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1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/module.h>
7 #include <linux/slab.h>
8 #include <linux/uaccess.h>
9 #include <linux/debugfs.h>
10 #include <linux/component.h>
11 #include <linux/of_irq.h>
12 #include <linux/delay.h>
13
14 #include "msm_drv.h"
15 #include "msm_kms.h"
16 #include "dp_hpd.h"
17 #include "dp_parser.h"
18 #include "dp_power.h"
19 #include "dp_catalog.h"
20 #include "dp_aux.h"
21 #include "dp_reg.h"
22 #include "dp_link.h"
23 #include "dp_panel.h"
24 #include "dp_ctrl.h"
25 #include "dp_display.h"
26 #include "dp_drm.h"
27 #include "dp_audio.h"
28 #include "dp_debug.h"
29
30 static struct msm_dp *g_dp_display;
31 #define HPD_STRING_SIZE 30
32
33 enum {
34 ISR_DISCONNECTED,
35 ISR_CONNECT_PENDING,
36 ISR_CONNECTED,
37 ISR_HPD_REPLUG_COUNT,
38 ISR_IRQ_HPD_PULSE_COUNT,
39 ISR_HPD_LO_GLITH_COUNT,
40 };
41
42 /* event thread connection state */
43 enum {
44 ST_DISCONNECTED,
45 ST_CONNECT_PENDING,
46 ST_CONNECTED,
47 ST_DISCONNECT_PENDING,
48 ST_DISPLAY_OFF,
49 ST_SUSPENDED,
50 };
51
52 enum {
53 EV_NO_EVENT,
54 /* hpd events */
55 EV_HPD_INIT_SETUP,
56 EV_HPD_PLUG_INT,
57 EV_IRQ_HPD_INT,
58 EV_HPD_REPLUG_INT,
59 EV_HPD_UNPLUG_INT,
60 EV_USER_NOTIFICATION,
61 EV_CONNECT_PENDING_TIMEOUT,
62 EV_DISCONNECT_PENDING_TIMEOUT,
63 };
64
65 #define EVENT_TIMEOUT (HZ/10) /* 100ms */
66 #define DP_EVENT_Q_MAX 8
67
68 #define DP_TIMEOUT_5_SECOND (5000/EVENT_TIMEOUT)
69 #define DP_TIMEOUT_NONE 0
70
71 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
72
73 struct dp_event {
74 u32 event_id;
75 u32 data;
76 u32 delay;
77 };
78
79 struct dp_display_private {
80 char *name;
81 int irq;
82
83 /* state variables */
84 bool core_initialized;
85 bool hpd_irq_on;
86 bool audio_supported;
87
88 struct platform_device *pdev;
89 struct dentry *root;
90
91 struct dp_usbpd *usbpd;
92 struct dp_parser *parser;
93 struct dp_power *power;
94 struct dp_catalog *catalog;
95 struct drm_dp_aux *aux;
96 struct dp_link *link;
97 struct dp_panel *panel;
98 struct dp_ctrl *ctrl;
99 struct dp_debug *debug;
100
101 struct dp_usbpd_cb usbpd_cb;
102 struct dp_display_mode dp_mode;
103 struct msm_dp dp_display;
104
105 /* wait for audio signaling */
106 struct completion audio_comp;
107
108 /* event related only access by event thread */
109 struct mutex event_mutex;
110 wait_queue_head_t event_q;
111 u32 hpd_state;
112 u32 event_pndx;
113 u32 event_gndx;
114 struct dp_event event_list[DP_EVENT_Q_MAX];
115 spinlock_t event_lock;
116
117 struct dp_audio *audio;
118 };
119
120 static const struct of_device_id dp_dt_match[] = {
121 {.compatible = "qcom,sc7180-dp"},
122 {}
123 };
124
125 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
126 u32 data, u32 delay)
127 {
128 unsigned long flag;
129 struct dp_event *todo;
130 int pndx;
131
132 spin_lock_irqsave(&dp_priv->event_lock, flag);
133 pndx = dp_priv->event_pndx + 1;
134 pndx %= DP_EVENT_Q_MAX;
135 if (pndx == dp_priv->event_gndx) {
136 pr_err("event_q is full: pndx=%d gndx=%d\n",
137 dp_priv->event_pndx, dp_priv->event_gndx);
138 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
139 return -EPERM;
140 }
141 todo = &dp_priv->event_list[dp_priv->event_pndx++];
142 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
143 todo->event_id = event;
144 todo->data = data;
145 todo->delay = delay;
146 wake_up(&dp_priv->event_q);
147 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
148
149 return 0;
150 }
151
152 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
153 {
154 unsigned long flag;
155 struct dp_event *todo;
156 u32 gndx;
157
158 spin_lock_irqsave(&dp_priv->event_lock, flag);
159 if (dp_priv->event_pndx == dp_priv->event_gndx) {
160 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
161 return -ENOENT;
162 }
163
164 gndx = dp_priv->event_gndx;
165 while (dp_priv->event_pndx != gndx) {
166 todo = &dp_priv->event_list[gndx];
167 if (todo->event_id == event) {
168 todo->event_id = EV_NO_EVENT; /* deleted */
169 todo->delay = 0;
170 }
171 gndx++;
172 gndx %= DP_EVENT_Q_MAX;
173 }
174 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
175
176 return 0;
177 }
178
179 void dp_display_signal_audio_start(struct msm_dp *dp_display)
180 {
181 struct dp_display_private *dp;
182
183 dp = container_of(dp_display, struct dp_display_private, dp_display);
184
185 reinit_completion(&dp->audio_comp);
186 }
187
188 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
189 {
190 struct dp_display_private *dp;
191
192 dp = container_of(dp_display, struct dp_display_private, dp_display);
193
194 complete_all(&dp->audio_comp);
195 }
196
197 static int dp_display_bind(struct device *dev, struct device *master,
198 void *data)
199 {
200 int rc = 0;
201 struct dp_display_private *dp;
202 struct drm_device *drm;
203 struct msm_drm_private *priv;
204
205 drm = dev_get_drvdata(master);
206
207 dp = container_of(g_dp_display,
208 struct dp_display_private, dp_display);
209
210 dp->dp_display.drm_dev = drm;
