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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
37#include "display/intel_de.h"
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 */
68static 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
81typedef bool (*long_pulse_detect_func)(enum hpd_pin pin, u32 val);
82typedef u32 (*hotplug_enables_func)(struct drm_i915_private *i915,
83 enum hpd_pin pin);
84
85static const u32 hpd_ilk[HPD_NUM_PINS] = {
86 [HPD_PORT_A] = DE_DP_A_HOTPLUG,
87};
88
89static const u32 hpd_ivb[HPD_NUM_PINS] = {
90 [HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,
91};
92
93static const u32 hpd_bdw[HPD_NUM_PINS] = {
94 [HPD_PORT_A] = GEN8_DE_PORT_HOTPLUG(HPD_PORT_A),
95};
96
97static 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
105static 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
113static 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
121static 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
130static 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
139static 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
148static 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
154static 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
163static 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
175static 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
182static 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
224static void
225intel_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
232void 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
247void 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 */
264static 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
280static 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
296void 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
308void 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 */
319static inline void
320i915_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 */
347void 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 */
362void 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 */
389static 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 */
422void 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 */
453void 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
472u32 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
506out:
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
516void 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
539void 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
562static 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 */
574static 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 */
642u32 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
708u32 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
720static 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 */
767static 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 */
787static 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 (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
846static 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) || 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
979bool 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
987int 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 */
1009static 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
1074out:
1075 drm_WARN_ON(&dev_priv->drm, dev_priv->l3_parity.which_slice);
1076 spin_lock_irq(>->irq_lock);
1077 gen5_gt_enable_irq(gt, GT_PARITY_ERROR(dev_priv));
1078 spin_unlock_irq(>->irq_lock);
1079
1080 mutex_unlock(&dev_priv->drm.struct_mutex);
1081}
1082
1083static 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
1098static 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
1112static 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
1125static 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
1140static 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
1150static 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
1166static 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
1176static 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
1190static 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 */
1211static 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
1237static 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
1250static 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
1262static 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
1274static void gmbus_irq_handler(struct drm_i915_private *dev_priv)
1275{
1276 wake_up_all(&dev_priv->gmbus_wait_queue);
1277}
1278
1279static 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)
1285static 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
1319static inline void
1320display_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
1327static 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
1345static 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
1353static 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
1364static 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
1386static 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
1399static 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
1465static 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
1482static 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
1506static 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
1533static 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
1556static 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
1594static 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
1621static 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
1708static 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
1787static 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
1819static 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
1869static 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
1892static 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
1907static 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
1944static 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
1981static 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
2019static 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
2035static 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 (DISPLAY_VER(dev_priv) == 5 && de_iir & DE_PCU_EVENT)
2081 gen5_rps_irq_handler(&dev_priv->gt.rps);
2082}
2083
2084static 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 */
2145static 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 (GRAPHICS_VER(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 (GRAPHICS_VER(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
2215static 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
2231static 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
2268static u32 gen8_de_port_aux_mask(struct drm_i915_private *dev_priv)
2269{
2270 u32 mask;
2271
2272 if (DISPLAY_VER(dev_priv) >= 13)
2273 return TGL_DE_PORT_AUX_DDIA |
2274 TGL_DE_PORT_AUX_DDIB |
2275 TGL_DE_PORT_AUX_DDIC |
2276 XELPD_DE_PORT_AUX_DDID |
2277 XELPD_DE_PORT_AUX_DDIE |
2278 TGL_DE_PORT_AUX_USBC1 |
2279 TGL_DE_PORT_AUX_USBC2 |
2280 TGL_DE_PORT_AUX_USBC3 |
2281 TGL_DE_PORT_AUX_USBC4;
2282 else if (DISPLAY_VER(dev_priv) >= 12)
2283 return TGL_DE_PORT_AUX_DDIA |
2284 TGL_DE_PORT_AUX_DDIB |
2285 TGL_DE_PORT_AUX_DDIC |
2286 TGL_DE_PORT_AUX_USBC1 |
2287 TGL_DE_PORT_AUX_USBC2 |
2288 TGL_DE_PORT_AUX_USBC3 |
2289 TGL_DE_PORT_AUX_USBC4 |
2290 TGL_DE_PORT_AUX_USBC5 |
2291 TGL_DE_PORT_AUX_USBC6;
2292
2293
2294 mask = GEN8_AUX_CHANNEL_A;
2295 if (DISPLAY_VER(dev_priv) >= 9)
2296 mask |= GEN9_AUX_CHANNEL_B |
2297 GEN9_AUX_CHANNEL_C |
2298 GEN9_AUX_CHANNEL_D;
2299
2300 if (IS_CNL_WITH_PORT_F(dev_priv) || DISPLAY_VER(dev_priv) == 11)
2301 mask |= CNL_AUX_CHANNEL_F;
2302
2303 if (DISPLAY_VER(dev_priv) == 11)
2304 mask |= ICL_AUX_CHANNEL_E;
2305
2306 return mask;
2307}
2308
2309static u32 gen8_de_pipe_fault_mask(struct drm_i915_private *dev_priv)
2310{
2311 if (DISPLAY_VER(dev_priv) >= 13 || HAS_D12_PLANE_MINIMIZATION(dev_priv))
2312 return RKL_DE_PIPE_IRQ_FAULT_ERRORS;
2313 else if (DISPLAY_VER(dev_priv) >= 11)
2314 return GEN11_DE_PIPE_IRQ_FAULT_ERRORS;
2315 else if (DISPLAY_VER(dev_priv) >= 9)
2316 return GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
2317 else
2318 return GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2319}
2320
2321static void
2322gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir)
2323{
2324 bool found = false;
2325
2326 if (iir & GEN8_DE_MISC_GSE) {
2327 intel_opregion_asle_intr(dev_priv);
2328 found = true;
2329 }
2330
2331 if (iir & GEN8_DE_EDP_PSR) {
2332 struct intel_encoder *encoder;
2333 u32 psr_iir;
2334 i915_reg_t iir_reg;
2335
2336 for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) {
2337 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
2338
2339 if (DISPLAY_VER(dev_priv) >= 12)
2340 iir_reg = TRANS_PSR_IIR(intel_dp->psr.transcoder);
2341 else
2342 iir_reg = EDP_PSR_IIR;
2343
2344 psr_iir = intel_uncore_read(&dev_priv->uncore, iir_reg);
2345 intel_uncore_write(&dev_priv->uncore, iir_reg, psr_iir);
2346
2347 if (psr_iir)
2348 found = true;
2349
2350 intel_psr_irq_handler(intel_dp, psr_iir);
2351
2352 /* prior GEN12 only have one EDP PSR */
2353 if (DISPLAY_VER(dev_priv) < 12)
2354 break;
2355 }
2356 }
2357
2358 if (!found)
2359 drm_err(&dev_priv->drm, "Unexpected DE Misc interrupt\n");
2360}
2361
2362static void gen11_dsi_te_interrupt_handler(struct drm_i915_private *dev_priv,
2363 u32 te_trigger)
2364{
2365 enum pipe pipe = INVALID_PIPE;
2366 enum transcoder dsi_trans;
2367 enum port port;
2368 u32 val, tmp;
2369
2370 /*
2371 * Incase of dual link, TE comes from DSI_1
2372 * this is to check if dual link is enabled
2373 */
2374 val = intel_uncore_read(&dev_priv->uncore, TRANS_DDI_FUNC_CTL2(TRANSCODER_DSI_0));
2375 val &= PORT_SYNC_MODE_ENABLE;
2376
2377 /*
2378 * if dual link is enabled, then read DSI_0
2379 * transcoder registers
2380 */
2381 port = ((te_trigger & DSI1_TE && val) || (te_trigger & DSI0_TE)) ?
2382 PORT_A : PORT_B;
2383 dsi_trans = (port == PORT_A) ? TRANSCODER_DSI_0 : TRANSCODER_DSI_1;
2384
2385 /* Check if DSI configured in command mode */
2386 val = intel_uncore_read(&dev_priv->uncore, DSI_TRANS_FUNC_CONF(dsi_trans));
2387 val = val & OP_MODE_MASK;
2388
2389 if (val != CMD_MODE_NO_GATE && val != CMD_MODE_TE_GATE) {
2390 drm_err(&dev_priv->drm, "DSI trancoder not configured in command mode\n");
2391 return;
2392 }
2393
2394 /* Get PIPE for handling VBLANK event */
2395 val = intel_uncore_read(&dev_priv->uncore, TRANS_DDI_FUNC_CTL(dsi_trans));
2396 switch (val & TRANS_DDI_EDP_INPUT_MASK) {
2397 case TRANS_DDI_EDP_INPUT_A_ON:
2398 pipe = PIPE_A;
2399 break;
2400 case TRANS_DDI_EDP_INPUT_B_ONOFF:
2401 pipe = PIPE_B;
2402 break;
2403 case TRANS_DDI_EDP_INPUT_C_ONOFF:
2404 pipe = PIPE_C;
2405 break;
2406 default:
2407 drm_err(&dev_priv->drm, "Invalid PIPE\n");
2408 return;
2409 }
2410
2411 intel_handle_vblank(dev_priv, pipe);
2412
2413 /* clear TE in dsi IIR */
2414 port = (te_trigger & DSI1_TE) ? PORT_B : PORT_A;
2415 tmp = intel_uncore_read(&dev_priv->uncore, DSI_INTR_IDENT_REG(port));
2416 intel_uncore_write(&dev_priv->uncore, DSI_INTR_IDENT_REG(port), tmp);
2417}
2418
2419static u32 gen8_de_pipe_flip_done_mask(struct drm_i915_private *i915)
2420{
2421 if (DISPLAY_VER(i915) >= 9)
2422 return GEN9_PIPE_PLANE1_FLIP_DONE;
2423 else
2424 return GEN8_PIPE_PRIMARY_FLIP_DONE;
2425}
2426
2427u32 gen8_de_pipe_underrun_mask(struct drm_i915_private *dev_priv)
2428{
2429 u32 mask = GEN8_PIPE_FIFO_UNDERRUN;
2430
2431 if (DISPLAY_VER(dev_priv) >= 13)
2432 mask |= XELPD_PIPE_SOFT_UNDERRUN |
2433 XELPD_PIPE_HARD_UNDERRUN;
2434
2435 return mask;
2436}
2437
2438static irqreturn_t
2439gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
2440{
2441 irqreturn_t ret = IRQ_NONE;
2442 u32 iir;
2443 enum pipe pipe;
2444
2445 drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_DISPLAY(dev_priv));
2446
2447 if (master_ctl & GEN8_DE_MISC_IRQ) {
2448 iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_MISC_IIR);
2449 if (iir) {
2450 intel_uncore_write(&dev_priv->uncore, GEN8_DE_MISC_IIR, iir);
2451 ret = IRQ_HANDLED;
2452 gen8_de_misc_irq_handler(dev_priv, iir);
2453 } else {
2454 drm_err(&dev_priv->drm,
2455 "The master control interrupt lied (DE MISC)!\n");
2456 }
2457 }
2458
2459 if (DISPLAY_VER(dev_priv) >= 11 && (master_ctl & GEN11_DE_HPD_IRQ)) {
2460 iir = intel_uncore_read(&dev_priv->uncore, GEN11_DE_HPD_IIR);
2461 if (iir) {
2462 intel_uncore_write(&dev_priv->uncore, GEN11_DE_HPD_IIR, iir);
2463 ret = IRQ_HANDLED;
2464 gen11_hpd_irq_handler(dev_priv, iir);
2465 } else {
2466 drm_err(&dev_priv->drm,
2467 "The master control interrupt lied, (DE HPD)!\n");
2468 }
2469 }
2470
2471 if (master_ctl & GEN8_DE_PORT_IRQ) {
2472 iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PORT_IIR);
2473 if (iir) {
2474 bool found = false;
2475
2476 intel_uncore_write(&dev_priv->uncore, GEN8_DE_PORT_IIR, iir);
2477 ret = IRQ_HANDLED;
2478
2479 if (iir & gen8_de_port_aux_mask(dev_priv)) {
2480 dp_aux_irq_handler(dev_priv);
2481 found = true;
2482 }
2483
2484 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
2485 u32 hotplug_trigger = iir & BXT_DE_PORT_HOTPLUG_MASK;
2486
2487 if (hotplug_trigger) {
2488 bxt_hpd_irq_handler(dev_priv, hotplug_trigger);
2489 found = true;
2490 }
2491 } else if (IS_BROADWELL(dev_priv)) {
2492 u32 hotplug_trigger = iir & BDW_DE_PORT_HOTPLUG_MASK;
2493
2494 if (hotplug_trigger) {
2495 ilk_hpd_irq_handler(dev_priv, hotplug_trigger);
2496 found = true;
2497 }
2498 }
2499
2500 if ((IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) &&
2501 (iir & BXT_DE_PORT_GMBUS)) {
2502 gmbus_irq_handler(dev_priv);
2503 found = true;
2504 }
2505
2506 if (DISPLAY_VER(dev_priv) >= 11) {
2507 u32 te_trigger = iir & (DSI0_TE | DSI1_TE);
2508
2509 if (te_trigger) {
2510 gen11_dsi_te_interrupt_handler(dev_priv, te_trigger);
2511 found = true;
2512 }
2513 }
2514
2515 if (!found)
2516 drm_err(&dev_priv->drm,
2517 "Unexpected DE Port interrupt\n");
2518 }
2519 else
2520 drm_err(&dev_priv->drm,
2521 "The master control interrupt lied (DE PORT)!\n");
2522 }
2523
2524 for_each_pipe(dev_priv, pipe) {
2525 u32 fault_errors;
2526
2527 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2528 continue;
2529
2530 iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PIPE_IIR(pipe));
2531 if (!iir) {
2532 drm_err(&dev_priv->drm,
2533 "The master control interrupt lied (DE PIPE)!\n");
2534 continue;
2535 }
2536
2537 ret = IRQ_HANDLED;
2538 intel_uncore_write(&dev_priv->uncore, GEN8_DE_PIPE_IIR(pipe), iir);
2539
2540 if (iir & GEN8_PIPE_VBLANK)
2541 intel_handle_vblank(dev_priv, pipe);
2542
2543 if (iir & gen8_de_pipe_flip_done_mask(dev_priv))
2544 flip_done_handler(dev_priv, pipe);
2545
2546 if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
2547 hsw_pipe_crc_irq_handler(dev_priv, pipe);
2548
2549 if (iir & gen8_de_pipe_underrun_mask(dev_priv))
2550 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2551
2552 fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv);
2553 if (fault_errors)
2554 drm_err(&dev_priv->drm,
2555 "Fault errors on pipe %c: 0x%08x\n",
2556 pipe_name(pipe),
2557 fault_errors);
2558 }
2559
2560 if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) &&
2561 master_ctl & GEN8_DE_PCH_IRQ) {
2562 /*
2563 * FIXME(BDW): Assume for now that the new interrupt handling
2564 * scheme also closed the SDE interrupt handling race we've seen
2565 * on older pch-split platforms. But this needs testing.
2566 */
2567 iir = intel_uncore_read(&dev_priv->uncore, SDEIIR);
2568 if (iir) {
2569 intel_uncore_write(&dev_priv->uncore, SDEIIR, iir);
2570 ret = IRQ_HANDLED;
2571
2572 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
2573 icp_irq_handler(dev_priv, iir);
2574 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT)
2575 spt_irq_handler(dev_priv, iir);
2576 else
2577 cpt_irq_handler(dev_priv, iir);
2578 } else {
2579 /*
2580 * Like on previous PCH there seems to be something
2581 * fishy going on with forwarding PCH interrupts.
2582 */
2583 drm_dbg(&dev_priv->drm,
2584 "The master control interrupt lied (SDE)!\n");
2585 }
2586 }
2587
2588 return ret;
2589}
2590
2591static inline u32 gen8_master_intr_disable(void __iomem * const regs)
2592{
2593 raw_reg_write(regs, GEN8_MASTER_IRQ, 0);
2594
2595 /*
2596 * Now with master disabled, get a sample of level indications
2597 * for this interrupt. Indications will be cleared on related acks.
2598 * New indications can and will light up during processing,
2599 * and will generate new interrupt after enabling master.
2600 */
2601 return raw_reg_read(regs, GEN8_MASTER_IRQ);
2602}
2603
2604static inline void gen8_master_intr_enable(void __iomem * const regs)
2605{
2606 raw_reg_write(regs, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2607}
2608
2609static irqreturn_t gen8_irq_handler(int irq, void *arg)
2610{
2611 struct drm_i915_private *dev_priv = arg;
2612 void __iomem * const regs = dev_priv->uncore.regs;
2613 u32 master_ctl;
2614
2615 if (!intel_irqs_enabled(dev_priv))
2616 return IRQ_NONE;
2617
2618 master_ctl = gen8_master_intr_disable(regs);
2619 if (!master_ctl) {
2620 gen8_master_intr_enable(regs);
2621 return IRQ_NONE;
2622 }
2623
2624 /* Find, queue (onto bottom-halves), then clear each source */
2625 gen8_gt_irq_handler(&dev_priv->gt, master_ctl);
2626
2627 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2628 if (master_ctl & ~GEN8_GT_IRQS) {
2629 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
2630 gen8_de_irq_handler(dev_priv, master_ctl);
2631 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
2632 }
2633
2634 gen8_master_intr_enable(regs);
2635
2636 pmu_irq_stats(dev_priv, IRQ_HANDLED);
2637
2638 return IRQ_HANDLED;
2639}
2640
2641static u32
2642gen11_gu_misc_irq_ack(struct intel_gt *gt, const u32 master_ctl)
2643{
2644 void __iomem * const regs = gt->uncore->regs;
2645 u32 iir;
2646
2647 if (!(master_ctl & GEN11_GU_MISC_IRQ))
2648 return 0;
2649
2650 iir = raw_reg_read(regs, GEN11_GU_MISC_IIR);
2651 if (likely(iir))
2652 raw_reg_write(regs, GEN11_GU_MISC_IIR, iir);
2653
2654 return iir;
2655}
2656
2657static void
2658gen11_gu_misc_irq_handler(struct intel_gt *gt, const u32 iir)
2659{
2660 if (iir & GEN11_GU_MISC_GSE)
2661 intel_opregion_asle_intr(gt->i915);
2662}
2663
2664static inline u32 gen11_master_intr_disable(void __iomem * const regs)
2665{
2666 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, 0);
2667
2668 /*
2669 * Now with master disabled, get a sample of level indications
2670 * for this interrupt. Indications will be cleared on related acks.
2671 * New indications can and will light up during processing,
2672 * and will generate new interrupt after enabling master.
2673 */
2674 return raw_reg_read(regs, GEN11_GFX_MSTR_IRQ);
2675}
2676
2677static inline void gen11_master_intr_enable(void __iomem * const regs)
2678{
2679 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ);
2680}
2681
2682static void
2683gen11_display_irq_handler(struct drm_i915_private *i915)
2684{
2685 void __iomem * const regs = i915->uncore.regs;
2686 const u32 disp_ctl = raw_reg_read(regs, GEN11_DISPLAY_INT_CTL);
2687
2688 disable_rpm_wakeref_asserts(&i915->runtime_pm);
2689 /*
2690 * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ
2691 * for the display related bits.
2692 */
2693 raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 0x0);
2694 gen8_de_irq_handler(i915, disp_ctl);
2695 raw_reg_write(regs, GEN11_DISPLAY_INT_CTL,
2696 GEN11_DISPLAY_IRQ_ENABLE);
2697
2698 enable_rpm_wakeref_asserts(&i915->runtime_pm);
2699}
2700
2701static __always_inline irqreturn_t
2702__gen11_irq_handler(struct drm_i915_private * const i915,
2703 u32 (*intr_disable)(void __iomem * const regs),
2704 void (*intr_enable)(void __iomem * const regs))
2705{
2706 void __iomem * const regs = i915->uncore.regs;
2707 struct intel_gt *gt = &i915->gt;
2708 u32 master_ctl;
2709 u32 gu_misc_iir;
2710
2711 if (!intel_irqs_enabled(i915))
2712 return IRQ_NONE;
2713
2714 master_ctl = intr_disable(regs);
2715 if (!master_ctl) {
2716 intr_enable(regs);
2717 return IRQ_NONE;
2718 }
2719
2720 /* Find, queue (onto bottom-halves), then clear each source */
2721 gen11_gt_irq_handler(gt, master_ctl);
2722
2723 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2724 if (master_ctl & GEN11_DISPLAY_IRQ)
2725 gen11_display_irq_handler(i915);
2726
2727 gu_misc_iir = gen11_gu_misc_irq_ack(gt, master_ctl);
2728
2729 intr_enable(regs);
2730
2731 gen11_gu_misc_irq_handler(gt, gu_misc_iir);
2732
2733 pmu_irq_stats(i915, IRQ_HANDLED);
2734
2735 return IRQ_HANDLED;
2736}
2737
2738static irqreturn_t gen11_irq_handler(int irq, void *arg)
2739{
2740 return __gen11_irq_handler(arg,
2741 gen11_master_intr_disable,
2742 gen11_master_intr_enable);
2743}
2744
2745static u32 dg1_master_intr_disable_and_ack(void __iomem * const regs)
2746{
2747 u32 val;
2748
2749 /* First disable interrupts */
2750 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, 0);
2751
2752 /* Get the indication levels and ack the master unit */
2753 val = raw_reg_read(regs, DG1_MSTR_UNIT_INTR);
2754 if (unlikely(!val))
2755 return 0;
2756
2757 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, val);
2758
2759 /*
2760 * Now with master disabled, get a sample of level indications
2761 * for this interrupt and ack them right away - we keep GEN11_MASTER_IRQ
2762 * out as this bit doesn't exist anymore for DG1
2763 */
2764 val = raw_reg_read(regs, GEN11_GFX_MSTR_IRQ) & ~GEN11_MASTER_IRQ;
2765 if (unlikely(!val))
2766 return 0;
2767
2768 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, val);
2769
2770 return val;
2771}
2772
2773static inline void dg1_master_intr_enable(void __iomem * const regs)
2774{
2775 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, DG1_MSTR_IRQ);
2776}
2777
2778static irqreturn_t dg1_irq_handler(int irq, void *arg)
2779{
2780 return __gen11_irq_handler(arg,
2781 dg1_master_intr_disable_and_ack,
2782 dg1_master_intr_enable);
2783}
2784
2785/* Called from drm generic code, passed 'crtc' which
2786 * we use as a pipe index
2787 */
2788int i8xx_enable_vblank(struct drm_crtc *crtc)
2789{
2790 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2791 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2792 unsigned long irqflags;
2793
2794 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2795 i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
2796 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2797
2798 return 0;
2799}
2800
2801int i915gm_enable_vblank(struct drm_crtc *crtc)
2802{
2803 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2804
2805 /*
2806 * Vblank interrupts fail to wake the device up from C2+.
2807 * Disabling render clock gating during C-states avoids
2808 * the problem. There is a small power cost so we do this
2809 * only when vblank interrupts are actually enabled.
2810 */
2811 if (dev_priv->vblank_enabled++ == 0)
2812 intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_ENABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE));
2813
2814 return i8xx_enable_vblank(crtc);
2815}
2816
2817int i965_enable_vblank(struct drm_crtc *crtc)
2818{
2819 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2820 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2821 unsigned long irqflags;
2822
2823 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2824 i915_enable_pipestat(dev_priv, pipe,
2825 PIPE_START_VBLANK_INTERRUPT_STATUS);
2826 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2827
2828 return 0;
2829}
2830
2831int ilk_enable_vblank(struct drm_crtc *crtc)
2832{
2833 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2834 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2835 unsigned long irqflags;
2836 u32 bit = DISPLAY_VER(dev_priv) >= 7 ?
2837 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
2838
2839 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2840 ilk_enable_display_irq(dev_priv, bit);
2841 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2842
2843 /* Even though there is no DMC, frame counter can get stuck when
2844 * PSR is active as no frames are generated.
2845 */
2846 if (HAS_PSR(dev_priv))
2847 drm_crtc_vblank_restore(crtc);
2848
2849 return 0;
2850}
2851
2852static bool gen11_dsi_configure_te(struct intel_crtc *intel_crtc,
2853 bool enable)
2854{
2855 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
2856 enum port port;
2857 u32 tmp;
2858
2859 if (!(intel_crtc->mode_flags &
2860 (I915_MODE_FLAG_DSI_USE_TE1 | I915_MODE_FLAG_DSI_USE_TE0)))
2861 return false;
2862
2863 /* for dual link cases we consider TE from slave */
2864 if (intel_crtc->mode_flags & I915_MODE_FLAG_DSI_USE_TE1)
2865 port = PORT_B;
2866 else
2867 port = PORT_A;
2868
2869 tmp = intel_uncore_read(&dev_priv->uncore, DSI_INTR_MASK_REG(port));
2870 if (enable)
2871 tmp &= ~DSI_TE_EVENT;
2872 else
2873 tmp |= DSI_TE_EVENT;
2874
2875 intel_uncore_write(&dev_priv->uncore, DSI_INTR_MASK_REG(port), tmp);
2876
2877 tmp = intel_uncore_read(&dev_priv->uncore, DSI_INTR_IDENT_REG(port));
2878 intel_uncore_write(&dev_priv->uncore, DSI_INTR_IDENT_REG(port), tmp);
2879
2880 return true;
2881}
2882
2883int bdw_enable_vblank(struct drm_crtc *crtc)
2884{
2885 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2886 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2887 enum pipe pipe = intel_crtc->pipe;
2888 unsigned long irqflags;
2889
2890 if (gen11_dsi_configure_te(intel_crtc, true))
2891 return 0;
2892
2893 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2894 bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
2895 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2896
2897 /* Even if there is no DMC, frame counter can get stuck when
2898 * PSR is active as no frames are generated, so check only for PSR.
2899 */
2900 if (HAS_PSR(dev_priv))
2901 drm_crtc_vblank_restore(crtc);
2902
2903 return 0;
2904}
2905
2906/* Called from drm generic code, passed 'crtc' which
2907 * we use as a pipe index
2908 */
2909void i8xx_disable_vblank(struct drm_crtc *crtc)
2910{
2911 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2912 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2913 unsigned long irqflags;
2914
2915 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2916 i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
2917 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2918}
2919
2920void i915gm_disable_vblank(struct drm_crtc *crtc)
2921{
2922 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2923
2924 i8xx_disable_vblank(crtc);
2925
2926 if (--dev_priv->vblank_enabled == 0)
2927 intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_DISABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE));
2928}
2929
2930void i965_disable_vblank(struct drm_crtc *crtc)
2931{
2932 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2933 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2934 unsigned long irqflags;
2935
2936 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2937 i915_disable_pipestat(dev_priv, pipe,
2938 PIPE_START_VBLANK_INTERRUPT_STATUS);
2939 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2940}
2941
2942void ilk_disable_vblank(struct drm_crtc *crtc)
2943{
2944 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2945 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2946 unsigned long irqflags;
2947 u32 bit = DISPLAY_VER(dev_priv) >= 7 ?
