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>
36 * RC6 is a special power stage which allows the GPU to enter an very
37 * low-voltage mode when idle, using down to 0V while at this stage. This
38 * stage is entered automatically when the GPU is idle when RC6 support is
39 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
41 * There are different RC6 modes available in Intel GPU, which differentiate
42 * among each other with the latency required to enter and leave RC6 and
43 * voltage consumed by the GPU in different states.
45 * The combination of the following flags define which states GPU is allowed
46 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
47 * RC6pp is deepest RC6. Their support by hardware varies according to the
48 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
49 * which brings the most power savings; deeper states save more power, but
50 * require higher latency to switch to and wake up.
52 #define INTEL_RC6_ENABLE (1<<0)
53 #define INTEL_RC6p_ENABLE (1<<1)
54 #define INTEL_RC6pp_ENABLE (1<<2)
56 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
57 * framebuffer contents in-memory, aiming at reducing the required bandwidth
58 * during in-memory transfers and, therefore, reduce the power packet.
60 * The benefits of FBC are mostly visible with solid backgrounds and
61 * variation-less patterns.
63 * FBC-related functionality can be enabled by the means of the
64 * i915.i915_enable_fbc parameter
67 static void i8xx_disable_fbc(struct drm_device
*dev
)
69 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
72 /* Disable compression */
73 fbc_ctl
= I915_READ(FBC_CONTROL
);
74 if ((fbc_ctl
& FBC_CTL_EN
) == 0)
77 fbc_ctl
&= ~FBC_CTL_EN
;
78 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
80 /* Wait for compressing bit to clear */
81 if (wait_for((I915_READ(FBC_STATUS
) & FBC_STAT_COMPRESSING
) == 0, 10)) {
82 DRM_DEBUG_KMS("FBC idle timed out\n");
86 DRM_DEBUG_KMS("disabled FBC\n");
89 static void i8xx_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
91 struct drm_device
*dev
= crtc
->dev
;
92 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
93 struct drm_framebuffer
*fb
= crtc
->fb
;
94 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
95 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
96 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
99 u32 fbc_ctl
, fbc_ctl2
;
101 cfb_pitch
= dev_priv
->fbc
.size
/ FBC_LL_SIZE
;
102 if (fb
->pitches
[0] < cfb_pitch
)
103 cfb_pitch
= fb
->pitches
[0];
105 /* FBC_CTL wants 64B units */
106 cfb_pitch
= (cfb_pitch
/ 64) - 1;
107 plane
= intel_crtc
->plane
== 0 ? FBC_CTL_PLANEA
: FBC_CTL_PLANEB
;
110 for (i
= 0; i
< (FBC_LL_SIZE
/ 32) + 1; i
++)
111 I915_WRITE(FBC_TAG
+ (i
* 4), 0);
114 fbc_ctl2
= FBC_CTL_FENCE_DBL
| FBC_CTL_IDLE_IMM
| FBC_CTL_CPU_FENCE
;
116 I915_WRITE(FBC_CONTROL2
, fbc_ctl2
);
117 I915_WRITE(FBC_FENCE_OFF
, crtc
->y
);
120 fbc_ctl
= FBC_CTL_EN
| FBC_CTL_PERIODIC
;
122 fbc_ctl
|= FBC_CTL_C3_IDLE
; /* 945 needs special SR handling */
123 fbc_ctl
|= (cfb_pitch
& 0xff) << FBC_CTL_STRIDE_SHIFT
;
124 fbc_ctl
|= (interval
& 0x2fff) << FBC_CTL_INTERVAL_SHIFT
;
125 fbc_ctl
|= obj
->fence_reg
;
126 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
128 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ",
129 cfb_pitch
, crtc
->y
, plane_name(intel_crtc
->plane
));
132 static bool i8xx_fbc_enabled(struct drm_device
*dev
)
134 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
136 return I915_READ(FBC_CONTROL
) & FBC_CTL_EN
;
139 static void g4x_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
141 struct drm_device
*dev
= crtc
->dev
;
142 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
143 struct drm_framebuffer
*fb
= crtc
->fb
;
144 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
145 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
146 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
147 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
148 unsigned long stall_watermark
= 200;
151 dpfc_ctl
= plane
| DPFC_SR_EN
| DPFC_CTL_LIMIT_1X
;
152 dpfc_ctl
|= DPFC_CTL_FENCE_EN
| obj
->fence_reg
;
153 I915_WRITE(DPFC_CHICKEN
, DPFC_HT_MODIFY
);
155 I915_WRITE(DPFC_RECOMP_CTL
, DPFC_RECOMP_STALL_EN
|
156 (stall_watermark
<< DPFC_RECOMP_STALL_WM_SHIFT
) |
157 (interval
<< DPFC_RECOMP_TIMER_COUNT_SHIFT
));
158 I915_WRITE(DPFC_FENCE_YOFF
, crtc
->y
);
161 I915_WRITE(DPFC_CONTROL
, I915_READ(DPFC_CONTROL
) | DPFC_CTL_EN
);
163 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
166 static void g4x_disable_fbc(struct drm_device
*dev
)
168 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
171 /* Disable compression */
172 dpfc_ctl
= I915_READ(DPFC_CONTROL
);
173 if (dpfc_ctl
& DPFC_CTL_EN
) {
174 dpfc_ctl
&= ~DPFC_CTL_EN
;
175 I915_WRITE(DPFC_CONTROL
, dpfc_ctl
);
177 DRM_DEBUG_KMS("disabled FBC\n");
181 static bool g4x_fbc_enabled(struct drm_device
*dev
)
183 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
185 return I915_READ(DPFC_CONTROL
) & DPFC_CTL_EN
;
188 static void sandybridge_blit_fbc_update(struct drm_device
*dev
)
190 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
193 /* Make sure blitter notifies FBC of writes */
194 gen6_gt_force_wake_get(dev_priv
);
195 blt_ecoskpd
= I915_READ(GEN6_BLITTER_ECOSKPD
);
196 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
<<
197 GEN6_BLITTER_LOCK_SHIFT
;
198 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
199 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
;
200 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
201 blt_ecoskpd
&= ~(GEN6_BLITTER_FBC_NOTIFY
<<
202 GEN6_BLITTER_LOCK_SHIFT
);
203 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
204 POSTING_READ(GEN6_BLITTER_ECOSKPD
);
205 gen6_gt_force_wake_put(dev_priv
);
208 static void ironlake_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
210 struct drm_device
*dev
= crtc
->dev
;
211 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
212 struct drm_framebuffer
*fb
= crtc
->fb
;
213 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
214 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
215 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
216 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
217 unsigned long stall_watermark
= 200;
220 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
221 dpfc_ctl
&= DPFC_RESERVED
;
222 dpfc_ctl
|= (plane
| DPFC_CTL_LIMIT_1X
);
223 /* Set persistent mode for front-buffer rendering, ala X. */
224 dpfc_ctl
|= DPFC_CTL_PERSISTENT_MODE
;
225 dpfc_ctl
|= (DPFC_CTL_FENCE_EN
| obj
->fence_reg
);
226 I915_WRITE(ILK_DPFC_CHICKEN
, DPFC_HT_MODIFY
);
228 I915_WRITE(ILK_DPFC_RECOMP_CTL
, DPFC_RECOMP_STALL_EN
|
229 (stall_watermark
<< DPFC_RECOMP_STALL_WM_SHIFT
) |
230 (interval
<< DPFC_RECOMP_TIMER_COUNT_SHIFT
));
231 I915_WRITE(ILK_DPFC_FENCE_YOFF
, crtc
->y
);
232 I915_WRITE(ILK_FBC_RT_BASE
, i915_gem_obj_ggtt_offset(obj
) | ILK_FBC_RT_VALID
);
234 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
| DPFC_CTL_EN
);
237 I915_WRITE(SNB_DPFC_CTL_SA
,
238 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
239 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
240 sandybridge_blit_fbc_update(dev
);
243 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
246 static void ironlake_disable_fbc(struct drm_device
*dev
)
248 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
251 /* Disable compression */
252 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
253 if (dpfc_ctl
& DPFC_CTL_EN
) {
254 dpfc_ctl
&= ~DPFC_CTL_EN
;
255 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
);
257 DRM_DEBUG_KMS("disabled FBC\n");
261 static bool ironlake_fbc_enabled(struct drm_device
*dev
)
263 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
265 return I915_READ(ILK_DPFC_CONTROL
) & DPFC_CTL_EN
;
268 static void gen7_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
270 struct drm_device
*dev
= crtc
->dev
;
271 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
272 struct drm_framebuffer
*fb
= crtc
->fb
;
273 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
274 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
275 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
277 I915_WRITE(IVB_FBC_RT_BASE
, i915_gem_obj_ggtt_offset(obj
));
279 I915_WRITE(ILK_DPFC_CONTROL
, DPFC_CTL_EN
| DPFC_CTL_LIMIT_1X
|
280 IVB_DPFC_CTL_FENCE_EN
|
281 intel_crtc
->plane
<< IVB_DPFC_CTL_PLANE_SHIFT
);
283 if (IS_IVYBRIDGE(dev
)) {
284 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
285 I915_WRITE(ILK_DISPLAY_CHICKEN1
, ILK_FBCQ_DIS
);
287 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
288 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc
->pipe
),
289 HSW_BYPASS_FBC_QUEUE
);
292 I915_WRITE(SNB_DPFC_CTL_SA
,
293 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
294 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
296 sandybridge_blit_fbc_update(dev
);
298 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc
->plane
);
301 bool intel_fbc_enabled(struct drm_device
*dev
)
303 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
305 if (!dev_priv
->display
.fbc_enabled
)
308 return dev_priv
->display
.fbc_enabled(dev
);
311 static void intel_fbc_work_fn(struct work_struct
*__work
)
313 struct intel_fbc_work
*work
=
314 container_of(to_delayed_work(__work
),
315 struct intel_fbc_work
, work
);
316 struct drm_device
*dev
= work
->crtc
->dev
;
317 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
319 mutex_lock(&dev
->struct_mutex
);
320 if (work
== dev_priv
->fbc
.fbc_work
) {
321 /* Double check that we haven't switched fb without cancelling
324 if (work
->crtc
->fb
== work
->fb
) {
325 dev_priv
->display
.enable_fbc(work
->crtc
,
328 dev_priv
->fbc
.plane
= to_intel_crtc(work
->crtc
)->plane
;
329 dev_priv
->fbc
.fb_id
= work
->crtc
->fb
->base
.id
;
330 dev_priv
->fbc
.y
= work
->crtc
->y
;
333 dev_priv
->fbc
.fbc_work
= NULL
;
335 mutex_unlock(&dev
->struct_mutex
);
340 static void intel_cancel_fbc_work(struct drm_i915_private
*dev_priv
)
342 if (dev_priv
->fbc
.fbc_work
== NULL
)
345 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
347 /* Synchronisation is provided by struct_mutex and checking of
348 * dev_priv->fbc.fbc_work, so we can perform the cancellation
349 * entirely asynchronously.
351 if (cancel_delayed_work(&dev_priv
->fbc
.fbc_work
->work
))
352 /* tasklet was killed before being run, clean up */
353 kfree(dev_priv
->fbc
.fbc_work
);
355 /* Mark the work as no longer wanted so that if it does
356 * wake-up (because the work was already running and waiting
357 * for our mutex), it will discover that is no longer
360 dev_priv
->fbc
.fbc_work
= NULL
;
363 static void intel_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
365 struct intel_fbc_work
*work
;
366 struct drm_device
*dev
= crtc
->dev
;
367 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
369 if (!dev_priv
->display
.enable_fbc
)
372 intel_cancel_fbc_work(dev_priv
);
374 work
= kzalloc(sizeof(*work
), GFP_KERNEL
);
376 DRM_ERROR("Failed to allocate FBC work structure\n");
377 dev_priv
->display
.enable_fbc(crtc
, interval
);
383 work
->interval
= interval
;
384 INIT_DELAYED_WORK(&work
->work
, intel_fbc_work_fn
);
386 dev_priv
->fbc
.fbc_work
= work
;
388 /* Delay the actual enabling to let pageflipping cease and the
389 * display to settle before starting the compression. Note that
390 * this delay also serves a second purpose: it allows for a
391 * vblank to pass after disabling the FBC before we attempt
392 * to modify the control registers.
394 * A more complicated solution would involve tracking vblanks
395 * following the termination of the page-flipping sequence
396 * and indeed performing the enable as a co-routine and not
397 * waiting synchronously upon the vblank.
399 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
401 schedule_delayed_work(&work
->work
, msecs_to_jiffies(50));
404 void intel_disable_fbc(struct drm_device
*dev
)
406 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
408 intel_cancel_fbc_work(dev_priv
);
410 if (!dev_priv
->display
.disable_fbc
)
413 dev_priv
->display
.disable_fbc(dev
);
414 dev_priv
->fbc
.plane
= -1;
417 static bool set_no_fbc_reason(struct drm_i915_private
*dev_priv
,
418 enum no_fbc_reason reason
)
420 if (dev_priv
->fbc
.no_fbc_reason
== reason
)
423 dev_priv
->fbc
.no_fbc_reason
= reason
;
428 * intel_update_fbc - enable/disable FBC as needed
429 * @dev: the drm_device
431 * Set up the framebuffer compression hardware at mode set time. We
432 * enable it if possible:
433 * - plane A only (on pre-965)
434 * - no pixel mulitply/line duplication
435 * - no alpha buffer discard
437 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
439 * We can't assume that any compression will take place (worst case),
440 * so the compressed buffer has to be the same size as the uncompressed
441 * one. It also must reside (along with the line length buffer) in
444 * We need to enable/disable FBC on a global basis.
446 void intel_update_fbc(struct drm_device
*dev
)
448 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
449 struct drm_crtc
*crtc
= NULL
, *tmp_crtc
;
450 struct intel_crtc
*intel_crtc
;
451 struct drm_framebuffer
*fb
;
452 struct intel_framebuffer
*intel_fb
;
453 struct drm_i915_gem_object
*obj
;
454 const struct drm_display_mode
*adjusted_mode
;
455 unsigned int max_width
, max_height
;
457 if (!I915_HAS_FBC(dev
)) {
458 set_no_fbc_reason(dev_priv
, FBC_UNSUPPORTED
);
462 if (!i915_powersave
) {
463 if (set_no_fbc_reason(dev_priv
, FBC_MODULE_PARAM
))
464 DRM_DEBUG_KMS("fbc disabled per module param\n");
469 * If FBC is already on, we just have to verify that we can
470 * keep it that way...
471 * Need to disable if:
472 * - more than one pipe is active
473 * - changing FBC params (stride, fence, mode)
474 * - new fb is too large to fit in compressed buffer
475 * - going to an unsupported config (interlace, pixel multiply, etc.)
477 list_for_each_entry(tmp_crtc
, &dev
->mode_config
.crtc_list
, head
) {
478 if (intel_crtc_active(tmp_crtc
) &&
479 to_intel_crtc(tmp_crtc
)->primary_enabled
) {
481 if (set_no_fbc_reason(dev_priv
, FBC_MULTIPLE_PIPES
))
482 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
489 if (!crtc
|| crtc
->fb
== NULL
) {
490 if (set_no_fbc_reason(dev_priv
, FBC_NO_OUTPUT
))
491 DRM_DEBUG_KMS("no output, disabling\n");
495 intel_crtc
= to_intel_crtc(crtc
);
497 intel_fb
= to_intel_framebuffer(fb
);
499 adjusted_mode
= &intel_crtc
->config
.adjusted_mode
;
501 if (i915_enable_fbc
< 0 &&
502 INTEL_INFO(dev
)->gen
<= 7 && !IS_HASWELL(dev
)) {
503 if (set_no_fbc_reason(dev_priv
, FBC_CHIP_DEFAULT
))
504 DRM_DEBUG_KMS("disabled per chip default\n");
507 if (!i915_enable_fbc
) {
508 if (set_no_fbc_reason(dev_priv
, FBC_MODULE_PARAM
))
509 DRM_DEBUG_KMS("fbc disabled per module param\n");
512 if ((adjusted_mode
->flags
& DRM_MODE_FLAG_INTERLACE
) ||
513 (adjusted_mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)) {
514 if (set_no_fbc_reason(dev_priv
, FBC_UNSUPPORTED_MODE
))
515 DRM_DEBUG_KMS("mode incompatible with compression, "
520 if (IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
527 if (intel_crtc
->config
.pipe_src_w
> max_width
||
528 intel_crtc
->config
.pipe_src_h
> max_height
) {
529 if (set_no_fbc_reason(dev_priv
, FBC_MODE_TOO_LARGE
))
530 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
533 if ((IS_I915GM(dev
) || IS_I945GM(dev
) || IS_HASWELL(dev
)) &&
534 intel_crtc
->plane
!= 0) {
535 if (set_no_fbc_reason(dev_priv
, FBC_BAD_PLANE
))
536 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
540 /* The use of a CPU fence is mandatory in order to detect writes
541 * by the CPU to the scanout and trigger updates to the FBC.
543 if (obj
->tiling_mode
!= I915_TILING_X
||
544 obj
->fence_reg
== I915_FENCE_REG_NONE
) {
545 if (set_no_fbc_reason(dev_priv
, FBC_NOT_TILED
))
546 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
550 /* If the kernel debugger is active, always disable compression */
554 if (i915_gem_stolen_setup_compression(dev
, intel_fb
->obj
->base
.size
)) {
555 if (set_no_fbc_reason(dev_priv
, FBC_STOLEN_TOO_SMALL
))
556 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
560 /* If the scanout has not changed, don't modify the FBC settings.
561 * Note that we make the fundamental assumption that the fb->obj
562 * cannot be unpinned (and have its GTT offset and fence revoked)
563 * without first being decoupled from the scanout and FBC disabled.
565 if (dev_priv
->fbc
.plane
== intel_crtc
->plane
&&
566 dev_priv
->fbc
.fb_id
== fb
->base
.id
&&
567 dev_priv
->fbc
.y
== crtc
->y
)
570 if (intel_fbc_enabled(dev
)) {
571 /* We update FBC along two paths, after changing fb/crtc
572 * configuration (modeswitching) and after page-flipping
573 * finishes. For the latter, we know that not only did
574 * we disable the FBC at the start of the page-flip
575 * sequence, but also more than one vblank has passed.
577 * For the former case of modeswitching, it is possible
578 * to switch between two FBC valid configurations
579 * instantaneously so we do need to disable the FBC
580 * before we can modify its control registers. We also
581 * have to wait for the next vblank for that to take
582 * effect. However, since we delay enabling FBC we can
583 * assume that a vblank has passed since disabling and
584 * that we can safely alter the registers in the deferred
587 * In the scenario that we go from a valid to invalid
588 * and then back to valid FBC configuration we have
589 * no strict enforcement that a vblank occurred since
590 * disabling the FBC. However, along all current pipe
591 * disabling paths we do need to wait for a vblank at
592 * some point. And we wait before enabling FBC anyway.
594 DRM_DEBUG_KMS("disabling active FBC for update\n");
595 intel_disable_fbc(dev
);
598 intel_enable_fbc(crtc
, 500);
599 dev_priv
->fbc
.no_fbc_reason
= FBC_OK
;
603 /* Multiple disables should be harmless */
604 if (intel_fbc_enabled(dev
)) {
605 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
606 intel_disable_fbc(dev
);
608 i915_gem_stolen_cleanup_compression(dev
);
611 static void i915_pineview_get_mem_freq(struct drm_device
*dev
)
613 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
616 tmp
= I915_READ(CLKCFG
);
618 switch (tmp
& CLKCFG_FSB_MASK
) {
620 dev_priv
->fsb_freq
= 533; /* 133*4 */
623 dev_priv
->fsb_freq
= 800; /* 200*4 */
626 dev_priv
->fsb_freq
= 667; /* 167*4 */
629 dev_priv
->fsb_freq
= 400; /* 100*4 */
633 switch (tmp
& CLKCFG_MEM_MASK
) {
635 dev_priv
->mem_freq
= 533;
638 dev_priv
->mem_freq
= 667;
641 dev_priv
->mem_freq
= 800;
645 /* detect pineview DDR3 setting */
646 tmp
= I915_READ(CSHRDDR3CTL
);
647 dev_priv
->is_ddr3
= (tmp
& CSHRDDR3CTL_DDR3
) ? 1 : 0;
650 static void i915_ironlake_get_mem_freq(struct drm_device
*dev
)
652 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
655 ddrpll
= I915_READ16(DDRMPLL1
);
656 csipll
= I915_READ16(CSIPLL0
);
658 switch (ddrpll
& 0xff) {
660 dev_priv
->mem_freq
= 800;
663 dev_priv
->mem_freq
= 1066;
666 dev_priv
->mem_freq
= 1333;
669 dev_priv
->mem_freq
= 1600;
672 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
674 dev_priv
->mem_freq
= 0;
678 dev_priv
->ips
.r_t
= dev_priv
->mem_freq
;
680 switch (csipll
& 0x3ff) {
682 dev_priv
->fsb_freq
= 3200;
685 dev_priv
->fsb_freq
= 3733;
688 dev_priv
->fsb_freq
= 4266;
691 dev_priv
->fsb_freq
= 4800;
694 dev_priv
->fsb_freq
= 5333;
697 dev_priv
->fsb_freq
= 5866;
700 dev_priv
->fsb_freq
= 6400;
703 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
705 dev_priv
->fsb_freq
= 0;
709 if (dev_priv
->fsb_freq
== 3200) {
710 dev_priv
->ips
.c_m
= 0;
711 } else if (dev_priv
->fsb_freq
> 3200 && dev_priv
->fsb_freq
<= 4800) {
712 dev_priv
->ips
.c_m
= 1;
714 dev_priv
->ips
.c_m
= 2;
718 static const struct cxsr_latency cxsr_latency_table
[] = {
719 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
720 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
721 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
722 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
723 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
725 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
726 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
727 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
728 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
729 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
731 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
732 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
733 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
734 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
735 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
737 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
738 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
739 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
740 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
741 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
743 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
744 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
745 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
746 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
747 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
749 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
750 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
751 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
752 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
753 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
756 static const struct cxsr_latency
*intel_get_cxsr_latency(int is_desktop
,
761 const struct cxsr_latency
*latency
;
764 if (fsb
== 0 || mem
== 0)
767 for (i
= 0; i
< ARRAY_SIZE(cxsr_latency_table
); i
++) {
768 latency
= &cxsr_latency_table
[i
];
769 if (is_desktop
== latency
->is_desktop
&&
770 is_ddr3
== latency
->is_ddr3
&&
771 fsb
== latency
->fsb_freq
&& mem
== latency
->mem_freq
)
775 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
780 static void pineview_disable_cxsr(struct drm_device
*dev
)
782 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
784 /* deactivate cxsr */
785 I915_WRITE(DSPFW3
, I915_READ(DSPFW3
) & ~PINEVIEW_SELF_REFRESH_EN
);
789 * Latency for FIFO fetches is dependent on several factors:
790 * - memory configuration (speed, channels)
792 * - current MCH state
793 * It can be fairly high in some situations, so here we assume a fairly
794 * pessimal value. It's a tradeoff between extra memory fetches (if we
795 * set this value too high, the FIFO will fetch frequently to stay full)
796 * and power consumption (set it too low to save power and we might see
797 * FIFO underruns and display "flicker").
799 * A value of 5us seems to be a good balance; safe for very low end
800 * platforms but not overly aggressive on lower latency configs.
