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