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1// SPDX-License-Identifier: GPL-2.0-only
2/**************************************************************************
3 * Copyright (c) 2007, Intel Corporation.
4 * All Rights Reserved.
5 *
6 * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
7 * develop this driver.
8 *
9 **************************************************************************/
10
11#include <drm/drm_vblank.h>
12
13#include "mdfld_output.h"
14#include "power.h"
15#include "psb_drv.h"
16#include "psb_intel_reg.h"
17#include "psb_irq.h"
18#include "psb_reg.h"
19
20/*
21 * inline functions
22 */
23
24static inline u32
25psb_pipestat(int pipe)
26{
27 if (pipe == 0)
28 return PIPEASTAT;
29 if (pipe == 1)
30 return PIPEBSTAT;
31 if (pipe == 2)
32 return PIPECSTAT;
33 BUG();
34}
35
36static inline u32
37mid_pipe_event(int pipe)
38{
39 if (pipe == 0)
40 return _PSB_PIPEA_EVENT_FLAG;
41 if (pipe == 1)
42 return _MDFLD_PIPEB_EVENT_FLAG;
43 if (pipe == 2)
44 return _MDFLD_PIPEC_EVENT_FLAG;
45 BUG();
46}
47
48static inline u32
49mid_pipe_vsync(int pipe)
50{
51 if (pipe == 0)
52 return _PSB_VSYNC_PIPEA_FLAG;
53 if (pipe == 1)
54 return _PSB_VSYNC_PIPEB_FLAG;
55 if (pipe == 2)
56 return _MDFLD_PIPEC_VBLANK_FLAG;
57 BUG();
58}
59
60static inline u32
61mid_pipeconf(int pipe)
62{
63 if (pipe == 0)
64 return PIPEACONF;
65 if (pipe == 1)
66 return PIPEBCONF;
67 if (pipe == 2)
68 return PIPECCONF;
69 BUG();
70}
71
72void
73psb_enable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
74{
75 if ((dev_priv->pipestat[pipe] & mask) != mask) {
76 u32 reg = psb_pipestat(pipe);
77 dev_priv->pipestat[pipe] |= mask;
78 /* Enable the interrupt, clear any pending status */
79 if (gma_power_begin(dev_priv->dev, false)) {
80 u32 writeVal = PSB_RVDC32(reg);
81 writeVal |= (mask | (mask >> 16));
82 PSB_WVDC32(writeVal, reg);
83 (void) PSB_RVDC32(reg);
84 gma_power_end(dev_priv->dev);
85 }
86 }
87}
88
89void
90psb_disable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
91{
92 if ((dev_priv->pipestat[pipe] & mask) != 0) {
93 u32 reg = psb_pipestat(pipe);
94 dev_priv->pipestat[pipe] &= ~mask;
95 if (gma_power_begin(dev_priv->dev, false)) {
96 u32 writeVal = PSB_RVDC32(reg);
97 writeVal &= ~mask;
98 PSB_WVDC32(writeVal, reg);
99 (void) PSB_RVDC32(reg);
100 gma_power_end(dev_priv->dev);
101 }
102 }
103}
104
105static void mid_enable_pipe_event(struct drm_psb_private *dev_priv, int pipe)
106{
107 if (gma_power_begin(dev_priv->dev, false)) {
108 u32 pipe_event = mid_pipe_event(pipe);
109 dev_priv->vdc_irq_mask |= pipe_event;
110 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
111 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
112 gma_power_end(dev_priv->dev);
113 }
114}
115
116static void mid_disable_pipe_event(struct drm_psb_private *dev_priv, int pipe)
117{
118 if (dev_priv->pipestat[pipe] == 0) {
119 if (gma_power_begin(dev_priv->dev, false)) {
120 u32 pipe_event = mid_pipe_event(pipe);
121 dev_priv->vdc_irq_mask &= ~pipe_event;
122 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
123 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
124 gma_power_end(dev_priv->dev);
125 }
126 }
127}
128
129/**
130 * Display controller interrupt handler for pipe event.
131 *
132 */
133static void mid_pipe_event_handler(struct drm_device *dev, int pipe)
134{
135 struct drm_psb_private *dev_priv =
136 (struct drm_psb_private *) dev->dev_private;
137
138 uint32_t pipe_stat_val = 0;
139 uint32_t pipe_stat_reg = psb_pipestat(pipe);
140 uint32_t pipe_enable = dev_priv->pipestat[pipe];
141 uint32_t pipe_status = dev_priv->pipestat[pipe] >> 16;
142 uint32_t pipe_clear;
143 uint32_t i = 0;
144
145 spin_lock(&dev_priv->irqmask_lock);
146
147 pipe_stat_val = PSB_RVDC32(pipe_stat_reg);
148 pipe_stat_val &= pipe_enable | pipe_status;
149 pipe_stat_val &= pipe_stat_val >> 16;
150
151 spin_unlock(&dev_priv->irqmask_lock);
152
153 /* Clear the 2nd level interrupt status bits
154 * Sometimes the bits are very sticky so we repeat until they unstick */
155 for (i = 0; i < 0xffff; i++) {
156 PSB_WVDC32(PSB_RVDC32(pipe_stat_reg), pipe_stat_reg);
157 pipe_clear = PSB_RVDC32(pipe_stat_reg) & pipe_status;
158
159 if (pipe_clear == 0)
160 break;
161 }
162
163 if (pipe_clear)
164 dev_err(dev->dev,
165 "%s, can't clear status bits for pipe %d, its value = 0x%x.\n",
166 __func__, pipe, PSB_RVDC32(pipe_stat_reg));
167
168 if (pipe_stat_val & PIPE_VBLANK_STATUS)
169 drm_handle_vblank(dev, pipe);
170
171 if (pipe_stat_val & PIPE_TE_STATUS)
172 drm_handle_vblank(dev, pipe);
173}
174
175/*
176 * Display controller interrupt handler.
