1 /*
2 * Copyright © 2012 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
25 *
26 */
27
28 #include "display/i9xx_plane_regs.h"
29 #include "display/intel_display.h"
30
31 #include "gt/intel_engine_regs.h"
32 #include "gt/intel_gt.h"
33 #include "gt/intel_gt_mcr.h"
34 #include "gt/intel_gt_regs.h"
35
36 #include "i915_drv.h"
37 #include "i915_reg.h"
38 #include "intel_clock_gating.h"
39 #include "intel_mchbar_regs.h"
40 #include "vlv_sideband.h"
41
42 struct drm_i915_clock_gating_funcs {
43 void (*init_clock_gating)(struct drm_i915_private *i915);
44 };
45
gen9_init_clock_gating(struct drm_i915_private * i915)46 static void gen9_init_clock_gating(struct drm_i915_private *i915)
47 {
48 if (HAS_LLC(i915)) {
49 /*
50 * WaCompressedResourceDisplayNewHashMode:skl,kbl
51 * Display WA #0390: skl,kbl
52 *
53 * Must match Sampler, Pixel Back End, and Media. See
54 * WaCompressedResourceSamplerPbeMediaNewHashMode.
55 */
56 intel_uncore_rmw(&i915->uncore, CHICKEN_PAR1_1, 0, SKL_DE_COMPRESSED_HASH_MODE);
57 }
58
59 /* See Bspec note for PSR2_CTL bit 31, Wa#828:skl,bxt,kbl,cfl */
60 intel_uncore_rmw(&i915->uncore, CHICKEN_PAR1_1, 0, SKL_EDP_PSR_FIX_RDWRAP);
61
62 /* WaEnableChickenDCPR:skl,bxt,kbl,glk,cfl */
63 intel_uncore_rmw(&i915->uncore, GEN8_CHICKEN_DCPR_1, 0, MASK_WAKEMEM);
64
65 /*
66 * WaFbcWakeMemOn:skl,bxt,kbl,glk,cfl
67 * Display WA #0859: skl,bxt,kbl,glk,cfl
68 */
69 intel_uncore_rmw(&i915->uncore, DISP_ARB_CTL, 0, DISP_FBC_MEMORY_WAKE);
70 }
71
bxt_init_clock_gating(struct drm_i915_private * i915)72 static void bxt_init_clock_gating(struct drm_i915_private *i915)
73 {
74 gen9_init_clock_gating(i915);
75
76 /* WaDisableSDEUnitClockGating:bxt */
77 intel_uncore_rmw(&i915->uncore, GEN8_UCGCTL6, 0, GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
78
79 /*
80 * FIXME:
81 * GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ applies on 3x6 GT SKUs only.
82 */
83 intel_uncore_rmw(&i915->uncore, GEN8_UCGCTL6, 0, GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ);
84
85 /*
86 * Wa: Backlight PWM may stop in the asserted state, causing backlight
87 * to stay fully on.
88 */
89 intel_uncore_write(&i915->uncore, GEN9_CLKGATE_DIS_0,
90 intel_uncore_read(&i915->uncore, GEN9_CLKGATE_DIS_0) |
91 PWM1_GATING_DIS | PWM2_GATING_DIS);
92
93 /*
94 * Lower the display internal timeout.
95 * This is needed to avoid any hard hangs when DSI port PLL
96 * is off and a MMIO access is attempted by any privilege
97 * application, using batch buffers or any other means.
98 */
99 intel_uncore_write(&i915->uncore, RM_TIMEOUT, MMIO_TIMEOUT_US(950));
100
101 /*
102 * WaFbcTurnOffFbcWatermark:bxt
103 * Display WA #0562: bxt
104 */
105 intel_uncore_rmw(&i915->uncore, DISP_ARB_CTL, 0, DISP_FBC_WM_DIS);
106 }
107
glk_init_clock_gating(struct drm_i915_private * i915)108 static void glk_init_clock_gating(struct drm_i915_private *i915)
109 {
110 gen9_init_clock_gating(i915);
111
112 /*
113 * WaDisablePWMClockGating:glk
114 * Backlight PWM may stop in the asserted state, causing backlight
115 * to stay fully on.
116 */
117 intel_uncore_write(&i915->uncore, GEN9_CLKGATE_DIS_0,
118 intel_uncore_read(&i915->uncore, GEN9_CLKGATE_DIS_0) |
119 PWM1_GATING_DIS | PWM2_GATING_DIS);
120 }
121
ibx_init_clock_gating(struct drm_i915_private * i915)122 static void ibx_init_clock_gating(struct drm_i915_private *i915)
123 {
124 /*
125 * On Ibex Peak and Cougar Point, we need to disable clock
126 * gating for the panel power sequencer or it will fail to
127 * start up when no ports are active.
