1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*- 2 */ 3 /* 4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/circ_buf.h> 32 #include <linux/slab.h> 33 #include <linux/sysrq.h> 34 35 #include <drm/drm_drv.h> 36 #include <drm/drm_irq.h> 37 38 #include "display/intel_de.h" 39 #include "display/intel_display_types.h" 40 #include "display/intel_fifo_underrun.h" 41 #include "display/intel_hotplug.h" 42 #include "display/intel_lpe_audio.h" 43 #include "display/intel_psr.h" 44 45 #include "gt/intel_breadcrumbs.h" 46 #include "gt/intel_gt.h" 47 #include "gt/intel_gt_irq.h" 48 #include "gt/intel_gt_pm_irq.h" 49 #include "gt/intel_rps.h" 50 51 #include "i915_drv.h" 52 #include "i915_irq.h" 53 #include "i915_trace.h" 54 #include "intel_pm.h" 55 56 /** 57 * DOC: interrupt handling 58 * 59 * These functions provide the basic support for enabling and disabling the 60 * interrupt handling support. There's a lot more functionality in i915_irq.c 61 * and related files, but that will be described in separate chapters. 62 */ 63 64 /* 65 * Interrupt statistic for PMU. Increments the counter only if the 66 * interrupt originated from the the GPU so interrupts from a device which 67 * shares the interrupt line are not accounted. 68 */ 69 static inline void pmu_irq_stats(struct drm_i915_private *i915, 70 irqreturn_t res) 71 { 72 if (unlikely(res != IRQ_HANDLED)) 73 return; 74 75 /* 76 * A clever compiler translates that into INC. A not so clever one 77 * should at least prevent store tearing. 78 */ 79 WRITE_ONCE(i915->pmu.irq_count, i915->pmu.irq_count + 1); 80 } 81 82 typedef bool (*long_pulse_detect_func)(enum hpd_pin pin, u32 val); 83 typedef u32 (*hotplug_enables_func)(struct drm_i915_private *i915, 84 enum hpd_pin pin); 85 86 static const u32 hpd_ilk[HPD_NUM_PINS] = { 87 [HPD_PORT_A] = DE_DP_A_HOTPLUG, 88 }; 89 90 static const u32 hpd_ivb[HPD_NUM_PINS] = { 91 [HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB, 92 }; 93 94 static const u32 hpd_bdw[HPD_NUM_PINS] = { 95 [HPD_PORT_A] = GEN8_DE_PORT_HOTPLUG(HPD_PORT_A), 96 }; 97 98 static const u32 hpd_ibx[HPD_NUM_PINS] = { 99 [HPD_CRT] = SDE_CRT_HOTPLUG, 100 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG, 101 [HPD_PORT_B] = SDE_PORTB_HOTPLUG, 102 [HPD_PORT_C] = SDE_PORTC_HOTPLUG, 103 [HPD_PORT_D] = SDE_PORTD_HOTPLUG, 104 }; 105 106 static const u32 hpd_cpt[HPD_NUM_PINS] = { 107 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT, 108 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT, 109 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT, 110 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT, 111 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT, 112 }; 113 114 static const u32 hpd_spt[HPD_NUM_PINS] = { 115 [HPD_PORT_A] = SDE_PORTA_HOTPLUG_SPT, 116 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT, 117 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT, 118 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT, 119 [HPD_PORT_E] = SDE_PORTE_HOTPLUG_SPT, 120 }; 121 122 static const u32 hpd_mask_i915[HPD_NUM_PINS] = { 123 [HPD_CRT] = CRT_HOTPLUG_INT_EN, 124 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN, 125 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN, 126 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN, 127 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN, 128 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN, 129 }; 130 131 static const u32 hpd_status_g4x[HPD_NUM_PINS] = { 132 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS, 133 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X, 134 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X, 135 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS, 136 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS, 137 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS, 138 }; 139 140 static const u32 hpd_status_i915[HPD_NUM_PINS] = { 141 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS, 142 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915, 143 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915, 144 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS, 145 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS, 146 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS, 147 }; 148 149 static const u32 hpd_bxt[HPD_NUM_PINS] = { 150 [HPD_PORT_A] = GEN8_DE_PORT_HOTPLUG(HPD_PORT_A), 151 [HPD_PORT_B] = GEN8_DE_PORT_HOTPLUG(HPD_PORT_B), 152 [HPD_PORT_C] = GEN8_DE_PORT_HOTPLUG(HPD_PORT_C), 153 }; 154 155 static const u32 hpd_gen11[HPD_NUM_PINS] = { 156 [HPD_PORT_TC1] = GEN11_TC_HOTPLUG(HPD_PORT_TC1) | GEN11_TBT_HOTPLUG(HPD_PORT_TC1), 157 [HPD_PORT_TC2] = GEN11_TC_HOTPLUG(HPD_PORT_TC2) | GEN11_TBT_HOTPLUG(HPD_PORT_TC2), 158 [HPD_PORT_TC3] = GEN11_TC_HOTPLUG(HPD_PORT_TC3) | GEN11_TBT_HOTPLUG(HPD_PORT_TC3), 159 [HPD_PORT_TC4] = GEN11_TC_HOTPLUG(HPD_PORT_TC4) | GEN11_TBT_HOTPLUG(HPD_PORT_TC4), 160 [HPD_PORT_TC5] = GEN11_TC_HOTPLUG(HPD_PORT_TC5) | GEN11_TBT_HOTPLUG(HPD_PORT_TC5), 161 [HPD_PORT_TC6] = GEN11_TC_HOTPLUG(HPD_PORT_TC6) | GEN11_TBT_HOTPLUG(HPD_PORT_TC6), 162 }; 163 164 static const u32 hpd_icp[HPD_NUM_PINS] = { 165 [HPD_PORT_A] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_A), 166 [HPD_PORT_B] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_B), 167 [HPD_PORT_C] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_C), 168 [HPD_PORT_TC1] = SDE_TC_HOTPLUG_ICP(HPD_PORT_TC1), 169 [HPD_PORT_TC2] = SDE_TC_HOTPLUG_ICP(HPD_PORT_TC2), 170 [HPD_PORT_TC3] = SDE_TC_HOTPLUG_ICP(HPD_PORT_TC3), 171 [HPD_PORT_TC4] = SDE_TC_HOTPLUG_ICP(HPD_PORT_TC4), 172 [HPD_PORT_TC5] = SDE_TC_HOTPLUG_ICP(HPD_PORT_TC5), 173 [HPD_PORT_TC6] = SDE_TC_HOTPLUG_ICP(HPD_PORT_TC6), 174 }; 175 176 static const u32 hpd_sde_dg1[HPD_NUM_PINS] = { 177 [HPD_PORT_A] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_A), 178 [HPD_PORT_B] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_B), 179 [HPD_PORT_C] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_C), 180 [HPD_PORT_D] = SDE_DDI_HOTPLUG_ICP(HPD_PORT_D), 181 }; 182 183 static void intel_hpd_init_pins(struct drm_i915_private *dev_priv) 184 { 185 struct i915_hotplug *hpd = &dev_priv->hotplug; 186 187 if (HAS_GMCH(dev_priv)) { 188 if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) || 189 IS_CHERRYVIEW(dev_priv)) 190 hpd->hpd = hpd_status_g4x; 191 else 192 hpd->hpd = hpd_status_i915; 193 return; 194 } 195 196 if (DISPLAY_VER(dev_priv) >= 11) 197 hpd->hpd = hpd_gen11; 198 else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 199 hpd->hpd = hpd_bxt; 200 else if (DISPLAY_VER(dev_priv) >= 8) 201 hpd->hpd = hpd_bdw; 202 else if (DISPLAY_VER(dev_priv) >= 7) 203 hpd->hpd = hpd_ivb; 204 else 205 hpd->hpd = hpd_ilk; 206 207 if ((INTEL_PCH_TYPE(dev_priv) < PCH_DG1) && 208 (!HAS_PCH_SPLIT(dev_priv) || HAS_PCH_NOP(dev_priv))) 209 return; 210 211 if (HAS_PCH_DG1(dev_priv)) 212 hpd->pch_hpd = hpd_sde_dg1; 213 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 214 hpd->pch_hpd = hpd_icp; 215 else if (HAS_PCH_CNP(dev_priv) || HAS_PCH_SPT(dev_priv)) 216 hpd->pch_hpd = hpd_spt; 217 else if (HAS_PCH_LPT(dev_priv) || HAS_PCH_CPT(dev_priv)) 218 hpd->pch_hpd = hpd_cpt; 219 else if (HAS_PCH_IBX(dev_priv)) 220 hpd->pch_hpd = hpd_ibx; 221 else 222 MISSING_CASE(INTEL_PCH_TYPE(dev_priv)); 223 } 224 225 static void 226 intel_handle_vblank(struct drm_i915_private *dev_priv, enum pipe pipe) 227 { 228 struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe); 229 230 drm_crtc_handle_vblank(&crtc->base); 231 } 232 233 void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr, 234 i915_reg_t iir, i915_reg_t ier) 235 { 236 intel_uncore_write(uncore, imr, 0xffffffff); 237 intel_uncore_posting_read(uncore, imr); 238 239 intel_uncore_write(uncore, ier, 0); 240 241 /* IIR can theoretically queue up two events. Be paranoid. */ 242 intel_uncore_write(uncore, iir, 0xffffffff); 243 intel_uncore_posting_read(uncore, iir); 244 intel_uncore_write(uncore, iir, 0xffffffff); 245 intel_uncore_posting_read(uncore, iir); 246 } 247 248 void gen2_irq_reset(struct intel_uncore *uncore) 249 { 250 intel_uncore_write16(uncore, GEN2_IMR, 0xffff); 251 intel_uncore_posting_read16(uncore, GEN2_IMR); 252 253 intel_uncore_write16(uncore, GEN2_IER, 0); 254 255 /* IIR can theoretically queue up two events. Be paranoid. */ 256 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 257 intel_uncore_posting_read16(uncore, GEN2_IIR); 258 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 259 intel_uncore_posting_read16(uncore, GEN2_IIR); 260 } 261 262 /* 263 * We should clear IMR at preinstall/uninstall, and just check at postinstall. 264 */ 265 static void gen3_assert_iir_is_zero(struct intel_uncore *uncore, i915_reg_t reg) 266 { 267 u32 val = intel_uncore_read(uncore, reg); 268 269 if (val == 0) 270 return; 271 272 drm_WARN(&uncore->i915->drm, 1, 273 "Interrupt register 0x%x is not zero: 0x%08x\n", 274 i915_mmio_reg_offset(reg), val); 275 intel_uncore_write(uncore, reg, 0xffffffff); 276 intel_uncore_posting_read(uncore, reg); 277 intel_uncore_write(uncore, reg, 0xffffffff); 278 intel_uncore_posting_read(uncore, reg); 279 } 280 281 static void gen2_assert_iir_is_zero(struct intel_uncore *uncore) 282 { 283 u16 val = intel_uncore_read16(uncore, GEN2_IIR); 284 285 if (val == 0) 286 return; 287 288 drm_WARN(&uncore->i915->drm, 1, 289 "Interrupt register 0x%x is not zero: 0x%08x\n", 290 i915_mmio_reg_offset(GEN2_IIR), val); 291 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 292 intel_uncore_posting_read16(uncore, GEN2_IIR); 293 intel_uncore_write16(uncore, GEN2_IIR, 0xffff); 294 intel_uncore_posting_read16(uncore, GEN2_IIR); 295 } 296 297 void gen3_irq_init(struct intel_uncore *uncore, 298 i915_reg_t imr, u32 imr_val, 299 i915_reg_t ier, u32 ier_val, 300 i915_reg_t iir) 301 { 302 gen3_assert_iir_is_zero(uncore, iir); 303 304 intel_uncore_write(uncore, ier, ier_val); 305 intel_uncore_write(uncore, imr, imr_val); 306 intel_uncore_posting_read(uncore, imr); 307 } 308 309 void gen2_irq_init(struct intel_uncore *uncore, 310 u32 imr_val, u32 ier_val) 311 { 312 gen2_assert_iir_is_zero(uncore); 313 314 intel_uncore_write16(uncore, GEN2_IER, ier_val); 315 intel_uncore_write16(uncore, GEN2_IMR, imr_val); 316 intel_uncore_posting_read16(uncore, GEN2_IMR); 317 } 318 319 /* For display hotplug interrupt */ 320 static inline void 321 i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv, 322 u32 mask, 323 u32 bits) 324 { 325 u32 val; 326 327 lockdep_assert_held(&dev_priv->irq_lock); 328 drm_WARN_ON(&dev_priv->drm, bits & ~mask); 329 330 val = intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_EN); 331 val &= ~mask; 332 val |= bits; 333 intel_uncore_write(&dev_priv->uncore, PORT_HOTPLUG_EN, val); 334 } 335 336 /** 337 * i915_hotplug_interrupt_update - update hotplug interrupt enable 338 * @dev_priv: driver private 339 * @mask: bits to update 340 * @bits: bits to enable 341 * NOTE: the HPD enable bits are modified both inside and outside 342 * of an interrupt context. To avoid that read-modify-write cycles 343 * interfer, these bits are protected by a spinlock. Since this 344 * function is usually not called from a context where the lock is 345 * held already, this function acquires the lock itself. A non-locking 346 * version is also available. 347 */ 348 void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv, 349 u32 mask, 350 u32 bits) 351 { 352 spin_lock_irq(&dev_priv->irq_lock); 353 i915_hotplug_interrupt_update_locked(dev_priv, mask, bits); 354 spin_unlock_irq(&dev_priv->irq_lock); 355 } 356 357 /** 358 * ilk_update_display_irq - update DEIMR 359 * @dev_priv: driver private 360 * @interrupt_mask: mask of interrupt bits to update 361 * @enabled_irq_mask: mask of interrupt bits to enable 362 */ 363 void ilk_update_display_irq(struct drm_i915_private *dev_priv, 364 u32 interrupt_mask, 365 u32 enabled_irq_mask) 366 { 367 u32 new_val; 368 369 lockdep_assert_held(&dev_priv->irq_lock); 370 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask); 371 372 new_val = dev_priv->irq_mask; 373 new_val &= ~interrupt_mask; 374 new_val |= (~enabled_irq_mask & interrupt_mask); 375 376 if (new_val != dev_priv->irq_mask && 377 !drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv))) { 378 dev_priv->irq_mask = new_val; 379 intel_uncore_write(&dev_priv->uncore, DEIMR, dev_priv->irq_mask); 380 intel_uncore_posting_read(&dev_priv->uncore, DEIMR); 381 } 382 } 383 384 /** 385 * bdw_update_port_irq - update DE port interrupt 386 * @dev_priv: driver private 387 * @interrupt_mask: mask of interrupt bits to update 388 * @enabled_irq_mask: mask of interrupt bits to enable 389 */ 390 static void bdw_update_port_irq(struct drm_i915_private *dev_priv, 391 u32 interrupt_mask, 392 u32 enabled_irq_mask) 393 { 394 u32 new_val; 395 u32 old_val; 396 397 lockdep_assert_held(&dev_priv->irq_lock); 398 399 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask); 400 401 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv))) 402 return; 403 404 old_val = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PORT_IMR); 405 406 new_val = old_val; 407 new_val &= ~interrupt_mask; 408 new_val |= (~enabled_irq_mask & interrupt_mask); 409 410 if (new_val != old_val) { 411 intel_uncore_write(&dev_priv->uncore, GEN8_DE_PORT_IMR, new_val); 412 intel_uncore_posting_read(&dev_priv->uncore, GEN8_DE_PORT_IMR); 413 } 414 } 415 416 /** 417 * bdw_update_pipe_irq - update DE pipe interrupt 418 * @dev_priv: driver private 419 * @pipe: pipe whose interrupt to update 420 * @interrupt_mask: mask of interrupt bits to update 421 * @enabled_irq_mask: mask of interrupt bits to enable 422 */ 423 void bdw_update_pipe_irq(struct drm_i915_private *dev_priv, 424 enum pipe pipe, 425 u32 interrupt_mask, 426 u32 enabled_irq_mask) 427 { 428 u32 new_val; 429 430 lockdep_assert_held(&dev_priv->irq_lock); 431 432 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask); 433 434 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv))) 435 return; 436 437 new_val = dev_priv->de_irq_mask[pipe]; 438 new_val &= ~interrupt_mask; 439 new_val |= (~enabled_irq_mask & interrupt_mask); 440 441 if (new_val != dev_priv->de_irq_mask[pipe]) { 442 dev_priv->de_irq_mask[pipe] = new_val; 443 intel_uncore_write(&dev_priv->uncore, GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]); 444 intel_uncore_posting_read(&dev_priv->uncore, GEN8_DE_PIPE_IMR(pipe)); 445 } 446 } 447 448 /** 449 * ibx_display_interrupt_update - update SDEIMR 450 * @dev_priv: driver private 451 * @interrupt_mask: mask of interrupt bits to update 452 * @enabled_irq_mask: mask of interrupt bits to enable 453 */ 454 void ibx_display_interrupt_update(struct drm_i915_private *dev_priv, 455 u32 interrupt_mask, 456 u32 enabled_irq_mask) 457 { 458 u32 sdeimr = intel_uncore_read(&dev_priv->uncore, SDEIMR); 459 sdeimr &= ~interrupt_mask; 460 sdeimr |= (~enabled_irq_mask & interrupt_mask); 461 462 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask); 463 464 lockdep_assert_held(&dev_priv->irq_lock); 465 466 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv))) 467 return; 468 469 intel_uncore_write(&dev_priv->uncore, SDEIMR, sdeimr); 470 intel_uncore_posting_read(&dev_priv->uncore, SDEIMR); 471 } 472 473 u32 i915_pipestat_enable_mask(struct drm_i915_private *dev_priv, 474 enum pipe pipe) 475 { 476 u32 status_mask = dev_priv->pipestat_irq_mask[pipe]; 477 u32 enable_mask = status_mask << 16; 478 479 lockdep_assert_held(&dev_priv->irq_lock); 480 481 if (DISPLAY_VER(dev_priv) < 5) 482 goto out; 483 484 /* 485 * On pipe A we don't support the PSR interrupt yet, 486 * on pipe B and C the same bit MBZ. 487 */ 488 if (drm_WARN_ON_ONCE(&dev_priv->drm, 489 status_mask & PIPE_A_PSR_STATUS_VLV)) 490 return 0; 491 /* 492 * On pipe B and C we don't support the PSR interrupt yet, on pipe 493 * A the same bit is for perf counters which we don't use either. 494 */ 495 if (drm_WARN_ON_ONCE(&dev_priv->drm, 496 status_mask & PIPE_B_PSR_STATUS_VLV)) 497 return 0; 498 499 enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS | 500 SPRITE0_FLIP_DONE_INT_EN_VLV | 501 SPRITE1_FLIP_DONE_INT_EN_VLV); 502 if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV) 503 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV; 504 if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV) 505 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV; 506 507 out: 508 drm_WARN_ONCE(&dev_priv->drm, 509 enable_mask & ~PIPESTAT_INT_ENABLE_MASK || 510 status_mask & ~PIPESTAT_INT_STATUS_MASK, 511 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n", 512 pipe_name(pipe), enable_mask, status_mask); 513 514 return enable_mask; 515 } 516 517 void i915_enable_pipestat(struct drm_i915_private *dev_priv, 518 enum pipe pipe, u32 status_mask) 519 { 520 i915_reg_t reg = PIPESTAT(pipe); 521 u32 enable_mask; 522 523 drm_WARN_ONCE(&dev_priv->drm, status_mask & ~PIPESTAT_INT_STATUS_MASK, 524 "pipe %c: status_mask=0x%x\n", 525 pipe_name(pipe), status_mask); 526 527 lockdep_assert_held(&dev_priv->irq_lock); 528 drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)); 529 530 if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == status_mask) 531 return; 532 533 dev_priv->pipestat_irq_mask[pipe] |= status_mask; 534 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe); 535 536 intel_uncore_write(&dev_priv->uncore, reg, enable_mask | status_mask); 537 intel_uncore_posting_read(&dev_priv->uncore, reg); 538 } 539 540 void i915_disable_pipestat(struct drm_i915_private *dev_priv, 541 enum pipe pipe, u32 status_mask) 542 { 543 i915_reg_t reg = PIPESTAT(pipe); 544 u32 enable_mask; 545 546 drm_WARN_ONCE(&dev_priv->drm, status_mask & ~PIPESTAT_INT_STATUS_MASK, 547 "pipe %c: status_mask=0x%x\n", 548 pipe_name(pipe), status_mask); 549 550 lockdep_assert_held(&dev_priv->irq_lock); 551 drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)); 552 553 if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == 0) 554 return; 555 556 dev_priv->pipestat_irq_mask[pipe] &= ~status_mask; 557 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe); 558 559 intel_uncore_write(&dev_priv->uncore, reg, enable_mask | status_mask); 560 intel_uncore_posting_read(&dev_priv->uncore, reg); 561 } 562 563 static bool i915_has_asle(struct drm_i915_private *dev_priv) 564 { 565 if (!dev_priv->opregion.asle) 566 return false; 567 568 return IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv); 569 } 570 571 /** 572 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion 573 * @dev_priv: i915 device private 574 */ 575 static void i915_enable_asle_pipestat(struct drm_i915_private *dev_priv) 576 { 577 if (!i915_has_asle(dev_priv)) 578 return; 579 580 spin_lock_irq(&dev_priv->irq_lock); 581 582 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS); 583 if (DISPLAY_VER(dev_priv) >= 4) 584 i915_enable_pipestat(dev_priv, PIPE_A, 585 PIPE_LEGACY_BLC_EVENT_STATUS); 586 587 spin_unlock_irq(&dev_priv->irq_lock); 588 } 589 590 /* 591 * This timing diagram depicts the video signal in and 592 * around the vertical blanking period. 