2948 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
2949
2950 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2951 ilk_disable_display_irq(dev_priv, bit);
2952 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2953}
2954
2955void bdw_disable_vblank(struct drm_crtc *crtc)
2956{
2957 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2958 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2959 enum pipe pipe = intel_crtc->pipe;
2960 unsigned long irqflags;
2961
2962 if (gen11_dsi_configure_te(intel_crtc, false))
2963 return;
2964
2965 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2966 bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
2967 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2968}
2969
2970static void ibx_irq_reset(struct drm_i915_private *dev_priv)
2971{
2972 struct intel_uncore *uncore = &dev_priv->uncore;
2973
2974 if (HAS_PCH_NOP(dev_priv))
2975 return;
2976
2977 GEN3_IRQ_RESET(uncore, SDE);
2978
2979 if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
2980 intel_uncore_write(&dev_priv->uncore, SERR_INT, 0xffffffff);
2981}
2982
2983static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
2984{
2985 struct intel_uncore *uncore = &dev_priv->uncore;
2986
2987 if (IS_CHERRYVIEW(dev_priv))
2988 intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
2989 else
2990 intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK);
2991
2992 i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
2993 intel_uncore_write(uncore, PORT_HOTPLUG_STAT, intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT));
2994
2995 i9xx_pipestat_irq_reset(dev_priv);
2996
2997 GEN3_IRQ_RESET(uncore, VLV_);
2998 dev_priv->irq_mask = ~0u;
2999}
3000
3001static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
3002{
3003 struct intel_uncore *uncore = &dev_priv->uncore;
3004
3005 u32 pipestat_mask;
3006 u32 enable_mask;
3007 enum pipe pipe;
3008
3009 pipestat_mask = PIPE_CRC_DONE_INTERRUPT_STATUS;
3010
3011 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3012 for_each_pipe(dev_priv, pipe)
3013 i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
3014
3015 enable_mask = I915_DISPLAY_PORT_INTERRUPT |
3016 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3017 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3018 I915_LPE_PIPE_A_INTERRUPT |
3019 I915_LPE_PIPE_B_INTERRUPT;
3020
3021 if (IS_CHERRYVIEW(dev_priv))
3022 enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT |
3023 I915_LPE_PIPE_C_INTERRUPT;
3024
3025 drm_WARN_ON(&dev_priv->drm, dev_priv->irq_mask != ~0u);
3026
3027 dev_priv->irq_mask = ~enable_mask;
3028
3029 GEN3_IRQ_INIT(uncore, VLV_, dev_priv->irq_mask, enable_mask);
3030}
3031
3032/* drm_dma.h hooks
3033*/
3034static void ilk_irq_reset(struct drm_i915_private *dev_priv)
3035{
3036 struct intel_uncore *uncore = &dev_priv->uncore;
3037
3038 GEN3_IRQ_RESET(uncore, DE);
3039 dev_priv->irq_mask = ~0u;
3040
3041 if (GRAPHICS_VER(dev_priv) == 7)
3042 intel_uncore_write(uncore, GEN7_ERR_INT, 0xffffffff);
3043
3044 if (IS_HASWELL(dev_priv)) {
3045 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
3046 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
3047 }
3048
3049 gen5_gt_irq_reset(&dev_priv->gt);
3050
3051 ibx_irq_reset(dev_priv);
3052}
3053
3054static void valleyview_irq_reset(struct drm_i915_private *dev_priv)
3055{
3056 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, 0);
3057 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER);
3058
3059 gen5_gt_irq_reset(&dev_priv->gt);
3060
3061 spin_lock_irq(&dev_priv->irq_lock);
3062 if (dev_priv->display_irqs_enabled)
3063 vlv_display_irq_reset(dev_priv);
3064 spin_unlock_irq(&dev_priv->irq_lock);
3065}
3066
3067static void gen8_display_irq_reset(struct drm_i915_private *dev_priv)
3068{
3069 struct intel_uncore *uncore = &dev_priv->uncore;
3070 enum pipe pipe;
3071
3072 if (!HAS_DISPLAY(dev_priv))
3073 return;
3074
3075 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
3076 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
3077
3078 for_each_pipe(dev_priv, pipe)
3079 if (intel_display_power_is_enabled(dev_priv,
3080 POWER_DOMAIN_PIPE(pipe)))
3081 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
3082
3083 GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
3084 GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
3085}
3086
3087static void gen8_irq_reset(struct drm_i915_private *dev_priv)
3088{
3089 struct intel_uncore *uncore = &dev_priv->uncore;
3090
3091 gen8_master_intr_disable(dev_priv->uncore.regs);
3092
3093 gen8_gt_irq_reset(&dev_priv->gt);
3094 gen8_display_irq_reset(dev_priv);
3095 GEN3_IRQ_RESET(uncore, GEN8_PCU_);
3096
3097 if (HAS_PCH_SPLIT(dev_priv))
3098 ibx_irq_reset(dev_priv);
3099
3100}
3101
3102static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
3103{
3104 struct intel_uncore *uncore = &dev_priv->uncore;
3105 enum pipe pipe;
3106 u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
3107 BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
3108
3109 if (!HAS_DISPLAY(dev_priv))
3110 return;
3111
3112 intel_uncore_write(uncore, GEN11_DISPLAY_INT_CTL, 0);
3113
3114 if (DISPLAY_VER(dev_priv) >= 12) {
3115 enum transcoder trans;
3116
3117 for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
3118 enum intel_display_power_domain domain;
3119
3120 domain = POWER_DOMAIN_TRANSCODER(trans);
3121 if (!intel_display_power_is_enabled(dev_priv, domain))
3122 continue;
3123
3124 intel_uncore_write(uncore, TRANS_PSR_IMR(trans), 0xffffffff);
3125 intel_uncore_write(uncore, TRANS_PSR_IIR(trans), 0xffffffff);
3126 }
3127 } else {
3128 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
3129 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
3130 }
3131
3132 for_each_pipe(dev_priv, pipe)
3133 if (intel_display_power_is_enabled(dev_priv,
3134 POWER_DOMAIN_PIPE(pipe)))
3135 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
3136
3137 GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
3138 GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
3139 GEN3_IRQ_RESET(uncore, GEN11_DE_HPD_);
3140
3141 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
3142 GEN3_IRQ_RESET(uncore, SDE);
3143}
3144
3145static void gen11_irq_reset(struct drm_i915_private *dev_priv)
3146{
3147 struct intel_uncore *uncore = &dev_priv->uncore;
3148
3149 if (HAS_MASTER_UNIT_IRQ(dev_priv))
3150 dg1_master_intr_disable_and_ack(dev_priv->uncore.regs);
3151 else
3152 gen11_master_intr_disable(dev_priv->uncore.regs);
3153
3154 gen11_gt_irq_reset(&dev_priv->gt);
3155 gen11_display_irq_reset(dev_priv);
3156
3157 GEN3_IRQ_RESET(uncore, GEN11_GU_MISC_);
3158 GEN3_IRQ_RESET(uncore, GEN8_PCU_);
3159}
3160
3161void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
3162 u8 pipe_mask)
3163{
3164 struct intel_uncore *uncore = &dev_priv->uncore;
3165 u32 extra_ier = GEN8_PIPE_VBLANK |
3166 gen8_de_pipe_underrun_mask(dev_priv) |
3167 gen8_de_pipe_flip_done_mask(dev_priv);
3168 enum pipe pipe;
3169
3170 spin_lock_irq(&dev_priv->irq_lock);
3171
3172 if (!intel_irqs_enabled(dev_priv)) {
3173 spin_unlock_irq(&dev_priv->irq_lock);
3174 return;
3175 }
3176
3177 for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3178 GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
3179 dev_priv->de_irq_mask[pipe],
3180 ~dev_priv->de_irq_mask[pipe] | extra_ier);
3181
3182 spin_unlock_irq(&dev_priv->irq_lock);
3183}
3184
3185void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
3186 u8 pipe_mask)
3187{
3188 struct intel_uncore *uncore = &dev_priv->uncore;
3189 enum pipe pipe;
3190
3191 spin_lock_irq(&dev_priv->irq_lock);
3192
3193 if (!intel_irqs_enabled(dev_priv)) {
3194 spin_unlock_irq(&dev_priv->irq_lock);
3195 return;
3196 }
3197
3198 for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3199 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
3200
3201 spin_unlock_irq(&dev_priv->irq_lock);
3202
3203 /* make sure we're done processing display irqs */
3204 intel_synchronize_irq(dev_priv);
3205}
3206
3207static void cherryview_irq_reset(struct drm_i915_private *dev_priv)
3208{
3209 struct intel_uncore *uncore = &dev_priv->uncore;
3210
3211 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, 0);
3212 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ);
3213
3214 gen8_gt_irq_reset(&dev_priv->gt);
3215
3216 GEN3_IRQ_RESET(uncore, GEN8_PCU_);
3217
3218 spin_lock_irq(&dev_priv->irq_lock);
3219 if (dev_priv->display_irqs_enabled)
3220 vlv_display_irq_reset(dev_priv);
3221 spin_unlock_irq(&dev_priv->irq_lock);
3222}
3223
3224static u32 ibx_hotplug_enables(struct drm_i915_private *i915,
3225 enum hpd_pin pin)
3226{
3227 switch (pin) {
3228 case HPD_PORT_A:
3229 /*
3230 * When CPU and PCH are on the same package, port A
3231 * HPD must be enabled in both north and south.
3232 */
3233 return HAS_PCH_LPT_LP(i915) ?
3234 PORTA_HOTPLUG_ENABLE : 0;
3235 case HPD_PORT_B:
3236 return PORTB_HOTPLUG_ENABLE |
3237 PORTB_PULSE_DURATION_2ms;
3238 case HPD_PORT_C:
3239 return PORTC_HOTPLUG_ENABLE |
3240 PORTC_PULSE_DURATION_2ms;
3241 case HPD_PORT_D:
3242 return PORTD_HOTPLUG_ENABLE |
3243 PORTD_PULSE_DURATION_2ms;
3244 default:
3245 return 0;
3246 }
3247}
3248
3249static void ibx_hpd_detection_setup(struct drm_i915_private *dev_priv)
3250{
3251 u32 hotplug;
3252
3253 /*
3254 * Enable digital hotplug on the PCH, and configure the DP short pulse
3255 * duration to 2ms (which is the minimum in the Display Port spec).
3256 * The pulse duration bits are reserved on LPT+.
3257 */
3258 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG);
3259 hotplug &= ~(PORTA_HOTPLUG_ENABLE |
3260 PORTB_HOTPLUG_ENABLE |
3261 PORTC_HOTPLUG_ENABLE |
3262 PORTD_HOTPLUG_ENABLE |
3263 PORTB_PULSE_DURATION_MASK |
3264 PORTC_PULSE_DURATION_MASK |
3265 PORTD_PULSE_DURATION_MASK);
3266 hotplug |= intel_hpd_hotplug_enables(dev_priv, ibx_hotplug_enables);
3267 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, hotplug);
3268}
3269
3270static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv)
3271{
3272 u32 hotplug_irqs, enabled_irqs;
3273
3274 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3275 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3276
3277 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3278
3279 ibx_hpd_detection_setup(dev_priv);
3280}
3281
3282static u32 icp_ddi_hotplug_enables(struct drm_i915_private *i915,
3283 enum hpd_pin pin)
3284{
3285 switch (pin) {
3286 case HPD_PORT_A:
3287 case HPD_PORT_B:
3288 case HPD_PORT_C:
3289 case HPD_PORT_D:
3290 return SHOTPLUG_CTL_DDI_HPD_ENABLE(pin);
3291 default:
3292 return 0;
3293 }
3294}
3295
3296static u32 icp_tc_hotplug_enables(struct drm_i915_private *i915,
3297 enum hpd_pin pin)
3298{
3299 switch (pin) {
3300 case HPD_PORT_TC1:
3301 case HPD_PORT_TC2:
3302 case HPD_PORT_TC3:
3303 case HPD_PORT_TC4:
3304 case HPD_PORT_TC5:
3305 case HPD_PORT_TC6:
3306 return ICP_TC_HPD_ENABLE(pin);
3307 default:
3308 return 0;
3309 }
3310}
3311
3312static void icp_ddi_hpd_detection_setup(struct drm_i915_private *dev_priv)
3313{
3314 u32 hotplug;
3315
3316 hotplug = intel_uncore_read(&dev_priv->uncore, SHOTPLUG_CTL_DDI);
3317 hotplug &= ~(SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_A) |
3318 SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_B) |
3319 SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_C) |
3320 SHOTPLUG_CTL_DDI_HPD_ENABLE(HPD_PORT_D));
3321 hotplug |= intel_hpd_hotplug_enables(dev_priv, icp_ddi_hotplug_enables);
3322 intel_uncore_write(&dev_priv->uncore, SHOTPLUG_CTL_DDI, hotplug);
3323}
3324
3325static void icp_tc_hpd_detection_setup(struct drm_i915_private *dev_priv)
3326{
3327 u32 hotplug;
3328
3329 hotplug = intel_uncore_read(&dev_priv->uncore, SHOTPLUG_CTL_TC);
3330 hotplug &= ~(ICP_TC_HPD_ENABLE(HPD_PORT_TC1) |
3331 ICP_TC_HPD_ENABLE(HPD_PORT_TC2) |
3332 ICP_TC_HPD_ENABLE(HPD_PORT_TC3) |
3333 ICP_TC_HPD_ENABLE(HPD_PORT_TC4) |
3334 ICP_TC_HPD_ENABLE(HPD_PORT_TC5) |
3335 ICP_TC_HPD_ENABLE(HPD_PORT_TC6));
3336 hotplug |= intel_hpd_hotplug_enables(dev_priv, icp_tc_hotplug_enables);
3337 intel_uncore_write(&dev_priv->uncore, SHOTPLUG_CTL_TC, hotplug);
3338}
3339
3340static void icp_hpd_irq_setup(struct drm_i915_private *dev_priv)
3341{
3342 u32 hotplug_irqs, enabled_irqs;
3343
3344 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3345 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3346
3347 if (INTEL_PCH_TYPE(dev_priv) <= PCH_TGP)
3348 intel_uncore_write(&dev_priv->uncore, SHPD_FILTER_CNT, SHPD_FILTER_CNT_500_ADJ);
3349
3350 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3351
3352 icp_ddi_hpd_detection_setup(dev_priv);
3353 icp_tc_hpd_detection_setup(dev_priv);
3354}
3355
3356static u32 gen11_hotplug_enables(struct drm_i915_private *i915,
3357 enum hpd_pin pin)
3358{
3359 switch (pin) {
3360 case HPD_PORT_TC1:
3361 case HPD_PORT_TC2:
3362 case HPD_PORT_TC3:
3363 case HPD_PORT_TC4:
3364 case HPD_PORT_TC5:
3365 case HPD_PORT_TC6:
3366 return GEN11_HOTPLUG_CTL_ENABLE(pin);
3367 default:
3368 return 0;
3369 }
3370}
3371
3372static void dg1_hpd_irq_setup(struct drm_i915_private *dev_priv)
3373{
3374 u32 val;
3375
3376 val = intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN1);
3377 val |= (INVERT_DDIA_HPD |
3378 INVERT_DDIB_HPD |
3379 INVERT_DDIC_HPD |
3380 INVERT_DDID_HPD);
3381 intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN1, val);
3382
3383 icp_hpd_irq_setup(dev_priv);
3384}
3385
3386static void gen11_tc_hpd_detection_setup(struct drm_i915_private *dev_priv)
3387{
3388 u32 hotplug;
3389
3390 hotplug = intel_uncore_read(&dev_priv->uncore, GEN11_TC_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_TC_HOTPLUG_CTL, hotplug);
3399}
3400
3401static void gen11_tbt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3402{
3403 u32 hotplug;
3404
3405 hotplug = intel_uncore_read(&dev_priv->uncore, GEN11_TBT_HOTPLUG_CTL);
3406 hotplug &= ~(GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC1) |
3407 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC2) |
3408 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC3) |
3409 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC4) |
3410 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC5) |
3411 GEN11_HOTPLUG_CTL_ENABLE(HPD_PORT_TC6));
3412 hotplug |= intel_hpd_hotplug_enables(dev_priv, gen11_hotplug_enables);
3413 intel_uncore_write(&dev_priv->uncore, GEN11_TBT_HOTPLUG_CTL, hotplug);
3414}
3415
3416static void gen11_hpd_irq_setup(struct drm_i915_private *dev_priv)
3417{
3418 u32 hotplug_irqs, enabled_irqs;
3419 u32 val;
3420
3421 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3422 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.hpd);
3423
3424 val = intel_uncore_read(&dev_priv->uncore, GEN11_DE_HPD_IMR);
3425 val &= ~hotplug_irqs;
3426 val |= ~enabled_irqs & hotplug_irqs;
3427 intel_uncore_write(&dev_priv->uncore, GEN11_DE_HPD_IMR, val);
3428 intel_uncore_posting_read(&dev_priv->uncore, GEN11_DE_HPD_IMR);
3429
3430 gen11_tc_hpd_detection_setup(dev_priv);
3431 gen11_tbt_hpd_detection_setup(dev_priv);
3432
3433 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
3434 icp_hpd_irq_setup(dev_priv);
3435}
3436
3437static u32 spt_hotplug_enables(struct drm_i915_private *i915,
3438 enum hpd_pin pin)
3439{
3440 switch (pin) {
3441 case HPD_PORT_A:
3442 return PORTA_HOTPLUG_ENABLE;
3443 case HPD_PORT_B:
3444 return PORTB_HOTPLUG_ENABLE;
3445 case HPD_PORT_C:
3446 return PORTC_HOTPLUG_ENABLE;
3447 case HPD_PORT_D:
3448 return PORTD_HOTPLUG_ENABLE;
3449 default:
3450 return 0;
3451 }
3452}
3453
3454static u32 spt_hotplug2_enables(struct drm_i915_private *i915,
3455 enum hpd_pin pin)
3456{
3457 switch (pin) {
3458 case HPD_PORT_E:
3459 return PORTE_HOTPLUG_ENABLE;
3460 default:
3461 return 0;
3462 }
3463}
3464
3465static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3466{
3467 u32 val, hotplug;
3468
3469 /* Display WA #1179 WaHardHangonHotPlug: cnp */
3470 if (HAS_PCH_CNP(dev_priv)) {
3471 val = intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN1);
3472 val &= ~CHASSIS_CLK_REQ_DURATION_MASK;
3473 val |= CHASSIS_CLK_REQ_DURATION(0xf);
3474 intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN1, val);
3475 }
3476
3477 /* Enable digital hotplug on the PCH */
3478 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG);
3479 hotplug &= ~(PORTA_HOTPLUG_ENABLE |
3480 PORTB_HOTPLUG_ENABLE |
3481 PORTC_HOTPLUG_ENABLE |
3482 PORTD_HOTPLUG_ENABLE);
3483 hotplug |= intel_hpd_hotplug_enables(dev_priv, spt_hotplug_enables);
3484 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, hotplug);
3485
3486 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG2);
3487 hotplug &= ~PORTE_HOTPLUG_ENABLE;
3488 hotplug |= intel_hpd_hotplug_enables(dev_priv, spt_hotplug2_enables);
3489 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG2, hotplug);
3490}
3491
3492static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3493{
3494 u32 hotplug_irqs, enabled_irqs;
3495
3496 if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
3497 intel_uncore_write(&dev_priv->uncore, SHPD_FILTER_CNT, SHPD_FILTER_CNT_500_ADJ);
3498
3499 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3500 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3501
3502 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3503
3504 spt_hpd_detection_setup(dev_priv);
3505}
3506
3507static u32 ilk_hotplug_enables(struct drm_i915_private *i915,
3508 enum hpd_pin pin)
3509{
3510 switch (pin) {
3511 case HPD_PORT_A:
3512 return DIGITAL_PORTA_HOTPLUG_ENABLE |
3513 DIGITAL_PORTA_PULSE_DURATION_2ms;
3514 default:
3515 return 0;
3516 }
3517}
3518
3519static void ilk_hpd_detection_setup(struct drm_i915_private *dev_priv)
3520{
3521 u32 hotplug;
3522
3523 /*
3524 * Enable digital hotplug on the CPU, and configure the DP short pulse
3525 * duration to 2ms (which is the minimum in the Display Port spec)
3526 * The pulse duration bits are reserved on HSW+.
3527 */
3528 hotplug = intel_uncore_read(&dev_priv->uncore, DIGITAL_PORT_HOTPLUG_CNTRL);
3529 hotplug &= ~(DIGITAL_PORTA_HOTPLUG_ENABLE |
3530 DIGITAL_PORTA_PULSE_DURATION_MASK);
3531 hotplug |= intel_hpd_hotplug_enables(dev_priv, ilk_hotplug_enables);
3532 intel_uncore_write(&dev_priv->uncore, DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);
3533}
3534
3535static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv)
3536{
3537 u32 hotplug_irqs, enabled_irqs;
3538
3539 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3540 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.hpd);
3541
3542 if (DISPLAY_VER(dev_priv) >= 8)
3543 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3544 else
3545 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3546
3547 ilk_hpd_detection_setup(dev_priv);
3548
3549 ibx_hpd_irq_setup(dev_priv);
3550}
3551
3552static u32 bxt_hotplug_enables(struct drm_i915_private *i915,
3553 enum hpd_pin pin)
3554{
3555 u32 hotplug;
3556
3557 switch (pin) {
3558 case HPD_PORT_A:
3559 hotplug = PORTA_HOTPLUG_ENABLE;
3560 if (intel_bios_is_port_hpd_inverted(i915, PORT_A))
3561 hotplug |= BXT_DDIA_HPD_INVERT;
3562 return hotplug;
3563 case HPD_PORT_B:
3564 hotplug = PORTB_HOTPLUG_ENABLE;
3565 if (intel_bios_is_port_hpd_inverted(i915, PORT_B))
3566 hotplug |= BXT_DDIB_HPD_INVERT;
3567 return hotplug;
3568 case HPD_PORT_C:
3569 hotplug = PORTC_HOTPLUG_ENABLE;
3570 if (intel_bios_is_port_hpd_inverted(i915, PORT_C))
3571 hotplug |= BXT_DDIC_HPD_INVERT;
3572 return hotplug;
3573 default:
3574 return 0;
3575 }
3576}
3577
3578static void bxt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3579{
3580 u32 hotplug;
3581
3582 hotplug = intel_uncore_read(&dev_priv->uncore, PCH_PORT_HOTPLUG);
3583 hotplug &= ~(PORTA_HOTPLUG_ENABLE |
3584 PORTB_HOTPLUG_ENABLE |
3585 PORTC_HOTPLUG_ENABLE |
3586 BXT_DDIA_HPD_INVERT |
3587 BXT_DDIB_HPD_INVERT |
3588 BXT_DDIC_HPD_INVERT);
3589 hotplug |= intel_hpd_hotplug_enables(dev_priv, bxt_hotplug_enables);
3590 intel_uncore_write(&dev_priv->uncore, PCH_PORT_HOTPLUG, hotplug);
3591}
3592
3593static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3594{
3595 u32 hotplug_irqs, enabled_irqs;
3596
3597 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3598 hotplug_irqs = intel_hpd_hotplug_irqs(dev_priv, dev_priv->hotplug.hpd);
3599
3600 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3601
3602 bxt_hpd_detection_setup(dev_priv);
3603}
3604
3605/*
3606 * SDEIER is also touched by the interrupt handler to work around missed PCH
3607 * interrupts. Hence we can't update it after the interrupt handler is enabled -
3608 * instead we unconditionally enable all PCH interrupt sources here, but then
3609 * only unmask them as needed with SDEIMR.
3610 *
3611 * Note that we currently do this after installing the interrupt handler,
3612 * but before we enable the master interrupt. That should be sufficient
3613 * to avoid races with the irq handler, assuming we have MSI. Shared legacy
3614 * interrupts could still race.
3615 */
3616static void ibx_irq_postinstall(struct drm_i915_private *dev_priv)
3617{
3618 struct intel_uncore *uncore = &dev_priv->uncore;
3619 u32 mask;
3620
3621 if (HAS_PCH_NOP(dev_priv))
3622 return;
3623
3624 if (HAS_PCH_IBX(dev_priv))
3625 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
3626 else if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
3627 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
3628 else
3629 mask = SDE_GMBUS_CPT;
3630
3631 GEN3_IRQ_INIT(uncore, SDE, ~mask, 0xffffffff);
3632}
3633
3634static void ilk_irq_postinstall(struct drm_i915_private *dev_priv)
3635{
3636 struct intel_uncore *uncore = &dev_priv->uncore;
3637 u32 display_mask, extra_mask;
3638
3639 if (GRAPHICS_VER(dev_priv) >= 7) {
3640 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
3641 DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB);
3642 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
3643 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
3644 DE_PLANE_FLIP_DONE_IVB(PLANE_C) |
3645 DE_PLANE_FLIP_DONE_IVB(PLANE_B) |
3646 DE_PLANE_FLIP_DONE_IVB(PLANE_A) |
3647 DE_DP_A_HOTPLUG_IVB);
3648 } else {
3649 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
3650 DE_AUX_CHANNEL_A | DE_PIPEB_CRC_DONE |
3651 DE_PIPEA_CRC_DONE | DE_POISON);
3652 extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK |
3653 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
3654 DE_PLANE_FLIP_DONE(PLANE_A) |
3655 DE_PLANE_FLIP_DONE(PLANE_B) |
3656 DE_DP_A_HOTPLUG);
3657 }
3658
3659 if (IS_HASWELL(dev_priv)) {
3660 gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
3661 display_mask |= DE_EDP_PSR_INT_HSW;
3662 }
3663
3664 if (IS_IRONLAKE_M(dev_priv))
3665 extra_mask |= DE_PCU_EVENT;
3666
3667 dev_priv->irq_mask = ~display_mask;
3668
3669 ibx_irq_postinstall(dev_priv);
3670
3671 gen5_gt_irq_postinstall(&dev_priv->gt);
3672
3673 GEN3_IRQ_INIT(uncore, DE, dev_priv->irq_mask,
3674 display_mask | extra_mask);
3675}
3676
3677void valleyview_enable_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 = true;
3685
3686 if (intel_irqs_enabled(dev_priv)) {
3687 vlv_display_irq_reset(dev_priv);
3688 vlv_display_irq_postinstall(dev_priv);
3689 }
3690}
3691
3692void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
3693{
3694 lockdep_assert_held(&dev_priv->irq_lock);
3695
3696 if (!dev_priv->display_irqs_enabled)
3697 return;
3698
3699 dev_priv->display_irqs_enabled = false;
3700
3701 if (intel_irqs_enabled(dev_priv))
3702 vlv_display_irq_reset(dev_priv);
3703}
3704
3705
3706static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv)
3707{
3708 gen5_gt_irq_postinstall(&dev_priv->gt);
3709
3710 spin_lock_irq(&dev_priv->irq_lock);
3711 if (dev_priv->display_irqs_enabled)
3712 vlv_display_irq_postinstall(dev_priv);
3713 spin_unlock_irq(&dev_priv->irq_lock);
3714
3715 intel_uncore_write(&dev_priv->uncore, VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3716 intel_uncore_posting_read(&dev_priv->uncore, VLV_MASTER_IER);
3717}
3718
3719static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
3720{
3721 struct intel_uncore *uncore = &dev_priv->uncore;
3722
3723 u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) |
3724 GEN8_PIPE_CDCLK_CRC_DONE;
3725 u32 de_pipe_enables;
3726 u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
3727 u32 de_port_enables;
3728 u32 de_misc_masked = GEN8_DE_EDP_PSR;
3729 u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
3730 BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
3731 enum pipe pipe;
3732
3733 if (!HAS_DISPLAY(dev_priv))
3734 return;
3735
3736 if (DISPLAY_VER(dev_priv) <= 10)
3737 de_misc_masked |= GEN8_DE_MISC_GSE;
3738
3739 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
3740 de_port_masked |= BXT_DE_PORT_GMBUS;
3741
3742 if (DISPLAY_VER(dev_priv) >= 11) {
3743 enum port port;
3744
3745 if (intel_bios_is_dsi_present(dev_priv, &port))
3746 de_port_masked |= DSI0_TE | DSI1_TE;
3747 }
3748
3749 de_pipe_enables = de_pipe_masked |
3750 GEN8_PIPE_VBLANK |
3751 gen8_de_pipe_underrun_mask(dev_priv) |
3752 gen8_de_pipe_flip_done_mask(dev_priv);
3753
3754 de_port_enables = de_port_masked;
3755 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
3756 de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
3757 else if (IS_BROADWELL(dev_priv))
3758 de_port_enables |= BDW_DE_PORT_HOTPLUG_MASK;
3759
3760 if (DISPLAY_VER(dev_priv) >= 12) {
3761 enum transcoder trans;
3762
3763 for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
3764 enum intel_display_power_domain domain;
3765
3766 domain = POWER_DOMAIN_TRANSCODER(trans);
3767 if (!intel_display_power_is_enabled(dev_priv, domain))
3768 continue;
3769
3770 gen3_assert_iir_is_zero(uncore, TRANS_PSR_IIR(trans));
3771 }
3772 } else {
3773 gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
3774 }
3775
3776 for_each_pipe(dev_priv, pipe) {
3777 dev_priv->de_irq_mask[pipe] = ~de_pipe_masked;
3778
3779 if (intel_display_power_is_enabled(dev_priv,
3780 POWER_DOMAIN_PIPE(pipe)))
3781 GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
3782 dev_priv->de_irq_mask[pipe],
3783 de_pipe_enables);
3784 }
3785
3786 GEN3_IRQ_INIT(uncore, GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
3787 GEN3_IRQ_INIT(uncore, GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);
3788
3789 if (DISPLAY_VER(dev_priv) >= 11) {
3790 u32 de_hpd_masked = 0;
3791 u32 de_hpd_enables = GEN11_DE_TC_HOTPLUG_MASK |
3792 GEN11_DE_TBT_HOTPLUG_MASK;
3793
3794 GEN3_IRQ_INIT(uncore, GEN11_DE_HPD_, ~de_hpd_masked,
3795 de_hpd_enables);
3796 }
3797}
3798
3799static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
3800{
3801 struct intel_uncore *uncore = &dev_priv->uncore;
3802 u32 mask = SDE_GMBUS_ICP;
3803
3804 GEN3_IRQ_INIT(uncore, SDE, ~mask, 0xffffffff);
3805}
3806
3807static void gen8_irq_postinstall(struct drm_i915_private *dev_priv)
3808{
3809 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
3810 icp_irq_postinstall(dev_priv);
3811 else if (HAS_PCH_SPLIT(dev_priv))
3812 ibx_irq_postinstall(dev_priv);
3813
3814 gen8_gt_irq_postinstall(&dev_priv->gt);
3815 gen8_de_irq_postinstall(dev_priv);
3816
3817 gen8_master_intr_enable(dev_priv->uncore.regs);
3818}
3819
3820static void gen11_de_irq_postinstall(struct drm_i915_private *dev_priv)
3821{
3822 if (!HAS_DISPLAY(dev_priv))
3823 return;
3824
3825 gen8_de_irq_postinstall(dev_priv);
3826
3827 intel_uncore_write(&dev_priv->uncore, GEN11_DISPLAY_INT_CTL,
3828 GEN11_DISPLAY_IRQ_ENABLE);
3829}
3830
3831static void gen11_irq_postinstall(struct drm_i915_private *dev_priv)
3832{
3833 struct intel_uncore *uncore = &dev_priv->uncore;
3834 u32 gu_misc_masked = GEN11_GU_MISC_GSE;
3835
3836 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
3837 icp_irq_postinstall(dev_priv);
3838
3839 gen11_gt_irq_postinstall(&dev_priv->gt);
3840 gen11_de_irq_postinstall(dev_priv);
3841
3842 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked);
3843
3844 if (HAS_MASTER_UNIT_IRQ(dev_priv)) {
3845 dg1_master_intr_enable(uncore->regs);
3846 intel_uncore_posting_read(&dev_priv->uncore, DG1_MSTR_UNIT_INTR);
3847 } else {
3848 gen11_master_intr_enable(uncore->regs);
3849 intel_uncore_posting_read(&dev_priv->uncore, GEN11_GFX_MSTR_IRQ);
3850 }
3851}
3852
3853static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv)
3854{
3855 gen8_gt_irq_postinstall(&dev_priv->gt);
3856
3857 spin_lock_irq(&dev_priv->irq_lock);
3858 if (dev_priv->display_irqs_enabled)
3859 vlv_display_irq_postinstall(dev_priv);
3860 spin_unlock_irq(&dev_priv->irq_lock);
3861
3862 intel_uncore_write(&dev_priv->uncore, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
3863 intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ);
3864}
3865
3866static void i8xx_irq_reset(struct drm_i915_private *dev_priv)
3867{
3868 struct intel_uncore *uncore = &dev_priv->uncore;
3869
3870 i9xx_pipestat_irq_reset(dev_priv);
3871
3872 GEN2_IRQ_RESET(uncore);
3873 dev_priv->irq_mask = ~0u;
3874}
3875
3876static void i8xx_irq_postinstall(struct drm_i915_private *dev_priv)
3877{
3878 struct intel_uncore *uncore = &dev_priv->uncore;
3879 u16 enable_mask;
3880
3881 intel_uncore_write16(uncore,
3882 EMR,
3883 ~(I915_ERROR_PAGE_TABLE |
3884 I915_ERROR_MEMORY_REFRESH));
3885
3886 /* Unmask the interrupts that we always want on. */
3887 dev_priv->irq_mask =
3888 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3889 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3890 I915_MASTER_ERROR_INTERRUPT);
3891
3892 enable_mask =
3893 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3894 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3895 I915_MASTER_ERROR_INTERRUPT |
3896 I915_USER_INTERRUPT;
3897
3898 GEN2_IRQ_INIT(uncore, dev_priv->irq_mask, enable_mask);
3899
3900 /* Interrupt setup is already guaranteed to be single-threaded, this is
3901 * just to make the assert_spin_locked check happy. */
3902 spin_lock_irq(&dev_priv->irq_lock);
3903 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3904 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3905 spin_unlock_irq(&dev_priv->irq_lock);
3906}
3907
3908static void i8xx_error_irq_ack(struct drm_i915_private *i915,
3909 u16 *eir, u16 *eir_stuck)
3910{
3911 struct intel_uncore *uncore = &i915->uncore;
3912 u16 emr;
3913
3914 *eir = intel_uncore_read16(uncore, EIR);
3915
3916 if (*eir)
3917 intel_uncore_write16(uncore, EIR, *eir);
3918
3919 *eir_stuck = intel_uncore_read16(uncore, EIR);
3920 if (*eir_stuck == 0)
3921 return;
3922
3923 /*
3924 * Toggle all EMR bits to make sure we get an edge
3925 * in the ISR master error bit if we don't clear
3926 * all the EIR bits. Otherwise the edge triggered
3927 * IIR on i965/g4x wouldn't notice that an interrupt
3928 * is still pending. Also some EIR bits can't be
3929 * cleared except by handling the underlying error
3930 * (or by a GPU reset) so we mask any bit that
3931 * remains set.