802 static const int latency_ns
= 5000;
804 static int i9xx_get_fifo_size(struct drm_device
*dev
, int plane
)
806 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
807 uint32_t dsparb
= I915_READ(DSPARB
);
810 size
= dsparb
& 0x7f;
812 size
= ((dsparb
>> DSPARB_CSTART_SHIFT
) & 0x7f) - size
;
814 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
815 plane
? "B" : "A", size
);
820 static int i85x_get_fifo_size(struct drm_device
*dev
, int plane
)
822 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
823 uint32_t dsparb
= I915_READ(DSPARB
);
826 size
= dsparb
& 0x1ff;
828 size
= ((dsparb
>> DSPARB_BEND_SHIFT
) & 0x1ff) - size
;
829 size
>>= 1; /* Convert to cachelines */
831 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
832 plane
? "B" : "A", size
);
837 static int i845_get_fifo_size(struct drm_device
*dev
, int plane
)
839 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
840 uint32_t dsparb
= I915_READ(DSPARB
);
843 size
= dsparb
& 0x7f;
844 size
>>= 2; /* Convert to cachelines */
846 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
853 static int i830_get_fifo_size(struct drm_device
*dev
, int plane
)
855 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
856 uint32_t dsparb
= I915_READ(DSPARB
);
859 size
= dsparb
& 0x7f;
860 size
>>= 1; /* Convert to cachelines */
862 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
863 plane
? "B" : "A", size
);
868 /* Pineview has different values for various configs */
869 static const struct intel_watermark_params pineview_display_wm
= {
870 PINEVIEW_DISPLAY_FIFO
,
874 PINEVIEW_FIFO_LINE_SIZE
876 static const struct intel_watermark_params pineview_display_hplloff_wm
= {
877 PINEVIEW_DISPLAY_FIFO
,
879 PINEVIEW_DFT_HPLLOFF_WM
,
881 PINEVIEW_FIFO_LINE_SIZE
883 static const struct intel_watermark_params pineview_cursor_wm
= {
884 PINEVIEW_CURSOR_FIFO
,
885 PINEVIEW_CURSOR_MAX_WM
,
886 PINEVIEW_CURSOR_DFT_WM
,
887 PINEVIEW_CURSOR_GUARD_WM
,
888 PINEVIEW_FIFO_LINE_SIZE
,
890 static const struct intel_watermark_params pineview_cursor_hplloff_wm
= {
891 PINEVIEW_CURSOR_FIFO
,
892 PINEVIEW_CURSOR_MAX_WM
,
893 PINEVIEW_CURSOR_DFT_WM
,
894 PINEVIEW_CURSOR_GUARD_WM
,
895 PINEVIEW_FIFO_LINE_SIZE
897 static const struct intel_watermark_params g4x_wm_info
= {
904 static const struct intel_watermark_params g4x_cursor_wm_info
= {
911 static const struct intel_watermark_params valleyview_wm_info
= {
912 VALLEYVIEW_FIFO_SIZE
,
918 static const struct intel_watermark_params valleyview_cursor_wm_info
= {
920 VALLEYVIEW_CURSOR_MAX_WM
,
925 static const struct intel_watermark_params i965_cursor_wm_info
= {
932 static const struct intel_watermark_params i945_wm_info
= {
939 static const struct intel_watermark_params i915_wm_info
= {
946 static const struct intel_watermark_params i855_wm_info
= {
953 static const struct intel_watermark_params i830_wm_info
= {
961 static const struct intel_watermark_params ironlake_display_wm_info
= {
968 static const struct intel_watermark_params ironlake_cursor_wm_info
= {
975 static const struct intel_watermark_params ironlake_display_srwm_info
= {
977 ILK_DISPLAY_MAX_SRWM
,
978 ILK_DISPLAY_DFT_SRWM
,
982 static const struct intel_watermark_params ironlake_cursor_srwm_info
= {
990 static const struct intel_watermark_params sandybridge_display_wm_info
= {
997 static const struct intel_watermark_params sandybridge_cursor_wm_info
= {
1004 static const struct intel_watermark_params sandybridge_display_srwm_info
= {
1005 SNB_DISPLAY_SR_FIFO
,
1006 SNB_DISPLAY_MAX_SRWM
,
1007 SNB_DISPLAY_DFT_SRWM
,
1011 static const struct intel_watermark_params sandybridge_cursor_srwm_info
= {
1013 SNB_CURSOR_MAX_SRWM
,
1014 SNB_CURSOR_DFT_SRWM
,
1021 * intel_calculate_wm - calculate watermark level
1022 * @clock_in_khz: pixel clock
1023 * @wm: chip FIFO params
1024 * @pixel_size: display pixel size
1025 * @latency_ns: memory latency for the platform
1027 * Calculate the watermark level (the level at which the display plane will
1028 * start fetching from memory again). Each chip has a different display
1029 * FIFO size and allocation, so the caller needs to figure that out and pass
1030 * in the correct intel_watermark_params structure.
1032 * As the pixel clock runs, the FIFO will be drained at a rate that depends
1033 * on the pixel size. When it reaches the watermark level, it'll start
1034 * fetching FIFO line sized based chunks from memory until the FIFO fills
1035 * past the watermark point. If the FIFO drains completely, a FIFO underrun
1036 * will occur, and a display engine hang could result.
1038 static unsigned long intel_calculate_wm(unsigned long clock_in_khz
,
1039 const struct intel_watermark_params
*wm
,
1042 unsigned long latency_ns
)
1044 long entries_required
, wm_size
;
1047 * Note: we need to make sure we don't overflow for various clock &
1049 * clocks go from a few thousand to several hundred thousand.
1050 * latency is usually a few thousand
1052 entries_required
= ((clock_in_khz
/ 1000) * pixel_size
* latency_ns
) /
1054 entries_required
= DIV_ROUND_UP(entries_required
, wm
->cacheline_size
);
1056 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required
);
1058 wm_size
= fifo_size
- (entries_required
+ wm
->guard_size
);
1060 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size
);
1062 /* Don't promote wm_size to unsigned... */
1063 if (wm_size
> (long)wm
->max_wm
)
1064 wm_size
= wm
->max_wm
;
1066 wm_size
= wm
->default_wm
;
1070 static struct drm_crtc
*single_enabled_crtc(struct drm_device
*dev
)
1072 struct drm_crtc
*crtc
, *enabled
= NULL
;
1074 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1075 if (intel_crtc_active(crtc
)) {
1085 static void pineview_update_wm(struct drm_crtc
*unused_crtc
)
1087 struct drm_device
*dev
= unused_crtc
->dev
;
1088 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1089 struct drm_crtc
*crtc
;
1090 const struct cxsr_latency
*latency
;
1094 latency
= intel_get_cxsr_latency(IS_PINEVIEW_G(dev
), dev_priv
->is_ddr3
,
1095 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
1097 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1098 pineview_disable_cxsr(dev
);
1102 crtc
= single_enabled_crtc(dev
);
1104 const struct drm_display_mode
*adjusted_mode
;
1105 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1108 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1109 clock
= adjusted_mode
->crtc_clock
;
1112 wm
= intel_calculate_wm(clock
, &pineview_display_wm
,
1113 pineview_display_wm
.fifo_size
,
1114 pixel_size
, latency
->display_sr
);
1115 reg
= I915_READ(DSPFW1
);
1116 reg
&= ~DSPFW_SR_MASK
;
1117 reg
|= wm
<< DSPFW_SR_SHIFT
;
1118 I915_WRITE(DSPFW1
, reg
);
1119 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg
);
1122 wm
= intel_calculate_wm(clock
, &pineview_cursor_wm
,
1123 pineview_display_wm
.fifo_size
,
1124 pixel_size
, latency
->cursor_sr
);
1125 reg
= I915_READ(DSPFW3
);
1126 reg
&= ~DSPFW_CURSOR_SR_MASK
;
1127 reg
|= (wm
& 0x3f) << DSPFW_CURSOR_SR_SHIFT
;
1128 I915_WRITE(DSPFW3
, reg
);
1130 /* Display HPLL off SR */
1131 wm
= intel_calculate_wm(clock
, &pineview_display_hplloff_wm
,
1132 pineview_display_hplloff_wm
.fifo_size
,
1133 pixel_size
, latency
->display_hpll_disable
);
1134 reg
= I915_READ(DSPFW3
);
1135 reg
&= ~DSPFW_HPLL_SR_MASK
;
1136 reg
|= wm
& DSPFW_HPLL_SR_MASK
;
1137 I915_WRITE(DSPFW3
, reg
);
1139 /* cursor HPLL off SR */
1140 wm
= intel_calculate_wm(clock
, &pineview_cursor_hplloff_wm
,
1141 pineview_display_hplloff_wm
.fifo_size
,
1142 pixel_size
, latency
->cursor_hpll_disable
);
1143 reg
= I915_READ(DSPFW3
);
1144 reg
&= ~DSPFW_HPLL_CURSOR_MASK
;
1145 reg
|= (wm
& 0x3f) << DSPFW_HPLL_CURSOR_SHIFT
;
1146 I915_WRITE(DSPFW3
, reg
);
1147 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg
);
1151 I915_READ(DSPFW3
) | PINEVIEW_SELF_REFRESH_EN
);
1152 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1154 pineview_disable_cxsr(dev
);
1155 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1159 static bool g4x_compute_wm0(struct drm_device
*dev
,
1161 const struct intel_watermark_params
*display
,
1162 int display_latency_ns
,
1163 const struct intel_watermark_params
*cursor
,
1164 int cursor_latency_ns
,
1168 struct drm_crtc
*crtc
;
1169 const struct drm_display_mode
*adjusted_mode
;
1170 int htotal
, hdisplay
, clock
, pixel_size
;
1171 int line_time_us
, line_count
;
1172 int entries
, tlb_miss
;
1174 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1175 if (!intel_crtc_active(crtc
)) {
1176 *cursor_wm
= cursor
->guard_size
;
1177 *plane_wm
= display
->guard_size
;
1181 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1182 clock
= adjusted_mode
->crtc_clock
;
1183 htotal
= adjusted_mode
->htotal
;
1184 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1185 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1187 /* Use the small buffer method to calculate plane watermark */
1188 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
1189 tlb_miss
= display
->fifo_size
*display
->cacheline_size
- hdisplay
* 8;
1191 entries
+= tlb_miss
;
1192 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
1193 *plane_wm
= entries
+ display
->guard_size
;
1194 if (*plane_wm
> (int)display
->max_wm
)
1195 *plane_wm
= display
->max_wm
;
1197 /* Use the large buffer method to calculate cursor watermark */
1198 line_time_us
= ((htotal
* 1000) / clock
);
1199 line_count
= (cursor_latency_ns
/ line_time_us
+ 1000) / 1000;
1200 entries
= line_count
* 64 * pixel_size
;
1201 tlb_miss
= cursor
->fifo_size
*cursor
->cacheline_size
- hdisplay
* 8;
1203 entries
+= tlb_miss
;
1204 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1205 *cursor_wm
= entries
+ cursor
->guard_size
;
1206 if (*cursor_wm
> (int)cursor
->max_wm
)
1207 *cursor_wm
= (int)cursor
->max_wm
;
1213 * Check the wm result.
1215 * If any calculated watermark values is larger than the maximum value that
1216 * can be programmed into the associated watermark register, that watermark
1219 static bool g4x_check_srwm(struct drm_device
*dev
,
1220 int display_wm
, int cursor_wm
,
1221 const struct intel_watermark_params
*display
,
1222 const struct intel_watermark_params
*cursor
)
1224 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1225 display_wm
, cursor_wm
);
1227 if (display_wm
> display
->max_wm
) {
1228 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1229 display_wm
, display
->max_wm
);
1233 if (cursor_wm
> cursor
->max_wm
) {
1234 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1235 cursor_wm
, cursor
->max_wm
);
1239 if (!(display_wm
|| cursor_wm
)) {
1240 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1247 static bool g4x_compute_srwm(struct drm_device
*dev
,
1250 const struct intel_watermark_params
*display
,
1251 const struct intel_watermark_params
*cursor
,
1252 int *display_wm
, int *cursor_wm
)
1254 struct drm_crtc
*crtc
;
1255 const struct drm_display_mode
*adjusted_mode
;
1256 int hdisplay
, htotal
, pixel_size
, clock
;
1257 unsigned long line_time_us
;
1258 int line_count
, line_size
;
1263 *display_wm
= *cursor_wm
= 0;
1267 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1268 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1269 clock
= adjusted_mode
->crtc_clock
;
1270 htotal
= adjusted_mode
->htotal
;
1271 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1272 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1274 line_time_us
= (htotal
* 1000) / clock
;
1275 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1276 line_size
= hdisplay
* pixel_size
;
1278 /* Use the minimum of the small and large buffer method for primary */
1279 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1280 large
= line_count
* line_size
;
1282 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1283 *display_wm
= entries
+ display
->guard_size
;
1285 /* calculate the self-refresh watermark for display cursor */
1286 entries
= line_count
* pixel_size
* 64;
1287 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1288 *cursor_wm
= entries
+ cursor
->guard_size
;
1290 return g4x_check_srwm(dev
,
1291 *display_wm
, *cursor_wm
,
1295 static bool vlv_compute_drain_latency(struct drm_device
*dev
,
1297 int *plane_prec_mult
,
1299 int *cursor_prec_mult
,
1302 struct drm_crtc
*crtc
;
1303 int clock
, pixel_size
;
1306 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1307 if (!intel_crtc_active(crtc
))
1310 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
1311 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8; /* BPP */
1313 entries
= (clock
/ 1000) * pixel_size
;
1314 *plane_prec_mult
= (entries
> 256) ?
1315 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1316 *plane_dl
= (64 * (*plane_prec_mult
) * 4) / ((clock
/ 1000) *
1319 entries
= (clock
/ 1000) * 4; /* BPP is always 4 for cursor */
1320 *cursor_prec_mult
= (entries
> 256) ?
1321 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1322 *cursor_dl
= (64 * (*cursor_prec_mult
) * 4) / ((clock
/ 1000) * 4);
1328 * Update drain latency registers of memory arbiter
1330 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1331 * to be programmed. Each plane has a drain latency multiplier and a drain
1335 static void vlv_update_drain_latency(struct drm_device
*dev
)
1337 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1338 int planea_prec
, planea_dl
, planeb_prec
, planeb_dl
;
1339 int cursora_prec
, cursora_dl
, cursorb_prec
, cursorb_dl
;
1340 int plane_prec_mult
, cursor_prec_mult
; /* Precision multiplier is
1343 /* For plane A, Cursor A */
1344 if (vlv_compute_drain_latency(dev
, 0, &plane_prec_mult
, &planea_dl
,
1345 &cursor_prec_mult
, &cursora_dl
)) {
1346 cursora_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1347 DDL_CURSORA_PRECISION_32
: DDL_CURSORA_PRECISION_16
;
1348 planea_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1349 DDL_PLANEA_PRECISION_32
: DDL_PLANEA_PRECISION_16
;
1351 I915_WRITE(VLV_DDL1
, cursora_prec
|
1352 (cursora_dl
<< DDL_CURSORA_SHIFT
) |
1353 planea_prec
| planea_dl
);
1356 /* For plane B, Cursor B */
1357 if (vlv_compute_drain_latency(dev
, 1, &plane_prec_mult
, &planeb_dl
,
1358 &cursor_prec_mult
, &cursorb_dl
)) {
1359 cursorb_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1360 DDL_CURSORB_PRECISION_32
: DDL_CURSORB_PRECISION_16
;
1361 planeb_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1362 DDL_PLANEB_PRECISION_32
: DDL_PLANEB_PRECISION_16
;
1364 I915_WRITE(VLV_DDL2
, cursorb_prec
|
1365 (cursorb_dl
<< DDL_CURSORB_SHIFT
) |
1366 planeb_prec
| planeb_dl
);
1370 #define single_plane_enabled(mask) is_power_of_2(mask)
1372 static void valleyview_update_wm(struct drm_crtc
*crtc
)
1374 struct drm_device
*dev
= crtc
->dev
;
1375 static const int sr_latency_ns
= 12000;
1376 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1377 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1378 int plane_sr
, cursor_sr
;
1379 int ignore_plane_sr
, ignore_cursor_sr
;
1380 unsigned int enabled
= 0;
1382 vlv_update_drain_latency(dev
);
1384 if (g4x_compute_wm0(dev
, PIPE_A
,
1385 &valleyview_wm_info
, latency_ns
,
1386 &valleyview_cursor_wm_info
, latency_ns
,
1387 &planea_wm
, &cursora_wm
))
1388 enabled
|= 1 << PIPE_A
;
1390 if (g4x_compute_wm0(dev
, PIPE_B
,
1391 &valleyview_wm_info
, latency_ns
,
1392 &valleyview_cursor_wm_info
, latency_ns
,
1393 &planeb_wm
, &cursorb_wm
))
1394 enabled
|= 1 << PIPE_B
;
1396 if (single_plane_enabled(enabled
) &&
1397 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1399 &valleyview_wm_info
,
1400 &valleyview_cursor_wm_info
,
1401 &plane_sr
, &ignore_cursor_sr
) &&
1402 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1404 &valleyview_wm_info
,
1405 &valleyview_cursor_wm_info
,
1406 &ignore_plane_sr
, &cursor_sr
)) {
1407 I915_WRITE(FW_BLC_SELF_VLV
, FW_CSPWRDWNEN
);
1409 I915_WRITE(FW_BLC_SELF_VLV
,
1410 I915_READ(FW_BLC_SELF_VLV
) & ~FW_CSPWRDWNEN
);
1411 plane_sr
= cursor_sr
= 0;
1414 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1415 planea_wm
, cursora_wm
,
1416 planeb_wm
, cursorb_wm
,
1417 plane_sr
, cursor_sr
);
1420 (plane_sr
<< DSPFW_SR_SHIFT
) |
1421 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1422 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1425 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1426 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1428 (I915_READ(DSPFW3
) & ~DSPFW_CURSOR_SR_MASK
) |
1429 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1432 static void g4x_update_wm(struct drm_crtc
*crtc
)
1434 struct drm_device
*dev
= crtc
->dev
;
1435 static const int sr_latency_ns
= 12000;
1436 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1437 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1438 int plane_sr
, cursor_sr
;
1439 unsigned int enabled
= 0;
1441 if (g4x_compute_wm0(dev
, PIPE_A
,
1442 &g4x_wm_info
, latency_ns
,
1443 &g4x_cursor_wm_info
, latency_ns
,
1444 &planea_wm
, &cursora_wm
))
1445 enabled
|= 1 << PIPE_A
;
1447 if (g4x_compute_wm0(dev
, PIPE_B
,
1448 &g4x_wm_info
, latency_ns
,
1449 &g4x_cursor_wm_info
, latency_ns
,
1450 &planeb_wm
, &cursorb_wm
))
1451 enabled
|= 1 << PIPE_B
;
1453 if (single_plane_enabled(enabled
) &&
1454 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1457 &g4x_cursor_wm_info
,
1458 &plane_sr
, &cursor_sr
)) {
1459 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1461 I915_WRITE(FW_BLC_SELF
,
1462 I915_READ(FW_BLC_SELF
) & ~FW_BLC_SELF_EN
);
1463 plane_sr
= cursor_sr
= 0;
1466 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1467 planea_wm
, cursora_wm
,
1468 planeb_wm
, cursorb_wm
,
1469 plane_sr
, cursor_sr
);
1472 (plane_sr
<< DSPFW_SR_SHIFT
) |
1473 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1474 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1477 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1478 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1479 /* HPLL off in SR has some issues on G4x... disable it */
1481 (I915_READ(DSPFW3
) & ~(DSPFW_HPLL_SR_EN
| DSPFW_CURSOR_SR_MASK
)) |
1482 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1485 static void i965_update_wm(struct drm_crtc
*unused_crtc
)
1487 struct drm_device
*dev
= unused_crtc
->dev
;
1488 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1489 struct drm_crtc
*crtc
;
1493 /* Calc sr entries for one plane configs */
1494 crtc
= single_enabled_crtc(dev
);
1496 /* self-refresh has much higher latency */
1497 static const int sr_latency_ns
= 12000;
1498 const struct drm_display_mode
*adjusted_mode
=
1499 &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1500 int clock
= adjusted_mode
->crtc_clock
;
1501 int htotal
= adjusted_mode
->htotal
;
1502 int hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1503 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1504 unsigned long line_time_us
;
1507 line_time_us
= ((htotal
* 1000) / clock
);
1509 /* Use ns/us then divide to preserve precision */
1510 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1511 pixel_size
* hdisplay
;
1512 entries
= DIV_ROUND_UP(entries
, I915_FIFO_LINE_SIZE
);
1513 srwm
= I965_FIFO_SIZE
- entries
;
1517 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1520 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1522 entries
= DIV_ROUND_UP(entries
,
1523 i965_cursor_wm_info
.cacheline_size
);
1524 cursor_sr
= i965_cursor_wm_info
.fifo_size
-
1525 (entries
+ i965_cursor_wm_info
.guard_size
);
1527 if (cursor_sr
> i965_cursor_wm_info
.max_wm
)
1528 cursor_sr
= i965_cursor_wm_info
.max_wm
;
1530 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1531 "cursor %d\n", srwm
, cursor_sr
);
1533 if (IS_CRESTLINE(dev
))
1534 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1536 /* Turn off self refresh if both pipes are enabled */
1537 if (IS_CRESTLINE(dev
))
1538 I915_WRITE(FW_BLC_SELF
, I915_READ(FW_BLC_SELF
)
1542 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1545 /* 965 has limitations... */
1546 I915_WRITE(DSPFW1
, (srwm
<< DSPFW_SR_SHIFT
) |
1547 (8 << 16) | (8 << 8) | (8 << 0));
1548 I915_WRITE(DSPFW2
, (8 << 8) | (8 << 0));
1549 /* update cursor SR watermark */
1550 I915_WRITE(DSPFW3
, (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1553 static void i9xx_update_wm(struct drm_crtc
*unused_crtc
)
1555 struct drm_device
*dev
= unused_crtc
->dev
;
1556 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1557 const struct intel_watermark_params
*wm_info
;
1562 int planea_wm
, planeb_wm
;
1563 struct drm_crtc
*crtc
, *enabled
= NULL
;
1566 wm_info
= &i945_wm_info
;
1567 else if (!IS_GEN2(dev
))
1568 wm_info
= &i915_wm_info
;
1570 wm_info
= &i855_wm_info
;
1572 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 0);
1573 crtc
= intel_get_crtc_for_plane(dev
, 0);
1574 if (intel_crtc_active(crtc
)) {
1575 const struct drm_display_mode
*adjusted_mode
;
1576 int cpp
= crtc
->fb
->bits_per_pixel
/ 8;
1580 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1581 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1582 wm_info
, fifo_size
, cpp
,
1586 planea_wm
= fifo_size
- wm_info
->guard_size
;
1588 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 1);
1589 crtc
= intel_get_crtc_for_plane(dev
, 1);
1590 if (intel_crtc_active(crtc
)) {
1591 const struct drm_display_mode
*adjusted_mode
;
1592 int cpp
= crtc
->fb
->bits_per_pixel
/ 8;
1596 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1597 planeb_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1598 wm_info
, fifo_size
, cpp
,
1600 if (enabled
== NULL
)
1605 planeb_wm
= fifo_size
- wm_info
->guard_size
;
1607 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm
, planeb_wm
);
1610 * Overlay gets an aggressive default since video jitter is bad.