593 * 594 * Assumptions about the fictitious mode used in this example: 595 * vblank_start >= 3 596 * vsync_start = vblank_start + 1 597 * vsync_end = vblank_start + 2 598 * vtotal = vblank_start + 3 599 * 600 * start of vblank: 601 * latch double buffered registers 602 * increment frame counter (ctg+) 603 * generate start of vblank interrupt (gen4+) 604 * | 605 * | frame start: 606 * | generate frame start interrupt (aka. vblank interrupt) (gmch) 607 * | may be shifted forward 1-3 extra lines via PIPECONF 608 * | | 609 * | | start of vsync: 610 * | | generate vsync interrupt 611 * | | | 612 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx 613 * . \hs/ . \hs/ \hs/ \hs/ . \hs/ 614 * ----va---> <-----------------vb--------------------> <--------va------------- 615 * | | <----vs-----> | 616 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2) 617 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+) 618 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi) 619 * | | | 620 * last visible pixel first visible pixel 621 * | increment frame counter (gen3/4) 622 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4) 623 * 624 * x = horizontal active 625 * _ = horizontal blanking 626 * hs = horizontal sync 627 * va = vertical active 628 * vb = vertical blanking 629 * vs = vertical sync 630 * vbs = vblank_start (number) 631 * 632 * Summary: 633 * - most events happen at the start of horizontal sync 634 * - frame start happens at the start of horizontal blank, 1-4 lines 635 * (depending on PIPECONF settings) after the start of vblank 636 * - gen3/4 pixel and frame counter are synchronized with the start 637 * of horizontal active on the first line of vertical active 638 */ 639 640 /* Called from drm generic code, passed a 'crtc', which 641 * we use as a pipe index 642 */ 643 u32 i915_get_vblank_counter(struct drm_crtc *crtc) 644 { 645 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 646 struct drm_vblank_crtc *vblank = &dev_priv->drm.vblank[drm_crtc_index(crtc)]; 647 const struct drm_display_mode *mode = &vblank->hwmode; 648 enum pipe pipe = to_intel_crtc(crtc)->pipe; 649 i915_reg_t high_frame, low_frame; 650 u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal; 651 unsigned long irqflags; 652 653 /* 654 * On i965gm TV output the frame counter only works up to 655 * the point when we enable the TV encoder. After that the 656 * frame counter ceases to work and reads zero. We need a 657 * vblank wait before enabling the TV encoder and so we 658 * have to enable vblank interrupts while the frame counter 659 * is still in a working state. However the core vblank code 660 * does not like us returning non-zero frame counter values 661 * when we've told it that we don't have a working frame 662 * counter. Thus we must stop non-zero values leaking out. 663 */ 664 if (!vblank->max_vblank_count) 665 return 0; 666 667 htotal = mode->crtc_htotal; 668 hsync_start = mode->crtc_hsync_start; 669 vbl_start = mode->crtc_vblank_start; 670 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 671 vbl_start = DIV_ROUND_UP(vbl_start, 2); 672 673 /* Convert to pixel count */ 674 vbl_start *= htotal; 675 676 /* Start of vblank event occurs at start of hsync */ 677 vbl_start -= htotal - hsync_start; 678 679 high_frame = PIPEFRAME(pipe); 680 low_frame = PIPEFRAMEPIXEL(pipe); 681 682 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); 683 684 /* 685 * High & low register fields aren't synchronized, so make sure 686 * we get a low value that's stable across two reads of the high 687 * register. 688 */ 689 do { 690 high1 = intel_de_read_fw(dev_priv, high_frame) & PIPE_FRAME_HIGH_MASK; 691 low = intel_de_read_fw(dev_priv, low_frame); 692 high2 = intel_de_read_fw(dev_priv, high_frame) & PIPE_FRAME_HIGH_MASK; 693 } while (high1 != high2); 694 695 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); 696 697 high1 >>= PIPE_FRAME_HIGH_SHIFT; 698 pixel = low & PIPE_PIXEL_MASK; 699 low >>= PIPE_FRAME_LOW_SHIFT; 700 701 /* 702 * The frame counter increments at beginning of active. 703 * Cook up a vblank counter by also checking the pixel 704 * counter against vblank start. 705 */ 706 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff; 707 } 708 709 u32 g4x_get_vblank_counter(struct drm_crtc *crtc) 710 { 711 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 712 struct drm_vblank_crtc *vblank = &dev_priv->drm.vblank[drm_crtc_index(crtc)]; 713 enum pipe pipe = to_intel_crtc(crtc)->pipe; 714 715 if (!vblank->max_vblank_count) 716 return 0; 717 718 return intel_uncore_read(&dev_priv->uncore, PIPE_FRMCOUNT_G4X(pipe)); 719 } 720 721 static u32 intel_crtc_scanlines_since_frame_timestamp(struct intel_crtc *crtc) 722 { 723 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); 724 struct drm_vblank_crtc *vblank = 725 &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)]; 726 const struct drm_display_mode *mode = &vblank->hwmode; 727 u32 htotal = mode->crtc_htotal; 728 u32 clock = mode->crtc_clock; 729 u32 scan_prev_time, scan_curr_time, scan_post_time; 730 731 /* 732 * To avoid the race condition where we might cross into the 733 * next vblank just between the PIPE_FRMTMSTMP and TIMESTAMP_CTR 734 * reads. We make sure we read PIPE_FRMTMSTMP and TIMESTAMP_CTR 735 * during the same frame. 736 */ 737 do { 738 /* 739 * This field provides read back of the display 740 * pipe frame time stamp. The time stamp value 741 * is sampled at every start of vertical blank. 742 */ 743 scan_prev_time = intel_de_read_fw(dev_priv, 744 PIPE_FRMTMSTMP(crtc->pipe)); 745 746 /* 747 * The TIMESTAMP_CTR register has the current 748 * time stamp value. 749 */ 750 scan_curr_time = intel_de_read_fw(dev_priv, IVB_TIMESTAMP_CTR); 751 752 scan_post_time = intel_de_read_fw(dev_priv, 753 PIPE_FRMTMSTMP(crtc->pipe)); 754 } while (scan_post_time != scan_prev_time); 755 756 return div_u64(mul_u32_u32(scan_curr_time - scan_prev_time, 757 clock), 1000 * htotal); 758 } 759 760 /* 761 * On certain encoders on certain platforms, pipe 762 * scanline register will not work to get the scanline, 763 * since the timings are driven from the PORT or issues 764 * with scanline register updates. 765 * This function will use Framestamp and current 766 * timestamp registers to calculate the scanline. 767 */ 768 static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc) 769 { 770 struct drm_vblank_crtc *vblank = 771 &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)]; 772 const struct drm_display_mode *mode = &vblank->hwmode; 773 u32 vblank_start = mode->crtc_vblank_start; 774 u32 vtotal = mode->crtc_vtotal; 775 u32 scanline; 776 777 scanline = intel_crtc_scanlines_since_frame_timestamp(crtc); 778 scanline = min(scanline, vtotal - 1); 779 scanline = (scanline + vblank_start) % vtotal; 780 781 return scanline; 782 } 783 784 /* 785 * intel_de_read_fw(), only for fast reads of display block, no need for 786 * forcewake etc. 787 */ 788 static int __intel_get_crtc_scanline(struct intel_crtc *crtc) 789 { 790 struct drm_device *dev = crtc->base.dev; 791 struct drm_i915_private *dev_priv = to_i915(dev); 792 const struct drm_display_mode *mode; 793 struct drm_vblank_crtc *vblank; 794 enum pipe pipe = crtc->pipe; 795 int position, vtotal; 796 797 if (!crtc->active) 798 return 0; 799 800 vblank = &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)]; 801 mode = &vblank->hwmode; 802 803 if (crtc->mode_flags & I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP) 804 return __intel_get_crtc_scanline_from_timestamp(crtc); 805 806 vtotal = mode->crtc_vtotal; 807 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 808 vtotal /= 2; 809 810 if (DISPLAY_VER(dev_priv) == 2) 811 position = intel_de_read_fw(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2; 812 else 813 position = intel_de_read_fw(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3; 814 815 /* 816 * On HSW, the DSL reg (0x70000) appears to return 0 if we 817 * read it just before the start of vblank. So try it again 818 * so we don't accidentally end up spanning a vblank frame 819 * increment, causing the pipe_update_end() code to squak at us. 820 * 821 * The nature of this problem means we can't simply check the ISR 822 * bit and return the vblank start value; nor can we use the scanline 823 * debug register in the transcoder as it appears to have the same 824 * problem. We may need to extend this to include other platforms, 825 * but so far testing only shows the problem on HSW. 826 */ 827 if (HAS_DDI(dev_priv) && !position) { 828 int i, temp; 829 830 for (i = 0; i < 100; i++) { 831 udelay(1); 832 temp = intel_de_read_fw(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3; 833 if (temp != position) { 834 position = temp; 835 break; 836 } 837 } 838 } 839 840 /* 841 * See update_scanline_offset() for the details on the 842 * scanline_offset adjustment. 843 */ 844 return (position + crtc->scanline_offset) % vtotal; 845 } 846 847 static bool i915_get_crtc_scanoutpos(struct drm_crtc *_crtc, 848 bool in_vblank_irq, 849 int *vpos, int *hpos, 850 ktime_t *stime, ktime_t *etime, 851 const struct drm_display_mode *mode) 852 { 853 struct drm_device *dev = _crtc->dev; 854 struct drm_i915_private *dev_priv = to_i915(dev); 855 struct intel_crtc *crtc = to_intel_crtc(_crtc); 856 enum pipe pipe = crtc->pipe; 857 int position; 858 int vbl_start, vbl_end, hsync_start, htotal, vtotal; 859 unsigned long irqflags; 860 bool use_scanline_counter = DISPLAY_VER(dev_priv) >= 5 || 861 IS_G4X(dev_priv) || DISPLAY_VER(dev_priv) == 2 || 862 crtc->mode_flags & I915_MODE_FLAG_USE_SCANLINE_COUNTER; 863 864 if (drm_WARN_ON(&dev_priv->drm, !mode->crtc_clock)) { 865 drm_dbg(&dev_priv->drm, 866 "trying to get scanoutpos for disabled " 867 "pipe %c\n", pipe_name(pipe)); 868 return false; 869 } 870 871 htotal = mode->crtc_htotal; 872 hsync_start = mode->crtc_hsync_start; 873 vtotal = mode->crtc_vtotal; 874 vbl_start = mode->crtc_vblank_start; 875 vbl_end = mode->crtc_vblank_end; 876 877 if (mode->flags & DRM_MODE_FLAG_INTERLACE) { 878 vbl_start = DIV_ROUND_UP(vbl_start, 2); 879 vbl_end /= 2; 880 vtotal /= 2; 881 } 882 883 /* 884 * Lock uncore.lock, as we will do multiple timing critical raw 885 * register reads, potentially with preemption disabled, so the 886 * following code must not block on uncore.lock. 887 */ 888 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); 889 890 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ 891 892 /* Get optional system timestamp before query. */ 893 if (stime) 894 *stime = ktime_get(); 895 896 if (crtc->mode_flags & I915_MODE_FLAG_VRR) { 897 int scanlines = intel_crtc_scanlines_since_frame_timestamp(crtc); 898 899 position = __intel_get_crtc_scanline(crtc); 900 901 /* 902 * Already exiting vblank? If so, shift our position 903 * so it looks like we're already apporaching the full 904 * vblank end. This should make the generated timestamp 905 * more or less match when the active portion will start. 906 */ 907 if (position >= vbl_start && scanlines < position) 908 position = min(crtc->vmax_vblank_start + scanlines, vtotal - 1); 909 } else if (use_scanline_counter) { 910 /* No obvious pixelcount register. Only query vertical 911 * scanout position from Display scan line register. 912 */ 913 position = __intel_get_crtc_scanline(crtc); 914 } else { 915 /* Have access to pixelcount since start of frame. 916 * We can split this into vertical and horizontal 917 * scanout position. 918 */ 919 position = (intel_de_read_fw(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT; 920 921 /* convert to pixel counts */ 922 vbl_start *= htotal; 923 vbl_end *= htotal; 924 vtotal *= htotal; 925 926 /* 927 * In interlaced modes, the pixel counter counts all pixels, 928 * so one field will have htotal more pixels. In order to avoid 929 * the reported position from jumping backwards when the pixel 930 * counter is beyond the length of the shorter field, just 931 * clamp the position the length of the shorter field. This 932 * matches how the scanline counter based position works since 933 * the scanline counter doesn't count the two half lines. 934 */ 935 if (position >= vtotal) 936 position = vtotal - 1; 937 938 /* 939 * Start of vblank interrupt is triggered at start of hsync, 940 * just prior to the first active line of vblank. However we 941 * consider lines to start at the leading edge of horizontal 942 * active. So, should we get here before we've crossed into 943 * the horizontal active of the first line in vblank, we would 944 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that, 945 * always add htotal-hsync_start to the current pixel position. 946 */ 947 position = (position + htotal - hsync_start) % vtotal; 948 } 949 950 /* Get optional system timestamp after query. */ 951 if (etime) 952 *etime = ktime_get(); 953 954 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ 955 956 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); 957 958 /* 959 * While in vblank, position will be negative 960 * counting up towards 0 at vbl_end. And outside 961 * vblank, position will be positive counting 962 * up since vbl_end. 963 */ 964 if (position >= vbl_start) 965 position -= vbl_end; 966 else 967 position += vtotal - vbl_end; 968 969 if (use_scanline_counter) { 970 *vpos = position; 971 *hpos = 0; 972 } else { 973 *vpos = position / htotal; 974 *hpos = position - (*vpos * htotal); 975 } 976 977 return true; 978 } 979 980 bool intel_crtc_get_vblank_timestamp(struct drm_crtc *crtc, int *max_error, 981 ktime_t *vblank_time, bool in_vblank_irq) 982 { 983 return drm_crtc_vblank_helper_get_vblank_timestamp_internal( 984 crtc, max_error, vblank_time, in_vblank_irq, 985 i915_get_crtc_scanoutpos); 986 } 987 988 int intel_get_crtc_scanline(struct intel_crtc *crtc) 989 { 990 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); 991 unsigned long irqflags; 992 int position; 993 994 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); 995 position = __intel_get_crtc_scanline(crtc); 996 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); 997 998 return position; 999 } 1000 1001 /** 1002 * ivb_parity_work - Workqueue called when a parity error interrupt 1003 * occurred. 1004 * @work: workqueue struct 1005 * 1006 * Doesn't actually do anything except notify userspace. As a consequence of 1007 * this event, userspace should try to remap the bad rows since statistically 1008 * it is likely the same row is more likely to go bad again. 1009 */ 1010 static void ivb_parity_work(struct work_struct *work) 1011 { 1012 struct drm_i915_private *dev_priv = 1013 container_of(work, typeof(*dev_priv), l3_parity.error_work); 1014 struct intel_gt *gt = &dev_priv->gt; 1015 u32 error_status, row, bank, subbank; 1016 char *parity_event[6]; 1017 u32 misccpctl; 1018 u8 slice = 0; 1019 1020 /* We must turn off DOP level clock gating to access the L3 registers. 1021 * In order to prevent a get/put style interface, acquire struct mutex 1022 * any time we access those registers. 