211 priv = drm->dev_private;
212 priv->dp = &(dp->dp_display);
213
214 rc = dp->parser->parse(dp->parser);
215 if (rc) {
216 DRM_ERROR("device tree parsing failed\n");
217 goto end;
218 }
219
220 rc = dp_aux_register(dp->aux);
221 if (rc) {
222 DRM_ERROR("DRM DP AUX register failed\n");
223 goto end;
224 }
225
226 rc = dp_power_client_init(dp->power);
227 if (rc) {
228 DRM_ERROR("Power client create failed\n");
229 goto end;
230 }
231
232 rc = dp_register_audio_driver(dev, dp->audio);
233 if (rc)
234 DRM_ERROR("Audio registration Dp failed\n");
235
236 end:
237 return rc;
238 }
239
240 static void dp_display_unbind(struct device *dev, struct device *master,
241 void *data)
242 {
243 struct dp_display_private *dp;
244 struct drm_device *drm = dev_get_drvdata(master);
245 struct msm_drm_private *priv = drm->dev_private;
246
247 dp = container_of(g_dp_display,
248 struct dp_display_private, dp_display);
249
250 dp_power_client_deinit(dp->power);
251 dp_aux_unregister(dp->aux);
252 priv->dp = NULL;
253 }
254
255 static const struct component_ops dp_display_comp_ops = {
256 .bind = dp_display_bind,
257 .unbind = dp_display_unbind,
258 };
259
260 static bool dp_display_is_ds_bridge(struct dp_panel *panel)
261 {
262 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
263 DP_DWN_STRM_PORT_PRESENT);
264 }
265
266 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
267 {
268 return dp_display_is_ds_bridge(dp->panel) &&
269 (dp->link->sink_count == 0);
270 }
271
272 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
273 {
274 struct dp_display_private *dp;
275 struct drm_connector *connector;
276
277 dp = container_of(dp_display, struct dp_display_private, dp_display);
278
279 connector = dp->dp_display.connector;
280 drm_helper_hpd_irq_event(connector->dev);
281 }
282
283
284 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
285 bool hpd)
286 {
287 if ((hpd && dp->dp_display.is_connected) ||
288 (!hpd && !dp->dp_display.is_connected)) {
289 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
290 return 0;
291 }
292
293 /* reset video pattern flag on disconnect */
294 if (!hpd)
295 dp->panel->video_test = false;
296
297 dp->dp_display.is_connected = hpd;
298
299 dp_display_send_hpd_event(&dp->dp_display);
300
301 return 0;
302 }
303
304 static int dp_display_process_hpd_high(struct dp_display_private *dp)
305 {
306 int rc = 0;
307 struct edid *edid;
308
309 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
310
311 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
312 if (rc)
313 goto end;
314
315 dp_link_process_request(dp->link);
316
317 edid = dp->panel->edid;
318
319 dp->audio_supported = drm_detect_monitor_audio(edid);
320 dp_panel_handle_sink_request(dp->panel);
321
322 dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
323 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
324
325 /*
326 * set sink to normal operation mode -- D0
327 * before dpcd read
328 */
329 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
330
331 dp_link_reset_phy_params_vx_px(dp->link);
332 rc = dp_ctrl_on_link(dp->ctrl);
333 if (rc) {
334 DRM_ERROR("failed to complete DP link training\n");
335 goto end;
336 }
337
338 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
339
340 end:
341 return rc;
342 }
343
344 static void dp_display_host_init(struct dp_display_private *dp, int reset)
345 {
346 bool flip = false;
347
348 if (dp->core_initialized) {
349 DRM_DEBUG_DP("DP core already initialized\n");
350 return;
351 }
352
353 if (dp->usbpd->orientation == ORIENTATION_CC2)
354 flip = true;
355
356 dp_power_init(dp->power, flip);
357 dp_ctrl_host_init(dp->ctrl, flip, reset);
358 dp_aux_init(dp->aux);
359 dp->core_initialized = true;
360 }
361
362 static void dp_display_host_deinit(struct dp_display_private *dp)
363 {
364 if (!dp->core_initialized) {
365 DRM_DEBUG_DP("DP core not initialized\n");
366 return;
367 }
368
369 dp_ctrl_host_deinit(dp->ctrl);
370 dp_aux_deinit(dp->aux);
371 dp_power_deinit(dp->power);
372
373 dp->core_initialized = false;
374 }
375
376 static int dp_display_usbpd_configure_cb(struct device *dev)
377 {
378 int rc = 0;
379 struct dp_display_private *dp;
380
381 if (!dev) {
382 DRM_ERROR("invalid dev\n");
383 rc = -EINVAL;
384 goto end;
385 }
386
387 dp = container_of(g_dp_display,
388 struct dp_display_private, dp_display);
389
390 dp_display_host_init(dp, false);
391
392 rc = dp_display_process_hpd_high(dp);
393 end:
394 return rc;
395 }
396
397 static int dp_display_usbpd_disconnect_cb(struct device *dev)
398 {
399 int rc = 0;
400 struct dp_display_private *dp;
401
402 if (!dev) {
403 DRM_ERROR("invalid dev\n");
404 rc = -EINVAL;
405 return rc;
406 }
407
408 dp = container_of(g_dp_display,
409 struct dp_display_private, dp_display);
410
411 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
412
413 return rc;
414 }
415
416 static void dp_display_handle_video_request(struct dp_display_private *dp)
417 {
418 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
419 dp->panel->video_test = true;