177 */
178static void psb_vdc_interrupt(struct drm_device *dev, uint32_t vdc_stat)
179{
180 if (vdc_stat & _PSB_IRQ_ASLE)
181 psb_intel_opregion_asle_intr(dev);
182
183 if (vdc_stat & _PSB_VSYNC_PIPEA_FLAG)
184 mid_pipe_event_handler(dev, 0);
185
186 if (vdc_stat & _PSB_VSYNC_PIPEB_FLAG)
187 mid_pipe_event_handler(dev, 1);
188}
189
190/*
191 * SGX interrupt handler
192 */
193static void psb_sgx_interrupt(struct drm_device *dev, u32 stat_1, u32 stat_2)
194{
195 struct drm_psb_private *dev_priv = dev->dev_private;
196 u32 val, addr;
197 int error = false;
198
199 if (stat_1 & _PSB_CE_TWOD_COMPLETE)
200 val = PSB_RSGX32(PSB_CR_2D_BLIT_STATUS);
201
202 if (stat_2 & _PSB_CE2_BIF_REQUESTER_FAULT) {
203 val = PSB_RSGX32(PSB_CR_BIF_INT_STAT);
204 addr = PSB_RSGX32(PSB_CR_BIF_FAULT);
205 if (val) {
206 if (val & _PSB_CBI_STAT_PF_N_RW)
207 DRM_ERROR("SGX MMU page fault:");
208 else
209 DRM_ERROR("SGX MMU read / write protection fault:");
210
211 if (val & _PSB_CBI_STAT_FAULT_CACHE)
212 DRM_ERROR("\tCache requestor");
213 if (val & _PSB_CBI_STAT_FAULT_TA)
214 DRM_ERROR("\tTA requestor");
215 if (val & _PSB_CBI_STAT_FAULT_VDM)
216 DRM_ERROR("\tVDM requestor");
217 if (val & _PSB_CBI_STAT_FAULT_2D)
218 DRM_ERROR("\t2D requestor");
219 if (val & _PSB_CBI_STAT_FAULT_PBE)
220 DRM_ERROR("\tPBE requestor");
221 if (val & _PSB_CBI_STAT_FAULT_TSP)
222 DRM_ERROR("\tTSP requestor");
223 if (val & _PSB_CBI_STAT_FAULT_ISP)
224 DRM_ERROR("\tISP requestor");
225 if (val & _PSB_CBI_STAT_FAULT_USSEPDS)
226 DRM_ERROR("\tUSSEPDS requestor");
227 if (val & _PSB_CBI_STAT_FAULT_HOST)
228 DRM_ERROR("\tHost requestor");
229
230 DRM_ERROR("\tMMU failing address is 0x%08x.\n",
231 (unsigned int)addr);
232 error = true;
233 }
234 }
235
236 /* Clear bits */
237 PSB_WSGX32(stat_1, PSB_CR_EVENT_HOST_CLEAR);
238 PSB_WSGX32(stat_2, PSB_CR_EVENT_HOST_CLEAR2);
239 PSB_RSGX32(PSB_CR_EVENT_HOST_CLEAR2);
240}
241
242irqreturn_t psb_irq_handler(int irq, void *arg)
243{
244 struct drm_device *dev = arg;
245 struct drm_psb_private *dev_priv = dev->dev_private;
246 uint32_t vdc_stat, dsp_int = 0, sgx_int = 0, hotplug_int = 0;
247 u32 sgx_stat_1, sgx_stat_2;
248 int handled = 0;
249
250 spin_lock(&dev_priv->irqmask_lock);
251
252 vdc_stat = PSB_RVDC32(PSB_INT_IDENTITY_R);
253
254 if (vdc_stat & (_PSB_PIPE_EVENT_FLAG|_PSB_IRQ_ASLE))
255 dsp_int = 1;
256
257 /* FIXME: Handle Medfield
258 if (vdc_stat & _MDFLD_DISP_ALL_IRQ_FLAG)
259 dsp_int = 1;
260 */
261
262 if (vdc_stat & _PSB_IRQ_SGX_FLAG)
263 sgx_int = 1;
264 if (vdc_stat & _PSB_IRQ_DISP_HOTSYNC)
265 hotplug_int = 1;
266
267 vdc_stat &= dev_priv->vdc_irq_mask;
268 spin_unlock(&dev_priv->irqmask_lock);
269
270 if (dsp_int && gma_power_is_on(dev)) {
271 psb_vdc_interrupt(dev, vdc_stat);
272 handled = 1;
273 }
274
275 if (sgx_int) {
276 sgx_stat_1 = PSB_RSGX32(PSB_CR_EVENT_STATUS);
277 sgx_stat_2 = PSB_RSGX32(PSB_CR_EVENT_STATUS2);
278 psb_sgx_interrupt(dev, sgx_stat_1, sgx_stat_2);
279 handled = 1;
280 }
281
282 /* Note: this bit has other meanings on some devices, so we will
283 need to address that later if it ever matters */
284 if (hotplug_int && dev_priv->ops->hotplug) {
285 handled = dev_priv->ops->hotplug(dev);
286 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
287 }
288
289 PSB_WVDC32(vdc_stat, PSB_INT_IDENTITY_R);
290 (void) PSB_RVDC32(PSB_INT_IDENTITY_R);
291 rmb();
292
293 if (!handled)
294 return IRQ_NONE;
295
296 return IRQ_HANDLED;
297}
298
299void psb_irq_preinstall(struct drm_device *dev)
300{
301 struct drm_psb_private *dev_priv =
302 (struct drm_psb_private *) dev->dev_private;
303 unsigned long irqflags;
304
305 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
306
307 if (gma_power_is_on(dev)) {
308 PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
309 PSB_WVDC32(0x00000000, PSB_INT_MASK_R);
310 PSB_WVDC32(0x00000000, PSB_INT_ENABLE_R);
311 PSB_WSGX32(0x00000000, PSB_CR_EVENT_HOST_ENABLE);
312 PSB_RSGX32(PSB_CR_EVENT_HOST_ENABLE);
313 }
314 if (dev->vblank[0].enabled)
315 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEA_FLAG;
316 if (dev->vblank[1].enabled)
317 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEB_FLAG;
318
319 /* FIXME: Handle Medfield irq mask
