBC_CTL_STRIDE_SHIFT
;
103 fbc_ctl
|= (interval
& 0x2fff) << FBC_CTL_INTERVAL_SHIFT
;
104 fbc_ctl
|= obj
->fence_reg
;
105 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
107 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ",
108 cfb_pitch
, crtc
->y
, plane_name(intel_crtc
->plane
));
111 static bool i8xx_fbc_enabled(struct drm_device
*dev
)
113 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
115 return I915_READ(FBC_CONTROL
) & FBC_CTL_EN
;
118 static void g4x_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
120 struct drm_device
*dev
= crtc
->dev
;
121 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
122 struct drm_framebuffer
*fb
= crtc
->fb
;
123 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
124 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
125 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
126 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
127 unsigned long stall_watermark
= 200;
130 dpfc_ctl
= plane
| DPFC_SR_EN
| DPFC_CTL_LIMIT_1X
;
131 dpfc_ctl
|= DPFC_CTL_FENCE_EN
| obj
->fence_reg
;
132 I915_WRITE(DPFC_CHICKEN
, DPFC_HT_MODIFY
);
134 I915_WRITE(DPFC_RECOMP_CTL
, DPFC_RECOMP_STALL_EN
|
135 (stall_watermark
<< DPFC_RECOMP_STALL_WM_SHIFT
) |
136 (interval
<< DPFC_RECOMP_TIMER_COUNT_SHIFT
));
137 I915_WRITE(DPFC_FENCE_YOFF
, crtc
->y
);
140 I915_WRITE(DPFC_CONTROL
, I915_READ(DPFC_CONTROL
) | DPFC_CTL_EN
);
142 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
145 static void g4x_disable_fbc(struct drm_device
*dev
)
147 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
150 /* Disable compression */
151 dpfc_ctl
= I915_READ(DPFC_CONTROL
);
152 if (dpfc_ctl
& DPFC_CTL_EN
) {
153 dpfc_ctl
&= ~DPFC_CTL_EN
;
154 I915_WRITE(DPFC_CONTROL
, dpfc_ctl
);
156 DRM_DEBUG_KMS("disabled FBC\n");
160 static bool g4x_fbc_enabled(struct drm_device
*dev
)
162 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
164 return I915_READ(DPFC_CONTROL
) & DPFC_CTL_EN
;
167 static void sandybridge_blit_fbc_update(struct drm_device
*dev
)
169 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
172 /* Make sure blitter notifies FBC of writes */
173 gen6_gt_force_wake_get(dev_priv
);
174 blt_ecoskpd
= I915_READ(GEN6_BLITTER_ECOSKPD
);
175 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
<<
176 GEN6_BLITTER_LOCK_SHIFT
;
177 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
178 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
;
179 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
180 blt_ecoskpd
&= ~(GEN6_BLITTER_FBC_NOTIFY
<<
181 GEN6_BLITTER_LOCK_SHIFT
);
182 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
183 POSTING_READ(GEN6_BLITTER_ECOSKPD
);
184 gen6_gt_force_wake_put(dev_priv
);
187 static void ironlake_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
189 struct drm_device
*dev
= crtc
->dev
;
190 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
191 struct drm_framebuffer
*fb
= crtc
->fb
;
192 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
193 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
194 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
195 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
196 unsigned long stall_watermark
= 200;
199 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
200 dpfc_ctl
&= DPFC_RESERVED
;
201 dpfc_ctl
|= (plane
| DPFC_CTL_LIMIT_1X
);
202 /* Set persistent mode for front-buffer rendering, ala X. */
203 dpfc_ctl
|= DPFC_CTL_PERSISTENT_MODE
;
204 dpfc_ctl
|= (DPFC_CTL_FENCE_EN
| obj
->fence_reg
);
205 I915_WRITE(ILK_DPFC_CHICKEN
, DPFC_HT_MODIFY
);
207 I915_WRITE(ILK_DPFC_RECOMP_CTL
, DPFC_RECOMP_STALL_EN
|
208 (stall_watermark
<< DPFC_RECOMP_STALL_WM_SHIFT
) |
209 (interval
<< DPFC_RECOMP_TIMER_COUNT_SHIFT
));
210 I915_WRITE(ILK_DPFC_FENCE_YOFF
, crtc
->y
);
211 I915_WRITE(ILK_FBC_RT_BASE
, i915_gem_obj_ggtt_offset(obj
) | ILK_FBC_RT_VALID
);
213 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
| DPFC_CTL_EN
);
216 I915_WRITE(SNB_DPFC_CTL_SA
,
217 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
218 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
219 sandybridge_blit_fbc_update(dev
);
222 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
225 static void ironlake_disable_fbc(struct drm_device
*dev
)
227 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
230 /* Disable compression */
231 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
232 if (dpfc_ctl
& DPFC_CTL_EN
) {
233 dpfc_ctl
&= ~DPFC_CTL_EN
;
234 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
);
236 if (IS_IVYBRIDGE(dev
))
237 /* WaFbcDisableDpfcClockGating:ivb */
238 I915_WRITE(ILK_DSPCLK_GATE_D
,
239 I915_READ(ILK_DSPCLK_GATE_D
) &
240 ~ILK_DPFCUNIT_CLOCK_GATE_DISABLE
);
243 /* WaFbcDisableDpfcClockGating:hsw */
244 I915_WRITE(HSW_CLKGATE_DISABLE_PART_1
,
245 I915_READ(HSW_CLKGATE_DISABLE_PART_1
) &
246 ~HSW_DPFC_GATING_DISABLE
);
248 DRM_DEBUG_KMS("disabled FBC\n");
252 static bool ironlake_fbc_enabled(struct drm_device
*dev
)
254 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
256 return I915_READ(ILK_DPFC_CONTROL
) & DPFC_CTL_EN
;
259 static void gen7_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
261 struct drm_device
*dev
= crtc
->dev
;
262 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
263 struct drm_framebuffer
*fb
= crtc
->fb
;
264 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
265 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
266 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
268 I915_WRITE(IVB_FBC_RT_BASE
, i915_gem_obj_ggtt_offset(obj
));
270 I915_WRITE(ILK_DPFC_CONTROL
, DPFC_CTL_EN
| DPFC_CTL_LIMIT_1X
|
271 IVB_DPFC_CTL_FENCE_EN
|
272 intel_crtc
->plane
<< IVB_DPFC_CTL_PLANE_SHIFT
);
274 if (IS_IVYBRIDGE(dev
)) {
275 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
276 I915_WRITE(ILK_DISPLAY_CHICKEN1
, ILK_FBCQ_DIS
);
277 /* WaFbcDisableDpfcClockGating:ivb */
278 I915_WRITE(ILK_DSPCLK_GATE_D
,
279 I915_READ(ILK_DSPCLK_GATE_D
) |
280 ILK_DPFCUNIT_CLOCK_GATE_DISABLE
);
282 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
283 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc
->pipe
),
284 HSW_BYPASS_FBC_QUEUE
);
285 /* WaFbcDisableDpfcClockGating:hsw */
286 I915_WRITE(HSW_CLKGATE_DISABLE_PART_1
,
287 I915_READ(HSW_CLKGATE_DISABLE_PART_1
) |
288 HSW_DPFC_GATING_DISABLE
);
291 I915_WRITE(SNB_DPFC_CTL_SA
,
292 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
293 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
295 sandybridge_blit_fbc_update(dev
);
297 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc
->plane
);
300 bool intel_fbc_enabled(struct drm_device
*dev
)
302 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
304 if (!dev_priv
->display
.fbc_enabled
)
307 return dev_priv
->display
.fbc_enabled(dev
);
310 static void intel_fbc_work_fn(struct work_struct
*__work
)
312 struct intel_fbc_work
*work
=
313 container_of(to_delayed_work(__work
),
314 struct intel_fbc_work
, work
);
315 struct drm_device
*dev
= work
->crtc
->dev
;
316 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
318 mutex_lock(&dev
->struct_mutex
);
319 if (work
== dev_priv
->fbc
.fbc_work
) {
320 /* Double check that we haven't switched fb without cancelling
323 if (work
->crtc
->fb
== work
->fb
) {
324 dev_priv
->display
.enable_fbc(work
->crtc
,
327 dev_priv
->fbc
.plane
= to_intel_crtc(work
->crtc
)->plane
;
328 dev_priv
->fbc
.fb_id
= work
->crtc
->fb
->base
.id
;
329 dev_priv
->fbc
.y
= work
->crtc
->y
;
332 dev_priv
->fbc
.fbc_work
= NULL
;
334 mutex_unlock(&dev
->struct_mutex
);
339 static void intel_cancel_fbc_work(struct drm_i915_private
*dev_priv
)
341 if (dev_priv
->fbc
.fbc_work
== NULL
)
344 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
346 /* Synchronisation is provided by struct_mutex and checking of
347 * dev_priv->fbc.fbc_work, so we can perform the cancellation
348 * entirely asynchronously.
350 if (cancel_delayed_work(&dev_priv
->fbc
.fbc_work
->work
))
351 /* tasklet was killed before being run, clean up */
352 kfree(dev_priv
->fbc
.fbc_work
);
354 /* Mark the work as no longer wanted so that if it does
355 * wake-up (because the work was already running and waiting
356 * for our mutex), it will discover that is no longer
359 dev_priv
->fbc
.fbc_work
= NULL
;
362 static void intel_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
364 struct intel_fbc_work
*work
;
365 struct drm_device
*dev
= crtc
->dev
;
366 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
368 if (!dev_priv
->display
.enable_fbc
)
371 intel_cancel_fbc_work(dev_priv
);
373 work
= kzalloc(sizeof(*work
), GFP_KERNEL
);
375 DRM_ERROR("Failed to allocate FBC work structure\n");
376 dev_priv
->display
.enable_fbc(crtc
, interval
);
382 work
->interval
= interval
;
383 INIT_DELAYED_WORK(&work
->work
, intel_fbc_work_fn
);
385 dev_priv
->fbc
.fbc_work
= work
;
387 /* Delay the actual enabling to let pageflipping cease and the
388 * display to settle before starting the compression. Note that
389 * this delay also serves a second purpose: it allows for a
390 * vblank to pass after disabling the FBC before we attempt
391 * to modify the control registers.
393 * A more complicated solution would involve tracking vblanks
394 * following the termination of the page-flipping sequence
395 * and indeed performing the enable as a co-routine and not
396 * waiting synchronously upon the vblank.
398 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
400 schedule_delayed_work(&work
->work
, msecs_to_jiffies(50));
403 void intel_disable_fbc(struct drm_device
*dev
)
405 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
407 intel_cancel_fbc_work(dev_priv
);
409 if (!dev_priv
->display
.disable_fbc
)
412 dev_priv
->display
.disable_fbc(dev
);
413 dev_priv
->fbc
.plane
= -1;
416 static bool set_no_fbc_reason(struct drm_i915_private
*dev_priv
,
417 enum no_fbc_reason reason
)
419 if (dev_priv
->fbc
.no_fbc_reason
== reason
)
422 dev_priv
->fbc
.no_fbc_reason
= reason
;
427 * intel_update_fbc - enable/disable FBC as needed
428 * @dev: the drm_device
430 * Set up the framebuffer compression hardware at mode set time. We
431 * enable it if possible:
432 * - plane A only (on pre-965)
433 * - no pixel mulitply/line duplication
434 * - no alpha buffer discard
436 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
438 * We can't assume that any compression will take place (worst case),
439 * so the compressed buffer has to be the same size as the uncompressed
440 * one. It also must reside (along with the line length buffer) in
443 * We need to enable/disable FBC on a global basis.
445 void intel_update_fbc(struct drm_device
*dev
)
447 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
448 struct drm_crtc
*crtc
= NULL
, *tmp_crtc
;
449 struct intel_crtc
*intel_crtc
;
450 struct drm_framebuffer
*fb
;
451 struct intel_framebuffer
*intel_fb
;
452 struct drm_i915_gem_object
*obj
;
453 const struct drm_display_mode
*adjusted_mode
;
454 unsigned int max_width
, max_height
;
456 if (!I915_HAS_FBC(dev
)) {
457 set_no_fbc_reason(dev_priv
, FBC_UNSUPPORTED
);
461 if (!i915_powersave
) {
462 if (set_no_fbc_reason(dev_priv
, FBC_MODULE_PARAM
))
463 DRM_DEBUG_KMS("fbc disabled per module param\n");
468 * If FBC is already on, we just have to verify that we can
469 * keep it that way...
470 * Need to disable if:
471 * - more than one pipe is active
472 * - changing FBC params (stride, fence, mode)
473 * - new fb is too large to fit in compressed buffer
474 * - going to an unsupported config (interlace, pixel multiply, etc.)
476 list_for_each_entry(tmp_crtc
, &dev
->mode_config
.crtc_list
, head
) {
477 if (intel_crtc_active(tmp_crtc
) &&
478 to_intel_crtc(tmp_crtc
)->primary_enabled
) {
480 if (set_no_fbc_reason(dev_priv
, FBC_MULTIPLE_PIPES
))
481 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
488 if (!crtc
|| crtc
->fb
== NULL
) {
489 if (set_no_fbc_reason(dev_priv
, FBC_NO_OUTPUT
))
490 DRM_DEBUG_KMS("no output, disabling\n");
494 intel_crtc
= to_intel_crtc(crtc
);
496 intel_fb
= to_intel_framebuffer(fb
);
498 adjusted_mode
= &intel_crtc
->config
.adjusted_mode
;
500 if (i915_enable_fbc
< 0 &&
501 INTEL_INFO(dev
)->gen
<= 7 && !IS_HASWELL(dev
)) {
502 if (set_no_fbc_reason(dev_priv
, FBC_CHIP_DEFAULT
))
503 DRM_DEBUG_KMS("disabled per chip default\n");
506 if (!i915_enable_fbc
) {
507 if (set_no_fbc_reason(dev_priv
, FBC_MODULE_PARAM
))
508 DRM_DEBUG_KMS("fbc disabled per module param\n");
511 if ((adjusted_mode
->flags
& DRM_MODE_FLAG_INTERLACE
) ||
512 (adjusted_mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)) {
513 if (set_no_fbc_reason(dev_priv
, FBC_UNSUPPORTED_MODE
))
514 DRM_DEBUG_KMS("mode incompatible with compression, "
519 if (IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
526 if (intel_crtc
->config
.pipe_src_w
> max_width
||
527 intel_crtc
->config
.pipe_src_h
> max_height
) {
528 if (set_no_fbc_reason(dev_priv
, FBC_MODE_TOO_LARGE
))
529 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
532 if ((IS_I915GM(dev
) || IS_I945GM(dev
) || IS_HASWELL(dev
)) &&
533 intel_crtc
->plane
!= 0) {
534 if (set_no_fbc_reason(dev_priv
, FBC_BAD_PLANE
))
535 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
539 /* The use of a CPU fence is mandatory in order to detect writes
540 * by the CPU to the scanout and trigger updates to the FBC.
542 if (obj
->tiling_mode
!= I915_TILING_X
||
543 obj
->fence_reg
== I915_FENCE_REG_NONE
) {
544 if (set_no_fbc_reason(dev_priv
, FBC_NOT_TILED
))
545 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
549 /* If the kernel debugger is active, always disable compression */
553 if (i915_gem_stolen_setup_compression(dev
, intel_fb
->obj
->base
.size
)) {
554 if (set_no_fbc_reason(dev_priv
, FBC_STOLEN_TOO_SMALL
))
555 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
559 /* If the scanout has not changed, don't modify the FBC settings.
560 * Note that we make the fundamental assumption that the fb->obj
561 * cannot be unpinned (and have its GTT offset and fence revoked)
562 * without first being decoupled from the scanout and FBC disabled.
564 if (dev_priv
->fbc
.plane
== intel_crtc
->plane
&&
565 dev_priv
->fbc
.fb_id
== fb
->base
.id
&&
566 dev_priv
->fbc
.y
== crtc
->y
)
569 if (intel_fbc_enabled(dev
)) {
570 /* We update FBC along two paths, after changing fb/crtc
571 * configuration (modeswitching) and after page-flipping
572 * finishes. For the latter, we know that not only did
573 * we disable the FBC at the start of the page-flip
574 * sequence, but also more than one vblank has passed.
576 * For the former case of modeswitching, it is possible
577 * to switch between two FBC valid configurations
578 * instantaneously so we do need to disable the FBC
579 * before we can modify its control registers. We also
580 * have to wait for the next vblank for that to take
581 * effect. However, since we delay enabling FBC we can
582 * assume that a vblank has passed since disabling and
583 * that we can safely alter the registers in the deferred
586 * In the scenario that we go from a valid to invalid
587 * and then back to valid FBC configuration we have
588 * no strict enforcement that a vblank occurred since
589 * disabling the FBC. However, along all current pipe
590 * disabling paths we do need to wait for a vblank at
591 * some point. And we wait before enabling FBC anyway.
593 DRM_DEBUG_KMS("disabling active FBC for update\n");
594 intel_disable_fbc(dev
);
597 intel_enable_fbc(crtc
, 500);
598 dev_priv
->fbc
.no_fbc_reason
= FBC_OK
;
602 /* Multiple disables should be harmless */
603 if (intel_fbc_enabled(dev
)) {
604 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
605 intel_disable_fbc(dev
);
607 i915_gem_stolen_cleanup_compression(dev
);
610 static void i915_pineview_get_mem_freq(struct drm_device
*dev
)
612 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
615 tmp
= I915_READ(CLKCFG
);
617 switch (tmp
& CLKCFG_FSB_MASK
) {
619 dev_priv
->fsb_freq
= 533; /* 133*4 */
622 dev_priv
->fsb_freq
= 800; /* 200*4 */
625 dev_priv
->fsb_freq
= 667; /* 167*4 */
628 dev_priv
->fsb_freq
= 400; /* 100*4 */
632 switch (tmp
& CLKCFG_MEM_MASK
) {
634 dev_priv
->mem_freq
= 533;
637 dev_priv
->mem_freq
= 667;
640 dev_priv
->mem_freq
= 800;
644 /* detect pineview DDR3 setting */
645 tmp
= I915_READ(CSHRDDR3CTL
);
646 dev_priv
->is_ddr3
= (tmp
& CSHRDDR3CTL_DDR3
) ? 1 : 0;
649 static void i915_ironlake_get_mem_freq(struct drm_device
*dev
)
651 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
654 ddrpll
= I915_READ16(DDRMPLL1
);
655 csipll
= I915_READ16(CSIPLL0
);
657 switch (ddrpll
& 0xff) {
659 dev_priv
->mem_freq
= 800;
662 dev_priv
->mem_freq
= 1066;
665 dev_priv
->mem_freq
= 1333;
668 dev_priv
->mem_freq
= 1600;
671 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
673 dev_priv
->mem_freq
= 0;
677 dev_priv
->ips
.r_t
= dev_priv
->mem_freq
;
679 switch (csipll
& 0x3ff) {
681 dev_priv
->fsb_freq
= 3200;
684 dev_priv
->fsb_freq
= 3733;
687 dev_priv
->fsb_freq
= 4266;
690 dev_priv
->fsb_freq
= 4800;
693 dev_priv
->fsb_freq
= 5333;
696 dev_priv
->fsb_freq
= 5866;
699 dev_priv
->fsb_freq
= 6400;
702 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
704 dev_priv
->fsb_freq
= 0;
708 if (dev_priv
->fsb_freq
== 3200) {
709 dev_priv
->ips
.c_m
= 0;
710 } else if (dev_priv
->fsb_freq
> 3200 && dev_priv
->fsb_freq
<= 4800) {
711 dev_priv
->ips
.c_m
= 1;
713 dev_priv
->ips
.c_m
= 2;
717 static const struct cxsr_latency cxsr_latency_table
[] = {
718 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
719 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
720 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
721 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
722 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
724 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
725 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
726 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
727 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
728 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
730 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
731 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
732 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
733 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
734 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
736 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
737 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
738 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
739 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
740 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
742 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
743 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
744 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
745 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
746 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
748 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
749 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
750 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
751 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
752 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
755 static const struct cxsr_latency
*intel_get_cxsr_latency(int is_desktop
,
760 const struct cxsr_latency
*latency
;
763 if (fsb
== 0 || mem
== 0)
766 for (i
= 0; i
< ARRAY_SIZE(cxsr_latency_table
); i
++) {
767 latency
= &cxsr_latency_table
[i
];
768 if (is_desktop
== latency
->is_desktop
&&
769 is_ddr3
== latency
->is_ddr3
&&
770 fsb
== latency
->fsb_freq
&& mem
== latency
->mem_freq
)
774 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
779 static void pineview_disable_cxsr(struct drm_device
*dev
)
781 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
783 /* deactivate cxsr */
784 I915_WRITE(DSPFW3
, I915_READ(DSPFW3
) & ~PINEVIEW_SELF_REFRESH_EN
);
788 * Latency for FIFO fetches is dependent on several factors:
789 * - memory configuration (speed, channels)
791 * - current MCH state
792 * It can be fairly high in some situations, so here we assume a fairly
793 * pessimal value. It's a tradeoff between extra memory fetches (if we
794 * set this value too high, the FIFO will fetch frequently to stay full)
795 * and power consumption (set it too low to save power and we might see
796 * FIFO underruns and display "flicker").
798 * A value of 5us seems to be a good balance; safe for very low end
799 * platforms but not overly aggressive on lower latency configs.
