drivers/gpu/drm/i915/i915_irq.c

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