128 */
129 intel_uncore_write(&i915->uncore, SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
130 }
131
g4x_disable_trickle_feed(struct drm_i915_private * dev_priv)132 static void g4x_disable_trickle_feed(struct drm_i915_private *dev_priv)
133 {
134 enum pipe pipe;
135
136 for_each_pipe(dev_priv, pipe) {
137 intel_uncore_rmw(&dev_priv->uncore, DSPCNTR(dev_priv, pipe),
138 0, DISP_TRICKLE_FEED_DISABLE);
139
140 intel_uncore_rmw(&dev_priv->uncore, DSPSURF(dev_priv, pipe),
141 0, 0);
142 intel_uncore_posting_read(&dev_priv->uncore,
143 DSPSURF(dev_priv, pipe));
144 }
145 }
146
ilk_init_clock_gating(struct drm_i915_private * i915)147 static void ilk_init_clock_gating(struct drm_i915_private *i915)
148 {
149 u32 dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
150
151 /*
152 * Required for FBC
153 * WaFbcDisableDpfcClockGating:ilk
154 */
155 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
156 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
157 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
158
159 intel_uncore_write(&i915->uncore, PCH_3DCGDIS0,
160 MARIUNIT_CLOCK_GATE_DISABLE |
161 SVSMUNIT_CLOCK_GATE_DISABLE);
162 intel_uncore_write(&i915->uncore, PCH_3DCGDIS1,
163 VFMUNIT_CLOCK_GATE_DISABLE);
164
165 /*
166 * According to the spec the following bits should be set in
167 * order to enable memory self-refresh
168 * The bit 22/21 of 0x42004
169 * The bit 5 of 0x42020
170 * The bit 15 of 0x45000
171 */
172 intel_uncore_write(&i915->uncore, ILK_DISPLAY_CHICKEN2,
173 (intel_uncore_read(&i915->uncore, ILK_DISPLAY_CHICKEN2) |
174 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
175 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
176 intel_uncore_write(&i915->uncore, DISP_ARB_CTL,
177 (intel_uncore_read(&i915->uncore, DISP_ARB_CTL) |
178 DISP_FBC_WM_DIS));
179
180 /*
181 * Based on the document from hardware guys the following bits
182 * should be set unconditionally in order to enable FBC.
183 * The bit 22 of 0x42000
184 * The bit 22 of 0x42004
185 * The bit 7,8,9 of 0x42020.
186 */
187 if (IS_IRONLAKE_M(i915)) {
188 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
189 intel_uncore_rmw(&i915->uncore, ILK_DISPLAY_CHICKEN1, 0, ILK_FBCQ_DIS);
190 intel_uncore_rmw(&i915->uncore, ILK_DISPLAY_CHICKEN2, 0, ILK_DPARB_GATE);
191 }
192
193 intel_uncore_write(&i915->uncore, ILK_DSPCLK_GATE_D, dspclk_gate);
194
195 intel_uncore_rmw(&i915->uncore, ILK_DISPLAY_CHICKEN2, 0, ILK_ELPIN_409_SELECT);
196
197 g4x_disable_trickle_feed(i915);
198
199 ibx_init_clock_gating(i915);
200 }
201
cpt_init_clock_gating(struct drm_i915_private * i915)202 static void cpt_init_clock_gating(struct drm_i915_private *i915)
203 {
204 enum pipe pipe;
205 u32 val;
206
207 /*
208 * On Ibex Peak and Cougar Point, we need to disable clock
209 * gating for the panel power sequencer or it will fail to
210 * start up when no ports are active.
211 */
212 intel_uncore_write(&i915->uncore, SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
213 PCH_DPLUNIT_CLOCK_GATE_DISABLE |
214 PCH_CPUNIT_CLOCK_GATE_DISABLE);
215 intel_uncore_rmw(&i915->uncore, SOUTH_CHICKEN2, 0, DPLS_EDP_PPS_FIX_DIS);
216 /* The below fixes the weird display corruption, a few pixels shifted
217 * downward, on (only) LVDS of some HP laptops with IVY.
