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_SUSPEND_PENDING,
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 atomic_t 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 completion resume_comp;
118
119 struct dp_audio *audio;
120 };
121
122 static const struct of_device_id dp_dt_match[] = {
123 {.compatible = "qcom,sc7180-dp"},
124 {}
125 };
126
dp_add_event(struct dp_display_private * dp_priv,u32 event,u32 data,u32 delay)127 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
128 u32 data, u32 delay)
129 {
130 unsigned long flag;
131 struct dp_event *todo;
132 int pndx;
133
134 spin_lock_irqsave(&dp_priv->event_lock, flag);
135 pndx = dp_priv->event_pndx + 1;
136 pndx %= DP_EVENT_Q_MAX;
137 if (pndx == dp_priv->event_gndx) {
138 pr_err("event_q is full: pndx=%d gndx=%d\n",
139 dp_priv->event_pndx, dp_priv->event_gndx);
140 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
141 return -EPERM;
142 }
143 todo = &dp_priv->event_list[dp_priv->event_pndx++];
144 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
145 todo->event_id = event;
146 todo->data = data;
147 todo->delay = delay;
148 wake_up(&dp_priv->event_q);
149 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
150
151 return 0;
152 }
153
dp_del_event(struct dp_display_private * dp_priv,u32 event)154 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
155 {
156 unsigned long flag;
157 struct dp_event *todo;
158 u32 gndx;
159
160 spin_lock_irqsave(&dp_priv->event_lock, flag);
161 if (dp_priv->event_pndx == dp_priv->event_gndx) {
162 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
163 return -ENOENT;
164 }
165
166 gndx = dp_priv->event_gndx;
167 while (dp_priv->event_pndx != gndx) {
168 todo = &dp_priv->event_list[gndx];
169 if (todo->event_id == event) {
170 todo->event_id = EV_NO_EVENT; /* deleted */
171 todo->delay = 0;
172 }
173 gndx++;
174 gndx %= DP_EVENT_Q_MAX;
175 }
176 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
177
178 return 0;
179 }
180
dp_display_signal_audio_complete(struct msm_dp * dp_display)181 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
182 {
183 struct dp_display_private *dp;
184
185 dp = container_of(dp_display, struct dp_display_private, dp_display);
186
187 complete_all(&dp->audio_comp);
188 }
189
dp_display_bind(struct device * dev,struct device * master,void * data)190 static int dp_display_bind(struct device *dev, struct device *master,
191 void *data)
192 {
193 int rc = 0;
194 struct dp_display_private *dp;
195 struct drm_device *drm;
196 struct msm_drm_private *priv;
197
198 drm = dev_get_drvdata(master);
199
200 dp = container_of(g_dp_display,
201 struct dp_display_private, dp_display);
202 if (!dp) {
203 DRM_ERROR("DP driver bind failed. Invalid driver data\n");
204 return -EINVAL;
205 }
206
207 dp->dp_display.drm_dev = drm;
208 priv = drm->dev_private;
209 priv->dp = &(dp->dp_display);
210
211 rc = dp->parser->parse(dp->parser);
212 if (rc) {
213 DRM_ERROR("device tree parsing failed\n");
214 goto end;
215 }
216
217 rc = dp_aux_register(dp->aux);
218 if (rc) {
219 DRM_ERROR("DRM DP AUX register failed\n");
220 goto end;
221 }
222
223 rc = dp_power_client_init(dp->power);
224 if (rc) {
225 DRM_ERROR("Power client create failed\n");
226 goto end;
227 }
228
229 rc = dp_register_audio_driver(dev, dp->audio);
230 if (rc)
231 DRM_ERROR("Audio registration Dp failed\n");
232
233 end:
234 return rc;
235 }
236
dp_display_unbind(struct device * dev,struct device * master,void * data)237 static void dp_display_unbind(struct device *dev, struct device *master,