420 dp_link_send_test_response(dp->link);
421 }
422 }
423
424 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
425 {
426 int rc = 0;
427
428 if (dp_display_is_sink_count_zero(dp)) {
429 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
430 if (dp->hpd_state != ST_DISCONNECTED) {
431 dp->hpd_state = ST_DISCONNECT_PENDING;
432 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
433 }
434 } else {
435 if (dp->hpd_state == ST_DISCONNECTED) {
436 dp->hpd_state = ST_CONNECT_PENDING;
437 rc = dp_display_process_hpd_high(dp);
438 if (rc)
439 dp->hpd_state = ST_DISCONNECTED;
440 }
441 }
442
443 return rc;
444 }
445
446 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
447 {
448 u32 sink_request = dp->link->sink_request;
449
450 if (dp->hpd_state == ST_DISCONNECTED) {
451 if (sink_request & DP_LINK_STATUS_UPDATED) {
452 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
453 return -EINVAL;
454 }
455 }
456
457 dp_ctrl_handle_sink_request(dp->ctrl);
458
459 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
460 dp_display_handle_video_request(dp);
461
462 return 0;
463 }
464
465 static int dp_display_usbpd_attention_cb(struct device *dev)
466 {
467 int rc = 0;
468 u32 sink_request;
469 struct dp_display_private *dp;
470
471 if (!dev) {
472 DRM_ERROR("invalid dev\n");
473 return -EINVAL;
474 }
475
476 dp = container_of(g_dp_display,
477 struct dp_display_private, dp_display);
478
479 /* check for any test request issued by sink */
480 rc = dp_link_process_request(dp->link);
481 if (!rc) {
482 sink_request = dp->link->sink_request;
483 if (sink_request & DS_PORT_STATUS_CHANGED)
484 rc = dp_display_handle_port_ststus_changed(dp);
485 else
486 rc = dp_display_handle_irq_hpd(dp);
487 }
488
489 return rc;
490 }
491
492 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
493 {
494 struct dp_usbpd *hpd = dp->usbpd;
495 u32 state;
496 u32 tout = DP_TIMEOUT_5_SECOND;
497 int ret;
498
499 if (!hpd)
500 return 0;
501
502 mutex_lock(&dp->event_mutex);
503
504 state = dp->hpd_state;
505 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
506 mutex_unlock(&dp->event_mutex);
507 return 0;
508 }
509
510 if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
511 mutex_unlock(&dp->event_mutex);
512 return 0;
513 }
514
515 if (state == ST_DISCONNECT_PENDING) {
516 /* wait until ST_DISCONNECTED */
517 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
518 mutex_unlock(&dp->event_mutex);
519 return 0;
520 }
521
522 dp->hpd_state = ST_CONNECT_PENDING;
523
524 hpd->hpd_high = 1;
525
526 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
527 if (ret) { /* link train failed */
528 hpd->hpd_high = 0;
529 dp->hpd_state = ST_DISCONNECTED;
530
531 if (ret == -ECONNRESET) { /* cable unplugged */
532 dp->core_initialized = false;
533 }
534
535 } else {
536 /* start sentinel checking in case of missing uevent */
537 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
538 }
539
540 /* enable HDP irq_hpd/replug interrupt */
541 dp_catalog_hpd_config_intr(dp->catalog,
542 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);
543
544 mutex_unlock(&dp->event_mutex);
545
546 /* uevent will complete connection part */
547 return 0;
548 };
549
550 static int dp_display_enable(struct dp_display_private *dp, u32 data);
551 static int dp_display_disable(struct dp_display_private *dp, u32 data);
552
553 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
554 {
555 u32 state;
556
557 mutex_lock(&dp->event_mutex);
558
559 state = dp->hpd_state;
560 if (state == ST_CONNECT_PENDING)
561 dp->hpd_state = ST_CONNECTED;
562
563 mutex_unlock(&dp->event_mutex);
564
565 return 0;
566 }
567
568 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
569 bool plugged)
570 {
571 struct dp_display_private *dp;
572
573 dp = container_of(dp_display,
574 struct dp_display_private, dp_display);
575
576 /* notify audio subsystem only if sink supports audio */
577 if (dp_display->plugged_cb && dp_display->codec_dev &&
578 dp->audio_supported)
579 dp_display->plugged_cb(dp_display->codec_dev, plugged);
580 }
581
582 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
583 {
584 struct dp_usbpd *hpd = dp->usbpd;
585 u32 state;
586
587 if (!hpd)
588 return 0;
589
590 mutex_lock(&dp->event_mutex);
591
592 state = dp->hpd_state;
593
594 /* disable irq_hpd/replug interrupts */
595 dp_catalog_hpd_config_intr(dp->catalog,
596 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);
597
598 /* unplugged, no more irq_hpd handle */
599 dp_del_event(dp, EV_IRQ_HPD_INT);
600
601 if (state == ST_DISCONNECTED) {
602 /* triggered by irq_hdp with sink_count = 0 */
603 if (dp->link->sink_count == 0) {
604 dp_ctrl_off_phy(dp->ctrl);
605 hpd->hpd_high = 0;
606 dp->core_initialized = false;
607 }
608 mutex_unlock(&dp->event_mutex);
609 return 0;
610 }
611
612 if (state == ST_DISCONNECT_PENDING) {
613 mutex_unlock(&dp->event_mutex);
614 return 0;
615 }
616
617 if (state == ST_CONNECT_PENDING) {
618 /* wait until CONNECTED */
619 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