218 */
219 for_each_pipe(i915, pipe) {
220 val = intel_uncore_read(&i915->uncore, TRANS_CHICKEN2(pipe));
221 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
222 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
223 if (i915->display.vbt.fdi_rx_polarity_inverted)
224 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
225 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
226 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
227 intel_uncore_write(&i915->uncore, TRANS_CHICKEN2(pipe), val);
228 }
229 /* WADP0ClockGatingDisable */
230 for_each_pipe(i915, pipe) {
231 intel_uncore_write(&i915->uncore, TRANS_CHICKEN1(pipe),
232 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
233 }
234 }
235
gen6_check_mch_setup(struct drm_i915_private * i915)236 static void gen6_check_mch_setup(struct drm_i915_private *i915)
237 {
238 u32 tmp;
239
240 tmp = intel_uncore_read(&i915->uncore, MCH_SSKPD);
241 if (REG_FIELD_GET(SSKPD_WM0_MASK_SNB, tmp) != 12)
242 drm_dbg_kms(&i915->drm,
243 "Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n",
244 tmp);
245 }
246
gen6_init_clock_gating(struct drm_i915_private * i915)247 static void gen6_init_clock_gating(struct drm_i915_private *i915)
248 {
249 u32 dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
250
251 intel_uncore_write(&i915->uncore, ILK_DSPCLK_GATE_D, dspclk_gate);
252
253 intel_uncore_rmw(&i915->uncore, ILK_DISPLAY_CHICKEN2, 0, ILK_ELPIN_409_SELECT);
254
255 intel_uncore_write(&i915->uncore, GEN6_UCGCTL1,
256 intel_uncore_read(&i915->uncore, GEN6_UCGCTL1) |
257 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
258 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
259
260 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
261 * gating disable must be set. Failure to set it results in
262 * flickering pixels due to Z write ordering failures after
263 * some amount of runtime in the Mesa "fire" demo, and Unigine
264 * Sanctuary and Tropics, and apparently anything else with
265 * alpha test or pixel discard.
266 *
267 * According to the spec, bit 11 (RCCUNIT) must also be set,
268 * but we didn't debug actual testcases to find it out.
269 *
270 * WaDisableRCCUnitClockGating:snb
271 * WaDisableRCPBUnitClockGating:snb
272 */
273 intel_uncore_write(&i915->uncore, GEN6_UCGCTL2,
274 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
275 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
276
277 /*
278 * According to the spec the following bits should be
279 * set in order to enable memory self-refresh and fbc:
280 * The bit21 and bit22 of 0x42000
281 * The bit21 and bit22 of 0x42004
282 * The bit5 and bit7 of 0x42020
283 * The bit14 of 0x70180
284 * The bit14 of 0x71180
285 *
286 * WaFbcAsynchFlipDisableFbcQueue:snb
287 */
288 intel_uncore_write(&i915->uncore, ILK_DISPLAY_CHICKEN1,
289 intel_uncore_read(&i915->uncore, ILK_DISPLAY_CHICKEN1) |
290 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
291 intel_uncore_write(&i915->uncore, ILK_DISPLAY_CHICKEN2,
292 intel_uncore_read(&i915->uncore, ILK_DISPLAY_CHICKEN2) |
293 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
294 intel_uncore_write(&i915->uncore, ILK_DSPCLK_GATE_D,
295 intel_uncore_read(&i915->uncore, ILK_DSPCLK_GATE_D) |
296 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
297 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
298
299 g4x_disable_trickle_feed(i915);
300
301 cpt_init_clock_gating(i915);
302
303 gen6_check_mch_setup(i915);
304 }
305
lpt_init_clock_gating(struct drm_i915_private * i915)306 static void lpt_init_clock_gating(struct drm_i915_private *i915)
307 {
308 /*
309 * TODO: this bit should only be enabled when really needed, then
310 * disabled when not needed anymore in order to save power.
311 */
312 if (HAS_PCH_LPT_LP(i915))
313 intel_uncore_rmw(&i915->uncore, SOUTH_DSPCLK_GATE_D,
314 0, PCH_LP_PARTITION_LEVEL_DISABLE);
315
316 /* WADPOClockGatingDisable:hsw */
317 intel_uncore_rmw(&i915->uncore, TRANS_CHICKEN1(PIPE_A),
318 0, TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
319 }
320
gen8_set_l3sqc_credits(struct drm_i915_private * i915,int general_prio_credits,int high_prio_credits)321 static void gen8_set_l3sqc_credits(struct drm_i915_private *i915,
322 int general_prio_credits,
323 int high_prio_credits)
324 {
325 u32 misccpctl;
326 u32 val;
327
328 /* WaTempDisableDOPClkGating:bdw */
329 misccpctl = intel_uncore_rmw(&i915->uncore, GEN7_MISCCPCTL,
330 GEN7_DOP_CLOCK_GATE_ENABLE, 0);
331
332 val = intel_gt_mcr_read_any(to_gt(i915), GEN8_L3SQCREG1);
333 val &= ~L3_PRIO_CREDITS_MASK;
334 val |= L3_GENERAL_PRIO_CREDITS(general_prio_credits);
335 val |= L3_HIGH_PRIO_CREDITS(high_prio_credits);
336 intel_gt_mcr_multicast_write(to_gt(i915), GEN8_L3SQCREG1, val);
337
338 /*
339 * Wait at least 100 clocks before re-enabling clock gating.