1614 /* Play safe and disable self-refresh before adjusting watermarks. */
1615 if (IS_I945G(dev
) || IS_I945GM(dev
))
1616 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN_MASK
| 0);
1617 else if (IS_I915GM(dev
))
1618 I915_WRITE(INSTPM
, I915_READ(INSTPM
) & ~INSTPM_SELF_EN
);
1620 /* Calc sr entries for one plane configs */
1621 if (HAS_FW_BLC(dev
) && enabled
) {
1622 /* self-refresh has much higher latency */
1623 static const int sr_latency_ns
= 6000;
1624 const struct drm_display_mode
*adjusted_mode
=
1625 &to_intel_crtc(enabled
)->config
.adjusted_mode
;
1626 int clock
= adjusted_mode
->crtc_clock
;
1627 int htotal
= adjusted_mode
->htotal
;
1628 int hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1629 int pixel_size
= enabled
->fb
->bits_per_pixel
/ 8;
1630 unsigned long line_time_us
;
1633 line_time_us
= (htotal
* 1000) / clock
;
1635 /* Use ns/us then divide to preserve precision */
1636 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1637 pixel_size
* hdisplay
;
1638 entries
= DIV_ROUND_UP(entries
, wm_info
->cacheline_size
);
1639 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries
);
1640 srwm
= wm_info
->fifo_size
- entries
;
1644 if (IS_I945G(dev
) || IS_I945GM(dev
))
1645 I915_WRITE(FW_BLC_SELF
,
1646 FW_BLC_SELF_FIFO_MASK
| (srwm
& 0xff));
1647 else if (IS_I915GM(dev
))
1648 I915_WRITE(FW_BLC_SELF
, srwm
& 0x3f);
1651 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1652 planea_wm
, planeb_wm
, cwm
, srwm
);
1654 fwater_lo
= ((planeb_wm
& 0x3f) << 16) | (planea_wm
& 0x3f);
1655 fwater_hi
= (cwm
& 0x1f);
1657 /* Set request length to 8 cachelines per fetch */
1658 fwater_lo
= fwater_lo
| (1 << 24) | (1 << 8);
1659 fwater_hi
= fwater_hi
| (1 << 8);
1661 I915_WRITE(FW_BLC
, fwater_lo
);
1662 I915_WRITE(FW_BLC2
, fwater_hi
);
1664 if (HAS_FW_BLC(dev
)) {
1666 if (IS_I945G(dev
) || IS_I945GM(dev
))
1667 I915_WRITE(FW_BLC_SELF
,
1668 FW_BLC_SELF_EN_MASK
| FW_BLC_SELF_EN
);
1669 else if (IS_I915GM(dev
))
1670 I915_WRITE(INSTPM
, I915_READ(INSTPM
) | INSTPM_SELF_EN
);
1671 DRM_DEBUG_KMS("memory self refresh enabled\n");
1673 DRM_DEBUG_KMS("memory self refresh disabled\n");
1677 static void i830_update_wm(struct drm_crtc
*unused_crtc
)
1679 struct drm_device
*dev
= unused_crtc
->dev
;
1680 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1681 struct drm_crtc
*crtc
;
1682 const struct drm_display_mode
*adjusted_mode
;
1686 crtc
= single_enabled_crtc(dev
);
1690 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1691 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1693 dev_priv
->display
.get_fifo_size(dev
, 0),
1695 fwater_lo
= I915_READ(FW_BLC
) & ~0xfff;
1696 fwater_lo
|= (3<<8) | planea_wm
;
1698 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm
);
1700 I915_WRITE(FW_BLC
, fwater_lo
);
1704 * Check the wm result.
1706 * If any calculated watermark values is larger than the maximum value that
1707 * can be programmed into the associated watermark register, that watermark
1710 static bool ironlake_check_srwm(struct drm_device
*dev
, int level
,
1711 int fbc_wm
, int display_wm
, int cursor_wm
,
1712 const struct intel_watermark_params
*display
,
1713 const struct intel_watermark_params
*cursor
)
1715 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1717 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1718 " cursor %d\n", level
, display_wm
, fbc_wm
, cursor_wm
);
1720 if (fbc_wm
> SNB_FBC_MAX_SRWM
) {
1721 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1722 fbc_wm
, SNB_FBC_MAX_SRWM
, level
);
1724 /* fbc has it's own way to disable FBC WM */
1725 I915_WRITE(DISP_ARB_CTL
,
1726 I915_READ(DISP_ARB_CTL
) | DISP_FBC_WM_DIS
);
1728 } else if (INTEL_INFO(dev
)->gen
>= 6) {
1729 /* enable FBC WM (except on ILK, where it must remain off) */
1730 I915_WRITE(DISP_ARB_CTL
,
1731 I915_READ(DISP_ARB_CTL
) & ~DISP_FBC_WM_DIS
);
1734 if (display_wm
> display
->max_wm
) {
1735 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1736 display_wm
, SNB_DISPLAY_MAX_SRWM
, level
);
1740 if (cursor_wm
> cursor
->max_wm
) {
1741 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1742 cursor_wm
, SNB_CURSOR_MAX_SRWM
, level
);
1746 if (!(fbc_wm
|| display_wm
|| cursor_wm
)) {
1747 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level
, level
);
1755 * Compute watermark values of WM[1-3],
1757 static bool ironlake_compute_srwm(struct drm_device
*dev
, int level
, int plane
,
1759 const struct intel_watermark_params
*display
,
1760 const struct intel_watermark_params
*cursor
,
1761 int *fbc_wm
, int *display_wm
, int *cursor_wm
)
1763 struct drm_crtc
*crtc
;
1764 const struct drm_display_mode
*adjusted_mode
;
1765 unsigned long line_time_us
;
1766 int hdisplay
, htotal
, pixel_size
, clock
;
1767 int line_count
, line_size
;
1772 *fbc_wm
= *display_wm
= *cursor_wm
= 0;
1776 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1777 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1778 clock
= adjusted_mode
->crtc_clock
;
1779 htotal
= adjusted_mode
->htotal
;
1780 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1781 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1783 line_time_us
= (htotal
* 1000) / clock
;
1784 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1785 line_size
= hdisplay
* pixel_size
;
1787 /* Use the minimum of the small and large buffer method for primary */
1788 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1789 large
= line_count
* line_size
;
1791 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1792 *display_wm
= entries
+ display
->guard_size
;
1796 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1798 *fbc_wm
= DIV_ROUND_UP(*display_wm
* 64, line_size
) + 2;
1800 /* calculate the self-refresh watermark for display cursor */
1801 entries
= line_count
* pixel_size
* 64;
1802 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1803 *cursor_wm
= entries
+ cursor
->guard_size
;
1805 return ironlake_check_srwm(dev
, level
,
1806 *fbc_wm
, *display_wm
, *cursor_wm
,
1810 static void ironlake_update_wm(struct drm_crtc
*crtc
)
1812 struct drm_device
*dev
= crtc
->dev
;
1813 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1814 int fbc_wm
, plane_wm
, cursor_wm
;
1815 unsigned int enabled
;
1818 if (g4x_compute_wm0(dev
, PIPE_A
,
1819 &ironlake_display_wm_info
,
1820 dev_priv
->wm
.pri_latency
[0] * 100,
1821 &ironlake_cursor_wm_info
,
1822 dev_priv
->wm
.cur_latency
[0] * 100,
1823 &plane_wm
, &cursor_wm
)) {
1824 I915_WRITE(WM0_PIPEA_ILK
,
1825 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1826 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1827 " plane %d, " "cursor: %d\n",
1828 plane_wm
, cursor_wm
);
1829 enabled
|= 1 << PIPE_A
;
1832 if (g4x_compute_wm0(dev
, PIPE_B
,
1833 &ironlake_display_wm_info
,
1834 dev_priv
->wm
.pri_latency
[0] * 100,
1835 &ironlake_cursor_wm_info
,
1836 dev_priv
->wm
.cur_latency
[0] * 100,
1837 &plane_wm
, &cursor_wm
)) {
1838 I915_WRITE(WM0_PIPEB_ILK
,
1839 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1840 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1841 " plane %d, cursor: %d\n",
1842 plane_wm
, cursor_wm
);
1843 enabled
|= 1 << PIPE_B
;
1847 * Calculate and update the self-refresh watermark only when one
1848 * display plane is used.
1850 I915_WRITE(WM3_LP_ILK
, 0);
1851 I915_WRITE(WM2_LP_ILK
, 0);
1852 I915_WRITE(WM1_LP_ILK
, 0);
1854 if (!single_plane_enabled(enabled
))
1856 enabled
= ffs(enabled
) - 1;
1859 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1860 dev_priv
->wm
.pri_latency
[1] * 500,
1861 &ironlake_display_srwm_info
,
1862 &ironlake_cursor_srwm_info
,
1863 &fbc_wm
, &plane_wm
, &cursor_wm
))
1866 I915_WRITE(WM1_LP_ILK
,
1868 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
1869 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1870 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1874 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1875 dev_priv
->wm
.pri_latency
[2] * 500,
1876 &ironlake_display_srwm_info
,
1877 &ironlake_cursor_srwm_info
,
1878 &fbc_wm
, &plane_wm
, &cursor_wm
))
1881 I915_WRITE(WM2_LP_ILK
,
1883 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
1884 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1885 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1889 * WM3 is unsupported on ILK, probably because we don't have latency
1890 * data for that power state
1894 static void sandybridge_update_wm(struct drm_crtc
*crtc
)
1896 struct drm_device
*dev
= crtc
->dev
;
1897 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1898 int latency
= dev_priv
->wm
.pri_latency
[0] * 100; /* In unit 0.1us */
1900 int fbc_wm
, plane_wm
, cursor_wm
;
1901 unsigned int enabled
;
1904 if (g4x_compute_wm0(dev
, PIPE_A
,
1905 &sandybridge_display_wm_info
, latency
,
1906 &sandybridge_cursor_wm_info
, latency
,
1907 &plane_wm
, &cursor_wm
)) {
1908 val
= I915_READ(WM0_PIPEA_ILK
);
1909 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1910 I915_WRITE(WM0_PIPEA_ILK
, val
|
1911 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1912 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1913 " plane %d, " "cursor: %d\n",
1914 plane_wm
, cursor_wm
);
1915 enabled
|= 1 << PIPE_A
;
1918 if (g4x_compute_wm0(dev
, PIPE_B
,
1919 &sandybridge_display_wm_info
, latency
,
1920 &sandybridge_cursor_wm_info
, latency
,
1921 &plane_wm
, &cursor_wm
)) {
1922 val
= I915_READ(WM0_PIPEB_ILK
);
1923 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1924 I915_WRITE(WM0_PIPEB_ILK
, val
|
1925 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1926 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1927 " plane %d, cursor: %d\n",
1928 plane_wm
, cursor_wm
);
1929 enabled
|= 1 << PIPE_B
;
1933 * Calculate and update the self-refresh watermark only when one
1934 * display plane is used.
1936 * SNB support 3 levels of watermark.
1938 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1939 * and disabled in the descending order
1942 I915_WRITE(WM3_LP_ILK
, 0);
1943 I915_WRITE(WM2_LP_ILK
, 0);
1944 I915_WRITE(WM1_LP_ILK
, 0);
1946 if (!single_plane_enabled(enabled
) ||
1947 dev_priv
->sprite_scaling_enabled
)
1949 enabled
= ffs(enabled
) - 1;
1952 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1953 dev_priv
->wm
.pri_latency
[1] * 500,
1954 &sandybridge_display_srwm_info
,
1955 &sandybridge_cursor_srwm_info
,
1956 &fbc_wm
, &plane_wm
, &cursor_wm
))
1959 I915_WRITE(WM1_LP_ILK
,
1961 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
1962 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1963 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1967 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1968 dev_priv
->wm
.pri_latency
[2] * 500,
1969 &sandybridge_display_srwm_info
,
1970 &sandybridge_cursor_srwm_info
,
1971 &fbc_wm
, &plane_wm
, &cursor_wm
))
1974 I915_WRITE(WM2_LP_ILK
,
1976 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
1977 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1978 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1982 if (!ironlake_compute_srwm(dev
, 3, enabled
,
1983 dev_priv
->wm
.pri_latency
[3] * 500,
1984 &sandybridge_display_srwm_info
,
1985 &sandybridge_cursor_srwm_info
,
1986 &fbc_wm
, &plane_wm
, &cursor_wm
))
1989 I915_WRITE(WM3_LP_ILK
,
1991 (dev_priv
->wm
.pri_latency
[3] << WM1_LP_LATENCY_SHIFT
) |
1992 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1993 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1997 static void ivybridge_update_wm(struct drm_crtc
*crtc
)
1999 struct drm_device
*dev
= crtc
->dev
;
2000 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2001 int latency
= dev_priv
->wm
.pri_latency
[0] * 100; /* In unit 0.1us */
2003 int fbc_wm
, plane_wm
, cursor_wm
;
2004 int ignore_fbc_wm
, ignore_plane_wm
, ignore_cursor_wm
;
2005 unsigned int enabled
;
2008 if (g4x_compute_wm0(dev
, PIPE_A
,
2009 &sandybridge_display_wm_info
, latency
,
2010 &sandybridge_cursor_wm_info
, latency
,
2011 &plane_wm
, &cursor_wm
)) {
2012 val
= I915_READ(WM0_PIPEA_ILK
);
2013 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2014 I915_WRITE(WM0_PIPEA_ILK
, val
|
2015 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2016 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
2017 " plane %d, " "cursor: %d\n",
2018 plane_wm
, cursor_wm
);
2019 enabled
|= 1 << PIPE_A
;
2022 if (g4x_compute_wm0(dev
, PIPE_B
,
2023 &sandybridge_display_wm_info
, latency
,
2024 &sandybridge_cursor_wm_info
, latency
,
2025 &plane_wm
, &cursor_wm
)) {
2026 val
= I915_READ(WM0_PIPEB_ILK
);
2027 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2028 I915_WRITE(WM0_PIPEB_ILK
, val
|
2029 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2030 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
2031 " plane %d, cursor: %d\n",
2032 plane_wm
, cursor_wm
);
2033 enabled
|= 1 << PIPE_B
;
2036 if (g4x_compute_wm0(dev
, PIPE_C
,
2037 &sandybridge_display_wm_info
, latency
,
2038 &sandybridge_cursor_wm_info
, latency
,
2039 &plane_wm
, &cursor_wm
)) {
2040 val
= I915_READ(WM0_PIPEC_IVB
);
2041 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2042 I915_WRITE(WM0_PIPEC_IVB
, val
|
2043 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2044 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
2045 " plane %d, cursor: %d\n",
2046 plane_wm
, cursor_wm
);
2047 enabled
|= 1 << PIPE_C
;
2051 * Calculate and update the self-refresh watermark only when one
2052 * display plane is used.
2054 * SNB support 3 levels of watermark.
2056 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
2057 * and disabled in the descending order
2060 I915_WRITE(WM3_LP_ILK
, 0);
2061 I915_WRITE(WM2_LP_ILK
, 0);
2062 I915_WRITE(WM1_LP_ILK
, 0);
2064 if (!single_plane_enabled(enabled
) ||
2065 dev_priv
->sprite_scaling_enabled
)
2067 enabled
= ffs(enabled
) - 1;
2070 if (!ironlake_compute_srwm(dev
, 1, enabled
,
2071 dev_priv
->wm
.pri_latency
[1] * 500,
2072 &sandybridge_display_srwm_info
,
2073 &sandybridge_cursor_srwm_info
,
2074 &fbc_wm
, &plane_wm
, &cursor_wm
))
2077 I915_WRITE(WM1_LP_ILK
,
2079 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
2080 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2081 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2085 if (!ironlake_compute_srwm(dev
, 2, enabled
,
2086 dev_priv
->wm
.pri_latency
[2] * 500,
2087 &sandybridge_display_srwm_info
,
2088 &sandybridge_cursor_srwm_info
,
2089 &fbc_wm
, &plane_wm
, &cursor_wm
))
2092 I915_WRITE(WM2_LP_ILK
,
2094 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
2095 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2096 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2099 /* WM3, note we have to correct the cursor latency */
2100 if (!ironlake_compute_srwm(dev
, 3, enabled
,
2101 dev_priv
->wm
.pri_latency
[3] * 500,
2102 &sandybridge_display_srwm_info
,
2103 &sandybridge_cursor_srwm_info
,
2104 &fbc_wm
, &plane_wm
, &ignore_cursor_wm
) ||
2105 !ironlake_compute_srwm(dev
, 3, enabled
,
2106 dev_priv
->wm
.cur_latency
[3] * 500,
2107 &sandybridge_display_srwm_info
,
2108 &sandybridge_cursor_srwm_info
,
2109 &ignore_fbc_wm
, &ignore_plane_wm
, &cursor_wm
))
2112 I915_WRITE(WM3_LP_ILK
,
2114 (dev_priv
->wm
.pri_latency
[3] << WM1_LP_LATENCY_SHIFT
) |
2115 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2116 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2120 static uint32_t ilk_pipe_pixel_rate(struct drm_device
*dev
,
2121 struct drm_crtc
*crtc
)
2123 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2124 uint32_t pixel_rate
;
2126 pixel_rate
= intel_crtc
->config
.adjusted_mode
.crtc_clock
;
2128 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
2129 * adjust the pixel_rate here. */
2131 if (intel_crtc
->config
.pch_pfit
.enabled
) {
2132 uint64_t pipe_w
, pipe_h
, pfit_w
, pfit_h
;
2133 uint32_t pfit_size
= intel_crtc
->config
.pch_pfit
.size
;
2135 pipe_w
= intel_crtc
->config
.pipe_src_w
;
2136 pipe_h
= intel_crtc
->config
.pipe_src_h
;
2137 pfit_w
= (pfit_size
>> 16) & 0xFFFF;
2138 pfit_h
= pfit_size
& 0xFFFF;
2139 if (pipe_w
< pfit_w
)
2141 if (pipe_h
< pfit_h
)
2144 pixel_rate
= div_u64((uint64_t) pixel_rate
* pipe_w
* pipe_h
,
2151 /* latency must be in 0.1us units. */
2152 static uint32_t ilk_wm_method1(uint32_t pixel_rate
, uint8_t bytes_per_pixel
,
2157 if (WARN(latency
== 0, "Latency value missing\n"))
2160 ret
= (uint64_t) pixel_rate
* bytes_per_pixel
* latency
;
2161 ret
= DIV_ROUND_UP_ULL(ret
, 64 * 10000) + 2;
2166 /* latency must be in 0.1us units. */
2167 static uint32_t ilk_wm_method2(uint32_t pixel_rate
, uint32_t pipe_htotal
,
2168 uint32_t horiz_pixels
, uint8_t bytes_per_pixel
,
2173 if (WARN(latency
== 0, "Latency value missing\n"))
2176 ret
= (latency
* pixel_rate
) / (pipe_htotal
* 10000);
2177 ret
= (ret
+ 1) * horiz_pixels
* bytes_per_pixel
;
2178 ret
= DIV_ROUND_UP(ret
, 64) + 2;
2182 static uint32_t ilk_wm_fbc(uint32_t pri_val
, uint32_t horiz_pixels
,
2183 uint8_t bytes_per_pixel
)
2185 return DIV_ROUND_UP(pri_val
* 64, horiz_pixels
* bytes_per_pixel
) + 2;
2188 struct hsw_pipe_wm_parameters
{
2190 uint32_t pipe_htotal
;
2191 uint32_t pixel_rate
;
2192 struct intel_plane_wm_parameters pri
;
2193 struct intel_plane_wm_parameters spr
;
2194 struct intel_plane_wm_parameters cur
;
2197 struct hsw_wm_maximums
{
2204 /* used in computing the new watermarks state */
2205 struct intel_wm_config
{
2206 unsigned int num_pipes_active
;
2207 bool sprites_enabled
;
2208 bool sprites_scaled
;
2212 * For both WM_PIPE and WM_LP.
2213 * mem_value must be in 0.1us units.
2215 static uint32_t ilk_compute_pri_wm(const struct hsw_pipe_wm_parameters
*params
,
2219 uint32_t method1
, method2
;
2221 if (!params
->active
|| !params
->pri
.enabled
)
2224 method1
= ilk_wm_method1(params
->pixel_rate
,
2225 params
->pri
.bytes_per_pixel
,
2231 method2
= ilk_wm_method2(params
->pixel_rate
,
2232 params
->pipe_htotal
,
2233 params
->pri
.horiz_pixels
,
2234 params
->pri
.bytes_per_pixel
,
2237 return min(method1
, method2
);
2241 * For both WM_PIPE and WM_LP.
2242 * mem_value must be in 0.1us units.
2244 static uint32_t ilk_compute_spr_wm(const struct hsw_pipe_wm_parameters
*params
,
2247 uint32_t method1
, method2
;
2249 if (!params
->active
|| !params
->spr
.enabled
)
2252 method1
= ilk_wm_method1(params
->pixel_rate
,
2253 params
->spr
.bytes_per_pixel
,
2255 method2
= ilk_wm_method2(params
->pixel_rate
,
2256 params
->pipe_htotal
,
2257 params
->spr
.horiz_pixels
,
2258 params
->spr
.bytes_per_pixel
,
2260 return min(method1
, method2
);
2264 * For both WM_PIPE and WM_LP.
2265 * mem_value must be in 0.1us units.
2267 static uint32_t ilk_compute_cur_wm(const struct hsw_pipe_wm_parameters
*params
,
2270 if (!params
->active
|| !params
->cur
.enabled
)
2273 return ilk_wm_method2(params
->pixel_rate
,
2274 params
->pipe_htotal
,
2275 params
->cur
.horiz_pixels
,
2276 params
->cur
.bytes_per_pixel
,
2280 /* Only for WM_LP. */
2281 static uint32_t ilk_compute_fbc_wm(const struct hsw_pipe_wm_parameters
*params
,
2284 if (!params
->active
|| !params
->pri
.enabled
)
2287 return ilk_wm_fbc(pri_val
,
2288 params
->pri
.horiz_pixels
,
2289 params
->pri
.bytes_per_pixel
);
2292 static unsigned int ilk_display_fifo_size(const struct drm_device
*dev
)
2294 if (INTEL_INFO(dev
)->gen
>= 7)
2300 /* Calculate the maximum primary/sprite plane watermark */
2301 static unsigned int ilk_plane_wm_max(const struct drm_device
*dev
,
2303 const struct intel_wm_config
*config
,
2304 enum intel_ddb_partitioning ddb_partitioning
,
2307 unsigned int fifo_size
= ilk_display_fifo_size(dev
);
2310 /* if sprites aren't enabled, sprites get nothing */
2311 if (is_sprite
&& !config
->sprites_enabled
)
2314 /* HSW allows LP1+ watermarks even with multiple pipes */
2315 if (level
== 0 || config
->num_pipes_active
> 1) {
2316 fifo_size
/= INTEL_INFO(dev
)->num_pipes
;
2319 * For some reason the non self refresh
2320 * FIFO size is only half of the self
2321 * refresh FIFO size on ILK/SNB.