238 void *data)
239 {
240 struct dp_display_private *dp;
241 struct drm_device *drm = dev_get_drvdata(master);
242 struct msm_drm_private *priv = drm->dev_private;
243
244 dp = container_of(g_dp_display,
245 struct dp_display_private, dp_display);
246 if (!dp) {
247 DRM_ERROR("Invalid DP driver data\n");
248 return;
249 }
250
251 dp_power_client_deinit(dp->power);
252 dp_aux_unregister(dp->aux);
253 priv->dp = NULL;
254 }
255
256 static const struct component_ops dp_display_comp_ops = {
257 .bind = dp_display_bind,
258 .unbind = dp_display_unbind,
259 };
260
dp_display_is_ds_bridge(struct dp_panel * panel)261 static bool dp_display_is_ds_bridge(struct dp_panel *panel)
262 {
263 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
264 DP_DWN_STRM_PORT_PRESENT);
265 }
266
dp_display_is_sink_count_zero(struct dp_display_private * dp)267 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
268 {
269 return dp_display_is_ds_bridge(dp->panel) &&
270 (dp->link->sink_count == 0);
271 }
272
dp_display_send_hpd_event(struct msm_dp * dp_display)273 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
274 {
275 struct dp_display_private *dp;
276 struct drm_connector *connector;
277
278 dp = container_of(dp_display, struct dp_display_private, dp_display);
279
280 connector = dp->dp_display.connector;
281 drm_helper_hpd_irq_event(connector->dev);
282 }
283
dp_display_send_hpd_notification(struct dp_display_private * dp,bool hpd)284 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
285 bool hpd)
286 {
287 static bool encoder_mode_set;
288 struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private;
289 struct msm_kms *kms = priv->kms;
290
291 if ((hpd && dp->dp_display.is_connected) ||
292 (!hpd && !dp->dp_display.is_connected)) {
293 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
294 return 0;
295 }
296
297 /* reset video pattern flag on disconnect */
298 if (!hpd)
299 dp->panel->video_test = false;
300
301 dp->dp_display.is_connected = hpd;
302
303 if (dp->dp_display.is_connected && dp->dp_display.encoder
304 && !encoder_mode_set
305 && kms->funcs->set_encoder_mode) {
306 kms->funcs->set_encoder_mode(kms,
307 dp->dp_display.encoder, false);
308 DRM_DEBUG_DP("set_encoder_mode() Completed\n");
309 encoder_mode_set = true;
310 }
311
312 dp_display_send_hpd_event(&dp->dp_display);
313
314 return 0;
315 }
316
dp_display_process_hpd_high(struct dp_display_private * dp)317 static int dp_display_process_hpd_high(struct dp_display_private *dp)
318 {
319 int rc = 0;
320 struct edid *edid;
321
322 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
323
324 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
325 if (rc)
326 goto end;
327
328 dp_link_process_request(dp->link);
329
330 edid = dp->panel->edid;
331
332 dp->audio_supported = drm_detect_monitor_audio(edid);
333 dp_panel_handle_sink_request(dp->panel);
334
335 dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
336 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
337
338 rc = dp_ctrl_on_link(dp->ctrl);
339 if (rc) {
340 DRM_ERROR("failed to complete DP link training\n");
341 goto end;
342 }
343
344 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
345
346
347 end:
348 return rc;
349 }
350
dp_display_host_init(struct dp_display_private * dp)351 static void dp_display_host_init(struct dp_display_private *dp)
352 {
353 bool flip = false;
354
355 if (dp->core_initialized) {
356 DRM_DEBUG_DP("DP core already initialized\n");
357 return;
358 }
359
360 if (dp->usbpd->orientation == ORIENTATION_CC2)
361 flip = true;
362