340 * See the definition of L3SQCREG1 in BSpec.
341 */
342 intel_gt_mcr_read_any(to_gt(i915), GEN8_L3SQCREG1);
343 udelay(1);
344 intel_uncore_write(&i915->uncore, GEN7_MISCCPCTL, misccpctl);
345 }
346
dg2_init_clock_gating(struct drm_i915_private * i915)347 static void dg2_init_clock_gating(struct drm_i915_private *i915)
348 {
349 /* Wa_22010954014:dg2 */
350 intel_uncore_rmw(&i915->uncore, XEHP_CLOCK_GATE_DIS, 0,
351 SGSI_SIDECLK_DIS);
352 }
353
cnp_init_clock_gating(struct drm_i915_private * i915)354 static void cnp_init_clock_gating(struct drm_i915_private *i915)
355 {
356 if (!HAS_PCH_CNP(i915))
357 return;
358
359 /* Display WA #1181 WaSouthDisplayDisablePWMCGEGating: cnp */
360 intel_uncore_rmw(&i915->uncore, SOUTH_DSPCLK_GATE_D, 0, CNP_PWM_CGE_GATING_DISABLE);
361 }
362
cfl_init_clock_gating(struct drm_i915_private * i915)363 static void cfl_init_clock_gating(struct drm_i915_private *i915)
364 {
365 cnp_init_clock_gating(i915);
366 gen9_init_clock_gating(i915);
367
368 /* WAC6entrylatency:cfl */
369 intel_uncore_rmw(&i915->uncore, FBC_LLC_READ_CTRL, 0, FBC_LLC_FULLY_OPEN);
370
371 /*
372 * WaFbcTurnOffFbcWatermark:cfl
373 * Display WA #0562: cfl
374 */
375 intel_uncore_rmw(&i915->uncore, DISP_ARB_CTL, 0, DISP_FBC_WM_DIS);
376 }
377
kbl_init_clock_gating(struct drm_i915_private * i915)378 static void kbl_init_clock_gating(struct drm_i915_private *i915)
379 {
380 gen9_init_clock_gating(i915);
381
382 /* WAC6entrylatency:kbl */
383 intel_uncore_rmw(&i915->uncore, FBC_LLC_READ_CTRL, 0, FBC_LLC_FULLY_OPEN);
384
385 /* WaDisableSDEUnitClockGating:kbl */
386 if (IS_KABYLAKE(i915) && IS_GRAPHICS_STEP(i915, 0, STEP_C0))
387 intel_uncore_rmw(&i915->uncore, GEN8_UCGCTL6,
388 0, GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
389
390 /* WaDisableGamClockGating:kbl */
391 if (IS_KABYLAKE(i915) && IS_GRAPHICS_STEP(i915, 0, STEP_C0))
392 intel_uncore_rmw(&i915->uncore, GEN6_UCGCTL1,
393 0, GEN6_GAMUNIT_CLOCK_GATE_DISABLE);
394
395 /*
396 * WaFbcTurnOffFbcWatermark:kbl
397 * Display WA #0562: kbl
398 */
399 intel_uncore_rmw(&i915->uncore, DISP_ARB_CTL, 0, DISP_FBC_WM_DIS);
400 }
401
skl_init_clock_gating(struct drm_i915_private * i915)402 static void skl_init_clock_gating(struct drm_i915_private *i915)
403 {
404 gen9_init_clock_gating(i915);
405
406 /* WaDisableDopClockGating:skl */
407 intel_uncore_rmw(&i915->uncore, GEN7_MISCCPCTL,
408 GEN7_DOP_CLOCK_GATE_ENABLE, 0);
409
410 /* WAC6entrylatency:skl */
411 intel_uncore_rmw(&i915->uncore, FBC_LLC_READ_CTRL, 0, FBC_LLC_FULLY_OPEN);
412
413 /*
414 * WaFbcTurnOffFbcWatermark:skl
415 * Display WA #0562: skl
416 */
417 intel_uncore_rmw(&i915->uncore, DISP_ARB_CTL, 0, DISP_FBC_WM_DIS);
418 }
419
bdw_init_clock_gating(struct drm_i915_private * i915)420 static void bdw_init_clock_gating(struct drm_i915_private *i915)
421 {
422 enum pipe pipe;
423
424 /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */
425 intel_uncore_rmw(&i915->uncore, CHICKEN_PIPESL_1(PIPE_A), 0, HSW_FBCQ_DIS);
426
427 /* WaSwitchSolVfFArbitrationPriority:bdw */
428 intel_uncore_rmw(&i915->uncore, GAM_ECOCHK, 0, HSW_ECOCHK_ARB_PRIO_SOL);
429
430 /* WaPsrDPAMaskVBlankInSRD:bdw */