3932 */
3933 emr = intel_uncore_read16(uncore, EMR);
3934 intel_uncore_write16(uncore, EMR, 0xffff);
3935 intel_uncore_write16(uncore, EMR, emr | *eir_stuck);
3936}
3937
3938static void i8xx_error_irq_handler(struct drm_i915_private *dev_priv,
3939 u16 eir, u16 eir_stuck)
3940{
3941 DRM_DEBUG("Master Error: EIR 0x%04x\n", eir);
3942
3943 if (eir_stuck)
3944 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%04x, masked\n",
3945 eir_stuck);
3946}
3947
3948static void i9xx_error_irq_ack(struct drm_i915_private *dev_priv,
3949 u32 *eir, u32 *eir_stuck)
3950{
3951 u32 emr;
3952
3953 *eir = intel_uncore_read(&dev_priv->uncore, EIR);
3954
3955 intel_uncore_write(&dev_priv->uncore, EIR, *eir);
3956
3957 *eir_stuck = intel_uncore_read(&dev_priv->uncore, EIR);
3958 if (*eir_stuck == 0)
3959 return;
3960
3961 /*
3962 * Toggle all EMR bits to make sure we get an edge
3963 * in the ISR master error bit if we don't clear
3964 * all the EIR bits. Otherwise the edge triggered
3965 * IIR on i965/g4x wouldn't notice that an interrupt
3966 * is still pending. Also some EIR bits can't be
3967 * cleared except by handling the underlying error
3968 * (or by a GPU reset) so we mask any bit that
3969 * remains set.
3970 */
3971 emr = intel_uncore_read(&dev_priv->uncore, EMR);
3972 intel_uncore_write(&dev_priv->uncore, EMR, 0xffffffff);
3973 intel_uncore_write(&dev_priv->uncore, EMR, emr | *eir_stuck);
3974}
3975
3976static void i9xx_error_irq_handler(struct drm_i915_private *dev_priv,
3977 u32 eir, u32 eir_stuck)
3978{
3979 DRM_DEBUG("Master Error, EIR 0x%08x\n", eir);
3980
3981 if (eir_stuck)
3982 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%08x, masked\n",
3983 eir_stuck);
3984}
3985
3986static irqreturn_t i8xx_irq_handler(int irq, void *arg)
3987{
3988 struct drm_i915_private *dev_priv = arg;
3989 irqreturn_t ret = IRQ_NONE;
3990
3991 if (!intel_irqs_enabled(dev_priv))
3992 return IRQ_NONE;
3993
3994 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
3995 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3996
3997 do {
3998 u32 pipe_stats[I915_MAX_PIPES] = {};
3999 u16 eir = 0, eir_stuck = 0;
4000 u16 iir;
4001
4002 iir = intel_uncore_read16(&dev_priv->uncore, GEN2_IIR);
4003 if (iir == 0)
4004 break;
4005
4006 ret = IRQ_HANDLED;
4007
4008 /* Call regardless, as some status bits might not be
4009 * signalled in iir */
4010 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
4011
4012 if (iir & I915_MASTER_ERROR_INTERRUPT)
4013 i8xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
4014
4015 intel_uncore_write16(&dev_priv->uncore, GEN2_IIR, iir);
4016
4017 if (iir & I915_USER_INTERRUPT)
4018 intel_engine_cs_irq(dev_priv->gt.engine[RCS0], iir);
4019
4020 if (iir & I915_MASTER_ERROR_INTERRUPT)
4021 i8xx_error_irq_handler(dev_priv, eir, eir_stuck);
4022
4023 i8xx_pipestat_irq_handler(dev_priv, iir, pipe_stats);
4024 } while (0);
4025
4026 pmu_irq_stats(dev_priv, ret);
4027
4028 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
4029
4030 return ret;
4031}
4032
4033static void i915_irq_reset(struct drm_i915_private *dev_priv)
4034{
4035 struct intel_uncore *uncore = &dev_priv->uncore;
4036
4037 if (I915_HAS_HOTPLUG(dev_priv)) {
4038 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4039 intel_uncore_write(&dev_priv->uncore, PORT_HOTPLUG_STAT, intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT));
4040 }
4041
4042 i9xx_pipestat_irq_reset(dev_priv);
4043
4044 GEN3_IRQ_RESET(uncore, GEN2_);
4045 dev_priv->irq_mask = ~0u;
4046}
4047
4048static void i915_irq_postinstall(struct drm_i915_private *dev_priv)
4049{
4050 struct intel_uncore *uncore = &dev_priv->uncore;
4051 u32 enable_mask;
4052
4053 intel_uncore_write(&dev_priv->uncore, EMR, ~(I915_ERROR_PAGE_TABLE |
4054 I915_ERROR_MEMORY_REFRESH));
4055
4056 /* Unmask the interrupts that we always want on. */
4057 dev_priv->irq_mask =
4058 ~(I915_ASLE_INTERRUPT |
4059 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4060 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4061 I915_MASTER_ERROR_INTERRUPT);
4062
4063 enable_mask =
4064 I915_ASLE_INTERRUPT |
4065 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4066 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4067 I915_MASTER_ERROR_INTERRUPT |
4068 I915_USER_INTERRUPT;
4069
4070 if (I915_HAS_HOTPLUG(dev_priv)) {
4071 /* Enable in IER... */
4072 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
4073 /* and unmask in IMR */
4074 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
4075 }
4076
4077 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask);
4078
4079 /* Interrupt setup is already guaranteed to be single-threaded, this is
4080 * just to make the assert_spin_locked check happy. */
4081 spin_lock_irq(&dev_priv->irq_lock);
4082 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4083 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4084 spin_unlock_irq(&dev_priv->irq_lock);
4085
4086 i915_enable_asle_pipestat(dev_priv);
4087}
4088
4089static irqreturn_t i915_irq_handler(int irq, void *arg)
4090{
4091 struct drm_i915_private *dev_priv = arg;
4092 irqreturn_t ret = IRQ_NONE;
4093
4094 if (!intel_irqs_enabled(dev_priv))
4095 return IRQ_NONE;
4096
4097 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4098 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
4099
4100 do {
4101 u32 pipe_stats[I915_MAX_PIPES] = {};
4102 u32 eir = 0, eir_stuck = 0;
4103 u32 hotplug_status = 0;
4104 u32 iir;
4105
4106 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR);
4107 if (iir == 0)
4108 break;
4109
4110 ret = IRQ_HANDLED;
4111
4112 if (I915_HAS_HOTPLUG(dev_priv) &&
4113 iir & I915_DISPLAY_PORT_INTERRUPT)
4114 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
4115
4116 /* Call regardless, as some status bits might not be
4117 * signalled in iir */
4118 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
4119
4120 if (iir & I915_MASTER_ERROR_INTERRUPT)
4121 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
4122
4123 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir);
4124
4125 if (iir & I915_USER_INTERRUPT)
4126 intel_engine_cs_irq(dev_priv->gt.engine[RCS0], iir);
4127
4128 if (iir & I915_MASTER_ERROR_INTERRUPT)
4129 i9xx_error_irq_handler(dev_priv, eir, eir_stuck);
4130
4131 if (hotplug_status)
4132 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
4133
4134 i915_pipestat_irq_handler(dev_priv, iir, pipe_stats);
4135 } while (0);
4136
4137 pmu_irq_stats(dev_priv, ret);
4138
4139 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
4140
4141 return ret;
4142}
4143
4144static void i965_irq_reset(struct drm_i915_private *dev_priv)
4145{
4146 struct intel_uncore *uncore = &dev_priv->uncore;
4147
4148 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4149 intel_uncore_write(&dev_priv->uncore, PORT_HOTPLUG_STAT, intel_uncore_read(&dev_priv->uncore, PORT_HOTPLUG_STAT));
4150
4151 i9xx_pipestat_irq_reset(dev_priv);
4152
4153 GEN3_IRQ_RESET(uncore, GEN2_);
4154 dev_priv->irq_mask = ~0u;
4155}
4156
4157static void i965_irq_postinstall(struct drm_i915_private *dev_priv)
4158{
4159 struct intel_uncore *uncore = &dev_priv->uncore;
4160 u32 enable_mask;
4161 u32 error_mask;
4162
4163 /*
4164 * Enable some error detection, note the instruction error mask
4165 * bit is reserved, so we leave it masked.
4166 */
4167 if (IS_G4X(dev_priv)) {
4168 error_mask = ~(GM45_ERROR_PAGE_TABLE |
4169 GM45_ERROR_MEM_PRIV |
4170 GM45_ERROR_CP_PRIV |
4171 I915_ERROR_MEMORY_REFRESH);
4172 } else {
4173 error_mask = ~(I915_ERROR_PAGE_TABLE |
4174 I915_ERROR_MEMORY_REFRESH);
4175 }
4176 intel_uncore_write(&dev_priv->uncore, EMR, error_mask);
4177
4178 /* Unmask the interrupts that we always want on. */
4179 dev_priv->irq_mask =
4180 ~(I915_ASLE_INTERRUPT |
4181 I915_DISPLAY_PORT_INTERRUPT |
4182 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4183 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4184 I915_MASTER_ERROR_INTERRUPT);
4185
4186 enable_mask =
4187 I915_ASLE_INTERRUPT |
4188 I915_DISPLAY_PORT_INTERRUPT |
4189 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4190 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4191 I915_MASTER_ERROR_INTERRUPT |
4192 I915_USER_INTERRUPT;
4193
4194 if (IS_G4X(dev_priv))
4195 enable_mask |= I915_BSD_USER_INTERRUPT;
4196
4197 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask);
4198
4199 /* Interrupt setup is already guaranteed to be single-threaded, this is
4200 * just to make the assert_spin_locked check happy. */
4201 spin_lock_irq(&dev_priv->irq_lock);
4202 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
4203 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4204 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4205 spin_unlock_irq(&dev_priv->irq_lock);
4206
4207 i915_enable_asle_pipestat(dev_priv);
4208}
4209
4210static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv)
4211{
4212 u32 hotplug_en;
4213
4214 lockdep_assert_held(&dev_priv->irq_lock);
4215
4216 /* Note HDMI and DP share hotplug bits */
4217 /* enable bits are the same for all generations */
4218 hotplug_en = intel_hpd_enabled_irqs(dev_priv, hpd_mask_i915);
4219 /* Programming the CRT detection parameters tends
4220 to generate a spurious hotplug event about three
4221 seconds later. So just do it once.
4222 */
4223 if (IS_G4X(dev_priv))
4224 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
4225 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
4226
4227 /* Ignore TV since it's buggy */
4228 i915_hotplug_interrupt_update_locked(dev_priv,
4229 HOTPLUG_INT_EN_MASK |
4230 CRT_HOTPLUG_VOLTAGE_COMPARE_MASK |
4231 CRT_HOTPLUG_ACTIVATION_PERIOD_64,
4232 hotplug_en);
4233}
4234
4235static irqreturn_t i965_irq_handler(int irq, void *arg)
4236{
4237 struct drm_i915_private *dev_priv = arg;
4238 irqreturn_t ret = IRQ_NONE;
4239
4240 if (!intel_irqs_enabled(dev_priv))
4241 return IRQ_NONE;
4242
4243 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4244 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
4245
4246 do {
4247 u32 pipe_stats[I915_MAX_PIPES] = {};
4248 u32 eir = 0, eir_stuck = 0;
4249 u32 hotplug_status = 0;
4250 u32 iir;
4251
4252 iir = intel_uncore_read(&dev_priv->uncore, GEN2_IIR);
4253 if (iir == 0)
4254 break;
4255
4256 ret = IRQ_HANDLED;
4257
4258 if (iir & I915_DISPLAY_PORT_INTERRUPT)
4259 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
4260
4261 /* Call regardless, as some status bits might not be
4262 * signalled in iir */
4263 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
4264
4265 if (iir & I915_MASTER_ERROR_INTERRUPT)
4266 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
4267
4268 intel_uncore_write(&dev_priv->uncore, GEN2_IIR, iir);
4269
4270 if (iir & I915_USER_INTERRUPT)
4271 intel_engine_cs_irq(dev_priv->gt.engine[RCS0],
4272 iir);
4273
4274 if (iir & I915_BSD_USER_INTERRUPT)
4275 intel_engine_cs_irq(dev_priv->gt.engine[VCS0],
4276 iir >> 25);
4277
4278 if (iir & I915_MASTER_ERROR_INTERRUPT)
4279 i9xx_error_irq_handler(dev_priv, eir, eir_stuck);
4280
4281 if (hotplug_status)
4282 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
4283
4284 i965_pipestat_irq_handler(dev_priv, iir, pipe_stats);
4285 } while (0);
4286
4287 pmu_irq_stats(dev_priv, IRQ_HANDLED);
4288
4289 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
4290
4291 return ret;
4292}
4293
4294/**
4295 * intel_irq_init - initializes irq support
4296 * @dev_priv: i915 device instance
4297 *
4298 * This function initializes all the irq support including work items, timers
4299 * and all the vtables. It does not setup the interrupt itself though.
4300 */
4301void intel_irq_init(struct drm_i915_private *dev_priv)
4302{
4303 struct drm_device *dev = &dev_priv->drm;
4304 int i;
4305
4306 INIT_WORK(&dev_priv->l3_parity.error_work, ivb_parity_work);
4307 for (i = 0; i < MAX_L3_SLICES; ++i)
4308 dev_priv->l3_parity.remap_info[i] = NULL;
4309
4310 /* pre-gen11 the guc irqs bits are in the upper 16 bits of the pm reg */
4311 if (HAS_GT_UC(dev_priv) && GRAPHICS_VER(dev_priv) < 11)
4312 dev_priv->gt.pm_guc_events = GUC_INTR_GUC2HOST << 16;
4313
4314 if (!HAS_DISPLAY(dev_priv))
4315 return;
4316
4317 intel_hpd_init_pins(dev_priv);
4318
4319 intel_hpd_init_work(dev_priv);
4320
4321 dev->vblank_disable_immediate = true;
4322
4323 /* Most platforms treat the display irq block as an always-on
4324 * power domain. vlv/chv can disable it at runtime and need
4325 * special care to avoid writing any of the display block registers
4326 * outside of the power domain. We defer setting up the display irqs
4327 * in this case to the runtime pm.
4328 */
4329 dev_priv->display_irqs_enabled = true;
4330 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
4331 dev_priv->display_irqs_enabled = false;
4332
4333 dev_priv->hotplug.hpd_storm_threshold = HPD_STORM_DEFAULT_THRESHOLD;
4334 /* If we have MST support, we want to avoid doing short HPD IRQ storm
4335 * detection, as short HPD storms will occur as a natural part of
4336 * sideband messaging with MST.
4337 * On older platforms however, IRQ storms can occur with both long and
4338 * short pulses, as seen on some G4x systems.
4339 */
4340 dev_priv->hotplug.hpd_short_storm_enabled = !HAS_DP_MST(dev_priv);
4341
4342 if (HAS_GMCH(dev_priv)) {
4343 if (I915_HAS_HOTPLUG(dev_priv))
4344 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4345 } else {
4346 if (HAS_PCH_DG1(dev_priv))
4347 dev_priv->display.hpd_irq_setup = dg1_hpd_irq_setup;
4348 else if (DISPLAY_VER(dev_priv) >= 11)
4349 dev_priv->display.hpd_irq_setup = gen11_hpd_irq_setup;
4350 else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
4351 dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
4352 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
4353 dev_priv->display.hpd_irq_setup = icp_hpd_irq_setup;
4354 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT)
4355 dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
4356 else
4357 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4358 }
4359}
4360
4361/**
4362 * intel_irq_fini - deinitializes IRQ support
4363 * @i915: i915 device instance
4364 *
4365 * This function deinitializes all the IRQ support.
4366 */
4367void intel_irq_fini(struct drm_i915_private *i915)
4368{
4369 int i;
4370
4371 for (i = 0; i < MAX_L3_SLICES; ++i)
4372 kfree(i915->l3_parity.remap_info[i]);
4373}
4374
4375static irq_handler_t intel_irq_handler(struct drm_i915_private *dev_priv)
4376{
4377 if (HAS_GMCH(dev_priv)) {
4378 if (IS_CHERRYVIEW(dev_priv))
4379 return cherryview_irq_handler;
4380 else if (IS_VALLEYVIEW(dev_priv))
4381 return valleyview_irq_handler;
4382 else if (GRAPHICS_VER(dev_priv) == 4)
4383 return i965_irq_handler;
4384 else if (GRAPHICS_VER(dev_priv) == 3)
4385 return i915_irq_handler;
4386 else
4387 return i8xx_irq_handler;
4388 } else {
4389 if (HAS_MASTER_UNIT_IRQ(dev_priv))
4390 return dg1_irq_handler;
4391 if (GRAPHICS_VER(dev_priv) >= 11)
4392 return gen11_irq_handler;
4393 else if (GRAPHICS_VER(dev_priv) >= 8)
4394 return gen8_irq_handler;
4395 else
4396 return ilk_irq_handler;
4397 }
4398}
4399
4400static void intel_irq_reset(struct drm_i915_private *dev_priv)
4401{
4402 if (HAS_GMCH(dev_priv)) {
4403 if (IS_CHERRYVIEW(dev_priv))
4404 cherryview_irq_reset(dev_priv);
4405 else if (IS_VALLEYVIEW(dev_priv))
4406 valleyview_irq_reset(dev_priv);
4407 else if (GRAPHICS_VER(dev_priv) == 4)
4408 i965_irq_reset(dev_priv);
4409 else if (GRAPHICS_VER(dev_priv) == 3)
4410 i915_irq_reset(dev_priv);
4411 else
4412 i8xx_irq_reset(dev_priv);
4413 } else {
4414 if (GRAPHICS_VER(dev_priv) >= 11)
4415 gen11_irq_reset(dev_priv);
4416 else if (GRAPHICS_VER(dev_priv) >= 8)
4417 gen8_irq_reset(dev_priv);
4418 else
4419 ilk_irq_reset(dev_priv);
4420 }
4421}
4422
4423static void intel_irq_postinstall(struct drm_i915_private *dev_priv)
4424{
4425 if (HAS_GMCH(dev_priv)) {
4426 if (IS_CHERRYVIEW(dev_priv))
4427 cherryview_irq_postinstall(dev_priv);
4428 else if (IS_VALLEYVIEW(dev_priv))
4429 valleyview_irq_postinstall(dev_priv);
4430 else if (GRAPHICS_VER(dev_priv) == 4)
4431 i965_irq_postinstall(dev_priv);
4432 else if (GRAPHICS_VER(dev_priv) == 3)
4433 i915_irq_postinstall(dev_priv);
4434 else
4435 i8xx_irq_postinstall(dev_priv);
4436 } else {
4437 if (GRAPHICS_VER(dev_priv) >= 11)
4438 gen11_irq_postinstall(dev_priv);
4439 else if (GRAPHICS_VER(dev_priv) >= 8)
4440 gen8_irq_postinstall(dev_priv);
4441 else
4442 ilk_irq_postinstall(dev_priv);
4443 }
4444}
4445
4446/**
4447 * intel_irq_install - enables the hardware interrupt
4448 * @dev_priv: i915 device instance
4449 *
4450 * This function enables the hardware interrupt handling, but leaves the hotplug
4451 * handling still disabled. It is called after intel_irq_init().
4452 *
4453 * In the driver load and resume code we need working interrupts in a few places
4454 * but don't want to deal with the hassle of concurrent probe and hotplug
4455 * workers. Hence the split into this two-stage approach.
4456 */
4457int intel_irq_install(struct drm_i915_private *dev_priv)
4458{
4459 int irq = to_pci_dev(dev_priv->drm.dev)->irq;
4460 int ret;
4461
4462 /*
4463 * We enable some interrupt sources in our postinstall hooks, so mark
4464 * interrupts as enabled _before_ actually enabling them to avoid
4465 * special cases in our ordering checks.
4466 */
4467 dev_priv->runtime_pm.irqs_enabled = true;
4468
4469 dev_priv->drm.irq_enabled = true;
4470
4471 intel_irq_reset(dev_priv);
4472
4473 ret = request_irq(irq, intel_irq_handler(dev_priv),
4474 IRQF_SHARED, DRIVER_NAME, dev_priv);
4475 if (ret < 0) {
4476 dev_priv->drm.irq_enabled = false;
4477 return ret;
4478 }
4479
4480 intel_irq_postinstall(dev_priv);
4481
4482 return ret;
4483}
4484
4485/**
4486 * intel_irq_uninstall - finilizes all irq handling
4487 * @dev_priv: i915 device instance
4488 *
4489 * This stops interrupt and hotplug handling and unregisters and frees all
4490 * resources acquired in the init functions.
4491 */
4492void intel_irq_uninstall(struct drm_i915_private *dev_priv)
4493{
4494 int irq = to_pci_dev(dev_priv->drm.dev)->irq;
4495
4496 /*
4497 * FIXME we can get called twice during driver probe
4498 * error handling as well as during driver remove due to
4499 * intel_modeset_driver_remove() calling us out of sequence.
4500 * Would be nice if it didn't do that...
4501 */
4502 if (!dev_priv->drm.irq_enabled)
4503 return;
4504
4505 dev_priv->drm.irq_enabled = false;
4506
4507 intel_irq_reset(dev_priv);
4508
4509 free_irq(irq, dev_priv);
4510
4511 intel_hpd_cancel_work(dev_priv);
4512 dev_priv->runtime_pm.irqs_enabled = false;
4513}
4514
4515/**
4516 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4517 * @dev_priv: i915 device instance
4518 *
4519 * This function is used to disable interrupts at runtime, both in the runtime
4520 * pm and the system suspend/resume code.
4521 */
4522void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
4523{
4524 intel_irq_reset(dev_priv);
4525 dev_priv->runtime_pm.irqs_enabled = false;
4526 intel_synchronize_irq(dev_priv);
4527}
4528
4529/**
4530 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4531 * @dev_priv: i915 device instance
4532 *
4533 * This function is used to enable interrupts at runtime, both in the runtime
4534 * pm and the system suspend/resume code.
4535 */
4536void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
4537{
4538 dev_priv->runtime_pm.irqs_enabled = true;
4539 intel_irq_reset(dev_priv);
4540 intel_irq_postinstall(dev_priv);
4541}
4542
4543bool intel_irqs_enabled(struct drm_i915_private *dev_priv)
4544{
4545 return dev_priv->runtime_pm.irqs_enabled;
4546}
4547
4548void intel_synchronize_irq(struct drm_i915_private *i915)
4549{
4550 synchronize_irq(to_pci_dev(i915->drm.dev)->irq);
4551}
4552
4553void intel_synchronize_hardirq(struct drm_i915_private *i915)
4554{
4555 synchronize_hardirq(to_pci_dev(i915->drm.dev)->irq);
4556}
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_gt.h"
45#include "gt/intel_gt_irq.h"
46#include "gt/intel_gt_pm_irq.h"
47#include "gt/intel_rps.h"
48
49#include "i915_drv.h"
50#include "i915_irq.h"
51#include "i915_trace.h"
52#include "intel_pm.h"
53
54/**
55 * DOC: interrupt handling
56 *
57 * These functions provide the basic support for enabling and disabling the
58 * interrupt handling support. There's a lot more functionality in i915_irq.c
59 * and related files, but that will be described in separate chapters.
