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>
34 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
35 * framebuffer contents in-memory, aiming at reducing the required bandwidth
36 * during in-memory transfers and, therefore, reduce the power packet.
38 * The benefits of FBC are mostly visible with solid backgrounds and
39 * variation-less patterns.
41 * FBC-related functionality can be enabled by the means of the
42 * i915.i915_enable_fbc parameter
45 static void i8xx_disable_fbc(struct drm_device
*dev
)
47 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
50 /* Disable compression */
51 fbc_ctl
= I915_READ(FBC_CONTROL
);
52 if ((fbc_ctl
& FBC_CTL_EN
) == 0)
55 fbc_ctl
&= ~FBC_CTL_EN
;
56 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
58 /* Wait for compressing bit to clear */
59 if (wait_for((I915_READ(FBC_STATUS
) & FBC_STAT_COMPRESSING
) == 0, 10)) {
60 DRM_DEBUG_KMS("FBC idle timed out\n");
64 DRM_DEBUG_KMS("disabled FBC\n");
67 static void i8xx_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
69 struct drm_device
*dev
= crtc
->dev
;
70 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
71 struct drm_framebuffer
*fb
= crtc
->fb
;
72 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
73 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
74 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
77 u32 fbc_ctl
, fbc_ctl2
;
79 cfb_pitch
= dev_priv
->cfb_size
/ FBC_LL_SIZE
;
80 if (fb
->pitches
[0] < cfb_pitch
)
81 cfb_pitch
= fb
->pitches
[0];
83 /* FBC_CTL wants 64B units */
84 cfb_pitch
= (cfb_pitch
/ 64) - 1;
85 plane
= intel_crtc
->plane
== 0 ? FBC_CTL_PLANEA
: FBC_CTL_PLANEB
;
88 for (i
= 0; i
< (FBC_LL_SIZE
/ 32) + 1; i
++)
89 I915_WRITE(FBC_TAG
+ (i
* 4), 0);
92 fbc_ctl2
= FBC_CTL_FENCE_DBL
| FBC_CTL_IDLE_IMM
| FBC_CTL_CPU_FENCE
;
94 I915_WRITE(FBC_CONTROL2
, fbc_ctl2
);
95 I915_WRITE(FBC_FENCE_OFF
, crtc
->y
);
98 fbc_ctl
= FBC_CTL_EN
| FBC_CTL_PERIODIC
;
100 fbc_ctl
|= FBC_CTL_C3_IDLE
; /* 945 needs special SR handling */
101 fbc_ctl
|= (cfb_pitch
& 0xff) << FBC_CTL_STRIDE_SHIFT
;
102 fbc_ctl
|= (interval
& 0x2fff) << FBC_CTL_INTERVAL_SHIFT
;
103 fbc_ctl
|= obj
->fence_reg
;
104 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
106 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %d, ",
107 cfb_pitch
, crtc
->y
, intel_crtc
->plane
);
110 static bool i8xx_fbc_enabled(struct drm_device
*dev
)
112 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
114 return I915_READ(FBC_CONTROL
) & FBC_CTL_EN
;
117 static void g4x_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
119 struct drm_device
*dev
= crtc
->dev
;
120 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
121 struct drm_framebuffer
*fb
= crtc
->fb
;
122 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
123 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
124 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
125 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
126 unsigned long stall_watermark
= 200;
129 dpfc_ctl
= plane
| DPFC_SR_EN
| DPFC_CTL_LIMIT_1X
;
130 dpfc_ctl
|= DPFC_CTL_FENCE_EN
| obj
->fence_reg
;
131 I915_WRITE(DPFC_CHICKEN
, DPFC_HT_MODIFY
);
133 I915_WRITE(DPFC_RECOMP_CTL
, DPFC_RECOMP_STALL_EN
|
134 (stall_watermark
<< DPFC_RECOMP_STALL_WM_SHIFT
) |
135 (interval
<< DPFC_RECOMP_TIMER_COUNT_SHIFT
));
136 I915_WRITE(DPFC_FENCE_YOFF
, crtc
->y
);
139 I915_WRITE(DPFC_CONTROL
, I915_READ(DPFC_CONTROL
) | DPFC_CTL_EN
);
141 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc
->plane
);
144 static void g4x_disable_fbc(struct drm_device
*dev
)
146 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
149 /* Disable compression */
150 dpfc_ctl
= I915_READ(DPFC_CONTROL
);
151 if (dpfc_ctl
& DPFC_CTL_EN
) {
152 dpfc_ctl
&= ~DPFC_CTL_EN
;
153 I915_WRITE(DPFC_CONTROL
, dpfc_ctl
);
155 DRM_DEBUG_KMS("disabled FBC\n");
159 static bool g4x_fbc_enabled(struct drm_device
*dev
)
161 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
163 return I915_READ(DPFC_CONTROL
) & DPFC_CTL_EN
;
166 static void sandybridge_blit_fbc_update(struct drm_device
*dev
)
168 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
171 /* Make sure blitter notifies FBC of writes */
172 gen6_gt_force_wake_get(dev_priv
);
173 blt_ecoskpd
= I915_READ(GEN6_BLITTER_ECOSKPD
);
174 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
<<
175 GEN6_BLITTER_LOCK_SHIFT
;
176 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
177 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
;
178 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
179 blt_ecoskpd
&= ~(GEN6_BLITTER_FBC_NOTIFY
<<
180 GEN6_BLITTER_LOCK_SHIFT
);
181 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
182 POSTING_READ(GEN6_BLITTER_ECOSKPD
);
183 gen6_gt_force_wake_put(dev_priv
);
186 static void ironlake_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
188 struct drm_device
*dev
= crtc
->dev
;
189 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
190 struct drm_framebuffer
*fb
= crtc
->fb
;
191 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
192 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
193 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
194 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
195 unsigned long stall_watermark
= 200;
198 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
199 dpfc_ctl
&= DPFC_RESERVED
;
200 dpfc_ctl
|= (plane
| DPFC_CTL_LIMIT_1X
);
201 /* Set persistent mode for front-buffer rendering, ala X. */
202 dpfc_ctl
|= DPFC_CTL_PERSISTENT_MODE
;
203 dpfc_ctl
|= (DPFC_CTL_FENCE_EN
| obj
->fence_reg
);
204 I915_WRITE(ILK_DPFC_CHICKEN
, DPFC_HT_MODIFY
);
206 I915_WRITE(ILK_DPFC_RECOMP_CTL
, DPFC_RECOMP_STALL_EN
|
207 (stall_watermark
<< DPFC_RECOMP_STALL_WM_SHIFT
) |
208 (interval
<< DPFC_RECOMP_TIMER_COUNT_SHIFT
));
209 I915_WRITE(ILK_DPFC_FENCE_YOFF
, crtc
->y
);
210 I915_WRITE(ILK_FBC_RT_BASE
, obj
->gtt_offset
| ILK_FBC_RT_VALID
);
212 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
| DPFC_CTL_EN
);
215 I915_WRITE(SNB_DPFC_CTL_SA
,
216 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
217 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
218 sandybridge_blit_fbc_update(dev
);
221 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc
->plane
);
224 static void ironlake_disable_fbc(struct drm_device
*dev
)
226 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
229 /* Disable compression */
230 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
231 if (dpfc_ctl
& DPFC_CTL_EN
) {
232 dpfc_ctl
&= ~DPFC_CTL_EN
;
233 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
);
235 DRM_DEBUG_KMS("disabled FBC\n");
239 static bool ironlake_fbc_enabled(struct drm_device
*dev
)
241 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
243 return I915_READ(ILK_DPFC_CONTROL
) & DPFC_CTL_EN
;
246 bool intel_fbc_enabled(struct drm_device
*dev
)
248 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
250 if (!dev_priv
->display
.fbc_enabled
)
253 return dev_priv
->display
.fbc_enabled(dev
);
256 static void intel_fbc_work_fn(struct work_struct
*__work
)
258 struct intel_fbc_work
*work
=
259 container_of(to_delayed_work(__work
),
260 struct intel_fbc_work
, work
);
261 struct drm_device
*dev
= work
->crtc
->dev
;
262 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
264 mutex_lock(&dev
->struct_mutex
);
265 if (work
== dev_priv
->fbc_work
) {
266 /* Double check that we haven't switched fb without cancelling
269 if (work
->crtc
->fb
== work
->fb
) {
270 dev_priv
->display
.enable_fbc(work
->crtc
,
273 dev_priv
->cfb_plane
= to_intel_crtc(work
->crtc
)->plane
;
274 dev_priv
->cfb_fb
= work
->crtc
->fb
->base
.id
;
275 dev_priv
->cfb_y
= work
->crtc
->y
;
278 dev_priv
->fbc_work
= NULL
;
280 mutex_unlock(&dev
->struct_mutex
);
285 static void intel_cancel_fbc_work(struct drm_i915_private
*dev_priv
)
287 if (dev_priv
->fbc_work
== NULL
)
290 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
292 /* Synchronisation is provided by struct_mutex and checking of
293 * dev_priv->fbc_work, so we can perform the cancellation
294 * entirely asynchronously.
296 if (cancel_delayed_work(&dev_priv
->fbc_work
->work
))
297 /* tasklet was killed before being run, clean up */
298 kfree(dev_priv
->fbc_work
);
300 /* Mark the work as no longer wanted so that if it does
301 * wake-up (because the work was already running and waiting
302 * for our mutex), it will discover that is no longer
305 dev_priv
->fbc_work
= NULL
;
308 void intel_enable_fbc(struct drm_crtc
*crtc
, unsigned long interval
)
310 struct intel_fbc_work
*work
;
311 struct drm_device
*dev
= crtc
->dev
;
312 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
314 if (!dev_priv
->display
.enable_fbc
)
317 intel_cancel_fbc_work(dev_priv
);
319 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
321 dev_priv
->display
.enable_fbc(crtc
, interval
);
327 work
->interval
= interval
;
328 INIT_DELAYED_WORK(&work
->work
, intel_fbc_work_fn
);
330 dev_priv
->fbc_work
= work
;
332 DRM_DEBUG_KMS("scheduling delayed FBC enable\n");
334 /* Delay the actual enabling to let pageflipping cease and the
335 * display to settle before starting the compression. Note that
336 * this delay also serves a second purpose: it allows for a
337 * vblank to pass after disabling the FBC before we attempt
338 * to modify the control registers.
340 * A more complicated solution would involve tracking vblanks
341 * following the termination of the page-flipping sequence
342 * and indeed performing the enable as a co-routine and not
343 * waiting synchronously upon the vblank.
345 schedule_delayed_work(&work
->work
, msecs_to_jiffies(50));
348 void intel_disable_fbc(struct drm_device
*dev
)
350 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
352 intel_cancel_fbc_work(dev_priv
);
354 if (!dev_priv
->display
.disable_fbc
)
357 dev_priv
->display
.disable_fbc(dev
);
358 dev_priv
->cfb_plane
= -1;
362 * intel_update_fbc - enable/disable FBC as needed
363 * @dev: the drm_device
365 * Set up the framebuffer compression hardware at mode set time. We
366 * enable it if possible:
367 * - plane A only (on pre-965)
368 * - no pixel mulitply/line duplication
369 * - no alpha buffer discard
371 * - framebuffer <= 2048 in width, 1536 in height
373 * We can't assume that any compression will take place (worst case),
374 * so the compressed buffer has to be the same size as the uncompressed
375 * one. It also must reside (along with the line length buffer) in
378 * We need to enable/disable FBC on a global basis.
380 void intel_update_fbc(struct drm_device
*dev
)
382 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
383 struct drm_crtc
*crtc
= NULL
, *tmp_crtc
;
384 struct intel_crtc
*intel_crtc
;
385 struct drm_framebuffer
*fb
;
386 struct intel_framebuffer
*intel_fb
;
387 struct drm_i915_gem_object
*obj
;
395 if (!I915_HAS_FBC(dev
))
399 * If FBC is already on, we just have to verify that we can
400 * keep it that way...
401 * Need to disable if:
402 * - more than one pipe is active
403 * - changing FBC params (stride, fence, mode)
404 * - new fb is too large to fit in compressed buffer
405 * - going to an unsupported config (interlace, pixel multiply, etc.)
407 list_for_each_entry(tmp_crtc
, &dev
->mode_config
.crtc_list
, head
) {
408 if (tmp_crtc
->enabled
&& tmp_crtc
->fb
) {
410 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
411 dev_priv
->no_fbc_reason
= FBC_MULTIPLE_PIPES
;
418 if (!crtc
|| crtc
->fb
== NULL
) {
419 DRM_DEBUG_KMS("no output, disabling\n");
420 dev_priv
->no_fbc_reason
= FBC_NO_OUTPUT
;
424 intel_crtc
= to_intel_crtc(crtc
);
426 intel_fb
= to_intel_framebuffer(fb
);
429 enable_fbc
= i915_enable_fbc
;
430 if (enable_fbc
< 0) {
431 DRM_DEBUG_KMS("fbc set to per-chip default\n");
433 if (INTEL_INFO(dev
)->gen
<= 6)
437 DRM_DEBUG_KMS("fbc disabled per module param\n");
438 dev_priv
->no_fbc_reason
= FBC_MODULE_PARAM
;
441 if (intel_fb
->obj
->base
.size
> dev_priv
->cfb_size
) {
442 DRM_DEBUG_KMS("framebuffer too large, disabling "
444 dev_priv
->no_fbc_reason
= FBC_STOLEN_TOO_SMALL
;
447 if ((crtc
->mode
.flags
& DRM_MODE_FLAG_INTERLACE
) ||
448 (crtc
->mode
.flags
& DRM_MODE_FLAG_DBLSCAN
)) {
449 DRM_DEBUG_KMS("mode incompatible with compression, "
451 dev_priv
->no_fbc_reason
= FBC_UNSUPPORTED_MODE
;
454 if ((crtc
->mode
.hdisplay
> 2048) ||
455 (crtc
->mode
.vdisplay
> 1536)) {
456 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
457 dev_priv
->no_fbc_reason
= FBC_MODE_TOO_LARGE
;
460 if ((IS_I915GM(dev
) || IS_I945GM(dev
)) && intel_crtc
->plane
!= 0) {
461 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
462 dev_priv
->no_fbc_reason
= FBC_BAD_PLANE
;
466 /* The use of a CPU fence is mandatory in order to detect writes
467 * by the CPU to the scanout and trigger updates to the FBC.