801 static const int latency_ns
= 5000;
803 static int i9xx_get_fifo_size(struct drm_device
*dev
, int plane
)
805 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
806 uint32_t dsparb
= I915_READ(DSPARB
);
809 size
= dsparb
& 0x7f;
811 size
= ((dsparb
>> DSPARB_CSTART_SHIFT
) & 0x7f) - size
;
813 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
814 plane
? "B" : "A", size
);
819 static int i85x_get_fifo_size(struct drm_device
*dev
, int plane
)
821 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
822 uint32_t dsparb
= I915_READ(DSPARB
);
825 size
= dsparb
& 0x1ff;
827 size
= ((dsparb
>> DSPARB_BEND_SHIFT
) & 0x1ff) - size
;
828 size
>>= 1; /* Convert to cachelines */
830 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
831 plane
? "B" : "A", size
);
836 static int i845_get_fifo_size(struct drm_device
*dev
, int plane
)
838 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
839 uint32_t dsparb
= I915_READ(DSPARB
);
842 size
= dsparb
& 0x7f;
843 size
>>= 2; /* Convert to cachelines */
845 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
852 static int i830_get_fifo_size(struct drm_device
*dev
, int plane
)
854 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
855 uint32_t dsparb
= I915_READ(DSPARB
);
858 size
= dsparb
& 0x7f;
859 size
>>= 1; /* Convert to cachelines */
861 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
862 plane
? "B" : "A", size
);
867 /* Pineview has different values for various configs */
868 static const struct intel_watermark_params pineview_display_wm
= {
869 PINEVIEW_DISPLAY_FIFO
,
873 PINEVIEW_FIFO_LINE_SIZE
875 static const struct intel_watermark_params pineview_display_hplloff_wm
= {
876 PINEVIEW_DISPLAY_FIFO
,
878 PINEVIEW_DFT_HPLLOFF_WM
,
880 PINEVIEW_FIFO_LINE_SIZE
882 static const struct intel_watermark_params pineview_cursor_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 pineview_cursor_hplloff_wm
= {
890 PINEVIEW_CURSOR_FIFO
,
891 PINEVIEW_CURSOR_MAX_WM
,
892 PINEVIEW_CURSOR_DFT_WM
,
893 PINEVIEW_CURSOR_GUARD_WM
,
894 PINEVIEW_FIFO_LINE_SIZE
896 static const struct intel_watermark_params g4x_wm_info
= {
903 static const struct intel_watermark_params g4x_cursor_wm_info
= {
910 static const struct intel_watermark_params valleyview_wm_info
= {
911 VALLEYVIEW_FIFO_SIZE
,
917 static const struct intel_watermark_params valleyview_cursor_wm_info
= {
919 VALLEYVIEW_CURSOR_MAX_WM
,
924 static const struct intel_watermark_params i965_cursor_wm_info
= {
931 static const struct intel_watermark_params i945_wm_info
= {
938 static const struct intel_watermark_params i915_wm_info
= {
945 static const struct intel_watermark_params i855_wm_info
= {
952 static const struct intel_watermark_params i830_wm_info
= {
960 static const struct intel_watermark_params ironlake_display_wm_info
= {
967 static const struct intel_watermark_params ironlake_cursor_wm_info
= {
974 static const struct intel_watermark_params ironlake_display_srwm_info
= {
976 ILK_DISPLAY_MAX_SRWM
,
977 ILK_DISPLAY_DFT_SRWM
,
981 static const struct intel_watermark_params ironlake_cursor_srwm_info
= {
989 static const struct intel_watermark_params sandybridge_display_wm_info
= {
996 static const struct intel_watermark_params sandybridge_cursor_wm_info
= {
1003 static const struct intel_watermark_params sandybridge_display_srwm_info
= {
1004 SNB_DISPLAY_SR_FIFO
,
1005 SNB_DISPLAY_MAX_SRWM
,
1006 SNB_DISPLAY_DFT_SRWM
,
1010 static const struct intel_watermark_params sandybridge_cursor_srwm_info
= {
1012 SNB_CURSOR_MAX_SRWM
,
1013 SNB_CURSOR_DFT_SRWM
,
1020 * intel_calculate_wm - calculate watermark level
1021 * @clock_in_khz: pixel clock
1022 * @wm: chip FIFO params
1023 * @pixel_size: display pixel size
1024 * @latency_ns: memory latency for the platform
1026 * Calculate the watermark level (the level at which the display plane will
1027 * start fetching from memory again). Each chip has a different display
1028 * FIFO size and allocation, so the caller needs to figure that out and pass
1029 * in the correct intel_watermark_params structure.
1031 * As the pixel clock runs, the FIFO will be drained at a rate that depends
1032 * on the pixel size. When it reaches the watermark level, it'll start
1033 * fetching FIFO line sized based chunks from memory until the FIFO fills
1034 * past the watermark point. If the FIFO drains completely, a FIFO underrun
1035 * will occur, and a display engine hang could result.
1037 static unsigned long intel_calculate_wm(unsigned long clock_in_khz
,
1038 const struct intel_watermark_params
*wm
,
1041 unsigned long latency_ns
)
1043 long entries_required
, wm_size
;
1046 * Note: we need to make sure we don't overflow for various clock &
1048 * clocks go from a few thousand to several hundred thousand.
1049 * latency is usually a few thousand
1051 entries_required
= ((clock_in_khz
/ 1000) * pixel_size
* latency_ns
) /
1053 entries_required
= DIV_ROUND_UP(entries_required
, wm
->cacheline_size
);
1055 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required
);
1057 wm_size
= fifo_size
- (entries_required
+ wm
->guard_size
);
1059 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size
);
1061 /* Don't promote wm_size to unsigned... */
1062 if (wm_size
> (long)wm
->max_wm
)
1063 wm_size
= wm
->max_wm
;
1065 wm_size
= wm
->default_wm
;
1069 static struct drm_crtc
*single_enabled_crtc(struct drm_device
*dev
)
1071 struct drm_crtc
*crtc
, *enabled
= NULL
;
1073 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1074 if (intel_crtc_active(crtc
)) {
1084 static void pineview_update_wm(struct drm_crtc
*unused_crtc
)
1086 struct drm_device
*dev
= unused_crtc
->dev
;
1087 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1088 struct drm_crtc
*crtc
;
1089 const struct cxsr_latency
*latency
;
1093 latency
= intel_get_cxsr_latency(IS_PINEVIEW_G(dev
), dev_priv
->is_ddr3
,
1094 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
1096 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1097 pineview_disable_cxsr(dev
);
1101 crtc
= single_enabled_crtc(dev
);
1103 const struct drm_display_mode
*adjusted_mode
;
1104 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1107 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1108 clock
= adjusted_mode
->crtc_clock
;
1111 wm
= intel_calculate_wm(clock
, &pineview_display_wm
,
1112 pineview_display_wm
.fifo_size
,
1113 pixel_size
, latency
->display_sr
);
1114 reg
= I915_READ(DSPFW1
);
1115 reg
&= ~DSPFW_SR_MASK
;
1116 reg
|= wm
<< DSPFW_SR_SHIFT
;
1117 I915_WRITE(DSPFW1
, reg
);
1118 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg
);
1121 wm
= intel_calculate_wm(clock
, &pineview_cursor_wm
,
1122 pineview_display_wm
.fifo_size
,
1123 pixel_size
, latency
->cursor_sr
);
1124 reg
= I915_READ(DSPFW3
);
1125 reg
&= ~DSPFW_CURSOR_SR_MASK
;
1126 reg
|= (wm
& 0x3f) << DSPFW_CURSOR_SR_SHIFT
;
1127 I915_WRITE(DSPFW3
, reg
);
1129 /* Display HPLL off SR */
1130 wm
= intel_calculate_wm(clock
, &pineview_display_hplloff_wm
,
1131 pineview_display_hplloff_wm
.fifo_size
,
1132 pixel_size
, latency
->display_hpll_disable
);
1133 reg
= I915_READ(DSPFW3
);
1134 reg
&= ~DSPFW_HPLL_SR_MASK
;
1135 reg
|= wm
& DSPFW_HPLL_SR_MASK
;
1136 I915_WRITE(DSPFW3
, reg
);
1138 /* cursor HPLL off SR */
1139 wm
= intel_calculate_wm(clock
, &pineview_cursor_hplloff_wm
,
1140 pineview_display_hplloff_wm
.fifo_size
,
1141 pixel_size
, latency
->cursor_hpll_disable
);
1142 reg
= I915_READ(DSPFW3
);
1143 reg
&= ~DSPFW_HPLL_CURSOR_MASK
;
1144 reg
|= (wm
& 0x3f) << DSPFW_HPLL_CURSOR_SHIFT
;
1145 I915_WRITE(DSPFW3
, reg
);
1146 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg
);
1150 I915_READ(DSPFW3
) | PINEVIEW_SELF_REFRESH_EN
);
1151 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1153 pineview_disable_cxsr(dev
);
1154 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1158 static bool g4x_compute_wm0(struct drm_device
*dev
,
1160 const struct intel_watermark_params
*display
,
1161 int display_latency_ns
,
1162 const struct intel_watermark_params
*cursor
,
1163 int cursor_latency_ns
,
1167 struct drm_crtc
*crtc
;
1168 const struct drm_display_mode
*adjusted_mode
;
1169 int htotal
, hdisplay
, clock
, pixel_size
;
1170 int line_time_us
, line_count
;
1171 int entries
, tlb_miss
;
1173 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1174 if (!intel_crtc_active(crtc
)) {
1175 *cursor_wm
= cursor
->guard_size
;
1176 *plane_wm
= display
->guard_size
;
1180 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1181 clock
= adjusted_mode
->crtc_clock
;
1182 htotal
= adjusted_mode
->htotal
;
1183 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1184 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1186 /* Use the small buffer method to calculate plane watermark */
1187 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
1188 tlb_miss
= display
->fifo_size
*display
->cacheline_size
- hdisplay
* 8;
1190 entries
+= tlb_miss
;
1191 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
1192 *plane_wm
= entries
+ display
->guard_size
;
1193 if (*plane_wm
> (int)display
->max_wm
)
1194 *plane_wm
= display
->max_wm
;
1196 /* Use the large buffer method to calculate cursor watermark */
1197 line_time_us
= ((htotal
* 1000) / clock
);
1198 line_count
= (cursor_latency_ns
/ line_time_us
+ 1000) / 1000;
1199 entries
= line_count
* 64 * pixel_size
;
1200 tlb_miss
= cursor
->fifo_size
*cursor
->cacheline_size
- hdisplay
* 8;
1202 entries
+= tlb_miss
;
1203 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1204 *cursor_wm
= entries
+ cursor
->guard_size
;
1205 if (*cursor_wm
> (int)cursor
->max_wm
)
1206 *cursor_wm
= (int)cursor
->max_wm
;
1212 * Check the wm result.
1214 * If any calculated watermark values is larger than the maximum value that
1215 * can be programmed into the associated watermark register, that watermark
1218 static bool g4x_check_srwm(struct drm_device
*dev
,
1219 int display_wm
, int cursor_wm
,
1220 const struct intel_watermark_params
*display
,
1221 const struct intel_watermark_params
*cursor
)
1223 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1224 display_wm
, cursor_wm
);
1226 if (display_wm
> display
->max_wm
) {
1227 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1228 display_wm
, display
->max_wm
);
1232 if (cursor_wm
> cursor
->max_wm
) {
1233 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1234 cursor_wm
, cursor
->max_wm
);
1238 if (!(display_wm
|| cursor_wm
)) {
1239 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1246 static bool g4x_compute_srwm(struct drm_device
*dev
,
1249 const struct intel_watermark_params
*display
,
1250 const struct intel_watermark_params
*cursor
,
1251 int *display_wm
, int *cursor_wm
)
1253 struct drm_crtc
*crtc
;
1254 const struct drm_display_mode
*adjusted_mode
;
1255 int hdisplay
, htotal
, pixel_size
, clock
;
1256 unsigned long line_time_us
;
1257 int line_count
, line_size
;
1262 *display_wm
= *cursor_wm
= 0;
1266 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1267 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1268 clock
= adjusted_mode
->crtc_clock
;
1269 htotal
= adjusted_mode
->htotal
;
1270 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1271 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1273 line_time_us
= (htotal
* 1000) / clock
;
1274 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1275 line_size
= hdisplay
* pixel_size
;
1277 /* Use the minimum of the small and large buffer method for primary */
1278 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1279 large
= line_count
* line_size
;
1281 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1282 *display_wm
= entries
+ display
->guard_size
;
1284 /* calculate the self-refresh watermark for display cursor */
1285 entries
= line_count
* pixel_size
* 64;
1286 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1287 *cursor_wm
= entries
+ cursor
->guard_size
;
1289 return g4x_check_srwm(dev
,
1290 *display_wm
, *cursor_wm
,
1294 static bool vlv_compute_drain_latency(struct drm_device
*dev
,
1296 int *plane_prec_mult
,
1298 int *cursor_prec_mult
,
1301 struct drm_crtc
*crtc
;
1302 int clock
, pixel_size
;
1305 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1306 if (!intel_crtc_active(crtc
))
1309 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
1310 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8; /* BPP */
1312 entries
= (clock
/ 1000) * pixel_size
;
1313 *plane_prec_mult
= (entries
> 256) ?
1314 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1315 *plane_dl
= (64 * (*plane_prec_mult
) * 4) / ((clock
/ 1000) *
1318 entries
= (clock
/ 1000) * 4; /* BPP is always 4 for cursor */
1319 *cursor_prec_mult
= (entries
> 256) ?
1320 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1321 *cursor_dl
= (64 * (*cursor_prec_mult
) * 4) / ((clock
/ 1000) * 4);
1327 * Update drain latency registers of memory arbiter
1329 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1330 * to be programmed. Each plane has a drain latency multiplier and a drain
1334 static void vlv_update_drain_latency(struct drm_device
*dev
)
1336 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1337 int planea_prec
, planea_dl
, planeb_prec
, planeb_dl
;
1338 int cursora_prec
, cursora_dl
, cursorb_prec
, cursorb_dl
;
1339 int plane_prec_mult
, cursor_prec_mult
; /* Precision multiplier is
1342 /* For plane A, Cursor A */
1343 if (vlv_compute_drain_latency(dev
, 0, &plane_prec_mult
, &planea_dl
,
1344 &cursor_prec_mult
, &cursora_dl
)) {
1345 cursora_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1346 DDL_CURSORA_PRECISION_32
: DDL_CURSORA_PRECISION_16
;
1347 planea_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1348 DDL_PLANEA_PRECISION_32
: DDL_PLANEA_PRECISION_16
;
1350 I915_WRITE(VLV_DDL1
, cursora_prec
|
1351 (cursora_dl
<< DDL_CURSORA_SHIFT
) |
1352 planea_prec
| planea_dl
);
1355 /* For plane B, Cursor B */
1356 if (vlv_compute_drain_latency(dev
, 1, &plane_prec_mult
, &planeb_dl
,
1357 &cursor_prec_mult
, &cursorb_dl
)) {
1358 cursorb_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1359 DDL_CURSORB_PRECISION_32
: DDL_CURSORB_PRECISION_16
;
1360 planeb_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1361 DDL_PLANEB_PRECISION_32
: DDL_PLANEB_PRECISION_16
;
1363 I915_WRITE(VLV_DDL2
, cursorb_prec
|
1364 (cursorb_dl
<< DDL_CURSORB_SHIFT
) |
1365 planeb_prec
| planeb_dl
);
1369 #define single_plane_enabled(mask) is_power_of_2(mask)
1371 static void valleyview_update_wm(struct drm_crtc
*crtc
)
1373 struct drm_device
*dev
= crtc
->dev
;
1374 static const int sr_latency_ns
= 12000;
1375 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1376 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1377 int plane_sr
, cursor_sr
;
1378 int ignore_plane_sr
, ignore_cursor_sr
;
1379 unsigned int enabled
= 0;
1381 vlv_update_drain_latency(dev
);
1383 if (g4x_compute_wm0(dev
, PIPE_A
,
1384 &valleyview_wm_info
, latency_ns
,
1385 &valleyview_cursor_wm_info
, latency_ns
,
1386 &planea_wm
, &cursora_wm
))
1387 enabled
|= 1 << PIPE_A
;
1389 if (g4x_compute_wm0(dev
, PIPE_B
,
1390 &valleyview_wm_info
, latency_ns
,
1391 &valleyview_cursor_wm_info
, latency_ns
,
1392 &planeb_wm
, &cursorb_wm
))
1393 enabled
|= 1 << PIPE_B
;
1395 if (single_plane_enabled(enabled
) &&
1396 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1398 &valleyview_wm_info
,
1399 &valleyview_cursor_wm_info
,
1400 &plane_sr
, &ignore_cursor_sr
) &&
1401 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1403 &valleyview_wm_info
,
1404 &valleyview_cursor_wm_info
,
1405 &ignore_plane_sr
, &cursor_sr
)) {
1406 I915_WRITE(FW_BLC_SELF_VLV
, FW_CSPWRDWNEN
);
1408 I915_WRITE(FW_BLC_SELF_VLV
,
1409 I915_READ(FW_BLC_SELF_VLV
) & ~FW_CSPWRDWNEN
);
1410 plane_sr
= cursor_sr
= 0;
1413 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1414 planea_wm
, cursora_wm
,
1415 planeb_wm
, cursorb_wm
,
1416 plane_sr
, cursor_sr
);
1419 (plane_sr
<< DSPFW_SR_SHIFT
) |
1420 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1421 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1424 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1425 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1427 (I915_READ(DSPFW3
) & ~DSPFW_CURSOR_SR_MASK
) |
1428 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1431 static void g4x_update_wm(struct drm_crtc
*crtc
)
1433 struct drm_device
*dev
= crtc
->dev
;
1434 static const int sr_latency_ns
= 12000;
1435 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1436 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1437 int plane_sr
, cursor_sr
;
1438 unsigned int enabled
= 0;
1440 if (g4x_compute_wm0(dev
, PIPE_A
,
1441 &g4x_wm_info
, latency_ns
,
1442 &g4x_cursor_wm_info
, latency_ns
,
1443 &planea_wm
, &cursora_wm
))
1444 enabled
|= 1 << PIPE_A
;
1446 if (g4x_compute_wm0(dev
, PIPE_B
,
1447 &g4x_wm_info
, latency_ns
,
1448 &g4x_cursor_wm_info
, latency_ns
,
1449 &planeb_wm
, &cursorb_wm
))
1450 enabled
|= 1 << PIPE_B
;
1452 if (single_plane_enabled(enabled
) &&
1453 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1456 &g4x_cursor_wm_info
,
1457 &plane_sr
, &cursor_sr
)) {
1458 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1460 I915_WRITE(FW_BLC_SELF
,
1461 I915_READ(FW_BLC_SELF
) & ~FW_BLC_SELF_EN
);
1462 plane_sr
= cursor_sr
= 0;
1465 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1466 planea_wm
, cursora_wm
,
1467 planeb_wm
, cursorb_wm
,
1468 plane_sr
, cursor_sr
);
1471 (plane_sr
<< DSPFW_SR_SHIFT
) |
1472 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1473 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1476 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1477 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1478 /* HPLL off in SR has some issues on G4x... disable it */
1480 (I915_READ(DSPFW3
) & ~(DSPFW_HPLL_SR_EN
| DSPFW_CURSOR_SR_MASK
)) |
1481 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1484 static void i965_update_wm(struct drm_crtc
*unused_crtc
)
1486 struct drm_device
*dev
= unused_crtc
->dev
;
1487 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1488 struct drm_crtc
*crtc
;
1492 /* Calc sr entries for one plane configs */
1493 crtc
= single_enabled_crtc(dev
);
1495 /* self-refresh has much higher latency */
1496 static const int sr_latency_ns
= 12000;
1497 const struct drm_display_mode
*adjusted_mode
=
1498 &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1499 int clock
= adjusted_mode
->crtc_clock
;
1500 int htotal
= adjusted_mode
->htotal
;
1501 int hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1502 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1503 unsigned long line_time_us
;
1506 line_time_us
= ((htotal
* 1000) / clock
);
1508 /* Use ns/us then divide to preserve precision */
1509 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1510 pixel_size
* hdisplay
;
1511 entries
= DIV_ROUND_UP(entries
, I915_FIFO_LINE_SIZE
);
1512 srwm
= I965_FIFO_SIZE
- entries
;
1516 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1519 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1521 entries
= DIV_ROUND_UP(entries
,
1522 i965_cursor_wm_info
.cacheline_size
);
1523 cursor_sr
= i965_cursor_wm_info
.fifo_size
-
1524 (entries
+ i965_cursor_wm_info
.guard_size
);
1526 if (cursor_sr
> i965_cursor_wm_info
.max_wm
)
1527 cursor_sr
= i965_cursor_wm_info
.max_wm
;
1529 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1530 "cursor %d\n", srwm
, cursor_sr
);
1532 if (IS_CRESTLINE(dev
))
1533 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1535 /* Turn off self refresh if both pipes are enabled */
1536 if (IS_CRESTLINE(dev
))
1537 I915_WRITE(FW_BLC_SELF
, I915_READ(FW_BLC_SELF
)
1541 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1544 /* 965 has limitations... */
1545 I915_WRITE(DSPFW1
, (srwm
<< DSPFW_SR_SHIFT
) |
1546 (8 << 16) | (8 << 8) | (8 << 0));
1547 I915_WRITE(DSPFW2
, (8 << 8) | (8 << 0));
1548 /* update cursor SR watermark */
1549 I915_WRITE(DSPFW3
, (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1552 static void i9xx_update_wm(struct drm_crtc
*unused_crtc
)
1554 struct drm_device
*dev
= unused_crtc
->dev
;
1555 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1556 const struct intel_watermark_params
*wm_info
;
1561 int planea_wm
, planeb_wm
;
1562 struct drm_crtc
*crtc
, *enabled
= NULL
;
1565 wm_info
= &i945_wm_info
;
1566 else if (!IS_GEN2(dev
))
1567 wm_info
= &i915_wm_info
;
1569 wm_info
= &i855_wm_info
;
1571 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 0);
1572 crtc
= intel_get_crtc_for_plane(dev
, 0);
1573 if (intel_crtc_active(crtc
)) {
1574 const struct drm_display_mode
*adjusted_mode
;
1575 int cpp
= crtc
->fb
->bits_per_pixel
/ 8;
1579 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1580 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1581 wm_info
, fifo_size
, cpp
,
1585 planea_wm
= fifo_size
- wm_info
->guard_size
;
1587 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 1);
1588 crtc
= intel_get_crtc_for_plane(dev
, 1);
1589 if (intel_crtc_active(crtc
)) {
1590 const struct drm_display_mode
*adjusted_mode
;
1591 int cpp
= crtc
->fb
->bits_per_pixel
/ 8;
1595 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1596 planeb_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1597 wm_info
, fifo_size
, cpp
,
1599 if (enabled
== NULL
)
1604 planeb_wm
= fifo_size
- wm_info
->guard_size
;
1606 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm
, planeb_wm
);
1609 * Overlay gets an aggressive default since video jitter is bad.
1613 /* Play safe and disable self-refresh before adjusting watermarks. */
1614 if (IS_I945G(dev
) || IS_I945GM(dev
))
1615 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN_MASK
| 0);
1616 else if (IS_I915GM(dev
))
1617 I915_WRITE(INSTPM
, I915_READ(INSTPM
) & ~INSTPM_SELF_EN
);
1619 /* Calc sr entries for one plane configs */
1620 if (HAS_FW_BLC(dev
) && enabled
) {
1621 /* self-refresh has much higher latency */
1622 static const int sr_latency_ns
= 6000;
1623 const struct drm_display_mode
*adjusted_mode
=
1624 &to_intel_crtc(enabled
)->config
.adjusted_mode
;
1625 int clock
= adjusted_mode
->crtc_clock
;
1626 int htotal
= adjusted_mode
->htotal
;
1627 int hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1628 int pixel_size
= enabled
->fb
->bits_per_pixel
/ 8;
1629 unsigned long line_time_us
;
1632 line_time_us
= (htotal
* 1000) / clock
;
1634 /* Use ns/us then divide to preserve precision */
1635 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1636 pixel_size
* hdisplay
;
1637 entries
= DIV_ROUND_UP(entries
, wm_info
->cacheline_size
);
1638 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries
);
1639 srwm
= wm_info
->fifo_size
- entries
;
1643 if (IS_I945G(dev
) || IS_I945GM(dev
))
1644 I915_WRITE(FW_BLC_SELF
,
1645 FW_BLC_SELF_FIFO_MASK
| (srwm
& 0xff));
1646 else if (IS_I915GM(dev
))
1647 I915_WRITE(FW_BLC_SELF
, srwm
& 0x3f);
1650 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1651 planea_wm
, planeb_wm
, cwm
, srwm
);
1653 fwater_lo
= ((planeb_wm
& 0x3f) << 16) | (planea_wm
& 0x3f);
1654 fwater_hi
= (cwm
& 0x1f);
1656 /* Set request length to 8 cachelines per fetch */
1657 fwater_lo
= fwater_lo
| (1 << 24) | (1 << 8);
1658 fwater_hi
= fwater_hi
| (1 << 8);
1660 I915_WRITE(FW_BLC
, fwater_lo
);
1661 I915_WRITE(FW_BLC2
, fwater_hi
);
1663 if (HAS_FW_BLC(dev
)) {
1665 if (IS_I945G(dev
) || IS_I945GM(dev
))
1666 I915_WRITE(FW_BLC_SELF
,
1667 FW_BLC_SELF_EN_MASK
| FW_BLC_SELF_EN
);
1668 else if (IS_I915GM(dev
))
1669 I915_WRITE(INSTPM
, I915_READ(INSTPM
) | INSTPM_SELF_EN
);
1670 DRM_DEBUG_KMS("memory self refresh enabled\n");
1672 DRM_DEBUG_KMS("memory self refresh disabled\n");
1676 static void i830_update_wm(struct drm_crtc
*unused_crtc
)
1678 struct drm_device
*dev
= unused_crtc
->dev
;
1679 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1680 struct drm_crtc
*crtc
;
1681 const struct drm_display_mode
*adjusted_mode
;
1685 crtc
= single_enabled_crtc(dev
);
1689 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1690 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1692 dev_priv
->display
.get_fifo_size(dev
, 0),
1694 fwater_lo
= I915_READ(FW_BLC
) & ~0xfff;
1695 fwater_lo
|= (3<<8) | planea_wm
;
1697 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm
);
1699 I915_WRITE(FW_BLC
, fwater_lo
);
1703 * Check the wm result.