320 if (dev->vblank[1].enabled)
321 dev_priv->vdc_irq_mask |= _MDFLD_PIPEB_EVENT_FLAG;
322 if (dev->vblank[2].enabled)
323 dev_priv->vdc_irq_mask |= _MDFLD_PIPEC_EVENT_FLAG;
324 */
325
326 /* Revisit this area - want per device masks ? */
327 if (dev_priv->ops->hotplug)
328 dev_priv->vdc_irq_mask |= _PSB_IRQ_DISP_HOTSYNC;
329 dev_priv->vdc_irq_mask |= _PSB_IRQ_ASLE | _PSB_IRQ_SGX_FLAG;
330
331 /* This register is safe even if display island is off */
332 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
333 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
334}
335
336int psb_irq_postinstall(struct drm_device *dev)
337{
338 struct drm_psb_private *dev_priv = dev->dev_private;
339 unsigned long irqflags;
340
341 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
342
343 /* Enable 2D and MMU fault interrupts */
344 PSB_WSGX32(_PSB_CE2_BIF_REQUESTER_FAULT, PSB_CR_EVENT_HOST_ENABLE2);
345 PSB_WSGX32(_PSB_CE_TWOD_COMPLETE, PSB_CR_EVENT_HOST_ENABLE);
346 PSB_RSGX32(PSB_CR_EVENT_HOST_ENABLE); /* Post */
347
348 /* This register is safe even if display island is off */
349 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
350 PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
351
352 if (dev->vblank[0].enabled)
353 psb_enable_pipestat(dev_priv, 0, PIPE_VBLANK_INTERRUPT_ENABLE);
354 else
355 psb_disable_pipestat(dev_priv, 0, PIPE_VBLANK_INTERRUPT_ENABLE);
356
357 if (dev->vblank[1].enabled)
358 psb_enable_pipestat(dev_priv, 1, PIPE_VBLANK_INTERRUPT_ENABLE);
359 else
360 psb_disable_pipestat(dev_priv, 1, PIPE_VBLANK_INTERRUPT_ENABLE);
361
362 if (dev->vblank[2].enabled)
363 psb_enable_pipestat(dev_priv, 2, PIPE_VBLANK_INTERRUPT_ENABLE);
364 else
365 psb_disable_pipestat(dev_priv, 2, PIPE_VBLANK_INTERRUPT_ENABLE);
366
367 if (dev_priv->ops->hotplug_enable)
368 dev_priv->ops->hotplug_enable(dev, true);
369
370 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
371 return 0;
372}
373
374void psb_irq_uninstall(struct drm_device *dev)
375{
376 struct drm_psb_private *dev_priv = dev->dev_private;
377 unsigned long irqflags;
378
379 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
380
381 if (dev_priv->ops->hotplug_enable)
382 dev_priv->ops->hotplug_enable(dev, false);
383
384 PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
385
386 if (dev->vblank[0].enabled)
387 psb_disable_pipestat(dev_priv, 0, PIPE_VBLANK_INTERRUPT_ENABLE);
388
389 if (dev->vblank[1].enabled)
390 psb_disable_pipestat(dev_priv, 1, PIPE_VBLANK_INTERRUPT_ENABLE);
391
392 if (dev->vblank[2].enabled)
393 psb_disable_pipestat(dev_priv, 2, PIPE_VBLANK_INTERRUPT_ENABLE);
394
395 dev_priv->vdc_irq_mask &= _PSB_IRQ_SGX_FLAG |
396 _PSB_IRQ_MSVDX_FLAG |
397 _LNC_IRQ_TOPAZ_FLAG;
398
399 /* These two registers are safe even if display island is off */
400 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
401 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
402
403 wmb();
404
405 /* This register is safe even if display island is off */
406 PSB_WVDC32(PSB_RVDC32(PSB_INT_IDENTITY_R), PSB_INT_IDENTITY_R);
407 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
408}
409
410void psb_irq_turn_on_dpst(struct drm_device *dev)
411{
412 struct drm_psb_private *dev_priv =
413 (struct drm_psb_private *) dev->dev_private;
414 u32 hist_reg;
415 u32 pwm_reg;
416
417 if (gma_power_begin(dev, false)) {
418 PSB_WVDC32(1 << 31, HISTOGRAM_LOGIC_CONTROL);
419 hist_reg = PSB_RVDC32(HISTOGRAM_LOGIC_CONTROL);
420 PSB_WVDC32(1 << 31, HISTOGRAM_INT_CONTROL);
421 hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
422
423 PSB_WVDC32(0x80010100, PWM_CONTROL_LOGIC);
424 pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
425 PSB_WVDC32(pwm_reg | PWM_PHASEIN_ENABLE
426 | PWM_PHASEIN_INT_ENABLE,
427 PWM_CONTROL_LOGIC);
428 pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
429
430 psb_enable_pipestat(dev_priv, 0, PIPE_DPST_EVENT_ENABLE);
431
432 hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
433 PSB_WVDC32(hist_reg | HISTOGRAM_INT_CTRL_CLEAR,
434 HISTOGRAM_INT_CONTROL);
435 pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
436 PSB_WVDC32(pwm_reg | 0x80010100 | PWM_PHASEIN_ENABLE,
437 PWM_CONTROL_LOGIC);
438
439 gma_power_end(dev);
440 }