469 if (obj
->tiling_mode
!= I915_TILING_X
||
470 obj
->fence_reg
== I915_FENCE_REG_NONE
) {
471 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
472 dev_priv
->no_fbc_reason
= FBC_NOT_TILED
;
476 /* If the kernel debugger is active, always disable compression */
480 /* If the scanout has not changed, don't modify the FBC settings.
481 * Note that we make the fundamental assumption that the fb->obj
482 * cannot be unpinned (and have its GTT offset and fence revoked)
483 * without first being decoupled from the scanout and FBC disabled.
485 if (dev_priv
->cfb_plane
== intel_crtc
->plane
&&
486 dev_priv
->cfb_fb
== fb
->base
.id
&&
487 dev_priv
->cfb_y
== crtc
->y
)
490 if (intel_fbc_enabled(dev
)) {
491 /* We update FBC along two paths, after changing fb/crtc
492 * configuration (modeswitching) and after page-flipping
493 * finishes. For the latter, we know that not only did
494 * we disable the FBC at the start of the page-flip
495 * sequence, but also more than one vblank has passed.
497 * For the former case of modeswitching, it is possible
498 * to switch between two FBC valid configurations
499 * instantaneously so we do need to disable the FBC
500 * before we can modify its control registers. We also
501 * have to wait for the next vblank for that to take
502 * effect. However, since we delay enabling FBC we can
503 * assume that a vblank has passed since disabling and
504 * that we can safely alter the registers in the deferred
507 * In the scenario that we go from a valid to invalid
508 * and then back to valid FBC configuration we have
509 * no strict enforcement that a vblank occurred since
510 * disabling the FBC. However, along all current pipe
511 * disabling paths we do need to wait for a vblank at
512 * some point. And we wait before enabling FBC anyway.
514 DRM_DEBUG_KMS("disabling active FBC for update\n");
515 intel_disable_fbc(dev
);
518 intel_enable_fbc(crtc
, 500);
522 /* Multiple disables should be harmless */
523 if (intel_fbc_enabled(dev
)) {
524 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
525 intel_disable_fbc(dev
);
529 static void i915_pineview_get_mem_freq(struct drm_device
*dev
)
531 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
534 tmp
= I915_READ(CLKCFG
);
536 switch (tmp
& CLKCFG_FSB_MASK
) {
538 dev_priv
->fsb_freq
= 533; /* 133*4 */
541 dev_priv
->fsb_freq
= 800; /* 200*4 */
544 dev_priv
->fsb_freq
= 667; /* 167*4 */
547 dev_priv
->fsb_freq
= 400; /* 100*4 */
551 switch (tmp
& CLKCFG_MEM_MASK
) {
553 dev_priv
->mem_freq
= 533;
556 dev_priv
->mem_freq
= 667;
559 dev_priv
->mem_freq
= 800;
563 /* detect pineview DDR3 setting */
564 tmp
= I915_READ(CSHRDDR3CTL
);
565 dev_priv
->is_ddr3
= (tmp
& CSHRDDR3CTL_DDR3
) ? 1 : 0;
568 static void i915_ironlake_get_mem_freq(struct drm_device
*dev
)
570 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
573 ddrpll
= I915_READ16(DDRMPLL1
);
574 csipll
= I915_READ16(CSIPLL0
);
576 switch (ddrpll
& 0xff) {
578 dev_priv
->mem_freq
= 800;
581 dev_priv
->mem_freq
= 1066;
584 dev_priv
->mem_freq
= 1333;
587 dev_priv
->mem_freq
= 1600;
590 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
592 dev_priv
->mem_freq
= 0;
596 dev_priv
->r_t
= dev_priv
->mem_freq
;
598 switch (csipll
& 0x3ff) {
600 dev_priv
->fsb_freq
= 3200;
603 dev_priv
->fsb_freq
= 3733;
606 dev_priv
->fsb_freq
= 4266;
609 dev_priv
->fsb_freq
= 4800;
612 dev_priv
->fsb_freq
= 5333;
615 dev_priv
->fsb_freq
= 5866;
618 dev_priv
->fsb_freq
= 6400;
621 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
623 dev_priv
->fsb_freq
= 0;
627 if (dev_priv
->fsb_freq
== 3200) {
629 } else if (dev_priv
->fsb_freq
> 3200 && dev_priv
->fsb_freq
<= 4800) {
636 static const struct cxsr_latency cxsr_latency_table
[] = {
637 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
638 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
639 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
640 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
641 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
643 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
644 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
645 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
646 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
647 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
649 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
650 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
651 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
652 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
653 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
655 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
656 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
657 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
658 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
659 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
661 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
662 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
663 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
664 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
665 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
667 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
668 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
669 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
670 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
671 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
674 static const struct cxsr_latency
*intel_get_cxsr_latency(int is_desktop
,
679 const struct cxsr_latency
*latency
;
682 if (fsb
== 0 || mem
== 0)
685 for (i
= 0; i
< ARRAY_SIZE(cxsr_latency_table
); i
++) {
686 latency
= &cxsr_latency_table
[i
];
687 if (is_desktop
== latency
->is_desktop
&&
688 is_ddr3
== latency
->is_ddr3
&&
689 fsb
== latency
->fsb_freq
&& mem
== latency
->mem_freq
)
693 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
698 static void pineview_disable_cxsr(struct drm_device
*dev
)
700 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
702 /* deactivate cxsr */
703 I915_WRITE(DSPFW3
, I915_READ(DSPFW3
) & ~PINEVIEW_SELF_REFRESH_EN
);
707 * Latency for FIFO fetches is dependent on several factors:
708 * - memory configuration (speed, channels)
710 * - current MCH state
711 * It can be fairly high in some situations, so here we assume a fairly
712 * pessimal value. It's a tradeoff between extra memory fetches (if we
713 * set this value too high, the FIFO will fetch frequently to stay full)
714 * and power consumption (set it too low to save power and we might see
715 * FIFO underruns and display "flicker").
717 * A value of 5us seems to be a good balance; safe for very low end
718 * platforms but not overly aggressive on lower latency configs.
720 static const int latency_ns
= 5000;
722 static int i9xx_get_fifo_size(struct drm_device
*dev
, int plane
)
724 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
725 uint32_t dsparb
= I915_READ(DSPARB
);
728 size
= dsparb
& 0x7f;
730 size
= ((dsparb
>> DSPARB_CSTART_SHIFT
) & 0x7f) - size
;
732 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
733 plane
? "B" : "A", size
);
738 static int i85x_get_fifo_size(struct drm_device
*dev
, int plane
)
740 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
741 uint32_t dsparb
= I915_READ(DSPARB
);
744 size
= dsparb
& 0x1ff;
746 size
= ((dsparb
>> DSPARB_BEND_SHIFT
) & 0x1ff) - size
;
747 size
>>= 1; /* Convert to cachelines */
749 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
750 plane
? "B" : "A", size
);
755 static int i845_get_fifo_size(struct drm_device
*dev
, int plane
)
757 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
758 uint32_t dsparb
= I915_READ(DSPARB
);
761 size
= dsparb
& 0x7f;
762 size
>>= 2; /* Convert to cachelines */
764 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
771 static int i830_get_fifo_size(struct drm_device
*dev
, int plane
)
773 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
774 uint32_t dsparb
= I915_READ(DSPARB
);
777 size
= dsparb
& 0x7f;
778 size
>>= 1; /* Convert to cachelines */
780 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
781 plane
? "B" : "A", size
);
786 /* Pineview has different values for various configs */
787 static const struct intel_watermark_params pineview_display_wm
= {
788 PINEVIEW_DISPLAY_FIFO
,
792 PINEVIEW_FIFO_LINE_SIZE
794 static const struct intel_watermark_params pineview_display_hplloff_wm
= {
795 PINEVIEW_DISPLAY_FIFO
,
797 PINEVIEW_DFT_HPLLOFF_WM
,
799 PINEVIEW_FIFO_LINE_SIZE
801 static const struct intel_watermark_params pineview_cursor_wm
= {
802 PINEVIEW_CURSOR_FIFO
,
803 PINEVIEW_CURSOR_MAX_WM
,
804 PINEVIEW_CURSOR_DFT_WM
,
805 PINEVIEW_CURSOR_GUARD_WM
,
806 PINEVIEW_FIFO_LINE_SIZE
,
808 static const struct intel_watermark_params pineview_cursor_hplloff_wm
= {
809 PINEVIEW_CURSOR_FIFO
,
810 PINEVIEW_CURSOR_MAX_WM
,
811 PINEVIEW_CURSOR_DFT_WM
,
812 PINEVIEW_CURSOR_GUARD_WM
,
813 PINEVIEW_FIFO_LINE_SIZE
815 static const struct intel_watermark_params g4x_wm_info
= {
822 static const struct intel_watermark_params g4x_cursor_wm_info
= {
829 static const struct intel_watermark_params valleyview_wm_info
= {
830 VALLEYVIEW_FIFO_SIZE
,
836 static const struct intel_watermark_params valleyview_cursor_wm_info
= {
838 VALLEYVIEW_CURSOR_MAX_WM
,
843 static const struct intel_watermark_params i965_cursor_wm_info
= {
850 static const struct intel_watermark_params i945_wm_info
= {
857 static const struct intel_watermark_params i915_wm_info
= {
864 static const struct intel_watermark_params i855_wm_info
= {
871 static const struct intel_watermark_params i830_wm_info
= {
879 static const struct intel_watermark_params ironlake_display_wm_info
= {
886 static const struct intel_watermark_params ironlake_cursor_wm_info
= {
893 static const struct intel_watermark_params ironlake_display_srwm_info
= {
895 ILK_DISPLAY_MAX_SRWM
,
896 ILK_DISPLAY_DFT_SRWM
,
900 static const struct intel_watermark_params ironlake_cursor_srwm_info
= {
908 static const struct intel_watermark_params sandybridge_display_wm_info
= {
915 static const struct intel_watermark_params sandybridge_cursor_wm_info
= {
922 static const struct intel_watermark_params sandybridge_display_srwm_info
= {
924 SNB_DISPLAY_MAX_SRWM
,
925 SNB_DISPLAY_DFT_SRWM
,
929 static const struct intel_watermark_params sandybridge_cursor_srwm_info
= {
939 * intel_calculate_wm - calculate watermark level
940 * @clock_in_khz: pixel clock
941 * @wm: chip FIFO params
942 * @pixel_size: display pixel size
943 * @latency_ns: memory latency for the platform
945 * Calculate the watermark level (the level at which the display plane will
946 * start fetching from memory again). Each chip has a different display
947 * FIFO size and allocation, so the caller needs to figure that out and pass
948 * in the correct intel_watermark_params structure.
950 * As the pixel clock runs, the FIFO will be drained at a rate that depends
951 * on the pixel size. When it reaches the watermark level, it'll start
952 * fetching FIFO line sized based chunks from memory until the FIFO fills
953 * past the watermark point. If the FIFO drains completely, a FIFO underrun
954 * will occur, and a display engine hang could result.
956 static unsigned long intel_calculate_wm(unsigned long clock_in_khz
,
957 const struct intel_watermark_params
*wm
,
960 unsigned long latency_ns
)
962 long entries_required
, wm_size
;
965 * Note: we need to make sure we don't overflow for various clock &
967 * clocks go from a few thousand to several hundred thousand.