1023 */ 1024 mutex_lock(&dev_priv->drm.struct_mutex); 1025 1026 /* If we've screwed up tracking, just let the interrupt fire again */ 1027 if (drm_WARN_ON(&dev_priv->drm, !dev_priv->l3_parity.which_slice)) 1028 goto out; 1029 1030 misccpctl = intel_uncore_read(&dev_priv->uncore, GEN7_MISCCPCTL); 1031 intel_uncore_write(&dev_priv->uncore, GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); 1032 intel_uncore_posting_read(&dev_priv->uncore, GEN7_MISCCPCTL); 1033 1034 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) { 1035 i915_reg_t reg; 1036 1037 slice--; 1038 if (drm_WARN_ON_ONCE(&dev_priv->drm, 1039 slice >= NUM_L3_SLICES(dev_priv))) 1040 break; 1041 1042 dev_priv->l3_parity.which_slice &= ~(1<<slice); 1043 1044 reg = GEN7_L3CDERRST1(slice); 1045 1046 error_status = intel_uncore_read(&dev_priv->uncore, reg); 1047 row = GEN7_PARITY_ERROR_ROW(error_status); 1048 bank = GEN7_PARITY_ERROR_BANK(error_status); 1049 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status); 1050 1051 intel_uncore_write(&dev_priv->uncore, reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE); 1052 intel_uncore_posting_read(&dev_priv->uncore, reg); 1053 1054 parity_event[0] = I915_L3_PARITY_UEVENT "=1"; 1055 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row); 1056 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank); 1057 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank); 1058 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice); 1059 parity_event[5] = NULL; 1060 1061 kobject_uevent_env(&dev_priv->drm.primary->kdev->kobj, 1062 KOBJ_CHANGE, parity_event); 1063 1064 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n", 1065 slice, row, bank, subbank); 1066 1067 kfree(parity_event[4]); 1068 kfree(parity_event[3]); 1069 kfree(parity_event[2]); 1070 kfree(parity_event[1]); 1071 } 1072 1073 intel_uncore_write(&dev_priv->uncore, GEN7_MISCCPCTL, misccpctl); 1074 1075 out: 1076 drm_WARN_ON(&dev_priv->drm, dev_priv->l3_parity.which_slice); 1077 spin_lock_irq(>->irq_lock); 1078 gen5_gt_enable_irq(gt, GT_PARITY_ERROR(dev_priv)); 1079 spin_unlock_irq(>->irq_lock); 1080 1081 mutex_unlock(&dev_priv->drm.struct_mutex); 1082 } 1083 1084 static bool gen11_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1085 { 1086 switch (pin) { 1087 case HPD_PORT_TC1: 1088 case HPD_PORT_TC2: 1089 case HPD_PORT_TC3: 1090 case HPD_PORT_TC4: 1091 case HPD_PORT_TC5: 1092 case HPD_PORT_TC6: 1093 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(pin); 1094 default: 1095 return false; 1096 } 1097 } 1098 1099 static bool bxt_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1100 { 1101 switch (pin) { 1102 case HPD_PORT_A: 1103 return val & PORTA_HOTPLUG_LONG_DETECT; 1104 case HPD_PORT_B: 1105 return val & PORTB_HOTPLUG_LONG_DETECT; 1106 case HPD_PORT_C: 1107 return val & PORTC_HOTPLUG_LONG_DETECT; 1108 default: 1109 return false; 1110 } 1111 } 1112 1113 static bool icp_ddi_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1114 { 1115 switch (pin) { 1116 case HPD_PORT_A: 1117 case HPD_PORT_B: 1118 case HPD_PORT_C: 1119 case HPD_PORT_D: 1120 return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(pin); 1121 default: 1122 return false; 1123 } 1124 } 1125 1126 static bool icp_tc_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1127 { 1128 switch (pin) { 1129 case HPD_PORT_TC1: 1130 case HPD_PORT_TC2: 1131 case HPD_PORT_TC3: 1132 case HPD_PORT_TC4: 1133 case HPD_PORT_TC5: 1134 case HPD_PORT_TC6: 1135 return val & ICP_TC_HPD_LONG_DETECT(pin); 1136 default: 1137 return false; 1138 } 1139 } 1140 1141 static bool spt_port_hotplug2_long_detect(enum hpd_pin pin, u32 val) 1142 { 1143 switch (pin) { 1144 case HPD_PORT_E: 1145 return val & PORTE_HOTPLUG_LONG_DETECT; 1146 default: 1147 return false; 1148 } 1149 } 1150 1151 static bool spt_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1152 { 1153 switch (pin) { 1154 case HPD_PORT_A: 1155 return val & PORTA_HOTPLUG_LONG_DETECT; 1156 case HPD_PORT_B: 1157 return val & PORTB_HOTPLUG_LONG_DETECT; 1158 case HPD_PORT_C: 1159 return val & PORTC_HOTPLUG_LONG_DETECT; 1160 case HPD_PORT_D: 1161 return val & PORTD_HOTPLUG_LONG_DETECT; 1162 default: 1163 return false; 1164 } 1165 } 1166 1167 static bool ilk_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1168 { 1169 switch (pin) { 1170 case HPD_PORT_A: 1171 return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT; 1172 default: 1173 return false; 1174 } 1175 } 1176 1177 static bool pch_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1178 { 1179 switch (pin) { 1180 case HPD_PORT_B: 1181 return val & PORTB_HOTPLUG_LONG_DETECT; 1182 case HPD_PORT_C: 1183 return val & PORTC_HOTPLUG_LONG_DETECT; 1184 case HPD_PORT_D: 1185 return val & PORTD_HOTPLUG_LONG_DETECT; 1186 default: 1187 return false; 1188 } 1189 } 1190 1191 static bool i9xx_port_hotplug_long_detect(enum hpd_pin pin, u32 val) 1192 { 1193 switch (pin) { 1194 case HPD_PORT_B: 1195 return val & PORTB_HOTPLUG_INT_LONG_PULSE; 1196 case HPD_PORT_C: 1197 return val & PORTC_HOTPLUG_INT_LONG_PULSE; 1198 case HPD_PORT_D: 1199 return val & PORTD_HOTPLUG_INT_LONG_PULSE; 1200 default: 1201 return false; 1202 } 1203 } 1204 1205 /* 1206 * Get a bit mask of pins that have triggered, and which ones may be long. 1207 * This can be called multiple times with the same masks to accumulate 1208 * hotplug detection results from several registers. 1209 * 1210 * Note that the caller is expected to zero out the masks initially. 1211 */ 1212 static void intel_get_hpd_pins(struct drm_i915_private *dev_priv, 1213 u32 *pin_mask, u32 *long_mask, 1214 u32 hotplug_trigger, u32 dig_hotplug_reg, 1215 const u32 hpd[HPD_NUM_PINS], 1216 bool long_pulse_detect(enum hpd_pin pin, u32 val)) 1217 { 1218 enum hpd_pin pin; 1219 1220 BUILD_BUG_ON(BITS_PER_TYPE(*pin_mask) < HPD_NUM_PINS); 1221 1222 for_each_hpd_pin(pin) { 1223 if ((hpd[pin] & hotplug_trigger) == 0) 1224 continue; 1225 1226 *pin_mask |= BIT(pin); 1227 1228 if (long_pulse_detect(pin, dig_hotplug_reg)) 1229 *long_mask |= BIT(pin); 1230 } 1231 1232 drm_dbg(&dev_priv->drm, 1233 "hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x, long 0x%08x\n", 1234 hotplug_trigger, dig_hotplug_reg, *pin_mask, *long_mask); 1235 1236 } 1237 1238 static u32 intel_hpd_enabled_irqs(struct drm_i915_private *dev_priv, 1239 const u32 hpd[HPD_NUM_PINS]) 1240 { 1241 struct intel_encoder *encoder; 1242 u32 enabled_irqs = 0; 1243 1244 for_each_intel_encoder(&dev_priv->drm, encoder) 1245 if (dev_priv->hotplug.stats[encoder->hpd_pin].state == HPD_ENABLED) 1246 enabled_irqs |= hpd[encoder->hpd_pin]; 1247 1248 return enabled_irqs; 1249 } 1250 1251 static u32 intel_hpd_hotplug_irqs(struct drm_i915_private *dev_priv, 1252 const u32 hpd[HPD_NUM_PINS]) 1253 { 1254 struct intel_encoder *encoder; 1255 u32 hotplug_irqs = 0; 1256 1257 for_each_intel_encoder(&dev_priv->drm, encoder) 1258 hotplug_irqs |= hpd[encoder->hpd_pin]; 1259 1260 return hotplug_irqs; 1261 } 1262 1263 static u32 intel_hpd_hotplug_enables(struct drm_i915_private *i915, 1264 hotplug_enables_func hotplug_enables) 1265 { 1266 struct intel_encoder *encoder; 1267 u32 hotplug = 0; 1268 1269 for_each_intel_encoder(&i915->drm, encoder) 1270 hotplug |= hotplug_enables(i915, encoder->hpd_pin); 1271 1272 return hotplug; 1273 } 1274 1275 static void gmbus_irq_handler(struct drm_i915_private *dev_priv) 1276 { 1277 wake_up_all(&dev_priv->gmbus_wait_queue); 1278 } 1279 1280 static void dp_aux_irq_handler(struct drm_i915_private *dev_priv) 1281 { 1282 wake_up_all(&dev_priv->gmbus_wait_queue); 1283 } 1284 1285 #if defined(CONFIG_DEBUG_FS) 1286 static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv, 1287 enum pipe pipe, 1288 u32 crc0, u32 crc1, 1289 u32 crc2, u32 crc3, 1290 u32 crc4) 1291 { 1292 struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe); 1293 struct intel_pipe_crc *pipe_crc = &crtc->pipe_crc; 1294 u32 crcs[5] = { crc0, crc1, crc2, crc3, crc4 }; 1295 1296 trace_intel_pipe_crc(crtc, crcs); 1297 1298 spin_lock(&pipe_crc->lock); 1299 /* 1300 * For some not yet identified reason, the first CRC is 1301 * bonkers. So let's just wait for the next vblank and read 1302 * out the buggy result. 1303 * 1304 * On GEN8+ sometimes the second CRC is bonkers as well, so 1305 * don't trust that one either. 1306 */ 1307 if (pipe_crc->skipped <= 0 || 1308 (DISPLAY_VER(dev_priv) >= 8 && pipe_crc->skipped == 1)) { 1309 pipe_crc->skipped++; 1310 spin_unlock(&pipe_crc->lock); 1311 return; 1312 } 1313 spin_unlock(&pipe_crc->lock); 1314 1315 drm_crtc_add_crc_entry(&crtc->base, true, 1316 drm_crtc_accurate_vblank_count(&crtc->base), 1317 crcs); 1318 } 1319 #else 1320 static inline void 1321 display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv, 1322 enum pipe pipe, 1323 u32 crc0, u32 crc1, 1324 u32 crc2, u32 crc3, 1325 u32 crc4) {} 1326 #endif 1327 1328 static void flip_done_handler(struct drm_i915_private *i915, 1329 enum pipe pipe) 1330 { 1331 struct intel_crtc *crtc = intel_get_crtc_for_pipe(i915, pipe); 1332 struct drm_crtc_state *crtc_state = crtc->base.state; 1333 struct drm_pending_vblank_event *e = crtc_state->event; 1334 struct drm_device *dev = &i915->drm; 1335 unsigned long irqflags; 1336 1337 spin_lock_irqsave(&dev->event_lock, irqflags); 1338 1339 crtc_state->event = NULL; 1340 1341 drm_crtc_send_vblank_event(&crtc->base, e); 1342 1343 spin_unlock_irqrestore(&dev->event_lock, irqflags); 1344 } 1345 1346 static void hsw_pipe_crc_irq_handler(struct drm_i915_private *dev_priv, 1347 enum pipe pipe) 1348 { 1349 display_pipe_crc_irq_handler(dev_priv, pipe, 1350 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_1_IVB(pipe)), 1351 0, 0, 0, 0); 1352 } 1353 1354 static void ivb_pipe_crc_irq_handler(struct drm_i915_private *dev_priv, 1355 enum pipe pipe) 1356 { 1357 display_pipe_crc_irq_handler(dev_priv, pipe, 1358 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_1_IVB(pipe)), 1359 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_2_IVB(pipe)), 1360 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_3_IVB(pipe)), 1361 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_4_IVB(pipe)), 1362 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_5_IVB(pipe))); 1363 } 1364 1365 static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv, 1366 enum pipe pipe) 1367 { 1368 u32 res1, res2; 1369 1370 if (DISPLAY_VER(dev_priv) >= 3) 1371 res1 = intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_RES1_I915(pipe)); 1372 else 1373 res1 = 0; 1374 1375 if (DISPLAY_VER(dev_priv) >= 5 || IS_G4X(dev_priv)) 1376 res2 = intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_RES2_G4X(pipe)); 1377 else 1378 res2 = 0; 1379 1380 display_pipe_crc_irq_handler(dev_priv, pipe, 1381 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_RED(pipe)), 1382 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_GREEN(pipe)), 1383 intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_BLUE(pipe)), 1384 res1, res2); 1385 } 1386 1387 static void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv) 1388 { 1389 enum pipe pipe; 1390 1391 for_each_pipe(dev_priv, pipe) { 1392 intel_uncore_write(&dev_priv->uncore, PIPESTAT(pipe), 1393 PIPESTAT_INT_STATUS_MASK | 1394 PIPE_FIFO_UNDERRUN_STATUS); 1395 1396 dev_priv->pipestat_irq_mask[pipe] = 0; 1397 } 1398 } 1399 1400 static void i9xx_pipestat_irq_ack(struct drm_i915_private *dev_priv, 1401 u32 iir, u32 pipe_stats[I915_MAX_PIPES]) 1402 { 1403 enum pipe pipe; 1404 1405 spin_lock(&dev_priv->irq_lock); 1406 1407 if (!dev_priv->display_irqs_enabled) { 1408 spin_unlock(&dev_priv->irq_lock); 1409 return; 1410 } 1411 1412 for_each_pipe(dev_priv, pipe) { 1413 i915_reg_t reg; 1414 u32 status_mask, enable_mask, iir_bit = 0; 1415 1416 /* 1417 * PIPESTAT bits get signalled even when the interrupt is 1418 * disabled with the mask bits, and some of the status bits do 1419 * not generate interrupts at all (like the underrun bit). Hence 1420 * we need to be careful that we only handle what we want to 1421 * handle. 1422 */ 1423 1424 /* fifo underruns are filterered in the underrun handler. */ 1425 status_mask = PIPE_FIFO_UNDERRUN_STATUS; 1426 1427 switch (pipe) { 1428 default: 1429 case PIPE_A: 1430 iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT; 1431 break; 1432 case PIPE_B: 1433 iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT; 1434 break; 1435 case PIPE_C: 1436 iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT; 1437 break; 1438 } 1439 if (iir & iir_bit) 1440 status_mask |= dev_priv->pipestat_irq_mask[pipe]; 1441 1442 if (!status_mask) 1443 continue; 1444 1445 reg = PIPESTAT(pipe); 1446 pipe_stats[pipe] = intel_uncore_read(&dev_priv->uncore, reg) & status_mask; 1447 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe); 1448 1449 /* 1450 * Clear the PIPE*STAT regs before the IIR 1451 * 1452 * Toggle the enable bits to make sure we get an 1453 * edge in the ISR pipe event bit if we don't clear 1454 * all the enabled status bits. Otherwise the edge 1455 * triggered IIR on i965/g4x wouldn't notice that 1456 * an interrupt is still pending. 1457 */ 1458 if (pipe_stats[pipe]) { 1459 intel_uncore_write(&dev_priv->uncore, reg, pipe_stats[pipe]); 1460 intel_uncore_write(&dev_priv->uncore, reg, enable_mask); 1461 } 1462 } 1463 spin_unlock(&dev_priv->irq_lock); 1464 } 1465 1466 static void i8xx_pipestat_irq_handler(struct drm_i915_private *dev_priv, 1467 u16 iir, u32 pipe_stats[I915_MAX_PIPES]) 1468 { 1469 enum pipe pipe; 1470 1471 for_each_pipe(dev_priv, pipe) { 1472 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS) 1473 intel_handle_vblank(dev_priv, pipe); 1474 1475 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) 1476 i9xx_pipe_crc_irq_handler(dev_priv, pipe); 1477 1478 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) 1479 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 1480 } 1481 } 1482 1483 static void i915_pipestat_irq_handler(struct drm_i915_private *dev_priv, 1484 u32 iir, u32 pipe_stats[I915_MAX_PIPES]) 1485 { 1486 bool blc_event = false; 1487 enum pipe pipe; 1488 1489 for_each_pipe(dev_priv, pipe) { 1490 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS) 1491 intel_handle_vblank(dev_priv, pipe); 1492 1493 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) 1494 blc_event = true; 1495 1496 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) 1497 i9xx_pipe_crc_irq_handler(dev_priv, pipe); 1498 1499 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) 1500 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 1501 } 1502 1503 if (blc_event || (iir & I915_ASLE_INTERRUPT)) 1504 intel_opregion_asle_intr(dev_priv); 1505 } 1506 1507 static void i965_pipestat_irq_handler(struct drm_i915_private *dev_priv, 1508 u32 iir, u32 pipe_stats[I915_MAX_PIPES]) 1509 { 1510 bool blc_event = false; 1511 enum pipe pipe; 1512 1513 for_each_pipe(dev_priv, pipe) { 1514 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS) 1515 intel_handle_vblank(dev_priv, pipe); 1516 1517 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) 1518 blc_event = true; 1519 1520 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) 1521 i9xx_pipe_crc_irq_handler(dev_priv, pipe); 1522 1523 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) 1524 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 1525 } 1526 1527 if (blc_event || (iir & I915_ASLE_INTERRUPT)) 1528 intel_opregion_asle_intr(dev_priv); 1529 1530 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS) 1531 gmbus_irq_handler(dev_priv); 1532 } 1533 1534 static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv, 1535 u32 pipe_stats[I915_MAX_PIPES]) 1536 { 1537 enum pipe pipe; 1538 1539 for_each_pipe(dev_priv, pipe) { 1540 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS) 1541 intel_handle_vblank(dev_priv, pipe); 1542 1543 if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) 1544 flip_done_handler(dev_priv, pipe); 1545 1546 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) 1547 i9xx_pipe_crc_irq_handler(dev_priv, pipe); 1548 1549 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) 1550 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 1551 } 1552 1553 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS) 1554 gmbus_irq_handler(dev_priv); 1555 } 1556 1557 static u32 i9xx_hpd_irq_ack(struct drm_i915_private *dev_priv) 1558 { 1559 u32 hotplug_status = 0, hotplug_status_mask; 1560 int i; 1561 1562 if (IS_G4X(dev_priv) || 1563 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) 1564 hotplug_status_mask = HOTPLUG_INT_STATUS_G4X | 1565 DP_AUX_CHANNEL_MASK_INT_STATUS_G4X; 1566 else 1567 hotplug_status_mask = HOTPLUG_INT_STATUS_I915; 1568 1569 /* 1570 * We absolutely have to clear all the pending interrupt 1571 * bits in PORT_HOTPLUG_STAT. Otherwise the ISR port 1572 * interrupt bit won't have an edge, and the i965/g4x 1573 * edge triggered IIR will not notice that an interrupt 1574 * is still pending. We can't use PORT_HOTPLUG_EN to 1575 * guarantee the edge as the act of toggling the enable 1576 * bits can itself generate a new hotplug interrupt :( 1577 */ 1578 for (i = 0; i < 10; i++) { 1579 u32 tmp = intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT) & hotplug_status_mask; 1580 1581 if (tmp == 0) 1582 return hotplug_status; 1583 1584 hotplug_status |= tmp; 1585 intel_uncore_write(&dev_priv->uncore, PORT_HOTPLUG_STAT, hotplug_status); 1586 } 1587 1588 drm_WARN_ONCE(&dev_priv->drm, 1, 1589 "PORT_HOTPLUG_STAT did not clear (0x%08x)\n", 1590 intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT)); 1591 1592 return hotplug_status; 1593 } 1594 1595 static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv, 1596 u32 hotplug_status) 1597 { 1598 u32 pin_mask = 0, long_mask = 0; 1599 u32 hotplug_trigger; 1600 1601 if (IS_G4X(dev_priv) || 1602 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) 1603 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X; 1604 else 1605 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915; 1606 1607 if (hotplug_trigger) { 1608 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 1609 hotplug_trigger, hotplug_trigger, 1610 dev_priv->hotplug.hpd, 1611 i9xx_port_hotplug_long_detect); 1612 1613 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 1614 } 1615 1616 if ((IS_G4X(dev_priv) || 1617 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && 1618 hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X) 1619 dp_aux_irq_handler(dev_priv); 1620 } 1621 1622 static irqreturn_t valleyview_irq_handler(int irq, void *arg) 1623 { 1624 struct drm_i915_private *dev_priv = arg; 1625 irqreturn_t ret = IRQ_NONE; 1626 1627 if (!intel_irqs_enabled(dev_priv)) 1628 return IRQ_NONE; 1629 1630 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 1631 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1632 1633 do { 1634 u32 iir, gt_iir, pm_iir; 1635 u32 pipe_stats[I915_MAX_PIPES] = {}; 1636 u32 hotplug_status = 0; 1637 u32 ier = 0; 1638 1639 gt_iir = intel_uncore_read(&dev_priv->uncore, GTIIR); 1640 pm_iir = intel_uncore_read(&dev_priv->uncore, GEN6_PMIIR); 1641 iir = intel_uncore_read(&dev_priv->uncore, VLV_IIR); 1642 1643 if (gt_iir == 0 && pm_iir == 0 && iir == 0) 1644 break; 1645 1646 ret = IRQ_HANDLED; 1647 1648 /* 1649 * Theory on interrupt generation, based on empirical evidence: 1650 * 1651 * x = ((VLV_IIR & VLV_IER) || 1652 * (((GT_IIR & GT_IER) || (GEN6_PMIIR & GEN6_PMIER)) && 1653 * (VLV_MASTER_IER & MASTER_INTERRUPT_ENABLE))); 1654 * 1655 * A CPU interrupt will only be raised when 'x' has a 0->1 edge. 1656 * Hence we clear MASTER_INTERRUPT_ENABLE and VLV_IER to 1657 * guarantee the CPU interrupt will be raised again even if we 1658 * don't end up clearing all the VLV_IIR, GT_IIR, GEN6_PMIIR 1659 * bits this time around. 