441}
442
443int psb_irq_enable_dpst(struct drm_device *dev)
444{
445 struct drm_psb_private *dev_priv =
446 (struct drm_psb_private *) dev->dev_private;
447 unsigned long irqflags;
448
449 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
450
451 /* enable DPST */
452 mid_enable_pipe_event(dev_priv, 0);
453 psb_irq_turn_on_dpst(dev);
454
455 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
456 return 0;
457}
458
459void psb_irq_turn_off_dpst(struct drm_device *dev)
460{
461 struct drm_psb_private *dev_priv =
462 (struct drm_psb_private *) dev->dev_private;
463 u32 hist_reg;
464 u32 pwm_reg;
465
466 if (gma_power_begin(dev, false)) {
467 PSB_WVDC32(0x00000000, HISTOGRAM_INT_CONTROL);
468 hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
469
470 psb_disable_pipestat(dev_priv, 0, PIPE_DPST_EVENT_ENABLE);
471
472 pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
473 PSB_WVDC32(pwm_reg & ~PWM_PHASEIN_INT_ENABLE,
474 PWM_CONTROL_LOGIC);
475 pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
476
477 gma_power_end(dev);
478 }
479}
480
481int psb_irq_disable_dpst(struct drm_device *dev)
482{
483 struct drm_psb_private *dev_priv =
484 (struct drm_psb_private *) dev->dev_private;
485 unsigned long irqflags;
486
487 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
488
489 mid_disable_pipe_event(dev_priv, 0);
490 psb_irq_turn_off_dpst(dev);
491
492 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
493
494 return 0;
495}
496
497/*
498 * It is used to enable VBLANK interrupt
499 */
500int psb_enable_vblank(struct drm_device *dev, unsigned int pipe)
501{
502 struct drm_psb_private *dev_priv = dev->dev_private;
503 unsigned long irqflags;
504 uint32_t reg_val = 0;
505 uint32_t pipeconf_reg = mid_pipeconf(pipe);
506
507 /* Medfield is different - we should perhaps extract out vblank
508 and blacklight etc ops */
509 if (IS_MFLD(dev))
510 return mdfld_enable_te(dev, pipe);
511
512 if (gma_power_begin(dev, false)) {
513 reg_val = REG_READ(pipeconf_reg);
514 gma_power_end(dev);
515 }
516
517 if (!(reg_val & PIPEACONF_ENABLE))
518 return -EINVAL;
519
520 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
521
522 if (pipe == 0)
523 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEA_FLAG;
524 else if (pipe == 1)
525 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEB_FLAG;
526
527 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
528 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
529 psb_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
530
531 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
532
533 return 0;
534}
535
536/*
537 * It is used to disable VBLANK interrupt
538 */
539void psb_disable_vblank(struct drm_device *dev, unsigned int pipe)
540{
541 struct drm_psb_private *dev_priv = dev->dev_private;
542 unsigned long irqflags;
543
544 if (IS_MFLD(dev))
545 mdfld_disable_te(dev, pipe);
546 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
547
548 if (pipe == 0)
549 dev_priv->vdc_irq_mask &= ~_PSB_VSYNC_PIPEA_FLAG;
550 else if (pipe == 1)
551 dev_priv->vdc_irq_mask &= ~_PSB_VSYNC_PIPEB_FLAG;
552
553 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
554 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
555 psb_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
556
557 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
558}
559
560/*
561 * It is used to enable TE interrupt
562 */
563int mdfld_enable_te(struct drm_device *dev, int pipe)
564{
565 struct drm_psb_private *dev_priv =
566 (struct drm_psb_private *) dev->dev_private;
567 unsigned long irqflags;
568 uint32_t reg_val = 0;
569 uint32_t pipeconf_reg = mid_pipeconf(pipe);
570
571 if (gma_power_begin(dev, false)) {
572 reg_val = REG_READ(pipeconf_reg);
573 gma_power_end(dev);
574 }
575
576 if (!(reg_val & PIPEACONF_ENABLE))
577 return -EINVAL;
578
579 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
580
581 mid_enable_pipe_event(dev_priv, pipe);
582 psb_enable_pipestat(dev_priv, pipe, PIPE_TE_ENABLE);
583
584 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
585
586 return 0;
587}
588
589/*
590 * It is used to disable TE interrupt
591 */
592void mdfld_disable_te(struct drm_device *dev, int pipe)