1705 * If any calculated watermark values is larger than the maximum value that
1706 * can be programmed into the associated watermark register, that watermark
1709 static bool ironlake_check_srwm(struct drm_device
*dev
, int level
,
1710 int fbc_wm
, int display_wm
, int cursor_wm
,
1711 const struct intel_watermark_params
*display
,
1712 const struct intel_watermark_params
*cursor
)
1714 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1716 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1717 " cursor %d\n", level
, display_wm
, fbc_wm
, cursor_wm
);
1719 if (fbc_wm
> SNB_FBC_MAX_SRWM
) {
1720 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1721 fbc_wm
, SNB_FBC_MAX_SRWM
, level
);
1723 /* fbc has it's own way to disable FBC WM */
1724 I915_WRITE(DISP_ARB_CTL
,
1725 I915_READ(DISP_ARB_CTL
) | DISP_FBC_WM_DIS
);
1727 } else if (INTEL_INFO(dev
)->gen
>= 6) {
1728 /* enable FBC WM (except on ILK, where it must remain off) */
1729 I915_WRITE(DISP_ARB_CTL
,
1730 I915_READ(DISP_ARB_CTL
) & ~DISP_FBC_WM_DIS
);
1733 if (display_wm
> display
->max_wm
) {
1734 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1735 display_wm
, SNB_DISPLAY_MAX_SRWM
, level
);
1739 if (cursor_wm
> cursor
->max_wm
) {
1740 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1741 cursor_wm
, SNB_CURSOR_MAX_SRWM
, level
);
1745 if (!(fbc_wm
|| display_wm
|| cursor_wm
)) {
1746 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level
, level
);
1754 * Compute watermark values of WM[1-3],
1756 static bool ironlake_compute_srwm(struct drm_device
*dev
, int level
, int plane
,
1758 const struct intel_watermark_params
*display
,
1759 const struct intel_watermark_params
*cursor
,
1760 int *fbc_wm
, int *display_wm
, int *cursor_wm
)
1762 struct drm_crtc
*crtc
;
1763 const struct drm_display_mode
*adjusted_mode
;
1764 unsigned long line_time_us
;
1765 int hdisplay
, htotal
, pixel_size
, clock
;
1766 int line_count
, line_size
;
1771 *fbc_wm
= *display_wm
= *cursor_wm
= 0;
1775 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1776 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1777 clock
= adjusted_mode
->crtc_clock
;
1778 htotal
= adjusted_mode
->htotal
;
1779 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1780 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1782 line_time_us
= (htotal
* 1000) / clock
;
1783 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1784 line_size
= hdisplay
* pixel_size
;
1786 /* Use the minimum of the small and large buffer method for primary */
1787 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1788 large
= line_count
* line_size
;
1790 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1791 *display_wm
= entries
+ display
->guard_size
;
1795 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1797 *fbc_wm
= DIV_ROUND_UP(*display_wm
* 64, line_size
) + 2;
1799 /* calculate the self-refresh watermark for display cursor */
1800 entries
= line_count
* pixel_size
* 64;
1801 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1802 *cursor_wm
= entries
+ cursor
->guard_size
;
1804 return ironlake_check_srwm(dev
, level
,
1805 *fbc_wm
, *display_wm
, *cursor_wm
,
1809 static void ironlake_update_wm(struct drm_crtc
*crtc
)
1811 struct drm_device
*dev
= crtc
->dev
;
1812 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1813 int fbc_wm
, plane_wm
, cursor_wm
;
1814 unsigned int enabled
;
1817 if (g4x_compute_wm0(dev
, PIPE_A
,
1818 &ironlake_display_wm_info
,
1819 dev_priv
->wm
.pri_latency
[0] * 100,
1820 &ironlake_cursor_wm_info
,
1821 dev_priv
->wm
.cur_latency
[0] * 100,
1822 &plane_wm
, &cursor_wm
)) {
1823 I915_WRITE(WM0_PIPEA_ILK
,
1824 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1825 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1826 " plane %d, " "cursor: %d\n",
1827 plane_wm
, cursor_wm
);
1828 enabled
|= 1 << PIPE_A
;
1831 if (g4x_compute_wm0(dev
, PIPE_B
,
1832 &ironlake_display_wm_info
,
1833 dev_priv
->wm
.pri_latency
[0] * 100,
1834 &ironlake_cursor_wm_info
,
1835 dev_priv
->wm
.cur_latency
[0] * 100,
1836 &plane_wm
, &cursor_wm
)) {
1837 I915_WRITE(WM0_PIPEB_ILK
,
1838 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1839 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1840 " plane %d, cursor: %d\n",
1841 plane_wm
, cursor_wm
);
1842 enabled
|= 1 << PIPE_B
;
1846 * Calculate and update the self-refresh watermark only when one
1847 * display plane is used.
1849 I915_WRITE(WM3_LP_ILK
, 0);
1850 I915_WRITE(WM2_LP_ILK
, 0);
1851 I915_WRITE(WM1_LP_ILK
, 0);
1853 if (!single_plane_enabled(enabled
))
1855 enabled
= ffs(enabled
) - 1;
1858 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1859 dev_priv
->wm
.pri_latency
[1] * 500,
1860 &ironlake_display_srwm_info
,
1861 &ironlake_cursor_srwm_info
,
1862 &fbc_wm
, &plane_wm
, &cursor_wm
))
1865 I915_WRITE(WM1_LP_ILK
,
1867 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
1868 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1869 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1873 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1874 dev_priv
->wm
.pri_latency
[2] * 500,
1875 &ironlake_display_srwm_info
,
1876 &ironlake_cursor_srwm_info
,
1877 &fbc_wm
, &plane_wm
, &cursor_wm
))
1880 I915_WRITE(WM2_LP_ILK
,
1882 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
1883 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1884 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1888 * WM3 is unsupported on ILK, probably because we don't have latency
1889 * data for that power state
1893 static void sandybridge_update_wm(struct drm_crtc
*crtc
)
1895 struct drm_device
*dev
= crtc
->dev
;
1896 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1897 int latency
= dev_priv
->wm
.pri_latency
[0] * 100; /* In unit 0.1us */
1899 int fbc_wm
, plane_wm
, cursor_wm
;
1900 unsigned int enabled
;
1903 if (g4x_compute_wm0(dev
, PIPE_A
,
1904 &sandybridge_display_wm_info
, latency
,
1905 &sandybridge_cursor_wm_info
, latency
,
1906 &plane_wm
, &cursor_wm
)) {
1907 val
= I915_READ(WM0_PIPEA_ILK
);
1908 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1909 I915_WRITE(WM0_PIPEA_ILK
, val
|
1910 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1911 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1912 " plane %d, " "cursor: %d\n",
1913 plane_wm
, cursor_wm
);
1914 enabled
|= 1 << PIPE_A
;
1917 if (g4x_compute_wm0(dev
, PIPE_B
,
1918 &sandybridge_display_wm_info
, latency
,
1919 &sandybridge_cursor_wm_info
, latency
,
1920 &plane_wm
, &cursor_wm
)) {
1921 val
= I915_READ(WM0_PIPEB_ILK
);
1922 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1923 I915_WRITE(WM0_PIPEB_ILK
, val
|
1924 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1925 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1926 " plane %d, cursor: %d\n",
1927 plane_wm
, cursor_wm
);
1928 enabled
|= 1 << PIPE_B
;
1932 * Calculate and update the self-refresh watermark only when one
1933 * display plane is used.
1935 * SNB support 3 levels of watermark.
1937 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1938 * and disabled in the descending order
1941 I915_WRITE(WM3_LP_ILK
, 0);
1942 I915_WRITE(WM2_LP_ILK
, 0);
1943 I915_WRITE(WM1_LP_ILK
, 0);
1945 if (!single_plane_enabled(enabled
) ||
1946 dev_priv
->sprite_scaling_enabled
)
1948 enabled
= ffs(enabled
) - 1;
1951 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1952 dev_priv
->wm
.pri_latency
[1] * 500,
1953 &sandybridge_display_srwm_info
,
1954 &sandybridge_cursor_srwm_info
,
1955 &fbc_wm
, &plane_wm
, &cursor_wm
))
1958 I915_WRITE(WM1_LP_ILK
,
1960 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
1961 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1962 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1966 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1967 dev_priv
->wm
.pri_latency
[2] * 500,
1968 &sandybridge_display_srwm_info
,
1969 &sandybridge_cursor_srwm_info
,
1970 &fbc_wm
, &plane_wm
, &cursor_wm
))
1973 I915_WRITE(WM2_LP_ILK
,
1975 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
1976 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1977 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1981 if (!ironlake_compute_srwm(dev
, 3, enabled
,
1982 dev_priv
->wm
.pri_latency
[3] * 500,
1983 &sandybridge_display_srwm_info
,
1984 &sandybridge_cursor_srwm_info
,
1985 &fbc_wm
, &plane_wm
, &cursor_wm
))
1988 I915_WRITE(WM3_LP_ILK
,
1990 (dev_priv
->wm
.pri_latency
[3] << WM1_LP_LATENCY_SHIFT
) |
1991 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1992 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1996 static void ivybridge_update_wm(struct drm_crtc
*crtc
)
1998 struct drm_device
*dev
= crtc
->dev
;
1999 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2000 int latency
= dev_priv
->wm
.pri_latency
[0] * 100; /* In unit 0.1us */
2002 int fbc_wm
, plane_wm
, cursor_wm
;
2003 int ignore_fbc_wm
, ignore_plane_wm
, ignore_cursor_wm
;
2004 unsigned int enabled
;
2007 if (g4x_compute_wm0(dev
, PIPE_A
,
2008 &sandybridge_display_wm_info
, latency
,
2009 &sandybridge_cursor_wm_info
, latency
,
2010 &plane_wm
, &cursor_wm
)) {
2011 val
= I915_READ(WM0_PIPEA_ILK
);
2012 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2013 I915_WRITE(WM0_PIPEA_ILK
, val
|
2014 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2015 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
2016 " plane %d, " "cursor: %d\n",
2017 plane_wm
, cursor_wm
);
2018 enabled
|= 1 << PIPE_A
;
2021 if (g4x_compute_wm0(dev
, PIPE_B
,
2022 &sandybridge_display_wm_info
, latency
,
2023 &sandybridge_cursor_wm_info
, latency
,
2024 &plane_wm
, &cursor_wm
)) {
2025 val
= I915_READ(WM0_PIPEB_ILK
);
2026 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2027 I915_WRITE(WM0_PIPEB_ILK
, val
|
2028 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2029 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
2030 " plane %d, cursor: %d\n",
2031 plane_wm
, cursor_wm
);
2032 enabled
|= 1 << PIPE_B
;
2035 if (g4x_compute_wm0(dev
, PIPE_C
,
2036 &sandybridge_display_wm_info
, latency
,
2037 &sandybridge_cursor_wm_info
, latency
,
2038 &plane_wm
, &cursor_wm
)) {
2039 val
= I915_READ(WM0_PIPEC_IVB
);
2040 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2041 I915_WRITE(WM0_PIPEC_IVB
, val
|
2042 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2043 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
2044 " plane %d, cursor: %d\n",
2045 plane_wm
, cursor_wm
);
2046 enabled
|= 1 << PIPE_C
;
2050 * Calculate and update the self-refresh watermark only when one
2051 * display plane is used.
2053 * SNB support 3 levels of watermark.
2055 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
2056 * and disabled in the descending order
2059 I915_WRITE(WM3_LP_ILK
, 0);
2060 I915_WRITE(WM2_LP_ILK
, 0);
2061 I915_WRITE(WM1_LP_ILK
, 0);
2063 if (!single_plane_enabled(enabled
) ||
2064 dev_priv
->sprite_scaling_enabled
)
2066 enabled
= ffs(enabled
) - 1;
2069 if (!ironlake_compute_srwm(dev
, 1, enabled
,
2070 dev_priv
->wm
.pri_latency
[1] * 500,
2071 &sandybridge_display_srwm_info
,
2072 &sandybridge_cursor_srwm_info
,
2073 &fbc_wm
, &plane_wm
, &cursor_wm
))
2076 I915_WRITE(WM1_LP_ILK
,
2078 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
2079 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2080 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2084 if (!ironlake_compute_srwm(dev
, 2, enabled
,
2085 dev_priv
->wm
.pri_latency
[2] * 500,
2086 &sandybridge_display_srwm_info
,
2087 &sandybridge_cursor_srwm_info
,
2088 &fbc_wm
, &plane_wm
, &cursor_wm
))
2091 I915_WRITE(WM2_LP_ILK
,
2093 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
2094 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2095 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2098 /* WM3, note we have to correct the cursor latency */
2099 if (!ironlake_compute_srwm(dev
, 3, enabled
,
2100 dev_priv
->wm
.pri_latency
[3] * 500,
2101 &sandybridge_display_srwm_info
,
2102 &sandybridge_cursor_srwm_info
,
2103 &fbc_wm
, &plane_wm
, &ignore_cursor_wm
) ||
2104 !ironlake_compute_srwm(dev
, 3, enabled
,
2105 dev_priv
->wm
.cur_latency
[3] * 500,
2106 &sandybridge_display_srwm_info
,
2107 &sandybridge_cursor_srwm_info
,
2108 &ignore_fbc_wm
, &ignore_plane_wm
, &cursor_wm
))
2111 I915_WRITE(WM3_LP_ILK
,
2113 (dev_priv
->wm
.pri_latency
[3] << WM1_LP_LATENCY_SHIFT
) |
2114 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2115 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2119 static uint32_t ilk_pipe_pixel_rate(struct drm_device
*dev
,
2120 struct drm_crtc
*crtc
)
2122 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2123 uint32_t pixel_rate
;
2125 pixel_rate
= intel_crtc
->config
.adjusted_mode
.crtc_clock
;
2127 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
2128 * adjust the pixel_rate here. */
2130 if (intel_crtc
->config
.pch_pfit
.enabled
) {
2131 uint64_t pipe_w
, pipe_h
, pfit_w
, pfit_h
;
2132 uint32_t pfit_size
= intel_crtc
->config
.pch_pfit
.size
;
2134 pipe_w
= intel_crtc
->config
.pipe_src_w
;
2135 pipe_h
= intel_crtc
->config
.pipe_src_h
;
2136 pfit_w
= (pfit_size
>> 16) & 0xFFFF;
2137 pfit_h
= pfit_size
& 0xFFFF;
2138 if (pipe_w
< pfit_w
)
2140 if (pipe_h
< pfit_h
)
2143 pixel_rate
= div_u64((uint64_t) pixel_rate
* pipe_w
* pipe_h
,
2150 /* latency must be in 0.1us units. */
2151 static uint32_t ilk_wm_method1(uint32_t pixel_rate
, uint8_t bytes_per_pixel
,
2156 if (WARN(latency
== 0, "Latency value missing\n"))
2159 ret
= (uint64_t) pixel_rate
* bytes_per_pixel
* latency
;
2160 ret
= DIV_ROUND_UP_ULL(ret
, 64 * 10000) + 2;
2165 /* latency must be in 0.1us units. */
2166 static uint32_t ilk_wm_method2(uint32_t pixel_rate
, uint32_t pipe_htotal
,
2167 uint32_t horiz_pixels
, uint8_t bytes_per_pixel
,
2172 if (WARN(latency
== 0, "Latency value missing\n"))
2175 ret
= (latency
* pixel_rate
) / (pipe_htotal
* 10000);
2176 ret
= (ret
+ 1) * horiz_pixels
* bytes_per_pixel
;
2177 ret
= DIV_ROUND_UP(ret
, 64) + 2;
2181 static uint32_t ilk_wm_fbc(uint32_t pri_val
, uint32_t horiz_pixels
,
2182 uint8_t bytes_per_pixel
)
2184 return DIV_ROUND_UP(pri_val
* 64, horiz_pixels
* bytes_per_pixel
) + 2;
2187 struct hsw_pipe_wm_parameters
{
2189 uint32_t pipe_htotal
;
2190 uint32_t pixel_rate
;
2191 struct intel_plane_wm_parameters pri
;
2192 struct intel_plane_wm_parameters spr
;
2193 struct intel_plane_wm_parameters cur
;
2196 struct hsw_wm_maximums
{
2203 /* used in computing the new watermarks state */
2204 struct intel_wm_config
{
2205 unsigned int num_pipes_active
;
2206 bool sprites_enabled
;
2207 bool sprites_scaled
;
2211 * For both WM_PIPE and WM_LP.
2212 * mem_value must be in 0.1us units.
2214 static uint32_t ilk_compute_pri_wm(const struct hsw_pipe_wm_parameters
*params
,
2218 uint32_t method1
, method2
;
2220 if (!params
->active
|| !params
->pri
.enabled
)
2223 method1
= ilk_wm_method1(params
->pixel_rate
,
2224 params
->pri
.bytes_per_pixel
,
2230 method2
= ilk_wm_method2(params
->pixel_rate
,
2231 params
->pipe_htotal
,
2232 params
->pri
.horiz_pixels
,
2233 params
->pri
.bytes_per_pixel
,
2236 return min(method1
, method2
);
2240 * For both WM_PIPE and WM_LP.
2241 * mem_value must be in 0.1us units.
2243 static uint32_t ilk_compute_spr_wm(const struct hsw_pipe_wm_parameters
*params
,
2246 uint32_t method1
, method2
;
2248 if (!params
->active
|| !params
->spr
.enabled
)
2251 method1
= ilk_wm_method1(params
->pixel_rate
,
2252 params
->spr
.bytes_per_pixel
,
2254 method2
= ilk_wm_method2(params
->pixel_rate
,
2255 params
->pipe_htotal
,
2256 params
->spr
.horiz_pixels
,
2257 params
->spr
.bytes_per_pixel
,
2259 return min(method1
, method2
);
2263 * For both WM_PIPE and WM_LP.
2264 * mem_value must be in 0.1us units.
2266 static uint32_t ilk_compute_cur_wm(const struct hsw_pipe_wm_parameters
*params
,
2269 if (!params
->active
|| !params
->cur
.enabled
)
2272 return ilk_wm_method2(params
->pixel_rate
,
2273 params
->pipe_htotal
,
2274 params
->cur
.horiz_pixels
,
2275 params
->cur
.bytes_per_pixel
,
2279 /* Only for WM_LP. */
2280 static uint32_t ilk_compute_fbc_wm(const struct hsw_pipe_wm_parameters
*params
,
2283 if (!params
->active
|| !params
->pri
.enabled
)
2286 return ilk_wm_fbc(pri_val
,
2287 params
->pri
.horiz_pixels
,
2288 params
->pri
.bytes_per_pixel
);
2291 static unsigned int ilk_display_fifo_size(const struct drm_device
*dev
)
2293 if (INTEL_INFO(dev
)->gen
>= 7)
2299 /* Calculate the maximum primary/sprite plane watermark */
2300 static unsigned int ilk_plane_wm_max(const struct drm_device
*dev
,
2302 const struct intel_wm_config
*config
,
2303 enum intel_ddb_partitioning ddb_partitioning
,
2306 unsigned int fifo_size
= ilk_display_fifo_size(dev
);
2309 /* if sprites aren't enabled, sprites get nothing */
2310 if (is_sprite
&& !config
->sprites_enabled
)
2313 /* HSW allows LP1+ watermarks even with multiple pipes */
2314 if (level
== 0 || config
->num_pipes_active
> 1) {
2315 fifo_size
/= INTEL_INFO(dev
)->num_pipes
;
2318 * For some reason the non self refresh
2319 * FIFO size is only half of the self
2320 * refresh FIFO size on ILK/SNB.