968 * latency is usually a few thousand
970 entries_required
= ((clock_in_khz
/ 1000) * pixel_size
* latency_ns
) /
972 entries_required
= DIV_ROUND_UP(entries_required
, wm
->cacheline_size
);
974 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required
);
976 wm_size
= fifo_size
- (entries_required
+ wm
->guard_size
);
978 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size
);
980 /* Don't promote wm_size to unsigned... */
981 if (wm_size
> (long)wm
->max_wm
)
982 wm_size
= wm
->max_wm
;
984 wm_size
= wm
->default_wm
;
988 static struct drm_crtc
*single_enabled_crtc(struct drm_device
*dev
)
990 struct drm_crtc
*crtc
, *enabled
= NULL
;
992 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
993 if (crtc
->enabled
&& crtc
->fb
) {
1003 static void pineview_update_wm(struct drm_device
*dev
)
1005 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1006 struct drm_crtc
*crtc
;
1007 const struct cxsr_latency
*latency
;
1011 latency
= intel_get_cxsr_latency(IS_PINEVIEW_G(dev
), dev_priv
->is_ddr3
,
1012 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
1014 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1015 pineview_disable_cxsr(dev
);
1019 crtc
= single_enabled_crtc(dev
);
1021 int clock
= crtc
->mode
.clock
;
1022 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1025 wm
= intel_calculate_wm(clock
, &pineview_display_wm
,
1026 pineview_display_wm
.fifo_size
,
1027 pixel_size
, latency
->display_sr
);
1028 reg
= I915_READ(DSPFW1
);
1029 reg
&= ~DSPFW_SR_MASK
;
1030 reg
|= wm
<< DSPFW_SR_SHIFT
;
1031 I915_WRITE(DSPFW1
, reg
);
1032 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg
);
1035 wm
= intel_calculate_wm(clock
, &pineview_cursor_wm
,
1036 pineview_display_wm
.fifo_size
,
1037 pixel_size
, latency
->cursor_sr
);
1038 reg
= I915_READ(DSPFW3
);
1039 reg
&= ~DSPFW_CURSOR_SR_MASK
;
1040 reg
|= (wm
& 0x3f) << DSPFW_CURSOR_SR_SHIFT
;
1041 I915_WRITE(DSPFW3
, reg
);
1043 /* Display HPLL off SR */
1044 wm
= intel_calculate_wm(clock
, &pineview_display_hplloff_wm
,
1045 pineview_display_hplloff_wm
.fifo_size
,
1046 pixel_size
, latency
->display_hpll_disable
);
1047 reg
= I915_READ(DSPFW3
);
1048 reg
&= ~DSPFW_HPLL_SR_MASK
;
1049 reg
|= wm
& DSPFW_HPLL_SR_MASK
;
1050 I915_WRITE(DSPFW3
, reg
);
1052 /* cursor HPLL off SR */
1053 wm
= intel_calculate_wm(clock
, &pineview_cursor_hplloff_wm
,
1054 pineview_display_hplloff_wm
.fifo_size
,
1055 pixel_size
, latency
->cursor_hpll_disable
);
1056 reg
= I915_READ(DSPFW3
);
1057 reg
&= ~DSPFW_HPLL_CURSOR_MASK
;
1058 reg
|= (wm
& 0x3f) << DSPFW_HPLL_CURSOR_SHIFT
;
1059 I915_WRITE(DSPFW3
, reg
);
1060 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg
);
1064 I915_READ(DSPFW3
) | PINEVIEW_SELF_REFRESH_EN
);
1065 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1067 pineview_disable_cxsr(dev
);
1068 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1072 static bool g4x_compute_wm0(struct drm_device
*dev
,
1074 const struct intel_watermark_params
*display
,
1075 int display_latency_ns
,
1076 const struct intel_watermark_params
*cursor
,
1077 int cursor_latency_ns
,
1081 struct drm_crtc
*crtc
;
1082 int htotal
, hdisplay
, clock
, pixel_size
;
1083 int line_time_us
, line_count
;
1084 int entries
, tlb_miss
;
1086 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1087 if (crtc
->fb
== NULL
|| !crtc
->enabled
) {
1088 *cursor_wm
= cursor
->guard_size
;
1089 *plane_wm
= display
->guard_size
;
1093 htotal
= crtc
->mode
.htotal
;
1094 hdisplay
= crtc
->mode
.hdisplay
;
1095 clock
= crtc
->mode
.clock
;
1096 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1098 /* Use the small buffer method to calculate plane watermark */
1099 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
1100 tlb_miss
= display
->fifo_size
*display
->cacheline_size
- hdisplay
* 8;
1102 entries
+= tlb_miss
;
1103 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
1104 *plane_wm
= entries
+ display
->guard_size
;
1105 if (*plane_wm
> (int)display
->max_wm
)
1106 *plane_wm
= display
->max_wm
;
1108 /* Use the large buffer method to calculate cursor watermark */
1109 line_time_us
= ((htotal
* 1000) / clock
);
1110 line_count
= (cursor_latency_ns
/ line_time_us
+ 1000) / 1000;
1111 entries
= line_count
* 64 * pixel_size
;
1112 tlb_miss
= cursor
->fifo_size
*cursor
->cacheline_size
- hdisplay
* 8;
1114 entries
+= tlb_miss
;
1115 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1116 *cursor_wm
= entries
+ cursor
->guard_size
;
1117 if (*cursor_wm
> (int)cursor
->max_wm
)
1118 *cursor_wm
= (int)cursor
->max_wm
;
1124 * Check the wm result.
1126 * If any calculated watermark values is larger than the maximum value that
1127 * can be programmed into the associated watermark register, that watermark
1130 static bool g4x_check_srwm(struct drm_device
*dev
,
1131 int display_wm
, int cursor_wm
,
1132 const struct intel_watermark_params
*display
,
1133 const struct intel_watermark_params
*cursor
)
1135 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1136 display_wm
, cursor_wm
);
1138 if (display_wm
> display
->max_wm
) {
1139 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1140 display_wm
, display
->max_wm
);
1144 if (cursor_wm
> cursor
->max_wm
) {
1145 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1146 cursor_wm
, cursor
->max_wm
);
1150 if (!(display_wm
|| cursor_wm
)) {
1151 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1158 static bool g4x_compute_srwm(struct drm_device
*dev
,
1161 const struct intel_watermark_params
*display
,
1162 const struct intel_watermark_params
*cursor
,
1163 int *display_wm
, int *cursor_wm
)
1165 struct drm_crtc
*crtc
;
1166 int hdisplay
, htotal
, pixel_size
, clock
;
1167 unsigned long line_time_us
;
1168 int line_count
, line_size
;
1173 *display_wm
= *cursor_wm
= 0;
1177 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1178 hdisplay
= crtc
->mode
.hdisplay
;
1179 htotal
= crtc
->mode
.htotal
;
1180 clock
= crtc
->mode
.clock
;
1181 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1183 line_time_us
= (htotal
* 1000) / clock
;
1184 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1185 line_size
= hdisplay
* pixel_size
;
1187 /* Use the minimum of the small and large buffer method for primary */
1188 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1189 large
= line_count
* line_size
;
1191 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1192 *display_wm
= entries
+ display
->guard_size
;
1194 /* calculate the self-refresh watermark for display cursor */
1195 entries
= line_count
* pixel_size
* 64;
1196 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1197 *cursor_wm
= entries
+ cursor
->guard_size
;
1199 return g4x_check_srwm(dev
,
1200 *display_wm
, *cursor_wm
,
1204 static bool vlv_compute_drain_latency(struct drm_device
*dev
,
1206 int *plane_prec_mult
,
1208 int *cursor_prec_mult
,
1211 struct drm_crtc
*crtc
;
1212 int clock
, pixel_size
;
1215 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1216 if (crtc
->fb
== NULL
|| !crtc
->enabled
)
1219 clock
= crtc
->mode
.clock
; /* VESA DOT Clock */
1220 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8; /* BPP */
1222 entries
= (clock
/ 1000) * pixel_size
;
1223 *plane_prec_mult
= (entries
> 256) ?
1224 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1225 *plane_dl
= (64 * (*plane_prec_mult
) * 4) / ((clock
/ 1000) *
1228 entries
= (clock
/ 1000) * 4; /* BPP is always 4 for cursor */
1229 *cursor_prec_mult
= (entries
> 256) ?
1230 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1231 *cursor_dl
= (64 * (*cursor_prec_mult
) * 4) / ((clock
/ 1000) * 4);
1237 * Update drain latency registers of memory arbiter
1239 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1240 * to be programmed. Each plane has a drain latency multiplier and a drain
1244 static void vlv_update_drain_latency(struct drm_device
*dev
)
1246 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1247 int planea_prec
, planea_dl
, planeb_prec
, planeb_dl
;
1248 int cursora_prec
, cursora_dl
, cursorb_prec
, cursorb_dl
;
1249 int plane_prec_mult
, cursor_prec_mult
; /* Precision multiplier is
1252 /* For plane A, Cursor A */
1253 if (vlv_compute_drain_latency(dev
, 0, &plane_prec_mult
, &planea_dl
,
1254 &cursor_prec_mult
, &cursora_dl
)) {
1255 cursora_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1256 DDL_CURSORA_PRECISION_32
: DDL_CURSORA_PRECISION_16
;
1257 planea_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1258 DDL_PLANEA_PRECISION_32
: DDL_PLANEA_PRECISION_16
;
1260 I915_WRITE(VLV_DDL1
, cursora_prec
|
1261 (cursora_dl
<< DDL_CURSORA_SHIFT
) |
1262 planea_prec
| planea_dl
);
1265 /* For plane B, Cursor B */
1266 if (vlv_compute_drain_latency(dev
, 1, &plane_prec_mult
, &planeb_dl
,
1267 &cursor_prec_mult
, &cursorb_dl
)) {
1268 cursorb_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1269 DDL_CURSORB_PRECISION_32
: DDL_CURSORB_PRECISION_16
;
1270 planeb_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1271 DDL_PLANEB_PRECISION_32
: DDL_PLANEB_PRECISION_16
;
1273 I915_WRITE(VLV_DDL2
, cursorb_prec
|
1274 (cursorb_dl
<< DDL_CURSORB_SHIFT
) |
1275 planeb_prec
| planeb_dl
);
1279 #define single_plane_enabled(mask) is_power_of_2(mask)
1281 static void valleyview_update_wm(struct drm_device
*dev
)
1283 static const int sr_latency_ns
= 12000;
1284 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1285 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1286 int plane_sr
, cursor_sr
;
1287 unsigned int enabled
= 0;
1289 vlv_update_drain_latency(dev
);
1291 if (g4x_compute_wm0(dev
, 0,
1292 &valleyview_wm_info
, latency_ns
,
1293 &valleyview_cursor_wm_info
, latency_ns
,
1294 &planea_wm
, &cursora_wm
))
1297 if (g4x_compute_wm0(dev
, 1,
1298 &valleyview_wm_info
, latency_ns
,
1299 &valleyview_cursor_wm_info
, latency_ns
,
1300 &planeb_wm
, &cursorb_wm
))
1303 plane_sr
= cursor_sr
= 0;
1304 if (single_plane_enabled(enabled
) &&
1305 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1307 &valleyview_wm_info
,
1308 &valleyview_cursor_wm_info
,
1309 &plane_sr
, &cursor_sr
))
1310 I915_WRITE(FW_BLC_SELF_VLV
, FW_CSPWRDWNEN
);
1312 I915_WRITE(FW_BLC_SELF_VLV
,
1313 I915_READ(FW_BLC_SELF_VLV
) & ~FW_CSPWRDWNEN
);
1315 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1316 planea_wm
, cursora_wm
,
1317 planeb_wm
, cursorb_wm
,
1318 plane_sr
, cursor_sr
);
1321 (plane_sr
<< DSPFW_SR_SHIFT
) |
1322 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1323 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1326 (I915_READ(DSPFW2
) & DSPFW_CURSORA_MASK
) |
1327 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1329 (I915_READ(DSPFW3
) | (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
)));
1332 static void g4x_update_wm(struct drm_device
*dev
)
1334 static const int sr_latency_ns
= 12000;
1335 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1336 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1337 int plane_sr
, cursor_sr
;
1338 unsigned int enabled
= 0;
1340 if (g4x_compute_wm0(dev
, 0,
1341 &g4x_wm_info
, latency_ns
,
1342 &g4x_cursor_wm_info
, latency_ns
,
1343 &planea_wm
, &cursora_wm
))
1346 if (g4x_compute_wm0(dev
, 1,
1347 &g4x_wm_info
, latency_ns
,
1348 &g4x_cursor_wm_info
, latency_ns
,
1349 &planeb_wm
, &cursorb_wm
))
1352 plane_sr
= cursor_sr
= 0;
1353 if (single_plane_enabled(enabled
) &&
1354 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1357 &g4x_cursor_wm_info
,
1358 &plane_sr
, &cursor_sr
))
1359 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1361 I915_WRITE(FW_BLC_SELF
,
1362 I915_READ(FW_BLC_SELF
) & ~FW_BLC_SELF_EN
);
1364 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1365 planea_wm
, cursora_wm
,
1366 planeb_wm
, cursorb_wm
,
1367 plane_sr
, cursor_sr
);
1370 (plane_sr
<< DSPFW_SR_SHIFT
) |
1371 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1372 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1375 (I915_READ(DSPFW2
) & DSPFW_CURSORA_MASK
) |
1376 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1377 /* HPLL off in SR has some issues on G4x... disable it */
1379 (I915_READ(DSPFW3
) & ~DSPFW_HPLL_SR_EN
) |
1380 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1383 static void i965_update_wm(struct drm_device
*dev
)
1385 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1386 struct drm_crtc
*crtc
;
1390 /* Calc sr entries for one plane configs */
1391 crtc
= single_enabled_crtc(dev
);
1393 /* self-refresh has much higher latency */
1394 static const int sr_latency_ns
= 12000;
1395 int clock
= crtc
->mode
.clock
;
1396 int htotal
= crtc
->mode
.htotal
;
1397 int hdisplay
= crtc
->mode
.hdisplay
;
1398 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1399 unsigned long line_time_us
;
1402 line_time_us
= ((htotal
* 1000) / clock
);
1404 /* Use ns/us then divide to preserve precision */
1405 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1406 pixel_size
* hdisplay
;
1407 entries
= DIV_ROUND_UP(entries
, I915_FIFO_LINE_SIZE
);
1408 srwm
= I965_FIFO_SIZE
- entries
;
1412 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1415 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1417 entries
= DIV_ROUND_UP(entries
,
1418 i965_cursor_wm_info
.cacheline_size
);
1419 cursor_sr
= i965_cursor_wm_info
.fifo_size
-
1420 (entries
+ i965_cursor_wm_info
.guard_size
);
1422 if (cursor_sr
> i965_cursor_wm_info
.max_wm
)
1423 cursor_sr
= i965_cursor_wm_info
.max_wm
;
1425 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1426 "cursor %d\n", srwm
, cursor_sr
);
1428 if (IS_CRESTLINE(dev
))
1429 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1431 /* Turn off self refresh if both pipes are enabled */
1432 if (IS_CRESTLINE(dev
))
1433 I915_WRITE(FW_BLC_SELF
, I915_READ(FW_BLC_SELF
)
1437 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1440 /* 965 has limitations... */
1441 I915_WRITE(DSPFW1
, (srwm
<< DSPFW_SR_SHIFT
) |
1442 (8 << 16) | (8 << 8) | (8 << 0));
1443 I915_WRITE(DSPFW2
, (8 << 8) | (8 << 0));
1444 /* update cursor SR watermark */
1445 I915_WRITE(DSPFW3
, (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1448 static void i9xx_update_wm(struct drm_device
*dev
)
1450 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1451 const struct intel_watermark_params
*wm_info
;
1456 int planea_wm
, planeb_wm
;
1457 struct drm_crtc
*crtc
, *enabled
= NULL
;
1460 wm_info
= &i945_wm_info
;
1461 else if (!IS_GEN2(dev
))
1462 wm_info
= &i915_wm_info
;
1464 wm_info
= &i855_wm_info
;
1466 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 0);
1467 crtc
= intel_get_crtc_for_plane(dev
, 0);
1468 if (crtc
->enabled
&& crtc
->fb
) {
1469 planea_wm
= intel_calculate_wm(crtc
->mode
.clock
,
1471 crtc
->fb
->bits_per_pixel
/ 8,
1475 planea_wm
= fifo_size
- wm_info
->guard_size
;
1477 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 1);
1478 crtc
= intel_get_crtc_for_plane(dev
, 1);
1479 if (crtc
->enabled
&& crtc
->fb
) {
1480 planeb_wm
= intel_calculate_wm(crtc
->mode
.clock
,
1482 crtc
->fb
->bits_per_pixel
/ 8,
1484 if (enabled
== NULL
)
1489 planeb_wm
= fifo_size
- wm_info
->guard_size
;
1491 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm
, planeb_wm
);
1494 * Overlay gets an aggressive default since video jitter is bad.