2323 if (INTEL_INFO(dev
)->gen
<= 6)
2327 if (config
->sprites_enabled
) {
2328 /* level 0 is always calculated with 1:1 split */
2329 if (level
> 0 && ddb_partitioning
== INTEL_DDB_PART_5_6
) {
2338 /* clamp to max that the registers can hold */
2339 if (INTEL_INFO(dev
)->gen
>= 7)
2340 /* IVB/HSW primary/sprite plane watermarks */
2341 max
= level
== 0 ? 127 : 1023;
2342 else if (!is_sprite
)
2343 /* ILK/SNB primary plane watermarks */
2344 max
= level
== 0 ? 127 : 511;
2346 /* ILK/SNB sprite plane watermarks */
2347 max
= level
== 0 ? 63 : 255;
2349 return min(fifo_size
, max
);
2352 /* Calculate the maximum cursor plane watermark */
2353 static unsigned int ilk_cursor_wm_max(const struct drm_device
*dev
,
2355 const struct intel_wm_config
*config
)
2357 /* HSW LP1+ watermarks w/ multiple pipes */
2358 if (level
> 0 && config
->num_pipes_active
> 1)
2361 /* otherwise just report max that registers can hold */
2362 if (INTEL_INFO(dev
)->gen
>= 7)
2363 return level
== 0 ? 63 : 255;
2365 return level
== 0 ? 31 : 63;
2368 /* Calculate the maximum FBC watermark */
2369 static unsigned int ilk_fbc_wm_max(void)
2371 /* max that registers can hold */
2375 static void ilk_compute_wm_maximums(struct drm_device
*dev
,
2377 const struct intel_wm_config
*config
,
2378 enum intel_ddb_partitioning ddb_partitioning
,
2379 struct hsw_wm_maximums
*max
)
2381 max
->pri
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, false);
2382 max
->spr
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, true);
2383 max
->cur
= ilk_cursor_wm_max(dev
, level
, config
);
2384 max
->fbc
= ilk_fbc_wm_max();
2387 static bool ilk_validate_wm_level(int level
,
2388 const struct hsw_wm_maximums
*max
,
2389 struct intel_wm_level
*result
)
2393 /* already determined to be invalid? */
2394 if (!result
->enable
)
2397 result
->enable
= result
->pri_val
<= max
->pri
&&
2398 result
->spr_val
<= max
->spr
&&
2399 result
->cur_val
<= max
->cur
;
2401 ret
= result
->enable
;
2404 * HACK until we can pre-compute everything,
2405 * and thus fail gracefully if LP0 watermarks
2408 if (level
== 0 && !result
->enable
) {
2409 if (result
->pri_val
> max
->pri
)
2410 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
2411 level
, result
->pri_val
, max
->pri
);
2412 if (result
->spr_val
> max
->spr
)
2413 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2414 level
, result
->spr_val
, max
->spr
);
2415 if (result
->cur_val
> max
->cur
)
2416 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2417 level
, result
->cur_val
, max
->cur
);
2419 result
->pri_val
= min_t(uint32_t, result
->pri_val
, max
->pri
);
2420 result
->spr_val
= min_t(uint32_t, result
->spr_val
, max
->spr
);
2421 result
->cur_val
= min_t(uint32_t, result
->cur_val
, max
->cur
);
2422 result
->enable
= true;
2428 static void ilk_compute_wm_level(struct drm_i915_private
*dev_priv
,
2430 const struct hsw_pipe_wm_parameters
*p
,
2431 struct intel_wm_level
*result
)
2433 uint16_t pri_latency
= dev_priv
->wm
.pri_latency
[level
];
2434 uint16_t spr_latency
= dev_priv
->wm
.spr_latency
[level
];
2435 uint16_t cur_latency
= dev_priv
->wm
.cur_latency
[level
];
2437 /* WM1+ latency values stored in 0.5us units */
2444 result
->pri_val
= ilk_compute_pri_wm(p
, pri_latency
, level
);
2445 result
->spr_val
= ilk_compute_spr_wm(p
, spr_latency
);
2446 result
->cur_val
= ilk_compute_cur_wm(p
, cur_latency
);
2447 result
->fbc_val
= ilk_compute_fbc_wm(p
, result
->pri_val
);
2448 result
->enable
= true;
2452 hsw_compute_linetime_wm(struct drm_device
*dev
, struct drm_crtc
*crtc
)
2454 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2455 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2456 struct drm_display_mode
*mode
= &intel_crtc
->config
.adjusted_mode
;
2457 u32 linetime
, ips_linetime
;
2459 if (!intel_crtc_active(crtc
))
2462 /* The WM are computed with base on how long it takes to fill a single
2463 * row at the given clock rate, multiplied by 8.
2465 linetime
= DIV_ROUND_CLOSEST(mode
->htotal
* 1000 * 8, mode
->clock
);
2466 ips_linetime
= DIV_ROUND_CLOSEST(mode
->htotal
* 1000 * 8,
2467 intel_ddi_get_cdclk_freq(dev_priv
));
2469 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime
) |
2470 PIPE_WM_LINETIME_TIME(linetime
);
2473 static void intel_read_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2475 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2477 if (IS_HASWELL(dev
)) {
2478 uint64_t sskpd
= I915_READ64(MCH_SSKPD
);
2480 wm
[0] = (sskpd
>> 56) & 0xFF;
2482 wm
[0] = sskpd
& 0xF;
2483 wm
[1] = (sskpd
>> 4) & 0xFF;
2484 wm
[2] = (sskpd
>> 12) & 0xFF;
2485 wm
[3] = (sskpd
>> 20) & 0x1FF;
2486 wm
[4] = (sskpd
>> 32) & 0x1FF;
2487 } else if (INTEL_INFO(dev
)->gen
>= 6) {
2488 uint32_t sskpd
= I915_READ(MCH_SSKPD
);
2490 wm
[0] = (sskpd
>> SSKPD_WM0_SHIFT
) & SSKPD_WM_MASK
;
2491 wm
[1] = (sskpd
>> SSKPD_WM1_SHIFT
) & SSKPD_WM_MASK
;
2492 wm
[2] = (sskpd
>> SSKPD_WM2_SHIFT
) & SSKPD_WM_MASK
;
2493 wm
[3] = (sskpd
>> SSKPD_WM3_SHIFT
) & SSKPD_WM_MASK
;
2494 } else if (INTEL_INFO(dev
)->gen
>= 5) {
2495 uint32_t mltr
= I915_READ(MLTR_ILK
);
2497 /* ILK primary LP0 latency is 700 ns */
2499 wm
[1] = (mltr
>> MLTR_WM1_SHIFT
) & ILK_SRLT_MASK
;
2500 wm
[2] = (mltr
>> MLTR_WM2_SHIFT
) & ILK_SRLT_MASK
;
2504 static void intel_fixup_spr_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2506 /* ILK sprite LP0 latency is 1300 ns */
2507 if (INTEL_INFO(dev
)->gen
== 5)
2511 static void intel_fixup_cur_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2513 /* ILK cursor LP0 latency is 1300 ns */
2514 if (INTEL_INFO(dev
)->gen
== 5)
2517 /* WaDoubleCursorLP3Latency:ivb */
2518 if (IS_IVYBRIDGE(dev
))
2522 static int ilk_wm_max_level(const struct drm_device
*dev
)
2524 /* how many WM levels are we expecting */
2525 if (IS_HASWELL(dev
))
2527 else if (INTEL_INFO(dev
)->gen
>= 6)
2533 static void intel_print_wm_latency(struct drm_device
*dev
,
2535 const uint16_t wm
[5])
2537 int level
, max_level
= ilk_wm_max_level(dev
);
2539 for (level
= 0; level
<= max_level
; level
++) {
2540 unsigned int latency
= wm
[level
];
2543 DRM_ERROR("%s WM%d latency not provided\n",
2548 /* WM1+ latency values in 0.5us units */
2552 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2553 name
, level
, wm
[level
],
2554 latency
/ 10, latency
% 10);
2558 static void intel_setup_wm_latency(struct drm_device
*dev
)
2560 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2562 intel_read_wm_latency(dev
, dev_priv
->wm
.pri_latency
);
2564 memcpy(dev_priv
->wm
.spr_latency
, dev_priv
->wm
.pri_latency
,
2565 sizeof(dev_priv
->wm
.pri_latency
));
2566 memcpy(dev_priv
->wm
.cur_latency
, dev_priv
->wm
.pri_latency
,
2567 sizeof(dev_priv
->wm
.pri_latency
));
2569 intel_fixup_spr_wm_latency(dev
, dev_priv
->wm
.spr_latency
);
2570 intel_fixup_cur_wm_latency(dev
, dev_priv
->wm
.cur_latency
);
2572 intel_print_wm_latency(dev
, "Primary", dev_priv
->wm
.pri_latency
);
2573 intel_print_wm_latency(dev
, "Sprite", dev_priv
->wm
.spr_latency
);
2574 intel_print_wm_latency(dev
, "Cursor", dev_priv
->wm
.cur_latency
);
2577 static void hsw_compute_wm_parameters(struct drm_crtc
*crtc
,
2578 struct hsw_pipe_wm_parameters
*p
,
2579 struct intel_wm_config
*config
)
2581 struct drm_device
*dev
= crtc
->dev
;
2582 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2583 enum pipe pipe
= intel_crtc
->pipe
;
2584 struct drm_plane
*plane
;
2586 p
->active
= intel_crtc_active(crtc
);
2588 p
->pipe_htotal
= intel_crtc
->config
.adjusted_mode
.htotal
;
2589 p
->pixel_rate
= ilk_pipe_pixel_rate(dev
, crtc
);
2590 p
->pri
.bytes_per_pixel
= crtc
->fb
->bits_per_pixel
/ 8;
2591 p
->cur
.bytes_per_pixel
= 4;
2592 p
->pri
.horiz_pixels
= intel_crtc
->config
.pipe_src_w
;
2593 p
->cur
.horiz_pixels
= 64;
2594 /* TODO: for now, assume primary and cursor planes are always enabled. */
2595 p
->pri
.enabled
= true;
2596 p
->cur
.enabled
= true;
2599 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
2600 config
->num_pipes_active
+= intel_crtc_active(crtc
);
2602 list_for_each_entry(plane
, &dev
->mode_config
.plane_list
, head
) {
2603 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
2605 if (intel_plane
->pipe
== pipe
)
2606 p
->spr
= intel_plane
->wm
;
2608 config
->sprites_enabled
|= intel_plane
->wm
.enabled
;
2609 config
->sprites_scaled
|= intel_plane
->wm
.scaled
;
2613 /* Compute new watermarks for the pipe */
2614 static bool intel_compute_pipe_wm(struct drm_crtc
*crtc
,
2615 const struct hsw_pipe_wm_parameters
*params
,
2616 struct intel_pipe_wm
*pipe_wm
)
2618 struct drm_device
*dev
= crtc
->dev
;
2619 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2620 int level
, max_level
= ilk_wm_max_level(dev
);
2621 /* LP0 watermark maximums depend on this pipe alone */
2622 struct intel_wm_config config
= {
2623 .num_pipes_active
= 1,
2624 .sprites_enabled
= params
->spr
.enabled
,
2625 .sprites_scaled
= params
->spr
.scaled
,
2627 struct hsw_wm_maximums max
;
2629 /* LP0 watermarks always use 1/2 DDB partitioning */
2630 ilk_compute_wm_maximums(dev
, 0, &config
, INTEL_DDB_PART_1_2
, &max
);
2632 for (level
= 0; level
<= max_level
; level
++)
2633 ilk_compute_wm_level(dev_priv
, level
, params
,
2634 &pipe_wm
->wm
[level
]);
2636 pipe_wm
->linetime
= hsw_compute_linetime_wm(dev
, crtc
);
2638 /* At least LP0 must be valid */
2639 return ilk_validate_wm_level(0, &max
, &pipe_wm
->wm
[0]);
2643 * Merge the watermarks from all active pipes for a specific level.
2645 static void ilk_merge_wm_level(struct drm_device
*dev
,
2647 struct intel_wm_level
*ret_wm
)
2649 const struct intel_crtc
*intel_crtc
;
2651 list_for_each_entry(intel_crtc
, &dev
->mode_config
.crtc_list
, base
.head
) {
2652 const struct intel_wm_level
*wm
=
2653 &intel_crtc
->wm
.active
.wm
[level
];
2658 ret_wm
->pri_val
= max(ret_wm
->pri_val
, wm
->pri_val
);
2659 ret_wm
->spr_val
= max(ret_wm
->spr_val
, wm
->spr_val
);
2660 ret_wm
->cur_val
= max(ret_wm
->cur_val
, wm
->cur_val
);
2661 ret_wm
->fbc_val
= max(ret_wm
->fbc_val
, wm
->fbc_val
);
2664 ret_wm
->enable
= true;
2668 * Merge all low power watermarks for all active pipes.
2670 static void ilk_wm_merge(struct drm_device
*dev
,
2671 const struct hsw_wm_maximums
*max
,
2672 struct intel_pipe_wm
*merged
)
2674 int level
, max_level
= ilk_wm_max_level(dev
);
2676 merged
->fbc_wm_enabled
= true;
2678 /* merge each WM1+ level */
2679 for (level
= 1; level
<= max_level
; level
++) {
2680 struct intel_wm_level
*wm
= &merged
->wm
[level
];
2682 ilk_merge_wm_level(dev
, level
, wm
);
2684 if (!ilk_validate_wm_level(level
, max
, wm
))
2688 * The spec says it is preferred to disable
2689 * FBC WMs instead of disabling a WM level.
2691 if (wm
->fbc_val
> max
->fbc
) {
2692 merged
->fbc_wm_enabled
= false;
2698 static int ilk_wm_lp_to_level(int wm_lp
, const struct intel_pipe_wm
*pipe_wm
)
2700 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2701 return wm_lp
+ (wm_lp
>= 2 && pipe_wm
->wm
[4].enable
);
2704 static void hsw_compute_wm_results(struct drm_device
*dev
,
2705 const struct intel_pipe_wm
*merged
,
2706 enum intel_ddb_partitioning partitioning
,
2707 struct hsw_wm_values
*results
)
2709 struct intel_crtc
*intel_crtc
;
2712 results
->enable_fbc_wm
= merged
->fbc_wm_enabled
;
2713 results
->partitioning
= partitioning
;
2715 /* LP1+ register values */
2716 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2717 const struct intel_wm_level
*r
;
2719 level
= ilk_wm_lp_to_level(wm_lp
, merged
);
2721 r
= &merged
->wm
[level
];
2725 results
->wm_lp
[wm_lp
- 1] = HSW_WM_LP_VAL(level
* 2,
2729 results
->wm_lp_spr
[wm_lp
- 1] = r
->spr_val
;
2732 /* LP0 register values */
2733 list_for_each_entry(intel_crtc
, &dev
->mode_config
.crtc_list
, base
.head
) {
2734 enum pipe pipe
= intel_crtc
->pipe
;
2735 const struct intel_wm_level
*r
=
2736 &intel_crtc
->wm
.active
.wm
[0];
2738 if (WARN_ON(!r
->enable
))
2741 results
->wm_linetime
[pipe
] = intel_crtc
->wm
.active
.linetime
;
2743 results
->wm_pipe
[pipe
] =
2744 (r
->pri_val
<< WM0_PIPE_PLANE_SHIFT
) |
2745 (r
->spr_val
<< WM0_PIPE_SPRITE_SHIFT
) |
2750 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2751 * case both are at the same level. Prefer r1 in case they're the same. */
2752 static struct intel_pipe_wm
*hsw_find_best_result(struct drm_device
*dev
,
2753 struct intel_pipe_wm
*r1
,
2754 struct intel_pipe_wm
*r2
)
2756 int level
, max_level
= ilk_wm_max_level(dev
);
2757 int level1
= 0, level2
= 0;
2759 for (level
= 1; level
<= max_level
; level
++) {
2760 if (r1
->wm
[level
].enable
)
2762 if (r2
->wm
[level
].enable
)
2766 if (level1
== level2
) {
2767 if (r2
->fbc_wm_enabled
&& !r1
->fbc_wm_enabled
)
2771 } else if (level1
> level2
) {
2778 /* dirty bits used to track which watermarks need changes */
2779 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2780 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2781 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2782 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2783 #define WM_DIRTY_FBC (1 << 24)
2784 #define WM_DIRTY_DDB (1 << 25)
2786 static unsigned int ilk_compute_wm_dirty(struct drm_device
*dev
,
2787 const struct hsw_wm_values
*old
,
2788 const struct hsw_wm_values
*new)
2790 unsigned int dirty
= 0;
2794 for_each_pipe(pipe
) {
2795 if (old
->wm_linetime
[pipe
] != new->wm_linetime
[pipe
]) {
2796 dirty
|= WM_DIRTY_LINETIME(pipe
);
2797 /* Must disable LP1+ watermarks too */
2798 dirty
|= WM_DIRTY_LP_ALL
;
2801 if (old
->wm_pipe
[pipe
] != new->wm_pipe
[pipe
]) {
2802 dirty
|= WM_DIRTY_PIPE(pipe
);
2803 /* Must disable LP1+ watermarks too */
2804 dirty
|= WM_DIRTY_LP_ALL
;
2808 if (old
->enable_fbc_wm
!= new->enable_fbc_wm
) {
2809 dirty
|= WM_DIRTY_FBC
;
2810 /* Must disable LP1+ watermarks too */
2811 dirty
|= WM_DIRTY_LP_ALL
;
2814 if (old
->partitioning
!= new->partitioning
) {
2815 dirty
|= WM_DIRTY_DDB
;
2816 /* Must disable LP1+ watermarks too */
2817 dirty
|= WM_DIRTY_LP_ALL
;
2820 /* LP1+ watermarks already deemed dirty, no need to continue */
2821 if (dirty
& WM_DIRTY_LP_ALL
)
2824 /* Find the lowest numbered LP1+ watermark in need of an update... */
2825 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2826 if (old
->wm_lp
[wm_lp
- 1] != new->wm_lp
[wm_lp
- 1] ||
2827 old
->wm_lp_spr
[wm_lp
- 1] != new->wm_lp_spr
[wm_lp
- 1])
2831 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2832 for (; wm_lp
<= 3; wm_lp
++)
2833 dirty
|= WM_DIRTY_LP(wm_lp
);
2839 * The spec says we shouldn't write when we don't need, because every write
2840 * causes WMs to be re-evaluated, expending some power.
2842 static void hsw_write_wm_values(struct drm_i915_private
*dev_priv
,
2843 struct hsw_wm_values
*results
)
2845 struct hsw_wm_values
*previous
= &dev_priv
->wm
.hw
;
2849 dirty
= ilk_compute_wm_dirty(dev_priv
->dev
, previous
, results
);
2853 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp
[2] != 0)
2854 I915_WRITE(WM3_LP_ILK
, 0);
2855 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp
[1] != 0)
2856 I915_WRITE(WM2_LP_ILK
, 0);
2857 if (dirty
& WM_DIRTY_LP(1) && previous
->wm_lp
[0] != 0)
2858 I915_WRITE(WM1_LP_ILK
, 0);
2860 if (dirty
& WM_DIRTY_PIPE(PIPE_A
))
2861 I915_WRITE(WM0_PIPEA_ILK
, results
->wm_pipe
[0]);
2862 if (dirty
& WM_DIRTY_PIPE(PIPE_B
))
2863 I915_WRITE(WM0_PIPEB_ILK
, results
->wm_pipe
[1]);
2864 if (dirty
& WM_DIRTY_PIPE(PIPE_C
))
2865 I915_WRITE(WM0_PIPEC_IVB
, results
->wm_pipe
[2]);
2867 if (dirty
& WM_DIRTY_LINETIME(PIPE_A
))
2868 I915_WRITE(PIPE_WM_LINETIME(PIPE_A
), results
->wm_linetime
[0]);
2869 if (dirty
& WM_DIRTY_LINETIME(PIPE_B
))
2870 I915_WRITE(PIPE_WM_LINETIME(PIPE_B
), results
->wm_linetime
[1]);
2871 if (dirty
& WM_DIRTY_LINETIME(PIPE_C
))
2872 I915_WRITE(PIPE_WM_LINETIME(PIPE_C
), results
->wm_linetime
[2]);
2874 if (dirty
& WM_DIRTY_DDB
) {
2875 val
= I915_READ(WM_MISC
);
2876 if (results
->partitioning
== INTEL_DDB_PART_1_2
)
2877 val
&= ~WM_MISC_DATA_PARTITION_5_6
;
2879 val
|= WM_MISC_DATA_PARTITION_5_6
;
2880 I915_WRITE(WM_MISC
, val
);
2883 if (dirty
& WM_DIRTY_FBC
) {
2884 val
= I915_READ(DISP_ARB_CTL
);
2885 if (results
->enable_fbc_wm
)
2886 val
&= ~DISP_FBC_WM_DIS
;
2888 val
|= DISP_FBC_WM_DIS
;
2889 I915_WRITE(DISP_ARB_CTL
, val
);
2892 if (dirty
& WM_DIRTY_LP(1) && previous
->wm_lp_spr
[0] != results
->wm_lp_spr
[0])
2893 I915_WRITE(WM1S_LP_ILK
, results
->wm_lp_spr
[0]);
2894 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp_spr
[1] != results
->wm_lp_spr
[1])
2895 I915_WRITE(WM2S_LP_IVB
, results
->wm_lp_spr
[1]);
2896 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp_spr
[2] != results
->wm_lp_spr
[2])
2897 I915_WRITE(WM3S_LP_IVB
, results
->wm_lp_spr
[2]);
2899 if (dirty
& WM_DIRTY_LP(1) && results
->wm_lp
[0] != 0)
2900 I915_WRITE(WM1_LP_ILK
, results
->wm_lp
[0]);
2901 if (dirty
& WM_DIRTY_LP(2) && results
->wm_lp
[1] != 0)
2902 I915_WRITE(WM2_LP_ILK
, results
->wm_lp
[1]);
2903 if (dirty
& WM_DIRTY_LP(3) && results
->wm_lp
[2] != 0)
2904 I915_WRITE(WM3_LP_ILK
, results
->wm_lp
[2]);
2906 dev_priv
->wm
.hw
= *results
;
2909 static void haswell_update_wm(struct drm_crtc
*crtc
)
2911 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2912 struct drm_device
*dev
= crtc
->dev
;
2913 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2914 struct hsw_wm_maximums max
;
2915 struct hsw_pipe_wm_parameters params
= {};
2916 struct hsw_wm_values results
= {};
2917 enum intel_ddb_partitioning partitioning
;
2918 struct intel_pipe_wm pipe_wm
= {};
2919 struct intel_pipe_wm lp_wm_1_2
= {}, lp_wm_5_6
= {}, *best_lp_wm
;
2920 struct intel_wm_config config
= {};
2922 hsw_compute_wm_parameters(crtc
, ¶ms
, &config
);
2924 intel_compute_pipe_wm(crtc
, ¶ms
, &pipe_wm
);
2926 if (!memcmp(&intel_crtc
->wm
.active
, &pipe_wm
, sizeof(pipe_wm
)))
2929 intel_crtc
->wm
.active
= pipe_wm
;
2931 ilk_compute_wm_maximums(dev
, 1, &config
, INTEL_DDB_PART_1_2
, &max
);
2932 ilk_wm_merge(dev
, &max
, &lp_wm_1_2
);
2934 /* 5/6 split only in single pipe config on IVB+ */
2935 if (INTEL_INFO(dev
)->gen
>= 7 &&
2936 config
.num_pipes_active
== 1 && config
.sprites_enabled
) {
2937 ilk_compute_wm_maximums(dev
, 1, &config
, INTEL_DDB_PART_5_6
, &max
);
2938 ilk_wm_merge(dev
, &max
, &lp_wm_5_6
);
2940 best_lp_wm
= hsw_find_best_result(dev
, &lp_wm_1_2
, &lp_wm_5_6
);
2942 best_lp_wm
= &lp_wm_1_2
;
2945 partitioning
= (best_lp_wm
== &lp_wm_1_2
) ?