363 dp_power_init(dp->power, flip);
364 dp_ctrl_host_init(dp->ctrl, flip);
365 dp_aux_init(dp->aux);
366 dp->core_initialized = true;
367 }
368
dp_display_usbpd_configure_cb(struct device * dev)369 static int dp_display_usbpd_configure_cb(struct device *dev)
370 {
371 int rc = 0;
372 struct dp_display_private *dp;
373
374 if (!dev) {
375 DRM_ERROR("invalid dev\n");
376 rc = -EINVAL;
377 goto end;
378 }
379
380 dp = container_of(g_dp_display,
381 struct dp_display_private, dp_display);
382 if (!dp) {
383 DRM_ERROR("no driver data found\n");
384 rc = -ENODEV;
385 goto end;
386 }
387
388 dp_display_host_init(dp);
389
390 /*
391 * set sink to normal operation mode -- D0
392 * before dpcd read
393 */
394 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
395 rc = dp_display_process_hpd_high(dp);
396 end:
397 return rc;
398 }
399
dp_display_usbpd_disconnect_cb(struct device * dev)400 static int dp_display_usbpd_disconnect_cb(struct device *dev)
401 {
402 int rc = 0;
403 struct dp_display_private *dp;
404
405 if (!dev) {
406 DRM_ERROR("invalid dev\n");
407 rc = -EINVAL;
408 return rc;
409 }
410
411 dp = container_of(g_dp_display,
412 struct dp_display_private, dp_display);
413 if (!dp) {
414 DRM_ERROR("no driver data found\n");
415 rc = -ENODEV;
416 return rc;
417 }
418
419 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
420
421 return rc;
422 }
423
dp_display_handle_video_request(struct dp_display_private * dp)424 static void dp_display_handle_video_request(struct dp_display_private *dp)
425 {
426 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
427 dp->panel->video_test = true;
428 dp_link_send_test_response(dp->link);
429 }
430 }
431
dp_display_handle_irq_hpd(struct dp_display_private * dp)432 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
433 {
434 u32 sink_request;
435
436 sink_request = dp->link->sink_request;
437
438 if (sink_request & DS_PORT_STATUS_CHANGED) {
439 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
440 if (dp_display_is_sink_count_zero(dp)) {
441 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
442 return 0;
443 }
444
445 return dp_display_process_hpd_high(dp);
446 }
447
448 dp_ctrl_handle_sink_request(dp->ctrl);
449
450 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN)
451 dp_display_handle_video_request(dp);
452
453 return 0;
454 }
455
dp_display_usbpd_attention_cb(struct device * dev)456 static int dp_display_usbpd_attention_cb(struct device *dev)
457 {
458 int rc = 0;
459 struct dp_display_private *dp;
460
461 if (!dev) {
462 DRM_ERROR("invalid dev\n");
463 return -EINVAL;
464 }
465
466 dp = container_of(g_dp_display,
467 struct dp_display_private, dp_display);
468 if (!dp) {
469 DRM_ERROR("no driver data found\n");
470 return -ENODEV;
471 }
472
473 /* check for any test request issued by sink */
474 rc = dp_link_process_request(dp->link);
475 if (!rc)
476 dp_display_handle_irq_hpd(dp);
477
478 return rc;
479 }
480
dp_hpd_plug_handle(struct dp_display_private * dp,u32 data)481 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
482 {
483 struct dp_usbpd *hpd = dp->usbpd;
484 u32 state;
485 u32 tout = DP_TIMEOUT_5_SECOND;
486 int ret;
487
488 if (!hpd)
489 return 0;
490
491 mutex_lock(&dp->event_mutex);
492
493 state = atomic_read(&dp->hpd_state);
494 if (state == ST_SUSPEND_PENDING) {
495 mutex_unlock(&dp->event_mutex);
496 return 0;
497 }
498
499 if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
500 mutex_unlock(&dp->event_mutex);
501 return 0;
502 }
503
504 if (state == ST_DISCONNECT_PENDING) {
505 /* wait until ST_DISCONNECTED */