60 */
61
62typedef bool (*long_pulse_detect_func)(enum hpd_pin pin, u32 val);
63
64static const u32 hpd_ilk[HPD_NUM_PINS] = {
65 [HPD_PORT_A] = DE_DP_A_HOTPLUG,
66};
67
68static const u32 hpd_ivb[HPD_NUM_PINS] = {
69 [HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,
70};
71
72static const u32 hpd_bdw[HPD_NUM_PINS] = {
73 [HPD_PORT_A] = GEN8_PORT_DP_A_HOTPLUG,
74};
75
76static const u32 hpd_ibx[HPD_NUM_PINS] = {
77 [HPD_CRT] = SDE_CRT_HOTPLUG,
78 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
79 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
80 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
81 [HPD_PORT_D] = SDE_PORTD_HOTPLUG,
82};
83
84static const u32 hpd_cpt[HPD_NUM_PINS] = {
85 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
86 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
87 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
88 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
89 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT,
90};
91
92static const u32 hpd_spt[HPD_NUM_PINS] = {
93 [HPD_PORT_A] = SDE_PORTA_HOTPLUG_SPT,
94 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
95 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
96 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT,
97 [HPD_PORT_E] = SDE_PORTE_HOTPLUG_SPT,
98};
99
100static const u32 hpd_mask_i915[HPD_NUM_PINS] = {
101 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
102 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
103 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
104 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
105 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
106 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN,
107};
108
109static const u32 hpd_status_g4x[HPD_NUM_PINS] = {
110 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
111 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
112 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
113 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
114 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
115 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS,
116};
117
118static const u32 hpd_status_i915[HPD_NUM_PINS] = {
119 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
120 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
121 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
122 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
123 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
124 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS,
125};
126
127static const u32 hpd_bxt[HPD_NUM_PINS] = {
128 [HPD_PORT_A] = BXT_DE_PORT_HP_DDIA,
129 [HPD_PORT_B] = BXT_DE_PORT_HP_DDIB,
130 [HPD_PORT_C] = BXT_DE_PORT_HP_DDIC,
131};
132
133static const u32 hpd_gen11[HPD_NUM_PINS] = {
134 [HPD_PORT_C] = GEN11_TC1_HOTPLUG | GEN11_TBT1_HOTPLUG,
135 [HPD_PORT_D] = GEN11_TC2_HOTPLUG | GEN11_TBT2_HOTPLUG,
136 [HPD_PORT_E] = GEN11_TC3_HOTPLUG | GEN11_TBT3_HOTPLUG,
137 [HPD_PORT_F] = GEN11_TC4_HOTPLUG | GEN11_TBT4_HOTPLUG,
138};
139
140static const u32 hpd_gen12[HPD_NUM_PINS] = {
141 [HPD_PORT_D] = GEN11_TC1_HOTPLUG | GEN11_TBT1_HOTPLUG,
142 [HPD_PORT_E] = GEN11_TC2_HOTPLUG | GEN11_TBT2_HOTPLUG,
143 [HPD_PORT_F] = GEN11_TC3_HOTPLUG | GEN11_TBT3_HOTPLUG,
144 [HPD_PORT_G] = GEN11_TC4_HOTPLUG | GEN11_TBT4_HOTPLUG,
145 [HPD_PORT_H] = GEN12_TC5_HOTPLUG | GEN12_TBT5_HOTPLUG,
146 [HPD_PORT_I] = GEN12_TC6_HOTPLUG | GEN12_TBT6_HOTPLUG,
147};
148
149static const u32 hpd_icp[HPD_NUM_PINS] = {
150 [HPD_PORT_A] = SDE_DDI_HOTPLUG_ICP(PORT_A),
151 [HPD_PORT_B] = SDE_DDI_HOTPLUG_ICP(PORT_B),
152 [HPD_PORT_C] = SDE_TC_HOTPLUG_ICP(PORT_TC1),
153 [HPD_PORT_D] = SDE_TC_HOTPLUG_ICP(PORT_TC2),
154 [HPD_PORT_E] = SDE_TC_HOTPLUG_ICP(PORT_TC3),
155 [HPD_PORT_F] = SDE_TC_HOTPLUG_ICP(PORT_TC4),
156};
157
158static const u32 hpd_tgp[HPD_NUM_PINS] = {
159 [HPD_PORT_A] = SDE_DDI_HOTPLUG_ICP(PORT_A),
160 [HPD_PORT_B] = SDE_DDI_HOTPLUG_ICP(PORT_B),
161 [HPD_PORT_C] = SDE_DDI_HOTPLUG_ICP(PORT_C),
162 [HPD_PORT_D] = SDE_TC_HOTPLUG_ICP(PORT_TC1),
163 [HPD_PORT_E] = SDE_TC_HOTPLUG_ICP(PORT_TC2),
164 [HPD_PORT_F] = SDE_TC_HOTPLUG_ICP(PORT_TC3),
165 [HPD_PORT_G] = SDE_TC_HOTPLUG_ICP(PORT_TC4),
166 [HPD_PORT_H] = SDE_TC_HOTPLUG_ICP(PORT_TC5),
167 [HPD_PORT_I] = SDE_TC_HOTPLUG_ICP(PORT_TC6),
168};
169
170static void intel_hpd_init_pins(struct drm_i915_private *dev_priv)
171{
172 struct i915_hotplug *hpd = &dev_priv->hotplug;
173
174 if (HAS_GMCH(dev_priv)) {
175 if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
176 IS_CHERRYVIEW(dev_priv))
177 hpd->hpd = hpd_status_g4x;
178 else
179 hpd->hpd = hpd_status_i915;
180 return;
181 }
182
183 if (INTEL_GEN(dev_priv) >= 12)
184 hpd->hpd = hpd_gen12;
185 else if (INTEL_GEN(dev_priv) >= 11)
186 hpd->hpd = hpd_gen11;
187 else if (IS_GEN9_LP(dev_priv))
188 hpd->hpd = hpd_bxt;
189 else if (INTEL_GEN(dev_priv) >= 8)
190 hpd->hpd = hpd_bdw;
191 else if (INTEL_GEN(dev_priv) >= 7)
192 hpd->hpd = hpd_ivb;
193 else
194 hpd->hpd = hpd_ilk;
195
196 if (!HAS_PCH_SPLIT(dev_priv) || HAS_PCH_NOP(dev_priv))
197 return;
198
199 if (HAS_PCH_TGP(dev_priv) || HAS_PCH_JSP(dev_priv))
200 hpd->pch_hpd = hpd_tgp;
201 else if (HAS_PCH_ICP(dev_priv) || HAS_PCH_MCC(dev_priv))
202 hpd->pch_hpd = hpd_icp;
203 else if (HAS_PCH_CNP(dev_priv) || HAS_PCH_SPT(dev_priv))
204 hpd->pch_hpd = hpd_spt;
205 else if (HAS_PCH_LPT(dev_priv) || HAS_PCH_CPT(dev_priv))
206 hpd->pch_hpd = hpd_cpt;
207 else if (HAS_PCH_IBX(dev_priv))
208 hpd->pch_hpd = hpd_ibx;
209 else
210 MISSING_CASE(INTEL_PCH_TYPE(dev_priv));
211}
212
213static void
214intel_handle_vblank(struct drm_i915_private *dev_priv, enum pipe pipe)
215{
216 struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
217
218 drm_crtc_handle_vblank(&crtc->base);
219}
220
221void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr,
222 i915_reg_t iir, i915_reg_t ier)
223{
224 intel_uncore_write(uncore, imr, 0xffffffff);
225 intel_uncore_posting_read(uncore, imr);
226
227 intel_uncore_write(uncore, ier, 0);
228
229 /* IIR can theoretically queue up two events. Be paranoid. */
230 intel_uncore_write(uncore, iir, 0xffffffff);
231 intel_uncore_posting_read(uncore, iir);
232 intel_uncore_write(uncore, iir, 0xffffffff);
233 intel_uncore_posting_read(uncore, iir);
234}
235
236void gen2_irq_reset(struct intel_uncore *uncore)
237{
238 intel_uncore_write16(uncore, GEN2_IMR, 0xffff);
239 intel_uncore_posting_read16(uncore, GEN2_IMR);
240
241 intel_uncore_write16(uncore, GEN2_IER, 0);
242
243 /* IIR can theoretically queue up two events. Be paranoid. */
244 intel_uncore_write16(uncore, GEN2_IIR, 0xffff);
245 intel_uncore_posting_read16(uncore, GEN2_IIR);
246 intel_uncore_write16(uncore, GEN2_IIR, 0xffff);
247 intel_uncore_posting_read16(uncore, GEN2_IIR);
248}
249
250/*
251 * We should clear IMR at preinstall/uninstall, and just check at postinstall.
252 */
253static void gen3_assert_iir_is_zero(struct intel_uncore *uncore, i915_reg_t reg)
254{
255 u32 val = intel_uncore_read(uncore, reg);
256
257 if (val == 0)
258 return;
259
260 drm_WARN(&uncore->i915->drm, 1,
261 "Interrupt register 0x%x is not zero: 0x%08x\n",
262 i915_mmio_reg_offset(reg), val);
263 intel_uncore_write(uncore, reg, 0xffffffff);
264 intel_uncore_posting_read(uncore, reg);
265 intel_uncore_write(uncore, reg, 0xffffffff);
266 intel_uncore_posting_read(uncore, reg);
267}
268
269static void gen2_assert_iir_is_zero(struct intel_uncore *uncore)
270{
271 u16 val = intel_uncore_read16(uncore, GEN2_IIR);
272
273 if (val == 0)
274 return;
275
276 drm_WARN(&uncore->i915->drm, 1,
277 "Interrupt register 0x%x is not zero: 0x%08x\n",
278 i915_mmio_reg_offset(GEN2_IIR), val);
279 intel_uncore_write16(uncore, GEN2_IIR, 0xffff);
280 intel_uncore_posting_read16(uncore, GEN2_IIR);
281 intel_uncore_write16(uncore, GEN2_IIR, 0xffff);
282 intel_uncore_posting_read16(uncore, GEN2_IIR);
283}
284
285void gen3_irq_init(struct intel_uncore *uncore,
286 i915_reg_t imr, u32 imr_val,
287 i915_reg_t ier, u32 ier_val,
288 i915_reg_t iir)
289{
290 gen3_assert_iir_is_zero(uncore, iir);
291
292 intel_uncore_write(uncore, ier, ier_val);
293 intel_uncore_write(uncore, imr, imr_val);
294 intel_uncore_posting_read(uncore, imr);
295}
296
297void gen2_irq_init(struct intel_uncore *uncore,
298 u32 imr_val, u32 ier_val)
299{
300 gen2_assert_iir_is_zero(uncore);
301
302 intel_uncore_write16(uncore, GEN2_IER, ier_val);
303 intel_uncore_write16(uncore, GEN2_IMR, imr_val);
304 intel_uncore_posting_read16(uncore, GEN2_IMR);
305}
306
307/* For display hotplug interrupt */
308static inline void
309i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv,
310 u32 mask,
311 u32 bits)
312{
313 u32 val;
314
315 lockdep_assert_held(&dev_priv->irq_lock);
316 drm_WARN_ON(&dev_priv->drm, bits & ~mask);
317
318 val = I915_READ(PORT_HOTPLUG_EN);
319 val &= ~mask;
320 val |= bits;
321 I915_WRITE(PORT_HOTPLUG_EN, val);
322}
323
324/**
325 * i915_hotplug_interrupt_update - update hotplug interrupt enable
326 * @dev_priv: driver private
327 * @mask: bits to update
328 * @bits: bits to enable
329 * NOTE: the HPD enable bits are modified both inside and outside
330 * of an interrupt context. To avoid that read-modify-write cycles
331 * interfer, these bits are protected by a spinlock. Since this
332 * function is usually not called from a context where the lock is
333 * held already, this function acquires the lock itself. A non-locking
334 * version is also available.
335 */
336void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv,
337 u32 mask,
338 u32 bits)
339{
340 spin_lock_irq(&dev_priv->irq_lock);
341 i915_hotplug_interrupt_update_locked(dev_priv, mask, bits);
342 spin_unlock_irq(&dev_priv->irq_lock);
343}
344
345/**
346 * ilk_update_display_irq - update DEIMR
347 * @dev_priv: driver private
348 * @interrupt_mask: mask of interrupt bits to update
349 * @enabled_irq_mask: mask of interrupt bits to enable
350 */
351void ilk_update_display_irq(struct drm_i915_private *dev_priv,
352 u32 interrupt_mask,
353 u32 enabled_irq_mask)
354{
355 u32 new_val;
356
357 lockdep_assert_held(&dev_priv->irq_lock);
358
359 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);
360
361 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
362 return;
363
364 new_val = dev_priv->irq_mask;
365 new_val &= ~interrupt_mask;
366 new_val |= (~enabled_irq_mask & interrupt_mask);
367
368 if (new_val != dev_priv->irq_mask) {
369 dev_priv->irq_mask = new_val;
370 I915_WRITE(DEIMR, dev_priv->irq_mask);
371 POSTING_READ(DEIMR);
372 }
373}
374
375/**
376 * bdw_update_port_irq - update DE port interrupt
377 * @dev_priv: driver private
378 * @interrupt_mask: mask of interrupt bits to update
379 * @enabled_irq_mask: mask of interrupt bits to enable
380 */
381static void bdw_update_port_irq(struct drm_i915_private *dev_priv,
382 u32 interrupt_mask,
383 u32 enabled_irq_mask)
384{
385 u32 new_val;
386 u32 old_val;
387
388 lockdep_assert_held(&dev_priv->irq_lock);
389
390 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);
391
392 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
393 return;
394
395 old_val = I915_READ(GEN8_DE_PORT_IMR);
396
397 new_val = old_val;
398 new_val &= ~interrupt_mask;
399 new_val |= (~enabled_irq_mask & interrupt_mask);
400
401 if (new_val != old_val) {
402 I915_WRITE(GEN8_DE_PORT_IMR, new_val);
403 POSTING_READ(GEN8_DE_PORT_IMR);
404 }
405}
406
407/**
408 * bdw_update_pipe_irq - update DE pipe interrupt
409 * @dev_priv: driver private
410 * @pipe: pipe whose interrupt to update
411 * @interrupt_mask: mask of interrupt bits to update
412 * @enabled_irq_mask: mask of interrupt bits to enable
413 */
414void bdw_update_pipe_irq(struct drm_i915_private *dev_priv,
415 enum pipe pipe,
416 u32 interrupt_mask,
417 u32 enabled_irq_mask)
418{
419 u32 new_val;
420
421 lockdep_assert_held(&dev_priv->irq_lock);
422
423 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);
424
425 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
426 return;
427
428 new_val = dev_priv->de_irq_mask[pipe];
429 new_val &= ~interrupt_mask;
430 new_val |= (~enabled_irq_mask & interrupt_mask);
431
432 if (new_val != dev_priv->de_irq_mask[pipe]) {
433 dev_priv->de_irq_mask[pipe] = new_val;
434 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
435 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
436 }
437}
438
439/**
440 * ibx_display_interrupt_update - update SDEIMR
441 * @dev_priv: driver private
442 * @interrupt_mask: mask of interrupt bits to update
443 * @enabled_irq_mask: mask of interrupt bits to enable
444 */
445void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
446 u32 interrupt_mask,
447 u32 enabled_irq_mask)
448{
449 u32 sdeimr = I915_READ(SDEIMR);
450 sdeimr &= ~interrupt_mask;
451 sdeimr |= (~enabled_irq_mask & interrupt_mask);
452
453 drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);
454
455 lockdep_assert_held(&dev_priv->irq_lock);
456
457 if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
458 return;
459
460 I915_WRITE(SDEIMR, sdeimr);
461 POSTING_READ(SDEIMR);
462}
463
464u32 i915_pipestat_enable_mask(struct drm_i915_private *dev_priv,
465 enum pipe pipe)
466{
467 u32 status_mask = dev_priv->pipestat_irq_mask[pipe];
468 u32 enable_mask = status_mask << 16;
469
470 lockdep_assert_held(&dev_priv->irq_lock);
471
472 if (INTEL_GEN(dev_priv) < 5)
473 goto out;
474
475 /*
476 * On pipe A we don't support the PSR interrupt yet,
477 * on pipe B and C the same bit MBZ.
478 */
479 if (drm_WARN_ON_ONCE(&dev_priv->drm,
480 status_mask & PIPE_A_PSR_STATUS_VLV))
481 return 0;
482 /*
483 * On pipe B and C we don't support the PSR interrupt yet, on pipe
484 * A the same bit is for perf counters which we don't use either.
485 */
486 if (drm_WARN_ON_ONCE(&dev_priv->drm,
487 status_mask & PIPE_B_PSR_STATUS_VLV))
488 return 0;
489
490 enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
491 SPRITE0_FLIP_DONE_INT_EN_VLV |
492 SPRITE1_FLIP_DONE_INT_EN_VLV);
493 if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
494 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
495 if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
496 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
497
498out:
499 drm_WARN_ONCE(&dev_priv->drm,
500 enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
501 status_mask & ~PIPESTAT_INT_STATUS_MASK,
502 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
503 pipe_name(pipe), enable_mask, status_mask);
504
505 return enable_mask;
506}
507
508void i915_enable_pipestat(struct drm_i915_private *dev_priv,
509 enum pipe pipe, u32 status_mask)
510{
511 i915_reg_t reg = PIPESTAT(pipe);
512 u32 enable_mask;
513
514 drm_WARN_ONCE(&dev_priv->drm, status_mask & ~PIPESTAT_INT_STATUS_MASK,
515 "pipe %c: status_mask=0x%x\n",
516 pipe_name(pipe), status_mask);
517
518 lockdep_assert_held(&dev_priv->irq_lock);
519 drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv));
520
521 if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == status_mask)
522 return;
523
524 dev_priv->pipestat_irq_mask[pipe] |= status_mask;
525 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
526
527 I915_WRITE(reg, enable_mask | status_mask);
528 POSTING_READ(reg);
529}
530
531void i915_disable_pipestat(struct drm_i915_private *dev_priv,
532 enum pipe pipe, u32 status_mask)
533{
534 i915_reg_t reg = PIPESTAT(pipe);
535 u32 enable_mask;
536
537 drm_WARN_ONCE(&dev_priv->drm, status_mask & ~PIPESTAT_INT_STATUS_MASK,
538 "pipe %c: status_mask=0x%x\n",
539 pipe_name(pipe), status_mask);
540
541 lockdep_assert_held(&dev_priv->irq_lock);
542 drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv));
543
544 if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == 0)
545 return;
546
547 dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
548 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
549
550 I915_WRITE(reg, enable_mask | status_mask);
551 POSTING_READ(reg);
552}
553
554static bool i915_has_asle(struct drm_i915_private *dev_priv)
555{
556 if (!dev_priv->opregion.asle)
557 return false;
558
559 return IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv);
560}
561
562/**
563 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
564 * @dev_priv: i915 device private
565 */
566static void i915_enable_asle_pipestat(struct drm_i915_private *dev_priv)
567{
568 if (!i915_has_asle(dev_priv))
569 return;
570
571 spin_lock_irq(&dev_priv->irq_lock);
572
573 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
574 if (INTEL_GEN(dev_priv) >= 4)
575 i915_enable_pipestat(dev_priv, PIPE_A,
576 PIPE_LEGACY_BLC_EVENT_STATUS);
577
578 spin_unlock_irq(&dev_priv->irq_lock);
579}
580
581/*
582 * This timing diagram depicts the video signal in and
583 * around the vertical blanking period.
584 *
585 * Assumptions about the fictitious mode used in this example:
586 * vblank_start >= 3
587 * vsync_start = vblank_start + 1
588 * vsync_end = vblank_start + 2
589 * vtotal = vblank_start + 3
590 *
591 * start of vblank:
592 * latch double buffered registers
593 * increment frame counter (ctg+)
594 * generate start of vblank interrupt (gen4+)
595 * |
596 * | frame start:
597 * | generate frame start interrupt (aka. vblank interrupt) (gmch)
598 * | may be shifted forward 1-3 extra lines via PIPECONF
599 * | |
600 * | | start of vsync:
601 * | | generate vsync interrupt
602 * | | |
603 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
604 * . \hs/ . \hs/ \hs/ \hs/ . \hs/
605 * ----va---> <-----------------vb--------------------> <--------va-------------
606 * | | <----vs-----> |
607 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
608 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
609 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
610 * | | |
611 * last visible pixel first visible pixel
612 * | increment frame counter (gen3/4)
613 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
614 *
615 * x = horizontal active
616 * _ = horizontal blanking
617 * hs = horizontal sync
618 * va = vertical active
619 * vb = vertical blanking
620 * vs = vertical sync
621 * vbs = vblank_start (number)
622 *
623 * Summary:
624 * - most events happen at the start of horizontal sync
625 * - frame start happens at the start of horizontal blank, 1-4 lines
626 * (depending on PIPECONF settings) after the start of vblank
627 * - gen3/4 pixel and frame counter are synchronized with the start
628 * of horizontal active on the first line of vertical active
629 */
630
631/* Called from drm generic code, passed a 'crtc', which
632 * we use as a pipe index
633 */
634u32 i915_get_vblank_counter(struct drm_crtc *crtc)
635{
636 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
637 struct drm_vblank_crtc *vblank = &dev_priv->drm.vblank[drm_crtc_index(crtc)];
638 const struct drm_display_mode *mode = &vblank->hwmode;
639 enum pipe pipe = to_intel_crtc(crtc)->pipe;
640 i915_reg_t high_frame, low_frame;
641 u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal;
642 unsigned long irqflags;
643
644 /*
645 * On i965gm TV output the frame counter only works up to
646 * the point when we enable the TV encoder. After that the
647 * frame counter ceases to work and reads zero. We need a
648 * vblank wait before enabling the TV encoder and so we
649 * have to enable vblank interrupts while the frame counter
650 * is still in a working state. However the core vblank code
651 * does not like us returning non-zero frame counter values
652 * when we've told it that we don't have a working frame
653 * counter. Thus we must stop non-zero values leaking out.
654 */
655 if (!vblank->max_vblank_count)
656 return 0;
657
658 htotal = mode->crtc_htotal;
659 hsync_start = mode->crtc_hsync_start;
660 vbl_start = mode->crtc_vblank_start;
661 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
662 vbl_start = DIV_ROUND_UP(vbl_start, 2);
663
664 /* Convert to pixel count */
665 vbl_start *= htotal;
666
667 /* Start of vblank event occurs at start of hsync */
668 vbl_start -= htotal - hsync_start;
669
670 high_frame = PIPEFRAME(pipe);
671 low_frame = PIPEFRAMEPIXEL(pipe);
672
673 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
674
675 /*
676 * High & low register fields aren't synchronized, so make sure
677 * we get a low value that's stable across two reads of the high
678 * register.
679 */
680 do {
681 high1 = intel_de_read_fw(dev_priv, high_frame) & PIPE_FRAME_HIGH_MASK;
682 low = intel_de_read_fw(dev_priv, low_frame);
683 high2 = intel_de_read_fw(dev_priv, high_frame) & PIPE_FRAME_HIGH_MASK;
684 } while (high1 != high2);
685
686 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
687
688 high1 >>= PIPE_FRAME_HIGH_SHIFT;
689 pixel = low & PIPE_PIXEL_MASK;
690 low >>= PIPE_FRAME_LOW_SHIFT;
691
692 /*
693 * The frame counter increments at beginning of active.
694 * Cook up a vblank counter by also checking the pixel
695 * counter against vblank start.
696 */
697 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
698}
699
700u32 g4x_get_vblank_counter(struct drm_crtc *crtc)
701{
702 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
703 enum pipe pipe = to_intel_crtc(crtc)->pipe;
704
705 return I915_READ(PIPE_FRMCOUNT_G4X(pipe));
706}
707
708/*
709 * On certain encoders on certain platforms, pipe
710 * scanline register will not work to get the scanline,
711 * since the timings are driven from the PORT or issues
712 * with scanline register updates.
713 * This function will use Framestamp and current
714 * timestamp registers to calculate the scanline.
715 */
716static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc)
717{
718 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
719 struct drm_vblank_crtc *vblank =
720 &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)];
721 const struct drm_display_mode *mode = &vblank->hwmode;
722 u32 vblank_start = mode->crtc_vblank_start;
723 u32 vtotal = mode->crtc_vtotal;
724 u32 htotal = mode->crtc_htotal;
725 u32 clock = mode->crtc_clock;
726 u32 scanline, scan_prev_time, scan_curr_time, scan_post_time;
727
728 /*
729 * To avoid the race condition where we might cross into the
730 * next vblank just between the PIPE_FRMTMSTMP and TIMESTAMP_CTR
731 * reads. We make sure we read PIPE_FRMTMSTMP and TIMESTAMP_CTR
732 * during the same frame.
733 */
734 do {
735 /*
736 * This field provides read back of the display
737 * pipe frame time stamp. The time stamp value
738 * is sampled at every start of vertical blank.
739 */
740 scan_prev_time = intel_de_read_fw(dev_priv,
741 PIPE_FRMTMSTMP(crtc->pipe));
742
743 /*
744 * The TIMESTAMP_CTR register has the current
745 * time stamp value.
746 */
747 scan_curr_time = intel_de_read_fw(dev_priv, IVB_TIMESTAMP_CTR);
748
749 scan_post_time = intel_de_read_fw(dev_priv,
750 PIPE_FRMTMSTMP(crtc->pipe));
751 } while (scan_post_time != scan_prev_time);
752
753 scanline = div_u64(mul_u32_u32(scan_curr_time - scan_prev_time,
754 clock), 1000 * htotal);
755 scanline = min(scanline, vtotal - 1);
756 scanline = (scanline + vblank_start) % vtotal;
757
758 return scanline;
759}
760
761/*
762 * intel_de_read_fw(), only for fast reads of display block, no need for
763 * forcewake etc.
764 */
765static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
766{
767 struct drm_device *dev = crtc->base.dev;
768 struct drm_i915_private *dev_priv = to_i915(dev);
769 const struct drm_display_mode *mode;
770 struct drm_vblank_crtc *vblank;
771 enum pipe pipe = crtc->pipe;
772 int position, vtotal;
773
774 if (!crtc->active)
775 return -1;
776
777 vblank = &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)];
778 mode = &vblank->hwmode;
779
780 if (crtc->mode_flags & I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP)
781 return __intel_get_crtc_scanline_from_timestamp(crtc);
782
783 vtotal = mode->crtc_vtotal;
784 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
785 vtotal /= 2;
786
787 if (IS_GEN(dev_priv, 2))
788 position = intel_de_read_fw(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
789 else
790 position = intel_de_read_fw(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
791
792 /*
793 * On HSW, the DSL reg (0x70000) appears to return 0 if we
794 * read it just before the start of vblank. So try it again
795 * so we don't accidentally end up spanning a vblank frame
796 * increment, causing the pipe_update_end() code to squak at us.
797 *
798 * The nature of this problem means we can't simply check the ISR
799 * bit and return the vblank start value; nor can we use the scanline
800 * debug register in the transcoder as it appears to have the same
801 * problem. We may need to extend this to include other platforms,
802 * but so far testing only shows the problem on HSW.
803 */
804 if (HAS_DDI(dev_priv) && !position) {
805 int i, temp;
806
807 for (i = 0; i < 100; i++) {
808 udelay(1);
809 temp = intel_de_read_fw(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
810 if (temp != position) {
811 position = temp;
812 break;
813 }
814 }
815 }
816
817 /*
818 * See update_scanline_offset() for the details on the
819 * scanline_offset adjustment.
820 */
821 return (position + crtc->scanline_offset) % vtotal;
822}
823
824static bool i915_get_crtc_scanoutpos(struct drm_crtc *_crtc,
825 bool in_vblank_irq,
826 int *vpos, int *hpos,
827 ktime_t *stime, ktime_t *etime,
828 const struct drm_display_mode *mode)
829{
830 struct drm_device *dev = _crtc->dev;
831 struct drm_i915_private *dev_priv = to_i915(dev);
832 struct intel_crtc *crtc = to_intel_crtc(_crtc);
833 enum pipe pipe = crtc->pipe;
834 int position;
835 int vbl_start, vbl_end, hsync_start, htotal, vtotal;
836 unsigned long irqflags;
837 bool use_scanline_counter = INTEL_GEN(dev_priv) >= 5 ||
838 IS_G4X(dev_priv) || IS_GEN(dev_priv, 2) ||
839 crtc->mode_flags & I915_MODE_FLAG_USE_SCANLINE_COUNTER;
840
841 if (drm_WARN_ON(&dev_priv->drm, !mode->crtc_clock)) {
842 drm_dbg(&dev_priv->drm,
843 "trying to get scanoutpos for disabled "
844 "pipe %c\n", pipe_name(pipe));
845 return false;
846 }
847
848 htotal = mode->crtc_htotal;
849 hsync_start = mode->crtc_hsync_start;
850 vtotal = mode->crtc_vtotal;
851 vbl_start = mode->crtc_vblank_start;
852 vbl_end = mode->crtc_vblank_end;
853
854 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
855 vbl_start = DIV_ROUND_UP(vbl_start, 2);
856 vbl_end /= 2;
857 vtotal /= 2;
858 }
859
860 /*
861 * Lock uncore.lock, as we will do multiple timing critical raw
862 * register reads, potentially with preemption disabled, so the
863 * following code must not block on uncore.lock.
864 */
865 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
866
867 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
868
869 /* Get optional system timestamp before query. */
870 if (stime)
871 *stime = ktime_get();
872
873 if (use_scanline_counter) {
874 /* No obvious pixelcount register. Only query vertical
875 * scanout position from Display scan line register.
876 */
877 position = __intel_get_crtc_scanline(crtc);
878 } else {
879 /* Have access to pixelcount since start of frame.
880 * We can split this into vertical and horizontal
881 * scanout position.
882 */
883 position = (intel_de_read_fw(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
884
885 /* convert to pixel counts */
886 vbl_start *= htotal;
887 vbl_end *= htotal;
888 vtotal *= htotal;
889
890 /*
891 * In interlaced modes, the pixel counter counts all pixels,
892 * so one field will have htotal more pixels. In order to avoid
893 * the reported position from jumping backwards when the pixel
894 * counter is beyond the length of the shorter field, just
895 * clamp the position the length of the shorter field. This
896 * matches how the scanline counter based position works since
897 * the scanline counter doesn't count the two half lines.