2946 INTEL_DDB_PART_1_2
: INTEL_DDB_PART_5_6
;
2948 hsw_compute_wm_results(dev
, best_lp_wm
, partitioning
, &results
);
2950 hsw_write_wm_values(dev_priv
, &results
);
2953 static void haswell_update_sprite_wm(struct drm_plane
*plane
,
2954 struct drm_crtc
*crtc
,
2955 uint32_t sprite_width
, int pixel_size
,
2956 bool enabled
, bool scaled
)
2958 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
2960 intel_plane
->wm
.enabled
= enabled
;
2961 intel_plane
->wm
.scaled
= scaled
;
2962 intel_plane
->wm
.horiz_pixels
= sprite_width
;
2963 intel_plane
->wm
.bytes_per_pixel
= pixel_size
;
2965 haswell_update_wm(crtc
);
2969 sandybridge_compute_sprite_wm(struct drm_device
*dev
, int plane
,
2970 uint32_t sprite_width
, int pixel_size
,
2971 const struct intel_watermark_params
*display
,
2972 int display_latency_ns
, int *sprite_wm
)
2974 struct drm_crtc
*crtc
;
2976 int entries
, tlb_miss
;
2978 crtc
= intel_get_crtc_for_plane(dev
, plane
);
2979 if (!intel_crtc_active(crtc
)) {
2980 *sprite_wm
= display
->guard_size
;
2984 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
2986 /* Use the small buffer method to calculate the sprite watermark */
2987 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
2988 tlb_miss
= display
->fifo_size
*display
->cacheline_size
-
2991 entries
+= tlb_miss
;
2992 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
2993 *sprite_wm
= entries
+ display
->guard_size
;
2994 if (*sprite_wm
> (int)display
->max_wm
)
2995 *sprite_wm
= display
->max_wm
;
3001 sandybridge_compute_sprite_srwm(struct drm_device
*dev
, int plane
,
3002 uint32_t sprite_width
, int pixel_size
,
3003 const struct intel_watermark_params
*display
,
3004 int latency_ns
, int *sprite_wm
)
3006 struct drm_crtc
*crtc
;
3007 unsigned long line_time_us
;
3009 int line_count
, line_size
;
3018 crtc
= intel_get_crtc_for_plane(dev
, plane
);
3019 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
3025 line_time_us
= (sprite_width
* 1000) / clock
;
3026 if (!line_time_us
) {
3031 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
3032 line_size
= sprite_width
* pixel_size
;
3034 /* Use the minimum of the small and large buffer method for primary */
3035 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
3036 large
= line_count
* line_size
;
3038 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
3039 *sprite_wm
= entries
+ display
->guard_size
;
3041 return *sprite_wm
> 0x3ff ? false : true;
3044 static void sandybridge_update_sprite_wm(struct drm_plane
*plane
,
3045 struct drm_crtc
*crtc
,
3046 uint32_t sprite_width
, int pixel_size
,
3047 bool enabled
, bool scaled
)
3049 struct drm_device
*dev
= plane
->dev
;
3050 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3051 int pipe
= to_intel_plane(plane
)->pipe
;
3052 int latency
= dev_priv
->wm
.spr_latency
[0] * 100; /* In unit 0.1us */
3062 reg
= WM0_PIPEA_ILK
;
3065 reg
= WM0_PIPEB_ILK
;
3068 reg
= WM0_PIPEC_IVB
;
3071 return; /* bad pipe */
3074 ret
= sandybridge_compute_sprite_wm(dev
, pipe
, sprite_width
, pixel_size
,
3075 &sandybridge_display_wm_info
,
3076 latency
, &sprite_wm
);
3078 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %c\n",
3083 val
= I915_READ(reg
);
3084 val
&= ~WM0_PIPE_SPRITE_MASK
;
3085 I915_WRITE(reg
, val
| (sprite_wm
<< WM0_PIPE_SPRITE_SHIFT
));
3086 DRM_DEBUG_KMS("sprite watermarks For pipe %c - %d\n", pipe_name(pipe
), sprite_wm
);
3089 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3091 &sandybridge_display_srwm_info
,
3092 dev_priv
->wm
.spr_latency
[1] * 500,
3095 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n",
3099 I915_WRITE(WM1S_LP_ILK
, sprite_wm
);
3101 /* Only IVB has two more LP watermarks for sprite */
3102 if (!IS_IVYBRIDGE(dev
))
3105 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3107 &sandybridge_display_srwm_info
,
3108 dev_priv
->wm
.spr_latency
[2] * 500,
3111 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n",
3115 I915_WRITE(WM2S_LP_IVB
, sprite_wm
);
3117 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3119 &sandybridge_display_srwm_info
,
3120 dev_priv
->wm
.spr_latency
[3] * 500,
3123 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n",
3127 I915_WRITE(WM3S_LP_IVB
, sprite_wm
);
3130 static void ilk_pipe_wm_get_hw_state(struct drm_crtc
*crtc
)
3132 struct drm_device
*dev
= crtc
->dev
;
3133 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3134 struct hsw_wm_values
*hw
= &dev_priv
->wm
.hw
;
3135 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
3136 struct intel_pipe_wm
*active
= &intel_crtc
->wm
.active
;
3137 enum pipe pipe
= intel_crtc
->pipe
;
3138 static const unsigned int wm0_pipe_reg
[] = {
3139 [PIPE_A
] = WM0_PIPEA_ILK
,
3140 [PIPE_B
] = WM0_PIPEB_ILK
,
3141 [PIPE_C
] = WM0_PIPEC_IVB
,
3144 hw
->wm_pipe
[pipe
] = I915_READ(wm0_pipe_reg
[pipe
]);
3145 hw
->wm_linetime
[pipe
] = I915_READ(PIPE_WM_LINETIME(pipe
));
3147 if (intel_crtc_active(crtc
)) {
3148 u32 tmp
= hw
->wm_pipe
[pipe
];
3151 * For active pipes LP0 watermark is marked as
3152 * enabled, and LP1+ watermaks as disabled since
3153 * we can't really reverse compute them in case
3154 * multiple pipes are active.
3156 active
->wm
[0].enable
= true;
3157 active
->wm
[0].pri_val
= (tmp
& WM0_PIPE_PLANE_MASK
) >> WM0_PIPE_PLANE_SHIFT
;
3158 active
->wm
[0].spr_val
= (tmp
& WM0_PIPE_SPRITE_MASK
) >> WM0_PIPE_SPRITE_SHIFT
;
3159 active
->wm
[0].cur_val
= tmp
& WM0_PIPE_CURSOR_MASK
;
3160 active
->linetime
= hw
->wm_linetime
[pipe
];
3162 int level
, max_level
= ilk_wm_max_level(dev
);
3165 * For inactive pipes, all watermark levels
3166 * should be marked as enabled but zeroed,
3167 * which is what we'd compute them to.
3169 for (level
= 0; level
<= max_level
; level
++)
3170 active
->wm
[level
].enable
= true;
3174 void ilk_wm_get_hw_state(struct drm_device
*dev
)
3176 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3177 struct hsw_wm_values
*hw
= &dev_priv
->wm
.hw
;
3178 struct drm_crtc
*crtc
;
3180 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
3181 ilk_pipe_wm_get_hw_state(crtc
);
3183 hw
->wm_lp
[0] = I915_READ(WM1_LP_ILK
);
3184 hw
->wm_lp
[1] = I915_READ(WM2_LP_ILK
);
3185 hw
->wm_lp
[2] = I915_READ(WM3_LP_ILK
);
3187 hw
->wm_lp_spr
[0] = I915_READ(WM1S_LP_ILK
);
3188 hw
->wm_lp_spr
[1] = I915_READ(WM2S_LP_IVB
);
3189 hw
->wm_lp_spr
[2] = I915_READ(WM3S_LP_IVB
);
3191 hw
->partitioning
= (I915_READ(WM_MISC
) & WM_MISC_DATA_PARTITION_5_6
) ?
3192 INTEL_DDB_PART_5_6
: INTEL_DDB_PART_1_2
;
3195 !(I915_READ(DISP_ARB_CTL
) & DISP_FBC_WM_DIS
);
3199 * intel_update_watermarks - update FIFO watermark values based on current modes
3201 * Calculate watermark values for the various WM regs based on current mode
3202 * and plane configuration.
3204 * There are several cases to deal with here:
3205 * - normal (i.e. non-self-refresh)
3206 * - self-refresh (SR) mode
3207 * - lines are large relative to FIFO size (buffer can hold up to 2)
3208 * - lines are small relative to FIFO size (buffer can hold more than 2
3209 * lines), so need to account for TLB latency
3211 * The normal calculation is:
3212 * watermark = dotclock * bytes per pixel * latency
3213 * where latency is platform & configuration dependent (we assume pessimal
3216 * The SR calculation is:
3217 * watermark = (trunc(latency/line time)+1) * surface width *
3220 * line time = htotal / dotclock
3221 * surface width = hdisplay for normal plane and 64 for cursor
3222 * and latency is assumed to be high, as above.
3224 * The final value programmed to the register should always be rounded up,
3225 * and include an extra 2 entries to account for clock crossings.
3227 * We don't use the sprite, so we can ignore that. And on Crestline we have
3228 * to set the non-SR watermarks to 8.
3230 void intel_update_watermarks(struct drm_crtc
*crtc
)
3232 struct drm_i915_private
*dev_priv
= crtc
->dev
->dev_private
;
3234 if (dev_priv
->display
.update_wm
)
3235 dev_priv
->display
.update_wm(crtc
);
3238 void intel_update_sprite_watermarks(struct drm_plane
*plane
,
3239 struct drm_crtc
*crtc
,
3240 uint32_t sprite_width
, int pixel_size
,
3241 bool enabled
, bool scaled
)
3243 struct drm_i915_private
*dev_priv
= plane
->dev
->dev_private
;
3245 if (dev_priv
->display
.update_sprite_wm
)
3246 dev_priv
->display
.update_sprite_wm(plane
, crtc
, sprite_width
,
3247 pixel_size
, enabled
, scaled
);
3250 static struct drm_i915_gem_object
*
3251 intel_alloc_context_page(struct drm_device
*dev
)
3253 struct drm_i915_gem_object
*ctx
;
3256 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
3258 ctx
= i915_gem_alloc_object(dev
, 4096);
3260 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
3264 ret
= i915_gem_obj_ggtt_pin(ctx
, 4096, true, false);
3266 DRM_ERROR("failed to pin power context: %d\n", ret
);
3270 ret
= i915_gem_object_set_to_gtt_domain(ctx
, 1);
3272 DRM_ERROR("failed to set-domain on power context: %d\n", ret
);
3279 i915_gem_object_unpin(ctx
);
3281 drm_gem_object_unreference(&ctx
->base
);
3286 * Lock protecting IPS related data structures
3288 DEFINE_SPINLOCK(mchdev_lock
);
3290 /* Global for IPS driver to get at the current i915 device. Protected by
3292 static struct drm_i915_private
*i915_mch_dev
;
3294 bool ironlake_set_drps(struct drm_device
*dev
, u8 val
)
3296 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3299 assert_spin_locked(&mchdev_lock
);
3301 rgvswctl
= I915_READ16(MEMSWCTL
);
3302 if (rgvswctl
& MEMCTL_CMD_STS
) {
3303 DRM_DEBUG("gpu busy, RCS change rejected\n");
3304 return false; /* still busy with another command */
3307 rgvswctl
= (MEMCTL_CMD_CHFREQ
<< MEMCTL_CMD_SHIFT
) |
3308 (val
<< MEMCTL_FREQ_SHIFT
) | MEMCTL_SFCAVM
;
3309 I915_WRITE16(MEMSWCTL
, rgvswctl
);
3310 POSTING_READ16(MEMSWCTL
);
3312 rgvswctl
|= MEMCTL_CMD_STS
;
3313 I915_WRITE16(MEMSWCTL
, rgvswctl
);
3318 static void ironlake_enable_drps(struct drm_device
*dev
)
3320 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3321 u32 rgvmodectl
= I915_READ(MEMMODECTL
);
3322 u8 fmax
, fmin
, fstart
, vstart
;
3324 spin_lock_irq(&mchdev_lock
);
3326 /* Enable temp reporting */
3327 I915_WRITE16(PMMISC
, I915_READ(PMMISC
) | MCPPCE_EN
);
3328 I915_WRITE16(TSC1
, I915_READ(TSC1
) | TSE
);
3330 /* 100ms RC evaluation intervals */
3331 I915_WRITE(RCUPEI
, 100000);
3332 I915_WRITE(RCDNEI
, 100000);
3334 /* Set max/min thresholds to 90ms and 80ms respectively */
3335 I915_WRITE(RCBMAXAVG
, 90000);
3336 I915_WRITE(RCBMINAVG
, 80000);
3338 I915_WRITE(MEMIHYST
, 1);
3340 /* Set up min, max, and cur for interrupt handling */
3341 fmax
= (rgvmodectl
& MEMMODE_FMAX_MASK
) >> MEMMODE_FMAX_SHIFT
;
3342 fmin
= (rgvmodectl
& MEMMODE_FMIN_MASK
);
3343 fstart
= (rgvmodectl
& MEMMODE_FSTART_MASK
) >>
3344 MEMMODE_FSTART_SHIFT
;
3346 vstart
= (I915_READ(PXVFREQ_BASE
+ (fstart
* 4)) & PXVFREQ_PX_MASK
) >>
3349 dev_priv
->ips
.fmax
= fmax
; /* IPS callback will increase this */
3350 dev_priv
->ips
.fstart
= fstart
;
3352 dev_priv
->ips
.max_delay
= fstart
;
3353 dev_priv
->ips
.min_delay
= fmin
;
3354 dev_priv
->ips
.cur_delay
= fstart
;
3356 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
3357 fmax
, fmin
, fstart
);
3359 I915_WRITE(MEMINTREN
, MEMINT_CX_SUPR_EN
| MEMINT_EVAL_CHG_EN
);
3362 * Interrupts will be enabled in ironlake_irq_postinstall
3365 I915_WRITE(VIDSTART
, vstart
);
3366 POSTING_READ(VIDSTART
);
3368 rgvmodectl
|= MEMMODE_SWMODE_EN
;
3369 I915_WRITE(MEMMODECTL
, rgvmodectl
);
3371 if (wait_for_atomic((I915_READ(MEMSWCTL
) & MEMCTL_CMD_STS
) == 0, 10))
3372 DRM_ERROR("stuck trying to change perf mode\n");
3375 ironlake_set_drps(dev
, fstart
);
3377 dev_priv
->ips
.last_count1
= I915_READ(0x112e4) + I915_READ(0x112e8) +
3379 dev_priv
->ips
.last_time1
= jiffies_to_msecs(jiffies
);
3380 dev_priv
->ips
.last_count2
= I915_READ(0x112f4);
3381 getrawmonotonic(&dev_priv
->ips
.last_time2
);
3383 spin_unlock_irq(&mchdev_lock
);
3386 static void ironlake_disable_drps(struct drm_device
*dev
)
3388 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3391 spin_lock_irq(&mchdev_lock
);
3393 rgvswctl
= I915_READ16(MEMSWCTL
);
3395 /* Ack interrupts, disable EFC interrupt */
3396 I915_WRITE(MEMINTREN
, I915_READ(MEMINTREN
) & ~MEMINT_EVAL_CHG_EN
);
3397 I915_WRITE(MEMINTRSTS
, MEMINT_EVAL_CHG
);
3398 I915_WRITE(DEIER
, I915_READ(DEIER
) & ~DE_PCU_EVENT
);
3399 I915_WRITE(DEIIR
, DE_PCU_EVENT
);
3400 I915_WRITE(DEIMR
, I915_READ(DEIMR
) | DE_PCU_EVENT
);
3402 /* Go back to the starting frequency */
3403 ironlake_set_drps(dev
, dev_priv
->ips
.fstart
);
3405 rgvswctl
|= MEMCTL_CMD_STS
;
3406 I915_WRITE(MEMSWCTL
, rgvswctl
);
3409 spin_unlock_irq(&mchdev_lock
);
3412 /* There's a funny hw issue where the hw returns all 0 when reading from
3413 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
3414 * ourselves, instead of doing a rmw cycle (which might result in us clearing
3415 * all limits and the gpu stuck at whatever frequency it is at atm).
3417 static u32
gen6_rps_limits(struct drm_i915_private
*dev_priv
, u8
*val
)
3423 if (*val
>= dev_priv
->rps
.max_delay
)
3424 *val
= dev_priv
->rps
.max_delay
;
3425 limits
|= dev_priv
->rps
.max_delay
<< 24;
3427 /* Only set the down limit when we've reached the lowest level to avoid
3428 * getting more interrupts, otherwise leave this clear. This prevents a
3429 * race in the hw when coming out of rc6: There's a tiny window where
3430 * the hw runs at the minimal clock before selecting the desired
3431 * frequency, if the down threshold expires in that window we will not
3432 * receive a down interrupt. */
3433 if (*val
<= dev_priv
->rps
.min_delay
) {
3434 *val
= dev_priv
->rps
.min_delay
;
3435 limits
|= dev_priv
->rps
.min_delay
<< 16;
3441 static void gen6_set_rps_thresholds(struct drm_i915_private
*dev_priv
, u8 val
)
3445 new_power
= dev_priv
->rps
.power
;
3446 switch (dev_priv
->rps
.power
) {
3448 if (val
> dev_priv
->rps
.rpe_delay
+ 1 && val
> dev_priv
->rps
.cur_delay
)
3449 new_power
= BETWEEN
;
3453 if (val
<= dev_priv
->rps
.rpe_delay
&& val
< dev_priv
->rps
.cur_delay
)
3454 new_power
= LOW_POWER
;
3455 else if (val
>= dev_priv
->rps
.rp0_delay
&& val
> dev_priv
->rps
.cur_delay
)
3456 new_power
= HIGH_POWER
;
3460 if (val
< (dev_priv
->rps
.rp1_delay
+ dev_priv
->rps
.rp0_delay
) >> 1 && val
< dev_priv
->rps
.cur_delay
)
3461 new_power
= BETWEEN
;
3464 /* Max/min bins are special */
3465 if (val
== dev_priv
->rps
.min_delay
)
3466 new_power
= LOW_POWER
;
3467 if (val
== dev_priv
->rps
.max_delay
)
3468 new_power
= HIGH_POWER
;
3469 if (new_power
== dev_priv
->rps
.power
)
3472 /* Note the units here are not exactly 1us, but 1280ns. */
3473 switch (new_power
) {
3475 /* Upclock if more than 95% busy over 16ms */
3476 I915_WRITE(GEN6_RP_UP_EI
, 12500);
3477 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 11800);
3479 /* Downclock if less than 85% busy over 32ms */
3480 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3481 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 21250);
3483 I915_WRITE(GEN6_RP_CONTROL
,
3484 GEN6_RP_MEDIA_TURBO
|
3485 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3486 GEN6_RP_MEDIA_IS_GFX
|
3488 GEN6_RP_UP_BUSY_AVG
|
3489 GEN6_RP_DOWN_IDLE_AVG
);
3493 /* Upclock if more than 90% busy over 13ms */
3494 I915_WRITE(GEN6_RP_UP_EI
, 10250);
3495 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 9225);
3497 /* Downclock if less than 75% busy over 32ms */
3498 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3499 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 18750);
3501 I915_WRITE(GEN6_RP_CONTROL
,
3502 GEN6_RP_MEDIA_TURBO
|
3503 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3504 GEN6_RP_MEDIA_IS_GFX
|
3506 GEN6_RP_UP_BUSY_AVG
|
3507 GEN6_RP_DOWN_IDLE_AVG
);
3511 /* Upclock if more than 85% busy over 10ms */
3512 I915_WRITE(GEN6_RP_UP_EI
, 8000);
3513 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 6800);
3515 /* Downclock if less than 60% busy over 32ms */
3516 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3517 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 15000);
3519 I915_WRITE(GEN6_RP_CONTROL
,
3520 GEN6_RP_MEDIA_TURBO
|
3521 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3522 GEN6_RP_MEDIA_IS_GFX
|
3524 GEN6_RP_UP_BUSY_AVG
|
3525 GEN6_RP_DOWN_IDLE_AVG
);
3529 dev_priv
->rps
.power
= new_power
;
3530 dev_priv
->rps
.last_adj
= 0;
3533 void gen6_set_rps(struct drm_device
*dev
, u8 val
)
3535 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3536 u32 limits
= gen6_rps_limits(dev_priv
, &val
);
3538 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3539 WARN_ON(val
> dev_priv
->rps
.max_delay
);
3540 WARN_ON(val
< dev_priv
->rps
.min_delay
);
3542 if (val
== dev_priv
->rps
.cur_delay
)
3545 gen6_set_rps_thresholds(dev_priv
, val
);
3547 if (IS_HASWELL(dev
))
3548 I915_WRITE(GEN6_RPNSWREQ
,
3549 HSW_FREQUENCY(val
));
3551 I915_WRITE(GEN6_RPNSWREQ
,
3552 GEN6_FREQUENCY(val
) |
3554 GEN6_AGGRESSIVE_TURBO
);
3556 /* Make sure we continue to get interrupts
3557 * until we hit the minimum or maximum frequencies.
3559 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
, limits
);
3561 POSTING_READ(GEN6_RPNSWREQ
);
3563 dev_priv
->rps
.cur_delay
= val
;
3565 trace_intel_gpu_freq_change(val
* 50);
3568 void gen6_rps_idle(struct drm_i915_private
*dev_priv
)
3570 mutex_lock(&dev_priv
->rps
.hw_lock
);
3571 if (dev_priv
->rps
.enabled
) {
3572 if (dev_priv
->info
->is_valleyview
)
3573 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3575 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3576 dev_priv
->rps
.last_adj
= 0;
3578 mutex_unlock(&dev_priv
->rps
.hw_lock
);
3581 void gen6_rps_boost(struct drm_i915_private
*dev_priv
)
3583 mutex_lock(&dev_priv
->rps
.hw_lock
);
3584 if (dev_priv
->rps
.enabled
) {
3585 if (dev_priv
->info
->is_valleyview
)
3586 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.max_delay
);
3588 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.max_delay
);
3589 dev_priv
->rps
.last_adj
= 0;
3591 mutex_unlock(&dev_priv
->rps
.hw_lock
);
3595 * Wait until the previous freq change has completed,
3596 * or the timeout elapsed, and then update our notion
3597 * of the current GPU frequency.
3599 static void vlv_update_rps_cur_delay(struct drm_i915_private
*dev_priv
)
3603 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3605 if (wait_for(((pval
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
)) & GENFREQSTATUS
) == 0, 10))
3606 DRM_DEBUG_DRIVER("timed out waiting for Punit\n");
3610 if (pval
!= dev_priv
->rps
.cur_delay
)
3611 DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n",
3612 vlv_gpu_freq(dev_priv
->mem_freq
, dev_priv
->rps
.cur_delay
),
3613 dev_priv
->rps
.cur_delay
,
3614 vlv_gpu_freq(dev_priv
->mem_freq
, pval
), pval
);
3616 dev_priv
->rps
.cur_delay
= pval
;
3619 void valleyview_set_rps(struct drm_device
*dev
, u8 val
)
3621 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3623 gen6_rps_limits(dev_priv
, &val
);
3625 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3626 WARN_ON(val
> dev_priv
->rps
.max_delay
);
3627 WARN_ON(val
< dev_priv
->rps
.min_delay
);
3629 vlv_update_rps_cur_delay(dev_priv
);
3631 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3632 vlv_gpu_freq(dev_priv
->mem_freq
,
3633 dev_priv
->rps
.cur_delay
),
3634 dev_priv
->rps
.cur_delay
,
3635 vlv_gpu_freq(dev_priv
->mem_freq
, val
), val
);
3637 if (val
== dev_priv
->rps
.cur_delay
)
3640 vlv_punit_write(dev_priv
, PUNIT_REG_GPU_FREQ_REQ
, val
);
3642 dev_priv
->rps
.cur_delay
= val
;
3644 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv
->mem_freq
, val
));
3647 static void gen6_disable_rps_interrupts(struct drm_device
*dev
)
3649 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3651 I915_WRITE(GEN6_PMINTRMSK
, 0xffffffff);
3652 I915_WRITE(GEN6_PMIER
, I915_READ(GEN6_PMIER
) & ~GEN6_PM_RPS_EVENTS
);
3653 /* Complete PM interrupt masking here doesn't race with the rps work
3654 * item again unmasking PM interrupts because that is using a different
3655 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3656 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3658 spin_lock_irq(&dev_priv
->irq_lock
);
3659 dev_priv
->rps
.pm_iir
= 0;
3660 spin_unlock_irq(&dev_priv
->irq_lock
);
3662 I915_WRITE(GEN6_PMIIR
, GEN6_PM_RPS_EVENTS
);
3665 static void gen6_disable_rps(struct drm_device
*dev
)
3667 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3669 I915_WRITE(GEN6_RC_CONTROL
, 0);
3670 I915_WRITE(GEN6_RPNSWREQ
, 1 << 31);
3672 gen6_disable_rps_interrupts(dev
);
3675 static void valleyview_disable_rps(struct drm_device
*dev
)
3677 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3679 I915_WRITE(GEN6_RC_CONTROL
, 0);
3681 gen6_disable_rps_interrupts(dev
);
3683 if (dev_priv
->vlv_pctx
) {
3684 drm_gem_object_unreference(&dev_priv
->vlv_pctx
->base
);
3685 dev_priv
->vlv_pctx
= NULL
;
3689 static void intel_print_rc6_info(struct drm_device
*dev
, u32 mode
)
3692 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3694 if (IS_HASWELL(dev
))
3695 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3697 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3698 (mode
& GEN6_RC_CTL_RC6_ENABLE
) ? "on" : "off",
3699 (mode
& GEN6_RC_CTL_RC6p_ENABLE
) ? "on" : "off",
3700 (mode
& GEN6_RC_CTL_RC6pp_ENABLE
) ? "on" : "off");
3703 int intel_enable_rc6(const struct drm_device
*dev
)
3705 /* No RC6 before Ironlake */
3706 if (INTEL_INFO(dev
)->gen
< 5)
3709 /* Respect the kernel parameter if it is set */
3710 if (i915_enable_rc6
>= 0)
3711 return i915_enable_rc6
;
3713 /* Disable RC6 on Ironlake */
3714 if (INTEL_INFO(dev
)->gen
== 5)
3717 if (IS_HASWELL(dev
))
3718 return INTEL_RC6_ENABLE
;
3720 /* snb/ivb have more than one rc6 state. */
3721 if (INTEL_INFO(dev
)->gen
== 6)
3722 return INTEL_RC6_ENABLE
;
3724 return (INTEL_RC6_ENABLE
| INTEL_RC6p_ENABLE
);
3727 static void gen6_enable_rps_interrupts(struct drm_device
*dev
)
3729 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3732 spin_lock_irq(&dev_priv
->irq_lock
);
3733 WARN_ON(dev_priv
->rps
.pm_iir
);
3734 snb_enable_pm_irq(dev_priv
, GEN6_PM_RPS_EVENTS
);
3735 I915_WRITE(GEN6_PMIIR
, GEN6_PM_RPS_EVENTS
);
3736 spin_unlock_irq(&dev_priv
->irq_lock
);
3738 /* only unmask PM interrupts we need. Mask all others. */
3739 enabled_intrs
= GEN6_PM_RPS_EVENTS
;
3741 /* IVB and SNB hard hangs on looping batchbuffer
3742 * if GEN6_PM_UP_EI_EXPIRED is masked.