506 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
507 mutex_unlock(&dp->event_mutex);
508 return 0;
509 }
510
511 if (state == ST_SUSPENDED)
512 tout = DP_TIMEOUT_NONE;
513
514 atomic_set(&dp->hpd_state, ST_CONNECT_PENDING);
515
516 hpd->hpd_high = 1;
517
518 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
519 if (ret) { /* failed */
520 hpd->hpd_high = 0;
521 atomic_set(&dp->hpd_state, ST_DISCONNECTED);
522 }
523
524 /* start sanity checking */
525 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
526
527 mutex_unlock(&dp->event_mutex);
528
529 /* uevent will complete connection part */
530 return 0;
531 };
532
533 static int dp_display_enable(struct dp_display_private *dp, u32 data);
534 static int dp_display_disable(struct dp_display_private *dp, u32 data);
535
dp_connect_pending_timeout(struct dp_display_private * dp,u32 data)536 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
537 {
538 u32 state;
539
540 mutex_lock(&dp->event_mutex);
541
542 state = atomic_read(&dp->hpd_state);
543 if (state == ST_CONNECT_PENDING) {
544 dp_display_enable(dp, 0);
545 atomic_set(&dp->hpd_state, ST_CONNECTED);
546 }
547
548 mutex_unlock(&dp->event_mutex);
549
550 return 0;
551 }
552
dp_display_handle_plugged_change(struct msm_dp * dp_display,bool plugged)553 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
554 bool plugged)
555 {
556 if (dp_display->plugged_cb && dp_display->codec_dev)
557 dp_display->plugged_cb(dp_display->codec_dev, plugged);
558 }
559
dp_hpd_unplug_handle(struct dp_display_private * dp,u32 data)560 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
561 {
562 struct dp_usbpd *hpd = dp->usbpd;
563 u32 state;
564
565 if (!hpd)
566 return 0;
567
568 mutex_lock(&dp->event_mutex);
569
570 state = atomic_read(&dp->hpd_state);
571 if (state == ST_SUSPEND_PENDING) {
572 mutex_unlock(&dp->event_mutex);
573 return 0;
574 }
575
576 if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) {
577 mutex_unlock(&dp->event_mutex);
578 return 0;
579 }
580
581 if (state == ST_CONNECT_PENDING) {
582 /* wait until CONNECTED */
583 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
584 mutex_unlock(&dp->event_mutex);
585 return 0;
586 }
587
588 atomic_set(&dp->hpd_state, ST_DISCONNECT_PENDING);
589
590 /* disable HPD plug interrupt until disconnect is done */
591 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK
592 | DP_DP_IRQ_HPD_INT_MASK, false);
593
594 hpd->hpd_high = 0;
595
596 /*
597 * We don't need separate work for disconnect as
598 * connect/attention interrupts are disabled
599 */
600 dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
601
602 /* start sanity checking */
603 dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
604
605 /* signal the disconnect event early to ensure proper teardown */
606 dp_display_handle_plugged_change(g_dp_display, false);
607 reinit_completion(&dp->audio_comp);
608
609 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK |
610 DP_DP_IRQ_HPD_INT_MASK, true);
611
612 /* uevent will complete disconnection part */
613 mutex_unlock(&dp->event_mutex);
614 return 0;
615 }
616
dp_disconnect_pending_timeout(struct dp_display_private * dp,u32 data)617 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
618 {
619 u32 state;
620
621 mutex_lock(&dp->event_mutex);
622
623 state = atomic_read(&dp->hpd_state);
624 if (state == ST_DISCONNECT_PENDING) {
625 dp_display_disable(dp, 0);
626 atomic_set(&dp->hpd_state, ST_DISCONNECTED);
627 }
628
629 mutex_unlock(&dp->event_mutex);
630
631 return 0;
632 }
633