431 intel_uncore_rmw(&i915->uncore, CHICKEN_PAR1_1, 0, HSW_MASK_VBL_TO_PIPE_IN_SRD);
432
433 for_each_pipe(i915, pipe) {
434 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
435 intel_uncore_rmw(&i915->uncore, CHICKEN_PIPESL_1(pipe),
436 0, BDW_UNMASK_VBL_TO_REGS_IN_SRD);
437 }
438
439 /* WaVSRefCountFullforceMissDisable:bdw */
440 /* WaDSRefCountFullforceMissDisable:bdw */
441 intel_uncore_rmw(&i915->uncore, GEN7_FF_THREAD_MODE,
442 GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME, 0);
443
444 intel_uncore_write(&i915->uncore, RING_PSMI_CTL(RENDER_RING_BASE),
445 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
446
447 /* WaDisableSDEUnitClockGating:bdw */
448 intel_uncore_rmw(&i915->uncore, GEN8_UCGCTL6, 0, GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
449
450 /* WaProgramL3SqcReg1Default:bdw */
451 gen8_set_l3sqc_credits(i915, 30, 2);
452
453 /* WaKVMNotificationOnConfigChange:bdw */
454 intel_uncore_rmw(&i915->uncore, CHICKEN_PAR2_1,
455 0, KVM_CONFIG_CHANGE_NOTIFICATION_SELECT);
456
457 lpt_init_clock_gating(i915);
458
459 /* WaDisableDopClockGating:bdw
460 *
461 * Also see the CHICKEN2 write in bdw_init_workarounds() to disable DOP
462 * clock gating.
463 */
464 intel_uncore_rmw(&i915->uncore, GEN6_UCGCTL1, 0, GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE);
465 }
466
hsw_init_clock_gating(struct drm_i915_private * i915)467 static void hsw_init_clock_gating(struct drm_i915_private *i915)
468 {
469 enum pipe pipe;
470
471 /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */
472 intel_uncore_rmw(&i915->uncore, CHICKEN_PIPESL_1(PIPE_A), 0, HSW_FBCQ_DIS);
473
474 /* WaPsrDPAMaskVBlankInSRD:hsw */
475 intel_uncore_rmw(&i915->uncore, CHICKEN_PAR1_1, 0, HSW_MASK_VBL_TO_PIPE_IN_SRD);
476
477 for_each_pipe(i915, pipe) {
478 /* WaPsrDPRSUnmaskVBlankInSRD:hsw */
479 intel_uncore_rmw(&i915->uncore, CHICKEN_PIPESL_1(pipe),
480 0, HSW_UNMASK_VBL_TO_REGS_IN_SRD);
481 }
482
483 /* This is required by WaCatErrorRejectionIssue:hsw */
484 intel_uncore_rmw(&i915->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
485 0, GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
486
487 /* WaSwitchSolVfFArbitrationPriority:hsw */
488 intel_uncore_rmw(&i915->uncore, GAM_ECOCHK, 0, HSW_ECOCHK_ARB_PRIO_SOL);
489
490 lpt_init_clock_gating(i915);
491 }
492
ivb_init_clock_gating(struct drm_i915_private * i915)493 static void ivb_init_clock_gating(struct drm_i915_private *i915)
494 {
495 intel_uncore_write(&i915->uncore, ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
496
497 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
498 intel_uncore_rmw(&i915->uncore, ILK_DISPLAY_CHICKEN1, 0, ILK_FBCQ_DIS);
499
500 /* WaDisableBackToBackFlipFix:ivb */
501 intel_uncore_write(&i915->uncore, IVB_CHICKEN3,
502 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
503 CHICKEN3_DGMG_DONE_FIX_DISABLE);
504
505 if (IS_IVB_GT1(i915))
506 intel_uncore_write(&i915->uncore, GEN7_ROW_CHICKEN2,
507 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
508 else {
509 /* must write both registers */
510 intel_uncore_write(&i915->uncore, GEN7_ROW_CHICKEN2,
511 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