620 mutex_unlock(&dp->event_mutex);
621 return 0;
622 }
623
624 dp->hpd_state = ST_DISCONNECT_PENDING;
625
626 /* disable HPD plug interrupts */
627 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
628
629 hpd->hpd_high = 0;
630
631 /*
632 * We don't need separate work for disconnect as
633 * connect/attention interrupts are disabled
634 */
635 dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
636
637 /* start sentinel checking in case of missing uevent */
638 dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
639
640 /* signal the disconnect event early to ensure proper teardown */
641 dp_display_handle_plugged_change(g_dp_display, false);
642
643 /* enable HDP plug interrupt to prepare for next plugin */
644 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
645
646 /* uevent will complete disconnection part */
647 mutex_unlock(&dp->event_mutex);
648 return 0;
649 }
650
651 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
652 {
653 u32 state;
654
655 mutex_lock(&dp->event_mutex);
656
657 state = dp->hpd_state;
658 if (state == ST_DISCONNECT_PENDING)
659 dp->hpd_state = ST_DISCONNECTED;
660
661 mutex_unlock(&dp->event_mutex);
662
663 return 0;
664 }
665
666 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
667 {
668 u32 state;
669 int ret;
670
671 mutex_lock(&dp->event_mutex);
672
673 /* irq_hpd can happen at either connected or disconnected state */
674 state = dp->hpd_state;
675 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
676 mutex_unlock(&dp->event_mutex);
677 return 0;
678 }
679
680 if (state == ST_CONNECT_PENDING) {
681 /* wait until ST_CONNECTED */
682 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
683 mutex_unlock(&dp->event_mutex);
684 return 0;
685 }
686
687 if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
688 /* wait until ST_CONNECTED */
689 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
690 mutex_unlock(&dp->event_mutex);
691 return 0;
692 }
693
694 ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
695 if (ret == -ECONNRESET) { /* cable unplugged */
696 dp->core_initialized = false;
697 }
698
699 mutex_unlock(&dp->event_mutex);
700
701 return 0;
702 }
703
704 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
705 {
706 dp_debug_put(dp->debug);
707 dp_panel_put(dp->panel);
708 dp_aux_put(dp->aux);
709 dp_audio_put(dp->audio);
710 }
711
712 static int dp_init_sub_modules(struct dp_display_private *dp)
713 {
714 int rc = 0;
715 struct device *dev = &dp->pdev->dev;
716 struct dp_usbpd_cb *cb = &dp->usbpd_cb;
717 struct dp_panel_in panel_in = {
718 .dev = dev,
719 };
720
721 /* Callback APIs used for cable status change event */
722 cb->configure = dp_display_usbpd_configure_cb;
723 cb->disconnect = dp_display_usbpd_disconnect_cb;
724 cb->attention = dp_display_usbpd_attention_cb;
725
726 dp->usbpd = dp_hpd_get(dev, cb);
727 if (IS_ERR(dp->usbpd)) {
728 rc = PTR_ERR(dp->usbpd);
729 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
730 dp->usbpd = NULL;
731 goto error;
732 }
733
734 dp->parser = dp_parser_get(dp->pdev);
735 if (IS_ERR(dp->parser)) {
736 rc = PTR_ERR(dp->parser);
737 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
738 dp->parser = NULL;
739 goto error;
740 }
741
742 dp->catalog = dp_catalog_get(dev, &dp->parser->io);
743 if (IS_ERR(dp->catalog)) {
744 rc = PTR_ERR(dp->catalog);
745 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
746 dp->catalog = NULL;
747 goto error;
748 }
749
750 dp->power = dp_power_get(dev, dp->parser);
751 if (IS_ERR(dp->power)) {
752 rc = PTR_ERR(dp->power);
753 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
754 dp->power = NULL;
755 goto error;
756 }
757
758 dp->aux = dp_aux_get(dev, dp->catalog);
759 if (IS_ERR(dp->aux)) {
760 rc = PTR_ERR(dp->aux);
761 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
762 dp->aux = NULL;
763 goto error;
764 }
765
766 dp->link = dp_link_get(dev, dp->aux);
767 if (IS_ERR(dp->link)) {
768 rc = PTR_ERR(dp->link);
769 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
770 dp->link = NULL;
771 goto error_link;
772 }
773
774 panel_in.aux = dp->aux;
775 panel_in.catalog = dp->catalog;
776 panel_in.link = dp->link;
777
778 dp->panel = dp_panel_get(&panel_in);
779 if (IS_ERR(dp->panel)) {
780 rc = PTR_ERR(dp->panel);
781 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
782 dp->panel = NULL;
783 goto error_link;
784 }
785
786 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
787 dp->power, dp->catalog, dp->parser);
788 if (IS_ERR(dp->ctrl)) {
789 rc = PTR_ERR(dp->ctrl);
790 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
791 dp->ctrl = NULL;
792 goto error_ctrl;
793 }
794
795 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
796 if (IS_ERR(dp->audio)) {
797 rc = PTR_ERR(dp->audio);
798 pr_err("failed to initialize audio, rc = %d\n", rc);
799 dp->audio = NULL;
800 goto error_ctrl;
801 }
802
803 return rc;
804
805 error_ctrl:
806 dp_panel_put(dp->panel);
807 error_link:
808 dp_aux_put(dp->aux);
809 error:
810 return rc;
811 }
812
813 static int dp_display_set_mode(struct msm_dp *dp_display,
814 struct dp_display_mode *mode)
815 {
816 struct dp_display_private *dp;
817
818 dp = container_of(dp_display, struct dp_display_private, dp_display);
819
820 dp->panel->dp_mode.drm_mode = mode->drm_mode;
821 dp->panel->dp_mode.bpp = mode->bpp;
822 dp->panel->dp_mode.capabilities = mode->capabilities;
823 dp_panel_init_panel_info(dp->panel);
824 return 0;
825 }
826
827 static int dp_display_prepare(struct msm_dp *dp)
828 {
829 return 0;
830 }
831
832 static int dp_display_enable(struct dp_display_private *dp, u32 data)
833 {
834 int rc = 0;
835 struct msm_dp *dp_display;
836
837 dp_display = g_dp_display;
838
839 if (dp_display->power_on) {
840 DRM_DEBUG_DP("Link already setup, return\n");
841 return 0;
842 }
843
844 rc = dp_ctrl_on_stream(dp->ctrl);
845 if (!rc)
846 dp_display->power_on = true;
847
848 return rc;
849 }
850
851 static int dp_display_post_enable(struct msm_dp *dp_display)
852 {
853 struct dp_display_private *dp;
854 u32 rate;
855
856 dp = container_of(dp_display, struct dp_display_private, dp_display);
857
858 rate = dp->link->link_params.rate;
859
860 if (dp->audio_supported) {
861 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
862 dp->audio->lane_count = dp->link->link_params.num_lanes;
863 }
864
865 /* signal the connect event late to synchronize video and display */
866 dp_display_handle_plugged_change(dp_display, true);
867 return 0;
868 }
869
870 static int dp_display_disable(struct dp_display_private *dp, u32 data)
871 {
872 struct msm_dp *dp_display;
873
874 dp_display = g_dp_display;
875
876 if (!dp_display->power_on)
877 return 0;
878
879 /* wait only if audio was enabled */
880 if (dp_display->audio_enabled) {
881 /* signal the disconnect event */
882 dp_display_handle_plugged_change(dp_display, false);
883 if (!wait_for_completion_timeout(&dp->audio_comp,
884 HZ * 5))
885 DRM_ERROR("audio comp timeout\n");
886 }
887
888 dp_display->audio_enabled = false;
889
890 /* triggered by irq_hpd with sink_count = 0 */
891 if (dp->link->sink_count == 0) {
892 dp_ctrl_off_link_stream(dp->ctrl);
893 } else {
894 dp_ctrl_off(dp->ctrl);
895 dp->core_initialized = false;
896 }
897
898 dp_display->power_on = false;
899
900 return 0;
901 }
902
903 static int dp_display_unprepare(struct msm_dp *dp)
904 {
905 return 0;
906 }
907
908 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
909 hdmi_codec_plugged_cb fn, struct device *codec_dev)
910 {
911 bool plugged;
912
913 dp_display->plugged_cb = fn;
914 dp_display->codec_dev = codec_dev;
915 plugged = dp_display->is_connected;
916 dp_display_handle_plugged_change(dp_display, plugged);
917
918 return 0;
919 }
920
921 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
922 {
923 const u32 num_components = 3, default_bpp = 24;
924 struct dp_display_private *dp_display;
925 struct dp_link_info *link_info;
926 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
927
928 if (!dp || !mode_pclk_khz || !dp->connector) {
929 DRM_ERROR("invalid params\n");
930 return -EINVAL;
931 }
932
933 dp_display = container_of(dp, struct dp_display_private, dp_display);
934 link_info = &dp_display->panel->link_info;
935
936 mode_bpp = dp->connector->display_info.bpc * num_components;
937 if (!mode_bpp)
938 mode_bpp = default_bpp;
939
940 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
941 mode_bpp, mode_pclk_khz);
942
943 mode_rate_khz = mode_pclk_khz * mode_bpp;
944 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
945
946 if (mode_rate_khz > supported_rate_khz)
947 return MODE_BAD;
948
949 return MODE_OK;
950 }
951
952 int dp_display_get_modes(struct msm_dp *dp,
953 struct dp_display_mode *dp_mode)
954 {
955 struct dp_display_private *dp_display;
956 int ret = 0;
957
958 if (!dp) {
959 DRM_ERROR("invalid params\n");
960 return 0;
961 }
962
963 dp_display = container_of(dp, struct dp_display_private, dp_display);
964
965 ret = dp_panel_get_modes(dp_display->panel,
966 dp->connector, dp_mode);
967 if (dp_mode->drm_mode.clock)
968 dp->max_pclk_khz = dp_mode->drm_mode.clock;
969 return ret;
970 }
971
972 bool dp_display_check_video_test(struct msm_dp *dp)
973 {
974 struct dp_display_private *dp_display;
975
976 dp_display = container_of(dp, struct dp_display_private, dp_display);
977
978 return dp_display->panel->video_test;
979 }
980
981 int dp_display_get_test_bpp(struct msm_dp *dp)
982 {
983 struct dp_display_private *dp_display;
984
985 if (!dp) {
986 DRM_ERROR("invalid params\n");
987 return 0;
988 }
989
990 dp_display = container_of(dp, struct dp_display_private, dp_display);
991
992 return dp_link_bit_depth_to_bpp(
993 dp_display->link->test_video.test_bit_depth);
994 }
995
996 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
997 {
998 struct dp_display_private *dp_display;
999 struct drm_device *drm;
1000
1001 dp_display = container_of(dp, struct dp_display_private, dp_display);
1002 drm = dp->drm_dev;
1003
1004 /*