dp_irq_hpd_handle(struct dp_display_private * dp,u32 data)634 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
635 {
636 u32 state;
637
638 mutex_lock(&dp->event_mutex);
639
640 /* irq_hpd can happen at either connected or disconnected state */
641 state = atomic_read(&dp->hpd_state);
642 if (state == ST_SUSPEND_PENDING) {
643 mutex_unlock(&dp->event_mutex);
644 return 0;
645 }
646
647 dp_display_usbpd_attention_cb(&dp->pdev->dev);
648
649 mutex_unlock(&dp->event_mutex);
650
651 return 0;
652 }
653
dp_display_deinit_sub_modules(struct dp_display_private * dp)654 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
655 {
656 dp_debug_put(dp->debug);
657 dp_ctrl_put(dp->ctrl);
658 dp_panel_put(dp->panel);
659 dp_aux_put(dp->aux);
660 dp_audio_put(dp->audio);
661 }
662
dp_init_sub_modules(struct dp_display_private * dp)663 static int dp_init_sub_modules(struct dp_display_private *dp)
664 {
665 int rc = 0;
666 struct device *dev = &dp->pdev->dev;
667 struct dp_usbpd_cb *cb = &dp->usbpd_cb;
668 struct dp_panel_in panel_in = {
669 .dev = dev,
670 };
671
672 /* Callback APIs used for cable status change event */
673 cb->configure = dp_display_usbpd_configure_cb;
674 cb->disconnect = dp_display_usbpd_disconnect_cb;
675 cb->attention = dp_display_usbpd_attention_cb;
676
677 dp->usbpd = dp_hpd_get(dev, cb);
678 if (IS_ERR(dp->usbpd)) {
679 rc = PTR_ERR(dp->usbpd);
680 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
681 dp->usbpd = NULL;
682 goto error;
683 }
684
685 dp->parser = dp_parser_get(dp->pdev);
686 if (IS_ERR(dp->parser)) {
687 rc = PTR_ERR(dp->parser);
688 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
689 dp->parser = NULL;
690 goto error;
691 }
692
693 dp->catalog = dp_catalog_get(dev, &dp->parser->io);
694 if (IS_ERR(dp->catalog)) {
695 rc = PTR_ERR(dp->catalog);
696 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
697 dp->catalog = NULL;
698 goto error;
699 }
700
701 dp->power = dp_power_get(dp->parser);
702 if (IS_ERR(dp->power)) {
703 rc = PTR_ERR(dp->power);
704 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
705 dp->power = NULL;
706 goto error;
707 }
708
709 dp->aux = dp_aux_get(dev, dp->catalog);
710 if (IS_ERR(dp->aux)) {
711 rc = PTR_ERR(dp->aux);
712 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
713 dp->aux = NULL;
714 goto error;
715 }
716
717 dp->link = dp_link_get(dev, dp->aux);
718 if (IS_ERR(dp->link)) {
719 rc = PTR_ERR(dp->link);
720 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
721 dp->link = NULL;
722 goto error_link;
723 }
724
725 panel_in.aux = dp->aux;
726 panel_in.catalog = dp->catalog;
727 panel_in.link = dp->link;
728
729 dp->panel = dp_panel_get(&panel_in);
730 if (IS_ERR(dp->panel)) {
731 rc = PTR_ERR(dp->panel);
732 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
733 dp->panel = NULL;
734 goto error_link;
735 }
736
737 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
738 dp->power, dp->catalog, dp->parser);
739 if (IS_ERR(dp->ctrl)) {
740 rc = PTR_ERR(dp->ctrl);
741 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
742 dp->ctrl = NULL;
743 goto error_ctrl;
744 }
745
746 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
747 if (IS_ERR(dp->audio)) {
748 rc = PTR_ERR(dp->audio);
749 pr_err("failed to initialize audio, rc = %d\n", rc);
750 dp->audio = NULL;
751 goto error_audio;
752 }
753
754 return rc;
755
756 error_audio:
757 dp_ctrl_put(dp->ctrl);
758 error_ctrl:
759 dp_panel_put(dp->panel);
760 error_link:
761 dp_aux_put(dp->aux);
762 error:
763 return rc;
764 }
765