1660 */ 1661 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, 0); 1662 ier = intel_uncore_read(&dev_priv->uncore, VLV_IER); 1663 intel_uncore_write(&dev_priv->uncore, VLV_IER, 0); 1664 1665 if (gt_iir) 1666 intel_uncore_write(&dev_priv->uncore, GTIIR, gt_iir); 1667 if (pm_iir) 1668 intel_uncore_write(&dev_priv->uncore, GEN6_PMIIR, pm_iir); 1669 1670 if (iir & I915_DISPLAY_PORT_INTERRUPT) 1671 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 1672 1673 /* Call regardless, as some status bits might not be 1674 * signalled in iir */ 1675 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1676 1677 if (iir & (I915_LPE_PIPE_A_INTERRUPT | 1678 I915_LPE_PIPE_B_INTERRUPT)) 1679 intel_lpe_audio_irq_handler(dev_priv); 1680 1681 /* 1682 * VLV_IIR is single buffered, and reflects the level 1683 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last. 1684 */ 1685 if (iir) 1686 intel_uncore_write(&dev_priv->uncore, VLV_IIR, iir); 1687 1688 intel_uncore_write(&dev_priv->uncore, VLV_IER, ier); 1689 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); 1690 1691 if (gt_iir) 1692 gen6_gt_irq_handler(&dev_priv->gt, gt_iir); 1693 if (pm_iir) 1694 gen6_rps_irq_handler(&dev_priv->gt.rps, pm_iir); 1695 1696 if (hotplug_status) 1697 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 1698 1699 valleyview_pipestat_irq_handler(dev_priv, pipe_stats); 1700 } while (0); 1701 1702 pmu_irq_stats(dev_priv, ret); 1703 1704 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1705 1706 return ret; 1707 } 1708 1709 static irqreturn_t cherryview_irq_handler(int irq, void *arg) 1710 { 1711 struct drm_i915_private *dev_priv = arg; 1712 irqreturn_t ret = IRQ_NONE; 1713 1714 if (!intel_irqs_enabled(dev_priv)) 1715 return IRQ_NONE; 1716 1717 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 1718 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1719 1720 do { 1721 u32 master_ctl, iir; 1722 u32 pipe_stats[I915_MAX_PIPES] = {}; 1723 u32 hotplug_status = 0; 1724 u32 ier = 0; 1725 1726 master_ctl = intel_uncore_read(&dev_priv->uncore, GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL; 1727 iir = intel_uncore_read(&dev_priv->uncore, VLV_IIR); 1728 1729 if (master_ctl == 0 && iir == 0) 1730 break; 1731 1732 ret = IRQ_HANDLED; 1733 1734 /* 1735 * Theory on interrupt generation, based on empirical evidence: 1736 * 1737 * x = ((VLV_IIR & VLV_IER) || 1738 * ((GEN8_MASTER_IRQ & ~GEN8_MASTER_IRQ_CONTROL) && 1739 * (GEN8_MASTER_IRQ & GEN8_MASTER_IRQ_CONTROL))); 1740 * 1741 * A CPU interrupt will only be raised when 'x' has a 0->1 edge. 1742 * Hence we clear GEN8_MASTER_IRQ_CONTROL and VLV_IER to 1743 * guarantee the CPU interrupt will be raised again even if we 1744 * don't end up clearing all the VLV_IIR and GEN8_MASTER_IRQ_CONTROL 1745 * bits this time around. 1746 */ 1747 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, 0); 1748 ier = intel_uncore_read(&dev_priv->uncore, VLV_IER); 1749 intel_uncore_write(&dev_priv->uncore, VLV_IER, 0); 1750 1751 gen8_gt_irq_handler(&dev_priv->gt, master_ctl); 1752 1753 if (iir & I915_DISPLAY_PORT_INTERRUPT) 1754 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 1755 1756 /* Call regardless, as some status bits might not be 1757 * signalled in iir */ 1758 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 1759 1760 if (iir & (I915_LPE_PIPE_A_INTERRUPT | 1761 I915_LPE_PIPE_B_INTERRUPT | 1762 I915_LPE_PIPE_C_INTERRUPT)) 1763 intel_lpe_audio_irq_handler(dev_priv); 1764 1765 /* 1766 * VLV_IIR is single buffered, and reflects the level 1767 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last. 1768 */ 1769 if (iir) 1770 intel_uncore_write(&dev_priv->uncore, VLV_IIR, iir); 1771 1772 intel_uncore_write(&dev_priv->uncore, VLV_IER, ier); 1773 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 1774 1775 if (hotplug_status) 1776 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 1777 1778 valleyview_pipestat_irq_handler(dev_priv, pipe_stats); 1779 } while (0); 1780 1781 pmu_irq_stats(dev_priv, ret); 1782 1783 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 1784 1785 return ret; 1786 } 1787 1788 static void ibx_hpd_irq_handler(struct drm_i915_private *dev_priv, 1789 u32 hotplug_trigger) 1790 { 1791 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0; 1792 1793 /* 1794 * Somehow the PCH doesn't seem to really ack the interrupt to the CPU 1795 * unless we touch the hotplug register, even if hotplug_trigger is 1796 * zero. Not acking leads to "The master control interrupt lied (SDE)!" 1797 * errors. 1798 */ 1799 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG); 1800 if (!hotplug_trigger) { 1801 u32 mask = PORTA_HOTPLUG_STATUS_MASK | 1802 PORTD_HOTPLUG_STATUS_MASK | 1803 PORTC_HOTPLUG_STATUS_MASK | 1804 PORTB_HOTPLUG_STATUS_MASK; 1805 dig_hotplug_reg &= ~mask; 1806 } 1807 1808 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, dig_hotplug_reg); 1809 if (!hotplug_trigger) 1810 return; 1811 1812 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 1813 hotplug_trigger, dig_hotplug_reg, 1814 dev_priv->hotplug.pch_hpd, 1815 pch_port_hotplug_long_detect); 1816 1817 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 1818 } 1819 1820 static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir) 1821 { 1822 enum pipe pipe; 1823 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK; 1824 1825 ibx_hpd_irq_handler(dev_priv, hotplug_trigger); 1826 1827 if (pch_iir & SDE_AUDIO_POWER_MASK) { 1828 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >> 1829 SDE_AUDIO_POWER_SHIFT); 1830 drm_dbg(&dev_priv->drm, "PCH audio power change on port %d\n", 1831 port_name(port)); 1832 } 1833 1834 if (pch_iir & SDE_AUX_MASK) 1835 dp_aux_irq_handler(dev_priv); 1836 1837 if (pch_iir & SDE_GMBUS) 1838 gmbus_irq_handler(dev_priv); 1839 1840 if (pch_iir & SDE_AUDIO_HDCP_MASK) 1841 drm_dbg(&dev_priv->drm, "PCH HDCP audio interrupt\n"); 1842 1843 if (pch_iir & SDE_AUDIO_TRANS_MASK) 1844 drm_dbg(&dev_priv->drm, "PCH transcoder audio interrupt\n"); 1845 1846 if (pch_iir & SDE_POISON) 1847 drm_err(&dev_priv->drm, "PCH poison interrupt\n"); 1848 1849 if (pch_iir & SDE_FDI_MASK) { 1850 for_each_pipe(dev_priv, pipe) 1851 drm_dbg(&dev_priv->drm, " pipe %c FDI IIR: 0x%08x\n", 1852 pipe_name(pipe), 1853 intel_uncore_read(&dev_priv->uncore, FDI_RX_IIR(pipe))); 1854 } 1855 1856 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE)) 1857 drm_dbg(&dev_priv->drm, "PCH transcoder CRC done interrupt\n"); 1858 1859 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR)) 1860 drm_dbg(&dev_priv->drm, 1861 "PCH transcoder CRC error interrupt\n"); 1862 1863 if (pch_iir & SDE_TRANSA_FIFO_UNDER) 1864 intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_A); 1865 1866 if (pch_iir & SDE_TRANSB_FIFO_UNDER) 1867 intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_B); 1868 } 1869 1870 static void ivb_err_int_handler(struct drm_i915_private *dev_priv) 1871 { 1872 u32 err_int = intel_uncore_read(&dev_priv->uncore, GEN7_ERR_INT); 1873 enum pipe pipe; 1874 1875 if (err_int & ERR_INT_POISON) 1876 drm_err(&dev_priv->drm, "Poison interrupt\n"); 1877 1878 for_each_pipe(dev_priv, pipe) { 1879 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe)) 1880 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 1881 1882 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) { 1883 if (IS_IVYBRIDGE(dev_priv)) 1884 ivb_pipe_crc_irq_handler(dev_priv, pipe); 1885 else 1886 hsw_pipe_crc_irq_handler(dev_priv, pipe); 1887 } 1888 } 1889 1890 intel_uncore_write(&dev_priv->uncore, GEN7_ERR_INT, err_int); 1891 } 1892 1893 static void cpt_serr_int_handler(struct drm_i915_private *dev_priv) 1894 { 1895 u32 serr_int = intel_uncore_read(&dev_priv->uncore, SERR_INT); 1896 enum pipe pipe; 1897 1898 if (serr_int & SERR_INT_POISON) 1899 drm_err(&dev_priv->drm, "PCH poison interrupt\n"); 1900 1901 for_each_pipe(dev_priv, pipe) 1902 if (serr_int & SERR_INT_TRANS_FIFO_UNDERRUN(pipe)) 1903 intel_pch_fifo_underrun_irq_handler(dev_priv, pipe); 1904 1905 intel_uncore_write(&dev_priv->uncore, SERR_INT, serr_int); 1906 } 1907 1908 static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir) 1909 { 1910 enum pipe pipe; 1911 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT; 1912 1913 ibx_hpd_irq_handler(dev_priv, hotplug_trigger); 1914 1915 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) { 1916 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >> 1917 SDE_AUDIO_POWER_SHIFT_CPT); 1918 drm_dbg(&dev_priv->drm, "PCH audio power change on port %c\n", 1919 port_name(port)); 1920 } 1921 1922 if (pch_iir & SDE_AUX_MASK_CPT) 1923 dp_aux_irq_handler(dev_priv); 1924 1925 if (pch_iir & SDE_GMBUS_CPT) 1926 gmbus_irq_handler(dev_priv); 1927 1928 if (pch_iir & SDE_AUDIO_CP_REQ_CPT) 1929 drm_dbg(&dev_priv->drm, "Audio CP request interrupt\n"); 1930 1931 if (pch_iir & SDE_AUDIO_CP_CHG_CPT) 1932 drm_dbg(&dev_priv->drm, "Audio CP change interrupt\n"); 1933 1934 if (pch_iir & SDE_FDI_MASK_CPT) { 1935 for_each_pipe(dev_priv, pipe) 1936 drm_dbg(&dev_priv->drm, " pipe %c FDI IIR: 0x%08x\n", 1937 pipe_name(pipe), 1938 intel_uncore_read(&dev_priv->uncore, FDI_RX_IIR(pipe))); 1939 } 1940 1941 if (pch_iir & SDE_ERROR_CPT) 1942 cpt_serr_int_handler(dev_priv); 1943 } 1944 1945 static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir) 1946 { 1947 u32 ddi_hotplug_trigger = pch_iir & SDE_DDI_HOTPLUG_MASK_ICP; 1948 u32 tc_hotplug_trigger = pch_iir & SDE_TC_HOTPLUG_MASK_ICP; 1949 u32 pin_mask = 0, long_mask = 0; 1950 1951 if (ddi_hotplug_trigger) { 1952 u32 dig_hotplug_reg; 1953 1954 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, SHOTPLUG_CTL_DDI); 1955 intel_uncore_write(&dev_priv->uncore, SHOTPLUG_CTL_DDI, dig_hotplug_reg); 1956 1957 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 1958 ddi_hotplug_trigger, dig_hotplug_reg, 1959 dev_priv->hotplug.pch_hpd, 1960 icp_ddi_port_hotplug_long_detect); 1961 } 1962 1963 if (tc_hotplug_trigger) { 1964 u32 dig_hotplug_reg; 1965 1966 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, SHOTPLUG_CTL_TC); 1967 intel_uncore_write(&dev_priv->uncore, SHOTPLUG_CTL_TC, dig_hotplug_reg); 1968 1969 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 1970 tc_hotplug_trigger, dig_hotplug_reg, 1971 dev_priv->hotplug.pch_hpd, 1972 icp_tc_port_hotplug_long_detect); 1973 } 1974 1975 if (pin_mask) 1976 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 1977 1978 if (pch_iir & SDE_GMBUS_ICP) 1979 gmbus_irq_handler(dev_priv); 1980 } 1981 1982 static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir) 1983 { 1984 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT & 1985 ~SDE_PORTE_HOTPLUG_SPT; 1986 u32 hotplug2_trigger = pch_iir & SDE_PORTE_HOTPLUG_SPT; 1987 u32 pin_mask = 0, long_mask = 0; 1988 1989 if (hotplug_trigger) { 1990 u32 dig_hotplug_reg; 1991 1992 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG); 1993 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, dig_hotplug_reg); 1994 1995 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 1996 hotplug_trigger, dig_hotplug_reg, 1997 dev_priv->hotplug.pch_hpd, 1998 spt_port_hotplug_long_detect); 1999 } 2000 2001 if (hotplug2_trigger) { 2002 u32 dig_hotplug_reg; 2003 2004 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG2); 2005 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG2, dig_hotplug_reg); 2006 2007 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 2008 hotplug2_trigger, dig_hotplug_reg, 2009 dev_priv->hotplug.pch_hpd, 2010 spt_port_hotplug2_long_detect); 2011 } 2012 2013 if (pin_mask) 2014 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 2015 2016 if (pch_iir & SDE_GMBUS_CPT) 2017 gmbus_irq_handler(dev_priv); 2018 } 2019 2020 static void ilk_hpd_irq_handler(struct drm_i915_private *dev_priv, 2021 u32 hotplug_trigger) 2022 { 2023 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0; 2024 2025 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, DIGITAL_PORT_HOTPLUG_CNTRL); 2026 intel_uncore_write(&dev_priv->uncore, DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg); 2027 2028 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 2029 hotplug_trigger, dig_hotplug_reg, 2030 dev_priv->hotplug.hpd, 2031 ilk_port_hotplug_long_detect); 2032 2033 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 2034 } 2035 2036 static void ilk_display_irq_handler(struct drm_i915_private *dev_priv, 2037 u32 de_iir) 2038 { 2039 enum pipe pipe; 2040 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG; 2041 2042 if (hotplug_trigger) 2043 ilk_hpd_irq_handler(dev_priv, hotplug_trigger); 2044 2045 if (de_iir & DE_AUX_CHANNEL_A) 2046 dp_aux_irq_handler(dev_priv); 2047 2048 if (de_iir & DE_GSE) 2049 intel_opregion_asle_intr(dev_priv); 2050 2051 if (de_iir & DE_POISON) 2052 drm_err(&dev_priv->drm, "Poison interrupt\n"); 2053 2054 for_each_pipe(dev_priv, pipe) { 2055 if (de_iir & DE_PIPE_VBLANK(pipe)) 2056 intel_handle_vblank(dev_priv, pipe); 2057 2058 if (de_iir & DE_PLANE_FLIP_DONE(pipe)) 2059 flip_done_handler(dev_priv, pipe); 2060 2061 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe)) 2062 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 2063 2064 if (de_iir & DE_PIPE_CRC_DONE(pipe)) 2065 i9xx_pipe_crc_irq_handler(dev_priv, pipe); 2066 } 2067 2068 /* check event from PCH */ 2069 if (de_iir & DE_PCH_EVENT) { 2070 u32 pch_iir = intel_uncore_read(&dev_priv->uncore, SDEIIR); 2071 2072 if (HAS_PCH_CPT(dev_priv)) 2073 cpt_irq_handler(dev_priv, pch_iir); 2074 else 2075 ibx_irq_handler(dev_priv, pch_iir); 2076 2077 /* should clear PCH hotplug event before clear CPU irq */ 2078 intel_uncore_write(&dev_priv->uncore, SDEIIR, pch_iir); 2079 } 2080 2081 if (DISPLAY_VER(dev_priv) == 5 && de_iir & DE_PCU_EVENT) 2082 gen5_rps_irq_handler(&dev_priv->gt.rps); 2083 } 2084 2085 static void ivb_display_irq_handler(struct drm_i915_private *dev_priv, 2086 u32 de_iir) 2087 { 2088 enum pipe pipe; 2089 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB; 2090 2091 if (hotplug_trigger) 2092 ilk_hpd_irq_handler(dev_priv, hotplug_trigger); 2093 2094 if (de_iir & DE_ERR_INT_IVB) 2095 ivb_err_int_handler(dev_priv); 2096 2097 if (de_iir & DE_EDP_PSR_INT_HSW) { 2098 struct intel_encoder *encoder; 2099 2100 for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) { 2101 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 2102 2103 u32 psr_iir = intel_uncore_read(&dev_priv->uncore, 2104 EDP_PSR_IIR); 2105 2106 intel_psr_irq_handler(intel_dp, psr_iir); 2107 intel_uncore_write(&dev_priv->uncore, 2108 EDP_PSR_IIR, psr_iir); 2109 break; 2110 } 2111 } 2112 2113 if (de_iir & DE_AUX_CHANNEL_A_IVB) 2114 dp_aux_irq_handler(dev_priv); 2115 2116 if (de_iir & DE_GSE_IVB) 2117 intel_opregion_asle_intr(dev_priv); 2118 2119 for_each_pipe(dev_priv, pipe) { 2120 if (de_iir & DE_PIPE_VBLANK_IVB(pipe)) 2121 intel_handle_vblank(dev_priv, pipe); 2122 2123 if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) 2124 flip_done_handler(dev_priv, pipe); 2125 } 2126 2127 /* check event from PCH */ 2128 if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) { 2129 u32 pch_iir = intel_uncore_read(&dev_priv->uncore, SDEIIR); 2130 2131 cpt_irq_handler(dev_priv, pch_iir); 2132 2133 /* clear PCH hotplug event before clear CPU irq */ 2134 intel_uncore_write(&dev_priv->uncore, SDEIIR, pch_iir); 2135 } 2136 } 2137 2138 /* 2139 * To handle irqs with the minimum potential races with fresh interrupts, we: 2140 * 1 - Disable Master Interrupt Control. 2141 * 2 - Find the source(s) of the interrupt. 2142 * 3 - Clear the Interrupt Identity bits (IIR). 2143 * 4 - Process the interrupt(s) that had bits set in the IIRs. 2144 * 5 - Re-enable Master Interrupt Control. 2145 */ 2146 static irqreturn_t ilk_irq_handler(int irq, void *arg) 2147 { 2148 struct drm_i915_private *i915 = arg; 2149 void __iomem * const regs = i915->uncore.regs; 2150 u32 de_iir, gt_iir, de_ier, sde_ier = 0; 2151 irqreturn_t ret = IRQ_NONE; 2152 2153 if (unlikely(!intel_irqs_enabled(i915))) 2154 return IRQ_NONE; 2155 2156 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 2157 disable_rpm_wakeref_asserts(&i915->runtime_pm); 2158 2159 /* disable master interrupt before clearing iir */ 2160 de_ier = raw_reg_read(regs, DEIER); 2161 raw_reg_write(regs, DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); 2162 2163 /* Disable south interrupts. We'll only write to SDEIIR once, so further 2164 * interrupts will will be stored on its back queue, and then we'll be 2165 * able to process them after we restore SDEIER (as soon as we restore 2166 * it, we'll get an interrupt if SDEIIR still has something to process 2167 * due to its back queue). */ 2168 if (!HAS_PCH_NOP(i915)) { 2169 sde_ier = raw_reg_read(regs, SDEIER); 2170 raw_reg_write(regs, SDEIER, 0); 2171 } 2172 2173 /* Find, clear, then process each source of interrupt */ 2174 2175 gt_iir = raw_reg_read(regs, GTIIR); 2176 if (gt_iir) { 2177 raw_reg_write(regs, GTIIR, gt_iir); 2178 if (GRAPHICS_VER(i915) >= 6) 2179 gen6_gt_irq_handler(&i915->gt, gt_iir); 2180 else 2181 gen5_gt_irq_handler(&i915->gt, gt_iir); 2182 ret = IRQ_HANDLED; 2183 } 2184 2185 de_iir = raw_reg_read(regs, DEIIR); 2186 if (de_iir) { 2187 raw_reg_write(regs, DEIIR, de_iir); 2188 if (DISPLAY_VER(i915) >= 7) 2189 ivb_display_irq_handler(i915, de_iir); 2190 else 2191 ilk_display_irq_handler(i915, de_iir); 2192 ret = IRQ_HANDLED; 2193 } 2194 2195 if (GRAPHICS_VER(i915) >= 6) { 2196 u32 pm_iir = raw_reg_read(regs, GEN6_PMIIR); 2197 if (pm_iir) { 2198 raw_reg_write(regs, GEN6_PMIIR, pm_iir); 2199 gen6_rps_irq_handler(&i915->gt.rps, pm_iir); 2200 ret = IRQ_HANDLED; 2201 } 2202 } 2203 2204 raw_reg_write(regs, DEIER, de_ier); 2205 if (sde_ier) 2206 raw_reg_write(regs, SDEIER, sde_ier); 2207 2208 pmu_irq_stats(i915, ret); 2209 2210 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 2211 enable_rpm_wakeref_asserts(&i915->runtime_pm); 2212 2213 return ret; 2214 } 2215 2216 static void bxt_hpd_irq_handler(struct drm_i915_private *dev_priv, 2217 u32 hotplug_trigger) 2218 { 2219 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0; 2220 2221 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG); 2222 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, dig_hotplug_reg); 2223 2224 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 2225 hotplug_trigger, dig_hotplug_reg, 2226 dev_priv->hotplug.hpd, 2227 bxt_port_hotplug_long_detect); 2228 2229 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 2230 } 2231 2232 static void gen11_hpd_irq_handler(struct drm_i915_private *dev_priv, u32 iir) 2233 { 2234 u32 pin_mask = 0, long_mask = 0; 2235 u32 trigger_tc = iir & GEN11_DE_TC_HOTPLUG_MASK; 2236 u32 trigger_tbt = iir & GEN11_DE_TBT_HOTPLUG_MASK; 2237 2238 if (trigger_tc) { 2239 u32 dig_hotplug_reg; 2240 2241 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, GEN11_TC_HOTPLUG_CTL); 2242 intel_uncore_write(&dev_priv->uncore, GEN11_TC_HOTPLUG_CTL, dig_hotplug_reg); 2243 2244 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 2245 trigger_tc, dig_hotplug_reg, 2246 dev_priv->hotplug.hpd, 2247 gen11_port_hotplug_long_detect); 2248 } 2249 2250 if (trigger_tbt) { 2251 u32 dig_hotplug_reg; 2252 2253 dig_hotplug_reg = intel_uncore_read(&dev_priv->uncore, GEN11_TBT_HOTPLUG_CTL); 2254 intel_uncore_write(&dev_priv->uncore, GEN11_TBT_HOTPLUG_CTL, dig_hotplug_reg); 2255 2256 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, 2257 trigger_tbt, dig_hotplug_reg, 2258 dev_priv->hotplug.hpd, 2259 gen11_port_hotplug_long_detect); 2260 } 2261 2262 if (pin_mask) 2263 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask); 2264 else 2265 drm_err(&dev_priv->drm, 