593{
594 struct drm_psb_private *dev_priv =
595 (struct drm_psb_private *) dev->dev_private;
596 unsigned long irqflags;
597
598 if (!dev_priv->dsr_enable)
599 return;
600
601 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
602
603 mid_disable_pipe_event(dev_priv, pipe);
604 psb_disable_pipestat(dev_priv, pipe, PIPE_TE_ENABLE);
605
606 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
607}
608
609/* Called from drm generic code, passed a 'crtc', which
610 * we use as a pipe index
611 */
612u32 psb_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
613{
614 uint32_t high_frame = PIPEAFRAMEHIGH;
615 uint32_t low_frame = PIPEAFRAMEPIXEL;
616 uint32_t pipeconf_reg = PIPEACONF;
617 uint32_t reg_val = 0;
618 uint32_t high1 = 0, high2 = 0, low = 0, count = 0;
619
620 switch (pipe) {
621 case 0:
622 break;
623 case 1:
624 high_frame = PIPEBFRAMEHIGH;
625 low_frame = PIPEBFRAMEPIXEL;
626 pipeconf_reg = PIPEBCONF;
627 break;
628 case 2:
629 high_frame = PIPECFRAMEHIGH;
630 low_frame = PIPECFRAMEPIXEL;
631 pipeconf_reg = PIPECCONF;
632 break;
633 default:
634 dev_err(dev->dev, "%s, invalid pipe.\n", __func__);
635 return 0;
636 }
637
638 if (!gma_power_begin(dev, false))
639 return 0;
640
641 reg_val = REG_READ(pipeconf_reg);
642
643 if (!(reg_val & PIPEACONF_ENABLE)) {
644 dev_err(dev->dev, "trying to get vblank count for disabled pipe %u\n",
645 pipe);
646 goto psb_get_vblank_counter_exit;
647 }
648
649 /*
650 * High & low register fields aren't synchronized, so make sure
651 * we get a low value that's stable across two reads of the high
652 * register.
653 */
654 do {
655 high1 = ((REG_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
656 PIPE_FRAME_HIGH_SHIFT);
657 low = ((REG_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
658 PIPE_FRAME_LOW_SHIFT);
659 high2 = ((REG_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
660 PIPE_FRAME_HIGH_SHIFT);
661 } while (high1 != high2);
662
663 count = (high1 << 8) | low;
664
665psb_get_vblank_counter_exit:
666
667 gma_power_end(dev);
668
669 return count;
670}
671
1// SPDX-License-Identifier: GPL-2.0-only
2/**************************************************************************
3 * Copyright (c) 2007, Intel Corporation.
4 * All Rights Reserved.
5 *
6 * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
7 * develop this driver.
8 *
9 **************************************************************************/
10
11#include <drm/drm_drv.h>
12#include <drm/drm_vblank.h>
13
14#include "power.h"
15#include "psb_drv.h"
16#include "psb_intel_reg.h"
17#include "psb_irq.h"
18#include "psb_reg.h"
19
20/*
21 * inline functions
22 */
23
24static inline u32 gma_pipestat(int pipe)
25{
26 if (pipe == 0)
27 return PIPEASTAT;
28 if (pipe == 1)
29 return PIPEBSTAT;
30 if (pipe == 2)
31 return PIPECSTAT;
32 BUG();
33}
34
35static inline u32 gma_pipe_event(int pipe)
36{
37 if (pipe == 0)
38 return _PSB_PIPEA_EVENT_FLAG;
39 if (pipe == 1)
40 return _MDFLD_PIPEB_EVENT_FLAG;
41 if (pipe == 2)
42 return _MDFLD_PIPEC_EVENT_FLAG;
43 BUG();
44}
45
46static inline u32 gma_pipeconf(int pipe)
47{
48 if (pipe == 0)
49 return PIPEACONF;
50 if (pipe == 1)
51 return PIPEBCONF;
52 if (pipe == 2)
53 return PIPECCONF;
54 BUG();
55}
56
57void gma_enable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
58{
59 if ((dev_priv->pipestat[pipe] & mask) != mask) {
60 u32 reg = gma_pipestat(pipe);
61 dev_priv->pipestat[pipe] |= mask;
62 /* Enable the interrupt, clear any pending status */
63 if (gma_power_begin(&dev_priv->dev, false)) {
64 u32 writeVal = PSB_RVDC32(reg);
65 writeVal |= (mask | (mask >> 16));
66 PSB_WVDC32(writeVal, reg);
67 (void) PSB_RVDC32(reg);
68 gma_power_end(&dev_priv->dev);
69 }
70 }
71}
72
73void gma_disable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
74{
75 if ((dev_priv->pipestat[pipe] & mask) != 0) {
76 u32 reg = gma_pipestat(pipe);
77 dev_priv->pipestat[pipe] &= ~mask;
78 if (gma_power_begin(&dev_priv->dev, false)) {
79 u32 writeVal = PSB_RVDC32(reg);
80 writeVal &= ~mask;
81 PSB_WVDC32(writeVal, reg);
82 (void) PSB_RVDC32(reg);
83 gma_power_end(&dev_priv->dev);
84 }
85 }
86}
87
88/*
89 * Display controller interrupt handler for pipe event.