1498 /* Play safe and disable self-refresh before adjusting watermarks. */
1499 if (IS_I945G(dev
) || IS_I945GM(dev
))
1500 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN_MASK
| 0);
1501 else if (IS_I915GM(dev
))
1502 I915_WRITE(INSTPM
, I915_READ(INSTPM
) & ~INSTPM_SELF_EN
);
1504 /* Calc sr entries for one plane configs */
1505 if (HAS_FW_BLC(dev
) && enabled
) {
1506 /* self-refresh has much higher latency */
1507 static const int sr_latency_ns
= 6000;
1508 int clock
= enabled
->mode
.clock
;
1509 int htotal
= enabled
->mode
.htotal
;
1510 int hdisplay
= enabled
->mode
.hdisplay
;
1511 int pixel_size
= enabled
->fb
->bits_per_pixel
/ 8;
1512 unsigned long line_time_us
;
1515 line_time_us
= (htotal
* 1000) / clock
;
1517 /* Use ns/us then divide to preserve precision */
1518 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1519 pixel_size
* hdisplay
;
1520 entries
= DIV_ROUND_UP(entries
, wm_info
->cacheline_size
);
1521 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries
);
1522 srwm
= wm_info
->fifo_size
- entries
;
1526 if (IS_I945G(dev
) || IS_I945GM(dev
))
1527 I915_WRITE(FW_BLC_SELF
,
1528 FW_BLC_SELF_FIFO_MASK
| (srwm
& 0xff));
1529 else if (IS_I915GM(dev
))
1530 I915_WRITE(FW_BLC_SELF
, srwm
& 0x3f);
1533 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1534 planea_wm
, planeb_wm
, cwm
, srwm
);
1536 fwater_lo
= ((planeb_wm
& 0x3f) << 16) | (planea_wm
& 0x3f);
1537 fwater_hi
= (cwm
& 0x1f);
1539 /* Set request length to 8 cachelines per fetch */
1540 fwater_lo
= fwater_lo
| (1 << 24) | (1 << 8);
1541 fwater_hi
= fwater_hi
| (1 << 8);
1543 I915_WRITE(FW_BLC
, fwater_lo
);
1544 I915_WRITE(FW_BLC2
, fwater_hi
);
1546 if (HAS_FW_BLC(dev
)) {
1548 if (IS_I945G(dev
) || IS_I945GM(dev
))
1549 I915_WRITE(FW_BLC_SELF
,
1550 FW_BLC_SELF_EN_MASK
| FW_BLC_SELF_EN
);
1551 else if (IS_I915GM(dev
))
1552 I915_WRITE(INSTPM
, I915_READ(INSTPM
) | INSTPM_SELF_EN
);
1553 DRM_DEBUG_KMS("memory self refresh enabled\n");
1555 DRM_DEBUG_KMS("memory self refresh disabled\n");
1559 static void i830_update_wm(struct drm_device
*dev
)
1561 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1562 struct drm_crtc
*crtc
;
1566 crtc
= single_enabled_crtc(dev
);
1570 planea_wm
= intel_calculate_wm(crtc
->mode
.clock
, &i830_wm_info
,
1571 dev_priv
->display
.get_fifo_size(dev
, 0),
1572 crtc
->fb
->bits_per_pixel
/ 8,
1574 fwater_lo
= I915_READ(FW_BLC
) & ~0xfff;
1575 fwater_lo
|= (3<<8) | planea_wm
;
1577 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm
);
1579 I915_WRITE(FW_BLC
, fwater_lo
);
1582 #define ILK_LP0_PLANE_LATENCY 700
1583 #define ILK_LP0_CURSOR_LATENCY 1300
1586 * Check the wm result.
1588 * If any calculated watermark values is larger than the maximum value that
1589 * can be programmed into the associated watermark register, that watermark
1592 static bool ironlake_check_srwm(struct drm_device
*dev
, int level
,
1593 int fbc_wm
, int display_wm
, int cursor_wm
,
1594 const struct intel_watermark_params
*display
,
1595 const struct intel_watermark_params
*cursor
)
1597 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1599 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1600 " cursor %d\n", level
, display_wm
, fbc_wm
, cursor_wm
);
1602 if (fbc_wm
> SNB_FBC_MAX_SRWM
) {
1603 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1604 fbc_wm
, SNB_FBC_MAX_SRWM
, level
);
1606 /* fbc has it's own way to disable FBC WM */
1607 I915_WRITE(DISP_ARB_CTL
,
1608 I915_READ(DISP_ARB_CTL
) | DISP_FBC_WM_DIS
);
1612 if (display_wm
> display
->max_wm
) {
1613 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1614 display_wm
, SNB_DISPLAY_MAX_SRWM
, level
);
1618 if (cursor_wm
> cursor
->max_wm
) {
1619 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1620 cursor_wm
, SNB_CURSOR_MAX_SRWM
, level
);
1624 if (!(fbc_wm
|| display_wm
|| cursor_wm
)) {
1625 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level
, level
);
1633 * Compute watermark values of WM[1-3],
1635 static bool ironlake_compute_srwm(struct drm_device
*dev
, int level
, int plane
,
1637 const struct intel_watermark_params
*display
,
1638 const struct intel_watermark_params
*cursor
,
1639 int *fbc_wm
, int *display_wm
, int *cursor_wm
)
1641 struct drm_crtc
*crtc
;
1642 unsigned long line_time_us
;
1643 int hdisplay
, htotal
, pixel_size
, clock
;
1644 int line_count
, line_size
;
1649 *fbc_wm
= *display_wm
= *cursor_wm
= 0;
1653 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1654 hdisplay
= crtc
->mode
.hdisplay
;
1655 htotal
= crtc
->mode
.htotal
;
1656 clock
= crtc
->mode
.clock
;
1657 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1659 line_time_us
= (htotal
* 1000) / clock
;
1660 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1661 line_size
= hdisplay
* pixel_size
;
1663 /* Use the minimum of the small and large buffer method for primary */
1664 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1665 large
= line_count
* line_size
;
1667 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1668 *display_wm
= entries
+ display
->guard_size
;
1672 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1674 *fbc_wm
= DIV_ROUND_UP(*display_wm
* 64, line_size
) + 2;
1676 /* calculate the self-refresh watermark for display cursor */
1677 entries
= line_count
* pixel_size
* 64;
1678 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1679 *cursor_wm
= entries
+ cursor
->guard_size
;
1681 return ironlake_check_srwm(dev
, level
,
1682 *fbc_wm
, *display_wm
, *cursor_wm
,
1686 static void ironlake_update_wm(struct drm_device
*dev
)
1688 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1689 int fbc_wm
, plane_wm
, cursor_wm
;
1690 unsigned int enabled
;
1693 if (g4x_compute_wm0(dev
, 0,
1694 &ironlake_display_wm_info
,
1695 ILK_LP0_PLANE_LATENCY
,
1696 &ironlake_cursor_wm_info
,
1697 ILK_LP0_CURSOR_LATENCY
,
1698 &plane_wm
, &cursor_wm
)) {
1699 I915_WRITE(WM0_PIPEA_ILK
,
1700 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1701 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1702 " plane %d, " "cursor: %d\n",
1703 plane_wm
, cursor_wm
);
1707 if (g4x_compute_wm0(dev
, 1,
1708 &ironlake_display_wm_info
,
1709 ILK_LP0_PLANE_LATENCY
,
1710 &ironlake_cursor_wm_info
,
1711 ILK_LP0_CURSOR_LATENCY
,
1712 &plane_wm
, &cursor_wm
)) {
1713 I915_WRITE(WM0_PIPEB_ILK
,
1714 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1715 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1716 " plane %d, cursor: %d\n",
1717 plane_wm
, cursor_wm
);
1722 * Calculate and update the self-refresh watermark only when one
1723 * display plane is used.
1725 I915_WRITE(WM3_LP_ILK
, 0);
1726 I915_WRITE(WM2_LP_ILK
, 0);
1727 I915_WRITE(WM1_LP_ILK
, 0);
1729 if (!single_plane_enabled(enabled
))
1731 enabled
= ffs(enabled
) - 1;
1734 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1735 ILK_READ_WM1_LATENCY() * 500,
1736 &ironlake_display_srwm_info
,
1737 &ironlake_cursor_srwm_info
,
1738 &fbc_wm
, &plane_wm
, &cursor_wm
))
1741 I915_WRITE(WM1_LP_ILK
,
1743 (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT
) |
1744 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1745 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1749 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1750 ILK_READ_WM2_LATENCY() * 500,
1751 &ironlake_display_srwm_info
,
1752 &ironlake_cursor_srwm_info
,
1753 &fbc_wm
, &plane_wm
, &cursor_wm
))
1756 I915_WRITE(WM2_LP_ILK
,
1758 (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT
) |
1759 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1760 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1764 * WM3 is unsupported on ILK, probably because we don't have latency
1765 * data for that power state
1769 static void sandybridge_update_wm(struct drm_device
*dev
)
1771 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1772 int latency
= SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
1774 int fbc_wm
, plane_wm
, cursor_wm
;
1775 unsigned int enabled
;
1778 if (g4x_compute_wm0(dev
, 0,
1779 &sandybridge_display_wm_info
, latency
,
1780 &sandybridge_cursor_wm_info
, latency
,
1781 &plane_wm
, &cursor_wm
)) {
1782 val
= I915_READ(WM0_PIPEA_ILK
);
1783 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1784 I915_WRITE(WM0_PIPEA_ILK
, val
|
1785 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1786 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1787 " plane %d, " "cursor: %d\n",
1788 plane_wm
, cursor_wm
);
1792 if (g4x_compute_wm0(dev
, 1,
1793 &sandybridge_display_wm_info
, latency
,
1794 &sandybridge_cursor_wm_info
, latency
,
1795 &plane_wm
, &cursor_wm
)) {
1796 val
= I915_READ(WM0_PIPEB_ILK
);
1797 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1798 I915_WRITE(WM0_PIPEB_ILK
, val
|
1799 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1800 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1801 " plane %d, cursor: %d\n",
1802 plane_wm
, cursor_wm
);
1806 /* IVB has 3 pipes */
1807 if (IS_IVYBRIDGE(dev
) &&
1808 g4x_compute_wm0(dev
, 2,
1809 &sandybridge_display_wm_info
, latency
,
1810 &sandybridge_cursor_wm_info
, latency
,
1811 &plane_wm
, &cursor_wm
)) {
1812 val
= I915_READ(WM0_PIPEC_IVB
);
1813 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1814 I915_WRITE(WM0_PIPEC_IVB
, val
|
1815 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1816 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
1817 " plane %d, cursor: %d\n",
1818 plane_wm
, cursor_wm
);
1823 * Calculate and update the self-refresh watermark only when one
1824 * display plane is used.
1826 * SNB support 3 levels of watermark.
1828 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1829 * and disabled in the descending order
1832 I915_WRITE(WM3_LP_ILK
, 0);
1833 I915_WRITE(WM2_LP_ILK
, 0);
1834 I915_WRITE(WM1_LP_ILK
, 0);
1836 if (!single_plane_enabled(enabled
) ||
1837 dev_priv
->sprite_scaling_enabled
)
1839 enabled
= ffs(enabled
) - 1;
1842 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1843 SNB_READ_WM1_LATENCY() * 500,
1844 &sandybridge_display_srwm_info
,
1845 &sandybridge_cursor_srwm_info
,
1846 &fbc_wm
, &plane_wm
, &cursor_wm
))
1849 I915_WRITE(WM1_LP_ILK
,
1851 (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT
) |
1852 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1853 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1857 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1858 SNB_READ_WM2_LATENCY() * 500,
1859 &sandybridge_display_srwm_info
,
1860 &sandybridge_cursor_srwm_info
,
1861 &fbc_wm
, &plane_wm
, &cursor_wm
))
1864 I915_WRITE(WM2_LP_ILK
,
1866 (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT
) |
1867 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1868 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1872 if (!ironlake_compute_srwm(dev
, 3, enabled
,
1873 SNB_READ_WM3_LATENCY() * 500,
1874 &sandybridge_display_srwm_info
,
1875 &sandybridge_cursor_srwm_info
,
1876 &fbc_wm
, &plane_wm
, &cursor_wm
))
1879 I915_WRITE(WM3_LP_ILK
,
1881 (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT
) |
1882 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1883 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1888 sandybridge_compute_sprite_wm(struct drm_device
*dev
, int plane
,
1889 uint32_t sprite_width
, int pixel_size
,
1890 const struct intel_watermark_params
*display
,
1891 int display_latency_ns
, int *sprite_wm
)
1893 struct drm_crtc
*crtc
;
1895 int entries
, tlb_miss
;
1897 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1898 if (crtc
->fb
== NULL
|| !crtc
->enabled
) {
1899 *sprite_wm
= display
->guard_size
;
1903 clock
= crtc
->mode
.clock
;
1905 /* Use the small buffer method to calculate the sprite watermark */
1906 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
1907 tlb_miss
= display
->fifo_size
*display
->cacheline_size
-
1910 entries
+= tlb_miss
;
1911 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
1912 *sprite_wm
= entries
+ display
->guard_size
;
1913 if (*sprite_wm
> (int)display
->max_wm
)
1914 *sprite_wm
= display
->max_wm
;
1920 sandybridge_compute_sprite_srwm(struct drm_device
*dev
, int plane
,
1921 uint32_t sprite_width
, int pixel_size
,
1922 const struct intel_watermark_params
*display
,
1923 int latency_ns
, int *sprite_wm
)
1925 struct drm_crtc
*crtc
;
1926 unsigned long line_time_us
;
1928 int line_count
, line_size
;
1937 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1938 clock
= crtc
->mode
.clock
;
1944 line_time_us
= (sprite_width
* 1000) / clock
;
1945 if (!line_time_us
) {
1950 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1951 line_size
= sprite_width
* pixel_size
;
1953 /* Use the minimum of the small and large buffer method for primary */
1954 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1955 large
= line_count
* line_size
;
1957 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1958 *sprite_wm
= entries
+ display
->guard_size
;
1960 return *sprite_wm
> 0x3ff ? false : true;
1963 static void sandybridge_update_sprite_wm(struct drm_device
*dev
, int pipe
,
1964 uint32_t sprite_width
, int pixel_size
)
1966 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1967 int latency
= SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
1974 reg
= WM0_PIPEA_ILK
;
1977 reg
= WM0_PIPEB_ILK
;
1980 reg
= WM0_PIPEC_IVB
;
1983 return; /* bad pipe */
1986 ret
= sandybridge_compute_sprite_wm(dev
, pipe
, sprite_width
, pixel_size
,
1987 &sandybridge_display_wm_info
,
1988 latency
, &sprite_wm
);
1990 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %d\n",
1995 val
= I915_READ(reg
);
1996 val
&= ~WM0_PIPE_SPRITE_MASK
;
1997 I915_WRITE(reg
, val
| (sprite_wm
<< WM0_PIPE_SPRITE_SHIFT
));
1998 DRM_DEBUG_KMS("sprite watermarks For pipe %d - %d\n", pipe
, sprite_wm
);
2001 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
2003 &sandybridge_display_srwm_info
,
2004 SNB_READ_WM1_LATENCY() * 500,
2007 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %d\n",
2011 I915_WRITE(WM1S_LP_ILK
, sprite_wm
);
2013 /* Only IVB has two more LP watermarks for sprite */
2014 if (!IS_IVYBRIDGE(dev
))
2017 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
2019 &sandybridge_display_srwm_info
,
2020 SNB_READ_WM2_LATENCY() * 500,
2023 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %d\n",
2027 I915_WRITE(WM2S_LP_IVB
, sprite_wm
);
2029 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
2031 &sandybridge_display_srwm_info
,
2032 SNB_READ_WM3_LATENCY() * 500,
2035 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %d\n",
2039 I915_WRITE(WM3S_LP_IVB
, sprite_wm
);
2043 * intel_update_watermarks - update FIFO watermark values based on current modes
2045 * Calculate watermark values for the various WM regs based on current mode
2046 * and plane configuration.