898 */
899 if (position >= vtotal)
900 position = vtotal - 1;
901
902 /*
903 * Start of vblank interrupt is triggered at start of hsync,
904 * just prior to the first active line of vblank. However we
905 * consider lines to start at the leading edge of horizontal
906 * active. So, should we get here before we've crossed into
907 * the horizontal active of the first line in vblank, we would
908 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
909 * always add htotal-hsync_start to the current pixel position.
910 */
911 position = (position + htotal - hsync_start) % vtotal;
912 }
913
914 /* Get optional system timestamp after query. */
915 if (etime)
916 *etime = ktime_get();
917
918 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
919
920 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
921
922 /*
923 * While in vblank, position will be negative
924 * counting up towards 0 at vbl_end. And outside
925 * vblank, position will be positive counting
926 * up since vbl_end.
927 */
928 if (position >= vbl_start)
929 position -= vbl_end;
930 else
931 position += vtotal - vbl_end;
932
933 if (use_scanline_counter) {
934 *vpos = position;
935 *hpos = 0;
936 } else {
937 *vpos = position / htotal;
938 *hpos = position - (*vpos * htotal);
939 }
940
941 return true;
942}
943
944bool intel_crtc_get_vblank_timestamp(struct drm_crtc *crtc, int *max_error,
945 ktime_t *vblank_time, bool in_vblank_irq)
946{
947 return drm_crtc_vblank_helper_get_vblank_timestamp_internal(
948 crtc, max_error, vblank_time, in_vblank_irq,
949 i915_get_crtc_scanoutpos);
950}
951
952int intel_get_crtc_scanline(struct intel_crtc *crtc)
953{
954 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
955 unsigned long irqflags;
956 int position;
957
958 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
959 position = __intel_get_crtc_scanline(crtc);
960 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
961
962 return position;
963}
964
965/**
966 * ivb_parity_work - Workqueue called when a parity error interrupt
967 * occurred.
968 * @work: workqueue struct
969 *
970 * Doesn't actually do anything except notify userspace. As a consequence of
971 * this event, userspace should try to remap the bad rows since statistically
972 * it is likely the same row is more likely to go bad again.
973 */
974static void ivb_parity_work(struct work_struct *work)
975{
976 struct drm_i915_private *dev_priv =
977 container_of(work, typeof(*dev_priv), l3_parity.error_work);
978 struct intel_gt *gt = &dev_priv->gt;
979 u32 error_status, row, bank, subbank;
980 char *parity_event[6];
981 u32 misccpctl;
982 u8 slice = 0;
983
984 /* We must turn off DOP level clock gating to access the L3 registers.
985 * In order to prevent a get/put style interface, acquire struct mutex
986 * any time we access those registers.
987 */
988 mutex_lock(&dev_priv->drm.struct_mutex);
989
990 /* If we've screwed up tracking, just let the interrupt fire again */
991 if (drm_WARN_ON(&dev_priv->drm, !dev_priv->l3_parity.which_slice))
992 goto out;
993
994 misccpctl = I915_READ(GEN7_MISCCPCTL);
995 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
996 POSTING_READ(GEN7_MISCCPCTL);
997
998 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
999 i915_reg_t reg;
1000
1001 slice--;
1002 if (drm_WARN_ON_ONCE(&dev_priv->drm,
1003 slice >= NUM_L3_SLICES(dev_priv)))
1004 break;
1005
1006 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1007
1008 reg = GEN7_L3CDERRST1(slice);
1009
1010 error_status = I915_READ(reg);
1011 row = GEN7_PARITY_ERROR_ROW(error_status);
1012 bank = GEN7_PARITY_ERROR_BANK(error_status);
1013 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1014
1015 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1016 POSTING_READ(reg);
1017
1018 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1019 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
1020 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
1021 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
1022 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
1023 parity_event[5] = NULL;
1024
1025 kobject_uevent_env(&dev_priv->drm.primary->kdev->kobj,
1026 KOBJ_CHANGE, parity_event);
1027
1028 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1029 slice, row, bank, subbank);
1030
1031 kfree(parity_event[4]);
1032 kfree(parity_event[3]);
1033 kfree(parity_event[2]);
1034 kfree(parity_event[1]);
1035 }
1036
1037 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1038
1039out:
1040 drm_WARN_ON(&dev_priv->drm, dev_priv->l3_parity.which_slice);
1041 spin_lock_irq(>->irq_lock);
1042 gen5_gt_enable_irq(gt, GT_PARITY_ERROR(dev_priv));
1043 spin_unlock_irq(>->irq_lock);
1044
1045 mutex_unlock(&dev_priv->drm.struct_mutex);
1046}
1047
1048static bool gen11_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1049{
1050 switch (pin) {
1051 case HPD_PORT_C:
1052 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC1);
1053 case HPD_PORT_D:
1054 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC2);
1055 case HPD_PORT_E:
1056 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC3);
1057 case HPD_PORT_F:
1058 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC4);
1059 default:
1060 return false;
1061 }
1062}
1063
1064static bool gen12_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1065{
1066 switch (pin) {
1067 case HPD_PORT_D:
1068 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC1);
1069 case HPD_PORT_E:
1070 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC2);
1071 case HPD_PORT_F:
1072 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC3);
1073 case HPD_PORT_G:
1074 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC4);
1075 case HPD_PORT_H:
1076 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC5);
1077 case HPD_PORT_I:
1078 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC6);
1079 default:
1080 return false;
1081 }
1082}
1083
1084static bool bxt_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1085{
1086 switch (pin) {
1087 case HPD_PORT_A:
1088 return val & PORTA_HOTPLUG_LONG_DETECT;
1089 case HPD_PORT_B:
1090 return val & PORTB_HOTPLUG_LONG_DETECT;
1091 case HPD_PORT_C:
1092 return val & PORTC_HOTPLUG_LONG_DETECT;
1093 default:
1094 return false;
1095 }
1096}
1097
1098static bool icp_ddi_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1099{
1100 switch (pin) {
1101 case HPD_PORT_A:
1102 return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_A);
1103 case HPD_PORT_B:
1104 return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_B);
1105 case HPD_PORT_C:
1106 return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_C);
1107 default:
1108 return false;
1109 }
1110}
1111
1112static bool icp_tc_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1113{
1114 switch (pin) {
1115 case HPD_PORT_C:
1116 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC1);
1117 case HPD_PORT_D:
1118 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC2);
1119 case HPD_PORT_E:
1120 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC3);
1121 case HPD_PORT_F:
1122 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC4);
1123 default:
1124 return false;
1125 }
1126}
1127
1128static bool tgp_tc_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1129{
1130 switch (pin) {
1131 case HPD_PORT_D:
1132 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC1);
1133 case HPD_PORT_E:
1134 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC2);
1135 case HPD_PORT_F:
1136 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC3);
1137 case HPD_PORT_G:
1138 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC4);
1139 case HPD_PORT_H:
1140 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC5);
1141 case HPD_PORT_I:
1142 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC6);
1143 default:
1144 return false;
1145 }
1146}
1147
1148static bool spt_port_hotplug2_long_detect(enum hpd_pin pin, u32 val)
1149{
1150 switch (pin) {
1151 case HPD_PORT_E:
1152 return val & PORTE_HOTPLUG_LONG_DETECT;
1153 default:
1154 return false;
1155 }
1156}
1157
1158static bool spt_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1159{
1160 switch (pin) {
1161 case HPD_PORT_A:
1162 return val & PORTA_HOTPLUG_LONG_DETECT;
1163 case HPD_PORT_B:
1164 return val & PORTB_HOTPLUG_LONG_DETECT;
1165 case HPD_PORT_C:
1166 return val & PORTC_HOTPLUG_LONG_DETECT;
1167 case HPD_PORT_D:
1168 return val & PORTD_HOTPLUG_LONG_DETECT;
1169 default:
1170 return false;
1171 }
1172}
1173
1174static bool ilk_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1175{
1176 switch (pin) {
1177 case HPD_PORT_A:
1178 return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT;
1179 default:
1180 return false;
1181 }
1182}
1183
1184static bool pch_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1185{
1186 switch (pin) {
1187 case HPD_PORT_B:
1188 return val & PORTB_HOTPLUG_LONG_DETECT;
1189 case HPD_PORT_C:
1190 return val & PORTC_HOTPLUG_LONG_DETECT;
1191 case HPD_PORT_D:
1192 return val & PORTD_HOTPLUG_LONG_DETECT;
1193 default:
1194 return false;
1195 }
1196}
1197
1198static bool i9xx_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1199{
1200 switch (pin) {
1201 case HPD_PORT_B:
1202 return val & PORTB_HOTPLUG_INT_LONG_PULSE;
1203 case HPD_PORT_C:
1204 return val & PORTC_HOTPLUG_INT_LONG_PULSE;
1205 case HPD_PORT_D:
1206 return val & PORTD_HOTPLUG_INT_LONG_PULSE;
1207 default:
1208 return false;
1209 }
1210}
1211
1212/*
1213 * Get a bit mask of pins that have triggered, and which ones may be long.
1214 * This can be called multiple times with the same masks to accumulate
1215 * hotplug detection results from several registers.
1216 *
1217 * Note that the caller is expected to zero out the masks initially.
1218 */
1219static void intel_get_hpd_pins(struct drm_i915_private *dev_priv,
1220 u32 *pin_mask, u32 *long_mask,
1221 u32 hotplug_trigger, u32 dig_hotplug_reg,
1222 const u32 hpd[HPD_NUM_PINS],
1223 bool long_pulse_detect(enum hpd_pin pin, u32 val))
1224{
1225 enum hpd_pin pin;
1226
1227 BUILD_BUG_ON(BITS_PER_TYPE(*pin_mask) < HPD_NUM_PINS);
1228
1229 for_each_hpd_pin(pin) {
1230 if ((hpd[pin] & hotplug_trigger) == 0)
1231 continue;
1232
1233 *pin_mask |= BIT(pin);
1234
1235 if (long_pulse_detect(pin, dig_hotplug_reg))
1236 *long_mask |= BIT(pin);
1237 }
1238
1239 drm_dbg(&dev_priv->drm,
1240 "hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x, long 0x%08x\n",
1241 hotplug_trigger, dig_hotplug_reg, *pin_mask, *long_mask);
1242
1243}
1244
1245static void gmbus_irq_handler(struct drm_i915_private *dev_priv)
1246{
1247 wake_up_all(&dev_priv->gmbus_wait_queue);
1248}
1249
1250static void dp_aux_irq_handler(struct drm_i915_private *dev_priv)
1251{
1252 wake_up_all(&dev_priv->gmbus_wait_queue);
1253}
1254
1255#if defined(CONFIG_DEBUG_FS)
1256static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1257 enum pipe pipe,
1258 u32 crc0, u32 crc1,
1259 u32 crc2, u32 crc3,
1260 u32 crc4)
1261{
1262 struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
1263 struct intel_pipe_crc *pipe_crc = &crtc->pipe_crc;
1264 u32 crcs[5] = { crc0, crc1, crc2, crc3, crc4 };
1265
1266 trace_intel_pipe_crc(crtc, crcs);
1267
1268 spin_lock(&pipe_crc->lock);
1269 /*
1270 * For some not yet identified reason, the first CRC is
1271 * bonkers. So let's just wait for the next vblank and read
1272 * out the buggy result.
1273 *
1274 * On GEN8+ sometimes the second CRC is bonkers as well, so
1275 * don't trust that one either.
1276 */
1277 if (pipe_crc->skipped <= 0 ||
1278 (INTEL_GEN(dev_priv) >= 8 && pipe_crc->skipped == 1)) {
1279 pipe_crc->skipped++;
1280 spin_unlock(&pipe_crc->lock);
1281 return;
1282 }
1283 spin_unlock(&pipe_crc->lock);
1284
1285 drm_crtc_add_crc_entry(&crtc->base, true,
1286 drm_crtc_accurate_vblank_count(&crtc->base),
1287 crcs);
1288}
1289#else
1290static inline void
1291display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1292 enum pipe pipe,
1293 u32 crc0, u32 crc1,
1294 u32 crc2, u32 crc3,
1295 u32 crc4) {}
1296#endif
1297
1298
1299static void hsw_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1300 enum pipe pipe)
1301{
1302 display_pipe_crc_irq_handler(dev_priv, pipe,
1303 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1304 0, 0, 0, 0);
1305}
1306
1307static void ivb_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1308 enum pipe pipe)
1309{
1310 display_pipe_crc_irq_handler(dev_priv, pipe,
1311 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1312 I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1313 I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1314 I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1315 I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1316}
1317
1318static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1319 enum pipe pipe)
1320{
1321 u32 res1, res2;
1322
1323 if (INTEL_GEN(dev_priv) >= 3)
1324 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1325 else
1326 res1 = 0;
1327
1328 if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
1329 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1330 else
1331 res2 = 0;
1332
1333 display_pipe_crc_irq_handler(dev_priv, pipe,
1334 I915_READ(PIPE_CRC_RES_RED(pipe)),
1335 I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1336 I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1337 res1, res2);
1338}
1339
1340static void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv)
1341{
1342 enum pipe pipe;
1343
1344 for_each_pipe(dev_priv, pipe) {
1345 I915_WRITE(PIPESTAT(pipe),
1346 PIPESTAT_INT_STATUS_MASK |
1347 PIPE_FIFO_UNDERRUN_STATUS);
1348
1349 dev_priv->pipestat_irq_mask[pipe] = 0;
1350 }
1351}
1352
1353static void i9xx_pipestat_irq_ack(struct drm_i915_private *dev_priv,
1354 u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1355{
1356 enum pipe pipe;
1357
1358 spin_lock(&dev_priv->irq_lock);
1359
1360 if (!dev_priv->display_irqs_enabled) {
1361 spin_unlock(&dev_priv->irq_lock);
1362 return;
1363 }
1364
1365 for_each_pipe(dev_priv, pipe) {
1366 i915_reg_t reg;
1367 u32 status_mask, enable_mask, iir_bit = 0;
1368
1369 /*
1370 * PIPESTAT bits get signalled even when the interrupt is
1371 * disabled with the mask bits, and some of the status bits do
1372 * not generate interrupts at all (like the underrun bit). Hence
1373 * we need to be careful that we only handle what we want to
1374 * handle.
1375 */
1376
1377 /* fifo underruns are filterered in the underrun handler. */
1378 status_mask = PIPE_FIFO_UNDERRUN_STATUS;
1379
1380 switch (pipe) {
1381 default:
1382 case PIPE_A:
1383 iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
1384 break;
1385 case PIPE_B:
1386 iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
1387 break;
1388 case PIPE_C:
1389 iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
1390 break;
1391 }
1392 if (iir & iir_bit)
1393 status_mask |= dev_priv->pipestat_irq_mask[pipe];
1394
1395 if (!status_mask)
1396 continue;
1397
1398 reg = PIPESTAT(pipe);
1399 pipe_stats[pipe] = I915_READ(reg) & status_mask;
1400 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
1401
1402 /*
1403 * Clear the PIPE*STAT regs before the IIR
1404 *
1405 * Toggle the enable bits to make sure we get an
1406 * edge in the ISR pipe event bit if we don't clear
1407 * all the enabled status bits. Otherwise the edge
1408 * triggered IIR on i965/g4x wouldn't notice that
1409 * an interrupt is still pending.
1410 */
1411 if (pipe_stats[pipe]) {
1412 I915_WRITE(reg, pipe_stats[pipe]);
1413 I915_WRITE(reg, enable_mask);
1414 }
1415 }
1416 spin_unlock(&dev_priv->irq_lock);
1417}
1418
1419static void i8xx_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1420 u16 iir, u32 pipe_stats[I915_MAX_PIPES])
1421{
1422 enum pipe pipe;
1423
1424 for_each_pipe(dev_priv, pipe) {
1425 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
1426 intel_handle_vblank(dev_priv, pipe);
1427
1428 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1429 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1430
1431 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1432 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1433 }
1434}
1435
1436static void i915_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1437 u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1438{
1439 bool blc_event = false;
1440 enum pipe pipe;
1441
1442 for_each_pipe(dev_priv, pipe) {
1443 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
1444 intel_handle_vblank(dev_priv, pipe);
1445
1446 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
1447 blc_event = true;
1448
1449 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1450 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1451
1452 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1453 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1454 }
1455
1456 if (blc_event || (iir & I915_ASLE_INTERRUPT))
1457 intel_opregion_asle_intr(dev_priv);
1458}
1459
1460static void i965_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1461 u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1462{
1463 bool blc_event = false;
1464 enum pipe pipe;
1465
1466 for_each_pipe(dev_priv, pipe) {
1467 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
1468 intel_handle_vblank(dev_priv, pipe);
1469
1470 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
1471 blc_event = true;
1472
1473 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1474 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1475
1476 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1477 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1478 }
1479
1480 if (blc_event || (iir & I915_ASLE_INTERRUPT))
1481 intel_opregion_asle_intr(dev_priv);
1482
1483 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1484 gmbus_irq_handler(dev_priv);
1485}
1486
1487static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1488 u32 pipe_stats[I915_MAX_PIPES])
1489{
1490 enum pipe pipe;
1491
1492 for_each_pipe(dev_priv, pipe) {
1493 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
1494 intel_handle_vblank(dev_priv, pipe);
1495
1496 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1497 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1498
1499 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1500 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1501 }
1502
1503 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1504 gmbus_irq_handler(dev_priv);
1505}
1506
1507static u32 i9xx_hpd_irq_ack(struct drm_i915_private *dev_priv)
1508{
1509 u32 hotplug_status = 0, hotplug_status_mask;
1510 int i;
1511
1512 if (IS_G4X(dev_priv) ||
1513 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1514 hotplug_status_mask = HOTPLUG_INT_STATUS_G4X |
1515 DP_AUX_CHANNEL_MASK_INT_STATUS_G4X;
1516 else
1517 hotplug_status_mask = HOTPLUG_INT_STATUS_I915;
1518
1519 /*
1520 * We absolutely have to clear all the pending interrupt
1521 * bits in PORT_HOTPLUG_STAT. Otherwise the ISR port
1522 * interrupt bit won't have an edge, and the i965/g4x
1523 * edge triggered IIR will not notice that an interrupt
1524 * is still pending. We can't use PORT_HOTPLUG_EN to
1525 * guarantee the edge as the act of toggling the enable
1526 * bits can itself generate a new hotplug interrupt :(
1527 */
1528 for (i = 0; i < 10; i++) {
1529 u32 tmp = I915_READ(PORT_HOTPLUG_STAT) & hotplug_status_mask;
1530
1531 if (tmp == 0)
1532 return hotplug_status;
1533
1534 hotplug_status |= tmp;
1535 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1536 }
1537
1538 drm_WARN_ONCE(&dev_priv->drm, 1,
1539 "PORT_HOTPLUG_STAT did not clear (0x%08x)\n",
1540 I915_READ(PORT_HOTPLUG_STAT));
1541
1542 return hotplug_status;
1543}
1544
1545static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv,
1546 u32 hotplug_status)
1547{
1548 u32 pin_mask = 0, long_mask = 0;
1549 u32 hotplug_trigger;
1550
1551 if (IS_G4X(dev_priv) ||
1552 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1553 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
1554 else
1555 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1556
1557 if (hotplug_trigger) {
1558 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1559 hotplug_trigger, hotplug_trigger,
1560 dev_priv->hotplug.hpd,
1561 i9xx_port_hotplug_long_detect);
1562
1563 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1564 }
1565
1566 if ((IS_G4X(dev_priv) ||
1567 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
1568 hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
1569 dp_aux_irq_handler(dev_priv);
1570}
1571
1572static irqreturn_t valleyview_irq_handler(int irq, void *arg)
1573{
1574 struct drm_i915_private *dev_priv = arg;
1575 irqreturn_t ret = IRQ_NONE;
1576
1577 if (!intel_irqs_enabled(dev_priv))
1578 return IRQ_NONE;
1579
1580 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
1581 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
1582
1583 do {
1584 u32 iir, gt_iir, pm_iir;
1585 u32 pipe_stats[I915_MAX_PIPES] = {};
1586 u32 hotplug_status = 0;
1587 u32 ier = 0;
1588
1589 gt_iir = I915_READ(GTIIR);
1590 pm_iir = I915_READ(GEN6_PMIIR);
1591 iir = I915_READ(VLV_IIR);
1592
1593 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1594 break;
1595
1596 ret = IRQ_HANDLED;
1597
1598 /*
1599 * Theory on interrupt generation, based on empirical evidence:
1600 *
1601 * x = ((VLV_IIR & VLV_IER) ||
1602 * (((GT_IIR & GT_IER) || (GEN6_PMIIR & GEN6_PMIER)) &&
1603 * (VLV_MASTER_IER & MASTER_INTERRUPT_ENABLE)));
1604 *
1605 * A CPU interrupt will only be raised when 'x' has a 0->1 edge.
1606 * Hence we clear MASTER_INTERRUPT_ENABLE and VLV_IER to
1607 * guarantee the CPU interrupt will be raised again even if we
1608 * don't end up clearing all the VLV_IIR, GT_IIR, GEN6_PMIIR
1609 * bits this time around.
1610 */
1611 I915_WRITE(VLV_MASTER_IER, 0);
1612 ier = I915_READ(VLV_IER);
1613 I915_WRITE(VLV_IER, 0);
1614
1615 if (gt_iir)
1616 I915_WRITE(GTIIR, gt_iir);
1617 if (pm_iir)
1618 I915_WRITE(GEN6_PMIIR, pm_iir);
1619
1620 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1621 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
1622
1623 /* Call regardless, as some status bits might not be
1624 * signalled in iir */
1625 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
1626
1627 if (iir & (I915_LPE_PIPE_A_INTERRUPT |
1628 I915_LPE_PIPE_B_INTERRUPT))
1629 intel_lpe_audio_irq_handler(dev_priv);
1630
1631 /*
1632 * VLV_IIR is single buffered, and reflects the level
1633 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
1634 */
1635 if (iir)
1636 I915_WRITE(VLV_IIR, iir);
1637
1638 I915_WRITE(VLV_IER, ier);
1639 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
1640
1641 if (gt_iir)
1642 gen6_gt_irq_handler(&dev_priv->gt, gt_iir);
1643 if (pm_iir)
1644 gen6_rps_irq_handler(&dev_priv->gt.rps, pm_iir);
1645
1646 if (hotplug_status)
1647 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
1648
1649 valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
1650 } while (0);
1651
1652 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
1653
1654 return ret;
1655}
1656
1657static irqreturn_t cherryview_irq_handler(int irq, void *arg)
1658{
1659 struct drm_i915_private *dev_priv = arg;
1660 irqreturn_t ret = IRQ_NONE;
1661
1662 if (!intel_irqs_enabled(dev_priv))
1663 return IRQ_NONE;
1664
1665 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
1666 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
1667
1668 do {
1669 u32 master_ctl, iir;
1670 u32 pipe_stats[I915_MAX_PIPES] = {};
1671 u32 hotplug_status = 0;
1672 u32 ier = 0;
1673
1674 master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
1675 iir = I915_READ(VLV_IIR);
1676
1677 if (master_ctl == 0 && iir == 0)
1678 break;
1679
1680 ret = IRQ_HANDLED;
1681
1682 /*
1683 * Theory on interrupt generation, based on empirical evidence:
1684 *
1685 * x = ((VLV_IIR & VLV_IER) ||
1686 * ((GEN8_MASTER_IRQ & ~GEN8_MASTER_IRQ_CONTROL) &&
1687 * (GEN8_MASTER_IRQ & GEN8_MASTER_IRQ_CONTROL)));
1688 *
1689 * A CPU interrupt will only be raised when 'x' has a 0->1 edge.
1690 * Hence we clear GEN8_MASTER_IRQ_CONTROL and VLV_IER to
1691 * guarantee the CPU interrupt will be raised again even if we
1692 * don't end up clearing all the VLV_IIR and GEN8_MASTER_IRQ_CONTROL
1693 * bits this time around.
1694 */
1695 I915_WRITE(GEN8_MASTER_IRQ, 0);
1696 ier = I915_READ(VLV_IER);
1697 I915_WRITE(VLV_IER, 0);
1698
1699 gen8_gt_irq_handler(&dev_priv->gt, master_ctl);
1700
1701 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1702 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
1703
1704 /* Call regardless, as some status bits might not be
1705 * signalled in iir */
1706 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
1707
1708 if (iir & (I915_LPE_PIPE_A_INTERRUPT |
1709 I915_LPE_PIPE_B_INTERRUPT |
1710 I915_LPE_PIPE_C_INTERRUPT))
1711 intel_lpe_audio_irq_handler(dev_priv);
1712
1713 /*
1714 * VLV_IIR is single buffered, and reflects the level
1715 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
1716 */
1717 if (iir)
1718 I915_WRITE(VLV_IIR, iir);
1719
1720 I915_WRITE(VLV_IER, ier);
1721 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
1722
1723 if (hotplug_status)
1724 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
1725
1726 valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
1727 } while (0);
1728
1729 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
1730
1731 return ret;
1732}
1733
1734static void ibx_hpd_irq_handler(struct drm_i915_private *dev_priv,
1735 u32 hotplug_trigger)
1736{
1737 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
1738
1739 /*
1740 * Somehow the PCH doesn't seem to really ack the interrupt to the CPU
1741 * unless we touch the hotplug register, even if hotplug_trigger is
1742 * zero. Not acking leads to "The master control interrupt lied (SDE)!"
1743 * errors.