512 intel_uncore_write(&i915->uncore, GEN7_ROW_CHICKEN2_GT2,
513 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
514 }
515
516 /*
517 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
518 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
519 */
520 intel_uncore_write(&i915->uncore, GEN6_UCGCTL2,
521 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
522
523 /* This is required by WaCatErrorRejectionIssue:ivb */
524 intel_uncore_rmw(&i915->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
525 0, GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
526
527 g4x_disable_trickle_feed(i915);
528
529 intel_uncore_rmw(&i915->uncore, GEN6_MBCUNIT_SNPCR, GEN6_MBC_SNPCR_MASK,
530 GEN6_MBC_SNPCR_MED);
531
532 if (!HAS_PCH_NOP(i915))
533 cpt_init_clock_gating(i915);
534
535 gen6_check_mch_setup(i915);
536 }
537
vlv_init_clock_gating(struct drm_i915_private * i915)538 static void vlv_init_clock_gating(struct drm_i915_private *i915)
539 {
540 /* WaDisableBackToBackFlipFix:vlv */
541 intel_uncore_write(&i915->uncore, IVB_CHICKEN3,
542 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
543 CHICKEN3_DGMG_DONE_FIX_DISABLE);
544
545 /* WaDisableDopClockGating:vlv */
546 intel_uncore_write(&i915->uncore, GEN7_ROW_CHICKEN2,
547 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
548
549 /* This is required by WaCatErrorRejectionIssue:vlv */
550 intel_uncore_rmw(&i915->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
551 0, GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
552
553 /*
554 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
555 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
556 */
557 intel_uncore_write(&i915->uncore, GEN6_UCGCTL2,
558 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
559
560 /* WaDisableL3Bank2xClockGate:vlv
561 * Disabling L3 clock gating- MMIO 940c[25] = 1
562 * Set bit 25, to disable L3_BANK_2x_CLK_GATING */
563 intel_uncore_rmw(&i915->uncore, GEN7_UCGCTL4, 0, GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
564
565 /*
566 * WaDisableVLVClockGating_VBIIssue:vlv
567 * Disable clock gating on th GCFG unit to prevent a delay
568 * in the reporting of vblank events.
569 */
570 intel_uncore_write(&i915->uncore, VLV_GUNIT_CLOCK_GATE, GCFG_DIS);
571 }
572
chv_init_clock_gating(struct drm_i915_private * i915)573 static void chv_init_clock_gating(struct drm_i915_private *i915)
574 {
575 /* WaVSRefCountFullforceMissDisable:chv */
576 /* WaDSRefCountFullforceMissDisable:chv */
577 intel_uncore_rmw(&i915->uncore, GEN7_FF_THREAD_MODE,
578 GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME, 0);
579
580 /* WaDisableSemaphoreAndSyncFlipWait:chv */
581 intel_uncore_write(&i915->uncore, RING_PSMI_CTL(RENDER_RING_BASE),
582 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
583
584 /* WaDisableCSUnitClockGating:chv */
585 intel_uncore_rmw(&i915->uncore, GEN6_UCGCTL1, 0, GEN6_CSUNIT_CLOCK_GATE_DISABLE);
586
587 /* WaDisableSDEUnitClockGating:chv */
588 intel_uncore_rmw(&i915->uncore, GEN8_UCGCTL6, 0, GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
589
590 /*
591 * WaProgramL3SqcReg1Default:chv
592 * See gfxspecs/Related Documents/Performance Guide/
593 * LSQC Setting Recommendations.