1005 * if we are reading registers we need the link clocks to be on
1006 * however till DP cable is connected this will not happen as we
1007 * do not know the resolution to power up with. Hence check the
1008 * power_on status before dumping DP registers to avoid crash due
1009 * to unclocked access
1010 */
1011 mutex_lock(&dp_display->event_mutex);
1012
1013 if (!dp->power_on) {
1014 mutex_unlock(&dp_display->event_mutex);
1015 return;
1016 }
1017
1018 dp_catalog_snapshot(dp_display->catalog, disp_state);
1019
1020 mutex_unlock(&dp_display->event_mutex);
1021 }
1022
1023 static void dp_display_config_hpd(struct dp_display_private *dp)
1024 {
1025
1026 dp_display_host_init(dp, true);
1027 dp_catalog_ctrl_hpd_config(dp->catalog);
1028
1029 /* Enable interrupt first time
1030 * we are leaving dp clocks on during disconnect
1031 * and never disable interrupt
1032 */
1033 enable_irq(dp->irq);
1034 }
1035
1036 static int hpd_event_thread(void *data)
1037 {
1038 struct dp_display_private *dp_priv;
1039 unsigned long flag;
1040 struct dp_event *todo;
1041 int timeout_mode = 0;
1042
1043 dp_priv = (struct dp_display_private *)data;
1044
1045 while (1) {
1046 if (timeout_mode) {
1047 wait_event_timeout(dp_priv->event_q,
1048 (dp_priv->event_pndx == dp_priv->event_gndx),
1049 EVENT_TIMEOUT);
1050 } else {
1051 wait_event_interruptible(dp_priv->event_q,
1052 (dp_priv->event_pndx != dp_priv->event_gndx));
1053 }
1054 spin_lock_irqsave(&dp_priv->event_lock, flag);
1055 todo = &dp_priv->event_list[dp_priv->event_gndx];
1056 if (todo->delay) {
1057 struct dp_event *todo_next;
1058
1059 dp_priv->event_gndx++;
1060 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1061
1062 /* re enter delay event into q */
1063 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1064 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1065 todo_next->event_id = todo->event_id;
1066 todo_next->data = todo->data;
1067 todo_next->delay = todo->delay - 1;
1068
1069 /* clean up older event */
1070 todo->event_id = EV_NO_EVENT;
1071 todo->delay = 0;
1072
1073 /* switch to timeout mode */
1074 timeout_mode = 1;
1075 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1076 continue;
1077 }
1078
1079 /* timeout with no events in q */
1080 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1081 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1082 continue;
1083 }
1084
1085 dp_priv->event_gndx++;
1086 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1087 timeout_mode = 0;
1088 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1089
1090 switch (todo->event_id) {
1091 case EV_HPD_INIT_SETUP:
1092 dp_display_config_hpd(dp_priv);
1093 break;
1094 case EV_HPD_PLUG_INT:
1095 dp_hpd_plug_handle(dp_priv, todo->data);
1096 break;
1097 case EV_HPD_UNPLUG_INT:
1098 dp_hpd_unplug_handle(dp_priv, todo->data);
1099 break;
1100 case EV_IRQ_HPD_INT:
1101 dp_irq_hpd_handle(dp_priv, todo->data);
1102 break;
1103 case EV_HPD_REPLUG_INT:
1104 /* do nothing */
1105 break;
1106 case EV_USER_NOTIFICATION:
1107 dp_display_send_hpd_notification(dp_priv,
1108 todo->data);
1109 break;
1110 case EV_CONNECT_PENDING_TIMEOUT:
1111 dp_connect_pending_timeout(dp_priv,
1112 todo->data);
1113 break;
1114 case EV_DISCONNECT_PENDING_TIMEOUT:
1115 dp_disconnect_pending_timeout(dp_priv,
1116 todo->data);
1117 break;
1118 default:
1119 break;
1120 }
1121 }
1122
1123 return 0;
1124 }
1125
1126 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1127 {
1128 init_waitqueue_head(&dp_priv->event_q);
1129 spin_lock_init(&dp_priv->event_lock);
1130
1131 kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1132 }
1133
1134 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1135 {
1136 struct dp_display_private *dp = dev_id;
1137 irqreturn_t ret = IRQ_HANDLED;
1138 u32 hpd_isr_status;
1139
1140 if (!dp) {
1141 DRM_ERROR("invalid data\n");
1142 return IRQ_NONE;
1143 }
1144
1145 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1146
1147 if (hpd_isr_status & 0x0F) {
1148 /* hpd related interrupts */
1149 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1150 hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1151 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1152 }
1153
1154 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1155 /* stop sentinel connect pending checking */
1156 dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1157 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1158 }
1159
1160 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1161 dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1162
1163 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1164 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1165 }
1166
1167 /* DP controller isr */
1168 dp_ctrl_isr(dp->ctrl);
1169
1170 /* DP aux isr */
1171 dp_aux_isr(dp->aux);
1172
1173 return ret;
1174 }
1175
1176 int dp_display_request_irq(struct msm_dp *dp_display)
1177 {
1178 int rc = 0;
1179 struct dp_display_private *dp;
1180
1181 if (!dp_display) {
1182 DRM_ERROR("invalid input\n");
1183 return -EINVAL;