2322 if (INTEL_INFO(dev
)->gen
<= 6)
2326 if (config
->sprites_enabled
) {
2327 /* level 0 is always calculated with 1:1 split */
2328 if (level
> 0 && ddb_partitioning
== INTEL_DDB_PART_5_6
) {
2337 /* clamp to max that the registers can hold */
2338 if (INTEL_INFO(dev
)->gen
>= 7)
2339 /* IVB/HSW primary/sprite plane watermarks */
2340 max
= level
== 0 ? 127 : 1023;
2341 else if (!is_sprite
)
2342 /* ILK/SNB primary plane watermarks */
2343 max
= level
== 0 ? 127 : 511;
2345 /* ILK/SNB sprite plane watermarks */
2346 max
= level
== 0 ? 63 : 255;
2348 return min(fifo_size
, max
);
2351 /* Calculate the maximum cursor plane watermark */
2352 static unsigned int ilk_cursor_wm_max(const struct drm_device
*dev
,
2354 const struct intel_wm_config
*config
)
2356 /* HSW LP1+ watermarks w/ multiple pipes */
2357 if (level
> 0 && config
->num_pipes_active
> 1)
2360 /* otherwise just report max that registers can hold */
2361 if (INTEL_INFO(dev
)->gen
>= 7)
2362 return level
== 0 ? 63 : 255;
2364 return level
== 0 ? 31 : 63;
2367 /* Calculate the maximum FBC watermark */
2368 static unsigned int ilk_fbc_wm_max(void)
2370 /* max that registers can hold */
2374 static void ilk_wm_max(struct drm_device
*dev
,
2376 const struct intel_wm_config
*config
,
2377 enum intel_ddb_partitioning ddb_partitioning
,
2378 struct hsw_wm_maximums
*max
)
2380 max
->pri
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, false);
2381 max
->spr
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, true);
2382 max
->cur
= ilk_cursor_wm_max(dev
, level
, config
);
2383 max
->fbc
= ilk_fbc_wm_max();
2386 static bool ilk_check_wm(int level
,
2387 const struct hsw_wm_maximums
*max
,
2388 struct intel_wm_level
*result
)
2392 /* already determined to be invalid? */
2393 if (!result
->enable
)
2396 result
->enable
= result
->pri_val
<= max
->pri
&&
2397 result
->spr_val
<= max
->spr
&&
2398 result
->cur_val
<= max
->cur
;
2400 ret
= result
->enable
;
2403 * HACK until we can pre-compute everything,
2404 * and thus fail gracefully if LP0 watermarks
2407 if (level
== 0 && !result
->enable
) {
2408 if (result
->pri_val
> max
->pri
)
2409 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
2410 level
, result
->pri_val
, max
->pri
);
2411 if (result
->spr_val
> max
->spr
)
2412 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2413 level
, result
->spr_val
, max
->spr
);
2414 if (result
->cur_val
> max
->cur
)
2415 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2416 level
, result
->cur_val
, max
->cur
);
2418 result
->pri_val
= min_t(uint32_t, result
->pri_val
, max
->pri
);
2419 result
->spr_val
= min_t(uint32_t, result
->spr_val
, max
->spr
);
2420 result
->cur_val
= min_t(uint32_t, result
->cur_val
, max
->cur
);
2421 result
->enable
= true;
2424 DRM_DEBUG_KMS("WM%d: %sabled\n", level
, result
->enable
? "en" : "dis");
2429 static void ilk_compute_wm_level(struct drm_i915_private
*dev_priv
,
2431 const struct hsw_pipe_wm_parameters
*p
,
2432 struct intel_wm_level
*result
)
2434 uint16_t pri_latency
= dev_priv
->wm
.pri_latency
[level
];
2435 uint16_t spr_latency
= dev_priv
->wm
.spr_latency
[level
];
2436 uint16_t cur_latency
= dev_priv
->wm
.cur_latency
[level
];
2438 /* WM1+ latency values stored in 0.5us units */
2445 result
->pri_val
= ilk_compute_pri_wm(p
, pri_latency
, level
);
2446 result
->spr_val
= ilk_compute_spr_wm(p
, spr_latency
);
2447 result
->cur_val
= ilk_compute_cur_wm(p
, cur_latency
);
2448 result
->fbc_val
= ilk_compute_fbc_wm(p
, result
->pri_val
);
2449 result
->enable
= true;
2453 hsw_compute_linetime_wm(struct drm_device
*dev
, struct drm_crtc
*crtc
)
2455 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2456 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2457 struct drm_display_mode
*mode
= &intel_crtc
->config
.adjusted_mode
;
2458 u32 linetime
, ips_linetime
;
2460 if (!intel_crtc_active(crtc
))
2463 /* The WM are computed with base on how long it takes to fill a single
2464 * row at the given clock rate, multiplied by 8.
2466 linetime
= DIV_ROUND_CLOSEST(mode
->htotal
* 1000 * 8, mode
->clock
);
2467 ips_linetime
= DIV_ROUND_CLOSEST(mode
->htotal
* 1000 * 8,
2468 intel_ddi_get_cdclk_freq(dev_priv
));
2470 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime
) |
2471 PIPE_WM_LINETIME_TIME(linetime
);
2474 static void intel_read_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2476 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2478 if (IS_HASWELL(dev
)) {
2479 uint64_t sskpd
= I915_READ64(MCH_SSKPD
);
2481 wm
[0] = (sskpd
>> 56) & 0xFF;
2483 wm
[0] = sskpd
& 0xF;
2484 wm
[1] = (sskpd
>> 4) & 0xFF;
2485 wm
[2] = (sskpd
>> 12) & 0xFF;
2486 wm
[3] = (sskpd
>> 20) & 0x1FF;
2487 wm
[4] = (sskpd
>> 32) & 0x1FF;
2488 } else if (INTEL_INFO(dev
)->gen
>= 6) {
2489 uint32_t sskpd
= I915_READ(MCH_SSKPD
);
2491 wm
[0] = (sskpd
>> SSKPD_WM0_SHIFT
) & SSKPD_WM_MASK
;
2492 wm
[1] = (sskpd
>> SSKPD_WM1_SHIFT
) & SSKPD_WM_MASK
;
2493 wm
[2] = (sskpd
>> SSKPD_WM2_SHIFT
) & SSKPD_WM_MASK
;
2494 wm
[3] = (sskpd
>> SSKPD_WM3_SHIFT
) & SSKPD_WM_MASK
;
2495 } else if (INTEL_INFO(dev
)->gen
>= 5) {
2496 uint32_t mltr
= I915_READ(MLTR_ILK
);
2498 /* ILK primary LP0 latency is 700 ns */
2500 wm
[1] = (mltr
>> MLTR_WM1_SHIFT
) & ILK_SRLT_MASK
;
2501 wm
[2] = (mltr
>> MLTR_WM2_SHIFT
) & ILK_SRLT_MASK
;
2505 static void intel_fixup_spr_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2507 /* ILK sprite LP0 latency is 1300 ns */
2508 if (INTEL_INFO(dev
)->gen
== 5)
2512 static void intel_fixup_cur_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2514 /* ILK cursor LP0 latency is 1300 ns */
2515 if (INTEL_INFO(dev
)->gen
== 5)
2518 /* WaDoubleCursorLP3Latency:ivb */
2519 if (IS_IVYBRIDGE(dev
))
2523 static int ilk_wm_max_level(const struct drm_device
*dev
)
2525 /* how many WM levels are we expecting */
2526 if (IS_HASWELL(dev
))
2528 else if (INTEL_INFO(dev
)->gen
>= 6)
2534 static void intel_print_wm_latency(struct drm_device
*dev
,
2536 const uint16_t wm
[5])
2538 int level
, max_level
= ilk_wm_max_level(dev
);
2540 for (level
= 0; level
<= max_level
; level
++) {
2541 unsigned int latency
= wm
[level
];
2544 DRM_ERROR("%s WM%d latency not provided\n",
2549 /* WM1+ latency values in 0.5us units */
2553 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2554 name
, level
, wm
[level
],
2555 latency
/ 10, latency
% 10);
2559 static void intel_setup_wm_latency(struct drm_device
*dev
)
2561 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2563 intel_read_wm_latency(dev
, dev_priv
->wm
.pri_latency
);
2565 memcpy(dev_priv
->wm
.spr_latency
, dev_priv
->wm
.pri_latency
,
2566 sizeof(dev_priv
->wm
.pri_latency
));
2567 memcpy(dev_priv
->wm
.cur_latency
, dev_priv
->wm
.pri_latency
,
2568 sizeof(dev_priv
->wm
.pri_latency
));
2570 intel_fixup_spr_wm_latency(dev
, dev_priv
->wm
.spr_latency
);
2571 intel_fixup_cur_wm_latency(dev
, dev_priv
->wm
.cur_latency
);
2573 intel_print_wm_latency(dev
, "Primary", dev_priv
->wm
.pri_latency
);
2574 intel_print_wm_latency(dev
, "Sprite", dev_priv
->wm
.spr_latency
);
2575 intel_print_wm_latency(dev
, "Cursor", dev_priv
->wm
.cur_latency
);
2578 static void hsw_compute_wm_parameters(struct drm_crtc
*crtc
,
2579 struct hsw_pipe_wm_parameters
*p
,
2580 struct intel_wm_config
*config
)
2582 struct drm_device
*dev
= crtc
->dev
;
2583 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2584 enum pipe pipe
= intel_crtc
->pipe
;
2585 struct drm_plane
*plane
;
2587 p
->active
= intel_crtc_active(crtc
);
2589 p
->pipe_htotal
= intel_crtc
->config
.adjusted_mode
.htotal
;
2590 p
->pixel_rate
= ilk_pipe_pixel_rate(dev
, crtc
);
2591 p
->pri
.bytes_per_pixel
= crtc
->fb
->bits_per_pixel
/ 8;
2592 p
->cur
.bytes_per_pixel
= 4;
2593 p
->pri
.horiz_pixels
= intel_crtc
->config
.pipe_src_w
;
2594 p
->cur
.horiz_pixels
= 64;
2595 /* TODO: for now, assume primary and cursor planes are always enabled. */
2596 p
->pri
.enabled
= true;
2597 p
->cur
.enabled
= true;
2600 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
2601 config
->num_pipes_active
+= intel_crtc_active(crtc
);
2603 list_for_each_entry(plane
, &dev
->mode_config
.plane_list
, head
) {
2604 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
2606 if (intel_plane
->pipe
== pipe
)
2607 p
->spr
= intel_plane
->wm
;
2609 config
->sprites_enabled
|= intel_plane
->wm
.enabled
;
2610 config
->sprites_scaled
|= intel_plane
->wm
.scaled
;
2614 /* Compute new watermarks for the pipe */
2615 static bool intel_compute_pipe_wm(struct drm_crtc
*crtc
,
2616 const struct hsw_pipe_wm_parameters
*params
,
2617 struct intel_pipe_wm
*pipe_wm
)
2619 struct drm_device
*dev
= crtc
->dev
;
2620 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2621 int level
, max_level
= ilk_wm_max_level(dev
);
2622 /* LP0 watermark maximums depend on this pipe alone */
2623 struct intel_wm_config config
= {
2624 .num_pipes_active
= 1,
2625 .sprites_enabled
= params
->spr
.enabled
,
2626 .sprites_scaled
= params
->spr
.scaled
,
2628 struct hsw_wm_maximums max
;
2630 /* LP0 watermarks always use 1/2 DDB partitioning */
2631 ilk_wm_max(dev
, 0, &config
, INTEL_DDB_PART_1_2
, &max
);
2633 for (level
= 0; level
<= max_level
; level
++)
2634 ilk_compute_wm_level(dev_priv
, level
, params
,
2635 &pipe_wm
->wm
[level
]);
2637 pipe_wm
->linetime
= hsw_compute_linetime_wm(dev
, crtc
);
2639 /* At least LP0 must be valid */
2640 return ilk_check_wm(0, &max
, &pipe_wm
->wm
[0]);
2644 * Merge the watermarks from all active pipes for a specific level.
2646 static void ilk_merge_wm_level(struct drm_device
*dev
,
2648 struct intel_wm_level
*ret_wm
)
2650 const struct intel_crtc
*intel_crtc
;
2652 list_for_each_entry(intel_crtc
, &dev
->mode_config
.crtc_list
, base
.head
) {
2653 const struct intel_wm_level
*wm
=
2654 &intel_crtc
->wm
.active
.wm
[level
];
2659 ret_wm
->pri_val
= max(ret_wm
->pri_val
, wm
->pri_val
);
2660 ret_wm
->spr_val
= max(ret_wm
->spr_val
, wm
->spr_val
);
2661 ret_wm
->cur_val
= max(ret_wm
->cur_val
, wm
->cur_val
);
2662 ret_wm
->fbc_val
= max(ret_wm
->fbc_val
, wm
->fbc_val
);
2665 ret_wm
->enable
= true;
2669 * Merge all low power watermarks for all active pipes.
2671 static void ilk_wm_merge(struct drm_device
*dev
,
2672 const struct hsw_wm_maximums
*max
,
2673 struct intel_pipe_wm
*merged
)
2675 int level
, max_level
= ilk_wm_max_level(dev
);
2677 merged
->fbc_wm_enabled
= true;
2679 /* merge each WM1+ level */
2680 for (level
= 1; level
<= max_level
; level
++) {
2681 struct intel_wm_level
*wm
= &merged
->wm
[level
];
2683 ilk_merge_wm_level(dev
, level
, wm
);
2685 if (!ilk_check_wm(level
, max
, wm
))
2689 * The spec says it is preferred to disable
2690 * FBC WMs instead of disabling a WM level.
2692 if (wm
->fbc_val
> max
->fbc
) {
2693 merged
->fbc_wm_enabled
= false;
2699 static int ilk_wm_lp_to_level(int wm_lp
, const struct intel_pipe_wm
*pipe_wm
)
2701 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2702 return wm_lp
+ (wm_lp
>= 2 && pipe_wm
->wm
[4].enable
);
2705 static void hsw_compute_wm_results(struct drm_device
*dev
,
2706 const struct intel_pipe_wm
*merged
,
2707 enum intel_ddb_partitioning partitioning
,
2708 struct hsw_wm_values
*results
)
2710 struct intel_crtc
*intel_crtc
;
2713 results
->enable_fbc_wm
= merged
->fbc_wm_enabled
;
2714 results
->partitioning
= partitioning
;
2716 /* LP1+ register values */
2717 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2718 const struct intel_wm_level
*r
;
2720 level
= ilk_wm_lp_to_level(wm_lp
, merged
);
2722 r
= &merged
->wm
[level
];
2726 results
->wm_lp
[wm_lp
- 1] = HSW_WM_LP_VAL(level
* 2,
2730 results
->wm_lp_spr
[wm_lp
- 1] = r
->spr_val
;
2733 /* LP0 register values */
2734 list_for_each_entry(intel_crtc
, &dev
->mode_config
.crtc_list
, base
.head
) {
2735 enum pipe pipe
= intel_crtc
->pipe
;
2736 const struct intel_wm_level
*r
=
2737 &intel_crtc
->wm
.active
.wm
[0];
2739 if (WARN_ON(!r
->enable
))
2742 results
->wm_linetime
[pipe
] = intel_crtc
->wm
.active
.linetime
;
2744 results
->wm_pipe
[pipe
] =
2745 (r
->pri_val
<< WM0_PIPE_PLANE_SHIFT
) |
2746 (r
->spr_val
<< WM0_PIPE_SPRITE_SHIFT
) |
2751 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2752 * case both are at the same level. Prefer r1 in case they're the same. */
2753 static struct intel_pipe_wm
*hsw_find_best_result(struct drm_device
*dev
,
2754 struct intel_pipe_wm
*r1
,
2755 struct intel_pipe_wm
*r2
)
2757 int level
, max_level
= ilk_wm_max_level(dev
);
2758 int level1
= 0, level2
= 0;
2760 for (level
= 1; level
<= max_level
; level
++) {
2761 if (r1
->wm
[level
].enable
)
2763 if (r2
->wm
[level
].enable
)
2767 if (level1
== level2
) {
2768 if (r2
->fbc_wm_enabled
&& !r1
->fbc_wm_enabled
)
2772 } else if (level1
> level2
) {
2780 * The spec says we shouldn't write when we don't need, because every write
2781 * causes WMs to be re-evaluated, expending some power.
2783 static void hsw_write_wm_values(struct drm_i915_private
*dev_priv
,
2784 struct hsw_wm_values
*results
)
2786 struct hsw_wm_values previous
;
2789 previous
.wm_pipe
[0] = I915_READ(WM0_PIPEA_ILK
);
2790 previous
.wm_pipe
[1] = I915_READ(WM0_PIPEB_ILK
);
2791 previous
.wm_pipe
[2] = I915_READ(WM0_PIPEC_IVB
);
2792 previous
.wm_lp
[0] = I915_READ(WM1_LP_ILK
);
2793 previous
.wm_lp
[1] = I915_READ(WM2_LP_ILK
);
2794 previous
.wm_lp
[2] = I915_READ(WM3_LP_ILK
);
2795 previous
.wm_lp_spr
[0] = I915_READ(WM1S_LP_ILK
);
2796 previous
.wm_lp_spr
[1] = I915_READ(WM2S_LP_IVB
);
2797 previous
.wm_lp_spr
[2] = I915_READ(WM3S_LP_IVB
);
2798 previous
.wm_linetime
[0] = I915_READ(PIPE_WM_LINETIME(PIPE_A
));
2799 previous
.wm_linetime
[1] = I915_READ(PIPE_WM_LINETIME(PIPE_B
));
2800 previous
.wm_linetime
[2] = I915_READ(PIPE_WM_LINETIME(PIPE_C
));
2802 previous
.partitioning
= (I915_READ(WM_MISC
) & WM_MISC_DATA_PARTITION_5_6
) ?
2803 INTEL_DDB_PART_5_6
: INTEL_DDB_PART_1_2
;
2805 previous
.enable_fbc_wm
= !(I915_READ(DISP_ARB_CTL
) & DISP_FBC_WM_DIS
);
2807 if (memcmp(results
, &previous
, sizeof(*results
)) == 0)
2810 if (previous
.wm_lp
[2] != 0)
2811 I915_WRITE(WM3_LP_ILK
, 0);
2812 if (previous
.wm_lp
[1] != 0)
2813 I915_WRITE(WM2_LP_ILK
, 0);
2814 if (previous
.wm_lp
[0] != 0)
2815 I915_WRITE(WM1_LP_ILK
, 0);
2817 if (previous
.wm_pipe
[0] != results
->wm_pipe
[0])
2818 I915_WRITE(WM0_PIPEA_ILK
, results
->wm_pipe
[0]);
2819 if (previous
.wm_pipe
[1] != results
->wm_pipe
[1])
2820 I915_WRITE(WM0_PIPEB_ILK
, results
->wm_pipe
[1]);
2821 if (previous
.wm_pipe
[2] != results
->wm_pipe
[2])
2822 I915_WRITE(WM0_PIPEC_IVB
, results
->wm_pipe
[2]);
2824 if (previous
.wm_linetime
[0] != results
->wm_linetime
[0])
2825 I915_WRITE(PIPE_WM_LINETIME(PIPE_A
), results
->wm_linetime
[0]);
2826 if (previous
.wm_linetime
[1] != results
->wm_linetime
[1])
2827 I915_WRITE(PIPE_WM_LINETIME(PIPE_B
), results
->wm_linetime
[1]);
2828 if (previous
.wm_linetime
[2] != results
->wm_linetime
[2])
2829 I915_WRITE(PIPE_WM_LINETIME(PIPE_C
), results
->wm_linetime
[2]);
2831 if (previous
.partitioning
!= results
->partitioning
) {
2832 val
= I915_READ(WM_MISC
);
2833 if (results
->partitioning
== INTEL_DDB_PART_1_2
)
2834 val
&= ~WM_MISC_DATA_PARTITION_5_6
;
2836 val
|= WM_MISC_DATA_PARTITION_5_6
;
2837 I915_WRITE(WM_MISC
, val
);
2840 if (previous
.enable_fbc_wm
!= results
->enable_fbc_wm
) {
2841 val
= I915_READ(DISP_ARB_CTL
);
2842 if (results
->enable_fbc_wm
)
2843 val
&= ~DISP_FBC_WM_DIS
;
2845 val
|= DISP_FBC_WM_DIS
;
2846 I915_WRITE(DISP_ARB_CTL
, val
);
2849 if (previous
.wm_lp_spr
[0] != results
->wm_lp_spr
[0])
2850 I915_WRITE(WM1S_LP_ILK
, results
->wm_lp_spr
[0]);
2851 if (previous
.wm_lp_spr
[1] != results
->wm_lp_spr
[1])
2852 I915_WRITE(WM2S_LP_IVB
, results
->wm_lp_spr
[1]);
2853 if (previous
.wm_lp_spr
[2] != results
->wm_lp_spr
[2])
2854 I915_WRITE(WM3S_LP_IVB
, results
->wm_lp_spr
[2]);
2856 if (results
->wm_lp
[0] != 0)
2857 I915_WRITE(WM1_LP_ILK
, results
->wm_lp
[0]);
2858 if (results
->wm_lp
[1] != 0)
2859 I915_WRITE(WM2_LP_ILK
, results
->wm_lp
[1]);
2860 if (results
->wm_lp
[2] != 0)
2861 I915_WRITE(WM3_LP_ILK
, results
->wm_lp
[2]);
2863 dev_priv
->wm
.hw
= *results
;
2866 static void haswell_update_wm(struct drm_crtc
*crtc
)
2868 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2869 struct drm_device
*dev
= crtc
->dev
;
2870 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2871 struct hsw_wm_maximums max
;
2872 struct hsw_pipe_wm_parameters params
= {};
2873 struct hsw_wm_values results
= {};
2874 enum intel_ddb_partitioning partitioning
;
2875 struct intel_pipe_wm pipe_wm
= {};
2876 struct intel_pipe_wm lp_wm_1_2
= {}, lp_wm_5_6
= {}, *best_lp_wm
;
2877 struct intel_wm_config config
= {};
2879 hsw_compute_wm_parameters(crtc
, ¶ms
, &config
);
2881 intel_compute_pipe_wm(crtc
, ¶ms
, &pipe_wm
);
2883 if (!memcmp(&intel_crtc
->wm
.active
, &pipe_wm
, sizeof(pipe_wm
)))
2886 intel_crtc
->wm
.active
= pipe_wm
;
2888 ilk_wm_max(dev
, 1, &config
, INTEL_DDB_PART_1_2
, &max
);
2889 ilk_wm_merge(dev
, &max
, &lp_wm_1_2
);
2891 /* 5/6 split only in single pipe config on IVB+ */
2892 if (INTEL_INFO(dev
)->gen
>= 7 && config
.num_pipes_active
== 1) {
2893 ilk_wm_max(dev
, 1, &config
, INTEL_DDB_PART_5_6
, &max
);
2894 ilk_wm_merge(dev
, &max
, &lp_wm_5_6
);
2896 best_lp_wm
= hsw_find_best_result(dev
, &lp_wm_1_2
, &lp_wm_5_6
);
2898 best_lp_wm
= &lp_wm_1_2
;
2901 partitioning
= (best_lp_wm
== &lp_wm_1_2
) ?