594 */
595 gen8_set_l3sqc_credits(i915, 38, 2);
596 }
597
g4x_init_clock_gating(struct drm_i915_private * i915)598 static void g4x_init_clock_gating(struct drm_i915_private *i915)
599 {
600 u32 dspclk_gate;
601
602 intel_uncore_write(&i915->uncore, RENCLK_GATE_D1, 0);
603 intel_uncore_write(&i915->uncore, RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
604 GS_UNIT_CLOCK_GATE_DISABLE |
605 CL_UNIT_CLOCK_GATE_DISABLE);
606 intel_uncore_write(&i915->uncore, RAMCLK_GATE_D, 0);
607 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
608 OVRUNIT_CLOCK_GATE_DISABLE |
609 OVCUNIT_CLOCK_GATE_DISABLE;
610 if (IS_GM45(i915))
611 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
612 intel_uncore_write(&i915->uncore, DSPCLK_GATE_D(i915), dspclk_gate);
613
614 g4x_disable_trickle_feed(i915);
615 }
616
i965gm_init_clock_gating(struct drm_i915_private * i915)617 static void i965gm_init_clock_gating(struct drm_i915_private *i915)
618 {
619 struct intel_uncore *uncore = &i915->uncore;
620
621 intel_uncore_write(uncore, RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
622 intel_uncore_write(uncore, RENCLK_GATE_D2, 0);
623 intel_uncore_write(uncore, DSPCLK_GATE_D(i915), 0);
624 intel_uncore_write(uncore, RAMCLK_GATE_D, 0);
625 intel_uncore_write16(uncore, DEUC, 0);
626 intel_uncore_write(uncore,
627 MI_ARB_STATE,
628 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
629 }
630
i965g_init_clock_gating(struct drm_i915_private * i915)631 static void i965g_init_clock_gating(struct drm_i915_private *i915)
632 {
633 intel_uncore_write(&i915->uncore, RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
634 I965_RCC_CLOCK_GATE_DISABLE |
635 I965_RCPB_CLOCK_GATE_DISABLE |
636 I965_ISC_CLOCK_GATE_DISABLE |
637 I965_FBC_CLOCK_GATE_DISABLE);
638 intel_uncore_write(&i915->uncore, RENCLK_GATE_D2, 0);
639 intel_uncore_write(&i915->uncore, MI_ARB_STATE,
640 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
641 }
642
gen3_init_clock_gating(struct drm_i915_private * i915)643 static void gen3_init_clock_gating(struct drm_i915_private *i915)
644 {
645 u32 dstate = intel_uncore_read(&i915->uncore, D_STATE);
646
647 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
648 DSTATE_DOT_CLOCK_GATING;
649 intel_uncore_write(&i915->uncore, D_STATE, dstate);
650
651 if (IS_PINEVIEW(i915))
652 intel_uncore_write(&i915->uncore, ECOSKPD(RENDER_RING_BASE),
653 _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
654
655 /* IIR "flip pending" means done if this bit is set */
656 intel_uncore_write(&i915->uncore, ECOSKPD(RENDER_RING_BASE),
657 _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
658
659 /* interrupts should cause a wake up from C3 */
660 intel_uncore_write(&i915->uncore, INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_INT_EN));
661
662 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
663 intel_uncore_write(&i915->uncore, MI_ARB_STATE,
664 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE));
665
666 intel_uncore_write(&i915->uncore, MI_ARB_STATE,
667 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
668 }
669
i85x_init_clock_gating(struct drm_i915_private * i915)670 static void i85x_init_clock_gating(struct drm_i915_private *i915)
671 {
672 intel_uncore_write(&i915->uncore, RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
673
674 /* interrupts should cause a wake up from C3 */
675 intel_uncore_write(&i915->uncore, MI_STATE, _MASKED_BIT_ENABLE(MI_AGPBUSY_INT_EN) |
676 _MASKED_BIT_DISABLE(MI_AGPBUSY_830_MODE));
677
678 intel_uncore_write(&i915->uncore, MEM_MODE,
679 _MASKED_BIT_ENABLE(MEM_DISPLAY_TRICKLE_FEED_DISABLE));
680
681 /*
682 * Have FBC ignore 3D activity since we use software
683 * render tracking, and otherwise a pure 3D workload
684 * (even if it just renders a single frame and then does
685 * abosultely nothing) would not allow FBC to recompress
686 * until a 2D blit occurs.