2048 * There are several cases to deal with here:
2049 * - normal (i.e. non-self-refresh)
2050 * - self-refresh (SR) mode
2051 * - lines are large relative to FIFO size (buffer can hold up to 2)
2052 * - lines are small relative to FIFO size (buffer can hold more than 2
2053 * lines), so need to account for TLB latency
2055 * The normal calculation is:
2056 * watermark = dotclock * bytes per pixel * latency
2057 * where latency is platform & configuration dependent (we assume pessimal
2060 * The SR calculation is:
2061 * watermark = (trunc(latency/line time)+1) * surface width *
2064 * line time = htotal / dotclock
2065 * surface width = hdisplay for normal plane and 64 for cursor
2066 * and latency is assumed to be high, as above.
2068 * The final value programmed to the register should always be rounded up,
2069 * and include an extra 2 entries to account for clock crossings.
2071 * We don't use the sprite, so we can ignore that. And on Crestline we have
2072 * to set the non-SR watermarks to 8.
2074 void intel_update_watermarks(struct drm_device
*dev
)
2076 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2078 if (dev_priv
->display
.update_wm
)
2079 dev_priv
->display
.update_wm(dev
);
2082 void intel_update_sprite_watermarks(struct drm_device
*dev
, int pipe
,
2083 uint32_t sprite_width
, int pixel_size
)
2085 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2087 if (dev_priv
->display
.update_sprite_wm
)
2088 dev_priv
->display
.update_sprite_wm(dev
, pipe
, sprite_width
,
2092 static struct drm_i915_gem_object
*
2093 intel_alloc_context_page(struct drm_device
*dev
)
2095 struct drm_i915_gem_object
*ctx
;
2098 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
2100 ctx
= i915_gem_alloc_object(dev
, 4096);
2102 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
2106 ret
= i915_gem_object_pin(ctx
, 4096, true);
2108 DRM_ERROR("failed to pin power context: %d\n", ret
);
2112 ret
= i915_gem_object_set_to_gtt_domain(ctx
, 1);
2114 DRM_ERROR("failed to set-domain on power context: %d\n", ret
);
2121 i915_gem_object_unpin(ctx
);
2123 drm_gem_object_unreference(&ctx
->base
);
2124 mutex_unlock(&dev
->struct_mutex
);
2128 bool ironlake_set_drps(struct drm_device
*dev
, u8 val
)
2130 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2133 rgvswctl
= I915_READ16(MEMSWCTL
);
2134 if (rgvswctl
& MEMCTL_CMD_STS
) {
2135 DRM_DEBUG("gpu busy, RCS change rejected\n");
2136 return false; /* still busy with another command */
2139 rgvswctl
= (MEMCTL_CMD_CHFREQ
<< MEMCTL_CMD_SHIFT
) |
2140 (val
<< MEMCTL_FREQ_SHIFT
) | MEMCTL_SFCAVM
;
2141 I915_WRITE16(MEMSWCTL
, rgvswctl
);
2142 POSTING_READ16(MEMSWCTL
);
2144 rgvswctl
|= MEMCTL_CMD_STS
;
2145 I915_WRITE16(MEMSWCTL
, rgvswctl
);
2150 void ironlake_enable_drps(struct drm_device
*dev
)
2152 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2153 u32 rgvmodectl
= I915_READ(MEMMODECTL
);
2154 u8 fmax
, fmin
, fstart
, vstart
;
2156 /* Enable temp reporting */
2157 I915_WRITE16(PMMISC
, I915_READ(PMMISC
) | MCPPCE_EN
);
2158 I915_WRITE16(TSC1
, I915_READ(TSC1
) | TSE
);
2160 /* 100ms RC evaluation intervals */
2161 I915_WRITE(RCUPEI
, 100000);
2162 I915_WRITE(RCDNEI
, 100000);
2164 /* Set max/min thresholds to 90ms and 80ms respectively */
2165 I915_WRITE(RCBMAXAVG
, 90000);
2166 I915_WRITE(RCBMINAVG
, 80000);
2168 I915_WRITE(MEMIHYST
, 1);
2170 /* Set up min, max, and cur for interrupt handling */
2171 fmax
= (rgvmodectl
& MEMMODE_FMAX_MASK
) >> MEMMODE_FMAX_SHIFT
;
2172 fmin
= (rgvmodectl
& MEMMODE_FMIN_MASK
);
2173 fstart
= (rgvmodectl
& MEMMODE_FSTART_MASK
) >>
2174 MEMMODE_FSTART_SHIFT
;
2176 vstart
= (I915_READ(PXVFREQ_BASE
+ (fstart
* 4)) & PXVFREQ_PX_MASK
) >>
2179 dev_priv
->fmax
= fmax
; /* IPS callback will increase this */
2180 dev_priv
->fstart
= fstart
;
2182 dev_priv
->max_delay
= fstart
;
2183 dev_priv
->min_delay
= fmin
;
2184 dev_priv
->cur_delay
= fstart
;
2186 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
2187 fmax
, fmin
, fstart
);
2189 I915_WRITE(MEMINTREN
, MEMINT_CX_SUPR_EN
| MEMINT_EVAL_CHG_EN
);
2192 * Interrupts will be enabled in ironlake_irq_postinstall
2195 I915_WRITE(VIDSTART
, vstart
);
2196 POSTING_READ(VIDSTART
);
2198 rgvmodectl
|= MEMMODE_SWMODE_EN
;
2199 I915_WRITE(MEMMODECTL
, rgvmodectl
);
2201 if (wait_for((I915_READ(MEMSWCTL
) & MEMCTL_CMD_STS
) == 0, 10))
2202 DRM_ERROR("stuck trying to change perf mode\n");
2205 ironlake_set_drps(dev
, fstart
);
2207 dev_priv
->last_count1
= I915_READ(0x112e4) + I915_READ(0x112e8) +
2209 dev_priv
->last_time1
= jiffies_to_msecs(jiffies
);
2210 dev_priv
->last_count2
= I915_READ(0x112f4);
2211 getrawmonotonic(&dev_priv
->last_time2
);
2214 void ironlake_disable_drps(struct drm_device
*dev
)
2216 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2217 u16 rgvswctl
= I915_READ16(MEMSWCTL
);
2219 /* Ack interrupts, disable EFC interrupt */
2220 I915_WRITE(MEMINTREN
, I915_READ(MEMINTREN
) & ~MEMINT_EVAL_CHG_EN
);
2221 I915_WRITE(MEMINTRSTS
, MEMINT_EVAL_CHG
);
2222 I915_WRITE(DEIER
, I915_READ(DEIER
) & ~DE_PCU_EVENT
);
2223 I915_WRITE(DEIIR
, DE_PCU_EVENT
);
2224 I915_WRITE(DEIMR
, I915_READ(DEIMR
) | DE_PCU_EVENT
);
2226 /* Go back to the starting frequency */
2227 ironlake_set_drps(dev
, dev_priv
->fstart
);
2229 rgvswctl
|= MEMCTL_CMD_STS
;
2230 I915_WRITE(MEMSWCTL
, rgvswctl
);
2235 void gen6_set_rps(struct drm_device
*dev
, u8 val
)
2237 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2240 swreq
= (val
& 0x3ff) << 25;
2241 I915_WRITE(GEN6_RPNSWREQ
, swreq
);
2244 void gen6_disable_rps(struct drm_device
*dev
)
2246 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2248 I915_WRITE(GEN6_RPNSWREQ
, 1 << 31);
2249 I915_WRITE(GEN6_PMINTRMSK
, 0xffffffff);
2250 I915_WRITE(GEN6_PMIER
, 0);
2251 /* Complete PM interrupt masking here doesn't race with the rps work
2252 * item again unmasking PM interrupts because that is using a different
2253 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
2254 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
2256 spin_lock_irq(&dev_priv
->rps_lock
);
2257 dev_priv
->pm_iir
= 0;
2258 spin_unlock_irq(&dev_priv
->rps_lock
);
2260 I915_WRITE(GEN6_PMIIR
, I915_READ(GEN6_PMIIR
));
2263 int intel_enable_rc6(const struct drm_device
*dev
)
2266 * Respect the kernel parameter if it is set
2268 if (i915_enable_rc6
>= 0)
2269 return i915_enable_rc6
;
2272 * Disable RC6 on Ironlake
2274 if (INTEL_INFO(dev
)->gen
== 5)
2277 /* Sorry Haswell, no RC6 for you for now. */
2278 if (IS_HASWELL(dev
))
2282 * Disable rc6 on Sandybridge
2284 if (INTEL_INFO(dev
)->gen
== 6) {
2285 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
2286 return INTEL_RC6_ENABLE
;
2288 DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n");
2289 return (INTEL_RC6_ENABLE
| INTEL_RC6p_ENABLE
);
2292 void gen6_enable_rps(struct drm_i915_private
*dev_priv
)
2294 u32 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
2295 u32 gt_perf_status
= I915_READ(GEN6_GT_PERF_STATUS
);
2296 u32 pcu_mbox
, rc6_mask
= 0;
2298 int cur_freq
, min_freq
, max_freq
;
2302 /* Here begins a magic sequence of register writes to enable
2303 * auto-downclocking.