2902 INTEL_DDB_PART_1_2
: INTEL_DDB_PART_5_6
;
2904 hsw_compute_wm_results(dev
, best_lp_wm
, partitioning
, &results
);
2906 hsw_write_wm_values(dev_priv
, &results
);
2909 static void haswell_update_sprite_wm(struct drm_plane
*plane
,
2910 struct drm_crtc
*crtc
,
2911 uint32_t sprite_width
, int pixel_size
,
2912 bool enabled
, bool scaled
)
2914 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
2916 intel_plane
->wm
.enabled
= enabled
;
2917 intel_plane
->wm
.scaled
= scaled
;
2918 intel_plane
->wm
.horiz_pixels
= sprite_width
;
2919 intel_plane
->wm
.bytes_per_pixel
= pixel_size
;
2921 haswell_update_wm(crtc
);
2925 sandybridge_compute_sprite_wm(struct drm_device
*dev
, int plane
,
2926 uint32_t sprite_width
, int pixel_size
,
2927 const struct intel_watermark_params
*display
,
2928 int display_latency_ns
, int *sprite_wm
)
2930 struct drm_crtc
*crtc
;
2932 int entries
, tlb_miss
;
2934 crtc
= intel_get_crtc_for_plane(dev
, plane
);
2935 if (!intel_crtc_active(crtc
)) {
2936 *sprite_wm
= display
->guard_size
;
2940 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
2942 /* Use the small buffer method to calculate the sprite watermark */
2943 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
2944 tlb_miss
= display
->fifo_size
*display
->cacheline_size
-
2947 entries
+= tlb_miss
;
2948 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
2949 *sprite_wm
= entries
+ display
->guard_size
;
2950 if (*sprite_wm
> (int)display
->max_wm
)
2951 *sprite_wm
= display
->max_wm
;
2957 sandybridge_compute_sprite_srwm(struct drm_device
*dev
, int plane
,
2958 uint32_t sprite_width
, int pixel_size
,
2959 const struct intel_watermark_params
*display
,
2960 int latency_ns
, int *sprite_wm
)
2962 struct drm_crtc
*crtc
;
2963 unsigned long line_time_us
;
2965 int line_count
, line_size
;
2974 crtc
= intel_get_crtc_for_plane(dev
, plane
);
2975 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
2981 line_time_us
= (sprite_width
* 1000) / clock
;
2982 if (!line_time_us
) {
2987 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
2988 line_size
= sprite_width
* pixel_size
;
2990 /* Use the minimum of the small and large buffer method for primary */
2991 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
2992 large
= line_count
* line_size
;
2994 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
2995 *sprite_wm
= entries
+ display
->guard_size
;
2997 return *sprite_wm
> 0x3ff ? false : true;
3000 static void sandybridge_update_sprite_wm(struct drm_plane
*plane
,
3001 struct drm_crtc
*crtc
,
3002 uint32_t sprite_width
, int pixel_size
,
3003 bool enabled
, bool scaled
)
3005 struct drm_device
*dev
= plane
->dev
;
3006 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3007 int pipe
= to_intel_plane(plane
)->pipe
;
3008 int latency
= dev_priv
->wm
.spr_latency
[0] * 100; /* In unit 0.1us */
3018 reg
= WM0_PIPEA_ILK
;
3021 reg
= WM0_PIPEB_ILK
;
3024 reg
= WM0_PIPEC_IVB
;
3027 return; /* bad pipe */
3030 ret
= sandybridge_compute_sprite_wm(dev
, pipe
, sprite_width
, pixel_size
,
3031 &sandybridge_display_wm_info
,
3032 latency
, &sprite_wm
);
3034 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %c\n",
3039 val
= I915_READ(reg
);
3040 val
&= ~WM0_PIPE_SPRITE_MASK
;
3041 I915_WRITE(reg
, val
| (sprite_wm
<< WM0_PIPE_SPRITE_SHIFT
));
3042 DRM_DEBUG_KMS("sprite watermarks For pipe %c - %d\n", pipe_name(pipe
), sprite_wm
);
3045 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3047 &sandybridge_display_srwm_info
,
3048 dev_priv
->wm
.spr_latency
[1] * 500,
3051 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n",
3055 I915_WRITE(WM1S_LP_ILK
, sprite_wm
);
3057 /* Only IVB has two more LP watermarks for sprite */
3058 if (!IS_IVYBRIDGE(dev
))
3061 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3063 &sandybridge_display_srwm_info
,
3064 dev_priv
->wm
.spr_latency
[2] * 500,
3067 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n",
3071 I915_WRITE(WM2S_LP_IVB
, sprite_wm
);
3073 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3075 &sandybridge_display_srwm_info
,
3076 dev_priv
->wm
.spr_latency
[3] * 500,
3079 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n",
3083 I915_WRITE(WM3S_LP_IVB
, sprite_wm
);
3087 * intel_update_watermarks - update FIFO watermark values based on current modes
3089 * Calculate watermark values for the various WM regs based on current mode
3090 * and plane configuration.
3092 * There are several cases to deal with here:
3093 * - normal (i.e. non-self-refresh)
3094 * - self-refresh (SR) mode
3095 * - lines are large relative to FIFO size (buffer can hold up to 2)
3096 * - lines are small relative to FIFO size (buffer can hold more than 2
3097 * lines), so need to account for TLB latency
3099 * The normal calculation is:
3100 * watermark = dotclock * bytes per pixel * latency
3101 * where latency is platform & configuration dependent (we assume pessimal
3104 * The SR calculation is:
3105 * watermark = (trunc(latency/line time)+1) * surface width *
3108 * line time = htotal / dotclock
3109 * surface width = hdisplay for normal plane and 64 for cursor
3110 * and latency is assumed to be high, as above.
3112 * The final value programmed to the register should always be rounded up,
3113 * and include an extra 2 entries to account for clock crossings.
3115 * We don't use the sprite, so we can ignore that. And on Crestline we have
3116 * to set the non-SR watermarks to 8.
3118 void intel_update_watermarks(struct drm_crtc
*crtc
)
3120 struct drm_i915_private
*dev_priv
= crtc
->dev
->dev_private
;
3122 if (dev_priv
->display
.update_wm
)
3123 dev_priv
->display
.update_wm(crtc
);
3126 void intel_update_sprite_watermarks(struct drm_plane
*plane
,
3127 struct drm_crtc
*crtc
,
3128 uint32_t sprite_width
, int pixel_size
,
3129 bool enabled
, bool scaled
)
3131 struct drm_i915_private
*dev_priv
= plane
->dev
->dev_private
;
3133 if (dev_priv
->display
.update_sprite_wm
)
3134 dev_priv
->display
.update_sprite_wm(plane
, crtc
, sprite_width
,
3135 pixel_size
, enabled
, scaled
);
3138 static struct drm_i915_gem_object
*
3139 intel_alloc_context_page(struct drm_device
*dev
)
3141 struct drm_i915_gem_object
*ctx
;
3144 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
3146 ctx
= i915_gem_alloc_object(dev
, 4096);
3148 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
3152 ret
= i915_gem_obj_ggtt_pin(ctx
, 4096, true, false);
3154 DRM_ERROR("failed to pin power context: %d\n", ret
);
3158 ret
= i915_gem_object_set_to_gtt_domain(ctx
, 1);
3160 DRM_ERROR("failed to set-domain on power context: %d\n", ret
);
3167 i915_gem_object_unpin(ctx
);
3169 drm_gem_object_unreference(&ctx
->base
);
3174 * Lock protecting IPS related data structures
3176 DEFINE_SPINLOCK(mchdev_lock
);
3178 /* Global for IPS driver to get at the current i915 device. Protected by
3180 static struct drm_i915_private
*i915_mch_dev
;
3182 bool ironlake_set_drps(struct drm_device
*dev
, u8 val
)
3184 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3187 assert_spin_locked(&mchdev_lock
);
3189 rgvswctl
= I915_READ16(MEMSWCTL
);
3190 if (rgvswctl
& MEMCTL_CMD_STS
) {
3191 DRM_DEBUG("gpu busy, RCS change rejected\n");
3192 return false; /* still busy with another command */
3195 rgvswctl
= (MEMCTL_CMD_CHFREQ
<< MEMCTL_CMD_SHIFT
) |
3196 (val
<< MEMCTL_FREQ_SHIFT
) | MEMCTL_SFCAVM
;
3197 I915_WRITE16(MEMSWCTL
, rgvswctl
);
3198 POSTING_READ16(MEMSWCTL
);
3200 rgvswctl
|= MEMCTL_CMD_STS
;
3201 I915_WRITE16(MEMSWCTL
, rgvswctl
);
3206 static void ironlake_enable_drps(struct drm_device
*dev
)
3208 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3209 u32 rgvmodectl
= I915_READ(MEMMODECTL
);
3210 u8 fmax
, fmin
, fstart
, vstart
;
3212 spin_lock_irq(&mchdev_lock
);
3214 /* Enable temp reporting */
3215 I915_WRITE16(PMMISC
, I915_READ(PMMISC
) | MCPPCE_EN
);
3216 I915_WRITE16(TSC1
, I915_READ(TSC1
) | TSE
);
3218 /* 100ms RC evaluation intervals */
3219 I915_WRITE(RCUPEI
, 100000);
3220 I915_WRITE(RCDNEI
, 100000);
3222 /* Set max/min thresholds to 90ms and 80ms respectively */
3223 I915_WRITE(RCBMAXAVG
, 90000);
3224 I915_WRITE(RCBMINAVG
, 80000);
3226 I915_WRITE(MEMIHYST
, 1);
3228 /* Set up min, max, and cur for interrupt handling */
3229 fmax
= (rgvmodectl
& MEMMODE_FMAX_MASK
) >> MEMMODE_FMAX_SHIFT
;
3230 fmin
= (rgvmodectl
& MEMMODE_FMIN_MASK
);
3231 fstart
= (rgvmodectl
& MEMMODE_FSTART_MASK
) >>
3232 MEMMODE_FSTART_SHIFT
;
3234 vstart
= (I915_READ(PXVFREQ_BASE
+ (fstart
* 4)) & PXVFREQ_PX_MASK
) >>
3237 dev_priv
->ips
.fmax
= fmax
; /* IPS callback will increase this */
3238 dev_priv
->ips
.fstart
= fstart
;
3240 dev_priv
->ips
.max_delay
= fstart
;
3241 dev_priv
->ips
.min_delay
= fmin
;
3242 dev_priv
->ips
.cur_delay
= fstart
;
3244 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
3245 fmax
, fmin
, fstart
);
3247 I915_WRITE(MEMINTREN
, MEMINT_CX_SUPR_EN
| MEMINT_EVAL_CHG_EN
);
3250 * Interrupts will be enabled in ironlake_irq_postinstall
3253 I915_WRITE(VIDSTART
, vstart
);
3254 POSTING_READ(VIDSTART
);
3256 rgvmodectl
|= MEMMODE_SWMODE_EN
;
3257 I915_WRITE(MEMMODECTL
, rgvmodectl
);
3259 if (wait_for_atomic((I915_READ(MEMSWCTL
) & MEMCTL_CMD_STS
) == 0, 10))
3260 DRM_ERROR("stuck trying to change perf mode\n");
3263 ironlake_set_drps(dev
, fstart
);
3265 dev_priv
->ips
.last_count1
= I915_READ(0x112e4) + I915_READ(0x112e8) +
3267 dev_priv
->ips
.last_time1
= jiffies_to_msecs(jiffies
);
3268 dev_priv
->ips
.last_count2
= I915_READ(0x112f4);
3269 getrawmonotonic(&dev_priv
->ips
.last_time2
);
3271 spin_unlock_irq(&mchdev_lock
);
3274 static void ironlake_disable_drps(struct drm_device
*dev
)
3276 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3279 spin_lock_irq(&mchdev_lock
);
3281 rgvswctl
= I915_READ16(MEMSWCTL
);
3283 /* Ack interrupts, disable EFC interrupt */
3284 I915_WRITE(MEMINTREN
, I915_READ(MEMINTREN
) & ~MEMINT_EVAL_CHG_EN
);
3285 I915_WRITE(MEMINTRSTS
, MEMINT_EVAL_CHG
);
3286 I915_WRITE(DEIER
, I915_READ(DEIER
) & ~DE_PCU_EVENT
);
3287 I915_WRITE(DEIIR
, DE_PCU_EVENT
);
3288 I915_WRITE(DEIMR
, I915_READ(DEIMR
) | DE_PCU_EVENT
);
3290 /* Go back to the starting frequency */
3291 ironlake_set_drps(dev
, dev_priv
->ips
.fstart
);
3293 rgvswctl
|= MEMCTL_CMD_STS
;
3294 I915_WRITE(MEMSWCTL
, rgvswctl
);
3297 spin_unlock_irq(&mchdev_lock
);
3300 /* There's a funny hw issue where the hw returns all 0 when reading from
3301 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
3302 * ourselves, instead of doing a rmw cycle (which might result in us clearing
3303 * all limits and the gpu stuck at whatever frequency it is at atm).
3305 static u32
gen6_rps_limits(struct drm_i915_private
*dev_priv
, u8
*val
)
3311 if (*val
>= dev_priv
->rps
.max_delay
)
3312 *val
= dev_priv
->rps
.max_delay
;
3313 limits
|= dev_priv
->rps
.max_delay
<< 24;
3315 /* Only set the down limit when we've reached the lowest level to avoid
3316 * getting more interrupts, otherwise leave this clear. This prevents a
3317 * race in the hw when coming out of rc6: There's a tiny window where
3318 * the hw runs at the minimal clock before selecting the desired
3319 * frequency, if the down threshold expires in that window we will not
3320 * receive a down interrupt. */
3321 if (*val
<= dev_priv
->rps
.min_delay
) {
3322 *val
= dev_priv
->rps
.min_delay
;
3323 limits
|= dev_priv
->rps
.min_delay
<< 16;
3329 static void gen6_set_rps_thresholds(struct drm_i915_private
*dev_priv
, u8 val
)
3333 new_power
= dev_priv
->rps
.power
;
3334 switch (dev_priv
->rps
.power
) {
3336 if (val
> dev_priv
->rps
.rpe_delay
+ 1 && val
> dev_priv
->rps
.cur_delay
)
3337 new_power
= BETWEEN
;
3341 if (val
<= dev_priv
->rps
.rpe_delay
&& val
< dev_priv
->rps
.cur_delay
)
3342 new_power
= LOW_POWER
;
3343 else if (val
>= dev_priv
->rps
.rp0_delay
&& val
> dev_priv
->rps
.cur_delay
)
3344 new_power
= HIGH_POWER
;
3348 if (val
< (dev_priv
->rps
.rp1_delay
+ dev_priv
->rps
.rp0_delay
) >> 1 && val
< dev_priv
->rps
.cur_delay
)
3349 new_power
= BETWEEN
;
3352 /* Max/min bins are special */
3353 if (val
== dev_priv
->rps
.min_delay
)
3354 new_power
= LOW_POWER
;
3355 if (val
== dev_priv
->rps
.max_delay
)
3356 new_power
= HIGH_POWER
;
3357 if (new_power
== dev_priv
->rps
.power
)
3360 /* Note the units here are not exactly 1us, but 1280ns. */
3361 switch (new_power
) {
3363 /* Upclock if more than 95% busy over 16ms */
3364 I915_WRITE(GEN6_RP_UP_EI
, 12500);
3365 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 11800);
3367 /* Downclock if less than 85% busy over 32ms */
3368 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3369 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 21250);
3371 I915_WRITE(GEN6_RP_CONTROL
,
3372 GEN6_RP_MEDIA_TURBO
|
3373 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3374 GEN6_RP_MEDIA_IS_GFX
|
3376 GEN6_RP_UP_BUSY_AVG
|
3377 GEN6_RP_DOWN_IDLE_AVG
);
3381 /* Upclock if more than 90% busy over 13ms */
3382 I915_WRITE(GEN6_RP_UP_EI
, 10250);
3383 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 9225);
3385 /* Downclock if less than 75% busy over 32ms */
3386 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3387 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 18750);
3389 I915_WRITE(GEN6_RP_CONTROL
,
3390 GEN6_RP_MEDIA_TURBO
|
3391 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3392 GEN6_RP_MEDIA_IS_GFX
|
3394 GEN6_RP_UP_BUSY_AVG
|
3395 GEN6_RP_DOWN_IDLE_AVG
);
3399 /* Upclock if more than 85% busy over 10ms */
3400 I915_WRITE(GEN6_RP_UP_EI
, 8000);
3401 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 6800);
3403 /* Downclock if less than 60% busy over 32ms */
3404 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3405 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 15000);
3407 I915_WRITE(GEN6_RP_CONTROL
,
3408 GEN6_RP_MEDIA_TURBO
|
3409 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3410 GEN6_RP_MEDIA_IS_GFX
|
3412 GEN6_RP_UP_BUSY_AVG
|
3413 GEN6_RP_DOWN_IDLE_AVG
);
3417 dev_priv
->rps
.power
= new_power
;
3418 dev_priv
->rps
.last_adj
= 0;
3421 void gen6_set_rps(struct drm_device
*dev
, u8 val
)
3423 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3424 u32 limits
= gen6_rps_limits(dev_priv
, &val
);
3426 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3427 WARN_ON(val
> dev_priv
->rps
.max_delay
);
3428 WARN_ON(val
< dev_priv
->rps
.min_delay
);
3430 if (val
== dev_priv
->rps
.cur_delay
)
3433 gen6_set_rps_thresholds(dev_priv
, val
);
3435 if (IS_HASWELL(dev
))
3436 I915_WRITE(GEN6_RPNSWREQ
,
3437 HSW_FREQUENCY(val
));
3439 I915_WRITE(GEN6_RPNSWREQ
,
3440 GEN6_FREQUENCY(val
) |
3442 GEN6_AGGRESSIVE_TURBO
);
3444 /* Make sure we continue to get interrupts
3445 * until we hit the minimum or maximum frequencies.
3447 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
, limits
);
3449 POSTING_READ(GEN6_RPNSWREQ
);
3451 dev_priv
->rps
.cur_delay
= val
;
3453 trace_intel_gpu_freq_change(val
* 50);
3456 void gen6_rps_idle(struct drm_i915_private
*dev_priv
)
3458 mutex_lock(&dev_priv
->rps
.hw_lock
);
3459 if (dev_priv
->rps
.enabled
) {
3460 if (dev_priv
->info
->is_valleyview
)
3461 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3463 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3464 dev_priv
->rps
.last_adj
= 0;
3466 mutex_unlock(&dev_priv
->rps
.hw_lock
);
3469 void gen6_rps_boost(struct drm_i915_private
*dev_priv
)
3471 mutex_lock(&dev_priv
->rps
.hw_lock
);
3472 if (dev_priv
->rps
.enabled
) {
3473 if (dev_priv
->info
->is_valleyview
)
3474 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.max_delay
);
3476 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.max_delay
);
3477 dev_priv
->rps
.last_adj
= 0;
3479 mutex_unlock(&dev_priv
->rps
.hw_lock
);
3483 * Wait until the previous freq change has completed,
3484 * or the timeout elapsed, and then update our notion
3485 * of the current GPU frequency.
3487 static void vlv_update_rps_cur_delay(struct drm_i915_private
*dev_priv
)
3491 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3493 if (wait_for(((pval
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
)) & GENFREQSTATUS
) == 0, 10))
3494 DRM_DEBUG_DRIVER("timed out waiting for Punit\n");
3498 if (pval
!= dev_priv
->rps
.cur_delay
)
3499 DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n",
3500 vlv_gpu_freq(dev_priv
->mem_freq
, dev_priv
->rps
.cur_delay
),
3501 dev_priv
->rps
.cur_delay
,
3502 vlv_gpu_freq(dev_priv
->mem_freq
, pval
), pval
);
3504 dev_priv
->rps
.cur_delay
= pval
;
3507 void valleyview_set_rps(struct drm_device
*dev
, u8 val
)
3509 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3511 gen6_rps_limits(dev_priv
, &val
);
3513 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3514 WARN_ON(val
> dev_priv
->rps
.max_delay
);
3515 WARN_ON(val
< dev_priv
->rps
.min_delay
);
3517 vlv_update_rps_cur_delay(dev_priv
);
3519 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3520 vlv_gpu_freq(dev_priv
->mem_freq
,
3521 dev_priv
->rps
.cur_delay
),
3522 dev_priv
->rps
.cur_delay
,
3523 vlv_gpu_freq(dev_priv
->mem_freq
, val
), val
);
3525 if (val
== dev_priv
->rps
.cur_delay
)
3528 vlv_punit_write(dev_priv
, PUNIT_REG_GPU_FREQ_REQ
, val
);
3530 dev_priv
->rps
.cur_delay
= val
;
3532 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv
->mem_freq
, val
));
3535 static void gen6_disable_rps_interrupts(struct drm_device
*dev
)
3537 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3539 I915_WRITE(GEN6_PMINTRMSK
, 0xffffffff);
3540 I915_WRITE(GEN6_PMIER
, I915_READ(GEN6_PMIER
) & ~GEN6_PM_RPS_EVENTS
);
3541 /* Complete PM interrupt masking here doesn't race with the rps work
3542 * item again unmasking PM interrupts because that is using a different
3543 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3544 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3546 spin_lock_irq(&dev_priv
->irq_lock
);
3547 dev_priv
->rps
.pm_iir
= 0;
3548 spin_unlock_irq(&dev_priv
->irq_lock
);
3550 I915_WRITE(GEN6_PMIIR
, GEN6_PM_RPS_EVENTS
);
3553 static void gen6_disable_rps(struct drm_device
*dev
)
3555 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3557 I915_WRITE(GEN6_RC_CONTROL
, 0);
3558 I915_WRITE(GEN6_RPNSWREQ
, 1 << 31);
3560 gen6_disable_rps_interrupts(dev
);
3563 static void valleyview_disable_rps(struct drm_device
*dev
)
3565 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3567 I915_WRITE(GEN6_RC_CONTROL
, 0);
3569 gen6_disable_rps_interrupts(dev
);
3571 if (dev_priv
->vlv_pctx
) {
3572 drm_gem_object_unreference(&dev_priv
->vlv_pctx
->base
);
3573 dev_priv
->vlv_pctx
= NULL
;
3577 int intel_enable_rc6(const struct drm_device
*dev
)
3579 /* No RC6 before Ironlake */
3580 if (INTEL_INFO(dev
)->gen
< 5)
3583 /* Respect the kernel parameter if it is set */
3584 if (i915_enable_rc6
>= 0)
3585 return i915_enable_rc6
;
3587 /* Disable RC6 on Ironlake */
3588 if (INTEL_INFO(dev
)->gen
== 5)
3591 if (IS_HASWELL(dev
)) {
3592 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3593 return INTEL_RC6_ENABLE
;
3596 /* snb/ivb have more than one rc6 state. */
3597 if (INTEL_INFO(dev
)->gen
== 6) {
3598 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3599 return INTEL_RC6_ENABLE
;
3602 DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n");
3603 return (INTEL_RC6_ENABLE
| INTEL_RC6p_ENABLE
);
3606 static void gen6_enable_rps_interrupts(struct drm_device
*dev
)
3608 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3611 spin_lock_irq(&dev_priv
->irq_lock
);
3612 WARN_ON(dev_priv
->rps
.pm_iir
);
3613 snb_enable_pm_irq(dev_priv
, GEN6_PM_RPS_EVENTS
);
3614 I915_WRITE(GEN6_PMIIR
, GEN6_PM_RPS_EVENTS
);
3615 spin_unlock_irq(&dev_priv
->irq_lock
);
3617 /* only unmask PM interrupts we need. Mask all others. */
3618 enabled_intrs
= GEN6_PM_RPS_EVENTS
;
3620 /* IVB and SNB hard hangs on looping batchbuffer
3621 * if GEN6_PM_UP_EI_EXPIRED is masked.
3623 if (INTEL_INFO(dev
)->gen
<= 7 && !IS_HASWELL(dev
))
3624 enabled_intrs
|= GEN6_PM_RP_UP_EI_EXPIRED
;
3626 I915_WRITE(GEN6_PMINTRMSK
, ~enabled_intrs
);
3629 static void gen6_enable_rps(struct drm_device
*dev
)
3631 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3632 struct intel_ring_buffer
*ring
;
3635 u32 rc6vids
, pcu_mbox
, rc6_mask
= 0;
3640 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3642 /* Here begins a magic sequence of register writes to enable
3643 * auto-downclocking.