1744 */
1745 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
1746 if (!hotplug_trigger) {
1747 u32 mask = PORTA_HOTPLUG_STATUS_MASK |
1748 PORTD_HOTPLUG_STATUS_MASK |
1749 PORTC_HOTPLUG_STATUS_MASK |
1750 PORTB_HOTPLUG_STATUS_MASK;
1751 dig_hotplug_reg &= ~mask;
1752 }
1753
1754 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
1755 if (!hotplug_trigger)
1756 return;
1757
1758 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1759 hotplug_trigger, dig_hotplug_reg,
1760 dev_priv->hotplug.pch_hpd,
1761 pch_port_hotplug_long_detect);
1762
1763 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1764}
1765
1766static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
1767{
1768 enum pipe pipe;
1769 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1770
1771 ibx_hpd_irq_handler(dev_priv, hotplug_trigger);
1772
1773 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1774 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1775 SDE_AUDIO_POWER_SHIFT);
1776 drm_dbg(&dev_priv->drm, "PCH audio power change on port %d\n",
1777 port_name(port));
1778 }
1779
1780 if (pch_iir & SDE_AUX_MASK)
1781 dp_aux_irq_handler(dev_priv);
1782
1783 if (pch_iir & SDE_GMBUS)
1784 gmbus_irq_handler(dev_priv);
1785
1786 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1787 drm_dbg(&dev_priv->drm, "PCH HDCP audio interrupt\n");
1788
1789 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1790 drm_dbg(&dev_priv->drm, "PCH transcoder audio interrupt\n");
1791
1792 if (pch_iir & SDE_POISON)
1793 drm_err(&dev_priv->drm, "PCH poison interrupt\n");
1794
1795 if (pch_iir & SDE_FDI_MASK) {
1796 for_each_pipe(dev_priv, pipe)
1797 drm_dbg(&dev_priv->drm, " pipe %c FDI IIR: 0x%08x\n",
1798 pipe_name(pipe),
1799 I915_READ(FDI_RX_IIR(pipe)));
1800 }
1801
1802 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1803 drm_dbg(&dev_priv->drm, "PCH transcoder CRC done interrupt\n");
1804
1805 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1806 drm_dbg(&dev_priv->drm,
1807 "PCH transcoder CRC error interrupt\n");
1808
1809 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1810 intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_A);
1811
1812 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1813 intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_B);
1814}
1815
1816static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
1817{
1818 u32 err_int = I915_READ(GEN7_ERR_INT);
1819 enum pipe pipe;
1820
1821 if (err_int & ERR_INT_POISON)
1822 drm_err(&dev_priv->drm, "Poison interrupt\n");
1823
1824 for_each_pipe(dev_priv, pipe) {
1825 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
1826 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1827
1828 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
1829 if (IS_IVYBRIDGE(dev_priv))
1830 ivb_pipe_crc_irq_handler(dev_priv, pipe);
1831 else
1832 hsw_pipe_crc_irq_handler(dev_priv, pipe);
1833 }
1834 }
1835
1836 I915_WRITE(GEN7_ERR_INT, err_int);
1837}
1838
1839static void cpt_serr_int_handler(struct drm_i915_private *dev_priv)
1840{
1841 u32 serr_int = I915_READ(SERR_INT);
1842 enum pipe pipe;
1843
1844 if (serr_int & SERR_INT_POISON)
1845 drm_err(&dev_priv->drm, "PCH poison interrupt\n");
1846
1847 for_each_pipe(dev_priv, pipe)
1848 if (serr_int & SERR_INT_TRANS_FIFO_UNDERRUN(pipe))
1849 intel_pch_fifo_underrun_irq_handler(dev_priv, pipe);
1850
1851 I915_WRITE(SERR_INT, serr_int);
1852}
1853
1854static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
1855{
1856 enum pipe pipe;
1857 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1858
1859 ibx_hpd_irq_handler(dev_priv, hotplug_trigger);
1860
1861 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1862 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1863 SDE_AUDIO_POWER_SHIFT_CPT);
1864 drm_dbg(&dev_priv->drm, "PCH audio power change on port %c\n",
1865 port_name(port));
1866 }
1867
1868 if (pch_iir & SDE_AUX_MASK_CPT)
1869 dp_aux_irq_handler(dev_priv);
1870
1871 if (pch_iir & SDE_GMBUS_CPT)
1872 gmbus_irq_handler(dev_priv);
1873
1874 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1875 drm_dbg(&dev_priv->drm, "Audio CP request interrupt\n");
1876
1877 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1878 drm_dbg(&dev_priv->drm, "Audio CP change interrupt\n");
1879
1880 if (pch_iir & SDE_FDI_MASK_CPT) {
1881 for_each_pipe(dev_priv, pipe)
1882 drm_dbg(&dev_priv->drm, " pipe %c FDI IIR: 0x%08x\n",
1883 pipe_name(pipe),
1884 I915_READ(FDI_RX_IIR(pipe)));
1885 }
1886
1887 if (pch_iir & SDE_ERROR_CPT)
1888 cpt_serr_int_handler(dev_priv);
1889}
1890
1891static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
1892{
1893 u32 ddi_hotplug_trigger, tc_hotplug_trigger;
1894 u32 pin_mask = 0, long_mask = 0;
1895 bool (*tc_port_hotplug_long_detect)(enum hpd_pin pin, u32 val);
1896
1897 if (HAS_PCH_TGP(dev_priv)) {
1898 ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_TGP;
1899 tc_hotplug_trigger = pch_iir & SDE_TC_MASK_TGP;
1900 tc_port_hotplug_long_detect = tgp_tc_port_hotplug_long_detect;
1901 } else if (HAS_PCH_JSP(dev_priv)) {
1902 ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_TGP;
1903 tc_hotplug_trigger = 0;
1904 } else if (HAS_PCH_MCC(dev_priv)) {
1905 ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
1906 tc_hotplug_trigger = pch_iir & SDE_TC_HOTPLUG_ICP(PORT_TC1);
1907 tc_port_hotplug_long_detect = icp_tc_port_hotplug_long_detect;
1908 } else {
1909 drm_WARN(&dev_priv->drm, !HAS_PCH_ICP(dev_priv),
1910 "Unrecognized PCH type 0x%x\n",
1911 INTEL_PCH_TYPE(dev_priv));
1912
1913 ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
1914 tc_hotplug_trigger = pch_iir & SDE_TC_MASK_ICP;
1915 tc_port_hotplug_long_detect = icp_tc_port_hotplug_long_detect;
1916 }
1917
1918 if (ddi_hotplug_trigger) {
1919 u32 dig_hotplug_reg;
1920
1921 dig_hotplug_reg = I915_READ(SHOTPLUG_CTL_DDI);
1922 I915_WRITE(SHOTPLUG_CTL_DDI, dig_hotplug_reg);
1923
1924 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1925 ddi_hotplug_trigger, dig_hotplug_reg,
1926 dev_priv->hotplug.pch_hpd,
1927 icp_ddi_port_hotplug_long_detect);
1928 }
1929
1930 if (tc_hotplug_trigger) {
1931 u32 dig_hotplug_reg;
1932
1933 dig_hotplug_reg = I915_READ(SHOTPLUG_CTL_TC);
1934 I915_WRITE(SHOTPLUG_CTL_TC, dig_hotplug_reg);
1935
1936 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1937 tc_hotplug_trigger, dig_hotplug_reg,
1938 dev_priv->hotplug.pch_hpd,
1939 tc_port_hotplug_long_detect);
1940 }
1941
1942 if (pin_mask)
1943 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1944
1945 if (pch_iir & SDE_GMBUS_ICP)
1946 gmbus_irq_handler(dev_priv);
1947}
1948
1949static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
1950{
1951 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT &
1952 ~SDE_PORTE_HOTPLUG_SPT;
1953 u32 hotplug2_trigger = pch_iir & SDE_PORTE_HOTPLUG_SPT;
1954 u32 pin_mask = 0, long_mask = 0;
1955
1956 if (hotplug_trigger) {
1957 u32 dig_hotplug_reg;
1958
1959 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
1960 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
1961
1962 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1963 hotplug_trigger, dig_hotplug_reg,
1964 dev_priv->hotplug.pch_hpd,
1965 spt_port_hotplug_long_detect);
1966 }
1967
1968 if (hotplug2_trigger) {
1969 u32 dig_hotplug_reg;
1970
1971 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG2);
1972 I915_WRITE(PCH_PORT_HOTPLUG2, dig_hotplug_reg);
1973
1974 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1975 hotplug2_trigger, dig_hotplug_reg,
1976 dev_priv->hotplug.pch_hpd,
1977 spt_port_hotplug2_long_detect);
1978 }
1979
1980 if (pin_mask)
1981 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1982
1983 if (pch_iir & SDE_GMBUS_CPT)
1984 gmbus_irq_handler(dev_priv);
1985}
1986
1987static void ilk_hpd_irq_handler(struct drm_i915_private *dev_priv,
1988 u32 hotplug_trigger)
1989{
1990 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
1991
1992 dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
1993 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
1994
1995 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
1996 hotplug_trigger, dig_hotplug_reg,
1997 dev_priv->hotplug.hpd,
1998 ilk_port_hotplug_long_detect);
1999
2000 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2001}
2002
2003static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
2004 u32 de_iir)
2005{
2006 enum pipe pipe;
2007 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;
2008
2009 if (hotplug_trigger)
2010 ilk_hpd_irq_handler(dev_priv, hotplug_trigger);
2011
2012 if (de_iir & DE_AUX_CHANNEL_A)
2013 dp_aux_irq_handler(dev_priv);
2014
2015 if (de_iir & DE_GSE)
2016 intel_opregion_asle_intr(dev_priv);
2017
2018 if (de_iir & DE_POISON)
2019 drm_err(&dev_priv->drm, "Poison interrupt\n");
2020
2021 for_each_pipe(dev_priv, pipe) {
2022 if (de_iir & DE_PIPE_VBLANK(pipe))
2023 intel_handle_vblank(dev_priv, pipe);
2024
2025 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
2026 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2027
2028 if (de_iir & DE_PIPE_CRC_DONE(pipe))
2029 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
2030 }
2031
2032 /* check event from PCH */
2033 if (de_iir & DE_PCH_EVENT) {
2034 u32 pch_iir = I915_READ(SDEIIR);
2035
2036 if (HAS_PCH_CPT(dev_priv))
2037 cpt_irq_handler(dev_priv, pch_iir);
2038 else
2039 ibx_irq_handler(dev_priv, pch_iir);
2040
2041 /* should clear PCH hotplug event before clear CPU irq */
2042 I915_WRITE(SDEIIR, pch_iir);
2043 }
2044
2045 if (IS_GEN(dev_priv, 5) && de_iir & DE_PCU_EVENT)
2046 gen5_rps_irq_handler(&dev_priv->gt.rps);
2047}
2048
2049static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
2050 u32 de_iir)
2051{
2052 enum pipe pipe;
2053 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
2054
2055 if (hotplug_trigger)
2056 ilk_hpd_irq_handler(dev_priv, hotplug_trigger);
2057
2058 if (de_iir & DE_ERR_INT_IVB)
2059 ivb_err_int_handler(dev_priv);
2060
2061 if (de_iir & DE_EDP_PSR_INT_HSW) {
2062 u32 psr_iir = I915_READ(EDP_PSR_IIR);
2063
2064 intel_psr_irq_handler(dev_priv, psr_iir);
2065 I915_WRITE(EDP_PSR_IIR, psr_iir);
2066 }
2067
2068 if (de_iir & DE_AUX_CHANNEL_A_IVB)
2069 dp_aux_irq_handler(dev_priv);
2070
2071 if (de_iir & DE_GSE_IVB)
2072 intel_opregion_asle_intr(dev_priv);
2073
2074 for_each_pipe(dev_priv, pipe) {
2075 if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)))
2076 intel_handle_vblank(dev_priv, pipe);
2077 }
2078
2079 /* check event from PCH */
2080 if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) {
2081 u32 pch_iir = I915_READ(SDEIIR);
2082
2083 cpt_irq_handler(dev_priv, pch_iir);
2084
2085 /* clear PCH hotplug event before clear CPU irq */
2086 I915_WRITE(SDEIIR, pch_iir);
2087 }
2088}
2089
2090/*
2091 * To handle irqs with the minimum potential races with fresh interrupts, we:
2092 * 1 - Disable Master Interrupt Control.
2093 * 2 - Find the source(s) of the interrupt.
2094 * 3 - Clear the Interrupt Identity bits (IIR).
2095 * 4 - Process the interrupt(s) that had bits set in the IIRs.
2096 * 5 - Re-enable Master Interrupt Control.
2097 */
2098static irqreturn_t ilk_irq_handler(int irq, void *arg)
2099{
2100 struct drm_i915_private *i915 = arg;
2101 void __iomem * const regs = i915->uncore.regs;
2102 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
2103 irqreturn_t ret = IRQ_NONE;
2104
2105 if (unlikely(!intel_irqs_enabled(i915)))
2106 return IRQ_NONE;
2107
2108 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2109 disable_rpm_wakeref_asserts(&i915->runtime_pm);
2110
2111 /* disable master interrupt before clearing iir */
2112 de_ier = raw_reg_read(regs, DEIER);
2113 raw_reg_write(regs, DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
2114
2115 /* Disable south interrupts. We'll only write to SDEIIR once, so further
2116 * interrupts will will be stored on its back queue, and then we'll be
2117 * able to process them after we restore SDEIER (as soon as we restore
2118 * it, we'll get an interrupt if SDEIIR still has something to process
2119 * due to its back queue). */
2120 if (!HAS_PCH_NOP(i915)) {
2121 sde_ier = raw_reg_read(regs, SDEIER);
2122 raw_reg_write(regs, SDEIER, 0);
2123 }
2124
2125 /* Find, clear, then process each source of interrupt */
2126
2127 gt_iir = raw_reg_read(regs, GTIIR);
2128 if (gt_iir) {
2129 raw_reg_write(regs, GTIIR, gt_iir);
2130 if (INTEL_GEN(i915) >= 6)
2131 gen6_gt_irq_handler(&i915->gt, gt_iir);
2132 else
2133 gen5_gt_irq_handler(&i915->gt, gt_iir);
2134 ret = IRQ_HANDLED;
2135 }
2136
2137 de_iir = raw_reg_read(regs, DEIIR);
2138 if (de_iir) {
2139 raw_reg_write(regs, DEIIR, de_iir);
2140 if (INTEL_GEN(i915) >= 7)
2141 ivb_display_irq_handler(i915, de_iir);
2142 else
2143 ilk_display_irq_handler(i915, de_iir);
2144 ret = IRQ_HANDLED;
2145 }
2146
2147 if (INTEL_GEN(i915) >= 6) {
2148 u32 pm_iir = raw_reg_read(regs, GEN6_PMIIR);
2149 if (pm_iir) {
2150 raw_reg_write(regs, GEN6_PMIIR, pm_iir);
2151 gen6_rps_irq_handler(&i915->gt.rps, pm_iir);
2152 ret = IRQ_HANDLED;
2153 }
2154 }
2155
2156 raw_reg_write(regs, DEIER, de_ier);
2157 if (sde_ier)
2158 raw_reg_write(regs, SDEIER, sde_ier);
2159
2160 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2161 enable_rpm_wakeref_asserts(&i915->runtime_pm);
2162
2163 return ret;
2164}
2165
2166static void bxt_hpd_irq_handler(struct drm_i915_private *dev_priv,
2167 u32 hotplug_trigger)
2168{
2169 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2170
2171 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2172 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2173
2174 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2175 hotplug_trigger, dig_hotplug_reg,
2176 dev_priv->hotplug.hpd,
2177 bxt_port_hotplug_long_detect);
2178
2179 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2180}
2181
2182static void gen11_hpd_irq_handler(struct drm_i915_private *dev_priv, u32 iir)
2183{
2184 u32 pin_mask = 0, long_mask = 0;
2185 u32 trigger_tc = iir & GEN11_DE_TC_HOTPLUG_MASK;
2186 u32 trigger_tbt = iir & GEN11_DE_TBT_HOTPLUG_MASK;
2187 long_pulse_detect_func long_pulse_detect;
2188
2189 if (INTEL_GEN(dev_priv) >= 12)
2190 long_pulse_detect = gen12_port_hotplug_long_detect;
2191 else
2192 long_pulse_detect = gen11_port_hotplug_long_detect;
2193
2194 if (trigger_tc) {
2195 u32 dig_hotplug_reg;
2196
2197 dig_hotplug_reg = I915_READ(GEN11_TC_HOTPLUG_CTL);
2198 I915_WRITE(GEN11_TC_HOTPLUG_CTL, dig_hotplug_reg);
2199
2200 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2201 trigger_tc, dig_hotplug_reg,
2202 dev_priv->hotplug.hpd,
2203 long_pulse_detect);
2204 }
2205
2206 if (trigger_tbt) {
2207 u32 dig_hotplug_reg;
2208
2209 dig_hotplug_reg = I915_READ(GEN11_TBT_HOTPLUG_CTL);
2210 I915_WRITE(GEN11_TBT_HOTPLUG_CTL, dig_hotplug_reg);
2211
2212 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2213 trigger_tbt, dig_hotplug_reg,
2214 dev_priv->hotplug.hpd,
2215 long_pulse_detect);
2216 }
2217
2218 if (pin_mask)
2219 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2220 else
2221 drm_err(&dev_priv->drm,
2222 "Unexpected DE HPD interrupt 0x%08x\n", iir);
2223}
2224
2225static u32 gen8_de_port_aux_mask(struct drm_i915_private *dev_priv)
2226{
2227 u32 mask;
2228
2229 if (INTEL_GEN(dev_priv) >= 12)
2230 return TGL_DE_PORT_AUX_DDIA |
2231 TGL_DE_PORT_AUX_DDIB |
2232 TGL_DE_PORT_AUX_DDIC |
2233 TGL_DE_PORT_AUX_USBC1 |
2234 TGL_DE_PORT_AUX_USBC2 |
2235 TGL_DE_PORT_AUX_USBC3 |
2236 TGL_DE_PORT_AUX_USBC4 |
2237 TGL_DE_PORT_AUX_USBC5 |
2238 TGL_DE_PORT_AUX_USBC6;
2239
2240
2241 mask = GEN8_AUX_CHANNEL_A;
2242 if (INTEL_GEN(dev_priv) >= 9)
2243 mask |= GEN9_AUX_CHANNEL_B |
2244 GEN9_AUX_CHANNEL_C |
2245 GEN9_AUX_CHANNEL_D;
2246
2247 if (IS_CNL_WITH_PORT_F(dev_priv) || IS_GEN(dev_priv, 11))
2248 mask |= CNL_AUX_CHANNEL_F;
2249
2250 if (IS_GEN(dev_priv, 11))
2251 mask |= ICL_AUX_CHANNEL_E;
2252
2253 return mask;
2254}
2255
2256static u32 gen8_de_pipe_fault_mask(struct drm_i915_private *dev_priv)
2257{
2258 if (IS_ROCKETLAKE(dev_priv))
2259 return RKL_DE_PIPE_IRQ_FAULT_ERRORS;
2260 else if (INTEL_GEN(dev_priv) >= 11)
2261 return GEN11_DE_PIPE_IRQ_FAULT_ERRORS;
2262 else if (INTEL_GEN(dev_priv) >= 9)
2263 return GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
2264 else
2265 return GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2266}
2267
2268static void
2269gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir)
2270{
2271 bool found = false;
2272
2273 if (iir & GEN8_DE_MISC_GSE) {
2274 intel_opregion_asle_intr(dev_priv);
2275 found = true;
2276 }
2277
2278 if (iir & GEN8_DE_EDP_PSR) {
2279 u32 psr_iir;
2280 i915_reg_t iir_reg;
2281
2282 if (INTEL_GEN(dev_priv) >= 12)
2283 iir_reg = TRANS_PSR_IIR(dev_priv->psr.transcoder);
2284 else
2285 iir_reg = EDP_PSR_IIR;
2286
2287 psr_iir = I915_READ(iir_reg);
2288 I915_WRITE(iir_reg, psr_iir);
2289
2290 if (psr_iir)
2291 found = true;
2292
2293 intel_psr_irq_handler(dev_priv, psr_iir);
2294 }
2295
2296 if (!found)
2297 drm_err(&dev_priv->drm, "Unexpected DE Misc interrupt\n");
2298}
2299
2300static irqreturn_t
2301gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
2302{
2303 irqreturn_t ret = IRQ_NONE;
2304 u32 iir;
2305 enum pipe pipe;
2306
2307 if (master_ctl & GEN8_DE_MISC_IRQ) {
2308 iir = I915_READ(GEN8_DE_MISC_IIR);
2309 if (iir) {
2310 I915_WRITE(GEN8_DE_MISC_IIR, iir);
2311 ret = IRQ_HANDLED;
2312 gen8_de_misc_irq_handler(dev_priv, iir);
2313 } else {
2314 drm_err(&dev_priv->drm,
2315 "The master control interrupt lied (DE MISC)!\n");
2316 }
2317 }
2318
2319 if (INTEL_GEN(dev_priv) >= 11 && (master_ctl & GEN11_DE_HPD_IRQ)) {
2320 iir = I915_READ(GEN11_DE_HPD_IIR);
2321 if (iir) {
2322 I915_WRITE(GEN11_DE_HPD_IIR, iir);
2323 ret = IRQ_HANDLED;
2324 gen11_hpd_irq_handler(dev_priv, iir);
2325 } else {
2326 drm_err(&dev_priv->drm,
2327 "The master control interrupt lied, (DE HPD)!\n");
2328 }
2329 }
2330
2331 if (master_ctl & GEN8_DE_PORT_IRQ) {
2332 iir = I915_READ(GEN8_DE_PORT_IIR);
2333 if (iir) {
2334 u32 tmp_mask;
2335 bool found = false;
2336
2337 I915_WRITE(GEN8_DE_PORT_IIR, iir);
2338 ret = IRQ_HANDLED;
2339
2340 if (iir & gen8_de_port_aux_mask(dev_priv)) {
2341 dp_aux_irq_handler(dev_priv);
2342 found = true;
2343 }
2344
2345 if (IS_GEN9_LP(dev_priv)) {
2346 tmp_mask = iir & BXT_DE_PORT_HOTPLUG_MASK;
2347 if (tmp_mask) {
2348 bxt_hpd_irq_handler(dev_priv, tmp_mask);
2349 found = true;
2350 }
2351 } else if (IS_BROADWELL(dev_priv)) {
2352 tmp_mask = iir & GEN8_PORT_DP_A_HOTPLUG;
2353 if (tmp_mask) {
2354 ilk_hpd_irq_handler(dev_priv, tmp_mask);
2355 found = true;
2356 }
2357 }
2358
2359 if (IS_GEN9_LP(dev_priv) && (iir & BXT_DE_PORT_GMBUS)) {
2360 gmbus_irq_handler(dev_priv);
2361 found = true;
2362 }
2363
2364 if (!found)
2365 drm_err(&dev_priv->drm,
2366 "Unexpected DE Port interrupt\n");
2367 }
2368 else
2369 drm_err(&dev_priv->drm,
2370 "The master control interrupt lied (DE PORT)!\n");
2371 }
2372
2373 for_each_pipe(dev_priv, pipe) {
2374 u32 fault_errors;
2375
2376 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2377 continue;
2378
2379 iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2380 if (!iir) {
2381 drm_err(&dev_priv->drm,
2382 "The master control interrupt lied (DE PIPE)!\n");
2383 continue;
2384 }
2385
2386 ret = IRQ_HANDLED;
2387 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), iir);
2388
2389 if (iir & GEN8_PIPE_VBLANK)
2390 intel_handle_vblank(dev_priv, pipe);
2391
2392 if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
2393 hsw_pipe_crc_irq_handler(dev_priv, pipe);
2394
2395 if (iir & GEN8_PIPE_FIFO_UNDERRUN)
2396 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2397
2398 fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv);
2399 if (fault_errors)
2400 drm_err(&dev_priv->drm,
2401 "Fault errors on pipe %c: 0x%08x\n",
2402 pipe_name(pipe),
2403 fault_errors);
2404 }
2405
2406 if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) &&
2407 master_ctl & GEN8_DE_PCH_IRQ) {
2408 /*
2409 * FIXME(BDW): Assume for now that the new interrupt handling
2410 * scheme also closed the SDE interrupt handling race we've seen
2411 * on older pch-split platforms. But this needs testing.
2412 */
2413 iir = I915_READ(SDEIIR);
2414 if (iir) {
2415 I915_WRITE(SDEIIR, iir);
2416 ret = IRQ_HANDLED;
2417
2418 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
2419 icp_irq_handler(dev_priv, iir);
2420 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT)
2421 spt_irq_handler(dev_priv, iir);
2422 else
2423 cpt_irq_handler(dev_priv, iir);
2424 } else {
2425 /*
2426 * Like on previous PCH there seems to be something
2427 * fishy going on with forwarding PCH interrupts.
2428 */
2429 drm_dbg(&dev_priv->drm,
2430 "The master control interrupt lied (SDE)!\n");
2431 }
2432 }
2433
2434 return ret;
2435}
2436
2437static inline u32 gen8_master_intr_disable(void __iomem * const regs)
2438{
2439 raw_reg_write(regs, GEN8_MASTER_IRQ, 0);
2440
2441 /*
2442 * Now with master disabled, get a sample of level indications
2443 * for this interrupt. Indications will be cleared on related acks.
2444 * New indications can and will light up during processing,
2445 * and will generate new interrupt after enabling master.
2446 */
2447 return raw_reg_read(regs, GEN8_MASTER_IRQ);
2448}
2449
2450static inline void gen8_master_intr_enable(void __iomem * const regs)
2451{
2452 raw_reg_write(regs, GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2453}
2454
2455static irqreturn_t gen8_irq_handler(int irq, void *arg)
2456{
2457 struct drm_i915_private *dev_priv = arg;
2458 void __iomem * const regs = dev_priv->uncore.regs;
2459 u32 master_ctl;
2460
2461 if (!intel_irqs_enabled(dev_priv))
2462 return IRQ_NONE;
2463
2464 master_ctl = gen8_master_intr_disable(regs);
2465 if (!master_ctl) {
2466 gen8_master_intr_enable(regs);
2467 return IRQ_NONE;
2468 }
2469
2470 /* Find, queue (onto bottom-halves), then clear each source */
2471 gen8_gt_irq_handler(&dev_priv->gt, master_ctl);
2472
2473 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2474 if (master_ctl & ~GEN8_GT_IRQS) {
2475 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
2476 gen8_de_irq_handler(dev_priv, master_ctl);
2477 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
2478 }
2479
2480 gen8_master_intr_enable(regs);
2481
2482 return IRQ_HANDLED;
2483}
2484
2485static u32
2486gen11_gu_misc_irq_ack(struct intel_gt *gt, const u32 master_ctl)
2487{
2488 void __iomem * const regs = gt->uncore->regs;
2489 u32 iir;
2490
2491 if (!(master_ctl & GEN11_GU_MISC_IRQ))
2492 return 0;
2493
2494 iir = raw_reg_read(regs, GEN11_GU_MISC_IIR);
2495 if (likely(iir))
2496 raw_reg_write(regs, GEN11_GU_MISC_IIR, iir);
2497
2498 return iir;
2499}
2500
2501static void
2502gen11_gu_misc_irq_handler(struct intel_gt *gt, const u32 iir)
2503{
2504 if (iir & GEN11_GU_MISC_GSE)
2505 intel_opregion_asle_intr(gt->i915);
2506}
2507
2508static inline u32 gen11_master_intr_disable(void __iomem * const regs)
2509{
2510 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, 0);
2511
2512 /*
2513 * Now with master disabled, get a sample of level indications
2514 * for this interrupt. Indications will be cleared on related acks.
2515 * New indications can and will light up during processing,
2516 * and will generate new interrupt after enabling master.
2517 */
2518 return raw_reg_read(regs, GEN11_GFX_MSTR_IRQ);
2519}
2520
2521static inline void gen11_master_intr_enable(void __iomem * const regs)
2522{
2523 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ);
2524}
2525
2526static void
2527gen11_display_irq_handler(struct drm_i915_private *i915)
2528{
2529 void __iomem * const regs = i915->uncore.regs;
2530 const u32 disp_ctl = raw_reg_read(regs, GEN11_DISPLAY_INT_CTL);
2531
2532 disable_rpm_wakeref_asserts(&i915->runtime_pm);
2533 /*
2534 * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ
2535 * for the display related bits.
2536 */
2537 raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 0x0);
2538 gen8_de_irq_handler(i915, disp_ctl);
2539 raw_reg_write(regs, GEN11_DISPLAY_INT_CTL,
2540 GEN11_DISPLAY_IRQ_ENABLE);
2541
2542 enable_rpm_wakeref_asserts(&i915->runtime_pm);
2543}
2544
2545static __always_inline irqreturn_t
2546__gen11_irq_handler(struct drm_i915_private * const i915,
2547 u32 (*intr_disable)(void __iomem * const regs),
2548 void (*intr_enable)(void __iomem * const regs))
2549{
2550 void __iomem * const regs = i915->uncore.regs;
2551 struct intel_gt *gt = &i915->gt;
2552 u32 master_ctl;
2553 u32 gu_misc_iir;
2554
2555 if (!intel_irqs_enabled(i915))
2556 return IRQ_NONE;
2557
2558 master_ctl = intr_disable(regs);
2559 if (!master_ctl) {
2560 intr_enable(regs);
2561 return IRQ_NONE;
2562 }
2563
2564 /* Find, queue (onto bottom-halves), then clear each source */
2565 gen11_gt_irq_handler(gt, master_ctl);
2566
2567 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2568 if (master_ctl & GEN11_DISPLAY_IRQ)
2569 gen11_display_irq_handler(i915);
2570
2571 gu_misc_iir = gen11_gu_misc_irq_ack(gt, master_ctl);
2572
2573 intr_enable(regs);
2574
2575 gen11_gu_misc_irq_handler(gt, gu_misc_iir);
2576
2577 return IRQ_HANDLED;
2578}
2579
2580static irqreturn_t gen11_irq_handler(int irq, void *arg)
2581{
2582 return __gen11_irq_handler(arg,
2583 gen11_master_intr_disable,
2584 gen11_master_intr_enable);
2585}
2586
2587static u32 dg1_master_intr_disable_and_ack(void __iomem * const regs)
2588{
2589 u32 val;
2590
2591 /* First disable interrupts */
2592 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, 0);
2593
2594 /* Get the indication levels and ack the master unit */
2595 val = raw_reg_read(regs, DG1_MSTR_UNIT_INTR);
2596 if (unlikely(!val))
2597 return 0;
2598
2599 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, val);
2600
2601 /*
2602 * Now with master disabled, get a sample of level indications
2603 * for this interrupt and ack them right away - we keep GEN11_MASTER_IRQ
2604 * out as this bit doesn't exist anymore for DG1
2605 */
2606 val = raw_reg_read(regs, GEN11_GFX_MSTR_IRQ) & ~GEN11_MASTER_IRQ;
2607 if (unlikely(!val))
2608 return 0;
2609
2610 raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, val);
2611
2612 return val;
2613}
2614
2615static inline void dg1_master_intr_enable(void __iomem * const regs)
2616{
2617 raw_reg_write(regs, DG1_MSTR_UNIT_INTR, DG1_MSTR_IRQ);
2618}
2619
2620static irqreturn_t dg1_irq_handler(int irq, void *arg)
2621{
2622 return __gen11_irq_handler(arg,
2623 dg1_master_intr_disable_and_ack,
2624 dg1_master_intr_enable);
2625}
2626
2627/* Called from drm generic code, passed 'crtc' which
2628 * we use as a pipe index
2629 */
2630int i8xx_enable_vblank(struct drm_crtc *crtc)
2631{
2632 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2633 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2634 unsigned long irqflags;
2635
2636 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2637 i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
2638 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2639
2640 return 0;
2641}
2642
2643int i915gm_enable_vblank(struct drm_crtc *crtc)
2644{
2645 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2646
2647 /*
2648 * Vblank interrupts fail to wake the device up from C2+.
2649 * Disabling render clock gating during C-states avoids
2650 * the problem. There is a small power cost so we do this
2651 * only when vblank interrupts are actually enabled.