3744 if (INTEL_INFO(dev
)->gen
<= 7 && !IS_HASWELL(dev
))
3745 enabled_intrs
|= GEN6_PM_RP_UP_EI_EXPIRED
;
3747 I915_WRITE(GEN6_PMINTRMSK
, ~enabled_intrs
);
3750 static void gen6_enable_rps(struct drm_device
*dev
)
3752 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3753 struct intel_ring_buffer
*ring
;
3756 u32 rc6vids
, pcu_mbox
, rc6_mask
= 0;
3761 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3763 /* Here begins a magic sequence of register writes to enable
3764 * auto-downclocking.
3766 * Perhaps there might be some value in exposing these to
3769 I915_WRITE(GEN6_RC_STATE
, 0);
3771 /* Clear the DBG now so we don't confuse earlier errors */
3772 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
3773 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg
);
3774 I915_WRITE(GTFIFODBG
, gtfifodbg
);
3777 gen6_gt_force_wake_get(dev_priv
);
3779 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
3780 gt_perf_status
= I915_READ(GEN6_GT_PERF_STATUS
);
3782 /* In units of 50MHz */
3783 dev_priv
->rps
.hw_max
= dev_priv
->rps
.max_delay
= rp_state_cap
& 0xff;
3784 dev_priv
->rps
.min_delay
= (rp_state_cap
>> 16) & 0xff;
3785 dev_priv
->rps
.rp1_delay
= (rp_state_cap
>> 8) & 0xff;
3786 dev_priv
->rps
.rp0_delay
= (rp_state_cap
>> 0) & 0xff;
3787 dev_priv
->rps
.rpe_delay
= dev_priv
->rps
.rp1_delay
;
3788 dev_priv
->rps
.cur_delay
= 0;
3790 /* disable the counters and set deterministic thresholds */
3791 I915_WRITE(GEN6_RC_CONTROL
, 0);
3793 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT
, 1000 << 16);
3794 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16 | 30);
3795 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT
, 30);
3796 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
3797 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
3799 for_each_ring(ring
, dev_priv
, i
)
3800 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
3802 I915_WRITE(GEN6_RC_SLEEP
, 0);
3803 I915_WRITE(GEN6_RC1e_THRESHOLD
, 1000);
3804 if (INTEL_INFO(dev
)->gen
<= 6 || IS_IVYBRIDGE(dev
))
3805 I915_WRITE(GEN6_RC6_THRESHOLD
, 125000);
3807 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000);
3808 I915_WRITE(GEN6_RC6p_THRESHOLD
, 150000);
3809 I915_WRITE(GEN6_RC6pp_THRESHOLD
, 64000); /* unused */
3811 /* Check if we are enabling RC6 */
3812 rc6_mode
= intel_enable_rc6(dev_priv
->dev
);
3813 if (rc6_mode
& INTEL_RC6_ENABLE
)
3814 rc6_mask
|= GEN6_RC_CTL_RC6_ENABLE
;
3816 /* We don't use those on Haswell */
3817 if (!IS_HASWELL(dev
)) {
3818 if (rc6_mode
& INTEL_RC6p_ENABLE
)
3819 rc6_mask
|= GEN6_RC_CTL_RC6p_ENABLE
;
3821 if (rc6_mode
& INTEL_RC6pp_ENABLE
)
3822 rc6_mask
|= GEN6_RC_CTL_RC6pp_ENABLE
;
3825 intel_print_rc6_info(dev
, rc6_mask
);
3827 I915_WRITE(GEN6_RC_CONTROL
,
3829 GEN6_RC_CTL_EI_MODE(1) |
3830 GEN6_RC_CTL_HW_ENABLE
);
3832 /* Power down if completely idle for over 50ms */
3833 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 50000);
3834 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
3836 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_MIN_FREQ_TABLE
, 0);
3839 ret
= sandybridge_pcode_read(dev_priv
, GEN6_READ_OC_PARAMS
, &pcu_mbox
);
3840 if (!ret
&& (pcu_mbox
& (1<<31))) { /* OC supported */
3841 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3842 (dev_priv
->rps
.max_delay
& 0xff) * 50,
3843 (pcu_mbox
& 0xff) * 50);
3844 dev_priv
->rps
.hw_max
= pcu_mbox
& 0xff;
3847 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3850 dev_priv
->rps
.power
= HIGH_POWER
; /* force a reset */
3851 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3853 gen6_enable_rps_interrupts(dev
);
3856 ret
= sandybridge_pcode_read(dev_priv
, GEN6_PCODE_READ_RC6VIDS
, &rc6vids
);
3857 if (IS_GEN6(dev
) && ret
) {
3858 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3859 } else if (IS_GEN6(dev
) && (GEN6_DECODE_RC6_VID(rc6vids
& 0xff) < 450)) {
3860 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3861 GEN6_DECODE_RC6_VID(rc6vids
& 0xff), 450);
3862 rc6vids
&= 0xffff00;
3863 rc6vids
|= GEN6_ENCODE_RC6_VID(450);
3864 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_RC6VIDS
, rc6vids
);
3866 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3869 gen6_gt_force_wake_put(dev_priv
);
3872 void gen6_update_ring_freq(struct drm_device
*dev
)
3874 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3876 unsigned int gpu_freq
;
3877 unsigned int max_ia_freq
, min_ring_freq
;
3878 int scaling_factor
= 180;
3879 struct cpufreq_policy
*policy
;
3881 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3883 policy
= cpufreq_cpu_get(0);
3885 max_ia_freq
= policy
->cpuinfo
.max_freq
;
3886 cpufreq_cpu_put(policy
);
3889 * Default to measured freq if none found, PCU will ensure we
3892 max_ia_freq
= tsc_khz
;
3895 /* Convert from kHz to MHz */
3896 max_ia_freq
/= 1000;
3898 min_ring_freq
= I915_READ(DCLK
) & 0xf;
3899 /* convert DDR frequency from units of 266.6MHz to bandwidth */
3900 min_ring_freq
= mult_frac(min_ring_freq
, 8, 3);
3903 * For each potential GPU frequency, load a ring frequency we'd like
3904 * to use for memory access. We do this by specifying the IA frequency
3905 * the PCU should use as a reference to determine the ring frequency.
3907 for (gpu_freq
= dev_priv
->rps
.max_delay
; gpu_freq
>= dev_priv
->rps
.min_delay
;
3909 int diff
= dev_priv
->rps
.max_delay
- gpu_freq
;
3910 unsigned int ia_freq
= 0, ring_freq
= 0;
3912 if (IS_HASWELL(dev
)) {
3913 ring_freq
= mult_frac(gpu_freq
, 5, 4);
3914 ring_freq
= max(min_ring_freq
, ring_freq
);
3915 /* leave ia_freq as the default, chosen by cpufreq */
3917 /* On older processors, there is no separate ring
3918 * clock domain, so in order to boost the bandwidth
3919 * of the ring, we need to upclock the CPU (ia_freq).
3921 * For GPU frequencies less than 750MHz,
3922 * just use the lowest ring freq.
3924 if (gpu_freq
< min_freq
)
3927 ia_freq
= max_ia_freq
- ((diff
* scaling_factor
) / 2);
3928 ia_freq
= DIV_ROUND_CLOSEST(ia_freq
, 100);
3931 sandybridge_pcode_write(dev_priv
,
3932 GEN6_PCODE_WRITE_MIN_FREQ_TABLE
,
3933 ia_freq
<< GEN6_PCODE_FREQ_IA_RATIO_SHIFT
|
3934 ring_freq
<< GEN6_PCODE_FREQ_RING_RATIO_SHIFT
|
3939 int valleyview_rps_max_freq(struct drm_i915_private
*dev_priv
)
3943 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FREQ_FUSE
);
3945 rp0
= (val
& FB_GFX_MAX_FREQ_FUSE_MASK
) >> FB_GFX_MAX_FREQ_FUSE_SHIFT
;
3947 rp0
= min_t(u32
, rp0
, 0xea);
3952 static int valleyview_rps_rpe_freq(struct drm_i915_private
*dev_priv
)
3956 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_LO
);
3957 rpe
= (val
& FB_FMAX_VMIN_FREQ_LO_MASK
) >> FB_FMAX_VMIN_FREQ_LO_SHIFT
;
3958 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_HI
);
3959 rpe
|= (val
& FB_FMAX_VMIN_FREQ_HI_MASK
) << 5;
3964 int valleyview_rps_min_freq(struct drm_i915_private
*dev_priv
)
3966 return vlv_punit_read(dev_priv
, PUNIT_REG_GPU_LFM
) & 0xff;
3969 static void valleyview_setup_pctx(struct drm_device
*dev
)
3971 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3972 struct drm_i915_gem_object
*pctx
;
3973 unsigned long pctx_paddr
;
3975 int pctx_size
= 24*1024;
3977 pcbr
= I915_READ(VLV_PCBR
);
3979 /* BIOS set it up already, grab the pre-alloc'd space */
3982 pcbr_offset
= (pcbr
& (~4095)) - dev_priv
->mm
.stolen_base
;
3983 pctx
= i915_gem_object_create_stolen_for_preallocated(dev_priv
->dev
,
3985 I915_GTT_OFFSET_NONE
,
3991 * From the Gunit register HAS:
3992 * The Gfx driver is expected to program this register and ensure
3993 * proper allocation within Gfx stolen memory. For example, this
3994 * register should be programmed such than the PCBR range does not
3995 * overlap with other ranges, such as the frame buffer, protected
3996 * memory, or any other relevant ranges.
3998 pctx
= i915_gem_object_create_stolen(dev
, pctx_size
);
4000 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
4004 pctx_paddr
= dev_priv
->mm
.stolen_base
+ pctx
->stolen
->start
;
4005 I915_WRITE(VLV_PCBR
, pctx_paddr
);
4008 dev_priv
->vlv_pctx
= pctx
;
4011 static void valleyview_enable_rps(struct drm_device
*dev
)
4013 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4014 struct intel_ring_buffer
*ring
;
4015 u32 gtfifodbg
, val
, rc6_mode
= 0;
4018 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
4020 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
4021 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
4023 I915_WRITE(GTFIFODBG
, gtfifodbg
);
4026 valleyview_setup_pctx(dev
);
4028 gen6_gt_force_wake_get(dev_priv
);
4030 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 59400);
4031 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 245000);
4032 I915_WRITE(GEN6_RP_UP_EI
, 66000);
4033 I915_WRITE(GEN6_RP_DOWN_EI
, 350000);
4035 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
4037 I915_WRITE(GEN6_RP_CONTROL
,
4038 GEN6_RP_MEDIA_TURBO
|
4039 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
4040 GEN6_RP_MEDIA_IS_GFX
|
4042 GEN6_RP_UP_BUSY_AVG
|
4043 GEN6_RP_DOWN_IDLE_CONT
);
4045 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 0x00280000);
4046 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
4047 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
4049 for_each_ring(ring
, dev_priv
, i
)
4050 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
4052 I915_WRITE(GEN6_RC6_THRESHOLD
, 0xc350);
4054 /* allows RC6 residency counter to work */
4055 I915_WRITE(VLV_COUNTER_CONTROL
,
4056 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH
|
4057 VLV_MEDIA_RC6_COUNT_EN
|
4058 VLV_RENDER_RC6_COUNT_EN
));
4059 if (intel_enable_rc6(dev
) & INTEL_RC6_ENABLE
)
4060 rc6_mode
= GEN7_RC_CTL_TO_MODE
;
4062 intel_print_rc6_info(dev
, rc6_mode
);
4064 I915_WRITE(GEN6_RC_CONTROL
, rc6_mode
);
4066 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
4067 switch ((val
>> 6) & 3) {
4070 dev_priv
->mem_freq
= 800;
4073 dev_priv
->mem_freq
= 1066;
4076 dev_priv
->mem_freq
= 1333;
4079 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv
->mem_freq
);
4081 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val
& 0x10 ? "yes" : "no");
4082 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val
);
4084 dev_priv
->rps
.cur_delay
= (val
>> 8) & 0xff;
4085 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
4086 vlv_gpu_freq(dev_priv
->mem_freq
,
4087 dev_priv
->rps
.cur_delay
),
4088 dev_priv
->rps
.cur_delay
);
4090 dev_priv
->rps
.max_delay
= valleyview_rps_max_freq(dev_priv
);
4091 dev_priv
->rps
.hw_max
= dev_priv
->rps
.max_delay
;
4092 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
4093 vlv_gpu_freq(dev_priv
->mem_freq
,
4094 dev_priv
->rps
.max_delay
),
4095 dev_priv
->rps
.max_delay
);
4097 dev_priv
->rps
.rpe_delay
= valleyview_rps_rpe_freq(dev_priv
);
4098 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
4099 vlv_gpu_freq(dev_priv
->mem_freq
,
4100 dev_priv
->rps
.rpe_delay
),
4101 dev_priv
->rps
.rpe_delay
);
4103 dev_priv
->rps
.min_delay
= valleyview_rps_min_freq(dev_priv
);
4104 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
4105 vlv_gpu_freq(dev_priv
->mem_freq
,
4106 dev_priv
->rps
.min_delay
),
4107 dev_priv
->rps
.min_delay
);
4109 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
4110 vlv_gpu_freq(dev_priv
->mem_freq
,
4111 dev_priv
->rps
.rpe_delay
),
4112 dev_priv
->rps
.rpe_delay
);
4114 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.rpe_delay
);
4116 gen6_enable_rps_interrupts(dev
);
4118 gen6_gt_force_wake_put(dev_priv
);
4121 void ironlake_teardown_rc6(struct drm_device
*dev
)
4123 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4125 if (dev_priv
->ips
.renderctx
) {
4126 i915_gem_object_unpin(dev_priv
->ips
.renderctx
);
4127 drm_gem_object_unreference(&dev_priv
->ips
.renderctx
->base
);
4128 dev_priv
->ips
.renderctx
= NULL
;
4131 if (dev_priv
->ips
.pwrctx
) {
4132 i915_gem_object_unpin(dev_priv
->ips
.pwrctx
);
4133 drm_gem_object_unreference(&dev_priv
->ips
.pwrctx
->base
);
4134 dev_priv
->ips
.pwrctx
= NULL
;
4138 static void ironlake_disable_rc6(struct drm_device
*dev
)
4140 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4142 if (I915_READ(PWRCTXA
)) {
4143 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
4144 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) | RCX_SW_EXIT
);
4145 wait_for(((I915_READ(RSTDBYCTL
) & RSX_STATUS_MASK
) == RSX_STATUS_ON
),
4148 I915_WRITE(PWRCTXA
, 0);
4149 POSTING_READ(PWRCTXA
);
4151 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
4152 POSTING_READ(RSTDBYCTL
);
4156 static int ironlake_setup_rc6(struct drm_device
*dev
)
4158 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4160 if (dev_priv
->ips
.renderctx
== NULL
)
4161 dev_priv
->ips
.renderctx
= intel_alloc_context_page(dev
);
4162 if (!dev_priv
->ips
.renderctx
)
4165 if (dev_priv
->ips
.pwrctx
== NULL
)
4166 dev_priv
->ips
.pwrctx
= intel_alloc_context_page(dev
);
4167 if (!dev_priv
->ips
.pwrctx
) {
4168 ironlake_teardown_rc6(dev
);
4175 static void ironlake_enable_rc6(struct drm_device
*dev
)
4177 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4178 struct intel_ring_buffer
*ring
= &dev_priv
->ring
[RCS
];
4179 bool was_interruptible
;
4182 /* rc6 disabled by default due to repeated reports of hanging during
4185 if (!intel_enable_rc6(dev
))
4188 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
4190 ret
= ironlake_setup_rc6(dev
);
4194 was_interruptible
= dev_priv
->mm
.interruptible
;
4195 dev_priv
->mm
.interruptible
= false;
4198 * GPU can automatically power down the render unit if given a page
4201 ret
= intel_ring_begin(ring
, 6);
4203 ironlake_teardown_rc6(dev
);
4204 dev_priv
->mm
.interruptible
= was_interruptible
;
4208 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
| MI_SUSPEND_FLUSH_EN
);
4209 intel_ring_emit(ring
, MI_SET_CONTEXT
);
4210 intel_ring_emit(ring
, i915_gem_obj_ggtt_offset(dev_priv
->ips
.renderctx
) |
4212 MI_SAVE_EXT_STATE_EN
|
4213 MI_RESTORE_EXT_STATE_EN
|
4214 MI_RESTORE_INHIBIT
);
4215 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
);
4216 intel_ring_emit(ring
, MI_NOOP
);
4217 intel_ring_emit(ring
, MI_FLUSH
);
4218 intel_ring_advance(ring
);
4221 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
4222 * does an implicit flush, combined with MI_FLUSH above, it should be
4223 * safe to assume that renderctx is valid
4225 ret
= intel_ring_idle(ring
);
4226 dev_priv
->mm
.interruptible
= was_interruptible
;
4228 DRM_ERROR("failed to enable ironlake power savings\n");
4229 ironlake_teardown_rc6(dev
);
4233 I915_WRITE(PWRCTXA
, i915_gem_obj_ggtt_offset(dev_priv
->ips
.pwrctx
) | PWRCTX_EN
);
4234 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
4236 intel_print_rc6_info(dev
, INTEL_RC6_ENABLE
);
4239 static unsigned long intel_pxfreq(u32 vidfreq
)
4242 int div
= (vidfreq
& 0x3f0000) >> 16;
4243 int post
= (vidfreq
& 0x3000) >> 12;
4244 int pre
= (vidfreq
& 0x7);
4249 freq
= ((div
* 133333) / ((1<<post
) * pre
));
4254 static const struct cparams
{
4260 { 1, 1333, 301, 28664 },
4261 { 1, 1066, 294, 24460 },
4262 { 1, 800, 294, 25192 },
4263 { 0, 1333, 276, 27605 },
4264 { 0, 1066, 276, 27605 },
4265 { 0, 800, 231, 23784 },
4268 static unsigned long __i915_chipset_val(struct drm_i915_private
*dev_priv
)
4270 u64 total_count
, diff
, ret
;
4271 u32 count1
, count2
, count3
, m
= 0, c
= 0;
4272 unsigned long now
= jiffies_to_msecs(jiffies
), diff1
;
4275 assert_spin_locked(&mchdev_lock
);
4277 diff1
= now
- dev_priv
->ips
.last_time1
;
4279 /* Prevent division-by-zero if we are asking too fast.
4280 * Also, we don't get interesting results if we are polling
4281 * faster than once in 10ms, so just return the saved value
4285 return dev_priv
->ips
.chipset_power
;
4287 count1
= I915_READ(DMIEC
);
4288 count2
= I915_READ(DDREC
);
4289 count3
= I915_READ(CSIEC
);
4291 total_count
= count1
+ count2
+ count3
;
4293 /* FIXME: handle per-counter overflow */
4294 if (total_count
< dev_priv
->ips
.last_count1
) {
4295 diff
= ~0UL - dev_priv
->ips
.last_count1
;
4296 diff
+= total_count
;
4298 diff
= total_count
- dev_priv
->ips
.last_count1
;
4301 for (i
= 0; i
< ARRAY_SIZE(cparams
); i
++) {
4302 if (cparams
[i
].i
== dev_priv
->ips
.c_m
&&
4303 cparams
[i
].t
== dev_priv
->ips
.r_t
) {
4310 diff
= div_u64(diff
, diff1
);
4311 ret
= ((m
* diff
) + c
);
4312 ret
= div_u64(ret
, 10);
4314 dev_priv
->ips
.last_count1
= total_count
;
4315 dev_priv
->ips
.last_time1
= now
;
4317 dev_priv
->ips
.chipset_power
= ret
;
4322 unsigned long i915_chipset_val(struct drm_i915_private
*dev_priv
)
4326 if (dev_priv
->info
->gen
!= 5)
4329 spin_lock_irq(&mchdev_lock
);
4331 val
= __i915_chipset_val(dev_priv
);
4333 spin_unlock_irq(&mchdev_lock
);
4338 unsigned long i915_mch_val(struct drm_i915_private
*dev_priv
)
4340 unsigned long m
, x
, b
;
4343 tsfs
= I915_READ(TSFS
);
4345 m
= ((tsfs
& TSFS_SLOPE_MASK
) >> TSFS_SLOPE_SHIFT
);
4346 x
= I915_READ8(TR1
);
4348 b
= tsfs
& TSFS_INTR_MASK
;
4350 return ((m
* x
) / 127) - b
;
4353 static u16
pvid_to_extvid(struct drm_i915_private
*dev_priv
, u8 pxvid
)
4355 static const struct v_table
{
4356 u16 vd
; /* in .1 mil */
4357 u16 vm
; /* in .1 mil */
4488 if (dev_priv
->info
->is_mobile
)
4489 return v_table
[pxvid
].vm
;
4491 return v_table
[pxvid
].vd
;
4494 static void __i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
4496 struct timespec now
, diff1
;
4498 unsigned long diffms
;
4501 assert_spin_locked(&mchdev_lock
);
4503 getrawmonotonic(&now
);
4504 diff1
= timespec_sub(now
, dev_priv
->ips
.last_time2
);
4506 /* Don't divide by 0 */
4507 diffms
= diff1
.tv_sec
* 1000 + diff1
.tv_nsec
/ 1000000;
4511 count
= I915_READ(GFXEC
);
4513 if (count
< dev_priv
->ips
.last_count2
) {
4514 diff
= ~0UL - dev_priv
->ips
.last_count2
;
4517 diff
= count
- dev_priv
->ips
.last_count2
;
4520 dev_priv
->ips
.last_count2
= count
;
4521 dev_priv
->ips
.last_time2
= now
;
4523 /* More magic constants... */
4525 diff
= div_u64(diff
, diffms
* 10);
4526 dev_priv
->ips
.gfx_power
= diff
;
4529 void i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
4531 if (dev_priv
->info
->gen
!= 5)
4534 spin_lock_irq(&mchdev_lock
);
4536 __i915_update_gfx_val(dev_priv
);
4538 spin_unlock_irq(&mchdev_lock
);
4541 static unsigned long __i915_gfx_val(struct drm_i915_private
*dev_priv
)
4543 unsigned long t
, corr
, state1
, corr2
, state2
;
4546 assert_spin_locked(&mchdev_lock
);
4548 pxvid
= I915_READ(PXVFREQ_BASE
+ (dev_priv
->rps
.cur_delay
* 4));
4549 pxvid
= (pxvid
>> 24) & 0x7f;
4550 ext_v
= pvid_to_extvid(dev_priv
, pxvid
);
4554 t
= i915_mch_val(dev_priv
);
4556 /* Revel in the empirically derived constants */
4558 /* Correction factor in 1/100000 units */
4560 corr
= ((t
* 2349) + 135940);
4562 corr
= ((t
* 964) + 29317);
4564 corr
= ((t
* 301) + 1004);
4566 corr
= corr
* ((150142 * state1
) / 10000 - 78642);
4568 corr2
= (corr
* dev_priv
->ips
.corr
);
4570 state2
= (corr2
* state1
) / 10000;
4571 state2
/= 100; /* convert to mW */
4573 __i915_update_gfx_val(dev_priv
);
4575 return dev_priv
->ips
.gfx_power
+ state2
;
4578 unsigned long i915_gfx_val(struct drm_i915_private
*dev_priv
)
4582 if (dev_priv
->info
->gen
!= 5)
4585 spin_lock_irq(&mchdev_lock
);
4587 val
= __i915_gfx_val(dev_priv
);
4589 spin_unlock_irq(&mchdev_lock
);
4595 * i915_read_mch_val - return value for IPS use
4597 * Calculate and return a value for the IPS driver to use when deciding whether
4598 * we have thermal and power headroom to increase CPU or GPU power budget.