3645 * Perhaps there might be some value in exposing these to
3648 I915_WRITE(GEN6_RC_STATE
, 0);
3650 /* Clear the DBG now so we don't confuse earlier errors */
3651 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
3652 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg
);
3653 I915_WRITE(GTFIFODBG
, gtfifodbg
);
3656 gen6_gt_force_wake_get(dev_priv
);
3658 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
3659 gt_perf_status
= I915_READ(GEN6_GT_PERF_STATUS
);
3661 /* In units of 50MHz */
3662 dev_priv
->rps
.hw_max
= dev_priv
->rps
.max_delay
= rp_state_cap
& 0xff;
3663 dev_priv
->rps
.min_delay
= (rp_state_cap
>> 16) & 0xff;
3664 dev_priv
->rps
.rp1_delay
= (rp_state_cap
>> 8) & 0xff;
3665 dev_priv
->rps
.rp0_delay
= (rp_state_cap
>> 0) & 0xff;
3666 dev_priv
->rps
.rpe_delay
= dev_priv
->rps
.rp1_delay
;
3667 dev_priv
->rps
.cur_delay
= 0;
3669 /* disable the counters and set deterministic thresholds */
3670 I915_WRITE(GEN6_RC_CONTROL
, 0);
3672 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT
, 1000 << 16);
3673 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16 | 30);
3674 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT
, 30);
3675 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
3676 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
3678 for_each_ring(ring
, dev_priv
, i
)
3679 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
3681 I915_WRITE(GEN6_RC_SLEEP
, 0);
3682 I915_WRITE(GEN6_RC1e_THRESHOLD
, 1000);
3683 if (INTEL_INFO(dev
)->gen
<= 6 || IS_IVYBRIDGE(dev
))
3684 I915_WRITE(GEN6_RC6_THRESHOLD
, 125000);
3686 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000);
3687 I915_WRITE(GEN6_RC6p_THRESHOLD
, 150000);
3688 I915_WRITE(GEN6_RC6pp_THRESHOLD
, 64000); /* unused */
3690 /* Check if we are enabling RC6 */
3691 rc6_mode
= intel_enable_rc6(dev_priv
->dev
);
3692 if (rc6_mode
& INTEL_RC6_ENABLE
)
3693 rc6_mask
|= GEN6_RC_CTL_RC6_ENABLE
;
3695 /* We don't use those on Haswell */
3696 if (!IS_HASWELL(dev
)) {
3697 if (rc6_mode
& INTEL_RC6p_ENABLE
)
3698 rc6_mask
|= GEN6_RC_CTL_RC6p_ENABLE
;
3700 if (rc6_mode
& INTEL_RC6pp_ENABLE
)
3701 rc6_mask
|= GEN6_RC_CTL_RC6pp_ENABLE
;
3704 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3705 (rc6_mask
& GEN6_RC_CTL_RC6_ENABLE
) ? "on" : "off",
3706 (rc6_mask
& GEN6_RC_CTL_RC6p_ENABLE
) ? "on" : "off",
3707 (rc6_mask
& GEN6_RC_CTL_RC6pp_ENABLE
) ? "on" : "off");
3709 I915_WRITE(GEN6_RC_CONTROL
,
3711 GEN6_RC_CTL_EI_MODE(1) |
3712 GEN6_RC_CTL_HW_ENABLE
);
3714 /* Power down if completely idle for over 50ms */
3715 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 50000);
3716 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
3718 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_MIN_FREQ_TABLE
, 0);
3721 ret
= sandybridge_pcode_read(dev_priv
, GEN6_READ_OC_PARAMS
, &pcu_mbox
);
3722 if (!ret
&& (pcu_mbox
& (1<<31))) { /* OC supported */
3723 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3724 (dev_priv
->rps
.max_delay
& 0xff) * 50,
3725 (pcu_mbox
& 0xff) * 50);
3726 dev_priv
->rps
.hw_max
= pcu_mbox
& 0xff;
3729 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3732 dev_priv
->rps
.power
= HIGH_POWER
; /* force a reset */
3733 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3735 gen6_enable_rps_interrupts(dev
);
3738 ret
= sandybridge_pcode_read(dev_priv
, GEN6_PCODE_READ_RC6VIDS
, &rc6vids
);
3739 if (IS_GEN6(dev
) && ret
) {
3740 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3741 } else if (IS_GEN6(dev
) && (GEN6_DECODE_RC6_VID(rc6vids
& 0xff) < 450)) {
3742 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3743 GEN6_DECODE_RC6_VID(rc6vids
& 0xff), 450);
3744 rc6vids
&= 0xffff00;
3745 rc6vids
|= GEN6_ENCODE_RC6_VID(450);
3746 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_RC6VIDS
, rc6vids
);
3748 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3751 gen6_gt_force_wake_put(dev_priv
);
3754 void gen6_update_ring_freq(struct drm_device
*dev
)
3756 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3758 unsigned int gpu_freq
;
3759 unsigned int max_ia_freq
, min_ring_freq
;
3760 int scaling_factor
= 180;
3761 struct cpufreq_policy
*policy
;
3763 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3765 policy
= cpufreq_cpu_get(0);
3767 max_ia_freq
= policy
->cpuinfo
.max_freq
;
3768 cpufreq_cpu_put(policy
);
3771 * Default to measured freq if none found, PCU will ensure we
3774 max_ia_freq
= tsc_khz
;
3777 /* Convert from kHz to MHz */
3778 max_ia_freq
/= 1000;
3780 min_ring_freq
= I915_READ(MCHBAR_MIRROR_BASE_SNB
+ DCLK
) & 0xf;
3781 /* convert DDR frequency from units of 266.6MHz to bandwidth */
3782 min_ring_freq
= mult_frac(min_ring_freq
, 8, 3);
3785 * For each potential GPU frequency, load a ring frequency we'd like
3786 * to use for memory access. We do this by specifying the IA frequency
3787 * the PCU should use as a reference to determine the ring frequency.
3789 for (gpu_freq
= dev_priv
->rps
.max_delay
; gpu_freq
>= dev_priv
->rps
.min_delay
;
3791 int diff
= dev_priv
->rps
.max_delay
- gpu_freq
;
3792 unsigned int ia_freq
= 0, ring_freq
= 0;
3794 if (IS_HASWELL(dev
)) {
3795 ring_freq
= mult_frac(gpu_freq
, 5, 4);
3796 ring_freq
= max(min_ring_freq
, ring_freq
);
3797 /* leave ia_freq as the default, chosen by cpufreq */
3799 /* On older processors, there is no separate ring
3800 * clock domain, so in order to boost the bandwidth
3801 * of the ring, we need to upclock the CPU (ia_freq).
3803 * For GPU frequencies less than 750MHz,
3804 * just use the lowest ring freq.
3806 if (gpu_freq
< min_freq
)
3809 ia_freq
= max_ia_freq
- ((diff
* scaling_factor
) / 2);
3810 ia_freq
= DIV_ROUND_CLOSEST(ia_freq
, 100);
3813 sandybridge_pcode_write(dev_priv
,
3814 GEN6_PCODE_WRITE_MIN_FREQ_TABLE
,
3815 ia_freq
<< GEN6_PCODE_FREQ_IA_RATIO_SHIFT
|
3816 ring_freq
<< GEN6_PCODE_FREQ_RING_RATIO_SHIFT
|
3821 int valleyview_rps_max_freq(struct drm_i915_private
*dev_priv
)
3825 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FREQ_FUSE
);
3827 rp0
= (val
& FB_GFX_MAX_FREQ_FUSE_MASK
) >> FB_GFX_MAX_FREQ_FUSE_SHIFT
;
3829 rp0
= min_t(u32
, rp0
, 0xea);
3834 static int valleyview_rps_rpe_freq(struct drm_i915_private
*dev_priv
)
3838 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_LO
);
3839 rpe
= (val
& FB_FMAX_VMIN_FREQ_LO_MASK
) >> FB_FMAX_VMIN_FREQ_LO_SHIFT
;
3840 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_HI
);
3841 rpe
|= (val
& FB_FMAX_VMIN_FREQ_HI_MASK
) << 5;
3846 int valleyview_rps_min_freq(struct drm_i915_private
*dev_priv
)
3848 return vlv_punit_read(dev_priv
, PUNIT_REG_GPU_LFM
) & 0xff;
3851 static void valleyview_setup_pctx(struct drm_device
*dev
)
3853 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3854 struct drm_i915_gem_object
*pctx
;
3855 unsigned long pctx_paddr
;
3857 int pctx_size
= 24*1024;
3859 pcbr
= I915_READ(VLV_PCBR
);
3861 /* BIOS set it up already, grab the pre-alloc'd space */
3864 pcbr_offset
= (pcbr
& (~4095)) - dev_priv
->mm
.stolen_base
;
3865 pctx
= i915_gem_object_create_stolen_for_preallocated(dev_priv
->dev
,
3867 I915_GTT_OFFSET_NONE
,
3873 * From the Gunit register HAS:
3874 * The Gfx driver is expected to program this register and ensure
3875 * proper allocation within Gfx stolen memory. For example, this
3876 * register should be programmed such than the PCBR range does not
3877 * overlap with other ranges, such as the frame buffer, protected
3878 * memory, or any other relevant ranges.
3880 pctx
= i915_gem_object_create_stolen(dev
, pctx_size
);
3882 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
3886 pctx_paddr
= dev_priv
->mm
.stolen_base
+ pctx
->stolen
->start
;
3887 I915_WRITE(VLV_PCBR
, pctx_paddr
);
3890 dev_priv
->vlv_pctx
= pctx
;
3893 static void valleyview_enable_rps(struct drm_device
*dev
)
3895 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3896 struct intel_ring_buffer
*ring
;
3897 u32 gtfifodbg
, val
, rc6_mode
= 0;
3900 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3902 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
3903 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
3905 I915_WRITE(GTFIFODBG
, gtfifodbg
);
3908 valleyview_setup_pctx(dev
);
3910 gen6_gt_force_wake_get(dev_priv
);
3912 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 59400);
3913 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 245000);
3914 I915_WRITE(GEN6_RP_UP_EI
, 66000);
3915 I915_WRITE(GEN6_RP_DOWN_EI
, 350000);
3917 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
3919 I915_WRITE(GEN6_RP_CONTROL
,
3920 GEN6_RP_MEDIA_TURBO
|
3921 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3922 GEN6_RP_MEDIA_IS_GFX
|
3924 GEN6_RP_UP_BUSY_AVG
|
3925 GEN6_RP_DOWN_IDLE_CONT
);
3927 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 0x00280000);
3928 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
3929 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
3931 for_each_ring(ring
, dev_priv
, i
)
3932 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
3934 I915_WRITE(GEN6_RC6_THRESHOLD
, 0xc350);
3936 /* allows RC6 residency counter to work */
3937 I915_WRITE(VLV_COUNTER_CONTROL
,
3938 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH
|
3939 VLV_MEDIA_RC6_COUNT_EN
|
3940 VLV_RENDER_RC6_COUNT_EN
));
3941 if (intel_enable_rc6(dev
) & INTEL_RC6_ENABLE
)
3942 rc6_mode
= GEN7_RC_CTL_TO_MODE
;
3943 I915_WRITE(GEN6_RC_CONTROL
, rc6_mode
);
3945 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
3946 switch ((val
>> 6) & 3) {
3949 dev_priv
->mem_freq
= 800;
3952 dev_priv
->mem_freq
= 1066;
3955 dev_priv
->mem_freq
= 1333;
3958 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv
->mem_freq
);
3960 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val
& 0x10 ? "yes" : "no");
3961 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val
);
3963 dev_priv
->rps
.cur_delay
= (val
>> 8) & 0xff;
3964 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
3965 vlv_gpu_freq(dev_priv
->mem_freq
,
3966 dev_priv
->rps
.cur_delay
),
3967 dev_priv
->rps
.cur_delay
);
3969 dev_priv
->rps
.max_delay
= valleyview_rps_max_freq(dev_priv
);
3970 dev_priv
->rps
.hw_max
= dev_priv
->rps
.max_delay
;
3971 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
3972 vlv_gpu_freq(dev_priv
->mem_freq
,
3973 dev_priv
->rps
.max_delay
),
3974 dev_priv
->rps
.max_delay
);
3976 dev_priv
->rps
.rpe_delay
= valleyview_rps_rpe_freq(dev_priv
);
3977 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
3978 vlv_gpu_freq(dev_priv
->mem_freq
,
3979 dev_priv
->rps
.rpe_delay
),
3980 dev_priv
->rps
.rpe_delay
);
3982 dev_priv
->rps
.min_delay
= valleyview_rps_min_freq(dev_priv
);
3983 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
3984 vlv_gpu_freq(dev_priv
->mem_freq
,
3985 dev_priv
->rps
.min_delay
),
3986 dev_priv
->rps
.min_delay
);
3988 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
3989 vlv_gpu_freq(dev_priv
->mem_freq
,
3990 dev_priv
->rps
.rpe_delay
),
3991 dev_priv
->rps
.rpe_delay
);
3993 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.rpe_delay
);
3995 gen6_enable_rps_interrupts(dev
);
3997 gen6_gt_force_wake_put(dev_priv
);
4000 void ironlake_teardown_rc6(struct drm_device
*dev
)
4002 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4004 if (dev_priv
->ips
.renderctx
) {
4005 i915_gem_object_unpin(dev_priv
->ips
.renderctx
);
4006 drm_gem_object_unreference(&dev_priv
->ips
.renderctx
->base
);
4007 dev_priv
->ips
.renderctx
= NULL
;
4010 if (dev_priv
->ips
.pwrctx
) {
4011 i915_gem_object_unpin(dev_priv
->ips
.pwrctx
);
4012 drm_gem_object_unreference(&dev_priv
->ips
.pwrctx
->base
);
4013 dev_priv
->ips
.pwrctx
= NULL
;
4017 static void ironlake_disable_rc6(struct drm_device
*dev
)
4019 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4021 if (I915_READ(PWRCTXA
)) {
4022 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
4023 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) | RCX_SW_EXIT
);
4024 wait_for(((I915_READ(RSTDBYCTL
) & RSX_STATUS_MASK
) == RSX_STATUS_ON
),
4027 I915_WRITE(PWRCTXA
, 0);
4028 POSTING_READ(PWRCTXA
);
4030 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
4031 POSTING_READ(RSTDBYCTL
);
4035 static int ironlake_setup_rc6(struct drm_device
*dev
)
4037 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4039 if (dev_priv
->ips
.renderctx
== NULL
)
4040 dev_priv
->ips
.renderctx
= intel_alloc_context_page(dev
);
4041 if (!dev_priv
->ips
.renderctx
)
4044 if (dev_priv
->ips
.pwrctx
== NULL
)
4045 dev_priv
->ips
.pwrctx
= intel_alloc_context_page(dev
);
4046 if (!dev_priv
->ips
.pwrctx
) {
4047 ironlake_teardown_rc6(dev
);
4054 static void ironlake_enable_rc6(struct drm_device
*dev
)
4056 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4057 struct intel_ring_buffer
*ring
= &dev_priv
->ring
[RCS
];
4058 bool was_interruptible
;
4061 /* rc6 disabled by default due to repeated reports of hanging during
4064 if (!intel_enable_rc6(dev
))
4067 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
4069 ret
= ironlake_setup_rc6(dev
);
4073 was_interruptible
= dev_priv
->mm
.interruptible
;
4074 dev_priv
->mm
.interruptible
= false;
4077 * GPU can automatically power down the render unit if given a page
4080 ret
= intel_ring_begin(ring
, 6);
4082 ironlake_teardown_rc6(dev
);
4083 dev_priv
->mm
.interruptible
= was_interruptible
;
4087 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
| MI_SUSPEND_FLUSH_EN
);
4088 intel_ring_emit(ring
, MI_SET_CONTEXT
);
4089 intel_ring_emit(ring
, i915_gem_obj_ggtt_offset(dev_priv
->ips
.renderctx
) |
4091 MI_SAVE_EXT_STATE_EN
|
4092 MI_RESTORE_EXT_STATE_EN
|
4093 MI_RESTORE_INHIBIT
);
4094 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
);
4095 intel_ring_emit(ring
, MI_NOOP
);
4096 intel_ring_emit(ring
, MI_FLUSH
);
4097 intel_ring_advance(ring
);
4100 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
4101 * does an implicit flush, combined with MI_FLUSH above, it should be
4102 * safe to assume that renderctx is valid
4104 ret
= intel_ring_idle(ring
);
4105 dev_priv
->mm
.interruptible
= was_interruptible
;
4107 DRM_ERROR("failed to enable ironlake power savings\n");
4108 ironlake_teardown_rc6(dev
);
4112 I915_WRITE(PWRCTXA
, i915_gem_obj_ggtt_offset(dev_priv
->ips
.pwrctx
) | PWRCTX_EN
);
4113 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
4116 static unsigned long intel_pxfreq(u32 vidfreq
)
4119 int div
= (vidfreq
& 0x3f0000) >> 16;
4120 int post
= (vidfreq
& 0x3000) >> 12;
4121 int pre
= (vidfreq
& 0x7);
4126 freq
= ((div
* 133333) / ((1<<post
) * pre
));
4131 static const struct cparams
{
4137 { 1, 1333, 301, 28664 },
4138 { 1, 1066, 294, 24460 },
4139 { 1, 800, 294, 25192 },
4140 { 0, 1333, 276, 27605 },
4141 { 0, 1066, 276, 27605 },
4142 { 0, 800, 231, 23784 },
4145 static unsigned long __i915_chipset_val(struct drm_i915_private
*dev_priv
)
4147 u64 total_count
, diff
, ret
;
4148 u32 count1
, count2
, count3
, m
= 0, c
= 0;
4149 unsigned long now
= jiffies_to_msecs(jiffies
), diff1
;
4152 assert_spin_locked(&mchdev_lock
);
4154 diff1
= now
- dev_priv
->ips
.last_time1
;
4156 /* Prevent division-by-zero if we are asking too fast.
4157 * Also, we don't get interesting results if we are polling
4158 * faster than once in 10ms, so just return the saved value
4162 return dev_priv
->ips
.chipset_power
;
4164 count1
= I915_READ(DMIEC
);
4165 count2
= I915_READ(DDREC
);
4166 count3
= I915_READ(CSIEC
);
4168 total_count
= count1
+ count2
+ count3
;
4170 /* FIXME: handle per-counter overflow */
4171 if (total_count
< dev_priv
->ips
.last_count1
) {
4172 diff
= ~0UL - dev_priv
->ips
.last_count1
;
4173 diff
+= total_count
;
4175 diff
= total_count
- dev_priv
->ips
.last_count1
;
4178 for (i
= 0; i
< ARRAY_SIZE(cparams
); i
++) {
4179 if (cparams
[i
].i
== dev_priv
->ips
.c_m
&&
4180 cparams
[i
].t
== dev_priv
->ips
.r_t
) {
4187 diff
= div_u64(diff
, diff1
);
4188 ret
= ((m
* diff
) + c
);
4189 ret
= div_u64(ret
, 10);
4191 dev_priv
->ips
.last_count1
= total_count
;
4192 dev_priv
->ips
.last_time1
= now
;
4194 dev_priv
->ips
.chipset_power
= ret
;
4199 unsigned long i915_chipset_val(struct drm_i915_private
*dev_priv
)
4203 if (dev_priv
->info
->gen
!= 5)
4206 spin_lock_irq(&mchdev_lock
);
4208 val
= __i915_chipset_val(dev_priv
);
4210 spin_unlock_irq(&mchdev_lock
);
4215 unsigned long i915_mch_val(struct drm_i915_private
*dev_priv
)
4217 unsigned long m
, x
, b
;
4220 tsfs
= I915_READ(TSFS
);
4222 m
= ((tsfs
& TSFS_SLOPE_MASK
) >> TSFS_SLOPE_SHIFT
);
4223 x
= I915_READ8(TR1
);
4225 b
= tsfs
& TSFS_INTR_MASK
;
4227 return ((m
* x
) / 127) - b
;
4230 static u16
pvid_to_extvid(struct drm_i915_private
*dev_priv
, u8 pxvid
)
4232 static const struct v_table
{
4233 u16 vd
; /* in .1 mil */
4234 u16 vm
; /* in .1 mil */
4365 if (dev_priv
->info
->is_mobile
)
4366 return v_table
[pxvid
].vm
;
4368 return v_table
[pxvid
].vd
;
4371 static void __i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
4373 struct timespec now
, diff1
;
4375 unsigned long diffms
;
4378 assert_spin_locked(&mchdev_lock
);
4380 getrawmonotonic(&now
);
4381 diff1
= timespec_sub(now
, dev_priv
->ips
.last_time2
);
4383 /* Don't divide by 0 */
4384 diffms
= diff1
.tv_sec
* 1000 + diff1
.tv_nsec
/ 1000000;
4388 count
= I915_READ(GFXEC
);
4390 if (count
< dev_priv
->ips
.last_count2
) {
4391 diff
= ~0UL - dev_priv
->ips
.last_count2
;
4394 diff
= count
- dev_priv
->ips
.last_count2
;
4397 dev_priv
->ips
.last_count2
= count
;
4398 dev_priv
->ips
.last_time2
= now
;
4400 /* More magic constants... */
4402 diff
= div_u64(diff
, diffms
* 10);
4403 dev_priv
->ips
.gfx_power
= diff
;
4406 void i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
4408 if (dev_priv
->info
->gen
!= 5)
4411 spin_lock_irq(&mchdev_lock
);
4413 __i915_update_gfx_val(dev_priv
);
4415 spin_unlock_irq(&mchdev_lock
);
4418 static unsigned long __i915_gfx_val(struct drm_i915_private
*dev_priv
)
4420 unsigned long t
, corr
, state1
, corr2
, state2
;
4423 assert_spin_locked(&mchdev_lock
);
4425 pxvid
= I915_READ(PXVFREQ_BASE
+ (dev_priv
->rps
.cur_delay
* 4));
4426 pxvid
= (pxvid
>> 24) & 0x7f;
4427 ext_v
= pvid_to_extvid(dev_priv
, pxvid
);
4431 t
= i915_mch_val(dev_priv
);
4433 /* Revel in the empirically derived constants */
4435 /* Correction factor in 1/100000 units */
4437 corr
= ((t
* 2349) + 135940);
4439 corr
= ((t
* 964) + 29317);
4441 corr
= ((t
* 301) + 1004);
4443 corr
= corr
* ((150142 * state1
) / 10000 - 78642);
4445 corr2
= (corr
* dev_priv
->ips
.corr
);
4447 state2
= (corr2
* state1
) / 10000;
4448 state2
/= 100; /* convert to mW */
4450 __i915_update_gfx_val(dev_priv
);
4452 return dev_priv
->ips
.gfx_power
+ state2
;
4455 unsigned long i915_gfx_val(struct drm_i915_private
*dev_priv
)
4459 if (dev_priv
->info
->gen
!= 5)
4462 spin_lock_irq(&mchdev_lock
);
4464 val
= __i915_gfx_val(dev_priv
);
4466 spin_unlock_irq(&mchdev_lock
);
4472 * i915_read_mch_val - return value for IPS use
4474 * Calculate and return a value for the IPS driver to use when deciding whether
4475 * we have thermal and power headroom to increase CPU or GPU power budget.