2266 "Unexpected DE HPD interrupt 0x%08x\n", iir); 2267 } 2268 2269 static u32 gen8_de_port_aux_mask(struct drm_i915_private *dev_priv) 2270 { 2271 u32 mask; 2272 2273 if (DISPLAY_VER(dev_priv) >= 13) 2274 return TGL_DE_PORT_AUX_DDIA | 2275 TGL_DE_PORT_AUX_DDIB | 2276 TGL_DE_PORT_AUX_DDIC | 2277 XELPD_DE_PORT_AUX_DDID | 2278 XELPD_DE_PORT_AUX_DDIE | 2279 TGL_DE_PORT_AUX_USBC1 | 2280 TGL_DE_PORT_AUX_USBC2 | 2281 TGL_DE_PORT_AUX_USBC3 | 2282 TGL_DE_PORT_AUX_USBC4; 2283 else if (DISPLAY_VER(dev_priv) >= 12) 2284 return TGL_DE_PORT_AUX_DDIA | 2285 TGL_DE_PORT_AUX_DDIB | 2286 TGL_DE_PORT_AUX_DDIC | 2287 TGL_DE_PORT_AUX_USBC1 | 2288 TGL_DE_PORT_AUX_USBC2 | 2289 TGL_DE_PORT_AUX_USBC3 | 2290 TGL_DE_PORT_AUX_USBC4 | 2291 TGL_DE_PORT_AUX_USBC5 | 2292 TGL_DE_PORT_AUX_USBC6; 2293 2294 2295 mask = GEN8_AUX_CHANNEL_A; 2296 if (DISPLAY_VER(dev_priv) >= 9) 2297 mask |= GEN9_AUX_CHANNEL_B | 2298 GEN9_AUX_CHANNEL_C | 2299 GEN9_AUX_CHANNEL_D; 2300 2301 if (IS_CNL_WITH_PORT_F(dev_priv) || DISPLAY_VER(dev_priv) == 11) 2302 mask |= CNL_AUX_CHANNEL_F; 2303 2304 if (DISPLAY_VER(dev_priv) == 11) 2305 mask |= ICL_AUX_CHANNEL_E; 2306 2307 return mask; 2308 } 2309 2310 static u32 gen8_de_pipe_fault_mask(struct drm_i915_private *dev_priv) 2311 { 2312 if (DISPLAY_VER(dev_priv) >= 13 || HAS_D12_PLANE_MINIMIZATION(dev_priv)) 2313 return RKL_DE_PIPE_IRQ_FAULT_ERRORS; 2314 else if (DISPLAY_VER(dev_priv) >= 11) 2315 return GEN11_DE_PIPE_IRQ_FAULT_ERRORS; 2316 else if (DISPLAY_VER(dev_priv) >= 9) 2317 return GEN9_DE_PIPE_IRQ_FAULT_ERRORS; 2318 else 2319 return GEN8_DE_PIPE_IRQ_FAULT_ERRORS; 2320 } 2321 2322 static void 2323 gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir) 2324 { 2325 bool found = false; 2326 2327 if (iir & GEN8_DE_MISC_GSE) { 2328 intel_opregion_asle_intr(dev_priv); 2329 found = true; 2330 } 2331 2332 if (iir & GEN8_DE_EDP_PSR) { 2333 struct intel_encoder *encoder; 2334 u32 psr_iir; 2335 i915_reg_t iir_reg; 2336 2337 for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) { 2338 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 2339 2340 if (DISPLAY_VER(dev_priv) >= 12) 2341 iir_reg = TRANS_PSR_IIR(intel_dp->psr.transcoder); 2342 else 2343 iir_reg = EDP_PSR_IIR; 2344 2345 psr_iir = intel_uncore_read(&dev_priv->uncore, iir_reg); 2346 intel_uncore_write(&dev_priv->uncore, iir_reg, psr_iir); 2347 2348 if (psr_iir) 2349 found = true; 2350 2351 intel_psr_irq_handler(intel_dp, psr_iir); 2352 2353 /* prior GEN12 only have one EDP PSR */ 2354 if (DISPLAY_VER(dev_priv) < 12) 2355 break; 2356 } 2357 } 2358 2359 if (!found) 2360 drm_err(&dev_priv->drm, "Unexpected DE Misc interrupt\n"); 2361 } 2362 2363 static void gen11_dsi_te_interrupt_handler(struct drm_i915_private *dev_priv, 2364 u32 te_trigger) 2365 { 2366 enum pipe pipe = INVALID_PIPE; 2367 enum transcoder dsi_trans; 2368 enum port port; 2369 u32 val, tmp; 2370 2371 /* 2372 * Incase of dual link, TE comes from DSI_1 2373 * this is to check if dual link is enabled 2374 */ 2375 val = intel_uncore_read(&dev_priv->uncore, TRANS_DDI_FUNC_CTL2(TRANSCODER_DSI_0)); 2376 val &= PORT_SYNC_MODE_ENABLE; 2377 2378 /* 2379 * if dual link is enabled, then read DSI_0 2380 * transcoder registers 2381 */ 2382 port = ((te_trigger & DSI1_TE && val) || (te_trigger & DSI0_TE)) ? 2383 PORT_A : PORT_B; 2384 dsi_trans = (port == PORT_A) ? TRANSCODER_DSI_0 : TRANSCODER_DSI_1; 2385 2386 /* Check if DSI configured in command mode */ 2387 val = intel_uncore_read(&dev_priv->uncore, DSI_TRANS_FUNC_CONF(dsi_trans)); 2388 val = val & OP_MODE_MASK; 2389 2390 if (val != CMD_MODE_NO_GATE && val != CMD_MODE_TE_GATE) { 2391 drm_err(&dev_priv->drm, "DSI trancoder not configured in command mode\n"); 2392 return; 2393 } 2394 2395 /* Get PIPE for handling VBLANK event */ 2396 val = intel_uncore_read(&dev_priv->uncore, TRANS_DDI_FUNC_CTL(dsi_trans)); 2397 switch (val & TRANS_DDI_EDP_INPUT_MASK) { 2398 case TRANS_DDI_EDP_INPUT_A_ON: 2399 pipe = PIPE_A; 2400 break; 2401 case TRANS_DDI_EDP_INPUT_B_ONOFF: 2402 pipe = PIPE_B; 2403 break; 2404 case TRANS_DDI_EDP_INPUT_C_ONOFF: 2405 pipe = PIPE_C; 2406 break; 2407 default: 2408 drm_err(&dev_priv->drm, "Invalid PIPE\n"); 2409 return; 2410 } 2411 2412 intel_handle_vblank(dev_priv, pipe); 2413 2414 /* clear TE in dsi IIR */ 2415 port = (te_trigger & DSI1_TE) ? PORT_B : PORT_A; 2416 tmp = intel_uncore_read(&dev_priv->uncore, DSI_INTR_IDENT_REG(port)); 2417 intel_uncore_write(&dev_priv->uncore, DSI_INTR_IDENT_REG(port), tmp); 2418 } 2419 2420 static u32 gen8_de_pipe_flip_done_mask(struct drm_i915_private *i915) 2421 { 2422 if (DISPLAY_VER(i915) >= 9) 2423 return GEN9_PIPE_PLANE1_FLIP_DONE; 2424 else 2425 return GEN8_PIPE_PRIMARY_FLIP_DONE; 2426 } 2427 2428 u32 gen8_de_pipe_underrun_mask(struct drm_i915_private *dev_priv) 2429 { 2430 u32 mask = GEN8_PIPE_FIFO_UNDERRUN; 2431 2432 if (DISPLAY_VER(dev_priv) >= 13) 2433 mask |= XELPD_PIPE_SOFT_UNDERRUN | 2434 XELPD_PIPE_HARD_UNDERRUN; 2435 2436 return mask; 2437 } 2438 2439 static irqreturn_t 2440 gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl) 2441 { 2442 irqreturn_t ret = IRQ_NONE; 2443 u32 iir; 2444 enum pipe pipe; 2445 2446 drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_DISPLAY(dev_priv)); 2447 2448 if (master_ctl & GEN8_DE_MISC_IRQ) { 2449 iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_MISC_IIR); 2450 if (iir) { 2451 intel_uncore_write(&dev_priv->uncore, GEN8_DE_MISC_IIR, iir); 2452 ret = IRQ_HANDLED; 2453 gen8_de_misc_irq_handler(dev_priv, iir); 2454 } else { 2455 drm_err(&dev_priv->drm, 2456 "The master control interrupt lied (DE MISC)!\n"); 2457 } 2458 } 2459 2460 if (DISPLAY_VER(dev_priv) >= 11 && (master_ctl & GEN11_DE_HPD_IRQ)) { 2461 iir = intel_uncore_read(&dev_priv->uncore, GEN11_DE_HPD_IIR); 2462 if (iir) { 2463 intel_uncore_write(&dev_priv->uncore, GEN11_DE_HPD_IIR, iir); 2464 ret = IRQ_HANDLED; 2465 gen11_hpd_irq_handler(dev_priv, iir); 2466 } else { 2467 drm_err(&dev_priv->drm, 2468 "The master control interrupt lied, (DE HPD)!\n"); 2469 } 2470 } 2471 2472 if (master_ctl & GEN8_DE_PORT_IRQ) { 2473 iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PORT_IIR); 2474 if (iir) { 2475 bool found = false; 2476 2477 intel_uncore_write(&dev_priv->uncore, GEN8_DE_PORT_IIR, iir); 2478 ret = IRQ_HANDLED; 2479 2480 if (iir & gen8_de_port_aux_mask(dev_priv)) { 2481 dp_aux_irq_handler(dev_priv); 2482 found = true; 2483 } 2484 2485 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) { 2486 u32 hotplug_trigger = iir & BXT_DE_PORT_HOTPLUG_MASK; 2487 2488 if (hotplug_trigger) { 2489 bxt_hpd_irq_handler(dev_priv, hotplug_trigger); 2490 found = true; 2491 } 2492 } else if (IS_BROADWELL(dev_priv)) { 2493 u32 hotplug_trigger = iir & BDW_DE_PORT_HOTPLUG_MASK; 2494 2495 if (hotplug_trigger) { 2496 ilk_hpd_irq_handler(dev_priv, hotplug_trigger); 2497 found = true; 2498 } 2499 } 2500 2501 if ((IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) && 2502 (iir & BXT_DE_PORT_GMBUS)) { 2503 gmbus_irq_handler(dev_priv); 2504 found = true; 2505 } 2506 2507 if (DISPLAY_VER(dev_priv) >= 11) { 2508 u32 te_trigger = iir & (DSI0_TE | DSI1_TE); 2509 2510 if (te_trigger) { 2511 gen11_dsi_te_interrupt_handler(dev_priv, te_trigger); 2512 found = true; 2513 } 2514 } 2515 2516 if (!found) 2517 drm_err(&dev_priv->drm, 2518 "Unexpected DE Port interrupt\n"); 2519 } 2520 else 2521 drm_err(&dev_priv->drm, 2522 "The master control interrupt lied (DE PORT)!\n"); 2523 } 2524 2525 for_each_pipe(dev_priv, pipe) { 2526 u32 fault_errors; 2527 2528 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe))) 2529 continue; 2530 2531 iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PIPE_IIR(pipe)); 2532 if (!iir) { 2533 drm_err(&dev_priv->drm, 2534 "The master control interrupt lied (DE PIPE)!\n"); 2535 continue; 2536 } 2537 2538 ret = IRQ_HANDLED; 2539 intel_uncore_write(&dev_priv->uncore, GEN8_DE_PIPE_IIR(pipe), iir); 2540 2541 if (iir & GEN8_PIPE_VBLANK) 2542 intel_handle_vblank(dev_priv, pipe); 2543 2544 if (iir & gen8_de_pipe_flip_done_mask(dev_priv)) 2545 flip_done_handler(dev_priv, pipe); 2546 2547 if (iir & GEN8_PIPE_CDCLK_CRC_DONE) 2548 hsw_pipe_crc_irq_handler(dev_priv, pipe); 2549 2550 if (iir & gen8_de_pipe_underrun_mask(dev_priv)) 2551 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); 2552 2553 fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv); 2554 if (fault_errors) 2555 drm_err(&dev_priv->drm, 2556 "Fault errors on pipe %c: 0x%08x\n", 2557 pipe_name(pipe), 2558 fault_errors); 2559 } 2560 2561 if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) && 2562 master_ctl & GEN8_DE_PCH_IRQ) { 2563 /* 2564 * FIXME(BDW): Assume for now that the new interrupt handling 2565 * scheme also closed the SDE interrupt handling race we've seen 2566 * on older pch-split platforms. But this needs testing. 2567 */ 2568 iir = intel_uncore_read(&dev_priv->uncore, SDEIIR); 2569 if (iir) { 2570 intel_uncore_write(&dev_priv->uncore, SDEIIR, iir); 2571 ret = IRQ_HANDLED; 2572 2573 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 2574 icp_irq_handler(dev_priv, iir); 2575 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT) 2576 spt_irq_handler(dev_priv, iir); 2577 else 2578 cpt_irq_handler(dev_priv, iir); 2579 } else { 2580 /* 2581 * Like on previous PCH there seems to be something 2582 * fishy going on with forwarding PCH interrupts. 2583 */ 2584 drm_dbg(&dev_priv->drm, 2585 "The master control interrupt lied (SDE)!\n"); 2586 } 2587 } 2588 2589 return ret; 2590 } 2591 2592 static inline u32 gen8_master_intr_disable(void __iomem * const regs) 2593 { 2594 raw_reg_write(regs, GEN8_MASTER_IRQ, 0); 2595 2596 /* 2597 * Now with master disabled, get a sample of level indications 2598 * for this interrupt. Indications will be cleared on related acks. 2599 * New indications can and will light up during processing, 2600 * and will generate new interrupt after enabling master. 2601 */ 2602 return raw_reg_read(regs, GEN8_MASTER_IRQ); 2603 } 2604 2605 static inline void gen8_master_intr_enable(void __iomem * const regs) 2606 { 2607 raw_reg_write(regs, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 2608 } 2609 2610 static irqreturn_t gen8_irq_handler(int irq, void *arg) 2611 { 2612 struct drm_i915_private *dev_priv = arg; 2613 void __iomem * const regs = dev_priv->uncore.regs; 2614 u32 master_ctl; 2615 2616 if (!intel_irqs_enabled(dev_priv)) 2617 return IRQ_NONE; 2618 2619 master_ctl = gen8_master_intr_disable(regs); 2620 if (!master_ctl) { 2621 gen8_master_intr_enable(regs); 2622 return IRQ_NONE; 2623 } 2624 2625 /* Find, queue (onto bottom-halves), then clear each source */ 2626 gen8_gt_irq_handler(&dev_priv->gt, master_ctl); 2627 2628 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 2629 if (master_ctl & ~GEN8_GT_IRQS) { 2630 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 2631 gen8_de_irq_handler(dev_priv, master_ctl); 2632 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 2633 } 2634 2635 gen8_master_intr_enable(regs); 2636 2637 pmu_irq_stats(dev_priv, IRQ_HANDLED); 2638 2639 return IRQ_HANDLED; 2640 } 2641 2642 static u32 2643 gen11_gu_misc_irq_ack(struct intel_gt *gt, const u32 master_ctl) 2644 { 2645 void __iomem * const regs = gt->uncore->regs; 2646 u32 iir; 2647 2648 if (!(master_ctl & GEN11_GU_MISC_IRQ)) 2649 return 0; 2650 2651 iir = raw_reg_read(regs, GEN11_GU_MISC_IIR); 2652 if (likely(iir)) 2653 raw_reg_write(regs, GEN11_GU_MISC_IIR, iir); 2654 2655 return iir; 2656 } 2657 2658 static void 2659 gen11_gu_misc_irq_handler(struct intel_gt *gt, const u32 iir) 2660 { 2661 if (iir & GEN11_GU_MISC_GSE) 2662 intel_opregion_asle_intr(gt->i915); 2663 } 2664 2665 static inline u32 gen11_master_intr_disable(void __iomem * const regs) 2666 { 2667 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, 0); 2668 2669 /* 2670 * Now with master disabled, get a sample of level indications 2671 * for this interrupt. Indications will be cleared on related acks. 2672 * New indications can and will light up during processing, 2673 * and will generate new interrupt after enabling master. 2674 */ 2675 return raw_reg_read(regs, GEN11_GFX_MSTR_IRQ); 2676 } 2677 2678 static inline void gen11_master_intr_enable(void __iomem * const regs) 2679 { 2680 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ); 2681 } 2682 2683 static void 2684 gen11_display_irq_handler(struct drm_i915_private *i915) 2685 { 2686 void __iomem * const regs = i915->uncore.regs; 2687 const u32 disp_ctl = raw_reg_read(regs, GEN11_DISPLAY_INT_CTL); 2688 2689 disable_rpm_wakeref_asserts(&i915->runtime_pm); 2690 /* 2691 * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ 2692 * for the display related bits. 2693 */ 2694 raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 0x0); 2695 gen8_de_irq_handler(i915, disp_ctl); 2696 raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 2697 GEN11_DISPLAY_IRQ_ENABLE); 2698 2699 enable_rpm_wakeref_asserts(&i915->runtime_pm); 2700 } 2701 2702 static __always_inline irqreturn_t 2703 __gen11_irq_handler(struct drm_i915_private * const i915, 2704 u32 (*intr_disable)(void __iomem * const regs), 2705 void (*intr_enable)(void __iomem * const regs)) 2706 { 2707 void __iomem * const regs = i915->uncore.regs; 2708 struct intel_gt *gt = &i915->gt; 2709 u32 master_ctl; 2710 u32 gu_misc_iir; 2711 2712 if (!intel_irqs_enabled(i915)) 2713 return IRQ_NONE; 2714 2715 master_ctl = intr_disable(regs); 2716 if (!master_ctl) { 2717 intr_enable(regs); 2718 return IRQ_NONE; 2719 } 2720 2721 /* Find, queue (onto bottom-halves), then clear each source */ 2722 gen11_gt_irq_handler(gt, master_ctl); 2723 2724 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 2725 if (master_ctl & GEN11_DISPLAY_IRQ) 2726 gen11_display_irq_handler(i915); 2727 2728 gu_misc_iir = gen11_gu_misc_irq_ack(gt, master_ctl); 2729 2730 intr_enable(regs); 2731 2732 gen11_gu_misc_irq_handler(gt, gu_misc_iir); 2733 2734 pmu_irq_stats(i915, IRQ_HANDLED); 2735 2736 return IRQ_HANDLED; 2737 } 2738 2739 static irqreturn_t gen11_irq_handler(int irq, void *arg) 2740 { 2741 return __gen11_irq_handler(arg, 2742 gen11_master_intr_disable, 2743 gen11_master_intr_enable); 2744 } 2745 2746 static u32 dg1_master_intr_disable_and_ack(void __iomem * const regs) 2747 { 2748 u32 val; 2749 2750 /* First disable interrupts */ 2751 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, 0); 2752 2753 /* Get the indication levels and ack the master unit */ 2754 val = raw_reg_read(regs, DG1_MSTR_UNIT_INTR); 2755 if (unlikely(!val)) 2756 return 0; 2757 2758 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, val); 2759 2760 /* 2761 * Now with master disabled, get a sample of level indications 2762 * for this interrupt and ack them right away - we keep GEN11_MASTER_IRQ 2763 * out as this bit doesn't exist anymore for DG1 2764 */ 2765 val = raw_reg_read(regs, GEN11_GFX_MSTR_IRQ) & ~GEN11_MASTER_IRQ; 2766 if (unlikely(!val)) 2767 return 0; 2768 2769 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, val); 2770 2771 return val; 2772 } 2773 2774 static inline void dg1_master_intr_enable(void __iomem * const regs) 2775 { 2776 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, DG1_MSTR_IRQ); 2777 } 2778 2779 static irqreturn_t dg1_irq_handler(int irq, void *arg) 2780 { 2781 return __gen11_irq_handler(arg, 2782 dg1_master_intr_disable_and_ack, 2783 dg1_master_intr_enable); 2784 } 2785 2786 /* Called from drm generic code, passed 'crtc' which 2787 * we use as a pipe index 2788 */ 2789 int i8xx_enable_vblank(struct drm_crtc *crtc) 2790 { 2791 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2792 enum pipe pipe = to_intel_crtc(crtc)->pipe; 2793 unsigned long irqflags; 2794 2795 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2796 i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS); 2797 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2798 2799 return 0; 2800 } 2801 2802 int i915gm_enable_vblank(struct drm_crtc *crtc) 2803 { 2804 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2805 2806 /* 2807 * Vblank interrupts fail to wake the device up from C2+. 2808 * Disabling render clock gating during C-states avoids 2809 * the problem. There is a small power cost so we do this 2810 * only when vblank interrupts are actually enabled. 2811 */ 2812 if (dev_priv->vblank_enabled++ == 0) 2813 intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_ENABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE)); 2814 2815 return i8xx_enable_vblank(crtc); 2816 } 2817 2818 int i965_enable_vblank(struct drm_crtc *crtc) 2819 { 2820 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2821 enum pipe pipe = to_intel_crtc(crtc)->pipe; 2822 unsigned long irqflags; 2823 2824 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2825 i915_enable_pipestat(dev_priv, pipe, 2826 PIPE_START_VBLANK_INTERRUPT_STATUS); 2827 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2828 2829 return 0; 2830 } 2831 2832 int ilk_enable_vblank(struct drm_crtc *crtc) 2833 { 2834 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2835 enum pipe pipe = to_intel_crtc(crtc)->pipe; 2836 unsigned long irqflags; 2837 u32 bit = DISPLAY_VER(dev_priv) >= 7 ? 2838 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe); 2839 2840 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2841 ilk_enable_display_irq(dev_priv, bit); 2842 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2843 2844 /* Even though there is no DMC, frame counter can get stuck when 2845 * PSR is active as no frames are generated. 2846 */ 2847 if (HAS_PSR(dev_priv)) 2848 drm_crtc_vblank_restore(crtc); 2849 2850 return 0; 2851 } 2852 2853 static bool gen11_dsi_configure_te(struct intel_crtc *intel_crtc, 2854 bool enable) 2855 { 2856 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev); 2857 enum port port; 2858 u32 tmp; 2859 2860 if (!