4600 unsigned long i915_read_mch_val(void)
4602 struct drm_i915_private
*dev_priv
;
4603 unsigned long chipset_val
, graphics_val
, ret
= 0;
4605 spin_lock_irq(&mchdev_lock
);
4608 dev_priv
= i915_mch_dev
;
4610 chipset_val
= __i915_chipset_val(dev_priv
);
4611 graphics_val
= __i915_gfx_val(dev_priv
);
4613 ret
= chipset_val
+ graphics_val
;
4616 spin_unlock_irq(&mchdev_lock
);
4620 EXPORT_SYMBOL_GPL(i915_read_mch_val
);
4623 * i915_gpu_raise - raise GPU frequency limit
4625 * Raise the limit; IPS indicates we have thermal headroom.
4627 bool i915_gpu_raise(void)
4629 struct drm_i915_private
*dev_priv
;
4632 spin_lock_irq(&mchdev_lock
);
4633 if (!i915_mch_dev
) {
4637 dev_priv
= i915_mch_dev
;
4639 if (dev_priv
->ips
.max_delay
> dev_priv
->ips
.fmax
)
4640 dev_priv
->ips
.max_delay
--;
4643 spin_unlock_irq(&mchdev_lock
);
4647 EXPORT_SYMBOL_GPL(i915_gpu_raise
);
4650 * i915_gpu_lower - lower GPU frequency limit
4652 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4653 * frequency maximum.
4655 bool i915_gpu_lower(void)
4657 struct drm_i915_private
*dev_priv
;
4660 spin_lock_irq(&mchdev_lock
);
4661 if (!i915_mch_dev
) {
4665 dev_priv
= i915_mch_dev
;
4667 if (dev_priv
->ips
.max_delay
< dev_priv
->ips
.min_delay
)
4668 dev_priv
->ips
.max_delay
++;
4671 spin_unlock_irq(&mchdev_lock
);
4675 EXPORT_SYMBOL_GPL(i915_gpu_lower
);
4678 * i915_gpu_busy - indicate GPU business to IPS
4680 * Tell the IPS driver whether or not the GPU is busy.
4682 bool i915_gpu_busy(void)
4684 struct drm_i915_private
*dev_priv
;
4685 struct intel_ring_buffer
*ring
;
4689 spin_lock_irq(&mchdev_lock
);
4692 dev_priv
= i915_mch_dev
;
4694 for_each_ring(ring
, dev_priv
, i
)
4695 ret
|= !list_empty(&ring
->request_list
);
4698 spin_unlock_irq(&mchdev_lock
);
4702 EXPORT_SYMBOL_GPL(i915_gpu_busy
);
4705 * i915_gpu_turbo_disable - disable graphics turbo
4707 * Disable graphics turbo by resetting the max frequency and setting the
4708 * current frequency to the default.
4710 bool i915_gpu_turbo_disable(void)
4712 struct drm_i915_private
*dev_priv
;
4715 spin_lock_irq(&mchdev_lock
);
4716 if (!i915_mch_dev
) {
4720 dev_priv
= i915_mch_dev
;
4722 dev_priv
->ips
.max_delay
= dev_priv
->ips
.fstart
;
4724 if (!ironlake_set_drps(dev_priv
->dev
, dev_priv
->ips
.fstart
))
4728 spin_unlock_irq(&mchdev_lock
);
4732 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable
);
4735 * Tells the intel_ips driver that the i915 driver is now loaded, if
4736 * IPS got loaded first.
4738 * This awkward dance is so that neither module has to depend on the
4739 * other in order for IPS to do the appropriate communication of
4740 * GPU turbo limits to i915.
4743 ips_ping_for_i915_load(void)
4747 link
= symbol_get(ips_link_to_i915_driver
);
4750 symbol_put(ips_link_to_i915_driver
);
4754 void intel_gpu_ips_init(struct drm_i915_private
*dev_priv
)
4756 /* We only register the i915 ips part with intel-ips once everything is
4757 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4758 spin_lock_irq(&mchdev_lock
);
4759 i915_mch_dev
= dev_priv
;
4760 spin_unlock_irq(&mchdev_lock
);
4762 ips_ping_for_i915_load();
4765 void intel_gpu_ips_teardown(void)
4767 spin_lock_irq(&mchdev_lock
);
4768 i915_mch_dev
= NULL
;
4769 spin_unlock_irq(&mchdev_lock
);
4771 static void intel_init_emon(struct drm_device
*dev
)
4773 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4778 /* Disable to program */
4782 /* Program energy weights for various events */
4783 I915_WRITE(SDEW
, 0x15040d00);
4784 I915_WRITE(CSIEW0
, 0x007f0000);
4785 I915_WRITE(CSIEW1
, 0x1e220004);
4786 I915_WRITE(CSIEW2
, 0x04000004);
4788 for (i
= 0; i
< 5; i
++)
4789 I915_WRITE(PEW
+ (i
* 4), 0);
4790 for (i
= 0; i
< 3; i
++)
4791 I915_WRITE(DEW
+ (i
* 4), 0);
4793 /* Program P-state weights to account for frequency power adjustment */
4794 for (i
= 0; i
< 16; i
++) {
4795 u32 pxvidfreq
= I915_READ(PXVFREQ_BASE
+ (i
* 4));
4796 unsigned long freq
= intel_pxfreq(pxvidfreq
);
4797 unsigned long vid
= (pxvidfreq
& PXVFREQ_PX_MASK
) >>
4802 val
*= (freq
/ 1000);
4804 val
/= (127*127*900);
4806 DRM_ERROR("bad pxval: %ld\n", val
);
4809 /* Render standby states get 0 weight */
4813 for (i
= 0; i
< 4; i
++) {
4814 u32 val
= (pxw
[i
*4] << 24) | (pxw
[(i
*4)+1] << 16) |
4815 (pxw
[(i
*4)+2] << 8) | (pxw
[(i
*4)+3]);
4816 I915_WRITE(PXW
+ (i
* 4), val
);
4819 /* Adjust magic regs to magic values (more experimental results) */
4820 I915_WRITE(OGW0
, 0);
4821 I915_WRITE(OGW1
, 0);
4822 I915_WRITE(EG0
, 0x00007f00);
4823 I915_WRITE(EG1
, 0x0000000e);
4824 I915_WRITE(EG2
, 0x000e0000);
4825 I915_WRITE(EG3
, 0x68000300);
4826 I915_WRITE(EG4
, 0x42000000);
4827 I915_WRITE(EG5
, 0x00140031);
4831 for (i
= 0; i
< 8; i
++)
4832 I915_WRITE(PXWL
+ (i
* 4), 0);
4834 /* Enable PMON + select events */
4835 I915_WRITE(ECR
, 0x80000019);
4837 lcfuse
= I915_READ(LCFUSE02
);
4839 dev_priv
->ips
.corr
= (lcfuse
& LCFUSE_HIV_MASK
);
4842 void intel_disable_gt_powersave(struct drm_device
*dev
)
4844 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4846 /* Interrupts should be disabled already to avoid re-arming. */
4847 WARN_ON(dev
->irq_enabled
);
4849 if (IS_IRONLAKE_M(dev
)) {
4850 ironlake_disable_drps(dev
);
4851 ironlake_disable_rc6(dev
);
4852 } else if (INTEL_INFO(dev
)->gen
>= 6) {
4853 cancel_delayed_work_sync(&dev_priv
->rps
.delayed_resume_work
);
4854 cancel_work_sync(&dev_priv
->rps
.work
);
4855 mutex_lock(&dev_priv
->rps
.hw_lock
);
4856 if (IS_VALLEYVIEW(dev
))
4857 valleyview_disable_rps(dev
);
4859 gen6_disable_rps(dev
);
4860 dev_priv
->rps
.enabled
= false;
4861 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4865 static void intel_gen6_powersave_work(struct work_struct
*work
)
4867 struct drm_i915_private
*dev_priv
=
4868 container_of(work
, struct drm_i915_private
,
4869 rps
.delayed_resume_work
.work
);
4870 struct drm_device
*dev
= dev_priv
->dev
;
4872 mutex_lock(&dev_priv
->rps
.hw_lock
);
4874 if (IS_VALLEYVIEW(dev
)) {
4875 valleyview_enable_rps(dev
);
4877 gen6_enable_rps(dev
);
4878 gen6_update_ring_freq(dev
);
4880 dev_priv
->rps
.enabled
= true;
4881 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4884 void intel_enable_gt_powersave(struct drm_device
*dev
)
4886 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4888 if (IS_IRONLAKE_M(dev
)) {
4889 ironlake_enable_drps(dev
);
4890 ironlake_enable_rc6(dev
);
4891 intel_init_emon(dev
);
4892 } else if (IS_GEN6(dev
) || IS_GEN7(dev
)) {
4894 * PCU communication is slow and this doesn't need to be
4895 * done at any specific time, so do this out of our fast path
4896 * to make resume and init faster.
4898 schedule_delayed_work(&dev_priv
->rps
.delayed_resume_work
,
4899 round_jiffies_up_relative(HZ
));
4903 static void ibx_init_clock_gating(struct drm_device
*dev
)
4905 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4908 * On Ibex Peak and Cougar Point, we need to disable clock
4909 * gating for the panel power sequencer or it will fail to
4910 * start up when no ports are active.
4912 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
4915 static void g4x_disable_trickle_feed(struct drm_device
*dev
)
4917 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4920 for_each_pipe(pipe
) {
4921 I915_WRITE(DSPCNTR(pipe
),
4922 I915_READ(DSPCNTR(pipe
)) |
4923 DISPPLANE_TRICKLE_FEED_DISABLE
);
4924 intel_flush_primary_plane(dev_priv
, pipe
);
4928 static void ironlake_init_clock_gating(struct drm_device
*dev
)
4930 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4931 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
4935 * WaFbcDisableDpfcClockGating:ilk
4937 dspclk_gate
|= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE
|
4938 ILK_DPFCUNIT_CLOCK_GATE_DISABLE
|
4939 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
;
4941 I915_WRITE(PCH_3DCGDIS0
,
4942 MARIUNIT_CLOCK_GATE_DISABLE
|
4943 SVSMUNIT_CLOCK_GATE_DISABLE
);
4944 I915_WRITE(PCH_3DCGDIS1
,
4945 VFMUNIT_CLOCK_GATE_DISABLE
);
4948 * According to the spec the following bits should be set in
4949 * order to enable memory self-refresh
4950 * The bit 22/21 of 0x42004
4951 * The bit 5 of 0x42020
4952 * The bit 15 of 0x45000
4954 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4955 (I915_READ(ILK_DISPLAY_CHICKEN2
) |
4956 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
));
4957 dspclk_gate
|= ILK_DPARBUNIT_CLOCK_GATE_ENABLE
;
4958 I915_WRITE(DISP_ARB_CTL
,
4959 (I915_READ(DISP_ARB_CTL
) |
4961 I915_WRITE(WM3_LP_ILK
, 0);
4962 I915_WRITE(WM2_LP_ILK
, 0);
4963 I915_WRITE(WM1_LP_ILK
, 0);
4966 * Based on the document from hardware guys the following bits
4967 * should be set unconditionally in order to enable FBC.
4968 * The bit 22 of 0x42000
4969 * The bit 22 of 0x42004
4970 * The bit 7,8,9 of 0x42020.
4972 if (IS_IRONLAKE_M(dev
)) {
4973 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
4974 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
4975 I915_READ(ILK_DISPLAY_CHICKEN1
) |
4977 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4978 I915_READ(ILK_DISPLAY_CHICKEN2
) |
4982 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
4984 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
4985 I915_READ(ILK_DISPLAY_CHICKEN2
) |
4986 ILK_ELPIN_409_SELECT
);
4987 I915_WRITE(_3D_CHICKEN2
,
4988 _3D_CHICKEN2_WM_READ_PIPELINED
<< 16 |
4989 _3D_CHICKEN2_WM_READ_PIPELINED
);
4991 /* WaDisableRenderCachePipelinedFlush:ilk */
4992 I915_WRITE(CACHE_MODE_0
,
4993 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
4995 g4x_disable_trickle_feed(dev
);
4997 ibx_init_clock_gating(dev
);
5000 static void cpt_init_clock_gating(struct drm_device
*dev
)
5002 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5007 * On Ibex Peak and Cougar Point, we need to disable clock
5008 * gating for the panel power sequencer or it will fail to
5009 * start up when no ports are active.
5011 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
|
5012 PCH_DPLUNIT_CLOCK_GATE_DISABLE
|
5013 PCH_CPUNIT_CLOCK_GATE_DISABLE
);
5014 I915_WRITE(SOUTH_CHICKEN2
, I915_READ(SOUTH_CHICKEN2
) |
5015 DPLS_EDP_PPS_FIX_DIS
);
5016 /* The below fixes the weird display corruption, a few pixels shifted
5017 * downward, on (only) LVDS of some HP laptops with IVY.
5019 for_each_pipe(pipe
) {
5020 val
= I915_READ(TRANS_CHICKEN2(pipe
));
5021 val
|= TRANS_CHICKEN2_TIMING_OVERRIDE
;
5022 val
&= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
5023 if (dev_priv
->vbt
.fdi_rx_polarity_inverted
)
5024 val
|= TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
5025 val
&= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK
;
5026 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER
;
5027 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH
;
5028 I915_WRITE(TRANS_CHICKEN2(pipe
), val
);
5030 /* WADP0ClockGatingDisable */
5031 for_each_pipe(pipe
) {
5032 I915_WRITE(TRANS_CHICKEN1(pipe
),
5033 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
5037 static void gen6_check_mch_setup(struct drm_device
*dev
)
5039 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5042 tmp
= I915_READ(MCH_SSKPD
);
5043 if ((tmp
& MCH_SSKPD_WM0_MASK
) != MCH_SSKPD_WM0_VAL
) {
5044 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp
);
5045 DRM_INFO("This can cause pipe underruns and display issues.\n");
5046 DRM_INFO("Please upgrade your BIOS to fix this.\n");
5050 static void gen6_init_clock_gating(struct drm_device
*dev
)
5052 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5053 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
5055 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
5057 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5058 I915_READ(ILK_DISPLAY_CHICKEN2
) |
5059 ILK_ELPIN_409_SELECT
);
5061 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
5062 I915_WRITE(_3D_CHICKEN
,
5063 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB
));
5065 /* WaSetupGtModeTdRowDispatch:snb */
5066 if (IS_SNB_GT1(dev
))
5067 I915_WRITE(GEN6_GT_MODE
,
5068 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE
));
5070 I915_WRITE(WM3_LP_ILK
, 0);
5071 I915_WRITE(WM2_LP_ILK
, 0);
5072 I915_WRITE(WM1_LP_ILK
, 0);
5074 I915_WRITE(CACHE_MODE_0
,
5075 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB
));
5077 I915_WRITE(GEN6_UCGCTL1
,
5078 I915_READ(GEN6_UCGCTL1
) |
5079 GEN6_BLBUNIT_CLOCK_GATE_DISABLE
|
5080 GEN6_CSUNIT_CLOCK_GATE_DISABLE
);
5082 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5083 * gating disable must be set. Failure to set it results in
5084 * flickering pixels due to Z write ordering failures after
5085 * some amount of runtime in the Mesa "fire" demo, and Unigine
5086 * Sanctuary and Tropics, and apparently anything else with
5087 * alpha test or pixel discard.
5089 * According to the spec, bit 11 (RCCUNIT) must also be set,
5090 * but we didn't debug actual testcases to find it out.
5092 * Also apply WaDisableVDSUnitClockGating:snb and
5093 * WaDisableRCPBUnitClockGating:snb.
5095 I915_WRITE(GEN6_UCGCTL2
,
5096 GEN7_VDSUNIT_CLOCK_GATE_DISABLE
|
5097 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
5098 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5100 /* Bspec says we need to always set all mask bits. */
5101 I915_WRITE(_3D_CHICKEN3
, (0xFFFF << 16) |
5102 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL
);
5105 * According to the spec the following bits should be
5106 * set in order to enable memory self-refresh and fbc:
5107 * The bit21 and bit22 of 0x42000
5108 * The bit21 and bit22 of 0x42004
5109 * The bit5 and bit7 of 0x42020
5110 * The bit14 of 0x70180
5111 * The bit14 of 0x71180
5113 * WaFbcAsynchFlipDisableFbcQueue:snb
5115 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
5116 I915_READ(ILK_DISPLAY_CHICKEN1
) |
5117 ILK_FBCQ_DIS
| ILK_PABSTRETCH_DIS
);
5118 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5119 I915_READ(ILK_DISPLAY_CHICKEN2
) |
5120 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
);
5121 I915_WRITE(ILK_DSPCLK_GATE_D
,
5122 I915_READ(ILK_DSPCLK_GATE_D
) |
5123 ILK_DPARBUNIT_CLOCK_GATE_ENABLE
|
5124 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
);
5126 g4x_disable_trickle_feed(dev
);
5128 /* The default value should be 0x200 according to docs, but the two
5129 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
5130 I915_WRITE(GEN6_GT_MODE
, _MASKED_BIT_DISABLE(0xffff));
5131 I915_WRITE(GEN6_GT_MODE
, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI
));
5133 cpt_init_clock_gating(dev
);
5135 gen6_check_mch_setup(dev
);
5138 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private
*dev_priv
)
5140 uint32_t reg
= I915_READ(GEN7_FF_THREAD_MODE
);
5142 reg
&= ~GEN7_FF_SCHED_MASK
;
5143 reg
|= GEN7_FF_TS_SCHED_HW
;
5144 reg
|= GEN7_FF_VS_SCHED_HW
;
5145 reg
|= GEN7_FF_DS_SCHED_HW
;
5147 if (IS_HASWELL(dev_priv
->dev
))
5148 reg
&= ~GEN7_FF_VS_REF_CNT_FFME
;
5150 I915_WRITE(GEN7_FF_THREAD_MODE
, reg
);
5153 static void lpt_init_clock_gating(struct drm_device
*dev
)
5155 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5158 * TODO: this bit should only be enabled when really needed, then
5159 * disabled when not needed anymore in order to save power.
5161 if (dev_priv
->pch_id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
)
5162 I915_WRITE(SOUTH_DSPCLK_GATE_D
,
5163 I915_READ(SOUTH_DSPCLK_GATE_D
) |
5164 PCH_LP_PARTITION_LEVEL_DISABLE
);
5166 /* WADPOClockGatingDisable:hsw */
5167 I915_WRITE(_TRANSA_CHICKEN1
,
5168 I915_READ(_TRANSA_CHICKEN1
) |
5169 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
5172 static void lpt_suspend_hw(struct drm_device
*dev
)
5174 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5176 if (dev_priv
->pch_id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
) {
5177 uint32_t val
= I915_READ(SOUTH_DSPCLK_GATE_D
);
5179 val
&= ~PCH_LP_PARTITION_LEVEL_DISABLE
;
5180 I915_WRITE(SOUTH_DSPCLK_GATE_D
, val
);
5184 static void gen8_init_clock_gating(struct drm_device
*dev
)
5186 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5188 I915_WRITE(WM3_LP_ILK
, 0);
5189 I915_WRITE(WM2_LP_ILK
, 0);
5190 I915_WRITE(WM1_LP_ILK
, 0);
5193 static void haswell_init_clock_gating(struct drm_device
*dev
)
5195 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5197 I915_WRITE(WM3_LP_ILK
, 0);
5198 I915_WRITE(WM2_LP_ILK
, 0);
5199 I915_WRITE(WM1_LP_ILK
, 0);
5201 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5202 * This implements the WaDisableRCZUnitClockGating:hsw workaround.
5204 I915_WRITE(GEN6_UCGCTL2
, GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
5206 /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */
5207 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5208 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5210 /* WaApplyL3ControlAndL3ChickenMode:hsw */
5211 I915_WRITE(GEN7_L3CNTLREG1
,
5212 GEN7_WA_FOR_GEN7_L3_CONTROL
);
5213 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
5214 GEN7_WA_L3_CHICKEN_MODE
);
5216 /* L3 caching of data atomics doesn't work -- disable it. */
5217 I915_WRITE(HSW_SCRATCH1
, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE
);
5218 I915_WRITE(HSW_ROW_CHICKEN3
,
5219 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE
));
5221 /* This is required by WaCatErrorRejectionIssue:hsw */
5222 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5223 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5224 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5226 /* WaVSRefCountFullforceMissDisable:hsw */
5227 gen7_setup_fixed_func_scheduler(dev_priv
);
5229 /* WaDisable4x2SubspanOptimization:hsw */
5230 I915_WRITE(CACHE_MODE_1
,
5231 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5233 /* WaSwitchSolVfFArbitrationPriority:hsw */
5234 I915_WRITE(GAM_ECOCHK
, I915_READ(GAM_ECOCHK
) | HSW_ECOCHK_ARB_PRIO_SOL
);
5236 /* WaRsPkgCStateDisplayPMReq:hsw */
5237 I915_WRITE(CHICKEN_PAR1_1
,
5238 I915_READ(CHICKEN_PAR1_1
) | FORCE_ARB_IDLE_PLANES
);
5240 lpt_init_clock_gating(dev
);
5243 static void ivybridge_init_clock_gating(struct drm_device
*dev
)
5245 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5248 I915_WRITE(WM3_LP_ILK
, 0);
5249 I915_WRITE(WM2_LP_ILK
, 0);
5250 I915_WRITE(WM1_LP_ILK
, 0);
5252 I915_WRITE(ILK_DSPCLK_GATE_D
, ILK_VRHUNIT_CLOCK_GATE_DISABLE
);
5254 /* WaDisableEarlyCull:ivb */
5255 I915_WRITE(_3D_CHICKEN3
,
5256 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
5258 /* WaDisableBackToBackFlipFix:ivb */
5259 I915_WRITE(IVB_CHICKEN3
,
5260 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
5261 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
5263 /* WaDisablePSDDualDispatchEnable:ivb */
5264 if (IS_IVB_GT1(dev
))
5265 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5266 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5268 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2
,
5269 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5271 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
5272 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5273 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5275 /* WaApplyL3ControlAndL3ChickenMode:ivb */
5276 I915_WRITE(GEN7_L3CNTLREG1
,
5277 GEN7_WA_FOR_GEN7_L3_CONTROL
);
5278 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
5279 GEN7_WA_L3_CHICKEN_MODE
);
5280 if (IS_IVB_GT1(dev
))
5281 I915_WRITE(GEN7_ROW_CHICKEN2
,
5282 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5284 I915_WRITE(GEN7_ROW_CHICKEN2_GT2
,
5285 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5288 /* WaForceL3Serialization:ivb */
5289 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
5290 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
5292 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5293 * gating disable must be set. Failure to set it results in
5294 * flickering pixels due to Z write ordering failures after
5295 * some amount of runtime in the Mesa "fire" demo, and Unigine
5296 * Sanctuary and Tropics, and apparently anything else with
5297 * alpha test or pixel discard.