4477 unsigned long i915_read_mch_val(void)
4479 struct drm_i915_private
*dev_priv
;
4480 unsigned long chipset_val
, graphics_val
, ret
= 0;
4482 spin_lock_irq(&mchdev_lock
);
4485 dev_priv
= i915_mch_dev
;
4487 chipset_val
= __i915_chipset_val(dev_priv
);
4488 graphics_val
= __i915_gfx_val(dev_priv
);
4490 ret
= chipset_val
+ graphics_val
;
4493 spin_unlock_irq(&mchdev_lock
);
4497 EXPORT_SYMBOL_GPL(i915_read_mch_val
);
4500 * i915_gpu_raise - raise GPU frequency limit
4502 * Raise the limit; IPS indicates we have thermal headroom.
4504 bool i915_gpu_raise(void)
4506 struct drm_i915_private
*dev_priv
;
4509 spin_lock_irq(&mchdev_lock
);
4510 if (!i915_mch_dev
) {
4514 dev_priv
= i915_mch_dev
;
4516 if (dev_priv
->ips
.max_delay
> dev_priv
->ips
.fmax
)
4517 dev_priv
->ips
.max_delay
--;
4520 spin_unlock_irq(&mchdev_lock
);
4524 EXPORT_SYMBOL_GPL(i915_gpu_raise
);
4527 * i915_gpu_lower - lower GPU frequency limit
4529 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4530 * frequency maximum.
4532 bool i915_gpu_lower(void)
4534 struct drm_i915_private
*dev_priv
;
4537 spin_lock_irq(&mchdev_lock
);
4538 if (!i915_mch_dev
) {
4542 dev_priv
= i915_mch_dev
;
4544 if (dev_priv
->ips
.max_delay
< dev_priv
->ips
.min_delay
)
4545 dev_priv
->ips
.max_delay
++;
4548 spin_unlock_irq(&mchdev_lock
);
4552 EXPORT_SYMBOL_GPL(i915_gpu_lower
);
4555 * i915_gpu_busy - indicate GPU business to IPS
4557 * Tell the IPS driver whether or not the GPU is busy.
4559 bool i915_gpu_busy(void)
4561 struct drm_i915_private
*dev_priv
;
4562 struct intel_ring_buffer
*ring
;
4566 spin_lock_irq(&mchdev_lock
);
4569 dev_priv
= i915_mch_dev
;
4571 for_each_ring(ring
, dev_priv
, i
)
4572 ret
|= !list_empty(&ring
->request_list
);
4575 spin_unlock_irq(&mchdev_lock
);
4579 EXPORT_SYMBOL_GPL(i915_gpu_busy
);
4582 * i915_gpu_turbo_disable - disable graphics turbo
4584 * Disable graphics turbo by resetting the max frequency and setting the
4585 * current frequency to the default.
4587 bool i915_gpu_turbo_disable(void)
4589 struct drm_i915_private
*dev_priv
;
4592 spin_lock_irq(&mchdev_lock
);
4593 if (!i915_mch_dev
) {
4597 dev_priv
= i915_mch_dev
;
4599 dev_priv
->ips
.max_delay
= dev_priv
->ips
.fstart
;
4601 if (!ironlake_set_drps(dev_priv
->dev
, dev_priv
->ips
.fstart
))
4605 spin_unlock_irq(&mchdev_lock
);
4609 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable
);
4612 * Tells the intel_ips driver that the i915 driver is now loaded, if
4613 * IPS got loaded first.
4615 * This awkward dance is so that neither module has to depend on the
4616 * other in order for IPS to do the appropriate communication of
4617 * GPU turbo limits to i915.
4620 ips_ping_for_i915_load(void)
4624 link
= symbol_get(ips_link_to_i915_driver
);
4627 symbol_put(ips_link_to_i915_driver
);
4631 void intel_gpu_ips_init(struct drm_i915_private
*dev_priv
)
4633 /* We only register the i915 ips part with intel-ips once everything is
4634 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4635 spin_lock_irq(&mchdev_lock
);
4636 i915_mch_dev
= dev_priv
;
4637 spin_unlock_irq(&mchdev_lock
);
4639 ips_ping_for_i915_load();
4642 void intel_gpu_ips_teardown(void)
4644 spin_lock_irq(&mchdev_lock
);
4645 i915_mch_dev
= NULL
;
4646 spin_unlock_irq(&mchdev_lock
);
4648 static void intel_init_emon(struct drm_device
*dev
)
4650 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4655 /* Disable to program */
4659 /* Program energy weights for various events */
4660 I915_WRITE(SDEW
, 0x15040d00);
4661 I915_WRITE(CSIEW0
, 0x007f0000);
4662 I915_WRITE(CSIEW1
, 0x1e220004);
4663 I915_WRITE(CSIEW2
, 0x04000004);
4665 for (i
= 0; i
< 5; i
++)
4666 I915_WRITE(PEW
+ (i
* 4), 0);
4667 for (i
= 0; i
< 3; i
++)
4668 I915_WRITE(DEW
+ (i
* 4), 0);
4670 /* Program P-state weights to account for frequency power adjustment */
4671 for (i
= 0; i
< 16; i
++) {
4672 u32 pxvidfreq
= I915_READ(PXVFREQ_BASE
+ (i
* 4));
4673 unsigned long freq
= intel_pxfreq(pxvidfreq
);
4674 unsigned long vid
= (pxvidfreq
& PXVFREQ_PX_MASK
) >>
4679 val
*= (freq
/ 1000);
4681 val
/= (127*127*900);
4683 DRM_ERROR("bad pxval: %ld\n", val
);
4686 /* Render standby states get 0 weight */
4690 for (i
= 0; i
< 4; i
++) {
4691 u32 val
= (pxw
[i
*4] << 24) | (pxw
[(i
*4)+1] << 16) |
4692 (pxw
[(i
*4)+2] << 8) | (pxw
[(i
*4)+3]);
4693 I915_WRITE(PXW
+ (i
* 4), val
);
4696 /* Adjust magic regs to magic values (more experimental results) */
4697 I915_WRITE(OGW0
, 0);
4698 I915_WRITE(OGW1
, 0);
4699 I915_WRITE(EG0
, 0x00007f00);
4700 I915_WRITE(EG1
, 0x0000000e);
4701 I915_WRITE(EG2
, 0x000e0000);
4702 I915_WRITE(EG3
, 0x68000300);
4703 I915_WRITE(EG4
, 0x42000000);
4704 I915_WRITE(EG5
, 0x00140031);
4708 for (i
= 0; i
< 8; i
++)
4709 I915_WRITE(PXWL
+ (i
* 4), 0);
4711 /* Enable PMON + select events */
4712 I915_WRITE(ECR
, 0x80000019);
4714 lcfuse
= I915_READ(LCFUSE02
);
4716 dev_priv
->ips
.corr
= (lcfuse
& LCFUSE_HIV_MASK
);
4719 void intel_disable_gt_powersave(struct drm_device
*dev
)
4721 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4723 /* Interrupts should be disabled already to avoid re-arming. */
4724 WARN_ON(dev
->irq_enabled
);
4726 if (IS_IRONLAKE_M(dev
)) {
4727 ironlake_disable_drps(dev
);
4728 ironlake_disable_rc6(dev
);
4729 } else if (INTEL_INFO(dev
)->gen
>= 6) {
4730 cancel_delayed_work_sync(&dev_priv
->rps
.delayed_resume_work
);
4731 cancel_work_sync(&dev_priv
->rps
.work
);
4732 mutex_lock(&dev_priv
->rps
.hw_lock
);
4733 if (IS_VALLEYVIEW(dev
))
4734 valleyview_disable_rps(dev
);
4736 gen6_disable_rps(dev
);
4737 dev_priv
->rps
.enabled
= false;
4738 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4742 static void intel_gen6_powersave_work(struct work_struct
*work
)
4744 struct drm_i915_private
*dev_priv
=
4745 container_of(work
, struct drm_i915_private
,
4746 rps
.delayed_resume_work
.work
);
4747 struct drm_device
*dev
= dev_priv
->dev
;
4749 mutex_lock(&dev_priv
->rps
.hw_lock
);
4751 if (IS_VALLEYVIEW(dev
)) {
4752 valleyview_enable_rps(dev
);
4754 gen6_enable_rps(dev
);
4755 gen6_update_ring_freq(dev
);
4757 dev_priv
->rps
.enabled
= true;
4758 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4761 void intel_enable_gt_powersave(struct drm_device
*dev
)
4763 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4765 if (IS_IRONLAKE_M(dev
)) {
4766 ironlake_enable_drps(dev
);
4767 ironlake_enable_rc6(dev
);
4768 intel_init_emon(dev
);
4769 } else if (IS_GEN6(dev
) || IS_GEN7(dev
)) {
4771 * PCU communication is slow and this doesn't need to be
4772 * done at any specific time, so do this out of our fast path
4773 * to make resume and init faster.
4775 schedule_delayed_work(&dev_priv
->rps
.delayed_resume_work
,
4776 round_jiffies_up_relative(HZ
));
4780 static void ibx_init_clock_gating(struct drm_device
*dev
)
4782 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4785 * On Ibex Peak and Cougar Point, we need to disable clock
4786 * gating for the panel power sequencer or it will fail to
4787 * start up when no ports are active.
4789 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
4792 static void g4x_disable_trickle_feed(struct drm_device
*dev
)
4794 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4797 for_each_pipe(pipe
) {
4798 I915_WRITE(DSPCNTR(pipe
),
4799 I915_READ(DSPCNTR(pipe
)) |
4800 DISPPLANE_TRICKLE_FEED_DISABLE
);
4801 intel_flush_primary_plane(dev_priv
, pipe
);
4805 static void ironlake_init_clock_gating(struct drm_device
*dev
)
4807 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4808 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
4812 * WaFbcDisableDpfcClockGating:ilk
4814 dspclk_gate
|= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE
|
4815 ILK_DPFCUNIT_CLOCK_GATE_DISABLE
|
4816 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
;
4818 I915_WRITE(PCH_3DCGDIS0
,
4819 MARIUNIT_CLOCK_GATE_DISABLE
|
4820 SVSMUNIT_CLOCK_GATE_DISABLE
);
4821 I915_WRITE(PCH_3DCGDIS1
,
4822 VFMUNIT_CLOCK_GATE_DISABLE
);
4825 * According to the spec the following bits should be set in
4826 * order to enable memory self-refresh
4827 * The bit 22/21 of 0x42004
4828 * The bit 5 of 0x42020
4829 * The bit 15 of 0x45000
4831 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4832 (I915_READ(ILK_DISPLAY_CHICKEN2
) |
4833 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
));
4834 dspclk_gate
|= ILK_DPARBUNIT_CLOCK_GATE_ENABLE
;
4835 I915_WRITE(DISP_ARB_CTL
,
4836 (I915_READ(DISP_ARB_CTL
) |
4838 I915_WRITE(WM3_LP_ILK
, 0);
4839 I915_WRITE(WM2_LP_ILK
, 0);
4840 I915_WRITE(WM1_LP_ILK
, 0);
4843 * Based on the document from hardware guys the following bits
4844 * should be set unconditionally in order to enable FBC.
4845 * The bit 22 of 0x42000
4846 * The bit 22 of 0x42004
4847 * The bit 7,8,9 of 0x42020.
4849 if (IS_IRONLAKE_M(dev
)) {
4850 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
4851 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
4852 I915_READ(ILK_DISPLAY_CHICKEN1
) |
4854 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4855 I915_READ(ILK_DISPLAY_CHICKEN2
) |
4859 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
4861 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4862 I915_READ(ILK_DISPLAY_CHICKEN2
) |
4863 ILK_ELPIN_409_SELECT
);
4864 I915_WRITE(_3D_CHICKEN2
,
4865 _3D_CHICKEN2_WM_READ_PIPELINED
<< 16 |
4866 _3D_CHICKEN2_WM_READ_PIPELINED
);
4868 /* WaDisableRenderCachePipelinedFlush:ilk */
4869 I915_WRITE(CACHE_MODE_0
,
4870 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
4872 g4x_disable_trickle_feed(dev
);
4874 ibx_init_clock_gating(dev
);
4877 static void cpt_init_clock_gating(struct drm_device
*dev
)
4879 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4884 * On Ibex Peak and Cougar Point, we need to disable clock
4885 * gating for the panel power sequencer or it will fail to
4886 * start up when no ports are active.
4888 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
4889 I915_WRITE(SOUTH_CHICKEN2
, I915_READ(SOUTH_CHICKEN2
) |
4890 DPLS_EDP_PPS_FIX_DIS
);
4891 /* The below fixes the weird display corruption, a few pixels shifted
4892 * downward, on (only) LVDS of some HP laptops with IVY.
4894 for_each_pipe(pipe
) {
4895 val
= I915_READ(TRANS_CHICKEN2(pipe
));
4896 val
|= TRANS_CHICKEN2_TIMING_OVERRIDE
;
4897 val
&= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
4898 if (dev_priv
->vbt
.fdi_rx_polarity_inverted
)
4899 val
|= TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
4900 val
&= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK
;
4901 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER
;
4902 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH
;
4903 I915_WRITE(TRANS_CHICKEN2(pipe
), val
);
4905 /* WADP0ClockGatingDisable */
4906 for_each_pipe(pipe
) {
4907 I915_WRITE(TRANS_CHICKEN1(pipe
),
4908 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
4912 static void gen6_check_mch_setup(struct drm_device
*dev
)
4914 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4917 tmp
= I915_READ(MCH_SSKPD
);
4918 if ((tmp
& MCH_SSKPD_WM0_MASK
) != MCH_SSKPD_WM0_VAL
) {
4919 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp
);
4920 DRM_INFO("This can cause pipe underruns and display issues.\n");
4921 DRM_INFO("Please upgrade your BIOS to fix this.\n");
4925 static void gen6_init_clock_gating(struct drm_device
*dev
)
4927 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4928 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
4930 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
4932 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4933 I915_READ(ILK_DISPLAY_CHICKEN2
) |
4934 ILK_ELPIN_409_SELECT
);
4936 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
4937 I915_WRITE(_3D_CHICKEN
,
4938 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB
));
4940 /* WaSetupGtModeTdRowDispatch:snb */
4941 if (IS_SNB_GT1(dev
))
4942 I915_WRITE(GEN6_GT_MODE
,
4943 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE
));
4945 I915_WRITE(WM3_LP_ILK
, 0);
4946 I915_WRITE(WM2_LP_ILK
, 0);
4947 I915_WRITE(WM1_LP_ILK
, 0);
4949 I915_WRITE(CACHE_MODE_0
,
4950 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB
));
4952 I915_WRITE(GEN6_UCGCTL1
,
4953 I915_READ(GEN6_UCGCTL1
) |
4954 GEN6_BLBUNIT_CLOCK_GATE_DISABLE
|
4955 GEN6_CSUNIT_CLOCK_GATE_DISABLE
);
4957 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4958 * gating disable must be set. Failure to set it results in
4959 * flickering pixels due to Z write ordering failures after
4960 * some amount of runtime in the Mesa "fire" demo, and Unigine
4961 * Sanctuary and Tropics, and apparently anything else with
4962 * alpha test or pixel discard.
4964 * According to the spec, bit 11 (RCCUNIT) must also be set,
4965 * but we didn't debug actual testcases to find it out.
4967 * Also apply WaDisableVDSUnitClockGating:snb and
4968 * WaDisableRCPBUnitClockGating:snb.
4970 I915_WRITE(GEN6_UCGCTL2
,
4971 GEN7_VDSUNIT_CLOCK_GATE_DISABLE
|
4972 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
4973 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
4975 /* Bspec says we need to always set all mask bits. */
4976 I915_WRITE(_3D_CHICKEN3
, (0xFFFF << 16) |
4977 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL
);
4980 * According to the spec the following bits should be
4981 * set in order to enable memory self-refresh and fbc:
4982 * The bit21 and bit22 of 0x42000
4983 * The bit21 and bit22 of 0x42004
4984 * The bit5 and bit7 of 0x42020
4985 * The bit14 of 0x70180
4986 * The bit14 of 0x71180
4988 * WaFbcAsynchFlipDisableFbcQueue:snb
4990 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
4991 I915_READ(ILK_DISPLAY_CHICKEN1
) |
4992 ILK_FBCQ_DIS
| ILK_PABSTRETCH_DIS
);
4993 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4994 I915_READ(ILK_DISPLAY_CHICKEN2
) |
4995 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
);
4996 I915_WRITE(ILK_DSPCLK_GATE_D
,
4997 I915_READ(ILK_DSPCLK_GATE_D
) |
4998 ILK_DPARBUNIT_CLOCK_GATE_ENABLE
|
4999 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
);
5001 g4x_disable_trickle_feed(dev
);
5003 /* The default value should be 0x200 according to docs, but the two
5004 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
5005 I915_WRITE(GEN6_GT_MODE
, _MASKED_BIT_DISABLE(0xffff));
5006 I915_WRITE(GEN6_GT_MODE
, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI
));
5008 cpt_init_clock_gating(dev
);
5010 gen6_check_mch_setup(dev
);
5013 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private
*dev_priv
)
5015 uint32_t reg
= I915_READ(GEN7_FF_THREAD_MODE
);
5017 reg
&= ~GEN7_FF_SCHED_MASK
;
5018 reg
|= GEN7_FF_TS_SCHED_HW
;
5019 reg
|= GEN7_FF_VS_SCHED_HW
;
5020 reg
|= GEN7_FF_DS_SCHED_HW
;
5022 if (IS_HASWELL(dev_priv
->dev
))
5023 reg
&= ~GEN7_FF_VS_REF_CNT_FFME
;
5025 I915_WRITE(GEN7_FF_THREAD_MODE
, reg
);
5028 static void lpt_init_clock_gating(struct drm_device
*dev
)
5030 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5033 * TODO: this bit should only be enabled when really needed, then
5034 * disabled when not needed anymore in order to save power.
5036 if (dev_priv
->pch_id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
)
5037 I915_WRITE(SOUTH_DSPCLK_GATE_D
,
5038 I915_READ(SOUTH_DSPCLK_GATE_D
) |
5039 PCH_LP_PARTITION_LEVEL_DISABLE
);
5041 /* WADPOClockGatingDisable:hsw */
5042 I915_WRITE(_TRANSA_CHICKEN1
,
5043 I915_READ(_TRANSA_CHICKEN1
) |
5044 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
5047 static void lpt_suspend_hw(struct drm_device
*dev
)
5049 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5051 if (dev_priv
->pch_id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
) {
5052 uint32_t val
= I915_READ(SOUTH_DSPCLK_GATE_D
);
5054 val
&= ~PCH_LP_PARTITION_LEVEL_DISABLE
;
5055 I915_WRITE(SOUTH_DSPCLK_GATE_D
, val
);
5059 static void haswell_init_clock_gating(struct drm_device
*dev
)
5061 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5063 I915_WRITE(WM3_LP_ILK
, 0);
5064 I915_WRITE(WM2_LP_ILK
, 0);
5065 I915_WRITE(WM1_LP_ILK
, 0);
5067 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5068 * This implements the WaDisableRCZUnitClockGating:hsw workaround.
5070 I915_WRITE(GEN6_UCGCTL2
, GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
5072 /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */
5073 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5074 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5076 /* WaApplyL3ControlAndL3ChickenMode:hsw */
5077 I915_WRITE(GEN7_L3CNTLREG1
,
5078 GEN7_WA_FOR_GEN7_L3_CONTROL
);
5079 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
5080 GEN7_WA_L3_CHICKEN_MODE
);
5082 /* This is required by WaCatErrorRejectionIssue:hsw */
5083 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5084 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5085 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5087 /* WaVSRefCountFullforceMissDisable:hsw */
5088 gen7_setup_fixed_func_scheduler(dev_priv
);
5090 /* WaDisable4x2SubspanOptimization:hsw */
5091 I915_WRITE(CACHE_MODE_1
,
5092 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5094 /* WaSwitchSolVfFArbitrationPriority:hsw */
5095 I915_WRITE(GAM_ECOCHK
, I915_READ(GAM_ECOCHK
) | HSW_ECOCHK_ARB_PRIO_SOL
);
5097 /* WaRsPkgCStateDisplayPMReq:hsw */
5098 I915_WRITE(CHICKEN_PAR1_1
,
5099 I915_READ(CHICKEN_PAR1_1
) | FORCE_ARB_IDLE_PLANES
);
5101 lpt_init_clock_gating(dev
);
5104 static void ivybridge_init_clock_gating(struct drm_device
*dev
)
5106 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5109 I915_WRITE(WM3_LP_ILK
, 0);
5110 I915_WRITE(WM2_LP_ILK
, 0);
5111 I915_WRITE(WM1_LP_ILK
, 0);
5113 I915_WRITE(ILK_DSPCLK_GATE_D
, ILK_VRHUNIT_CLOCK_GATE_DISABLE
);
5115 /* WaDisableEarlyCull:ivb */
5116 I915_WRITE(_3D_CHICKEN3
,
5117 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
5119 /* WaDisableBackToBackFlipFix:ivb */
5120 I915_WRITE(IVB_CHICKEN3
,
5121 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
5122 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
5124 /* WaDisablePSDDualDispatchEnable:ivb */
5125 if (IS_IVB_GT1(dev
))
5126 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5127 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5129 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2
,
5130 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5132 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
5133 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5134 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5136 /* WaApplyL3ControlAndL3ChickenMode:ivb */
5137 I915_WRITE(GEN7_L3CNTLREG1
,
5138 GEN7_WA_FOR_GEN7_L3_CONTROL
);
5139 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
5140 GEN7_WA_L3_CHICKEN_MODE
);
5141 if (IS_IVB_GT1(dev
))
5142 I915_WRITE(GEN7_ROW_CHICKEN2
,
5143 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5145 I915_WRITE(GEN7_ROW_CHICKEN2_GT2
,
5146 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5149 /* WaForceL3Serialization:ivb */
5150 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
5151 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
5153 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5154 * gating disable must be set. Failure to set it results in
5155 * flickering pixels due to Z write ordering failures after
5156 * some amount of runtime in the Mesa "fire" demo, and Unigine
5157 * Sanctuary and Tropics, and apparently anything else with
5158 * alpha test or pixel discard.
5160 * According to the spec, bit 11 (RCCUNIT) must also be set,
5161 * but we didn't debug actual testcases to find it out.