1184 }
1185
1186 dp = container_of(dp_display, struct dp_display_private, dp_display);
1187
1188 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1189 if (dp->irq < 0) {
1190 rc = dp->irq;
1191 DRM_ERROR("failed to get irq: %d\n", rc);
1192 return rc;
1193 }
1194
1195 rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1196 dp_display_irq_handler,
1197 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1198 if (rc < 0) {
1199 DRM_ERROR("failed to request IRQ%u: %d\n",
1200 dp->irq, rc);
1201 return rc;
1202 }
1203 disable_irq(dp->irq);
1204
1205 return 0;
1206 }
1207
1208 static int dp_display_probe(struct platform_device *pdev)
1209 {
1210 int rc = 0;
1211 struct dp_display_private *dp;
1212
1213 if (!pdev || !pdev->dev.of_node) {
1214 DRM_ERROR("pdev not found\n");
1215 return -ENODEV;
1216 }
1217
1218 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1219 if (!dp)
1220 return -ENOMEM;
1221
1222 dp->pdev = pdev;
1223 dp->name = "drm_dp";
1224
1225 rc = dp_init_sub_modules(dp);
1226 if (rc) {
1227 DRM_ERROR("init sub module failed\n");
1228 return -EPROBE_DEFER;
1229 }
1230
1231 mutex_init(&dp->event_mutex);
1232 g_dp_display = &dp->dp_display;
1233
1234 /* Store DP audio handle inside DP display */
1235 g_dp_display->dp_audio = dp->audio;
1236
1237 init_completion(&dp->audio_comp);
1238
1239 platform_set_drvdata(pdev, g_dp_display);
1240
1241 rc = component_add(&pdev->dev, &dp_display_comp_ops);
1242 if (rc) {
1243 DRM_ERROR("component add failed, rc=%d\n", rc);
1244 dp_display_deinit_sub_modules(dp);
1245 }
1246
1247 return rc;
1248 }
1249
1250 static int dp_display_remove(struct platform_device *pdev)
1251 {
1252 struct dp_display_private *dp;
1253
1254 dp = container_of(g_dp_display,
1255 struct dp_display_private, dp_display);
1256
1257 dp_display_deinit_sub_modules(dp);
1258
1259 component_del(&pdev->dev, &dp_display_comp_ops);
1260 platform_set_drvdata(pdev, NULL);
1261
1262 return 0;
1263 }
1264
1265 static int dp_pm_resume(struct device *dev)
1266 {
1267 struct platform_device *pdev = to_platform_device(dev);
1268 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1269 struct dp_display_private *dp;
1270 u32 status;
1271
1272 dp = container_of(dp_display, struct dp_display_private, dp_display);
1273
1274 mutex_lock(&dp->event_mutex);
1275
1276 /* start from disconnected state */
1277 dp->hpd_state = ST_DISCONNECTED;
1278
1279 /* turn on dp ctrl/phy */
1280 dp_display_host_init(dp, true);
1281
1282 dp_catalog_ctrl_hpd_config(dp->catalog);
1283
1284 status = dp_catalog_link_is_connected(dp->catalog);
1285
1286 /*
1287 * can not declared display is connected unless
1288 * HDMI cable is plugged in and sink_count of
1289 * dongle become 1
1290 */
1291 if (status && dp->link->sink_count)
1292 dp->dp_display.is_connected = true;
1293 else
1294 dp->dp_display.is_connected = false;
1295
1296 mutex_unlock(&dp->event_mutex);
1297
1298 return 0;
1299 }
1300
1301 static int dp_pm_suspend(struct device *dev)
1302 {
1303 struct platform_device *pdev = to_platform_device(dev);
1304 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1305 struct dp_display_private *dp;
1306
1307 dp = container_of(dp_display, struct dp_display_private, dp_display);
1308
1309 mutex_lock(&dp->event_mutex);
1310
1311 if (dp->core_initialized == true) {
1312 /* mainlink enabled */
1313 if (dp_power_clk_status(dp->power, DP_CTRL_PM))
1314 dp_ctrl_off_link_stream(dp->ctrl);
1315
1316 dp_display_host_deinit(dp);
1317 }
1318
1319 dp->hpd_state = ST_SUSPENDED;
1320
1321 /* host_init will be called at pm_resume */
1322 dp->core_initialized = false;
1323
1324 mutex_unlock(&dp->event_mutex);
1325
1326 return 0;
1327 }
1328
1329 static int dp_pm_prepare(struct device *dev)
1330 {
1331 return 0;
1332 }
1333
1334 static void dp_pm_complete(struct device *dev)
1335 {
1336
1337 }
1338
1339 static const struct dev_pm_ops dp_pm_ops = {
1340 .suspend = dp_pm_suspend,
1341 .resume = dp_pm_resume,
1342 .prepare = dp_pm_prepare,
1343 .complete = dp_pm_complete,
1344 };
1345
1346 static struct platform_driver dp_display_driver = {
1347 .probe = dp_display_probe,
1348 .remove = dp_display_remove,
1349 .driver = {
1350 .name = "msm-dp-display",
1351 .of_match_table = dp_dt_match,
1352 .suppress_bind_attrs = true,
1353 .pm = &dp_pm_ops,
1354 },
1355 };
1356
1357 int __init msm_dp_register(void)
1358 {
1359 int ret;
1360
1361 ret = platform_driver_register(&dp_display_driver);
1362 if (ret)
1363 DRM_ERROR("Dp display driver register failed");
1364
1365 return ret;
1366 }
1367
1368 void __exit msm_dp_unregister(void)
1369 {
1370 platform_driver_unregister(&dp_display_driver);
1371 }
1372
1373 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1374 {
1375 struct dp_display_private *dp;
1376
1377 if (!dp_display)
1378 return;
1379
1380 dp = container_of(dp_display, struct dp_display_private, dp_display);
1381
1382 dp_hpd_event_setup(dp);
1383
1384 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1385 }
1386