2305 * Perhaps there might be some value in exposing these to
2308 I915_WRITE(GEN6_RC_STATE
, 0);
2309 mutex_lock(&dev_priv
->dev
->struct_mutex
);
2311 /* Clear the DBG now so we don't confuse earlier errors */
2312 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
2313 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg
);
2314 I915_WRITE(GTFIFODBG
, gtfifodbg
);
2317 gen6_gt_force_wake_get(dev_priv
);
2319 /* disable the counters and set deterministic thresholds */
2320 I915_WRITE(GEN6_RC_CONTROL
, 0);
2322 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT
, 1000 << 16);
2323 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16 | 30);
2324 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT
, 30);
2325 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
2326 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
2328 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
2329 I915_WRITE(RING_MAX_IDLE(dev_priv
->ring
[i
].mmio_base
), 10);
2331 I915_WRITE(GEN6_RC_SLEEP
, 0);
2332 I915_WRITE(GEN6_RC1e_THRESHOLD
, 1000);
2333 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000);
2334 I915_WRITE(GEN6_RC6p_THRESHOLD
, 100000);
2335 I915_WRITE(GEN6_RC6pp_THRESHOLD
, 64000); /* unused */
2337 rc6_mode
= intel_enable_rc6(dev_priv
->dev
);
2338 if (rc6_mode
& INTEL_RC6_ENABLE
)
2339 rc6_mask
|= GEN6_RC_CTL_RC6_ENABLE
;
2341 if (rc6_mode
& INTEL_RC6p_ENABLE
)
2342 rc6_mask
|= GEN6_RC_CTL_RC6p_ENABLE
;
2344 if (rc6_mode
& INTEL_RC6pp_ENABLE
)
2345 rc6_mask
|= GEN6_RC_CTL_RC6pp_ENABLE
;
2347 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
2348 (rc6_mode
& INTEL_RC6_ENABLE
) ? "on" : "off",
2349 (rc6_mode
& INTEL_RC6p_ENABLE
) ? "on" : "off",
2350 (rc6_mode
& INTEL_RC6pp_ENABLE
) ? "on" : "off");
2352 I915_WRITE(GEN6_RC_CONTROL
,
2354 GEN6_RC_CTL_EI_MODE(1) |
2355 GEN6_RC_CTL_HW_ENABLE
);
2357 I915_WRITE(GEN6_RPNSWREQ
,
2358 GEN6_FREQUENCY(10) |
2360 GEN6_AGGRESSIVE_TURBO
);
2361 I915_WRITE(GEN6_RC_VIDEO_FREQ
,
2362 GEN6_FREQUENCY(12));
2364 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 1000000);
2365 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
,
2368 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 10000);
2369 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 1000000);
2370 I915_WRITE(GEN6_RP_UP_EI
, 100000);
2371 I915_WRITE(GEN6_RP_DOWN_EI
, 5000000);
2372 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
2373 I915_WRITE(GEN6_RP_CONTROL
,
2374 GEN6_RP_MEDIA_TURBO
|
2375 GEN6_RP_MEDIA_HW_MODE
|
2376 GEN6_RP_MEDIA_IS_GFX
|
2378 GEN6_RP_UP_BUSY_AVG
|
2379 GEN6_RP_DOWN_IDLE_CONT
);
2381 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
2383 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
2385 I915_WRITE(GEN6_PCODE_DATA
, 0);
2386 I915_WRITE(GEN6_PCODE_MAILBOX
,
2388 GEN6_PCODE_WRITE_MIN_FREQ_TABLE
);
2389 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
2391 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
2393 min_freq
= (rp_state_cap
& 0xff0000) >> 16;
2394 max_freq
= rp_state_cap
& 0xff;
2395 cur_freq
= (gt_perf_status
& 0xff00) >> 8;
2397 /* Check for overclock support */
2398 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
2400 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
2401 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_READ_OC_PARAMS
);
2402 pcu_mbox
= I915_READ(GEN6_PCODE_DATA
);
2403 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
2405 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
2406 if (pcu_mbox
& (1<<31)) { /* OC supported */
2407 max_freq
= pcu_mbox
& 0xff;
2408 DRM_DEBUG_DRIVER("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox
* 50);
2411 /* In units of 100MHz */
2412 dev_priv
->max_delay
= max_freq
;
2413 dev_priv
->min_delay
= min_freq
;
2414 dev_priv
->cur_delay
= cur_freq
;
2416 /* requires MSI enabled */
2417 I915_WRITE(GEN6_PMIER
,
2418 GEN6_PM_MBOX_EVENT
|
2419 GEN6_PM_THERMAL_EVENT
|
2420 GEN6_PM_RP_DOWN_TIMEOUT
|
2421 GEN6_PM_RP_UP_THRESHOLD
|
2422 GEN6_PM_RP_DOWN_THRESHOLD
|
2423 GEN6_PM_RP_UP_EI_EXPIRED
|
2424 GEN6_PM_RP_DOWN_EI_EXPIRED
);
2425 spin_lock_irq(&dev_priv
->rps_lock
);
2426 WARN_ON(dev_priv
->pm_iir
!= 0);
2427 I915_WRITE(GEN6_PMIMR
, 0);
2428 spin_unlock_irq(&dev_priv
->rps_lock
);
2429 /* enable all PM interrupts */
2430 I915_WRITE(GEN6_PMINTRMSK
, 0);
2432 gen6_gt_force_wake_put(dev_priv
);
2433 mutex_unlock(&dev_priv
->dev
->struct_mutex
);
2436 void gen6_update_ring_freq(struct drm_i915_private
*dev_priv
)
2439 int gpu_freq
, ia_freq
, max_ia_freq
;
2440 int scaling_factor
= 180;
2442 max_ia_freq
= cpufreq_quick_get_max(0);
2444 * Default to measured freq if none found, PCU will ensure we don't go
2448 max_ia_freq
= tsc_khz
;
2450 /* Convert from kHz to MHz */
2451 max_ia_freq
/= 1000;
2453 mutex_lock(&dev_priv
->dev
->struct_mutex
);
2456 * For each potential GPU frequency, load a ring frequency we'd like
2457 * to use for memory access. We do this by specifying the IA frequency
2458 * the PCU should use as a reference to determine the ring frequency.
2460 for (gpu_freq
= dev_priv
->max_delay
; gpu_freq
>= dev_priv
->min_delay
;
2462 int diff
= dev_priv
->max_delay
- gpu_freq
;
2465 * For GPU frequencies less than 750MHz, just use the lowest
2468 if (gpu_freq
< min_freq
)
2471 ia_freq
= max_ia_freq
- ((diff
* scaling_factor
) / 2);
2472 ia_freq
= DIV_ROUND_CLOSEST(ia_freq
, 100);
2474 I915_WRITE(GEN6_PCODE_DATA
,
2475 (ia_freq
<< GEN6_PCODE_FREQ_IA_RATIO_SHIFT
) |
2477 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
|
2478 GEN6_PCODE_WRITE_MIN_FREQ_TABLE
);
2479 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) &
2480 GEN6_PCODE_READY
) == 0, 10)) {
2481 DRM_ERROR("pcode write of freq table timed out\n");
2486 mutex_unlock(&dev_priv
->dev
->struct_mutex
);
2489 static void ironlake_teardown_rc6(struct drm_device
*dev
)
2491 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2493 if (dev_priv
->renderctx
) {
2494 i915_gem_object_unpin(dev_priv
->renderctx
);
2495 drm_gem_object_unreference(&dev_priv
->renderctx
->base
);
2496 dev_priv
->renderctx
= NULL
;
2499 if (dev_priv
->pwrctx
) {
2500 i915_gem_object_unpin(dev_priv
->pwrctx
);
2501 drm_gem_object_unreference(&dev_priv
->pwrctx
->base
);
2502 dev_priv
->pwrctx
= NULL
;
2506 void ironlake_disable_rc6(struct drm_device
*dev
)
2508 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2510 if (I915_READ(PWRCTXA
)) {
2511 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
2512 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) | RCX_SW_EXIT
);
2513 wait_for(((I915_READ(RSTDBYCTL
) & RSX_STATUS_MASK
) == RSX_STATUS_ON
),
2516 I915_WRITE(PWRCTXA
, 0);
2517 POSTING_READ(PWRCTXA
);
2519 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
2520 POSTING_READ(RSTDBYCTL
);
2523 ironlake_teardown_rc6(dev
);
2526 static int ironlake_setup_rc6(struct drm_device
*dev
)
2528 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2530 if (dev_priv
->renderctx
== NULL
)
2531 dev_priv
->renderctx
= intel_alloc_context_page(dev
);
2532 if (!dev_priv
->renderctx
)
2535 if (dev_priv
->pwrctx
== NULL
)
2536 dev_priv
->pwrctx
= intel_alloc_context_page(dev
);
2537 if (!dev_priv
->pwrctx
) {
2538 ironlake_teardown_rc6(dev
);
2545 void ironlake_enable_rc6(struct drm_device
*dev
)
2547 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2548 struct intel_ring_buffer
*ring
= &dev_priv
->ring
[RCS
];
2551 /* rc6 disabled by default due to repeated reports of hanging during
2554 if (!intel_enable_rc6(dev
))
2557 mutex_lock(&dev
->struct_mutex
);
2558 ret
= ironlake_setup_rc6(dev
);
2560 mutex_unlock(&dev
->struct_mutex
);
2565 * GPU can automatically power down the render unit if given a page
2568 ret
= intel_ring_begin(ring
, 6);
2570 ironlake_teardown_rc6(dev
);
2571 mutex_unlock(&dev
->struct_mutex
);
2575 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
| MI_SUSPEND_FLUSH_EN
);
2576 intel_ring_emit(ring
, MI_SET_CONTEXT
);
2577 intel_ring_emit(ring
, dev_priv
->renderctx
->gtt_offset
|
2579 MI_SAVE_EXT_STATE_EN
|
2580 MI_RESTORE_EXT_STATE_EN
|
2581 MI_RESTORE_INHIBIT
);
2582 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
);
2583 intel_ring_emit(ring
, MI_NOOP
);
2584 intel_ring_emit(ring
, MI_FLUSH
);
2585 intel_ring_advance(ring
);
2588 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
2589 * does an implicit flush, combined with MI_FLUSH above, it should be
2590 * safe to assume that renderctx is valid
2592 ret
= intel_wait_ring_idle(ring
);
2594 DRM_ERROR("failed to enable ironlake power power savings\n");
2595 ironlake_teardown_rc6(dev
);
2596 mutex_unlock(&dev
->struct_mutex
);
2600 I915_WRITE(PWRCTXA
, dev_priv
->pwrctx
->gtt_offset
| PWRCTX_EN
);
2601 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
2602 mutex_unlock(&dev
->struct_mutex
);
2605 static unsigned long intel_pxfreq(u32 vidfreq
)
2608 int div
= (vidfreq
& 0x3f0000) >> 16;
2609 int post
= (vidfreq
& 0x3000) >> 12;
2610 int pre
= (vidfreq
& 0x7);
2615 freq
= ((div
* 133333) / ((1<<post
) * pre
));
2620 static const struct cparams
{
2626 { 1, 1333, 301, 28664 },
2627 { 1, 1066, 294, 24460 },
2628 { 1, 800, 294, 25192 },
2629 { 0, 1333, 276, 27605 },
2630 { 0, 1066, 276, 27605 },
2631 { 0, 800, 231, 23784 },
2634 unsigned long i915_chipset_val(struct drm_i915_private
*dev_priv
)
2636 u64 total_count
, diff
, ret
;
2637 u32 count1
, count2
, count3
, m
= 0, c
= 0;
2638 unsigned long now
= jiffies_to_msecs(jiffies
), diff1
;
2641 diff1
= now
- dev_priv
->last_time1
;
2643 /* Prevent division-by-zero if we are asking too fast.
2644 * Also, we don't get interesting results if we are polling
2645 * faster than once in 10ms, so just return the saved value
2649 return dev_priv
->chipset_power
;
2651 count1
= I915_READ(DMIEC
);
2652 count2
= I915_READ(DDREC
);
2653 count3
= I915_READ(CSIEC
);
2655 total_count
= count1
+ count2
+ count3
;
2657 /* FIXME: handle per-counter overflow */
2658 if (total_count
< dev_priv
->last_count1
) {
2659 diff
= ~0UL - dev_priv
->last_count1
;
2660 diff
+= total_count
;
2662 diff
= total_count
- dev_priv
->last_count1
;
2665 for (i
= 0; i
< ARRAY_SIZE(cparams
); i
++) {
2666 if (cparams
[i
].i
== dev_priv
->c_m
&&
2667 cparams
[i
].t
== dev_priv
->r_t
) {
2674 diff
= div_u64(diff
, diff1
);
2675 ret
= ((m
* diff
) + c
);
2676 ret
= div_u64(ret
, 10);
2678 dev_priv
->last_count1
= total_count
;
2679 dev_priv
->last_time1
= now
;
2681 dev_priv
->chipset_power
= ret
;
2686 unsigned long i915_mch_val(struct drm_i915_private
*dev_priv
)
2688 unsigned long m
, x
, b
;
2691 tsfs
= I915_READ(TSFS
);
2693 m
= ((tsfs
& TSFS_SLOPE_MASK
) >> TSFS_SLOPE_SHIFT
);
2694 x
= I915_READ8(TR1
);
2696 b
= tsfs
& TSFS_INTR_MASK
;
2698 return ((m
* x
) / 127) - b
;
2701 static u16
pvid_to_extvid(struct drm_i915_private
*dev_priv
, u8 pxvid
)
2703 static const struct v_table
{
2704 u16 vd
; /* in .1 mil */
2705 u16 vm
; /* in .1 mil */
2836 if (dev_priv
->info
->is_mobile
)
2837 return v_table
[pxvid
].vm
;
2839 return v_table
[pxvid
].vd
;
2842 void i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
2844 struct timespec now
, diff1
;
2846 unsigned long diffms
;
2849 if (dev_priv
->info
->gen
!= 5)
2852 getrawmonotonic(&now
);
2853 diff1
= timespec_sub(now
, dev_priv
->last_time2
);
2855 /* Don't divide by 0 */
2856 diffms
= diff1
.tv_sec
* 1000 + diff1
.tv_nsec
/ 1000000;
2860 count
= I915_READ(GFXEC
);
2862 if (count
< dev_priv
->last_count2
) {
2863 diff
= ~0UL - dev_priv
->last_count2
;
2866 diff
= count
- dev_priv
->last_count2
;
2869 dev_priv
->last_count2
= count
;
2870 dev_priv
->last_time2
= now
;
2872 /* More magic constants... */
2874 diff
= div_u64(diff
, diffms
* 10);
2875 dev_priv
->gfx_power
= diff
;
2878 unsigned long i915_gfx_val(struct drm_i915_private
*dev_priv
)
2880 unsigned long t
, corr
, state1
, corr2
, state2
;
2883 pxvid
= I915_READ(PXVFREQ_BASE
+ (dev_priv
->cur_delay
* 4));
2884 pxvid
= (pxvid
>> 24) & 0x7f;
2885 ext_v
= pvid_to_extvid(dev_priv
, pxvid
);
2889 t
= i915_mch_val(dev_priv
);
2891 /* Revel in the empirically derived constants */
2893 /* Correction factor in 1/100000 units */
2895 corr
= ((t
* 2349) + 135940);
2897 corr
= ((t
* 964) + 29317);
2899 corr
= ((t
* 301) + 1004);
2901 corr
= corr
* ((150142 * state1
) / 10000 - 78642);
2903 corr2
= (corr
* dev_priv
->corr
);
2905 state2
= (corr2
* state1
) / 10000;
2906 state2
/= 100; /* convert to mW */
2908 i915_update_gfx_val(dev_priv
);
2910 return dev_priv
->gfx_power
+ state2
;
2913 /* Global for IPS driver to get at the current i915 device */
2914 static struct drm_i915_private
*i915_mch_dev
;
2916 * Lock protecting IPS related data structures
2918 * - dev_priv->max_delay
2919 * - dev_priv->min_delay
2921 * - dev_priv->gpu_busy
2923 static DEFINE_SPINLOCK(mchdev_lock
);
2926 * i915_read_mch_val - return value for IPS use
2928 * Calculate and return a value for the IPS driver to use when deciding whether
2929 * we have thermal and power headroom to increase CPU or GPU power budget.