90 */
91static void gma_pipe_event_handler(struct drm_device *dev, int pipe)
92{
93 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
94
95 uint32_t pipe_stat_val = 0;
96 uint32_t pipe_stat_reg = gma_pipestat(pipe);
97 uint32_t pipe_enable = dev_priv->pipestat[pipe];
98 uint32_t pipe_status = dev_priv->pipestat[pipe] >> 16;
99 uint32_t pipe_clear;
100 uint32_t i = 0;
101
102 spin_lock(&dev_priv->irqmask_lock);
103
104 pipe_stat_val = PSB_RVDC32(pipe_stat_reg);
105 pipe_stat_val &= pipe_enable | pipe_status;
106 pipe_stat_val &= pipe_stat_val >> 16;
107
108 spin_unlock(&dev_priv->irqmask_lock);
109
110 /* Clear the 2nd level interrupt status bits
111 * Sometimes the bits are very sticky so we repeat until they unstick */
112 for (i = 0; i < 0xffff; i++) {
113 PSB_WVDC32(PSB_RVDC32(pipe_stat_reg), pipe_stat_reg);
114 pipe_clear = PSB_RVDC32(pipe_stat_reg) & pipe_status;
115
116 if (pipe_clear == 0)
117 break;
118 }
119
120 if (pipe_clear)
121 dev_err(dev->dev,
122 "%s, can't clear status bits for pipe %d, its value = 0x%x.\n",
123 __func__, pipe, PSB_RVDC32(pipe_stat_reg));
124
125 if (pipe_stat_val & PIPE_VBLANK_STATUS) {
126 struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
127 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
128 unsigned long flags;
129
130 drm_handle_vblank(dev, pipe);
131
132 spin_lock_irqsave(&dev->event_lock, flags);
133 if (gma_crtc->page_flip_event) {
134 drm_crtc_send_vblank_event(crtc,
135 gma_crtc->page_flip_event);
136 gma_crtc->page_flip_event = NULL;
137 drm_crtc_vblank_put(crtc);
138 }
139 spin_unlock_irqrestore(&dev->event_lock, flags);
140 }
141}
142
143/*
144 * Display controller interrupt handler.
145 */
146static void gma_vdc_interrupt(struct drm_device *dev, uint32_t vdc_stat)
147{
148 if (vdc_stat & _PSB_IRQ_ASLE)
149 psb_intel_opregion_asle_intr(dev);
150
151 if (vdc_stat & _PSB_VSYNC_PIPEA_FLAG)
152 gma_pipe_event_handler(dev, 0);
153
154 if (vdc_stat & _PSB_VSYNC_PIPEB_FLAG)
155 gma_pipe_event_handler(dev, 1);
156}
157
158/*
159 * SGX interrupt handler
160 */
161static void gma_sgx_interrupt(struct drm_device *dev, u32 stat_1, u32 stat_2)
162{
163 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
164 u32 val, addr;
165
166 if (stat_1 & _PSB_CE_TWOD_COMPLETE)
167 val = PSB_RSGX32(PSB_CR_2D_BLIT_STATUS);
168
169 if (stat_2 & _PSB_CE2_BIF_REQUESTER_FAULT) {
170 val = PSB_RSGX32(PSB_CR_BIF_INT_STAT);
171 addr = PSB_RSGX32(PSB_CR_BIF_FAULT);
172 if (val) {
173 if (val & _PSB_CBI_STAT_PF_N_RW)
174 DRM_ERROR("SGX MMU page fault:");
175 else
176 DRM_ERROR("SGX MMU read / write protection fault:");
177
178 if (val & _PSB_CBI_STAT_FAULT_CACHE)
179 DRM_ERROR("\tCache requestor");
180 if (val & _PSB_CBI_STAT_FAULT_TA)
181 DRM_ERROR("\tTA requestor");
182 if (val & _PSB_CBI_STAT_FAULT_VDM)
183 DRM_ERROR("\tVDM requestor");
184 if (val & _PSB_CBI_STAT_FAULT_2D)
185 DRM_ERROR("\t2D requestor");
186 if (val & _PSB_CBI_STAT_FAULT_PBE)
187 DRM_ERROR("\tPBE requestor");
188 if (val & _PSB_CBI_STAT_FAULT_TSP)
189 DRM_ERROR("\tTSP requestor");
190 if (val & _PSB_CBI_STAT_FAULT_ISP)
191 DRM_ERROR("\tISP requestor");
192 if (val & _PSB_CBI_STAT_FAULT_USSEPDS)
193 DRM_ERROR("\tUSSEPDS requestor");
194 if (val & _PSB_CBI_STAT_FAULT_HOST)
195 DRM_ERROR("\tHost requestor");
196
197 DRM_ERROR("\tMMU failing address is 0x%08x.\n",
198 (unsigned int)addr);
199 }
200 }
201
202 /* Clear bits */
203 PSB_WSGX32(stat_1, PSB_CR_EVENT_HOST_CLEAR);
204 PSB_WSGX32(stat_2, PSB_CR_EVENT_HOST_CLEAR2);
205 PSB_RSGX32(PSB_CR_EVENT_HOST_CLEAR2);
206}
207
208static irqreturn_t gma_irq_handler(int irq, void *arg)
209{
210 struct drm_device *dev = arg;
211 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
212 uint32_t vdc_stat, dsp_int = 0, sgx_int = 0, hotplug_int = 0;
213 u32 sgx_stat_1, sgx_stat_2;
214 int handled = 0;
215
216 spin_lock(&dev_priv->irqmask_lock);
217
218 vdc_stat = PSB_RVDC32(PSB_INT_IDENTITY_R);
219
220 if (vdc_stat & (_PSB_PIPE_EVENT_FLAG|_PSB_IRQ_ASLE))
221 dsp_int = 1;
222
223 if (vdc_stat & _PSB_IRQ_SGX_FLAG)
224 sgx_int = 1;
225 if (vdc_stat & _PSB_IRQ_DISP_HOTSYNC)