2652 */
2653 if (dev_priv->vblank_enabled++ == 0)
2654 I915_WRITE(SCPD0, _MASKED_BIT_ENABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE));
2655
2656 return i8xx_enable_vblank(crtc);
2657}
2658
2659int i965_enable_vblank(struct drm_crtc *crtc)
2660{
2661 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2662 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2663 unsigned long irqflags;
2664
2665 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2666 i915_enable_pipestat(dev_priv, pipe,
2667 PIPE_START_VBLANK_INTERRUPT_STATUS);
2668 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2669
2670 return 0;
2671}
2672
2673int ilk_enable_vblank(struct drm_crtc *crtc)
2674{
2675 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2676 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2677 unsigned long irqflags;
2678 u32 bit = INTEL_GEN(dev_priv) >= 7 ?
2679 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
2680
2681 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2682 ilk_enable_display_irq(dev_priv, bit);
2683 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2684
2685 /* Even though there is no DMC, frame counter can get stuck when
2686 * PSR is active as no frames are generated.
2687 */
2688 if (HAS_PSR(dev_priv))
2689 drm_crtc_vblank_restore(crtc);
2690
2691 return 0;
2692}
2693
2694int bdw_enable_vblank(struct drm_crtc *crtc)
2695{
2696 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2697 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2698 unsigned long irqflags;
2699
2700 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2701 bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
2702 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2703
2704 /* Even if there is no DMC, frame counter can get stuck when
2705 * PSR is active as no frames are generated, so check only for PSR.
2706 */
2707 if (HAS_PSR(dev_priv))
2708 drm_crtc_vblank_restore(crtc);
2709
2710 return 0;
2711}
2712
2713/* Called from drm generic code, passed 'crtc' which
2714 * we use as a pipe index
2715 */
2716void i8xx_disable_vblank(struct drm_crtc *crtc)
2717{
2718 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2719 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2720 unsigned long irqflags;
2721
2722 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2723 i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
2724 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2725}
2726
2727void i915gm_disable_vblank(struct drm_crtc *crtc)
2728{
2729 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2730
2731 i8xx_disable_vblank(crtc);
2732
2733 if (--dev_priv->vblank_enabled == 0)
2734 I915_WRITE(SCPD0, _MASKED_BIT_DISABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE));
2735}
2736
2737void i965_disable_vblank(struct drm_crtc *crtc)
2738{
2739 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2740 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2741 unsigned long irqflags;
2742
2743 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2744 i915_disable_pipestat(dev_priv, pipe,
2745 PIPE_START_VBLANK_INTERRUPT_STATUS);
2746 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2747}
2748
2749void ilk_disable_vblank(struct drm_crtc *crtc)
2750{
2751 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2752 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2753 unsigned long irqflags;
2754 u32 bit = INTEL_GEN(dev_priv) >= 7 ?
2755 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
2756
2757 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2758 ilk_disable_display_irq(dev_priv, bit);
2759 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2760}
2761
2762void bdw_disable_vblank(struct drm_crtc *crtc)
2763{
2764 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
2765 enum pipe pipe = to_intel_crtc(crtc)->pipe;
2766 unsigned long irqflags;
2767
2768 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2769 bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
2770 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2771}
2772
2773static void ibx_irq_reset(struct drm_i915_private *dev_priv)
2774{
2775 struct intel_uncore *uncore = &dev_priv->uncore;
2776
2777 if (HAS_PCH_NOP(dev_priv))
2778 return;
2779
2780 GEN3_IRQ_RESET(uncore, SDE);
2781
2782 if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
2783 I915_WRITE(SERR_INT, 0xffffffff);
2784}
2785
2786/*
2787 * SDEIER is also touched by the interrupt handler to work around missed PCH
2788 * interrupts. Hence we can't update it after the interrupt handler is enabled -
2789 * instead we unconditionally enable all PCH interrupt sources here, but then
2790 * only unmask them as needed with SDEIMR.
2791 *
2792 * This function needs to be called before interrupts are enabled.
2793 */
2794static void ibx_irq_pre_postinstall(struct drm_i915_private *dev_priv)
2795{
2796 if (HAS_PCH_NOP(dev_priv))
2797 return;
2798
2799 drm_WARN_ON(&dev_priv->drm, I915_READ(SDEIER) != 0);
2800 I915_WRITE(SDEIER, 0xffffffff);
2801 POSTING_READ(SDEIER);
2802}
2803
2804static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
2805{
2806 struct intel_uncore *uncore = &dev_priv->uncore;
2807
2808 if (IS_CHERRYVIEW(dev_priv))
2809 intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
2810 else
2811 intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK);
2812
2813 i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
2814 intel_uncore_write(uncore, PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2815
2816 i9xx_pipestat_irq_reset(dev_priv);
2817
2818 GEN3_IRQ_RESET(uncore, VLV_);
2819 dev_priv->irq_mask = ~0u;
2820}
2821
2822static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
2823{
2824 struct intel_uncore *uncore = &dev_priv->uncore;
2825
2826 u32 pipestat_mask;
2827 u32 enable_mask;
2828 enum pipe pipe;
2829
2830 pipestat_mask = PIPE_CRC_DONE_INTERRUPT_STATUS;
2831
2832 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
2833 for_each_pipe(dev_priv, pipe)
2834 i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
2835
2836 enable_mask = I915_DISPLAY_PORT_INTERRUPT |
2837 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2838 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2839 I915_LPE_PIPE_A_INTERRUPT |
2840 I915_LPE_PIPE_B_INTERRUPT;
2841
2842 if (IS_CHERRYVIEW(dev_priv))
2843 enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT |
2844 I915_LPE_PIPE_C_INTERRUPT;
2845
2846 drm_WARN_ON(&dev_priv->drm, dev_priv->irq_mask != ~0u);
2847
2848 dev_priv->irq_mask = ~enable_mask;
2849
2850 GEN3_IRQ_INIT(uncore, VLV_, dev_priv->irq_mask, enable_mask);
2851}
2852
2853/* drm_dma.h hooks
2854*/
2855static void ilk_irq_reset(struct drm_i915_private *dev_priv)
2856{
2857 struct intel_uncore *uncore = &dev_priv->uncore;
2858
2859 GEN3_IRQ_RESET(uncore, DE);
2860 if (IS_GEN(dev_priv, 7))
2861 intel_uncore_write(uncore, GEN7_ERR_INT, 0xffffffff);
2862
2863 if (IS_HASWELL(dev_priv)) {
2864 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
2865 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
2866 }
2867
2868 gen5_gt_irq_reset(&dev_priv->gt);
2869
2870 ibx_irq_reset(dev_priv);
2871}
2872
2873static void valleyview_irq_reset(struct drm_i915_private *dev_priv)
2874{
2875 I915_WRITE(VLV_MASTER_IER, 0);
2876 POSTING_READ(VLV_MASTER_IER);
2877
2878 gen5_gt_irq_reset(&dev_priv->gt);
2879
2880 spin_lock_irq(&dev_priv->irq_lock);
2881 if (dev_priv->display_irqs_enabled)
2882 vlv_display_irq_reset(dev_priv);
2883 spin_unlock_irq(&dev_priv->irq_lock);
2884}
2885
2886static void gen8_irq_reset(struct drm_i915_private *dev_priv)
2887{
2888 struct intel_uncore *uncore = &dev_priv->uncore;
2889 enum pipe pipe;
2890
2891 gen8_master_intr_disable(dev_priv->uncore.regs);
2892
2893 gen8_gt_irq_reset(&dev_priv->gt);
2894
2895 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
2896 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
2897
2898 for_each_pipe(dev_priv, pipe)
2899 if (intel_display_power_is_enabled(dev_priv,
2900 POWER_DOMAIN_PIPE(pipe)))
2901 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
2902
2903 GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
2904 GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
2905 GEN3_IRQ_RESET(uncore, GEN8_PCU_);
2906
2907 if (HAS_PCH_SPLIT(dev_priv))
2908 ibx_irq_reset(dev_priv);
2909}
2910
2911static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
2912{
2913 struct intel_uncore *uncore = &dev_priv->uncore;
2914 enum pipe pipe;
2915 u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
2916 BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
2917
2918 intel_uncore_write(uncore, GEN11_DISPLAY_INT_CTL, 0);
2919
2920 if (INTEL_GEN(dev_priv) >= 12) {
2921 enum transcoder trans;
2922
2923 for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
2924 enum intel_display_power_domain domain;
2925
2926 domain = POWER_DOMAIN_TRANSCODER(trans);
2927 if (!intel_display_power_is_enabled(dev_priv, domain))
2928 continue;
2929
2930 intel_uncore_write(uncore, TRANS_PSR_IMR(trans), 0xffffffff);
2931 intel_uncore_write(uncore, TRANS_PSR_IIR(trans), 0xffffffff);
2932 }
2933 } else {
2934 intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
2935 intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
2936 }
2937
2938 for_each_pipe(dev_priv, pipe)
2939 if (intel_display_power_is_enabled(dev_priv,
2940 POWER_DOMAIN_PIPE(pipe)))
2941 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
2942
2943 GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
2944 GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
2945 GEN3_IRQ_RESET(uncore, GEN11_DE_HPD_);
2946
2947 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
2948 GEN3_IRQ_RESET(uncore, SDE);
2949
2950 /* Wa_14010685332:icl,jsl,ehl,tgl,rkl */
2951 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) {
2952 intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
2953 SBCLK_RUN_REFCLK_DIS, SBCLK_RUN_REFCLK_DIS);
2954 intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
2955 SBCLK_RUN_REFCLK_DIS, 0);
2956 }
2957}
2958
2959static void gen11_irq_reset(struct drm_i915_private *dev_priv)
2960{
2961 struct intel_uncore *uncore = &dev_priv->uncore;
2962
2963 if (HAS_MASTER_UNIT_IRQ(dev_priv))
2964 dg1_master_intr_disable_and_ack(dev_priv->uncore.regs);
2965 else
2966 gen11_master_intr_disable(dev_priv->uncore.regs);
2967
2968 gen11_gt_irq_reset(&dev_priv->gt);
2969 gen11_display_irq_reset(dev_priv);
2970
2971 GEN3_IRQ_RESET(uncore, GEN11_GU_MISC_);
2972 GEN3_IRQ_RESET(uncore, GEN8_PCU_);
2973}
2974
2975void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
2976 u8 pipe_mask)
2977{
2978 struct intel_uncore *uncore = &dev_priv->uncore;
2979
2980 u32 extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
2981 enum pipe pipe;
2982
2983 spin_lock_irq(&dev_priv->irq_lock);
2984
2985 if (!intel_irqs_enabled(dev_priv)) {
2986 spin_unlock_irq(&dev_priv->irq_lock);
2987 return;
2988 }
2989
2990 for_each_pipe_masked(dev_priv, pipe, pipe_mask)
2991 GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
2992 dev_priv->de_irq_mask[pipe],
2993 ~dev_priv->de_irq_mask[pipe] | extra_ier);
2994
2995 spin_unlock_irq(&dev_priv->irq_lock);
2996}
2997
2998void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
2999 u8 pipe_mask)
3000{
3001 struct intel_uncore *uncore = &dev_priv->uncore;
3002 enum pipe pipe;
3003
3004 spin_lock_irq(&dev_priv->irq_lock);
3005
3006 if (!intel_irqs_enabled(dev_priv)) {
3007 spin_unlock_irq(&dev_priv->irq_lock);
3008 return;
3009 }
3010
3011 for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3012 GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);
3013
3014 spin_unlock_irq(&dev_priv->irq_lock);
3015
3016 /* make sure we're done processing display irqs */
3017 intel_synchronize_irq(dev_priv);
3018}
3019
3020static void cherryview_irq_reset(struct drm_i915_private *dev_priv)
3021{
3022 struct intel_uncore *uncore = &dev_priv->uncore;
3023
3024 I915_WRITE(GEN8_MASTER_IRQ, 0);
3025 POSTING_READ(GEN8_MASTER_IRQ);
3026
3027 gen8_gt_irq_reset(&dev_priv->gt);
3028
3029 GEN3_IRQ_RESET(uncore, GEN8_PCU_);
3030
3031 spin_lock_irq(&dev_priv->irq_lock);
3032 if (dev_priv->display_irqs_enabled)
3033 vlv_display_irq_reset(dev_priv);
3034 spin_unlock_irq(&dev_priv->irq_lock);
3035}
3036
3037static u32 intel_hpd_enabled_irqs(struct drm_i915_private *dev_priv,
3038 const u32 hpd[HPD_NUM_PINS])
3039{
3040 struct intel_encoder *encoder;
3041 u32 enabled_irqs = 0;
3042
3043 for_each_intel_encoder(&dev_priv->drm, encoder)
3044 if (dev_priv->hotplug.stats[encoder->hpd_pin].state == HPD_ENABLED)
3045 enabled_irqs |= hpd[encoder->hpd_pin];
3046
3047 return enabled_irqs;
3048}
3049
3050static void ibx_hpd_detection_setup(struct drm_i915_private *dev_priv)
3051{
3052 u32 hotplug;
3053
3054 /*
3055 * Enable digital hotplug on the PCH, and configure the DP short pulse
3056 * duration to 2ms (which is the minimum in the Display Port spec).
3057 * The pulse duration bits are reserved on LPT+.
3058 */
3059 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3060 hotplug &= ~(PORTB_PULSE_DURATION_MASK |
3061 PORTC_PULSE_DURATION_MASK |
3062 PORTD_PULSE_DURATION_MASK);
3063 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
3064 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
3065 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
3066 /*
3067 * When CPU and PCH are on the same package, port A
3068 * HPD must be enabled in both north and south.
3069 */
3070 if (HAS_PCH_LPT_LP(dev_priv))
3071 hotplug |= PORTA_HOTPLUG_ENABLE;
3072 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3073}
3074
3075static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv)
3076{
3077 u32 hotplug_irqs, enabled_irqs;
3078
3079 if (HAS_PCH_IBX(dev_priv))
3080 hotplug_irqs = SDE_HOTPLUG_MASK;
3081 else
3082 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
3083
3084 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3085
3086 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3087
3088 ibx_hpd_detection_setup(dev_priv);
3089}
3090
3091static void icp_hpd_detection_setup(struct drm_i915_private *dev_priv,
3092 u32 ddi_hotplug_enable_mask,
3093 u32 tc_hotplug_enable_mask)
3094{
3095 u32 hotplug;
3096
3097 hotplug = I915_READ(SHOTPLUG_CTL_DDI);
3098 hotplug |= ddi_hotplug_enable_mask;
3099 I915_WRITE(SHOTPLUG_CTL_DDI, hotplug);
3100
3101 if (tc_hotplug_enable_mask) {
3102 hotplug = I915_READ(SHOTPLUG_CTL_TC);
3103 hotplug |= tc_hotplug_enable_mask;
3104 I915_WRITE(SHOTPLUG_CTL_TC, hotplug);
3105 }
3106}
3107
3108static void icp_hpd_irq_setup(struct drm_i915_private *dev_priv,
3109 u32 sde_ddi_mask, u32 sde_tc_mask,
3110 u32 ddi_enable_mask, u32 tc_enable_mask)
3111{
3112 u32 hotplug_irqs, enabled_irqs;
3113
3114 hotplug_irqs = sde_ddi_mask | sde_tc_mask;
3115 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3116
3117 if (INTEL_PCH_TYPE(dev_priv) <= PCH_TGP)
3118 I915_WRITE(SHPD_FILTER_CNT, SHPD_FILTER_CNT_500_ADJ);
3119
3120 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3121
3122 icp_hpd_detection_setup(dev_priv, ddi_enable_mask, tc_enable_mask);
3123}
3124
3125/*
3126 * EHL doesn't need most of gen11_hpd_irq_setup, it's handling only the
3127 * equivalent of SDE.
3128 */
3129static void mcc_hpd_irq_setup(struct drm_i915_private *dev_priv)
3130{
3131 icp_hpd_irq_setup(dev_priv,
3132 SDE_DDI_MASK_ICP, SDE_TC_HOTPLUG_ICP(PORT_TC1),
3133 ICP_DDI_HPD_ENABLE_MASK, ICP_TC_HPD_ENABLE(PORT_TC1));
3134}
3135
3136/*
3137 * JSP behaves exactly the same as MCC above except that port C is mapped to
3138 * the DDI-C pins instead of the TC1 pins. This means we should follow TGP's
3139 * masks & tables rather than ICP's masks & tables.
3140 */
3141static void jsp_hpd_irq_setup(struct drm_i915_private *dev_priv)
3142{
3143 icp_hpd_irq_setup(dev_priv,
3144 SDE_DDI_MASK_TGP, 0,
3145 TGP_DDI_HPD_ENABLE_MASK, 0);
3146}
3147
3148static void gen11_hpd_detection_setup(struct drm_i915_private *dev_priv)
3149{
3150 u32 hotplug;
3151
3152 hotplug = I915_READ(GEN11_TC_HOTPLUG_CTL);
3153 hotplug |= GEN11_HOTPLUG_CTL_ENABLE(PORT_TC1) |
3154 GEN11_HOTPLUG_CTL_ENABLE(PORT_TC2) |
3155 GEN11_HOTPLUG_CTL_ENABLE(PORT_TC3) |
3156 GEN11_HOTPLUG_CTL_ENABLE(PORT_TC4);
3157 I915_WRITE(GEN11_TC_HOTPLUG_CTL, hotplug);
3158
3159 hotplug = I915_READ(GEN11_TBT_HOTPLUG_CTL);
3160 hotplug |= GEN11_HOTPLUG_CTL_ENABLE(PORT_TC1) |
3161 GEN11_HOTPLUG_CTL_ENABLE(PORT_TC2) |
3162 GEN11_HOTPLUG_CTL_ENABLE(PORT_TC3) |
3163 GEN11_HOTPLUG_CTL_ENABLE(PORT_TC4);
3164 I915_WRITE(GEN11_TBT_HOTPLUG_CTL, hotplug);
3165}
3166
3167static void gen11_hpd_irq_setup(struct drm_i915_private *dev_priv)
3168{
3169 u32 hotplug_irqs, enabled_irqs;
3170 u32 val;
3171
3172 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3173 hotplug_irqs = GEN11_DE_TC_HOTPLUG_MASK | GEN11_DE_TBT_HOTPLUG_MASK;
3174
3175 val = I915_READ(GEN11_DE_HPD_IMR);
3176 val &= ~hotplug_irqs;
3177 val |= ~enabled_irqs & hotplug_irqs;
3178 I915_WRITE(GEN11_DE_HPD_IMR, val);
3179 POSTING_READ(GEN11_DE_HPD_IMR);
3180
3181 gen11_hpd_detection_setup(dev_priv);
3182
3183 if (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP)
3184 icp_hpd_irq_setup(dev_priv, SDE_DDI_MASK_TGP, SDE_TC_MASK_TGP,
3185 TGP_DDI_HPD_ENABLE_MASK, TGP_TC_HPD_ENABLE_MASK);
3186 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
3187 icp_hpd_irq_setup(dev_priv, SDE_DDI_MASK_ICP, SDE_TC_MASK_ICP,
3188 ICP_DDI_HPD_ENABLE_MASK, ICP_TC_HPD_ENABLE_MASK);
3189}
3190
3191static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3192{
3193 u32 val, hotplug;
3194
3195 /* Display WA #1179 WaHardHangonHotPlug: cnp */
3196 if (HAS_PCH_CNP(dev_priv)) {
3197 val = I915_READ(SOUTH_CHICKEN1);
3198 val &= ~CHASSIS_CLK_REQ_DURATION_MASK;
3199 val |= CHASSIS_CLK_REQ_DURATION(0xf);
3200 I915_WRITE(SOUTH_CHICKEN1, val);
3201 }
3202
3203 /* Enable digital hotplug on the PCH */
3204 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3205 hotplug |= PORTA_HOTPLUG_ENABLE |
3206 PORTB_HOTPLUG_ENABLE |
3207 PORTC_HOTPLUG_ENABLE |
3208 PORTD_HOTPLUG_ENABLE;
3209 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3210
3211 hotplug = I915_READ(PCH_PORT_HOTPLUG2);
3212 hotplug |= PORTE_HOTPLUG_ENABLE;
3213 I915_WRITE(PCH_PORT_HOTPLUG2, hotplug);
3214}
3215
3216static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3217{
3218 u32 hotplug_irqs, enabled_irqs;
3219
3220 if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
3221 I915_WRITE(SHPD_FILTER_CNT, SHPD_FILTER_CNT_500_ADJ);
3222
3223 hotplug_irqs = SDE_HOTPLUG_MASK_SPT;
3224 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.pch_hpd);
3225
3226 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3227
3228 spt_hpd_detection_setup(dev_priv);
3229}
3230
3231static void ilk_hpd_detection_setup(struct drm_i915_private *dev_priv)
3232{
3233 u32 hotplug;
3234
3235 /*
3236 * Enable digital hotplug on the CPU, and configure the DP short pulse
3237 * duration to 2ms (which is the minimum in the Display Port spec)
3238 * The pulse duration bits are reserved on HSW+.
3239 */
3240 hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
3241 hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK;
3242 hotplug |= DIGITAL_PORTA_HOTPLUG_ENABLE |
3243 DIGITAL_PORTA_PULSE_DURATION_2ms;
3244 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);
3245}
3246
3247static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv)
3248{
3249 u32 hotplug_irqs, enabled_irqs;
3250
3251 if (INTEL_GEN(dev_priv) >= 8) {
3252 hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
3253 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3254
3255 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3256 } else if (INTEL_GEN(dev_priv) >= 7) {
3257 hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
3258 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3259
3260 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3261 } else {
3262 hotplug_irqs = DE_DP_A_HOTPLUG;
3263 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3264
3265 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3266 }
3267
3268 ilk_hpd_detection_setup(dev_priv);
3269
3270 ibx_hpd_irq_setup(dev_priv);
3271}
3272
3273static void __bxt_hpd_detection_setup(struct drm_i915_private *dev_priv,
3274 u32 enabled_irqs)
3275{
3276 u32 hotplug;
3277
3278 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3279 hotplug |= PORTA_HOTPLUG_ENABLE |
3280 PORTB_HOTPLUG_ENABLE |
3281 PORTC_HOTPLUG_ENABLE;
3282
3283 drm_dbg_kms(&dev_priv->drm,
3284 "Invert bit setting: hp_ctl:%x hp_port:%x\n",
3285 hotplug, enabled_irqs);
3286 hotplug &= ~BXT_DDI_HPD_INVERT_MASK;
3287
3288 /*
3289 * For BXT invert bit has to be set based on AOB design
3290 * for HPD detection logic, update it based on VBT fields.