2931 unsigned long i915_read_mch_val(void)
2933 struct drm_i915_private
*dev_priv
;
2934 unsigned long chipset_val
, graphics_val
, ret
= 0;
2936 spin_lock(&mchdev_lock
);
2939 dev_priv
= i915_mch_dev
;
2941 chipset_val
= i915_chipset_val(dev_priv
);
2942 graphics_val
= i915_gfx_val(dev_priv
);
2944 ret
= chipset_val
+ graphics_val
;
2947 spin_unlock(&mchdev_lock
);
2951 EXPORT_SYMBOL_GPL(i915_read_mch_val
);
2954 * i915_gpu_raise - raise GPU frequency limit
2956 * Raise the limit; IPS indicates we have thermal headroom.
2958 bool i915_gpu_raise(void)
2960 struct drm_i915_private
*dev_priv
;
2963 spin_lock(&mchdev_lock
);
2964 if (!i915_mch_dev
) {
2968 dev_priv
= i915_mch_dev
;
2970 if (dev_priv
->max_delay
> dev_priv
->fmax
)
2971 dev_priv
->max_delay
--;
2974 spin_unlock(&mchdev_lock
);
2978 EXPORT_SYMBOL_GPL(i915_gpu_raise
);
2981 * i915_gpu_lower - lower GPU frequency limit
2983 * IPS indicates we're close to a thermal limit, so throttle back the GPU
2984 * frequency maximum.
2986 bool i915_gpu_lower(void)
2988 struct drm_i915_private
*dev_priv
;
2991 spin_lock(&mchdev_lock
);
2992 if (!i915_mch_dev
) {
2996 dev_priv
= i915_mch_dev
;
2998 if (dev_priv
->max_delay
< dev_priv
->min_delay
)
2999 dev_priv
->max_delay
++;
3002 spin_unlock(&mchdev_lock
);
3006 EXPORT_SYMBOL_GPL(i915_gpu_lower
);
3009 * i915_gpu_busy - indicate GPU business to IPS
3011 * Tell the IPS driver whether or not the GPU is busy.
3013 bool i915_gpu_busy(void)
3015 struct drm_i915_private
*dev_priv
;
3018 spin_lock(&mchdev_lock
);
3021 dev_priv
= i915_mch_dev
;
3023 ret
= dev_priv
->busy
;
3026 spin_unlock(&mchdev_lock
);
3030 EXPORT_SYMBOL_GPL(i915_gpu_busy
);
3033 * i915_gpu_turbo_disable - disable graphics turbo
3035 * Disable graphics turbo by resetting the max frequency and setting the
3036 * current frequency to the default.
3038 bool i915_gpu_turbo_disable(void)
3040 struct drm_i915_private
*dev_priv
;
3043 spin_lock(&mchdev_lock
);
3044 if (!i915_mch_dev
) {
3048 dev_priv
= i915_mch_dev
;
3050 dev_priv
->max_delay
= dev_priv
->fstart
;
3052 if (!ironlake_set_drps(dev_priv
->dev
, dev_priv
->fstart
))
3056 spin_unlock(&mchdev_lock
);
3060 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable
);
3063 * Tells the intel_ips driver that the i915 driver is now loaded, if
3064 * IPS got loaded first.
3066 * This awkward dance is so that neither module has to depend on the
3067 * other in order for IPS to do the appropriate communication of
3068 * GPU turbo limits to i915.
3071 ips_ping_for_i915_load(void)
3075 link
= symbol_get(ips_link_to_i915_driver
);
3078 symbol_put(ips_link_to_i915_driver
);
3082 void intel_gpu_ips_init(struct drm_i915_private
*dev_priv
)
3084 spin_lock(&mchdev_lock
);
3085 i915_mch_dev
= dev_priv
;
3086 dev_priv
->mchdev_lock
= &mchdev_lock
;
3087 spin_unlock(&mchdev_lock
);
3089 ips_ping_for_i915_load();
3092 void intel_gpu_ips_teardown(void)
3094 spin_lock(&mchdev_lock
);
3095 i915_mch_dev
= NULL
;
3096 spin_unlock(&mchdev_lock
);
3099 void intel_init_emon(struct drm_device
*dev
)
3101 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3106 /* Disable to program */
3110 /* Program energy weights for various events */
3111 I915_WRITE(SDEW
, 0x15040d00);
3112 I915_WRITE(CSIEW0
, 0x007f0000);
3113 I915_WRITE(CSIEW1
, 0x1e220004);
3114 I915_WRITE(CSIEW2
, 0x04000004);
3116 for (i
= 0; i
< 5; i
++)
3117 I915_WRITE(PEW
+ (i
* 4), 0);
3118 for (i
= 0; i
< 3; i
++)
3119 I915_WRITE(DEW
+ (i
* 4), 0);
3121 /* Program P-state weights to account for frequency power adjustment */
3122 for (i
= 0; i
< 16; i
++) {
3123 u32 pxvidfreq
= I915_READ(PXVFREQ_BASE
+ (i
* 4));
3124 unsigned long freq
= intel_pxfreq(pxvidfreq
);
3125 unsigned long vid
= (pxvidfreq
& PXVFREQ_PX_MASK
) >>
3130 val
*= (freq
/ 1000);
3132 val
/= (127*127*900);
3134 DRM_ERROR("bad pxval: %ld\n", val
);
3137 /* Render standby states get 0 weight */
3141 for (i
= 0; i
< 4; i
++) {
3142 u32 val
= (pxw
[i
*4] << 24) | (pxw
[(i
*4)+1] << 16) |
3143 (pxw
[(i
*4)+2] << 8) | (pxw
[(i
*4)+3]);
3144 I915_WRITE(PXW
+ (i
* 4), val
);
3147 /* Adjust magic regs to magic values (more experimental results) */
3148 I915_WRITE(OGW0
, 0);
3149 I915_WRITE(OGW1
, 0);
3150 I915_WRITE(EG0
, 0x00007f00);
3151 I915_WRITE(EG1
, 0x0000000e);
3152 I915_WRITE(EG2
, 0x000e0000);
3153 I915_WRITE(EG3
, 0x68000300);
3154 I915_WRITE(EG4
, 0x42000000);
3155 I915_WRITE(EG5
, 0x00140031);
3159 for (i
= 0; i
< 8; i
++)
3160 I915_WRITE(PXWL
+ (i
* 4), 0);
3162 /* Enable PMON + select events */
3163 I915_WRITE(ECR
, 0x80000019);
3165 lcfuse
= I915_READ(LCFUSE02
);
3167 dev_priv
->corr
= (lcfuse
& LCFUSE_HIV_MASK
);
3170 static void ironlake_init_clock_gating(struct drm_device
*dev
)
3172 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3173 uint32_t dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
;
3175 /* Required for FBC */
3176 dspclk_gate
|= DPFCUNIT_CLOCK_GATE_DISABLE
|
3177 DPFCRUNIT_CLOCK_GATE_DISABLE
|
3178 DPFDUNIT_CLOCK_GATE_DISABLE
;
3179 /* Required for CxSR */
3180 dspclk_gate
|= DPARBUNIT_CLOCK_GATE_DISABLE
;
3182 I915_WRITE(PCH_3DCGDIS0
,
3183 MARIUNIT_CLOCK_GATE_DISABLE
|
3184 SVSMUNIT_CLOCK_GATE_DISABLE
);
3185 I915_WRITE(PCH_3DCGDIS1
,
3186 VFMUNIT_CLOCK_GATE_DISABLE
);
3188 I915_WRITE(PCH_DSPCLK_GATE_D
, dspclk_gate
);
3191 * According to the spec the following bits should be set in
3192 * order to enable memory self-refresh
3193 * The bit 22/21 of 0x42004
3194 * The bit 5 of 0x42020
3195 * The bit 15 of 0x45000
3197 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
3198 (I915_READ(ILK_DISPLAY_CHICKEN2
) |
3199 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
));
3200 I915_WRITE(ILK_DSPCLK_GATE
,
3201 (I915_READ(ILK_DSPCLK_GATE
) |
3202 ILK_DPARB_CLK_GATE
));
3203 I915_WRITE(DISP_ARB_CTL
,
3204 (I915_READ(DISP_ARB_CTL
) |
3206 I915_WRITE(WM3_LP_ILK
, 0);
3207 I915_WRITE(WM2_LP_ILK
, 0);
3208 I915_WRITE(WM1_LP_ILK
, 0);
3211 * Based on the document from hardware guys the following bits
3212 * should be set unconditionally in order to enable FBC.
3213 * The bit 22 of 0x42000
3214 * The bit 22 of 0x42004
3215 * The bit 7,8,9 of 0x42020.
3217 if (IS_IRONLAKE_M(dev
)) {
3218 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
3219 I915_READ(ILK_DISPLAY_CHICKEN1
) |
3221 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
3222 I915_READ(ILK_DISPLAY_CHICKEN2
) |
3224 I915_WRITE(ILK_DSPCLK_GATE
,
3225 I915_READ(ILK_DSPCLK_GATE
) |
3231 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
3232 I915_READ(ILK_DISPLAY_CHICKEN2
) |
3233 ILK_ELPIN_409_SELECT
);
3234 I915_WRITE(_3D_CHICKEN2
,
3235 _3D_CHICKEN2_WM_READ_PIPELINED
<< 16 |
3236 _3D_CHICKEN2_WM_READ_PIPELINED
);
3239 static void gen6_init_clock_gating(struct drm_device
*dev
)
3241 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3243 uint32_t dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
;
3245 I915_WRITE(PCH_DSPCLK_GATE_D
, dspclk_gate
);
3247 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
3248 I915_READ(ILK_DISPLAY_CHICKEN2
) |
3249 ILK_ELPIN_409_SELECT
);
3251 I915_WRITE(WM3_LP_ILK
, 0);
3252 I915_WRITE(WM2_LP_ILK
, 0);
3253 I915_WRITE(WM1_LP_ILK
, 0);
3255 I915_WRITE(CACHE_MODE_0
,
3256 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB
));
3258 I915_WRITE(GEN6_UCGCTL1
,
3259 I915_READ(GEN6_UCGCTL1
) |
3260 GEN6_BLBUNIT_CLOCK_GATE_DISABLE
|
3261 GEN6_CSUNIT_CLOCK_GATE_DISABLE
);
3263 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
3264 * gating disable must be set. Failure to set it results in
3265 * flickering pixels due to Z write ordering failures after
3266 * some amount of runtime in the Mesa "fire" demo, and Unigine
3267 * Sanctuary and Tropics, and apparently anything else with
3268 * alpha test or pixel discard.
3270 * According to the spec, bit 11 (RCCUNIT) must also be set,
3271 * but we didn't debug actual testcases to find it out.
3273 I915_WRITE(GEN6_UCGCTL2
,
3274 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
3275 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
3277 /* Bspec says we need to always set all mask bits. */
3278 I915_WRITE(_3D_CHICKEN
, (0xFFFF << 16) |
3279 _3D_CHICKEN_SF_DISABLE_FASTCLIP_CULL
);
3282 * According to the spec the following bits should be
3283 * set in order to enable memory self-refresh and fbc:
3284 * The bit21 and bit22 of 0x42000
3285 * The bit21 and bit22 of 0x42004
3286 * The bit5 and bit7 of 0x42020
3287 * The bit14 of 0x70180
3288 * The bit14 of 0x71180
3290 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
3291 I915_READ(ILK_DISPLAY_CHICKEN1
) |
3292 ILK_FBCQ_DIS
| ILK_PABSTRETCH_DIS
);
3293 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
3294 I915_READ(ILK_DISPLAY_CHICKEN2
) |
3295 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
);
3296 I915_WRITE(ILK_DSPCLK_GATE
,
3297 I915_READ(ILK_DSPCLK_GATE
) |
3298 ILK_DPARB_CLK_GATE
|
3301 for_each_pipe(pipe
) {
3302 I915_WRITE(DSPCNTR(pipe
),
3303 I915_READ(DSPCNTR(pipe
)) |
3304 DISPPLANE_TRICKLE_FEED_DISABLE
);
3305 intel_flush_display_plane(dev_priv
, pipe
);
3309 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private
*dev_priv
)
3311 uint32_t reg
= I915_READ(GEN7_FF_THREAD_MODE
);
3313 reg
&= ~GEN7_FF_SCHED_MASK
;
3314 reg
|= GEN7_FF_TS_SCHED_HW
;
3315 reg
|= GEN7_FF_VS_SCHED_HW
;
3316 reg
|= GEN7_FF_DS_SCHED_HW
;
3318 I915_WRITE(GEN7_FF_THREAD_MODE
, reg
);
3321 static void ivybridge_init_clock_gating(struct drm_device
*dev
)
3323 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3325 uint32_t dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
;
3327 I915_WRITE(PCH_DSPCLK_GATE_D
, dspclk_gate
);
3329 I915_WRITE(WM3_LP_ILK
, 0);
3330 I915_WRITE(WM2_LP_ILK
, 0);
3331 I915_WRITE(WM1_LP_ILK
, 0);
3333 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
3334 * This implements the WaDisableRCZUnitClockGating workaround.
3336 I915_WRITE(GEN6_UCGCTL2
, GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
3338 I915_WRITE(ILK_DSPCLK_GATE
, IVB_VRHUNIT_CLK_GATE
);
3340 I915_WRITE(IVB_CHICKEN3
,
3341 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
3342 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
3344 /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
3345 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
3346 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
3348 /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
3349 I915_WRITE(GEN7_L3CNTLREG1
,
3350 GEN7_WA_FOR_GEN7_L3_CONTROL
);
3351 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
3352 GEN7_WA_L3_CHICKEN_MODE
);
3354 /* This is required by WaCatErrorRejectionIssue */
3355 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
3356 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
3357 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
3359 for_each_pipe(pipe
) {
3360 I915_WRITE(DSPCNTR(pipe
),
3361 I915_READ(DSPCNTR(pipe
)) |
3362 DISPPLANE_TRICKLE_FEED_DISABLE
);
3363 intel_flush_display_plane(dev_priv
, pipe
);
3366 gen7_setup_fixed_func_scheduler(dev_priv
);
3368 /* WaDisable4x2SubspanOptimization */
3369 I915_WRITE(CACHE_MODE_1
,
3370 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
3373 static void valleyview_init_clock_gating(struct drm_device
*dev
)
3375 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3377 uint32_t dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
;
3379 I915_WRITE(PCH_DSPCLK_GATE_D
, dspclk_gate
);
3381 I915_WRITE(WM3_LP_ILK
, 0);
3382 I915_WRITE(WM2_LP_ILK
, 0);
3383 I915_WRITE(WM1_LP_ILK
, 0);
3385 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
3386 * This implements the WaDisableRCZUnitClockGating workaround.