226 hotplug_int = 1;
227
228 vdc_stat &= dev_priv->vdc_irq_mask;
229 spin_unlock(&dev_priv->irqmask_lock);
230
231 if (dsp_int) {
232 gma_vdc_interrupt(dev, vdc_stat);
233 handled = 1;
234 }
235
236 if (sgx_int) {
237 sgx_stat_1 = PSB_RSGX32(PSB_CR_EVENT_STATUS);
238 sgx_stat_2 = PSB_RSGX32(PSB_CR_EVENT_STATUS2);
239 gma_sgx_interrupt(dev, sgx_stat_1, sgx_stat_2);
240 handled = 1;
241 }
242
243 /* Note: this bit has other meanings on some devices, so we will
244 need to address that later if it ever matters */
245 if (hotplug_int && dev_priv->ops->hotplug) {
246 handled = dev_priv->ops->hotplug(dev);
247 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
248 }
249
250 PSB_WVDC32(vdc_stat, PSB_INT_IDENTITY_R);
251 (void) PSB_RVDC32(PSB_INT_IDENTITY_R);
252 rmb();
253
254 if (!handled)
255 return IRQ_NONE;
256
257 return IRQ_HANDLED;
258}
259
260void gma_irq_preinstall(struct drm_device *dev)
261{
262 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
263 unsigned long irqflags;
264
265 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
266
267 PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
268 PSB_WVDC32(0x00000000, PSB_INT_MASK_R);
269 PSB_WVDC32(0x00000000, PSB_INT_ENABLE_R);
270 PSB_WSGX32(0x00000000, PSB_CR_EVENT_HOST_ENABLE);
271 PSB_RSGX32(PSB_CR_EVENT_HOST_ENABLE);
272
273 if (dev->vblank[0].enabled)
274 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEA_FLAG;
275 if (dev->vblank[1].enabled)
276 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEB_FLAG;
277
278 /* Revisit this area - want per device masks ? */
279 if (dev_priv->ops->hotplug)
280 dev_priv->vdc_irq_mask |= _PSB_IRQ_DISP_HOTSYNC;
281 dev_priv->vdc_irq_mask |= _PSB_IRQ_ASLE | _PSB_IRQ_SGX_FLAG;
282
283 /* This register is safe even if display island is off */
284 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
285 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
286}
287
288void gma_irq_postinstall(struct drm_device *dev)
289{
290 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
291 unsigned long irqflags;
292 unsigned int i;
293
294 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
295
296 /* Enable 2D and MMU fault interrupts */
297 PSB_WSGX32(_PSB_CE2_BIF_REQUESTER_FAULT, PSB_CR_EVENT_HOST_ENABLE2);
298 PSB_WSGX32(_PSB_CE_TWOD_COMPLETE, PSB_CR_EVENT_HOST_ENABLE);
299 PSB_RSGX32(PSB_CR_EVENT_HOST_ENABLE); /* Post */
300
301 /* This register is safe even if display island is off */
302 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
303 PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
304
305 for (i = 0; i < dev->num_crtcs; ++i) {
306 if (dev->vblank[i].enabled)
307 gma_enable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
308 else
309 gma_disable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
310 }
311
312 if (dev_priv->ops->hotplug_enable)
313 dev_priv->ops->hotplug_enable(dev, true);
314
315 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
316}
317
318int gma_irq_install(struct drm_device *dev)
319{
320 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
321 struct pci_dev *pdev = to_pci_dev(dev->dev);
322 int ret;
323
324 if (dev_priv->use_msi && pci_enable_msi(pdev)) {
325 dev_warn(dev->dev, "Enabling MSI failed!\n");
326 dev_priv->use_msi = false;
327 }
328
329 if (pdev->irq == IRQ_NOTCONNECTED)
330 return -ENOTCONN;
331
332 gma_irq_preinstall(dev);
333
334 /* PCI devices require shared interrupts. */
335 ret = request_irq(pdev->irq, gma_irq_handler, IRQF_SHARED, dev->driver->name, dev);
336 if (ret)
337 return ret;
338
339 gma_irq_postinstall(dev);
340
341 return 0;
342}
343
344void gma_irq_uninstall(struct drm_device *dev)
345{
346 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
347 struct pci_dev *pdev = to_pci_dev(dev->dev);
348 unsigned long irqflags;
349 unsigned int i;
350
351 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
352
353 if (dev_priv->ops->hotplug_enable)
354 dev_priv->ops->hotplug_enable(dev, false);
355
356 PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
357
358 for (i = 0; i < dev->num_crtcs; ++i) {