5299 * According to the spec, bit 11 (RCCUNIT) must also be set,
5300 * but we didn't debug actual testcases to find it out.
5302 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5303 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
5305 I915_WRITE(GEN6_UCGCTL2
,
5306 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
|
5307 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5309 /* This is required by WaCatErrorRejectionIssue:ivb */
5310 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5311 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5312 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5314 g4x_disable_trickle_feed(dev
);
5316 /* WaVSRefCountFullforceMissDisable:ivb */
5317 gen7_setup_fixed_func_scheduler(dev_priv
);
5319 /* WaDisable4x2SubspanOptimization:ivb */
5320 I915_WRITE(CACHE_MODE_1
,
5321 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5323 snpcr
= I915_READ(GEN6_MBCUNIT_SNPCR
);
5324 snpcr
&= ~GEN6_MBC_SNPCR_MASK
;
5325 snpcr
|= GEN6_MBC_SNPCR_MED
;
5326 I915_WRITE(GEN6_MBCUNIT_SNPCR
, snpcr
);
5328 if (!HAS_PCH_NOP(dev
))
5329 cpt_init_clock_gating(dev
);
5331 gen6_check_mch_setup(dev
);
5334 static void valleyview_init_clock_gating(struct drm_device
*dev
)
5336 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5338 I915_WRITE(DSPCLK_GATE_D
, VRHUNIT_CLOCK_GATE_DISABLE
);
5340 /* WaDisableEarlyCull:vlv */
5341 I915_WRITE(_3D_CHICKEN3
,
5342 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
5344 /* WaDisableBackToBackFlipFix:vlv */
5345 I915_WRITE(IVB_CHICKEN3
,
5346 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
5347 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
5349 /* WaDisablePSDDualDispatchEnable:vlv */
5350 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5351 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP
|
5352 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5354 /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */
5355 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5356 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5358 /* WaApplyL3ControlAndL3ChickenMode:vlv */
5359 I915_WRITE(GEN7_L3CNTLREG1
, I915_READ(GEN7_L3CNTLREG1
) | GEN7_L3AGDIS
);
5360 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
, GEN7_WA_L3_CHICKEN_MODE
);
5362 /* WaForceL3Serialization:vlv */
5363 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
5364 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
5366 /* WaDisableDopClockGating:vlv */
5367 I915_WRITE(GEN7_ROW_CHICKEN2
,
5368 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5370 /* This is required by WaCatErrorRejectionIssue:vlv */
5371 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5372 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5373 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5375 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5376 * gating disable must be set. Failure to set it results in
5377 * flickering pixels due to Z write ordering failures after
5378 * some amount of runtime in the Mesa "fire" demo, and Unigine
5379 * Sanctuary and Tropics, and apparently anything else with
5380 * alpha test or pixel discard.
5382 * According to the spec, bit 11 (RCCUNIT) must also be set,
5383 * but we didn't debug actual testcases to find it out.
5385 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5386 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
5388 * Also apply WaDisableVDSUnitClockGating:vlv and
5389 * WaDisableRCPBUnitClockGating:vlv.
5391 I915_WRITE(GEN6_UCGCTL2
,
5392 GEN7_VDSUNIT_CLOCK_GATE_DISABLE
|
5393 GEN7_TDLUNIT_CLOCK_GATE_DISABLE
|
5394 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
|
5395 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
5396 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5398 I915_WRITE(GEN7_UCGCTL4
, GEN7_L3BANK2X_CLOCK_GATE_DISABLE
);
5400 I915_WRITE(MI_ARB_VLV
, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
);
5402 I915_WRITE(CACHE_MODE_1
,
5403 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5406 * WaDisableVLVClockGating_VBIIssue:vlv
5407 * Disable clock gating on th GCFG unit to prevent a delay
5408 * in the reporting of vblank events.
5410 I915_WRITE(VLV_GUNIT_CLOCK_GATE
, 0xffffffff);
5412 /* Conservative clock gating settings for now */
5413 I915_WRITE(0x9400, 0xffffffff);
5414 I915_WRITE(0x9404, 0xffffffff);
5415 I915_WRITE(0x9408, 0xffffffff);
5416 I915_WRITE(0x940c, 0xffffffff);
5417 I915_WRITE(0x9410, 0xffffffff);
5418 I915_WRITE(0x9414, 0xffffffff);
5419 I915_WRITE(0x9418, 0xffffffff);
5422 static void g4x_init_clock_gating(struct drm_device
*dev
)
5424 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5425 uint32_t dspclk_gate
;
5427 I915_WRITE(RENCLK_GATE_D1
, 0);
5428 I915_WRITE(RENCLK_GATE_D2
, VF_UNIT_CLOCK_GATE_DISABLE
|
5429 GS_UNIT_CLOCK_GATE_DISABLE
|
5430 CL_UNIT_CLOCK_GATE_DISABLE
);
5431 I915_WRITE(RAMCLK_GATE_D
, 0);
5432 dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
|
5433 OVRUNIT_CLOCK_GATE_DISABLE
|
5434 OVCUNIT_CLOCK_GATE_DISABLE
;
5436 dspclk_gate
|= DSSUNIT_CLOCK_GATE_DISABLE
;
5437 I915_WRITE(DSPCLK_GATE_D
, dspclk_gate
);
5439 /* WaDisableRenderCachePipelinedFlush */
5440 I915_WRITE(CACHE_MODE_0
,
5441 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
5443 g4x_disable_trickle_feed(dev
);
5446 static void crestline_init_clock_gating(struct drm_device
*dev
)
5448 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5450 I915_WRITE(RENCLK_GATE_D1
, I965_RCC_CLOCK_GATE_DISABLE
);
5451 I915_WRITE(RENCLK_GATE_D2
, 0);
5452 I915_WRITE(DSPCLK_GATE_D
, 0);
5453 I915_WRITE(RAMCLK_GATE_D
, 0);
5454 I915_WRITE16(DEUC
, 0);
5455 I915_WRITE(MI_ARB_STATE
,
5456 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
5459 static void broadwater_init_clock_gating(struct drm_device
*dev
)
5461 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5463 I915_WRITE(RENCLK_GATE_D1
, I965_RCZ_CLOCK_GATE_DISABLE
|
5464 I965_RCC_CLOCK_GATE_DISABLE
|
5465 I965_RCPB_CLOCK_GATE_DISABLE
|
5466 I965_ISC_CLOCK_GATE_DISABLE
|
5467 I965_FBC_CLOCK_GATE_DISABLE
);
5468 I915_WRITE(RENCLK_GATE_D2
, 0);
5469 I915_WRITE(MI_ARB_STATE
,
5470 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
5473 static void gen3_init_clock_gating(struct drm_device
*dev
)
5475 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5476 u32 dstate
= I915_READ(D_STATE
);
5478 dstate
|= DSTATE_PLL_D3_OFF
| DSTATE_GFX_CLOCK_GATING
|
5479 DSTATE_DOT_CLOCK_GATING
;
5480 I915_WRITE(D_STATE
, dstate
);
5482 if (IS_PINEVIEW(dev
))
5483 I915_WRITE(ECOSKPD
, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY
));
5485 /* IIR "flip pending" means done if this bit is set */
5486 I915_WRITE(ECOSKPD
, _MASKED_BIT_DISABLE(ECO_FLIP_DONE
));
5489 static void i85x_init_clock_gating(struct drm_device
*dev
)
5491 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5493 I915_WRITE(RENCLK_GATE_D1
, SV_CLOCK_GATE_DISABLE
);
5496 static void i830_init_clock_gating(struct drm_device
*dev
)
5498 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5500 I915_WRITE(DSPCLK_GATE_D
, OVRUNIT_CLOCK_GATE_DISABLE
);
5503 void intel_init_clock_gating(struct drm_device
*dev
)
5505 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5507 dev_priv
->display
.init_clock_gating(dev
);
5510 void intel_suspend_hw(struct drm_device
*dev
)
5512 if (HAS_PCH_LPT(dev
))
5513 lpt_suspend_hw(dev
);
5516 static bool is_always_on_power_domain(struct drm_device
*dev
,
5517 enum intel_display_power_domain domain
)
5519 unsigned long always_on_domains
;
5521 BUG_ON(BIT(domain
) & ~POWER_DOMAIN_MASK
);
5523 if (IS_HASWELL(dev
)) {
5524 always_on_domains
= HSW_ALWAYS_ON_POWER_DOMAINS
;
5530 return BIT(domain
) & always_on_domains
;
5534 * We should only use the power well if we explicitly asked the hardware to
5535 * enable it, so check if it's enabled and also check if we've requested it to
5538 bool intel_display_power_enabled(struct drm_device
*dev
,
5539 enum intel_display_power_domain domain
)
5541 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5543 if (!HAS_POWER_WELL(dev
))
5546 if (is_always_on_power_domain(dev
, domain
))
5549 return I915_READ(HSW_PWR_WELL_DRIVER
) ==
5550 (HSW_PWR_WELL_ENABLE_REQUEST
| HSW_PWR_WELL_STATE_ENABLED
);
5553 static void __intel_set_power_well(struct drm_device
*dev
, bool enable
)
5555 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5556 bool is_enabled
, enable_requested
;
5559 tmp
= I915_READ(HSW_PWR_WELL_DRIVER
);
5560 is_enabled
= tmp
& HSW_PWR_WELL_STATE_ENABLED
;
5561 enable_requested
= tmp
& HSW_PWR_WELL_ENABLE_REQUEST
;
5564 if (!enable_requested
)
5565 I915_WRITE(HSW_PWR_WELL_DRIVER
,
5566 HSW_PWR_WELL_ENABLE_REQUEST
);
5569 DRM_DEBUG_KMS("Enabling power well\n");
5570 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER
) &
5571 HSW_PWR_WELL_STATE_ENABLED
), 20))
5572 DRM_ERROR("Timeout enabling power well\n");
5575 if (enable_requested
) {
5576 unsigned long irqflags
;
5579 I915_WRITE(HSW_PWR_WELL_DRIVER
, 0);
5580 POSTING_READ(HSW_PWR_WELL_DRIVER
);
5581 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5584 * After this, the registers on the pipes that are part
5585 * of the power well will become zero, so we have to
5586 * adjust our counters according to that.
5588 * FIXME: Should we do this in general in
5589 * drm_vblank_post_modeset?
5591 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
5594 dev
->vblank
[p
].last
= 0;
5595 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
5600 static void __intel_power_well_get(struct drm_device
*dev
,
5601 struct i915_power_well
*power_well
)
5603 if (!power_well
->count
++)
5604 __intel_set_power_well(dev
, true);
5607 static void __intel_power_well_put(struct drm_device
*dev
,
5608 struct i915_power_well
*power_well
)
5610 WARN_ON(!power_well
->count
);
5611 if (!--power_well
->count
&& i915_disable_power_well
)
5612 __intel_set_power_well(dev
, false);
5615 void intel_display_power_get(struct drm_device
*dev
,
5616 enum intel_display_power_domain domain
)
5618 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5619 struct i915_power_domains
*power_domains
;
5621 if (!HAS_POWER_WELL(dev
))
5624 if (is_always_on_power_domain(dev
, domain
))
5627 power_domains
= &dev_priv
->power_domains
;
5629 mutex_lock(&power_domains
->lock
);
5630 __intel_power_well_get(dev
, &power_domains
->power_wells
[0]);
5631 mutex_unlock(&power_domains
->lock
);
5634 void intel_display_power_put(struct drm_device
*dev
,
5635 enum intel_display_power_domain domain
)
5637 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5638 struct i915_power_domains
*power_domains
;
5640 if (!HAS_POWER_WELL(dev
))
5643 if (is_always_on_power_domain(dev
, domain
))
5646 power_domains
= &dev_priv
->power_domains
;
5648 mutex_lock(&power_domains
->lock
);
5649 __intel_power_well_put(dev
, &power_domains
->power_wells
[0]);
5650 mutex_unlock(&power_domains
->lock
);
5653 static struct i915_power_domains
*hsw_pwr
;
5655 /* Display audio driver power well request */
5656 void i915_request_power_well(void)
5658 struct drm_i915_private
*dev_priv
;
5660 if (WARN_ON(!hsw_pwr
))
5663 dev_priv
= container_of(hsw_pwr
, struct drm_i915_private
,
5666 mutex_lock(&hsw_pwr
->lock
);
5667 __intel_power_well_get(dev_priv
->dev
, &hsw_pwr
->power_wells
[0]);
5668 mutex_unlock(&hsw_pwr
->lock
);
5670 EXPORT_SYMBOL_GPL(i915_request_power_well
);
5672 /* Display audio driver power well release */
5673 void i915_release_power_well(void)
5675 struct drm_i915_private
*dev_priv
;
5677 if (WARN_ON(!hsw_pwr
))
5680 dev_priv
= container_of(hsw_pwr
, struct drm_i915_private
,
5683 mutex_lock(&hsw_pwr
->lock
);
5684 __intel_power_well_put(dev_priv
->dev
, &hsw_pwr
->power_wells
[0]);
5685 mutex_unlock(&hsw_pwr
->lock
);
5687 EXPORT_SYMBOL_GPL(i915_release_power_well
);
5689 int intel_power_domains_init(struct drm_device
*dev
)
5691 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5692 struct i915_power_domains
*power_domains
= &dev_priv
->power_domains
;
5693 struct i915_power_well
*power_well
;
5695 mutex_init(&power_domains
->lock
);
5696 hsw_pwr
= power_domains
;
5698 power_well
= &power_domains
->power_wells
[0];
5699 power_well
->count
= 0;
5704 void intel_power_domains_remove(struct drm_device
*dev
)
5709 static void intel_power_domains_resume(struct drm_device
*dev
)
5711 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5712 struct i915_power_domains
*power_domains
= &dev_priv
->power_domains
;
5713 struct i915_power_well
*power_well
;
5715 if (!HAS_POWER_WELL(dev
))
5718 mutex_lock(&power_domains
->lock
);
5720 power_well
= &power_domains
->power_wells
[0];
5721 __intel_set_power_well(dev
, power_well
->count
> 0);
5723 mutex_unlock(&power_domains
->lock
);
5727 * Starting with Haswell, we have a "Power Down Well" that can be turned off
5728 * when not needed anymore. We have 4 registers that can request the power well
5729 * to be enabled, and it will only be disabled if none of the registers is
5730 * requesting it to be enabled.
5732 void intel_power_domains_init_hw(struct drm_device
*dev
)
5734 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5736 if (!HAS_POWER_WELL(dev
))
5739 /* For now, we need the power well to be always enabled. */
5740 intel_display_set_init_power(dev
, true);
5741 intel_power_domains_resume(dev
);
5743 /* We're taking over the BIOS, so clear any requests made by it since
5744 * the driver is in charge now. */
5745 if (I915_READ(HSW_PWR_WELL_BIOS
) & HSW_PWR_WELL_ENABLE_REQUEST
)
5746 I915_WRITE(HSW_PWR_WELL_BIOS
, 0);
5749 /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */
5750 void intel_aux_display_runtime_get(struct drm_i915_private
*dev_priv
)
5752 hsw_disable_package_c8(dev_priv
);
5755 void intel_aux_display_runtime_put(struct drm_i915_private
*dev_priv
)
5757 hsw_enable_package_c8(dev_priv
);
5760 /* Set up chip specific power management-related functions */
5761 void intel_init_pm(struct drm_device
*dev
)
5763 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5765 if (I915_HAS_FBC(dev
)) {
5766 if (HAS_PCH_SPLIT(dev
)) {
5767 dev_priv
->display
.fbc_enabled
= ironlake_fbc_enabled
;
5768 if (IS_IVYBRIDGE(dev
) || IS_HASWELL(dev
))
5769 dev_priv
->display
.enable_fbc
=
5772 dev_priv
->display
.enable_fbc
=
5773 ironlake_enable_fbc
;
5774 dev_priv
->display
.disable_fbc
= ironlake_disable_fbc
;
5775 } else if (IS_GM45(dev
)) {
5776 dev_priv
->display
.fbc_enabled
= g4x_fbc_enabled
;
5777 dev_priv
->display
.enable_fbc
= g4x_enable_fbc
;
5778 dev_priv
->display
.disable_fbc
= g4x_disable_fbc
;
5779 } else if (IS_CRESTLINE(dev
)) {
5780 dev_priv
->display
.fbc_enabled
= i8xx_fbc_enabled
;
5781 dev_priv
->display
.enable_fbc
= i8xx_enable_fbc
;
5782 dev_priv
->display
.disable_fbc
= i8xx_disable_fbc
;
5784 /* 855GM needs testing */
5788 if (IS_PINEVIEW(dev
))
5789 i915_pineview_get_mem_freq(dev
);
5790 else if (IS_GEN5(dev
))
5791 i915_ironlake_get_mem_freq(dev
);
5793 /* For FIFO watermark updates */
5794 if (HAS_PCH_SPLIT(dev
)) {
5795 intel_setup_wm_latency(dev
);
5798 if (dev_priv
->wm
.pri_latency
[1] &&
5799 dev_priv
->wm
.spr_latency
[1] &&
5800 dev_priv
->wm
.cur_latency
[1])
5801 dev_priv
->display
.update_wm
= ironlake_update_wm
;
5803 DRM_DEBUG_KMS("Failed to get proper latency. "
5805 dev_priv
->display
.update_wm
= NULL
;
5807 dev_priv
->display
.init_clock_gating
= ironlake_init_clock_gating
;
5808 } else if (IS_GEN6(dev
)) {
5809 if (dev_priv
->wm
.pri_latency
[0] &&
5810 dev_priv
->wm
.spr_latency
[0] &&
5811 dev_priv
->wm
.cur_latency
[0]) {
5812 dev_priv
->display
.update_wm
= sandybridge_update_wm
;
5813 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
5815 DRM_DEBUG_KMS("Failed to read display plane latency. "
5817 dev_priv
->display
.update_wm
= NULL
;
5819 dev_priv
->display
.init_clock_gating
= gen6_init_clock_gating
;
5820 } else if (IS_IVYBRIDGE(dev
)) {
5821 if (dev_priv
->wm
.pri_latency
[0] &&
5822 dev_priv
->wm
.spr_latency
[0] &&
5823 dev_priv
->wm
.cur_latency
[0]) {
5824 dev_priv
->display
.update_wm
= ivybridge_update_wm
;
5825 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
5827 DRM_DEBUG_KMS("Failed to read display plane latency. "
5829 dev_priv
->display
.update_wm
= NULL
;
5831 dev_priv
->display
.init_clock_gating
= ivybridge_init_clock_gating
;
5832 } else if (IS_HASWELL(dev
)) {
5833 if (dev_priv
->wm
.pri_latency
[0] &&
5834 dev_priv
->wm
.spr_latency
[0] &&
5835 dev_priv
->wm
.cur_latency
[0]) {
5836 dev_priv
->display
.update_wm
= haswell_update_wm
;
5837 dev_priv
->display
.update_sprite_wm
=
5838 haswell_update_sprite_wm
;
5840 DRM_DEBUG_KMS("Failed to read display plane latency. "
5842 dev_priv
->display
.update_wm
= NULL
;
5844 dev_priv
->display
.init_clock_gating
= haswell_init_clock_gating
;
5845 } else if (INTEL_INFO(dev
)->gen
== 8) {
5846 dev_priv
->display
.init_clock_gating
= gen8_init_clock_gating
;
5848 dev_priv
->display
.update_wm
= NULL
;
5849 } else if (IS_VALLEYVIEW(dev
)) {
5850 dev_priv
->display
.update_wm
= valleyview_update_wm
;
5851 dev_priv
->display
.init_clock_gating
=
5852 valleyview_init_clock_gating
;
5853 } else if (IS_PINEVIEW(dev
)) {
5854 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev
),
5857 dev_priv
->mem_freq
)) {
5858 DRM_INFO("failed to find known CxSR latency "
5859 "(found ddr%s fsb freq %d, mem freq %d), "
5861 (dev_priv
->is_ddr3
== 1) ? "3" : "2",
5862 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
5863 /* Disable CxSR and never update its watermark again */
5864 pineview_disable_cxsr(dev
);
5865 dev_priv
->display
.update_wm
= NULL
;
5867 dev_priv
->display
.update_wm
= pineview_update_wm
;
5868 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
5869 } else if (IS_G4X(dev
)) {
5870 dev_priv
->display
.update_wm
= g4x_update_wm
;
5871 dev_priv
->display
.init_clock_gating
= g4x_init_clock_gating
;
5872 } else if (IS_GEN4(dev
)) {
5873 dev_priv
->display
.update_wm
= i965_update_wm
;
5874 if (IS_CRESTLINE(dev
))
5875 dev_priv
->display
.init_clock_gating
= crestline_init_clock_gating
;
5876 else if (IS_BROADWATER(dev
))
5877 dev_priv
->display
.init_clock_gating
= broadwater_init_clock_gating
;
5878 } else if (IS_GEN3(dev
)) {
5879 dev_priv
->display
.update_wm
= i9xx_update_wm
;
5880 dev_priv
->display
.get_fifo_size
= i9xx_get_fifo_size
;
5881 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
5882 } else if (IS_I865G(dev
)) {
5883 dev_priv
->display
.update_wm
= i830_update_wm
;
5884 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
5885 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
5886 } else if (IS_I85X(dev
)) {
5887 dev_priv
->display
.update_wm
= i9xx_update_wm
;
5888 dev_priv
->display
.get_fifo_size
= i85x_get_fifo_size
;
5889 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
5891 dev_priv
->display
.update_wm
= i830_update_wm
;
5892 dev_priv
->display
.init_clock_gating
= i830_init_clock_gating
;
5894 dev_priv
->display
.get_fifo_size
= i845_get_fifo_size
;
5896 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
5900 int sandybridge_pcode_read(struct drm_i915_private
*dev_priv
, u8 mbox
, u32
*val
)
5902 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5904 if (I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
5905 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
5909 I915_WRITE(GEN6_PCODE_DATA
, *val
);
5910 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
5912 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
5914 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox
);
5918 *val
= I915_READ(GEN6_PCODE_DATA
);
5919 I915_WRITE(GEN6_PCODE_DATA
, 0);
5924 int sandybridge_pcode_write(struct drm_i915_private
*dev_priv
, u8 mbox
, u32 val
)
5926 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5928 if (I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
5929 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
5933 I915_WRITE(GEN6_PCODE_DATA
, val
);
5934 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
5936 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
5938 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox
);
5942 I915_WRITE(GEN6_PCODE_DATA
, 0);
5947 int vlv_gpu_freq(int ddr_freq
, int val
)
5968 return ((val
- 0xbd) * mult
) + base
;
5971 int vlv_freq_opcode(int ddr_freq
, int val
)
6002 void intel_pm_init(struct drm_device
*dev
)
6004 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
6006 INIT_DELAYED_WORK(&dev_priv
->rps
.delayed_resume_work
,
6007 intel_gen6_powersave_work
);