1387 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1388 {
1389 struct dp_display_private *dp;
1390 struct device *dev;
1391 int rc;
1392
1393 dp = container_of(dp_display, struct dp_display_private, dp_display);
1394 dev = &dp->pdev->dev;
1395
1396 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1397 dp->link, &dp->dp_display.connector,
1398 minor);
1399 if (IS_ERR(dp->debug)) {
1400 rc = PTR_ERR(dp->debug);
1401 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1402 dp->debug = NULL;
1403 }
1404 }
1405
1406 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1407 struct drm_encoder *encoder)
1408 {
1409 struct msm_drm_private *priv;
1410 int ret;
1411
1412 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1413 return -EINVAL;
1414
1415 priv = dev->dev_private;
1416 dp_display->drm_dev = dev;
1417
1418 ret = dp_display_request_irq(dp_display);
1419 if (ret) {
1420 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1421 return ret;
1422 }
1423
1424 dp_display->encoder = encoder;
1425
1426 dp_display->connector = dp_drm_connector_init(dp_display);
1427 if (IS_ERR(dp_display->connector)) {
1428 ret = PTR_ERR(dp_display->connector);
1429 DRM_DEV_ERROR(dev->dev,
1430 "failed to create dp connector: %d\n", ret);
1431 dp_display->connector = NULL;
1432 return ret;
1433 }
1434
1435 priv->connectors[priv->num_connectors++] = dp_display->connector;
1436 return 0;
1437 }
1438
1439 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1440 {
1441 int rc = 0;
1442 struct dp_display_private *dp_display;
1443 u32 state;
1444
1445 dp_display = container_of(dp, struct dp_display_private, dp_display);
1446 if (!dp_display->dp_mode.drm_mode.clock) {
1447 DRM_ERROR("invalid params\n");
1448 return -EINVAL;
1449 }
1450
1451 mutex_lock(&dp_display->event_mutex);
1452
1453 /* stop sentinel checking */
1454 dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1455
1456 rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1457 if (rc) {
1458 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1459 mutex_unlock(&dp_display->event_mutex);
1460 return rc;
1461 }
1462
1463 rc = dp_display_prepare(dp);
1464 if (rc) {
1465 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1466 mutex_unlock(&dp_display->event_mutex);
1467 return rc;
1468 }
1469
1470 state = dp_display->hpd_state;
1471
1472 if (state == ST_DISPLAY_OFF)
1473 dp_display_host_init(dp_display, true);
1474
1475 dp_display_enable(dp_display, 0);
1476
1477 rc = dp_display_post_enable(dp);
1478 if (rc) {
1479 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1480 dp_display_disable(dp_display, 0);
1481 dp_display_unprepare(dp);
1482 }
1483
1484 /* manual kick off plug event to train link */
1485 if (state == ST_DISPLAY_OFF)
1486 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1487
1488 /* completed connection */
1489 dp_display->hpd_state = ST_CONNECTED;
1490
1491 mutex_unlock(&dp_display->event_mutex);
1492
1493 return rc;
1494 }
1495
1496 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1497 {
1498 struct dp_display_private *dp_display;
1499
1500 dp_display = container_of(dp, struct dp_display_private, dp_display);
1501
1502 dp_ctrl_push_idle(dp_display->ctrl);
1503
1504 return 0;
1505 }
1506
1507 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1508 {
1509 int rc = 0;
1510 u32 state;
1511 struct dp_display_private *dp_display;
1512
1513 dp_display = container_of(dp, struct dp_display_private, dp_display);
1514
1515 mutex_lock(&dp_display->event_mutex);
1516
1517 /* stop sentinel checking */
1518 dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1519
1520 dp_display_disable(dp_display, 0);
1521
1522 rc = dp_display_unprepare(dp);
1523 if (rc)
1524 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1525
1526 state = dp_display->hpd_state;
1527 if (state == ST_DISCONNECT_PENDING) {
1528 /* completed disconnection */
1529 dp_display->hpd_state = ST_DISCONNECTED;
1530 } else {
1531 dp_display->hpd_state = ST_DISPLAY_OFF;
1532 }
1533
1534 mutex_unlock(&dp_display->event_mutex);
1535 return rc;
1536 }
1537
1538 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1539 struct drm_display_mode *mode,
1540 struct drm_display_mode *adjusted_mode)
1541 {
1542 struct dp_display_private *dp_display;
1543
1544 dp_display = container_of(dp, struct dp_display_private, dp_display);
1545
1546 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1547
1548 if (dp_display_check_video_test(dp))
1549 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1550 else /* Default num_components per pixel = 3 */
1551 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1552
1553 if (!dp_display->dp_mode.bpp)
1554 dp_display->dp_mode.bpp = 24; /* Default bpp */
1555
1556 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1557
1558 dp_display->dp_mode.v_active_low =
1559 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1560
1561 dp_display->dp_mode.h_active_low =
1562 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1563 }
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