(intel_crtc->mode_flags & 2861 (I915_MODE_FLAG_DSI_USE_TE1 | I915_MODE_FLAG_DSI_USE_TE0))) 2862 return false; 2863 2864 /* for dual link cases we consider TE from slave */ 2865 if (intel_crtc->mode_flags & I915_MODE_FLAG_DSI_USE_TE1) 2866 port = PORT_B; 2867 else 2868 port = PORT_A; 2869 2870 tmp = intel_uncore_read(&dev_priv->uncore, DSI_INTR_MASK_REG(port)); 2871 if (enable) 2872 tmp &= ~DSI_TE_EVENT; 2873 else 2874 tmp |= DSI_TE_EVENT; 2875 2876 intel_uncore_write(&dev_priv->uncore, DSI_INTR_MASK_REG(port), tmp); 2877 2878 tmp = intel_uncore_read(&dev_priv->uncore, DSI_INTR_IDENT_REG(port)); 2879 intel_uncore_write(&dev_priv->uncore, DSI_INTR_IDENT_REG(port), tmp); 2880 2881 return true; 2882 } 2883 2884 int bdw_enable_vblank(struct drm_crtc *crtc) 2885 { 2886 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2887 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 2888 enum pipe pipe = intel_crtc->pipe; 2889 unsigned long irqflags; 2890 2891 if (gen11_dsi_configure_te(intel_crtc, true)) 2892 return 0; 2893 2894 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2895 bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK); 2896 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2897 2898 /* Even if there is no DMC, frame counter can get stuck when 2899 * PSR is active as no frames are generated, so check only for PSR. 2900 */ 2901 if (HAS_PSR(dev_priv)) 2902 drm_crtc_vblank_restore(crtc); 2903 2904 return 0; 2905 } 2906 2907 /* Called from drm generic code, passed 'crtc' which 2908 * we use as a pipe index 2909 */ 2910 void i8xx_disable_vblank(struct drm_crtc *crtc) 2911 { 2912 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2913 enum pipe pipe = to_intel_crtc(crtc)->pipe; 2914 unsigned long irqflags; 2915 2916 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2917 i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS); 2918 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2919 } 2920 2921 void i915gm_disable_vblank(struct drm_crtc *crtc) 2922 { 2923 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2924 2925 i8xx_disable_vblank(crtc); 2926 2927 if (--dev_priv->vblank_enabled == 0) 2928 intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_DISABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE)); 2929 } 2930 2931 void i965_disable_vblank(struct drm_crtc *crtc) 2932 { 2933 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2934 enum pipe pipe = to_intel_crtc(crtc)->pipe; 2935 unsigned long irqflags; 2936 2937 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2938 i915_disable_pipestat(dev_priv, pipe, 2939 PIPE_START_VBLANK_INTERRUPT_STATUS); 2940 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2941 } 2942 2943 void ilk_disable_vblank(struct drm_crtc *crtc) 2944 { 2945 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2946 enum pipe pipe = to_intel_crtc(crtc)->pipe; 2947 unsigned long irqflags; 2948 u32 bit = DISPLAY_VER(dev_priv) >= 7 ? 2949 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe); 2950 2951 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2952 ilk_disable_display_irq(dev_priv, bit); 2953 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2954 } 2955 2956 void bdw_disable_vblank(struct drm_crtc *crtc) 2957 { 2958 struct drm_i915_private *dev_priv = to_i915(crtc->dev); 2959 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 2960 enum pipe pipe = intel_crtc->pipe; 2961 unsigned long irqflags; 2962 2963 if (gen11_dsi_configure_te(intel_crtc, false)) 2964 return; 2965 2966 spin_lock_irqsave(&dev_priv->irq_lock, irqflags); 2967 bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK); 2968 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); 2969 } 2970 2971 static void ibx_irq_reset(struct drm_i915_private *dev_priv) 2972 { 2973 struct intel_uncore *uncore = &dev_priv->uncore; 2974 2975 if (HAS_PCH_NOP(dev_priv)) 2976 return; 2977 2978 GEN3_IRQ_RESET(uncore, SDE); 2979 2980 if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv)) 2981 intel_uncore_write(&dev_priv->uncore, SERR_INT, 0xffffffff); 2982 } 2983 2984 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv) 2985 { 2986 struct intel_uncore *uncore = &dev_priv->uncore; 2987 2988 if (IS_CHERRYVIEW(dev_priv)) 2989 intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK_CHV); 2990 else 2991 intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK); 2992 2993 i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0); 2994 intel_uncore_write(uncore, PORT_HOTPLUG_STAT, intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT)); 2995 2996 i9xx_pipestat_irq_reset(dev_priv); 2997 2998 GEN3_IRQ_RESET(uncore, VLV_); 2999 dev_priv->irq_mask = ~0u; 3000 } 3001 3002 static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv) 3003 { 3004 struct intel_uncore *uncore = &dev_priv->uncore; 3005 3006 u32 pipestat_mask; 3007 u32 enable_mask; 3008 enum pipe pipe; 3009 3010 pipestat_mask = PIPE_CRC_DONE_INTERRUPT_STATUS; 3011 3012 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS); 3013 for_each_pipe(dev_priv, pipe) 3014 i915_enable_pipestat(dev_priv, pipe, pipestat_mask); 3015 3016 enable_mask = I915_DISPLAY_PORT_INTERRUPT | 3017 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 3018 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 3019 I915_LPE_PIPE_A_INTERRUPT | 3020 I915_LPE_PIPE_B_INTERRUPT; 3021 3022 if (IS_CHERRYVIEW(dev_priv)) 3023 enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT | 3024 I915_LPE_PIPE_C_INTERRUPT; 3025 3026 drm_WARN_ON(&dev_priv->drm, dev_priv->irq_mask != ~0u); 3027 3028 dev_priv->irq_mask = ~enable_mask; 3029 3030 GEN3_IRQ_INIT(uncore, VLV_, dev_priv->irq_mask, enable_mask); 3031 } 3032 3033 /* drm_dma.h hooks 3034 */ 3035 static void ilk_irq_reset(struct drm_i915_private *dev_priv) 3036 { 3037 struct intel_uncore *uncore = &dev_priv->uncore; 3038 3039 GEN3_IRQ_RESET(uncore, DE); 3040 dev_priv->irq_mask = ~0u; 3041 3042 if (GRAPHICS_VER(dev_priv) == 7) 3043 intel_uncore_write(uncore, GEN7_ERR_INT, 0xffffffff); 3044 3045 if (IS_HASWELL(dev_priv)) { 3046 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff); 3047 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff); 3048 } 3049 3050 gen5_gt_irq_reset(&dev_priv->gt); 3051 3052 ibx_irq_reset(dev_priv); 3053 } 3054 3055 static void valleyview_irq_reset(struct drm_i915_private *dev_priv) 3056 { 3057 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, 0); 3058 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER); 3059 3060 gen5_gt_irq_reset(&dev_priv->gt); 3061 3062 spin_lock_irq(&dev_priv->irq_lock); 3063 if (dev_priv->display_irqs_enabled) 3064 vlv_display_irq_reset(dev_priv); 3065 spin_unlock_irq(&dev_priv->irq_lock); 3066 } 3067 3068 static void cnp_display_clock_wa(struct drm_i915_private *dev_priv) 3069 { 3070 struct intel_uncore *uncore = &dev_priv->uncore; 3071 3072 /* 3073 * Wa_14010685332:cnp/cmp,tgp,adp 3074 * TODO: Clarify which platforms this applies to 3075 * TODO: Figure out if this workaround can be applied in the s0ix suspend/resume handlers as 3076 * on earlier platforms and whether the workaround is also needed for runtime suspend/resume 3077 */ 3078 if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP || 3079 (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && INTEL_PCH_TYPE(dev_priv) < PCH_DG1)) { 3080 intel_uncore_rmw(uncore, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, 3081 SBCLK_RUN_REFCLK_DIS); 3082 intel_uncore_rmw(uncore, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, 0); 3083 } 3084 } 3085 3086 static void gen8_display_irq_reset(struct drm_i915_private *dev_priv) 3087 { 3088 struct intel_uncore *uncore = &dev_priv->uncore; 3089 enum pipe pipe; 3090 3091 if (!HAS_DISPLAY(dev_priv)) 3092 return; 3093 3094 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff); 3095 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff); 3096 3097 for_each_pipe(dev_priv, pipe) 3098 if (intel_display_power_is_enabled(dev_priv, 3099 POWER_DOMAIN_PIPE(pipe))) 3100 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe); 3101 3102 GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_); 3103 GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_); 3104 } 3105 3106 static void gen8_irq_reset(struct drm_i915_private *dev_priv) 3107 { 3108 struct intel_uncore *uncore = &dev_priv->uncore; 3109 3110 gen8_master_intr_disable(dev_priv->uncore.regs); 3111 3112 gen8_gt_irq_reset(&dev_priv->gt); 3113 gen8_display_irq_reset(dev_priv); 3114 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 3115 3116 if (HAS_PCH_SPLIT(dev_priv)) 3117 ibx_irq_reset(dev_priv); 3118 3119 cnp_display_clock_wa(dev_priv); 3120 } 3121 3122 static void gen11_display_irq_reset(struct drm_i915_private *dev_priv) 3123 { 3124 struct intel_uncore *uncore = &dev_priv->uncore; 3125 enum pipe pipe; 3126 u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) | 3127 BIT(TRANSCODER_C) | BIT(TRANSCODER_D); 3128 3129 if (!HAS_DISPLAY(dev_priv)) 3130 return; 3131 3132 intel_uncore_write(uncore, GEN11_DISPLAY_INT_CTL, 0); 3133 3134 if (DISPLAY_VER(dev_priv) >= 12) { 3135 enum transcoder trans; 3136 3137 for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) { 3138 enum intel_display_power_domain domain; 3139 3140 domain = POWER_DOMAIN_TRANSCODER(trans); 3141 if (!intel_display_power_is_enabled(dev_priv, domain)) 3142 continue; 3143 3144 intel_uncore_write(uncore, TRANS_PSR_IMR(trans), 0xffffffff); 3145 intel_uncore_write(uncore, TRANS_PSR_IIR(trans), 0xffffffff); 3146 } 3147 } else { 3148 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff); 3149 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff); 3150 } 3151 3152 for_each_pipe(dev_priv, pipe) 3153 if (intel_display_power_is_enabled(dev_priv, 3154 POWER_DOMAIN_PIPE(pipe))) 3155 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe); 3156 3157 GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_); 3158 GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_); 3159 GEN3_IRQ_RESET(uncore, GEN11_DE_HPD_); 3160 3161 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 3162 GEN3_IRQ_RESET(uncore, SDE); 3163 3164 cnp_display_clock_wa(dev_priv); 3165 } 3166 3167 static void gen11_irq_reset(struct drm_i915_private *dev_priv) 3168 { 3169 struct intel_uncore *uncore = &dev_priv->uncore; 3170 3171 if (HAS_MASTER_UNIT_IRQ(dev_priv)) 3172 dg1_master_intr_disable_and_ack(dev_priv->uncore.regs); 3173 else 3174 gen11_master_intr_disable(dev_priv->uncore.regs); 3175 3176 gen11_gt_irq_reset(&dev_priv->gt); 3177 gen11_display_irq_reset(dev_priv); 3178 3179 GEN3_IRQ_RESET(uncore, GEN11_GU_MISC_); 3180 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 3181 } 3182 3183 void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv, 3184 u8 pipe_mask) 3185 { 3186 struct intel_uncore *uncore = &dev_priv->uncore; 3187 u32 extra_ier = GEN8_PIPE_VBLANK | 3188 gen8_de_pipe_underrun_mask(dev_priv) | 3189 gen8_de_pipe_flip_done_mask(dev_priv); 3190 enum pipe pipe; 3191 3192 spin_lock_irq(&dev_priv->irq_lock); 3193 3194 if (!intel_irqs_enabled(dev_priv)) { 3195 spin_unlock_irq(&dev_priv->irq_lock); 3196 return; 3197 } 3198 3199 for_each_pipe_masked(dev_priv, pipe, pipe_mask) 3200 GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe, 3201 dev_priv->de_irq_mask[pipe], 3202 ~dev_priv->de_irq_mask[pipe] | extra_ier); 3203 3204 spin_unlock_irq(&dev_priv->irq_lock); 3205 } 3206 3207 void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv, 3208 u8 pipe_mask) 3209 { 3210 struct intel_uncore *uncore = &dev_priv->uncore; 3211 enum pipe pipe; 3212 3213 spin_lock_irq(&dev_priv->irq_lock); 3214 3215 if (!intel_irqs_enabled(dev_priv)) { 3216 spin_unlock_irq(&dev_priv->irq_lock); 3217 return; 3218 } 3219 3220 for_each_pipe_masked(dev_priv, pipe, pipe_mask) 3221 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe); 3222 3223 spin_unlock_irq(&dev_priv->irq_lock); 3224 3225 /* make sure we're done processing display irqs */ 3226 intel_synchronize_irq(dev_priv); 3227 } 3228 3229 static void cherryview_irq_reset(struct drm_i915_private *dev_priv) 3230 { 3231 struct intel_uncore *uncore = &dev_priv->uncore; 3232 3233 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, 0); 3234 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ); 3235 3236 gen8_gt_irq_reset(&dev_priv->gt); 3237 3238 GEN3_IRQ_RESET(uncore, GEN8_PCU_); 3239 3240 spin_lock_irq(&dev_priv->irq_lock); 3241 if (dev_priv->display_irqs_enabled) 3242 vlv_display_irq_reset(dev_priv); 3243 spin_unlock_irq(&dev_priv->irq_lock); 3244 } 3245 3246 static u32 ibx_hotplug_enables(struct drm_i915_private *i915, 3247 enum hpd_pin pin) 3248 { 3249 switch (pin) { 3250 case HPD_PORT_A: 3251 /* 3252 * When CPU and PCH are on the same package, port A 3253 * HPD must be enabled in both north and south. 3254 */ 3255 return HAS_PCH_LPT_LP(i915) ? 3256 PORTA_HOTPLUG_ENABLE : 0; 3257 case HPD_PORT_B: 3258 return PORTB_HOTPLUG_ENABLE | 3259 PORTB_PULSE_DURATION_2ms; 3260 case HPD_PORT_C: 3261 return PORTC_HOTPLUG_ENABLE | 3262 PORTC_PULSE_DURATION_2ms; 3263 case HPD_PORT_D: 3264 return PORTD_HOTPLUG_ENABLE | 3265 PORTD_PULSE_DURATION_2ms; 3266 default: 3267 return 0; 3268 } 3269 } 3270 3271 static void ibx_hpd_detection_setup(struct drm_i915_private *dev_priv) 3272 { 3273 u32 hotplug; 3274 3275 /* 3276 * Enable digital hotplug on the PCH, and configure the DP short pulse 3277 * duration to 2ms (which is the minimum in the Display Port spec). 3278 * The pulse duration bits are reserved on LPT+. 3279 */ 3280 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG); 3281 hotplug &= ~(PORTA_HOTPLUG_ENABLE | 3282 PORTB_HOTPLUG_ENABLE | 3283 PORTC_HOTPLUG_ENABLE | 3284 PORTD_HOTPLUG_ENABLE | 3285 PORTB_PULSE_DURATION_MASK | 3286 PORTC_PULSE_DURATION_MASK | 3287 PORTD_PULSE_DURATION_MASK); 3288 hotplug |= intel_hpd_hotplug_enables(dev_priv, ibx_hotplug_enables); 3289 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, hotplug); 3290 } 3291 3292 static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv) 3293 { 3294 u32 hotplug_irqs, enabled_irqs; 3295 3296 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd); 3297 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.pch_hpd); 3298 3299 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); 3300 3301 ibx_hpd_detection_setup(dev_priv); 3302 } 3303 3304 static u32 icp_ddi_hotplug_enables(struct drm_i915_private *i915, 3305 enum hpd_pin pin) 3306 { 3307 switch (pin) { 3308 case HPD_PORT_A: 3309 case HPD_PORT_B: 3310 case HPD_PORT_C: 3311 case HPD_PORT_D: 3312 return SHOTPLUG_CTL_DDI_HPD_ENABLE(pin); 3313 default: 3314 return 0; 3315 } 3316 } 3317 3318 static u32 icp_tc_hotplug_enables(struct drm_i915_private *i915, 3319 enum hpd_pin pin) 3320 { 3321 switch (pin) { 3322 case HPD_PORT_TC1: 3323 case HPD_PORT_TC2: 3324 case HPD_PORT_TC3: 3325 case HPD_PORT_TC4: 3326 case HPD_PORT_TC5: 3327 case HPD_PORT_TC6: 3328 return ICP_TC_HPD_ENABLE(pin); 3329 default: 3330 return 0; 3331 } 3332 } 3333 3334 static void icp_ddi_hpd_detection_setup(struct drm_i915_private *dev_priv) 3335 { 3336 u32 hotplug; 3337 3338 hotplug = intel_uncore_read(&dev_priv->uncore, SHOTPLUG_CTL_DDI); 3339 hotplug &= ~(SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_A) | 3340 SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_B) | 3341 SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_C) | 3342 SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_D)); 3343 hotplug |= intel_hpd_hotplug_enables(dev_priv, icp_ddi_hotplug_enables); 3344 intel_uncore_write(&dev_priv->uncore, SHOTPLUG_CTL_DDI, hotplug); 3345 } 3346 3347 static void icp_tc_hpd_detection_setup(struct drm_i915_private *dev_priv) 3348 { 3349 u32 hotplug; 3350 3351 hotplug = intel_uncore_read(&dev_priv->uncore, SHOTPLUG_CTL_TC); 3352 hotplug &= ~(ICP_TC_HPD_ENABLE(HPD_PORT_TC1) | 3353 ICP_TC_HPD_ENABLE(HPD_PORT_TC2) | 3354 ICP_TC_HPD_ENABLE(HPD_PORT_TC3) | 3355 ICP_TC_HPD_ENABLE(HPD_PORT_TC4) | 3356 ICP_TC_HPD_ENABLE(HPD_PORT_TC5) | 3357 ICP_TC_HPD_ENABLE(HPD_PORT_TC6)); 3358 hotplug |= intel_hpd_hotplug_enables(dev_priv, icp_tc_hotplug_enables); 3359 intel_uncore_write(&dev_priv->uncore, SHOTPLUG_CTL_TC, hotplug); 3360 } 3361 3362 static void icp_hpd_irq_setup(struct drm_i915_private *dev_priv) 3363 { 3364 u32 hotplug_irqs, enabled_irqs; 3365 3366 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd); 3367 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.pch_hpd); 3368 3369 if (INTEL_PCH_TYPE(dev_priv) <= PCH_TGP) 3370 intel_uncore_write(&dev_priv->uncore, SHPD_FILTER_CNT, SHPD_FILTER_CNT_500_ADJ); 3371 3372 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); 3373 3374 icp_ddi_hpd_detection_setup(dev_priv); 3375 icp_tc_hpd_detection_setup(dev_priv); 3376 } 3377 3378 static u32 gen11_hotplug_enables(struct drm_i915_private *i915, 3379 enum hpd_pin pin) 3380 { 3381 switch (pin) { 3382 case HPD_PORT_TC1: 3383 case HPD_PORT_TC2: 3384 case HPD_PORT_TC3: 3385 case HPD_PORT_TC4: 3386 case HPD_PORT_TC5: 3387 case HPD_PORT_TC6: 3388 return GEN11_HOTPLUG_CTL_ENABLE(pin); 3389 default: 3390 return 0; 3391 } 3392 } 3393 3394 static void dg1_hpd_irq_setup(struct drm_i915_private *dev_priv) 3395 { 3396 u32 val; 3397 3398 val = intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN1); 3399 val |= (INVERT_DDIA_HPD | 3400 INVERT_DDIB_HPD | 3401 INVERT_DDIC_HPD | 3402 INVERT_DDID_HPD); 3403 intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN1, val); 3404 3405 icp_hpd_irq_setup(dev_priv); 3406 } 3407 3408 static void gen11_tc_hpd_detection_setup(struct drm_i915_private *dev_priv) 3409 { 3410 u32 hotplug; 3411 3412 hotplug = intel_uncore_read(&dev_priv->uncore, GEN11_TC_HOTPLUG_CTL); 3413 hotplug &= ~(GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC1) | 3414 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC2) | 3415 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC3) | 3416 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC4) | 3417 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC5) | 3418 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC6)); 3419 hotplug |= intel_hpd_hotplug_enables(dev_priv, gen11_hotplug_enables); 3420 intel_uncore_write(&dev_priv->uncore, GEN11_TC_HOTPLUG_CTL, hotplug); 3421 } 3422 3423 static void gen11_tbt_hpd_detection_setup(struct drm_i915_private *dev_priv) 3424 { 3425 u32 hotplug; 3426 3427 hotplug = intel_uncore_read(&dev_priv->uncore, GEN11_TBT_HOTPLUG_CTL); 3428 hotplug &= ~(GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC1) | 3429 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC2) | 3430 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC3) | 3431 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC4) | 3432 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC5) | 3433 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC6)); 3434 hotplug |= intel_hpd_hotplug_enables(dev_priv, gen11_hotplug_enables); 