3291 */
3292 if ((enabled_irqs & BXT_DE_PORT_HP_DDIA) &&
3293 intel_bios_is_port_hpd_inverted(dev_priv, PORT_A))
3294 hotplug |= BXT_DDIA_HPD_INVERT;
3295 if ((enabled_irqs & BXT_DE_PORT_HP_DDIB) &&
3296 intel_bios_is_port_hpd_inverted(dev_priv, PORT_B))
3297 hotplug |= BXT_DDIB_HPD_INVERT;
3298 if ((enabled_irqs & BXT_DE_PORT_HP_DDIC) &&
3299 intel_bios_is_port_hpd_inverted(dev_priv, PORT_C))
3300 hotplug |= BXT_DDIC_HPD_INVERT;
3301
3302 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3303}
3304
3305static void bxt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3306{
3307 __bxt_hpd_detection_setup(dev_priv, BXT_DE_PORT_HOTPLUG_MASK);
3308}
3309
3310static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3311{
3312 u32 hotplug_irqs, enabled_irqs;
3313
3314 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, dev_priv->hotplug.hpd);
3315 hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK;
3316
3317 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3318
3319 __bxt_hpd_detection_setup(dev_priv, enabled_irqs);
3320}
3321
3322static void ibx_irq_postinstall(struct drm_i915_private *dev_priv)
3323{
3324 u32 mask;
3325
3326 if (HAS_PCH_NOP(dev_priv))
3327 return;
3328
3329 if (HAS_PCH_IBX(dev_priv))
3330 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
3331 else if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
3332 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
3333 else
3334 mask = SDE_GMBUS_CPT;
3335
3336 gen3_assert_iir_is_zero(&dev_priv->uncore, SDEIIR);
3337 I915_WRITE(SDEIMR, ~mask);
3338
3339 if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv) ||
3340 HAS_PCH_LPT(dev_priv))
3341 ibx_hpd_detection_setup(dev_priv);
3342 else
3343 spt_hpd_detection_setup(dev_priv);
3344}
3345
3346static void ilk_irq_postinstall(struct drm_i915_private *dev_priv)
3347{
3348 struct intel_uncore *uncore = &dev_priv->uncore;
3349 u32 display_mask, extra_mask;
3350
3351 if (INTEL_GEN(dev_priv) >= 7) {
3352 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
3353 DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB);
3354 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
3355 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
3356 DE_DP_A_HOTPLUG_IVB);
3357 } else {
3358 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
3359 DE_AUX_CHANNEL_A | DE_PIPEB_CRC_DONE |
3360 DE_PIPEA_CRC_DONE | DE_POISON);
3361 extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
3362 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
3363 DE_DP_A_HOTPLUG);
3364 }
3365
3366 if (IS_HASWELL(dev_priv)) {
3367 gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
3368 display_mask |= DE_EDP_PSR_INT_HSW;
3369 }
3370
3371 dev_priv->irq_mask = ~display_mask;
3372
3373 ibx_irq_pre_postinstall(dev_priv);
3374
3375 GEN3_IRQ_INIT(uncore, DE, dev_priv->irq_mask,
3376 display_mask | extra_mask);
3377
3378 gen5_gt_irq_postinstall(&dev_priv->gt);
3379
3380 ilk_hpd_detection_setup(dev_priv);
3381
3382 ibx_irq_postinstall(dev_priv);
3383
3384 if (IS_IRONLAKE_M(dev_priv)) {
3385 /* Enable PCU event interrupts
3386 *
3387 * spinlocking not required here for correctness since interrupt
3388 * setup is guaranteed to run in single-threaded context. But we
3389 * need it to make the assert_spin_locked happy. */
3390 spin_lock_irq(&dev_priv->irq_lock);
3391 ilk_enable_display_irq(dev_priv, DE_PCU_EVENT);
3392 spin_unlock_irq(&dev_priv->irq_lock);
3393 }
3394}
3395
3396void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
3397{
3398 lockdep_assert_held(&dev_priv->irq_lock);
3399
3400 if (dev_priv->display_irqs_enabled)
3401 return;
3402
3403 dev_priv->display_irqs_enabled = true;
3404
3405 if (intel_irqs_enabled(dev_priv)) {
3406 vlv_display_irq_reset(dev_priv);
3407 vlv_display_irq_postinstall(dev_priv);
3408 }
3409}
3410
3411void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
3412{
3413 lockdep_assert_held(&dev_priv->irq_lock);
3414
3415 if (!dev_priv->display_irqs_enabled)
3416 return;
3417
3418 dev_priv->display_irqs_enabled = false;
3419
3420 if (intel_irqs_enabled(dev_priv))
3421 vlv_display_irq_reset(dev_priv);
3422}
3423
3424
3425static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv)
3426{
3427 gen5_gt_irq_postinstall(&dev_priv->gt);
3428
3429 spin_lock_irq(&dev_priv->irq_lock);
3430 if (dev_priv->display_irqs_enabled)
3431 vlv_display_irq_postinstall(dev_priv);
3432 spin_unlock_irq(&dev_priv->irq_lock);
3433
3434 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3435 POSTING_READ(VLV_MASTER_IER);
3436}
3437
3438static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
3439{
3440 struct intel_uncore *uncore = &dev_priv->uncore;
3441
3442 u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) |
3443 GEN8_PIPE_CDCLK_CRC_DONE;
3444 u32 de_pipe_enables;
3445 u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
3446 u32 de_port_enables;
3447 u32 de_misc_masked = GEN8_DE_EDP_PSR;
3448 u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
3449 BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
3450 enum pipe pipe;
3451
3452 if (INTEL_GEN(dev_priv) <= 10)
3453 de_misc_masked |= GEN8_DE_MISC_GSE;
3454
3455 if (IS_GEN9_LP(dev_priv))
3456 de_port_masked |= BXT_DE_PORT_GMBUS;
3457
3458 de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
3459 GEN8_PIPE_FIFO_UNDERRUN;
3460
3461 de_port_enables = de_port_masked;
3462 if (IS_GEN9_LP(dev_priv))
3463 de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
3464 else if (IS_BROADWELL(dev_priv))
3465 de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
3466
3467 if (INTEL_GEN(dev_priv) >= 12) {
3468 enum transcoder trans;
3469
3470 for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
3471 enum intel_display_power_domain domain;
3472
3473 domain = POWER_DOMAIN_TRANSCODER(trans);
3474 if (!intel_display_power_is_enabled(dev_priv, domain))
3475 continue;
3476
3477 gen3_assert_iir_is_zero(uncore, TRANS_PSR_IIR(trans));
3478 }
3479 } else {
3480 gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
3481 }
3482
3483 for_each_pipe(dev_priv, pipe) {
3484 dev_priv->de_irq_mask[pipe] = ~de_pipe_masked;
3485
3486 if (intel_display_power_is_enabled(dev_priv,
3487 POWER_DOMAIN_PIPE(pipe)))
3488 GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
3489 dev_priv->de_irq_mask[pipe],
3490 de_pipe_enables);
3491 }
3492
3493 GEN3_IRQ_INIT(uncore, GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
3494 GEN3_IRQ_INIT(uncore, GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);
3495
3496 if (INTEL_GEN(dev_priv) >= 11) {
3497 u32 de_hpd_masked = 0;
3498 u32 de_hpd_enables = GEN11_DE_TC_HOTPLUG_MASK |
3499 GEN11_DE_TBT_HOTPLUG_MASK;
3500
3501 GEN3_IRQ_INIT(uncore, GEN11_DE_HPD_, ~de_hpd_masked,
3502 de_hpd_enables);
3503 gen11_hpd_detection_setup(dev_priv);
3504 } else if (IS_GEN9_LP(dev_priv)) {
3505 bxt_hpd_detection_setup(dev_priv);
3506 } else if (IS_BROADWELL(dev_priv)) {
3507 ilk_hpd_detection_setup(dev_priv);
3508 }
3509}
3510
3511static void gen8_irq_postinstall(struct drm_i915_private *dev_priv)
3512{
3513 if (HAS_PCH_SPLIT(dev_priv))
3514 ibx_irq_pre_postinstall(dev_priv);
3515
3516 gen8_gt_irq_postinstall(&dev_priv->gt);
3517 gen8_de_irq_postinstall(dev_priv);
3518
3519 if (HAS_PCH_SPLIT(dev_priv))
3520 ibx_irq_postinstall(dev_priv);
3521
3522 gen8_master_intr_enable(dev_priv->uncore.regs);
3523}
3524
3525static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
3526{
3527 u32 mask = SDE_GMBUS_ICP;
3528
3529 drm_WARN_ON(&dev_priv->drm, I915_READ(SDEIER) != 0);
3530 I915_WRITE(SDEIER, 0xffffffff);
3531 POSTING_READ(SDEIER);
3532
3533 gen3_assert_iir_is_zero(&dev_priv->uncore, SDEIIR);
3534 I915_WRITE(SDEIMR, ~mask);
3535
3536 if (HAS_PCH_TGP(dev_priv))
3537 icp_hpd_detection_setup(dev_priv, TGP_DDI_HPD_ENABLE_MASK,
3538 TGP_TC_HPD_ENABLE_MASK);
3539 else if (HAS_PCH_JSP(dev_priv))
3540 icp_hpd_detection_setup(dev_priv, TGP_DDI_HPD_ENABLE_MASK, 0);
3541 else if (HAS_PCH_MCC(dev_priv))
3542 icp_hpd_detection_setup(dev_priv, ICP_DDI_HPD_ENABLE_MASK,
3543 ICP_TC_HPD_ENABLE(PORT_TC1));
3544 else
3545 icp_hpd_detection_setup(dev_priv, ICP_DDI_HPD_ENABLE_MASK,
3546 ICP_TC_HPD_ENABLE_MASK);
3547}
3548
3549static void gen11_irq_postinstall(struct drm_i915_private *dev_priv)
3550{
3551 struct intel_uncore *uncore = &dev_priv->uncore;
3552 u32 gu_misc_masked = GEN11_GU_MISC_GSE;
3553
3554 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
3555 icp_irq_postinstall(dev_priv);
3556
3557 gen11_gt_irq_postinstall(&dev_priv->gt);
3558 gen8_de_irq_postinstall(dev_priv);
3559
3560 GEN3_IRQ_INIT(uncore, GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked);
3561
3562 I915_WRITE(GEN11_DISPLAY_INT_CTL, GEN11_DISPLAY_IRQ_ENABLE);
3563
3564 if (HAS_MASTER_UNIT_IRQ(dev_priv)) {
3565 dg1_master_intr_enable(uncore->regs);
3566 POSTING_READ(DG1_MSTR_UNIT_INTR);
3567 } else {
3568 gen11_master_intr_enable(uncore->regs);
3569 POSTING_READ(GEN11_GFX_MSTR_IRQ);
3570 }
3571}
3572
3573static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv)
3574{
3575 gen8_gt_irq_postinstall(&dev_priv->gt);
3576
3577 spin_lock_irq(&dev_priv->irq_lock);
3578 if (dev_priv->display_irqs_enabled)
3579 vlv_display_irq_postinstall(dev_priv);
3580 spin_unlock_irq(&dev_priv->irq_lock);
3581
3582 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
3583 POSTING_READ(GEN8_MASTER_IRQ);
3584}
3585
3586static void i8xx_irq_reset(struct drm_i915_private *dev_priv)
3587{
3588 struct intel_uncore *uncore = &dev_priv->uncore;
3589
3590 i9xx_pipestat_irq_reset(dev_priv);
3591
3592 GEN2_IRQ_RESET(uncore);
3593}
3594
3595static void i8xx_irq_postinstall(struct drm_i915_private *dev_priv)
3596{
3597 struct intel_uncore *uncore = &dev_priv->uncore;
3598 u16 enable_mask;
3599
3600 intel_uncore_write16(uncore,
3601 EMR,
3602 ~(I915_ERROR_PAGE_TABLE |
3603 I915_ERROR_MEMORY_REFRESH));
3604
3605 /* Unmask the interrupts that we always want on. */
3606 dev_priv->irq_mask =
3607 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3608 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3609 I915_MASTER_ERROR_INTERRUPT);
3610
3611 enable_mask =
3612 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3613 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3614 I915_MASTER_ERROR_INTERRUPT |
3615 I915_USER_INTERRUPT;
3616
3617 GEN2_IRQ_INIT(uncore, dev_priv->irq_mask, enable_mask);
3618
3619 /* Interrupt setup is already guaranteed to be single-threaded, this is
3620 * just to make the assert_spin_locked check happy. */
3621 spin_lock_irq(&dev_priv->irq_lock);
3622 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3623 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3624 spin_unlock_irq(&dev_priv->irq_lock);
3625}
3626
3627static void i8xx_error_irq_ack(struct drm_i915_private *i915,
3628 u16 *eir, u16 *eir_stuck)
3629{
3630 struct intel_uncore *uncore = &i915->uncore;
3631 u16 emr;
3632
3633 *eir = intel_uncore_read16(uncore, EIR);
3634
3635 if (*eir)
3636 intel_uncore_write16(uncore, EIR, *eir);
3637
3638 *eir_stuck = intel_uncore_read16(uncore, EIR);
3639 if (*eir_stuck == 0)
3640 return;
3641
3642 /*
3643 * Toggle all EMR bits to make sure we get an edge
3644 * in the ISR master error bit if we don't clear
3645 * all the EIR bits. Otherwise the edge triggered
3646 * IIR on i965/g4x wouldn't notice that an interrupt
3647 * is still pending. Also some EIR bits can't be
3648 * cleared except by handling the underlying error
3649 * (or by a GPU reset) so we mask any bit that
3650 * remains set.
3651 */
3652 emr = intel_uncore_read16(uncore, EMR);
3653 intel_uncore_write16(uncore, EMR, 0xffff);
3654 intel_uncore_write16(uncore, EMR, emr | *eir_stuck);
3655}
3656
3657static void i8xx_error_irq_handler(struct drm_i915_private *dev_priv,
3658 u16 eir, u16 eir_stuck)
3659{
3660 DRM_DEBUG("Master Error: EIR 0x%04x\n", eir);
3661
3662 if (eir_stuck)
3663 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%04x, masked\n",
3664 eir_stuck);
3665}
3666
3667static void i9xx_error_irq_ack(struct drm_i915_private *dev_priv,
3668 u32 *eir, u32 *eir_stuck)
3669{
3670 u32 emr;
3671
3672 *eir = I915_READ(EIR);
3673
3674 I915_WRITE(EIR, *eir);
3675
3676 *eir_stuck = I915_READ(EIR);
3677 if (*eir_stuck == 0)
3678 return;
3679
3680 /*
3681 * Toggle all EMR bits to make sure we get an edge
3682 * in the ISR master error bit if we don't clear
3683 * all the EIR bits. Otherwise the edge triggered
3684 * IIR on i965/g4x wouldn't notice that an interrupt
3685 * is still pending. Also some EIR bits can't be
3686 * cleared except by handling the underlying error
3687 * (or by a GPU reset) so we mask any bit that
3688 * remains set.
3689 */
3690 emr = I915_READ(EMR);
3691 I915_WRITE(EMR, 0xffffffff);
3692 I915_WRITE(EMR, emr | *eir_stuck);
3693}
3694
3695static void i9xx_error_irq_handler(struct drm_i915_private *dev_priv,
3696 u32 eir, u32 eir_stuck)
3697{
3698 DRM_DEBUG("Master Error, EIR 0x%08x\n", eir);
3699
3700 if (eir_stuck)
3701 drm_dbg(&dev_priv->drm, "EIR stuck: 0x%08x, masked\n",
3702 eir_stuck);
3703}
3704
3705static irqreturn_t i8xx_irq_handler(int irq, void *arg)
3706{
3707 struct drm_i915_private *dev_priv = arg;
3708 irqreturn_t ret = IRQ_NONE;
3709
3710 if (!intel_irqs_enabled(dev_priv))
3711 return IRQ_NONE;
3712
3713 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
3714 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3715
3716 do {
3717 u32 pipe_stats[I915_MAX_PIPES] = {};
3718 u16 eir = 0, eir_stuck = 0;
3719 u16 iir;
3720
3721 iir = intel_uncore_read16(&dev_priv->uncore, GEN2_IIR);
3722 if (iir == 0)
3723 break;
3724
3725 ret = IRQ_HANDLED;
3726
3727 /* Call regardless, as some status bits might not be
3728 * signalled in iir */
3729 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
3730
3731 if (iir & I915_MASTER_ERROR_INTERRUPT)
3732 i8xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
3733
3734 intel_uncore_write16(&dev_priv->uncore, GEN2_IIR, iir);
3735
3736 if (iir & I915_USER_INTERRUPT)
3737 intel_engine_signal_breadcrumbs(dev_priv->gt.engine[RCS0]);
3738
3739 if (iir & I915_MASTER_ERROR_INTERRUPT)
3740 i8xx_error_irq_handler(dev_priv, eir, eir_stuck);
3741
3742 i8xx_pipestat_irq_handler(dev_priv, iir, pipe_stats);
3743 } while (0);
3744
3745 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3746
3747 return ret;
3748}
3749
3750static void i915_irq_reset(struct drm_i915_private *dev_priv)
3751{
3752 struct intel_uncore *uncore = &dev_priv->uncore;
3753
3754 if (I915_HAS_HOTPLUG(dev_priv)) {
3755 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
3756 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3757 }
3758
3759 i9xx_pipestat_irq_reset(dev_priv);
3760
3761 GEN3_IRQ_RESET(uncore, GEN2_);
3762}
3763
3764static void i915_irq_postinstall(struct drm_i915_private *dev_priv)
3765{
3766 struct intel_uncore *uncore = &dev_priv->uncore;
3767 u32 enable_mask;
3768
3769 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE |
3770 I915_ERROR_MEMORY_REFRESH));
3771
3772 /* Unmask the interrupts that we always want on. */
3773 dev_priv->irq_mask =
3774 ~(I915_ASLE_INTERRUPT |
3775 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3776 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3777 I915_MASTER_ERROR_INTERRUPT);
3778
3779 enable_mask =
3780 I915_ASLE_INTERRUPT |
3781 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3782 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3783 I915_MASTER_ERROR_INTERRUPT |
3784 I915_USER_INTERRUPT;
3785
3786 if (I915_HAS_HOTPLUG(dev_priv)) {
3787 /* Enable in IER... */
3788 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3789 /* and unmask in IMR */
3790 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3791 }
3792
3793 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask);
3794
3795 /* Interrupt setup is already guaranteed to be single-threaded, this is
3796 * just to make the assert_spin_locked check happy. */
3797 spin_lock_irq(&dev_priv->irq_lock);
3798 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3799 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3800 spin_unlock_irq(&dev_priv->irq_lock);
3801
3802 i915_enable_asle_pipestat(dev_priv);
3803}
3804
3805static irqreturn_t i915_irq_handler(int irq, void *arg)
3806{
3807 struct drm_i915_private *dev_priv = arg;
3808 irqreturn_t ret = IRQ_NONE;
3809
3810 if (!intel_irqs_enabled(dev_priv))
3811 return IRQ_NONE;
3812
3813 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
3814 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3815
3816 do {
3817 u32 pipe_stats[I915_MAX_PIPES] = {};
3818 u32 eir = 0, eir_stuck = 0;
3819 u32 hotplug_status = 0;
3820 u32 iir;
3821
3822 iir = I915_READ(GEN2_IIR);
3823 if (iir == 0)
3824 break;
3825
3826 ret = IRQ_HANDLED;
3827
3828 if (I915_HAS_HOTPLUG(dev_priv) &&
3829 iir & I915_DISPLAY_PORT_INTERRUPT)
3830 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
3831
3832 /* Call regardless, as some status bits might not be
3833 * signalled in iir */
3834 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
3835
3836 if (iir & I915_MASTER_ERROR_INTERRUPT)
3837 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
3838
3839 I915_WRITE(GEN2_IIR, iir);
3840
3841 if (iir & I915_USER_INTERRUPT)
3842 intel_engine_signal_breadcrumbs(dev_priv->gt.engine[RCS0]);
3843
3844 if (iir & I915_MASTER_ERROR_INTERRUPT)
3845 i9xx_error_irq_handler(dev_priv, eir, eir_stuck);
3846
3847 if (hotplug_status)
3848 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
3849
3850 i915_pipestat_irq_handler(dev_priv, iir, pipe_stats);
3851 } while (0);
3852
3853 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3854
3855 return ret;
3856}
3857
3858static void i965_irq_reset(struct drm_i915_private *dev_priv)
3859{
3860 struct intel_uncore *uncore = &dev_priv->uncore;
3861
3862 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
3863 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3864
3865 i9xx_pipestat_irq_reset(dev_priv);
3866
3867 GEN3_IRQ_RESET(uncore, GEN2_);
3868}
3869
3870static void i965_irq_postinstall(struct drm_i915_private *dev_priv)
3871{
3872 struct intel_uncore *uncore = &dev_priv->uncore;
3873 u32 enable_mask;
3874 u32 error_mask;
3875
3876 /*
3877 * Enable some error detection, note the instruction error mask
3878 * bit is reserved, so we leave it masked.
3879 */
3880 if (IS_G4X(dev_priv)) {
3881 error_mask = ~(GM45_ERROR_PAGE_TABLE |
3882 GM45_ERROR_MEM_PRIV |
3883 GM45_ERROR_CP_PRIV |
3884 I915_ERROR_MEMORY_REFRESH);
3885 } else {
3886 error_mask = ~(I915_ERROR_PAGE_TABLE |
3887 I915_ERROR_MEMORY_REFRESH);
3888 }
3889 I915_WRITE(EMR, error_mask);
3890
3891 /* Unmask the interrupts that we always want on. */
3892 dev_priv->irq_mask =
3893 ~(I915_ASLE_INTERRUPT |
3894 I915_DISPLAY_PORT_INTERRUPT |
3895 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3896 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3897 I915_MASTER_ERROR_INTERRUPT);
3898
3899 enable_mask =
3900 I915_ASLE_INTERRUPT |
3901 I915_DISPLAY_PORT_INTERRUPT |
3902 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3903 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3904 I915_MASTER_ERROR_INTERRUPT |
3905 I915_USER_INTERRUPT;
3906
3907 if (IS_G4X(dev_priv))
3908 enable_mask |= I915_BSD_USER_INTERRUPT;
3909
3910 GEN3_IRQ_INIT(uncore, GEN2_, dev_priv->irq_mask, enable_mask);
3911
3912 /* Interrupt setup is already guaranteed to be single-threaded, this is
3913 * just to make the assert_spin_locked check happy. */
3914 spin_lock_irq(&dev_priv->irq_lock);
3915 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3916 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3917 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3918 spin_unlock_irq(&dev_priv->irq_lock);
3919
3920 i915_enable_asle_pipestat(dev_priv);
3921}
3922
3923static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv)
3924{
3925 u32 hotplug_en;
3926
3927 lockdep_assert_held(&dev_priv->irq_lock);
3928
3929 /* Note HDMI and DP share hotplug bits */
3930 /* enable bits are the same for all generations */
3931 hotplug_en = intel_hpd_enabled_irqs(dev_priv, hpd_mask_i915);
3932 /* Programming the CRT detection parameters tends
3933 to generate a spurious hotplug event about three
3934 seconds later. So just do it once.
3935 */
3936 if (IS_G4X(dev_priv))
3937 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3938 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3939
3940 /* Ignore TV since it's buggy */
3941 i915_hotplug_interrupt_update_locked(dev_priv,
3942 HOTPLUG_INT_EN_MASK |
3943 CRT_HOTPLUG_VOLTAGE_COMPARE_MASK |
3944 CRT_HOTPLUG_ACTIVATION_PERIOD_64,
3945 hotplug_en);
3946}
3947
3948static irqreturn_t i965_irq_handler(int irq, void *arg)
3949{
3950 struct drm_i915_private *dev_priv = arg;
3951 irqreturn_t ret = IRQ_NONE;
3952
3953 if (!intel_irqs_enabled(dev_priv))
3954 return IRQ_NONE;
3955
3956 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
3957 disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3958
3959 do {
3960 u32 pipe_stats[I915_MAX_PIPES] = {};
3961 u32 eir = 0, eir_stuck = 0;
3962 u32 hotplug_status = 0;
3963 u32 iir;
3964
3965 iir = I915_READ(GEN2_IIR);
3966 if (iir == 0)
3967 break;
3968
3969 ret = IRQ_HANDLED;
3970
3971 if (iir & I915_DISPLAY_PORT_INTERRUPT)
3972 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
3973
3974 /* Call regardless, as some status bits might not be
3975 * signalled in iir */
3976 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
3977
3978 if (iir & I915_MASTER_ERROR_INTERRUPT)
3979 i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
3980
3981 I915_WRITE(GEN2_IIR, iir);
3982
3983 if (iir & I915_USER_INTERRUPT)
3984 intel_engine_signal_breadcrumbs(dev_priv->gt.engine[RCS0]);
3985
3986 if (iir & I915_BSD_USER_INTERRUPT)
3987 intel_engine_signal_breadcrumbs(dev_priv->gt.engine[VCS0]);
3988
3989 if (iir & I915_MASTER_ERROR_INTERRUPT)
3990 i9xx_error_irq_handler(dev_priv, eir, eir_stuck);
3991
3992 if (hotplug_status)
3993 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
3994
3995 i965_pipestat_irq_handler(dev_priv, iir, pipe_stats);
3996 } while (0);
3997
3998 enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
3999
4000 return ret;
4001}
4002
4003/**
4004 * intel_irq_init - initializes irq support
4005 * @dev_priv: i915 device instance
4006 *
4007 * This function initializes all the irq support including work items, timers
4008 * and all the vtables. It does not setup the interrupt itself though.
4009 */
4010void intel_irq_init(struct drm_i915_private *dev_priv)
4011{
4012 struct drm_device *dev = &dev_priv->drm;
4013 int i;
4014
4015 intel_hpd_init_pins(dev_priv);
4016
4017 intel_hpd_init_work(dev_priv);
4018
4019 INIT_WORK(&dev_priv->l3_parity.error_work, ivb_parity_work);
4020 for (i = 0; i < MAX_L3_SLICES; ++i)
4021 dev_priv->l3_parity.remap_info[i] = NULL;
4022
4023 /* pre-gen11 the guc irqs bits are in the upper 16 bits of the pm reg */
4024 if (HAS_GT_UC(dev_priv) && INTEL_GEN(dev_priv) < 11)
4025 dev_priv->gt.pm_guc_events = GUC_INTR_GUC2HOST << 16;
4026
4027 dev->vblank_disable_immediate = true;
4028
4029 /* Most platforms treat the display irq block as an always-on
4030 * power domain. vlv/chv can disable it at runtime and need
4031 * special care to avoid writing any of the display block registers
4032 * outside of the power domain. We defer setting up the display irqs
4033 * in this case to the runtime pm.
4034 */
4035 dev_priv->display_irqs_enabled = true;
4036 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
4037 dev_priv->display_irqs_enabled = false;
4038
4039 dev_priv->hotplug.hpd_storm_threshold = HPD_STORM_DEFAULT_THRESHOLD;
4040 /* If we have MST support, we want to avoid doing short HPD IRQ storm
4041 * detection, as short HPD storms will occur as a natural part of
4042 * sideband messaging with MST.
4043 * On older platforms however, IRQ storms can occur with both long and
4044 * short pulses, as seen on some G4x systems.
4045 */
4046 dev_priv->hotplug.hpd_short_storm_enabled = !HAS_DP_MST(dev_priv);
4047
4048 if (HAS_GMCH(dev_priv)) {
4049 if (I915_HAS_HOTPLUG(dev_priv))
4050 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4051 } else {
4052 if (HAS_PCH_JSP(dev_priv))
4053 dev_priv->display.hpd_irq_setup = jsp_hpd_irq_setup;
4054 else if (HAS_PCH_MCC(dev_priv))
4055 dev_priv->display.hpd_irq_setup = mcc_hpd_irq_setup;
4056 else if (INTEL_GEN(dev_priv) >= 11)
4057 dev_priv->display.hpd_irq_setup = gen11_hpd_irq_setup;
4058 else if (IS_GEN9_LP(dev_priv))
4059 dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
4060 else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT)
4061 dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
4062 else
4063 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4064 }
4065}
4066
4067/**
4068 * intel_irq_fini - deinitializes IRQ support
4069 * @i915: i915 device instance
4070 *
4071 * This function deinitializes all the IRQ support.
4072 */
4073void intel_irq_fini(struct drm_i915_private *i915)
4074{
4075 int i;
4076
4077 for (i = 0; i < MAX_L3_SLICES; ++i)
4078 kfree(i915->l3_parity.remap_info[i]);
4079}
4080
4081static irq_handler_t intel_irq_handler(struct drm_i915_private *dev_priv)
4082{
4083 if (HAS_GMCH(dev_priv)) {
4084 if (IS_CHERRYVIEW(dev_priv))
4085 return cherryview_irq_handler;
4086 else if (IS_VALLEYVIEW(dev_priv))
4087 return valleyview_irq_handler;
4088 else if (IS_GEN(dev_priv, 4))
4089 return i965_irq_handler;
4090 else if (IS_GEN(dev_priv, 3))
4091 return i915_irq_handler;
4092 else
4093 return i8xx_irq_handler;
4094 } else {
4095 if (HAS_MASTER_UNIT_IRQ(dev_priv))
4096 return dg1_irq_handler;
4097 if (INTEL_GEN(dev_priv) >= 11)
4098 return gen11_irq_handler;
4099 else if (INTEL_GEN(dev_priv) >= 8)
4100 return gen8_irq_handler;
4101 else
4102 return ilk_irq_handler;
4103 }
4104}
4105
4106static void intel_irq_reset(struct drm_i915_private *dev_priv)
4107{
4108 if (HAS_GMCH(dev_priv)) {
4109 if (IS_CHERRYVIEW(dev_priv))
4110 cherryview_irq_reset(dev_priv);
4111 else if (IS_VALLEYVIEW(dev_priv))
4112 valleyview_irq_reset(dev_priv);
4113 else if (IS_GEN(dev_priv, 4))
4114 i965_irq_reset(dev_priv);
4115 else if (IS_GEN(dev_priv, 3))
4116 i915_irq_reset(dev_priv);
4117 else
4118 i8xx_irq_reset(dev_priv);
4119 } else {
4120 if (INTEL_GEN(dev_priv) >= 11)
4121 gen11_irq_reset(dev_priv);
4122 else if (INTEL_GEN(dev_priv) >= 8)
4123 gen8_irq_reset(dev_priv);
4124 else
4125 ilk_irq_reset(dev_priv);
4126 }
4127}
4128
4129static void intel_irq_postinstall(struct drm_i915_private *dev_priv)
4130{
4131 if (HAS_GMCH(dev_priv)) {
4132 if (IS_CHERRYVIEW(dev_priv))
4133 cherryview_irq_postinstall(dev_priv);
4134 else if (IS_VALLEYVIEW(dev_priv))
4135 valleyview_irq_postinstall(dev_priv);
4136 else if (IS_GEN(dev_priv, 4))
4137 i965_irq_postinstall(dev_priv);
4138 else if (IS_GEN(dev_priv, 3))
4139 i915_irq_postinstall(dev_priv);
4140 else
4141 i8xx_irq_postinstall(dev_priv);
4142 } else {
4143 if (INTEL_GEN(dev_priv) >= 11)
4144 gen11_irq_postinstall(dev_priv);
4145 else if (INTEL_GEN(dev_priv) >= 8)
4146 gen8_irq_postinstall(dev_priv);
4147 else
4148 ilk_irq_postinstall(dev_priv);
4149 }
4150}
4151
4152/**
4153 * intel_irq_install - enables the hardware interrupt
4154 * @dev_priv: i915 device instance
4155 *
4156 * This function enables the hardware interrupt handling, but leaves the hotplug
4157 * handling still disabled. It is called after intel_irq_init().
4158 *
4159 * In the driver load and resume code we need working interrupts in a few places
4160 * but don't want to deal with the hassle of concurrent probe and hotplug
4161 * workers. Hence the split into this two-stage approach.
4162 */
4163int intel_irq_install(struct drm_i915_private *dev_priv)
4164{
4165 int irq = dev_priv->drm.pdev->irq;
4166 int ret;
4167
4168 /*
4169 * We enable some interrupt sources in our postinstall hooks, so mark
4170 * interrupts as enabled _before_ actually enabling them to avoid
4171 * special cases in our ordering checks.
4172 */
4173 dev_priv->runtime_pm.irqs_enabled = true;
4174
4175 dev_priv->drm.irq_enabled = true;
4176
4177 intel_irq_reset(dev_priv);
4178
4179 ret = request_irq(irq, intel_irq_handler(dev_priv),
4180 IRQF_SHARED, DRIVER_NAME, dev_priv);
4181 if (ret < 0) {
4182 dev_priv->drm.irq_enabled = false;
4183 return ret;
4184 }
4185
4186 intel_irq_postinstall(dev_priv);
4187
4188 return ret;
4189}
4190
4191/**
4192 * intel_irq_uninstall - finilizes all irq handling
4193 * @dev_priv: i915 device instance
4194 *
4195 * This stops interrupt and hotplug handling and unregisters and frees all
4196 * resources acquired in the init functions.
4197 */
4198void intel_irq_uninstall(struct drm_i915_private *dev_priv)
4199{
4200 int irq = dev_priv->drm.pdev->irq;
4201
4202 /*
4203 * FIXME we can get called twice during driver probe
4204 * error handling as well as during driver remove due to
4205 * intel_modeset_driver_remove() calling us out of sequence.
4206 * Would be nice if it didn't do that...
4207 */
4208 if (!dev_priv->drm.irq_enabled)
4209 return;
4210
4211 dev_priv->drm.irq_enabled = false;
4212
4213 intel_irq_reset(dev_priv);
4214
4215 free_irq(irq, dev_priv);
4216
4217 intel_hpd_cancel_work(dev_priv);
4218 dev_priv->runtime_pm.irqs_enabled = false;
4219}
4220
4221/**
4222 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4223 * @dev_priv: i915 device instance
4224 *
4225 * This function is used to disable interrupts at runtime, both in the runtime
4226 * pm and the system suspend/resume code.
4227 */
4228void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
4229{
4230 intel_irq_reset(dev_priv);
4231 dev_priv->runtime_pm.irqs_enabled = false;
4232 intel_synchronize_irq(dev_priv);
4233}
4234
4235/**
4236 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4237 * @dev_priv: i915 device instance
4238 *
4239 * This function is used to enable interrupts at runtime, both in the runtime
4240 * pm and the system suspend/resume code.
4241 */
4242void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
4243{
4244 dev_priv->runtime_pm.irqs_enabled = true;
4245 intel_irq_reset(dev_priv);
4246 intel_irq_postinstall(dev_priv);
4247}
4248
4249bool intel_irqs_enabled(struct drm_i915_private *dev_priv)
4250{
4251 /*
4252 * We only use drm_irq_uninstall() at unload and VT switch, so
4253 * this is the only thing we need to check.
4254 */
4255 return dev_priv->runtime_pm.irqs_enabled;
4256}
4257
4258void intel_synchronize_irq(struct drm_i915_private *i915)
4259{
4260 synchronize_irq(i915->drm.pdev->irq);
4261}