687 */
688 intel_uncore_write(&i915->uncore, SCPD0,
689 _MASKED_BIT_ENABLE(SCPD_FBC_IGNORE_3D));
690 }
691
i830_init_clock_gating(struct drm_i915_private * i915)692 static void i830_init_clock_gating(struct drm_i915_private *i915)
693 {
694 intel_uncore_write(&i915->uncore, MEM_MODE,
695 _MASKED_BIT_ENABLE(MEM_DISPLAY_A_TRICKLE_FEED_DISABLE) |
696 _MASKED_BIT_ENABLE(MEM_DISPLAY_B_TRICKLE_FEED_DISABLE));
697 }
698
intel_clock_gating_init(struct drm_i915_private * i915)699 void intel_clock_gating_init(struct drm_i915_private *i915)
700 {
701 i915->clock_gating_funcs->init_clock_gating(i915);
702 }
703
nop_init_clock_gating(struct drm_i915_private * i915)704 static void nop_init_clock_gating(struct drm_i915_private *i915)
705 {
706 drm_dbg_kms(&i915->drm,
707 "No clock gating settings or workarounds applied.\n");
708 }
709
710 #define CG_FUNCS(platform) \
711 static const struct drm_i915_clock_gating_funcs platform##_clock_gating_funcs = { \
712 .init_clock_gating = platform##_init_clock_gating, \
713 }
714
715 CG_FUNCS(dg2);
716 CG_FUNCS(cfl);
717 CG_FUNCS(skl);
718 CG_FUNCS(kbl);
719 CG_FUNCS(bxt);
720 CG_FUNCS(glk);
721 CG_FUNCS(bdw);
722 CG_FUNCS(chv);
723 CG_FUNCS(hsw);
724 CG_FUNCS(ivb);
725 CG_FUNCS(vlv);
726 CG_FUNCS(gen6);
727 CG_FUNCS(ilk);
728 CG_FUNCS(g4x);
729 CG_FUNCS(i965gm);
730 CG_FUNCS(i965g);
731 CG_FUNCS(gen3);
732 CG_FUNCS(i85x);
733 CG_FUNCS(i830);
734 CG_FUNCS(nop);
735 #undef CG_FUNCS
736
737 /**
738 * intel_clock_gating_hooks_init - setup the clock gating hooks
739 * @i915: device private
740 *
741 * Setup the hooks that configure which clocks of a given platform can be
742 * gated and also apply various GT and display specific workarounds for these
743 * platforms. Note that some GT specific workarounds are applied separately
744 * when GPU contexts or batchbuffers start their execution.
745 */
intel_clock_gating_hooks_init(struct drm_i915_private * i915)746 void intel_clock_gating_hooks_init(struct drm_i915_private *i915)
747 {
748 if (IS_DG2(i915))
749 i915->clock_gating_funcs = &dg2_clock_gating_funcs;
750 else if (IS_COFFEELAKE(i915) || IS_COMETLAKE(i915))
751 i915->clock_gating_funcs = &cfl_clock_gating_funcs;
752 else if (IS_SKYLAKE(i915))
753 i915->clock_gating_funcs = &skl_clock_gating_funcs;
754 else if (IS_KABYLAKE(i915))
755 i915->clock_gating_funcs = &kbl_clock_gating_funcs;
756 else if (IS_BROXTON(i915))
757 i915->clock_gating_funcs = &bxt_clock_gating_funcs;
758 else if (IS_GEMINILAKE(i915))
759 i915->clock_gating_funcs = &glk_clock_gating_funcs;
760 else if (IS_BROADWELL(i915))
761 i915->clock_gating_funcs = &bdw_clock_gating_funcs;
762 else if (IS_CHERRYVIEW(i915))
763 i915->clock_gating_funcs = &chv_clock_gating_funcs;
764 else if (IS_HASWELL(i915))
765 i915->clock_gating_funcs = &hsw_clock_gating_funcs;
766 else if (IS_IVYBRIDGE(i915))
767 i915->clock_gating_funcs = &ivb_clock_gating_funcs;
768 else if (IS_VALLEYVIEW(i915))
769 i915->clock_gating_funcs = &vlv_clock_gating_funcs;
770 else if (GRAPHICS_VER(i915) == 6)
771 i915->clock_gating_funcs = &gen6_clock_gating_funcs;
772 else if (GRAPHICS_VER(i915) == 5)
773 i915->clock_gating_funcs = &ilk_clock_gating_funcs;
774 else if (IS_G4X(i915))
775 i915->clock_gating_funcs = &g4x_clock_gating_funcs;
776 else if (IS_I965GM(i915))
777 i915->clock_gating_funcs = &i965gm_clock_gating_funcs;
778 else if (IS_I965G(i915))
779 i915->clock_gating_funcs = &i965g_clock_gating_funcs;
780 else if (GRAPHICS_VER(i915) == 3)
781 i915->clock_gating_funcs = &gen3_clock_gating_funcs;
782 else if (IS_I85X(i915) || IS_I865G(i915))
783 i915->clock_gating_funcs = &i85x_clock_gating_funcs;
784 else if (GRAPHICS_VER(i915) == 2)
785 i915->clock_gating_funcs = &i830_clock_gating_funcs;
786 else
787 i915->clock_gating_funcs = &nop_clock_gating_funcs;
788 }
789