3435 intel_uncore_write(&dev_priv->uncore, GEN11_TBT_HOTPLUG_CTL, hotplug); 3436 } 3437 3438 static void gen11_hpd_irq_setup(struct drm_i915_private *dev_priv) 3439 { 3440 u32 hotplug_irqs, enabled_irqs; 3441 u32 val; 3442 3443 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd); 3444 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.hpd); 3445 3446 val = intel_uncore_read(&dev_priv->uncore, GEN11_DE_HPD_IMR); 3447 val &= ~hotplug_irqs; 3448 val |= ~enabled_irqs & hotplug_irqs; 3449 intel_uncore_write(&dev_priv->uncore, GEN11_DE_HPD_IMR, val); 3450 intel_uncore_posting_read(&dev_priv->uncore, GEN11_DE_HPD_IMR); 3451 3452 gen11_tc_hpd_detection_setup(dev_priv); 3453 gen11_tbt_hpd_detection_setup(dev_priv); 3454 3455 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 3456 icp_hpd_irq_setup(dev_priv); 3457 } 3458 3459 static u32 spt_hotplug_enables(struct drm_i915_private *i915, 3460 enum hpd_pin pin) 3461 { 3462 switch (pin) { 3463 case HPD_PORT_A: 3464 return PORTA_HOTPLUG_ENABLE; 3465 case HPD_PORT_B: 3466 return PORTB_HOTPLUG_ENABLE; 3467 case HPD_PORT_C: 3468 return PORTC_HOTPLUG_ENABLE; 3469 case HPD_PORT_D: 3470 return PORTD_HOTPLUG_ENABLE; 3471 default: 3472 return 0; 3473 } 3474 } 3475 3476 static u32 spt_hotplug2_enables(struct drm_i915_private *i915, 3477 enum hpd_pin pin) 3478 { 3479 switch (pin) { 3480 case HPD_PORT_E: 3481 return PORTE_HOTPLUG_ENABLE; 3482 default: 3483 return 0; 3484 } 3485 } 3486 3487 static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv) 3488 { 3489 u32 val, hotplug; 3490 3491 /* Display WA #1179 WaHardHangonHotPlug: cnp */ 3492 if (HAS_PCH_CNP(dev_priv)) { 3493 val = intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN1); 3494 val &= ~CHASSIS_CLK_REQ_DURATION_MASK; 3495 val |= CHASSIS_CLK_REQ_DURATION(0xf); 3496 intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN1, val); 3497 } 3498 3499 /* Enable digital hotplug on the PCH */ 3500 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG); 3501 hotplug &= ~(PORTA_HOTPLUG_ENABLE | 3502 PORTB_HOTPLUG_ENABLE | 3503 PORTC_HOTPLUG_ENABLE | 3504 PORTD_HOTPLUG_ENABLE); 3505 hotplug |= intel_hpd_hotplug_enables(dev_priv, spt_hotplug_enables); 3506 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, hotplug); 3507 3508 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG2); 3509 hotplug &= ~PORTE_HOTPLUG_ENABLE; 3510 hotplug |= intel_hpd_hotplug_enables(dev_priv, spt_hotplug2_enables); 3511 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG2, hotplug); 3512 } 3513 3514 static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv) 3515 { 3516 u32 hotplug_irqs, enabled_irqs; 3517 3518 if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) 3519 intel_uncore_write(&dev_priv->uncore, SHPD_FILTER_CNT, SHPD_FILTER_CNT_500_ADJ); 3520 3521 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd); 3522 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.pch_hpd); 3523 3524 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); 3525 3526 spt_hpd_detection_setup(dev_priv); 3527 } 3528 3529 static u32 ilk_hotplug_enables(struct drm_i915_private *i915, 3530 enum hpd_pin pin) 3531 { 3532 switch (pin) { 3533 case HPD_PORT_A: 3534 return DIGITAL_PORTA_HOTPLUG_ENABLE | 3535 DIGITAL_PORTA_PULSE_DURATION_2ms; 3536 default: 3537 return 0; 3538 } 3539 } 3540 3541 static void ilk_hpd_detection_setup(struct drm_i915_private *dev_priv) 3542 { 3543 u32 hotplug; 3544 3545 /* 3546 * Enable digital hotplug on the CPU, and configure the DP short pulse 3547 * duration to 2ms (which is the minimum in the Display Port spec) 3548 * The pulse duration bits are reserved on HSW+. 3549 */ 3550 hotplug = intel_uncore_read(&dev_priv->uncore, DIGITAL_PORT_HOTPLUG_CNTRL); 3551 hotplug &= ~(DIGITAL_PORTA_HOTPLUG_ENABLE | 3552 DIGITAL_PORTA_PULSE_DURATION_MASK); 3553 hotplug |= intel_hpd_hotplug_enables(dev_priv, ilk_hotplug_enables); 3554 intel_uncore_write(&dev_priv->uncore, DIGITAL_PORT_HOTPLUG_CNTRL, hotplug); 3555 } 3556 3557 static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv) 3558 { 3559 u32 hotplug_irqs, enabled_irqs; 3560 3561 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd); 3562 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.hpd); 3563 3564 if (DISPLAY_VER(dev_priv) >= 8) 3565 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs); 3566 else 3567 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs); 3568 3569 ilk_hpd_detection_setup(dev_priv); 3570 3571 ibx_hpd_irq_setup(dev_priv); 3572 } 3573 3574 static u32 bxt_hotplug_enables(struct drm_i915_private *i915, 3575 enum hpd_pin pin) 3576 { 3577 u32 hotplug; 3578 3579 switch (pin) { 3580 case HPD_PORT_A: 3581 hotplug = PORTA_HOTPLUG_ENABLE; 3582 if (intel_bios_is_port_hpd_inverted(i915, PORT_A)) 3583 hotplug |= BXT_DDIA_HPD_INVERT; 3584 return hotplug; 3585 case HPD_PORT_B: 3586 hotplug = PORTB_HOTPLUG_ENABLE; 3587 if (intel_bios_is_port_hpd_inverted(i915, PORT_B)) 3588 hotplug |= BXT_DDIB_HPD_INVERT; 3589 return hotplug; 3590 case HPD_PORT_C: 3591 hotplug = PORTC_HOTPLUG_ENABLE; 3592 if (intel_bios_is_port_hpd_inverted(i915, PORT_C)) 3593 hotplug |= BXT_DDIC_HPD_INVERT; 3594 return hotplug; 3595 default: 3596 return 0; 3597 } 3598 } 3599 3600 static void bxt_hpd_detection_setup(struct drm_i915_private *dev_priv) 3601 { 3602 u32 hotplug; 3603 3604 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG); 3605 hotplug &= ~(PORTA_HOTPLUG_ENABLE | 3606 PORTB_HOTPLUG_ENABLE | 3607 PORTC_HOTPLUG_ENABLE | 3608 BXT_DDIA_HPD_INVERT | 3609 BXT_DDIB_HPD_INVERT | 3610 BXT_DDIC_HPD_INVERT); 3611 hotplug |= intel_hpd_hotplug_enables(dev_priv, bxt_hotplug_enables); 3612 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, hotplug); 3613 } 3614 3615 static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv) 3616 { 3617 u32 hotplug_irqs, enabled_irqs; 3618 3619 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd); 3620 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.hpd); 3621 3622 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs); 3623 3624 bxt_hpd_detection_setup(dev_priv); 3625 } 3626 3627 /* 3628 * SDEIER is also touched by the interrupt handler to work around missed PCH 3629 * interrupts. Hence we can't update it after the interrupt handler is enabled - 3630 * instead we unconditionally enable all PCH interrupt sources here, but then 3631 * only unmask them as needed with SDEIMR. 3632 * 3633 * Note that we currently do this after installing the interrupt handler, 3634 * but before we enable the master interrupt. That should be sufficient 3635 * to avoid races with the irq handler, assuming we have MSI. Shared legacy 3636 * interrupts could still race. 3637 */ 3638 static void ibx_irq_postinstall(struct drm_i915_private *dev_priv) 3639 { 3640 struct intel_uncore *uncore = &dev_priv->uncore; 3641 u32 mask; 3642 3643 if (HAS_PCH_NOP(dev_priv)) 3644 return; 3645 3646 if (HAS_PCH_IBX(dev_priv)) 3647 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON; 3648 else if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv)) 3649 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT; 3650 else 3651 mask = SDE_GMBUS_CPT; 3652 3653 GEN3_IRQ_INIT(uncore, SDE, ~mask, 0xffffffff); 3654 } 3655 3656 static void ilk_irq_postinstall(struct drm_i915_private *dev_priv) 3657 { 3658 struct intel_uncore *uncore = &dev_priv->uncore; 3659 u32 display_mask, extra_mask; 3660 3661 if (GRAPHICS_VER(dev_priv) >= 7) { 3662 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | 3663 DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB); 3664 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB | 3665 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB | 3666 DE_PLANE_FLIP_DONE_IVB(PLANE_C) | 3667 DE_PLANE_FLIP_DONE_IVB(PLANE_B) | 3668 DE_PLANE_FLIP_DONE_IVB(PLANE_A) | 3669 DE_DP_A_HOTPLUG_IVB); 3670 } else { 3671 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | 3672 DE_AUX_CHANNEL_A | DE_PIPEB_CRC_DONE | 3673 DE_PIPEA_CRC_DONE | DE_POISON); 3674 extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | 3675 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN | 3676 DE_PLANE_FLIP_DONE(PLANE_A) | 3677 DE_PLANE_FLIP_DONE(PLANE_B) | 3678 DE_DP_A_HOTPLUG); 3679 } 3680 3681 if (IS_HASWELL(dev_priv)) { 3682 gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR); 3683 display_mask |= DE_EDP_PSR_INT_HSW; 3684 } 3685 3686 if (IS_IRONLAKE_M(dev_priv)) 3687 extra_mask |= DE_PCU_EVENT; 3688 3689 dev_priv->irq_mask = ~display_mask; 3690 3691 ibx_irq_postinstall(dev_priv); 3692 3693 gen5_gt_irq_postinstall(&dev_priv->gt); 3694 3695 GEN3_IRQ_INIT(uncore, DE, dev_priv->irq_mask, 3696 display_mask | extra_mask); 3697 } 3698 3699 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv) 3700 { 3701 lockdep_assert_held(&dev_priv->irq_lock); 3702 3703 if (dev_priv->display_irqs_enabled) 3704 return; 3705 3706 dev_priv->display_irqs_enabled = true; 3707 3708 if (intel_irqs_enabled(dev_priv)) { 3709 vlv_display_irq_reset(dev_priv); 3710 vlv_display_irq_postinstall(dev_priv); 3711 } 3712 } 3713 3714 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv) 3715 { 3716 lockdep_assert_held(&dev_priv->irq_lock); 3717 3718 if (!dev_priv->display_irqs_enabled) 3719 return; 3720 3721 dev_priv->display_irqs_enabled = false; 3722 3723 if (intel_irqs_enabled(dev_priv)) 3724 vlv_display_irq_reset(dev_priv); 3725 } 3726 3727 3728 static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv) 3729 { 3730 gen5_gt_irq_postinstall(&dev_priv->gt); 3731 3732 spin_lock_irq(&dev_priv->irq_lock); 3733 if (dev_priv->display_irqs_enabled) 3734 vlv_display_irq_postinstall(dev_priv); 3735 spin_unlock_irq(&dev_priv->irq_lock); 3736 3737 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); 3738 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER); 3739 } 3740 3741 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) 3742 { 3743 struct intel_uncore *uncore = &dev_priv->uncore; 3744 3745 u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) | 3746 GEN8_PIPE_CDCLK_CRC_DONE; 3747 u32 de_pipe_enables; 3748 u32 de_port_masked = gen8_de_port_aux_mask(dev_priv); 3749 u32 de_port_enables; 3750 u32 de_misc_masked = GEN8_DE_EDP_PSR; 3751 u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) | 3752 BIT(TRANSCODER_C) | BIT(TRANSCODER_D); 3753 enum pipe pipe; 3754 3755 if (!HAS_DISPLAY(dev_priv)) 3756 return; 3757 3758 if (DISPLAY_VER(dev_priv) <= 10) 3759 de_misc_masked |= GEN8_DE_MISC_GSE; 3760 3761 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 3762 de_port_masked |= BXT_DE_PORT_GMBUS; 3763 3764 if (DISPLAY_VER(dev_priv) >= 11) { 3765 enum port port; 3766 3767 if (intel_bios_is_dsi_present(dev_priv, &port)) 3768 de_port_masked |= DSI0_TE | DSI1_TE; 3769 } 3770 3771 de_pipe_enables = de_pipe_masked | 3772 GEN8_PIPE_VBLANK | 3773 gen8_de_pipe_underrun_mask(dev_priv) | 3774 gen8_de_pipe_flip_done_mask(dev_priv); 3775 3776 de_port_enables = de_port_masked; 3777 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 3778 de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK; 3779 else if (IS_BROADWELL(dev_priv)) 3780 de_port_enables |= BDW_DE_PORT_HOTPLUG_MASK; 3781 3782 if (DISPLAY_VER(dev_priv) >= 12) { 3783 enum transcoder trans; 3784 3785 for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) { 3786 enum intel_display_power_domain domain; 3787 3788 domain = POWER_DOMAIN_TRANSCODER(trans); 3789 if (!intel_display_power_is_enabled(dev_priv, domain)) 3790 continue; 3791 3792 gen3_assert_iir_is_zero(uncore, TRANS_PSR_IIR(trans)); 3793 } 3794 } else { 3795 gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR); 3796 } 3797 3798 for_each_pipe(dev_priv, pipe) { 3799 dev_priv->de_irq_mask[pipe] = ~de_pipe_masked; 3800 3801 if (intel_display_power_is_enabled(dev_priv, 3802 POWER_DOMAIN_PIPE(pipe))) 3803 GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe, 3804 dev_priv->de_irq_mask[pipe], 3805 de_pipe_enables); 3806 } 3807 3808 GEN3_IRQ_INIT(uncore, GEN8_DE_PORT_, ~de_port_masked, de_port_enables); 3809 GEN3_IRQ_INIT(uncore, GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked); 3810 3811 if (DISPLAY_VER(dev_priv) >= 11) { 3812 u32 de_hpd_masked = 0; 3813 u32 de_hpd_enables = GEN11_DE_TC_HOTPLUG_MASK | 3814 GEN11_DE_TBT_HOTPLUG_MASK; 3815 3816 GEN3_IRQ_INIT(uncore, GEN11_DE_HPD_, ~de_hpd_masked, 3817 de_hpd_enables); 3818 } 3819 } 3820 3821 static void icp_irq_postinstall(struct drm_i915_private *dev_priv) 3822 { 3823 struct intel_uncore *uncore = &dev_priv->uncore; 3824 u32 mask = SDE_GMBUS_ICP; 3825 3826 GEN3_IRQ_INIT(uncore, SDE, ~mask, 0xffffffff); 3827 } 3828 3829 static void gen8_irq_postinstall(struct drm_i915_private *dev_priv) 3830 { 3831 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 3832 icp_irq_postinstall(dev_priv); 3833 else if (HAS_PCH_SPLIT(dev_priv)) 3834 ibx_irq_postinstall(dev_priv); 3835 3836 gen8_gt_irq_postinstall(&dev_priv->gt); 3837 gen8_de_irq_postinstall(dev_priv); 3838 3839 gen8_master_intr_enable(dev_priv->uncore.regs); 3840 } 3841 3842 static void gen11_de_irq_postinstall(struct drm_i915_private *dev_priv) 3843 { 3844 if (!HAS_DISPLAY(dev_priv)) 3845 return; 3846 3847 gen8_de_irq_postinstall(dev_priv); 3848 3849 intel_uncore_write(&dev_priv->uncore, GEN11_DISPLAY_INT_CTL, 3850 GEN11_DISPLAY_IRQ_ENABLE); 3851 } 3852 3853 static void gen11_irq_postinstall(struct drm_i915_private *dev_priv) 3854 { 3855 struct intel_uncore *uncore = &dev_priv->uncore; 3856 u32 gu_misc_masked = GEN11_GU_MISC_GSE; 3857 3858 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 3859 icp_irq_postinstall(dev_priv); 3860 3861 gen11_gt_irq_postinstall(&dev_priv->gt); 3862 gen11_de_irq_postinstall(dev_priv); 3863 3864 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked); 3865 3866 if (HAS_MASTER_UNIT_IRQ(dev_priv)) { 3867 dg1_master_intr_enable(uncore->regs); 3868 intel_uncore_posting_read(&dev_priv->uncore, DG1_MSTR_UNIT_INTR); 3869 } else { 3870 gen11_master_intr_enable(uncore->regs); 3871 intel_uncore_posting_read(&dev_priv->uncore, GEN11_GFX_MSTR_IRQ); 3872 } 3873 } 3874 3875 static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv) 3876 { 3877 gen8_gt_irq_postinstall(&dev_priv->gt); 3878 3879 spin_lock_irq(&dev_priv->irq_lock); 3880 if (dev_priv->display_irqs_enabled) 3881 vlv_display_irq_postinstall(dev_priv); 3882 spin_unlock_irq(&dev_priv->irq_lock); 3883 3884 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL); 3885 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ); 3886 } 3887 3888 static void i8xx_irq_reset(struct drm_i915_private *dev_priv) 3889 { 3890 struct intel_uncore *uncore = &dev_priv->uncore; 3891 3892 i9xx_pipestat_irq_reset(dev_priv); 3893 3894 GEN2_IRQ_RESET(uncore); 3895 dev_priv->irq_mask = ~0u; 3896 } 3897 3898 static void i8xx_irq_postinstall(struct drm_i915_private *dev_priv) 3899 { 3900 struct intel_uncore *uncore = &dev_priv->uncore; 3901 u16 enable_mask; 3902 3903 intel_uncore_write16(uncore, 3904 EMR, 3905 ~(I915_ERROR_PAGE_TABLE | 3906 I915_ERROR_MEMORY_REFRESH)); 3907 3908 /* Unmask the interrupts that we always want on. */ 3909 dev_priv->irq_mask = 3910 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 3911 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 3912 I915_MASTER_ERROR_INTERRUPT); 3913 3914 enable_mask = 3915 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 3916 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 3917 I915_MASTER_ERROR_INTERRUPT | 3918 I915_USER_INTERRUPT; 3919 3920 GEN2_IRQ_INIT(uncore, dev_priv->irq_mask, enable_mask); 3921 3922 /* Interrupt setup is already guaranteed to be single-threaded, this is 3923 * just to make the assert_spin_locked check happy. */ 3924 spin_lock_irq(&dev_priv->irq_lock); 3925 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 3926 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 3927 spin_unlock_irq(&dev_priv->irq_lock); 3928 } 3929 3930 static void i8xx_error_irq_ack(struct drm_i915_private *i915, 3931 u16 *eir, u16 *eir_stuck) 3932 { 3933 struct intel_uncore *uncore = &i915->uncore; 3934 u16 emr; 3935 3936 *eir = intel_uncore_read16(uncore, EIR); 3937 3938 if (*eir) 3939 intel_uncore_write16(uncore, EIR, *eir); 3940 3941 *eir_stuck = intel_uncore_read16(uncore, EIR); 3942 if (*eir_stuck == 0) 3943 return; 3944 3945 /* 3946 * Toggle all EMR bits to make sure we get an edge 3947 * in the ISR master error bit if we don't clear 3948 * all the EIR bits. Otherwise the edge triggered 3949 * IIR on i965/g4x wouldn't notice that an interrupt 3950 * is still pending. Also some EIR bits can't be 3951 * cleared except by handling the underlying error 3952 * (or by a GPU reset) so we mask any bit that 3953 * remains set. 3954 */ 3955 emr = intel_uncore_read16(uncore, EMR); 3956 intel_uncore_write16(uncore, EMR, 0xffff); 3957 intel_uncore_write16(uncore, EMR, emr | *eir_stuck); 3958 } 3959 3960 static void i8xx_error_irq_handler(struct drm_i915_private *dev_priv, 3961 u16 eir, u16 eir_stuck) 3962 { 3963 DRM_DEBUG("Master Error: EIR 0x%04x\n", eir); 3964 3965 if (eir_stuck) 3966 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%04x, masked\n", 3967 eir_stuck); 3968 } 3969 3970 static void i9xx_error_irq_ack(struct drm_i915_private *dev_priv, 3971 u32 *eir, u32 *eir_stuck) 3972 { 3973 u32 emr; 3974 3975 *eir = intel_uncore_read(&dev_priv->uncore, EIR); 3976 3977 intel_uncore_write(&dev_priv->uncore, EIR, *eir); 3978 3979 *eir_stuck = intel_uncore_read(&dev_priv->uncore, EIR); 3980 if (*eir_stuck == 0) 3981 return; 3982 3983 /* 3984 * Toggle all EMR bits to make sure we get an edge 3985 * in the ISR master error bit if we don't clear 3986 * all the EIR bits. Otherwise the edge triggered 3987 * IIR on i965/g4x wouldn't notice that an interrupt 3988 * is still pending. Also some EIR bits can't be 3989 * cleared except by handling the underlying error 3990 * (or by a GPU reset) so we mask any bit that 3991 * remains set. 3992 */ 3993 emr = intel_uncore_read(&dev_priv->uncore, EMR); 3994 intel_uncore_write(&dev_priv->uncore, EMR, 0xffffffff); 3995 intel_uncore_write(&dev_priv->uncore, EMR, emr | *eir_stuck); 3996 } 3997 3998 static void i9xx_error_irq_handler(struct drm_i915_private *dev_priv, 3999 u32 eir, u32 eir_stuck) 4000 { 4001 DRM_DEBUG("Master Error, EIR 0x%08x\n", eir); 4002 4003 if (eir_stuck) 4004 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%08x, masked\n", 