3388 I915_WRITE(GEN6_UCGCTL2
, GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
3390 I915_WRITE(ILK_DSPCLK_GATE
, IVB_VRHUNIT_CLK_GATE
);
3392 I915_WRITE(IVB_CHICKEN3
,
3393 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
3394 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
3396 /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
3397 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
3398 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
3400 /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
3401 I915_WRITE(GEN7_L3CNTLREG1
, GEN7_WA_FOR_GEN7_L3_CONTROL
);
3402 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
, GEN7_WA_L3_CHICKEN_MODE
);
3404 /* This is required by WaCatErrorRejectionIssue */
3405 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
3406 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
3407 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
3409 for_each_pipe(pipe
) {
3410 I915_WRITE(DSPCNTR(pipe
),
3411 I915_READ(DSPCNTR(pipe
)) |
3412 DISPPLANE_TRICKLE_FEED_DISABLE
);
3413 intel_flush_display_plane(dev_priv
, pipe
);
3416 I915_WRITE(CACHE_MODE_1
,
3417 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
3420 static void g4x_init_clock_gating(struct drm_device
*dev
)
3422 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3423 uint32_t dspclk_gate
;
3425 I915_WRITE(RENCLK_GATE_D1
, 0);
3426 I915_WRITE(RENCLK_GATE_D2
, VF_UNIT_CLOCK_GATE_DISABLE
|
3427 GS_UNIT_CLOCK_GATE_DISABLE
|
3428 CL_UNIT_CLOCK_GATE_DISABLE
);
3429 I915_WRITE(RAMCLK_GATE_D
, 0);
3430 dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
|
3431 OVRUNIT_CLOCK_GATE_DISABLE
|
3432 OVCUNIT_CLOCK_GATE_DISABLE
;
3434 dspclk_gate
|= DSSUNIT_CLOCK_GATE_DISABLE
;
3435 I915_WRITE(DSPCLK_GATE_D
, dspclk_gate
);
3438 static void crestline_init_clock_gating(struct drm_device
*dev
)
3440 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3442 I915_WRITE(RENCLK_GATE_D1
, I965_RCC_CLOCK_GATE_DISABLE
);
3443 I915_WRITE(RENCLK_GATE_D2
, 0);
3444 I915_WRITE(DSPCLK_GATE_D
, 0);
3445 I915_WRITE(RAMCLK_GATE_D
, 0);
3446 I915_WRITE16(DEUC
, 0);
3449 static void broadwater_init_clock_gating(struct drm_device
*dev
)
3451 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3453 I915_WRITE(RENCLK_GATE_D1
, I965_RCZ_CLOCK_GATE_DISABLE
|
3454 I965_RCC_CLOCK_GATE_DISABLE
|
3455 I965_RCPB_CLOCK_GATE_DISABLE
|
3456 I965_ISC_CLOCK_GATE_DISABLE
|
3457 I965_FBC_CLOCK_GATE_DISABLE
);
3458 I915_WRITE(RENCLK_GATE_D2
, 0);
3461 static void gen3_init_clock_gating(struct drm_device
*dev
)
3463 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3464 u32 dstate
= I915_READ(D_STATE
);
3466 dstate
|= DSTATE_PLL_D3_OFF
| DSTATE_GFX_CLOCK_GATING
|
3467 DSTATE_DOT_CLOCK_GATING
;
3468 I915_WRITE(D_STATE
, dstate
);
3470 if (IS_PINEVIEW(dev
))
3471 I915_WRITE(ECOSKPD
, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY
));
3474 static void i85x_init_clock_gating(struct drm_device
*dev
)
3476 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3478 I915_WRITE(RENCLK_GATE_D1
, SV_CLOCK_GATE_DISABLE
);
3481 static void i830_init_clock_gating(struct drm_device
*dev
)
3483 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3485 I915_WRITE(DSPCLK_GATE_D
, OVRUNIT_CLOCK_GATE_DISABLE
);
3488 static void ibx_init_clock_gating(struct drm_device
*dev
)
3490 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3493 * On Ibex Peak and Cougar Point, we need to disable clock
3494 * gating for the panel power sequencer or it will fail to
3495 * start up when no ports are active.
3497 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
3500 static void cpt_init_clock_gating(struct drm_device
*dev
)
3502 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3506 * On Ibex Peak and Cougar Point, we need to disable clock
3507 * gating for the panel power sequencer or it will fail to
3508 * start up when no ports are active.
3510 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
3511 I915_WRITE(SOUTH_CHICKEN2
, I915_READ(SOUTH_CHICKEN2
) |
3512 DPLS_EDP_PPS_FIX_DIS
);
3513 /* Without this, mode sets may fail silently on FDI */
3515 I915_WRITE(TRANS_CHICKEN2(pipe
), TRANS_AUTOTRAIN_GEN_STALL_DIS
);
3518 void intel_init_clock_gating(struct drm_device
*dev
)
3520 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3522 dev_priv
->display
.init_clock_gating(dev
);
3524 if (dev_priv
->display
.init_pch_clock_gating
)
3525 dev_priv
->display
.init_pch_clock_gating(dev
);
3528 static void gen6_sanitize_pm(struct drm_device
*dev
)
3530 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3531 u32 limits
, delay
, old
;
3533 gen6_gt_force_wake_get(dev_priv
);
3535 old
= limits
= I915_READ(GEN6_RP_INTERRUPT_LIMITS
);
3536 /* Make sure we continue to get interrupts
3537 * until we hit the minimum or maximum frequencies.
3539 limits
&= ~(0x3f << 16 | 0x3f << 24);
3540 delay
= dev_priv
->cur_delay
;
3541 if (delay
< dev_priv
->max_delay
)
3542 limits
|= (dev_priv
->max_delay
& 0x3f) << 24;
3543 if (delay
> dev_priv
->min_delay
)
3544 limits
|= (dev_priv
->min_delay
& 0x3f) << 16;
3546 if (old
!= limits
) {
3547 DRM_ERROR("Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected %08x, was %08x\n",
3549 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
, limits
);
3552 gen6_gt_force_wake_put(dev_priv
);
3555 void intel_sanitize_pm(struct drm_device
*dev
)
3557 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3559 if (dev_priv
->display
.sanitize_pm
)
3560 dev_priv
->display
.sanitize_pm(dev
);
3563 /* Set up chip specific power management-related functions */
3564 void intel_init_pm(struct drm_device
*dev
)
3566 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3568 if (I915_HAS_FBC(dev
)) {
3569 if (HAS_PCH_SPLIT(dev
)) {
3570 dev_priv
->display
.fbc_enabled
= ironlake_fbc_enabled
;
3571 dev_priv
->display
.enable_fbc
= ironlake_enable_fbc
;
3572 dev_priv
->display
.disable_fbc
= ironlake_disable_fbc
;
3573 } else if (IS_GM45(dev
)) {
3574 dev_priv
->display
.fbc_enabled
= g4x_fbc_enabled
;
3575 dev_priv
->display
.enable_fbc
= g4x_enable_fbc
;
3576 dev_priv
->display
.disable_fbc
= g4x_disable_fbc
;
3577 } else if (IS_CRESTLINE(dev
)) {
3578 dev_priv
->display
.fbc_enabled
= i8xx_fbc_enabled
;
3579 dev_priv
->display
.enable_fbc
= i8xx_enable_fbc
;
3580 dev_priv
->display
.disable_fbc
= i8xx_disable_fbc
;
3582 /* 855GM needs testing */
3586 if (IS_PINEVIEW(dev
))
3587 i915_pineview_get_mem_freq(dev
);
3588 else if (IS_GEN5(dev
))
3589 i915_ironlake_get_mem_freq(dev
);
3591 /* For FIFO watermark updates */
3592 if (HAS_PCH_SPLIT(dev
)) {
3593 dev_priv
->display
.force_wake_get
= __gen6_gt_force_wake_get
;
3594 dev_priv
->display
.force_wake_put
= __gen6_gt_force_wake_put
;
3596 /* IVB configs may use multi-threaded forcewake */
3597 if (IS_IVYBRIDGE(dev
) || IS_HASWELL(dev
)) {
3600 /* A small trick here - if the bios hasn't configured MT forcewake,
3601 * and if the device is in RC6, then force_wake_mt_get will not wake
3602 * the device and the ECOBUS read will return zero. Which will be
3603 * (correctly) interpreted by the test below as MT forcewake being
3606 mutex_lock(&dev
->struct_mutex
);
3607 __gen6_gt_force_wake_mt_get(dev_priv
);
3608 ecobus
= I915_READ_NOTRACE(ECOBUS
);
3609 __gen6_gt_force_wake_mt_put(dev_priv
);
3610 mutex_unlock(&dev
->struct_mutex
);
3612 if (ecobus
& FORCEWAKE_MT_ENABLE
) {
3613 DRM_DEBUG_KMS("Using MT version of forcewake\n");
3614 dev_priv
->display
.force_wake_get
=
3615 __gen6_gt_force_wake_mt_get
;
3616 dev_priv
->display
.force_wake_put
=
3617 __gen6_gt_force_wake_mt_put
;
3621 if (HAS_PCH_IBX(dev
))
3622 dev_priv
->display
.init_pch_clock_gating
= ibx_init_clock_gating
;
3623 else if (HAS_PCH_CPT(dev
))
3624 dev_priv
->display
.init_pch_clock_gating
= cpt_init_clock_gating
;
3627 if (I915_READ(MLTR_ILK
) & ILK_SRLT_MASK
)
3628 dev_priv
->display
.update_wm
= ironlake_update_wm
;
3630 DRM_DEBUG_KMS("Failed to get proper latency. "
3632 dev_priv
->display
.update_wm
= NULL
;
3634 dev_priv
->display
.init_clock_gating
= ironlake_init_clock_gating
;
3635 } else if (IS_GEN6(dev
)) {
3636 if (SNB_READ_WM0_LATENCY()) {
3637 dev_priv
->display
.update_wm
= sandybridge_update_wm
;
3638 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
3640 DRM_DEBUG_KMS("Failed to read display plane latency. "
3642 dev_priv
->display
.update_wm
= NULL
;
3644 dev_priv
->display
.init_clock_gating
= gen6_init_clock_gating
;
3645 dev_priv
->display
.sanitize_pm
= gen6_sanitize_pm
;
3646 } else if (IS_IVYBRIDGE(dev
)) {
3647 /* FIXME: detect B0+ stepping and use auto training */
3648 if (SNB_READ_WM0_LATENCY()) {
3649 dev_priv
->display
.update_wm
= sandybridge_update_wm
;
3650 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
3652 DRM_DEBUG_KMS("Failed to read display plane latency. "
3654 dev_priv
->display
.update_wm
= NULL
;
3656 dev_priv
->display
.init_clock_gating
= ivybridge_init_clock_gating
;
3657 dev_priv
->display
.sanitize_pm
= gen6_sanitize_pm
;
3659 dev_priv
->display
.update_wm
= NULL
;
3660 } else if (IS_VALLEYVIEW(dev
)) {
3661 dev_priv
->display
.update_wm
= valleyview_update_wm
;
3662 dev_priv
->display
.init_clock_gating
=
3663 valleyview_init_clock_gating
;
3664 dev_priv
->display
.force_wake_get
= vlv_force_wake_get
;
3665 dev_priv
->display
.force_wake_put
= vlv_force_wake_put
;
3666 } else if (IS_PINEVIEW(dev
)) {
3667 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev
),
3670 dev_priv
->mem_freq
)) {
3671 DRM_INFO("failed to find known CxSR latency "
3672 "(found ddr%s fsb freq %d, mem freq %d), "
3674 (dev_priv
->is_ddr3
== 1) ? "3" : "2",
3675 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
3676 /* Disable CxSR and never update its watermark again */
3677 pineview_disable_cxsr(dev
);
3678 dev_priv
->display
.update_wm
= NULL
;
3680 dev_priv
->display
.update_wm
= pineview_update_wm
;
3681 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
3682 } else if (IS_G4X(dev
)) {
3683 dev_priv
->display
.update_wm
= g4x_update_wm
;
3684 dev_priv
->display
.init_clock_gating
= g4x_init_clock_gating
;
3685 } else if (IS_GEN4(dev
)) {
3686 dev_priv
->display
.update_wm
= i965_update_wm
;
3687 if (IS_CRESTLINE(dev
))
3688 dev_priv
->display
.init_clock_gating
= crestline_init_clock_gating
;
3689 else if (IS_BROADWATER(dev
))
3690 dev_priv
->display
.init_clock_gating
= broadwater_init_clock_gating
;
3691 } else if (IS_GEN3(dev
)) {
3692 dev_priv
->display
.update_wm
= i9xx_update_wm
;
3693 dev_priv
->display
.get_fifo_size
= i9xx_get_fifo_size
;
3694 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
3695 } else if (IS_I865G(dev
)) {
3696 dev_priv
->display
.update_wm
= i830_update_wm
;
3697 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
3698 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
3699 } else if (IS_I85X(dev
)) {
3700 dev_priv
->display
.update_wm
= i9xx_update_wm
;
3701 dev_priv
->display
.get_fifo_size
= i85x_get_fifo_size
;
3702 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
3704 dev_priv
->display
.update_wm
= i830_update_wm
;
3705 dev_priv
->display
.init_clock_gating
= i830_init_clock_gating
;
3707 dev_priv
->display
.get_fifo_size
= i845_get_fifo_size
;
3709 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;