5163 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5164 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
5166 I915_WRITE(GEN6_UCGCTL2
,
5167 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
|
5168 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5170 /* This is required by WaCatErrorRejectionIssue:ivb */
5171 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5172 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5173 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5175 g4x_disable_trickle_feed(dev
);
5177 /* WaVSRefCountFullforceMissDisable:ivb */
5178 gen7_setup_fixed_func_scheduler(dev_priv
);
5180 /* WaDisable4x2SubspanOptimization:ivb */
5181 I915_WRITE(CACHE_MODE_1
,
5182 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5184 snpcr
= I915_READ(GEN6_MBCUNIT_SNPCR
);
5185 snpcr
&= ~GEN6_MBC_SNPCR_MASK
;
5186 snpcr
|= GEN6_MBC_SNPCR_MED
;
5187 I915_WRITE(GEN6_MBCUNIT_SNPCR
, snpcr
);
5189 if (!HAS_PCH_NOP(dev
))
5190 cpt_init_clock_gating(dev
);
5192 gen6_check_mch_setup(dev
);
5195 static void valleyview_init_clock_gating(struct drm_device
*dev
)
5197 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5199 I915_WRITE(DSPCLK_GATE_D
, VRHUNIT_CLOCK_GATE_DISABLE
);
5201 /* WaDisableEarlyCull:vlv */
5202 I915_WRITE(_3D_CHICKEN3
,
5203 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
5205 /* WaDisableBackToBackFlipFix:vlv */
5206 I915_WRITE(IVB_CHICKEN3
,
5207 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
5208 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
5210 /* WaDisablePSDDualDispatchEnable:vlv */
5211 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5212 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP
|
5213 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5215 /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */
5216 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5217 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5219 /* WaApplyL3ControlAndL3ChickenMode:vlv */
5220 I915_WRITE(GEN7_L3CNTLREG1
, I915_READ(GEN7_L3CNTLREG1
) | GEN7_L3AGDIS
);
5221 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
, GEN7_WA_L3_CHICKEN_MODE
);
5223 /* WaForceL3Serialization:vlv */
5224 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
5225 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
5227 /* WaDisableDopClockGating:vlv */
5228 I915_WRITE(GEN7_ROW_CHICKEN2
,
5229 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5231 /* This is required by WaCatErrorRejectionIssue:vlv */
5232 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5233 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5234 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5236 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5237 * gating disable must be set. Failure to set it results in
5238 * flickering pixels due to Z write ordering failures after
5239 * some amount of runtime in the Mesa "fire" demo, and Unigine
5240 * Sanctuary and Tropics, and apparently anything else with
5241 * alpha test or pixel discard.
5243 * According to the spec, bit 11 (RCCUNIT) must also be set,
5244 * but we didn't debug actual testcases to find it out.
5246 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5247 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
5249 * Also apply WaDisableVDSUnitClockGating:vlv and
5250 * WaDisableRCPBUnitClockGating:vlv.
5252 I915_WRITE(GEN6_UCGCTL2
,
5253 GEN7_VDSUNIT_CLOCK_GATE_DISABLE
|
5254 GEN7_TDLUNIT_CLOCK_GATE_DISABLE
|
5255 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
|
5256 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
5257 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5259 I915_WRITE(GEN7_UCGCTL4
, GEN7_L3BANK2X_CLOCK_GATE_DISABLE
);
5261 I915_WRITE(MI_ARB_VLV
, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
);
5263 I915_WRITE(CACHE_MODE_1
,
5264 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5267 * WaDisableVLVClockGating_VBIIssue:vlv
5268 * Disable clock gating on th GCFG unit to prevent a delay
5269 * in the reporting of vblank events.
5271 I915_WRITE(VLV_GUNIT_CLOCK_GATE
, 0xffffffff);
5273 /* Conservative clock gating settings for now */
5274 I915_WRITE(0x9400, 0xffffffff);
5275 I915_WRITE(0x9404, 0xffffffff);
5276 I915_WRITE(0x9408, 0xffffffff);
5277 I915_WRITE(0x940c, 0xffffffff);
5278 I915_WRITE(0x9410, 0xffffffff);
5279 I915_WRITE(0x9414, 0xffffffff);
5280 I915_WRITE(0x9418, 0xffffffff);
5283 static void g4x_init_clock_gating(struct drm_device
*dev
)
5285 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5286 uint32_t dspclk_gate
;
5288 I915_WRITE(RENCLK_GATE_D1
, 0);
5289 I915_WRITE(RENCLK_GATE_D2
, VF_UNIT_CLOCK_GATE_DISABLE
|
5290 GS_UNIT_CLOCK_GATE_DISABLE
|
5291 CL_UNIT_CLOCK_GATE_DISABLE
);
5292 I915_WRITE(RAMCLK_GATE_D
, 0);
5293 dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
|
5294 OVRUNIT_CLOCK_GATE_DISABLE
|
5295 OVCUNIT_CLOCK_GATE_DISABLE
;
5297 dspclk_gate
|= DSSUNIT_CLOCK_GATE_DISABLE
;
5298 I915_WRITE(DSPCLK_GATE_D
, dspclk_gate
);
5300 /* WaDisableRenderCachePipelinedFlush */
5301 I915_WRITE(CACHE_MODE_0
,
5302 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
5304 g4x_disable_trickle_feed(dev
);
5307 static void crestline_init_clock_gating(struct drm_device
*dev
)
5309 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5311 I915_WRITE(RENCLK_GATE_D1
, I965_RCC_CLOCK_GATE_DISABLE
);
5312 I915_WRITE(RENCLK_GATE_D2
, 0);
5313 I915_WRITE(DSPCLK_GATE_D
, 0);
5314 I915_WRITE(RAMCLK_GATE_D
, 0);
5315 I915_WRITE16(DEUC
, 0);
5316 I915_WRITE(MI_ARB_STATE
,
5317 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
5320 static void broadwater_init_clock_gating(struct drm_device
*dev
)
5322 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5324 I915_WRITE(RENCLK_GATE_D1
, I965_RCZ_CLOCK_GATE_DISABLE
|
5325 I965_RCC_CLOCK_GATE_DISABLE
|
5326 I965_RCPB_CLOCK_GATE_DISABLE
|
5327 I965_ISC_CLOCK_GATE_DISABLE
|
5328 I965_FBC_CLOCK_GATE_DISABLE
);
5329 I915_WRITE(RENCLK_GATE_D2
, 0);
5330 I915_WRITE(MI_ARB_STATE
,
5331 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
5334 static void gen3_init_clock_gating(struct drm_device
*dev
)
5336 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5337 u32 dstate
= I915_READ(D_STATE
);
5339 dstate
|= DSTATE_PLL_D3_OFF
| DSTATE_GFX_CLOCK_GATING
|
5340 DSTATE_DOT_CLOCK_GATING
;
5341 I915_WRITE(D_STATE
, dstate
);
5343 if (IS_PINEVIEW(dev
))
5344 I915_WRITE(ECOSKPD
, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY
));
5346 /* IIR "flip pending" means done if this bit is set */
5347 I915_WRITE(ECOSKPD
, _MASKED_BIT_DISABLE(ECO_FLIP_DONE
));
5350 static void i85x_init_clock_gating(struct drm_device
*dev
)
5352 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5354 I915_WRITE(RENCLK_GATE_D1
, SV_CLOCK_GATE_DISABLE
);
5357 static void i830_init_clock_gating(struct drm_device
*dev
)
5359 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5361 I915_WRITE(DSPCLK_GATE_D
, OVRUNIT_CLOCK_GATE_DISABLE
);
5364 void intel_init_clock_gating(struct drm_device
*dev
)
5366 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5368 dev_priv
->display
.init_clock_gating(dev
);
5371 void intel_suspend_hw(struct drm_device
*dev
)
5373 if (HAS_PCH_LPT(dev
))
5374 lpt_suspend_hw(dev
);
5378 * We should only use the power well if we explicitly asked the hardware to
5379 * enable it, so check if it's enabled and also check if we've requested it to
5382 bool intel_display_power_enabled(struct drm_device
*dev
,
5383 enum intel_display_power_domain domain
)
5385 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5387 if (!HAS_POWER_WELL(dev
))
5391 case POWER_DOMAIN_PIPE_A
:
5392 case POWER_DOMAIN_TRANSCODER_EDP
:
5394 case POWER_DOMAIN_VGA
:
5395 case POWER_DOMAIN_PIPE_B
:
5396 case POWER_DOMAIN_PIPE_C
:
5397 case POWER_DOMAIN_PIPE_A_PANEL_FITTER
:
5398 case POWER_DOMAIN_PIPE_B_PANEL_FITTER
:
5399 case POWER_DOMAIN_PIPE_C_PANEL_FITTER
:
5400 case POWER_DOMAIN_TRANSCODER_A
:
5401 case POWER_DOMAIN_TRANSCODER_B
:
5402 case POWER_DOMAIN_TRANSCODER_C
:
5403 return I915_READ(HSW_PWR_WELL_DRIVER
) ==
5404 (HSW_PWR_WELL_ENABLE_REQUEST
| HSW_PWR_WELL_STATE_ENABLED
);
5410 static void __intel_set_power_well(struct drm_device
*dev
, bool enable
)
5412 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5413 bool is_enabled
, enable_requested
;
5416 tmp
= I915_READ(HSW_PWR_WELL_DRIVER
);
5417 is_enabled
= tmp
& HSW_PWR_WELL_STATE_ENABLED
;
5418 enable_requested
= tmp
& HSW_PWR_WELL_ENABLE_REQUEST
;
5421 if (!enable_requested
)
5422 I915_WRITE(HSW_PWR_WELL_DRIVER
,
5423 HSW_PWR_WELL_ENABLE_REQUEST
);
5426 DRM_DEBUG_KMS("Enabling power well\n");
5427 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER
) &
5428 HSW_PWR_WELL_STATE_ENABLED
), 20))
5429 DRM_ERROR("Timeout enabling power well\n");
5432 if (enable_requested
) {
5433 unsigned long irqflags
;
5436 I915_WRITE(HSW_PWR_WELL_DRIVER
, 0);
5437 POSTING_READ(HSW_PWR_WELL_DRIVER
);
5438 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5441 * After this, the registers on the pipes that are part
5442 * of the power well will become zero, so we have to
5443 * adjust our counters according to that.
5445 * FIXME: Should we do this in general in
5446 * drm_vblank_post_modeset?
5448 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
5451 dev
->vblank
[p
].last
= 0;
5452 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
5457 static void __intel_power_well_get(struct i915_power_well
*power_well
)
5459 if (!power_well
->count
++)
5460 __intel_set_power_well(power_well
->device
, true);
5463 static void __intel_power_well_put(struct i915_power_well
*power_well
)
5465 WARN_ON(!power_well
->count
);
5466 if (!--power_well
->count
)
5467 __intel_set_power_well(power_well
->device
, false);
5470 void intel_display_power_get(struct drm_device
*dev
,
5471 enum intel_display_power_domain domain
)
5473 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5474 struct i915_power_well
*power_well
= &dev_priv
->power_well
;
5476 if (!HAS_POWER_WELL(dev
))
5480 case POWER_DOMAIN_PIPE_A
:
5481 case POWER_DOMAIN_TRANSCODER_EDP
:
5483 case POWER_DOMAIN_VGA
:
5484 case POWER_DOMAIN_PIPE_B
:
5485 case POWER_DOMAIN_PIPE_C
:
5486 case POWER_DOMAIN_PIPE_A_PANEL_FITTER
:
5487 case POWER_DOMAIN_PIPE_B_PANEL_FITTER
:
5488 case POWER_DOMAIN_PIPE_C_PANEL_FITTER
:
5489 case POWER_DOMAIN_TRANSCODER_A
:
5490 case POWER_DOMAIN_TRANSCODER_B
:
5491 case POWER_DOMAIN_TRANSCODER_C
:
5492 spin_lock_irq(&power_well
->lock
);
5493 __intel_power_well_get(power_well
);
5494 spin_unlock_irq(&power_well
->lock
);
5501 void intel_display_power_put(struct drm_device
*dev
,
5502 enum intel_display_power_domain domain
)
5504 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5505 struct i915_power_well
*power_well
= &dev_priv
->power_well
;
5507 if (!HAS_POWER_WELL(dev
))
5511 case POWER_DOMAIN_PIPE_A
:
5512 case POWER_DOMAIN_TRANSCODER_EDP
:
5514 case POWER_DOMAIN_VGA
:
5515 case POWER_DOMAIN_PIPE_B
:
5516 case POWER_DOMAIN_PIPE_C
:
5517 case POWER_DOMAIN_PIPE_A_PANEL_FITTER
:
5518 case POWER_DOMAIN_PIPE_B_PANEL_FITTER
:
5519 case POWER_DOMAIN_PIPE_C_PANEL_FITTER
:
5520 case POWER_DOMAIN_TRANSCODER_A
:
5521 case POWER_DOMAIN_TRANSCODER_B
:
5522 case POWER_DOMAIN_TRANSCODER_C
:
5523 spin_lock_irq(&power_well
->lock
);
5524 __intel_power_well_put(power_well
);
5525 spin_unlock_irq(&power_well
->lock
);
5532 static struct i915_power_well
*hsw_pwr
;
5534 /* Display audio driver power well request */
5535 void i915_request_power_well(void)
5537 if (WARN_ON(!hsw_pwr
))
5540 spin_lock_irq(&hsw_pwr
->lock
);
5541 __intel_power_well_get(hsw_pwr
);
5542 spin_unlock_irq(&hsw_pwr
->lock
);
5544 EXPORT_SYMBOL_GPL(i915_request_power_well
);
5546 /* Display audio driver power well release */
5547 void i915_release_power_well(void)
5549 if (WARN_ON(!hsw_pwr
))
5552 spin_lock_irq(&hsw_pwr
->lock
);
5553 __intel_power_well_put(hsw_pwr
);
5554 spin_unlock_irq(&hsw_pwr
->lock
);
5556 EXPORT_SYMBOL_GPL(i915_release_power_well
);
5558 int i915_init_power_well(struct drm_device
*dev
)
5560 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5562 hsw_pwr
= &dev_priv
->power_well
;
5564 hsw_pwr
->device
= dev
;
5565 spin_lock_init(&hsw_pwr
->lock
);
5571 void i915_remove_power_well(struct drm_device
*dev
)
5576 void intel_set_power_well(struct drm_device
*dev
, bool enable
)
5578 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5579 struct i915_power_well
*power_well
= &dev_priv
->power_well
;
5581 if (!HAS_POWER_WELL(dev
))
5584 if (!i915_disable_power_well
&& !enable
)
5587 spin_lock_irq(&power_well
->lock
);
5590 * This function will only ever contribute one
5591 * to the power well reference count. i915_request
5592 * is what tracks whether we have or have not
5593 * added the one to the reference count.
5595 if (power_well
->i915_request
== enable
)
5598 power_well
->i915_request
= enable
;
5601 __intel_power_well_get(power_well
);
5603 __intel_power_well_put(power_well
);
5606 spin_unlock_irq(&power_well
->lock
);
5609 static void intel_resume_power_well(struct drm_device
*dev
)
5611 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5612 struct i915_power_well
*power_well
= &dev_priv
->power_well
;
5614 if (!HAS_POWER_WELL(dev
))
5617 spin_lock_irq(&power_well
->lock
);
5618 __intel_set_power_well(dev
, power_well
->count
> 0);
5619 spin_unlock_irq(&power_well
->lock
);
5623 * Starting with Haswell, we have a "Power Down Well" that can be turned off
5624 * when not needed anymore. We have 4 registers that can request the power well
5625 * to be enabled, and it will only be disabled if none of the registers is
5626 * requesting it to be enabled.
5628 void intel_init_power_well(struct drm_device
*dev
)
5630 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5632 if (!HAS_POWER_WELL(dev
))
5635 /* For now, we need the power well to be always enabled. */
5636 intel_set_power_well(dev
, true);
5637 intel_resume_power_well(dev
);
5639 /* We're taking over the BIOS, so clear any requests made by it since
5640 * the driver is in charge now. */
5641 if (I915_READ(HSW_PWR_WELL_BIOS
) & HSW_PWR_WELL_ENABLE_REQUEST
)
5642 I915_WRITE(HSW_PWR_WELL_BIOS
, 0);
5645 /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */
5646 void intel_aux_display_runtime_get(struct drm_i915_private
*dev_priv
)
5648 hsw_disable_package_c8(dev_priv
);
5651 void intel_aux_display_runtime_put(struct drm_i915_private
*dev_priv
)
5653 hsw_enable_package_c8(dev_priv
);
5656 /* Set up chip specific power management-related functions */
5657 void intel_init_pm(struct drm_device
*dev
)
5659 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5661 if (I915_HAS_FBC(dev
)) {
5662 if (HAS_PCH_SPLIT(dev
)) {
5663 dev_priv
->display
.fbc_enabled
= ironlake_fbc_enabled
;
5664 if (IS_IVYBRIDGE(dev
) || IS_HASWELL(dev
))
5665 dev_priv
->display
.enable_fbc
=
5668 dev_priv
->display
.enable_fbc
=
5669 ironlake_enable_fbc
;
5670 dev_priv
->display
.disable_fbc
= ironlake_disable_fbc
;
5671 } else if (IS_GM45(dev
)) {
5672 dev_priv
->display
.fbc_enabled
= g4x_fbc_enabled
;
5673 dev_priv
->display
.enable_fbc
= g4x_enable_fbc
;
5674 dev_priv
->display
.disable_fbc
= g4x_disable_fbc
;
5675 } else if (IS_CRESTLINE(dev
)) {
5676 dev_priv
->display
.fbc_enabled
= i8xx_fbc_enabled
;
5677 dev_priv
->display
.enable_fbc
= i8xx_enable_fbc
;
5678 dev_priv
->display
.disable_fbc
= i8xx_disable_fbc
;
5680 /* 855GM needs testing */
5684 if (IS_PINEVIEW(dev
))
5685 i915_pineview_get_mem_freq(dev
);
5686 else if (IS_GEN5(dev
))
5687 i915_ironlake_get_mem_freq(dev
);
5689 /* For FIFO watermark updates */
5690 if (HAS_PCH_SPLIT(dev
)) {
5691 intel_setup_wm_latency(dev
);
5694 if (dev_priv
->wm
.pri_latency
[1] &&
5695 dev_priv
->wm
.spr_latency
[1] &&
5696 dev_priv
->wm
.cur_latency
[1])
5697 dev_priv
->display
.update_wm
= ironlake_update_wm
;
5699 DRM_DEBUG_KMS("Failed to get proper latency. "
5701 dev_priv
->display
.update_wm
= NULL
;
5703 dev_priv
->display
.init_clock_gating
= ironlake_init_clock_gating
;
5704 } else if (IS_GEN6(dev
)) {
5705 if (dev_priv
->wm
.pri_latency
[0] &&
5706 dev_priv
->wm
.spr_latency
[0] &&
5707 dev_priv
->wm
.cur_latency
[0]) {
5708 dev_priv
->display
.update_wm
= sandybridge_update_wm
;
5709 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
5711 DRM_DEBUG_KMS("Failed to read display plane latency. "
5713 dev_priv
->display
.update_wm
= NULL
;
5715 dev_priv
->display
.init_clock_gating
= gen6_init_clock_gating
;
5716 } else if (IS_IVYBRIDGE(dev
)) {
5717 if (dev_priv
->wm
.pri_latency
[0] &&
5718 dev_priv
->wm
.spr_latency
[0] &&
5719 dev_priv
->wm
.cur_latency
[0]) {
5720 dev_priv
->display
.update_wm
= ivybridge_update_wm
;
5721 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
5723 DRM_DEBUG_KMS("Failed to read display plane latency. "
5725 dev_priv
->display
.update_wm
= NULL
;
5727 dev_priv
->display
.init_clock_gating
= ivybridge_init_clock_gating
;
5728 } else if (IS_HASWELL(dev
)) {
5729 if (dev_priv
->wm
.pri_latency
[0] &&
5730 dev_priv
->wm
.spr_latency
[0] &&
5731 dev_priv
->wm
.cur_latency
[0]) {
5732 dev_priv
->display
.update_wm
= haswell_update_wm
;
5733 dev_priv
->display
.update_sprite_wm
=
5734 haswell_update_sprite_wm
;
5736 DRM_DEBUG_KMS("Failed to read display plane latency. "
5738 dev_priv
->display
.update_wm
= NULL
;
5740 dev_priv
->display
.init_clock_gating
= haswell_init_clock_gating
;
5742 dev_priv
->display
.update_wm
= NULL
;
5743 } else if (IS_VALLEYVIEW(dev
)) {
5744 dev_priv
->display
.update_wm
= valleyview_update_wm
;
5745 dev_priv
->display
.init_clock_gating
=
5746 valleyview_init_clock_gating
;
5747 } else if (IS_PINEVIEW(dev
)) {
5748 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev
),
5751 dev_priv
->mem_freq
)) {
5752 DRM_INFO("failed to find known CxSR latency "
5753 "(found ddr%s fsb freq %d, mem freq %d), "
5755 (dev_priv
->is_ddr3
== 1) ? "3" : "2",
5756 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
5757 /* Disable CxSR and never update its watermark again */
5758 pineview_disable_cxsr(dev
);
5759 dev_priv
->display
.update_wm
= NULL
;
5761 dev_priv
->display
.update_wm
= pineview_update_wm
;
5762 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
5763 } else if (IS_G4X(dev
)) {
5764 dev_priv
->display
.update_wm
= g4x_update_wm
;
5765 dev_priv
->display
.init_clock_gating
= g4x_init_clock_gating
;
5766 } else if (IS_GEN4(dev
)) {
5767 dev_priv
->display
.update_wm
= i965_update_wm
;
5768 if (IS_CRESTLINE(dev
))
5769 dev_priv
->display
.init_clock_gating
= crestline_init_clock_gating
;
5770 else if (IS_BROADWATER(dev
))
5771 dev_priv
->display
.init_clock_gating
= broadwater_init_clock_gating
;
5772 } else if (IS_GEN3(dev
)) {
5773 dev_priv
->display
.update_wm
= i9xx_update_wm
;
5774 dev_priv
->display
.get_fifo_size
= i9xx_get_fifo_size
;
5775 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
5776 } else if (IS_I865G(dev
)) {
5777 dev_priv
->display
.update_wm
= i830_update_wm
;
5778 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
5779 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
5780 } else if (IS_I85X(dev
)) {
5781 dev_priv
->display
.update_wm
= i9xx_update_wm
;
5782 dev_priv
->display
.get_fifo_size
= i85x_get_fifo_size
;
5783 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
5785 dev_priv
->display
.update_wm
= i830_update_wm
;
5786 dev_priv
->display
.init_clock_gating
= i830_init_clock_gating
;
5788 dev_priv
->display
.get_fifo_size
= i845_get_fifo_size
;
5790 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
5794 int sandybridge_pcode_read(struct drm_i915_private
*dev_priv
, u8 mbox
, u32
*val
)
5796 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5798 if (I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
5799 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
5803 I915_WRITE(GEN6_PCODE_DATA
, *val
);
5804 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
5806 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
5808 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox
);
5812 *val
= I915_READ(GEN6_PCODE_DATA
);
5813 I915_WRITE(GEN6_PCODE_DATA
, 0);
5818 int sandybridge_pcode_write(struct drm_i915_private
*dev_priv
, u8 mbox
, u32 val
)
5820 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5822 if (I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
5823 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
5827 I915_WRITE(GEN6_PCODE_DATA
, val
);
5828 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
5830 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
5832 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox
);
5836 I915_WRITE(GEN6_PCODE_DATA
, 0);
5841 int vlv_gpu_freq(int ddr_freq
, int val
)
5862 return ((val
- 0xbd) * mult
) + base
;
5865 int vlv_freq_opcode(int ddr_freq
, int val
)
5896 void intel_pm_init(struct drm_device
*dev
)
5898 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5900 INIT_DELAYED_WORK(&dev_priv
->rps
.delayed_resume_work
,
5901 intel_gen6_powersave_work
);