4005 eir_stuck); 4006 } 4007 4008 static irqreturn_t i8xx_irq_handler(int irq, void *arg) 4009 { 4010 struct drm_i915_private *dev_priv = arg; 4011 irqreturn_t ret = IRQ_NONE; 4012 4013 if (!intel_irqs_enabled(dev_priv)) 4014 return IRQ_NONE; 4015 4016 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 4017 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 4018 4019 do { 4020 u32 pipe_stats[I915_MAX_PIPES] = {}; 4021 u16 eir = 0, eir_stuck = 0; 4022 u16 iir; 4023 4024 iir = intel_uncore_read16(&dev_priv->uncore, GEN2_IIR); 4025 if (iir == 0) 4026 break; 4027 4028 ret = IRQ_HANDLED; 4029 4030 /* Call regardless, as some status bits might not be 4031 * signalled in iir */ 4032 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 4033 4034 if (iir & I915_MASTER_ERROR_INTERRUPT) 4035 i8xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 4036 4037 intel_uncore_write16(&dev_priv->uncore, GEN2_IIR, iir); 4038 4039 if (iir & I915_USER_INTERRUPT) 4040 intel_engine_cs_irq(dev_priv->gt.engine[RCS0], iir); 4041 4042 if (iir & I915_MASTER_ERROR_INTERRUPT) 4043 i8xx_error_irq_handler(dev_priv, eir, eir_stuck); 4044 4045 i8xx_pipestat_irq_handler(dev_priv, iir, pipe_stats); 4046 } while (0); 4047 4048 pmu_irq_stats(dev_priv, ret); 4049 4050 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 4051 4052 return ret; 4053 } 4054 4055 static void i915_irq_reset(struct drm_i915_private *dev_priv) 4056 { 4057 struct intel_uncore *uncore = &dev_priv->uncore; 4058 4059 if (I915_HAS_HOTPLUG(dev_priv)) { 4060 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0); 4061 intel_uncore_write(&dev_priv->uncore, PORT_HOTPLUG_STAT, intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT)); 4062 } 4063 4064 i9xx_pipestat_irq_reset(dev_priv); 4065 4066 GEN3_IRQ_RESET(uncore, GEN2_); 4067 dev_priv->irq_mask = ~0u; 4068 } 4069 4070 static void i915_irq_postinstall(struct drm_i915_private *dev_priv) 4071 { 4072 struct intel_uncore *uncore = &dev_priv->uncore; 4073 u32 enable_mask; 4074 4075 intel_uncore_write(&dev_priv->uncore, EMR, ~(I915_ERROR_PAGE_TABLE | 4076 I915_ERROR_MEMORY_REFRESH)); 4077 4078 /* Unmask the interrupts that we always want on. */ 4079 dev_priv->irq_mask = 4080 ~(I915_ASLE_INTERRUPT | 4081 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 4082 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 4083 I915_MASTER_ERROR_INTERRUPT); 4084 4085 enable_mask = 4086 I915_ASLE_INTERRUPT | 4087 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 4088 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 4089 I915_MASTER_ERROR_INTERRUPT | 4090 I915_USER_INTERRUPT; 4091 4092 if (I915_HAS_HOTPLUG(dev_priv)) { 4093 /* Enable in IER... */ 4094 enable_mask |= I915_DISPLAY_PORT_INTERRUPT; 4095 /* and unmask in IMR */ 4096 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; 4097 } 4098 4099 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask); 4100 4101 /* Interrupt setup is already guaranteed to be single-threaded, this is 4102 * just to make the assert_spin_locked check happy. */ 4103 spin_lock_irq(&dev_priv->irq_lock); 4104 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 4105 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 4106 spin_unlock_irq(&dev_priv->irq_lock); 4107 4108 i915_enable_asle_pipestat(dev_priv); 4109 } 4110 4111 static irqreturn_t i915_irq_handler(int irq, void *arg) 4112 { 4113 struct drm_i915_private *dev_priv = arg; 4114 irqreturn_t ret = IRQ_NONE; 4115 4116 if (!intel_irqs_enabled(dev_priv)) 4117 return IRQ_NONE; 4118 4119 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 4120 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 4121 4122 do { 4123 u32 pipe_stats[I915_MAX_PIPES] = {}; 4124 u32 eir = 0, eir_stuck = 0; 4125 u32 hotplug_status = 0; 4126 u32 iir; 4127 4128 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR); 4129 if (iir == 0) 4130 break; 4131 4132 ret = IRQ_HANDLED; 4133 4134 if (I915_HAS_HOTPLUG(dev_priv) && 4135 iir & I915_DISPLAY_PORT_INTERRUPT) 4136 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 4137 4138 /* Call regardless, as some status bits might not be 4139 * signalled in iir */ 4140 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 4141 4142 if (iir & I915_MASTER_ERROR_INTERRUPT) 4143 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 4144 4145 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir); 4146 4147 if (iir & I915_USER_INTERRUPT) 4148 intel_engine_cs_irq(dev_priv->gt.engine[RCS0], iir); 4149 4150 if (iir & I915_MASTER_ERROR_INTERRUPT) 4151 i9xx_error_irq_handler(dev_priv, eir, eir_stuck); 4152 4153 if (hotplug_status) 4154 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 4155 4156 i915_pipestat_irq_handler(dev_priv, iir, pipe_stats); 4157 } while (0); 4158 4159 pmu_irq_stats(dev_priv, ret); 4160 4161 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 4162 4163 return ret; 4164 } 4165 4166 static void i965_irq_reset(struct drm_i915_private *dev_priv) 4167 { 4168 struct intel_uncore *uncore = &dev_priv->uncore; 4169 4170 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0); 4171 intel_uncore_write(&dev_priv->uncore, PORT_HOTPLUG_STAT, intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT)); 4172 4173 i9xx_pipestat_irq_reset(dev_priv); 4174 4175 GEN3_IRQ_RESET(uncore, GEN2_); 4176 dev_priv->irq_mask = ~0u; 4177 } 4178 4179 static void i965_irq_postinstall(struct drm_i915_private *dev_priv) 4180 { 4181 struct intel_uncore *uncore = &dev_priv->uncore; 4182 u32 enable_mask; 4183 u32 error_mask; 4184 4185 /* 4186 * Enable some error detection, note the instruction error mask 4187 * bit is reserved, so we leave it masked. 4188 */ 4189 if (IS_G4X(dev_priv)) { 4190 error_mask = ~(GM45_ERROR_PAGE_TABLE | 4191 GM45_ERROR_MEM_PRIV | 4192 GM45_ERROR_CP_PRIV | 4193 I915_ERROR_MEMORY_REFRESH); 4194 } else { 4195 error_mask = ~(I915_ERROR_PAGE_TABLE | 4196 I915_ERROR_MEMORY_REFRESH); 4197 } 4198 intel_uncore_write(&dev_priv->uncore, EMR, error_mask); 4199 4200 /* Unmask the interrupts that we always want on. */ 4201 dev_priv->irq_mask = 4202 ~(I915_ASLE_INTERRUPT | 4203 I915_DISPLAY_PORT_INTERRUPT | 4204 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 4205 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 4206 I915_MASTER_ERROR_INTERRUPT); 4207 4208 enable_mask = 4209 I915_ASLE_INTERRUPT | 4210 I915_DISPLAY_PORT_INTERRUPT | 4211 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | 4212 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | 4213 I915_MASTER_ERROR_INTERRUPT | 4214 I915_USER_INTERRUPT; 4215 4216 if (IS_G4X(dev_priv)) 4217 enable_mask |= I915_BSD_USER_INTERRUPT; 4218 4219 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask); 4220 4221 /* Interrupt setup is already guaranteed to be single-threaded, this is 4222 * just to make the assert_spin_locked check happy. */ 4223 spin_lock_irq(&dev_priv->irq_lock); 4224 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS); 4225 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS); 4226 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS); 4227 spin_unlock_irq(&dev_priv->irq_lock); 4228 4229 i915_enable_asle_pipestat(dev_priv); 4230 } 4231 4232 static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv) 4233 { 4234 u32 hotplug_en; 4235 4236 lockdep_assert_held(&dev_priv->irq_lock); 4237 4238 /* Note HDMI and DP share hotplug bits */ 4239 /* enable bits are the same for all generations */ 4240 hotplug_en = intel_hpd_enabled_irqs(dev_priv, hpd_mask_i915); 4241 /* Programming the CRT detection parameters tends 4242 to generate a spurious hotplug event about three 4243 seconds later. So just do it once. 4244 */ 4245 if (IS_G4X(dev_priv)) 4246 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; 4247 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; 4248 4249 /* Ignore TV since it's buggy */ 4250 i915_hotplug_interrupt_update_locked(dev_priv, 4251 HOTPLUG_INT_EN_MASK | 4252 CRT_HOTPLUG_VOLTAGE_COMPARE_MASK | 4253 CRT_HOTPLUG_ACTIVATION_PERIOD_64, 4254 hotplug_en); 4255 } 4256 4257 static irqreturn_t i965_irq_handler(int irq, void *arg) 4258 { 4259 struct drm_i915_private *dev_priv = arg; 4260 irqreturn_t ret = IRQ_NONE; 4261 4262 if (!intel_irqs_enabled(dev_priv)) 4263 return IRQ_NONE; 4264 4265 /* IRQs are synced during runtime_suspend, we don't require a wakeref */ 4266 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 4267 4268 do { 4269 u32 pipe_stats[I915_MAX_PIPES] = {}; 4270 u32 eir = 0, eir_stuck = 0; 4271 u32 hotplug_status = 0; 4272 u32 iir; 4273 4274 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR); 4275 if (iir == 0) 4276 break; 4277 4278 ret = IRQ_HANDLED; 4279 4280 if (iir & I915_DISPLAY_PORT_INTERRUPT) 4281 hotplug_status = i9xx_hpd_irq_ack(dev_priv); 4282 4283 /* Call regardless, as some status bits might not be 4284 * signalled in iir */ 4285 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats); 4286 4287 if (iir & I915_MASTER_ERROR_INTERRUPT) 4288 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck); 4289 4290 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir); 4291 4292 if (iir & I915_USER_INTERRUPT) 4293 intel_engine_cs_irq(dev_priv->gt.engine[RCS0], 4294 iir); 4295 4296 if (iir & I915_BSD_USER_INTERRUPT) 4297 intel_engine_cs_irq(dev_priv->gt.engine[VCS0], 4298 iir >> 25); 4299 4300 if (iir & I915_MASTER_ERROR_INTERRUPT) 4301 i9xx_error_irq_handler(dev_priv, eir, eir_stuck); 4302 4303 if (hotplug_status) 4304 i9xx_hpd_irq_handler(dev_priv, hotplug_status); 4305 4306 i965_pipestat_irq_handler(dev_priv, iir, pipe_stats); 4307 } while (0); 4308 4309 pmu_irq_stats(dev_priv, IRQ_HANDLED); 4310 4311 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); 4312 4313 return ret; 4314 } 4315 4316 /** 4317 * intel_irq_init - initializes irq support 4318 * @dev_priv: i915 device instance 4319 * 4320 * This function initializes all the irq support including work items, timers 4321 * and all the vtables. It does not setup the interrupt itself though. 4322 */ 4323 void intel_irq_init(struct drm_i915_private *dev_priv) 4324 { 4325 struct drm_device *dev = &dev_priv->drm; 4326 int i; 4327 4328 INIT_WORK(&dev_priv->l3_parity.error_work, ivb_parity_work); 4329 for (i = 0; i < MAX_L3_SLICES; ++i) 4330 dev_priv->l3_parity.remap_info[i] = NULL; 4331 4332 /* pre-gen11 the guc irqs bits are in the upper 16 bits of the pm reg */ 4333 if (HAS_GT_UC(dev_priv) && GRAPHICS_VER(dev_priv) < 11) 4334 dev_priv->gt.pm_guc_events = GUC_INTR_GUC2HOST << 16; 4335 4336 if (!HAS_DISPLAY(dev_priv)) 4337 return; 4338 4339 intel_hpd_init_pins(dev_priv); 4340 4341 intel_hpd_init_work(dev_priv); 4342 4343 dev->vblank_disable_immediate = true; 4344 4345 /* Most platforms treat the display irq block as an always-on 4346 * power domain. vlv/chv can disable it at runtime and need 4347 * special care to avoid writing any of the display block registers 4348 * outside of the power domain. We defer setting up the display irqs 4349 * in this case to the runtime pm. 4350 */ 4351 dev_priv->display_irqs_enabled = true; 4352 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) 4353 dev_priv->display_irqs_enabled = false; 4354 4355 dev_priv->hotplug.hpd_storm_threshold = HPD_STORM_DEFAULT_THRESHOLD; 4356 /* If we have MST support, we want to avoid doing short HPD IRQ storm 4357 * detection, as short HPD storms will occur as a natural part of 4358 * sideband messaging with MST. 4359 * On older platforms however, IRQ storms can occur with both long and 4360 * short pulses, as seen on some G4x systems. 4361 */ 4362 dev_priv->hotplug.hpd_short_storm_enabled = !HAS_DP_MST(dev_priv); 4363 4364 if (HAS_GMCH(dev_priv)) { 4365 if (I915_HAS_HOTPLUG(dev_priv)) 4366 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; 4367 } else { 4368 if (HAS_PCH_DG1(dev_priv)) 4369 dev_priv->display.hpd_irq_setup = dg1_hpd_irq_setup; 4370 else if (DISPLAY_VER(dev_priv) >= 11) 4371 dev_priv->display.hpd_irq_setup = gen11_hpd_irq_setup; 4372 else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 4373 dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup; 4374 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) 4375 dev_priv->display.hpd_irq_setup = icp_hpd_irq_setup; 4376 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT) 4377 dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup; 4378 else 4379 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup; 4380 } 4381 } 4382 4383 /** 4384 * intel_irq_fini - deinitializes IRQ support 4385 * @i915: i915 device instance 4386 * 4387 * This function deinitializes all the IRQ support. 4388 */ 4389 void intel_irq_fini(struct drm_i915_private *i915) 4390 { 4391 int i; 4392 4393 for (i = 0; i < MAX_L3_SLICES; ++i) 4394 kfree(i915->l3_parity.remap_info[i]); 4395 } 4396 4397 static irq_handler_t intel_irq_handler(struct drm_i915_private *dev_priv) 4398 { 4399 if (HAS_GMCH(dev_priv)) { 4400 if (IS_CHERRYVIEW(dev_priv)) 4401 return cherryview_irq_handler; 4402 else if (IS_VALLEYVIEW(dev_priv)) 4403 return valleyview_irq_handler; 4404 else if (GRAPHICS_VER(dev_priv) == 4) 4405 return i965_irq_handler; 4406 else if (GRAPHICS_VER(dev_priv) == 3) 4407 return i915_irq_handler; 4408 else 4409 return i8xx_irq_handler; 4410 } else { 4411 if (HAS_MASTER_UNIT_IRQ(dev_priv)) 4412 return dg1_irq_handler; 4413 if (GRAPHICS_VER(dev_priv) >= 11) 4414 return gen11_irq_handler; 4415 else if (GRAPHICS_VER(dev_priv) >= 8) 4416 return gen8_irq_handler; 4417 else 4418 return ilk_irq_handler; 4419 } 4420 } 4421 4422 static void intel_irq_reset(struct drm_i915_private *dev_priv) 4423 { 4424 if (HAS_GMCH(dev_priv)) { 4425 if (IS_CHERRYVIEW(dev_priv)) 4426 cherryview_irq_reset(dev_priv); 4427 else if (IS_VALLEYVIEW(dev_priv)) 4428 valleyview_irq_reset(dev_priv); 4429 else if (GRAPHICS_VER(dev_priv) == 4) 4430 i965_irq_reset(dev_priv); 4431 else if (GRAPHICS_VER(dev_priv) == 3) 4432 i915_irq_reset(dev_priv); 4433 else 4434 i8xx_irq_reset(dev_priv); 4435 } else { 4436 if (GRAPHICS_VER(dev_priv) >= 11) 4437 gen11_irq_reset(dev_priv); 4438 else if (GRAPHICS_VER(dev_priv) >= 8) 4439 gen8_irq_reset(dev_priv); 4440 else 4441 ilk_irq_reset(dev_priv); 4442 } 4443 } 4444 4445 static void intel_irq_postinstall(struct drm_i915_private *dev_priv) 4446 { 4447 if (HAS_GMCH(dev_priv)) { 4448 if (IS_CHERRYVIEW(dev_priv)) 4449 cherryview_irq_postinstall(dev_priv); 4450 else if (IS_VALLEYVIEW(dev_priv)) 4451 valleyview_irq_postinstall(dev_priv); 4452 else if (GRAPHICS_VER(dev_priv) == 4) 4453 i965_irq_postinstall(dev_priv); 4454 else if (GRAPHICS_VER(dev_priv) == 3) 4455 i915_irq_postinstall(dev_priv); 4456 else 4457 i8xx_irq_postinstall(dev_priv); 4458 } else { 4459 if (GRAPHICS_VER(dev_priv) >= 11) 4460 gen11_irq_postinstall(dev_priv); 4461 else if (GRAPHICS_VER(dev_priv) >= 8) 4462 gen8_irq_postinstall(dev_priv); 4463 else 4464 ilk_irq_postinstall(dev_priv); 4465 } 4466 } 4467 4468 /** 4469 * intel_irq_install - enables the hardware interrupt 4470 * @dev_priv: i915 device instance 4471 * 4472 * This function enables the hardware interrupt handling, but leaves the hotplug 4473 * handling still disabled. It is called after intel_irq_init(). 4474 * 4475 * In the driver load and resume code we need working interrupts in a few places 4476 * but don't want to deal with the hassle of concurrent probe and hotplug 4477 * workers. Hence the split into this two-stage approach. 4478 */ 4479 int intel_irq_install(struct drm_i915_private *dev_priv) 4480 { 4481 int irq = to_pci_dev(dev_priv->drm.dev)->irq; 4482 int ret; 4483 4484 /* 4485 * We enable some interrupt sources in our postinstall hooks, so mark 4486 * interrupts as enabled _before_ actually enabling them to avoid 4487 * special cases in our ordering checks. 4488 */ 4489 dev_priv->runtime_pm.irqs_enabled = true; 4490 4491 dev_priv->drm.irq_enabled = true; 4492 4493 intel_irq_reset(dev_priv); 4494 4495 ret = request_irq(irq, intel_irq_handler(dev_priv), 4496 IRQF_SHARED, DRIVER_NAME, dev_priv); 4497 if (ret < 0) { 4498 dev_priv->drm.irq_enabled = false; 4499 return ret; 4500 } 4501 4502 intel_irq_postinstall(dev_priv); 4503 4504 return ret; 4505 } 4506 4507 /** 4508 * intel_irq_uninstall - finilizes all irq handling 4509 * @dev_priv: i915 device instance 4510 * 4511 * This stops interrupt and hotplug handling and unregisters and frees all 4512 * resources acquired in the init functions. 4513 */ 4514 void intel_irq_uninstall(struct drm_i915_private *dev_priv) 4515 { 4516 int irq = to_pci_dev(dev_priv->drm.dev)->irq; 4517 4518 /* 4519 * FIXME we can get called twice during driver probe 4520 * error handling as well as during driver remove due to 4521 * intel_modeset_driver_remove() calling us out of sequence. 4522 * Would be nice if it didn't do that... 4523 */ 4524 if (!dev_priv->drm.irq_enabled) 4525 return; 4526 4527 dev_priv->drm.irq_enabled = false; 4528 4529 intel_irq_reset(dev_priv); 4530 4531 free_irq(irq, dev_priv); 4532 4533 intel_hpd_cancel_work(dev_priv); 4534 dev_priv->runtime_pm.irqs_enabled = false; 4535 } 4536 4537 /** 4538 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling 4539 * @dev_priv: i915 device instance 4540 * 4541 * This function is used to disable interrupts at runtime, both in the runtime 4542 * pm and the system suspend/resume code. 4543 */ 4544 void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv) 4545 { 4546 intel_irq_reset(dev_priv); 4547 dev_priv->runtime_pm.irqs_enabled = false; 4548 intel_synchronize_irq(dev_priv); 4549 } 4550 4551 /** 4552 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling 4553 * @dev_priv: i915 device instance 4554 * 4555 * This function is used to enable interrupts at runtime, both in the runtime 4556 * pm and the system suspend/resume code. 4557 */ 4558 void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv) 4559 { 4560 dev_priv->runtime_pm.irqs_enabled = true; 4561 intel_irq_reset(dev_priv); 4562 intel_irq_postinstall(dev_priv); 4563 } 4564 4565 bool intel_irqs_enabled(struct drm_i915_private *dev_priv) 4566 { 4567 /* 4568 * We only use drm_irq_uninstall() at unload and VT switch, so 4569 * this is the only thing we need to check. 4570 */ 4571 return dev_priv->runtime_pm.irqs_enabled; 4572 } 4573 4574 void intel_synchronize_irq(struct drm_i915_private *i915) 4575 { 4576 synchronize_irq(to_pci_dev(i915->drm.dev)->irq); 4577 } 4578