359 if (dev->vblank[i].enabled)
360 gma_disable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
361 }
362
363 dev_priv->vdc_irq_mask &= _PSB_IRQ_SGX_FLAG |
364 _PSB_IRQ_MSVDX_FLAG |
365 _LNC_IRQ_TOPAZ_FLAG;
366
367 /* These two registers are safe even if display island is off */
368 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
369 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
370
371 wmb();
372
373 /* This register is safe even if display island is off */
374 PSB_WVDC32(PSB_RVDC32(PSB_INT_IDENTITY_R), PSB_INT_IDENTITY_R);
375 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
376
377 free_irq(pdev->irq, dev);
378 if (dev_priv->use_msi)
379 pci_disable_msi(pdev);
380}
381
382int gma_crtc_enable_vblank(struct drm_crtc *crtc)
383{
384 struct drm_device *dev = crtc->dev;
385 unsigned int pipe = crtc->index;
386 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
387 unsigned long irqflags;
388 uint32_t reg_val = 0;
389 uint32_t pipeconf_reg = gma_pipeconf(pipe);
390
391 if (gma_power_begin(dev, false)) {
392 reg_val = REG_READ(pipeconf_reg);
393 gma_power_end(dev);
394 }
395
396 if (!(reg_val & PIPEACONF_ENABLE))
397 return -EINVAL;
398
399 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
400
401 if (pipe == 0)
402 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEA_FLAG;
403 else if (pipe == 1)
404 dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEB_FLAG;
405
406 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
407 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
408 gma_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
409
410 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
411
412 return 0;
413}
414
415void gma_crtc_disable_vblank(struct drm_crtc *crtc)
416{
417 struct drm_device *dev = crtc->dev;
418 unsigned int pipe = crtc->index;
419 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
420 unsigned long irqflags;
421
422 spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
423
424 if (pipe == 0)
425 dev_priv->vdc_irq_mask &= ~_PSB_VSYNC_PIPEA_FLAG;
426 else if (pipe == 1)
427 dev_priv->vdc_irq_mask &= ~_PSB_VSYNC_PIPEB_FLAG;
428
429 PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
430 PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
431 gma_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
432
433 spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
434}
435
436/* Called from drm generic code, passed a 'crtc', which
437 * we use as a pipe index
438 */
439u32 gma_crtc_get_vblank_counter(struct drm_crtc *crtc)
440{
441 struct drm_device *dev = crtc->dev;
442 unsigned int pipe = crtc->index;
443 uint32_t high_frame = PIPEAFRAMEHIGH;
444 uint32_t low_frame = PIPEAFRAMEPIXEL;
445 uint32_t pipeconf_reg = PIPEACONF;
446 uint32_t reg_val = 0;
447 uint32_t high1 = 0, high2 = 0, low = 0, count = 0;
448
449 switch (pipe) {
450 case 0:
451 break;
452 case 1:
453 high_frame = PIPEBFRAMEHIGH;
454 low_frame = PIPEBFRAMEPIXEL;
455 pipeconf_reg = PIPEBCONF;
456 break;
457 case 2:
458 high_frame = PIPECFRAMEHIGH;
459 low_frame = PIPECFRAMEPIXEL;
460 pipeconf_reg = PIPECCONF;
461 break;
462 default:
463 dev_err(dev->dev, "%s, invalid pipe.\n", __func__);
464 return 0;
465 }
466
467 if (!gma_power_begin(dev, false))
468 return 0;
469
470 reg_val = REG_READ(pipeconf_reg);
471
472 if (!(reg_val & PIPEACONF_ENABLE)) {
473 dev_err(dev->dev, "trying to get vblank count for disabled pipe %u\n",
474 pipe);
475 goto err_gma_power_end;
476 }
477
478 /*
479 * High & low register fields aren't synchronized, so make sure
480 * we get a low value that's stable across two reads of the high
481 * register.
482 */
483 do {
484 high1 = ((REG_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
485 PIPE_FRAME_HIGH_SHIFT);
486 low = ((REG_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
487 PIPE_FRAME_LOW_SHIFT);
488 high2 = ((REG_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
489 PIPE_FRAME_HIGH_SHIFT);
490 } while (high1 != high2);
491
492 count = (high1 << 8) | low;
493
494err_gma_power_end:
495 gma_power_end(dev);
496
497 return count;
498}
499