dp_display_set_mode(struct msm_dp * dp_display,struct dp_display_mode * mode)766 static int dp_display_set_mode(struct msm_dp *dp_display,
767 struct dp_display_mode *mode)
768 {
769 struct dp_display_private *dp;
770
771 dp = container_of(dp_display, struct dp_display_private, dp_display);
772
773 dp->panel->dp_mode.drm_mode = mode->drm_mode;
774 dp->panel->dp_mode.bpp = mode->bpp;
775 dp->panel->dp_mode.capabilities = mode->capabilities;
776 dp_panel_init_panel_info(dp->panel);
777 return 0;
778 }
779
dp_display_prepare(struct msm_dp * dp)780 static int dp_display_prepare(struct msm_dp *dp)
781 {
782 return 0;
783 }
784
dp_display_enable(struct dp_display_private * dp,u32 data)785 static int dp_display_enable(struct dp_display_private *dp, u32 data)
786 {
787 int rc = 0;
788 struct msm_dp *dp_display;
789
790 dp_display = g_dp_display;
791
792 if (dp_display->power_on) {
793 DRM_DEBUG_DP("Link already setup, return\n");
794 return 0;
795 }
796
797 rc = dp_ctrl_on_stream(dp->ctrl);
798 if (!rc)
799 dp_display->power_on = true;
800
801 /* complete resume_comp regardless it is armed or not */
802 complete(&dp->resume_comp);
803 return rc;
804 }
805
dp_display_post_enable(struct msm_dp * dp_display)806 static int dp_display_post_enable(struct msm_dp *dp_display)
807 {
808 struct dp_display_private *dp;
809 u32 rate;
810
811 dp = container_of(dp_display, struct dp_display_private, dp_display);
812
813 rate = dp->link->link_params.rate;
814
815 if (dp->audio_supported) {
816 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
817 dp->audio->lane_count = dp->link->link_params.num_lanes;
818 }
819
820 /* signal the connect event late to synchronize video and display */
821 dp_display_handle_plugged_change(dp_display, true);
822 return 0;
823 }
824
dp_display_disable(struct dp_display_private * dp,u32 data)825 static int dp_display_disable(struct dp_display_private *dp, u32 data)
826 {
827 struct msm_dp *dp_display;
828
829 dp_display = g_dp_display;
830
831 if (!dp_display->power_on)
832 return -EINVAL;
833
834 /* wait only if audio was enabled */
835 if (dp_display->audio_enabled) {
836 if (!wait_for_completion_timeout(&dp->audio_comp,
837 HZ * 5))
838 DRM_ERROR("audio comp timeout\n");
839 }
840
841 dp_display->audio_enabled = false;
842
843 dp_ctrl_off(dp->ctrl);
844
845 dp->core_initialized = false;
846
847 dp_display->power_on = false;
848
849 return 0;
850 }
851
dp_display_unprepare(struct msm_dp * dp)852 static int dp_display_unprepare(struct msm_dp *dp)
853 {
854 return 0;
855 }
856
dp_display_set_plugged_cb(struct msm_dp * dp_display,hdmi_codec_plugged_cb fn,struct device * codec_dev)857 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
858 hdmi_codec_plugged_cb fn, struct device *codec_dev)
859 {
860 bool plugged;
861
862 dp_display->plugged_cb = fn;
863 dp_display->codec_dev = codec_dev;
864 plugged = dp_display->is_connected;
865 dp_display_handle_plugged_change(dp_display, plugged);
866
867 return 0;
868 }
869
dp_display_validate_mode(struct msm_dp * dp,u32 mode_pclk_khz)870 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
871 {
872 const u32 num_components = 3, default_bpp = 24;
873 struct dp_display_private *dp_display;
874 struct dp_link_info *link_info;
875 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
876
877 if (!dp || !mode_pclk_khz || !dp->connector) {
878 DRM_ERROR("invalid params\n");
879 return -EINVAL;
880 }
881
882 dp_display = container_of(dp, struct dp_display_private, dp_display);
883 link_info = &dp_display->panel->link_info;
884
885 mode_bpp = dp->connector->display_info.bpc * num_components;
886 if (!mode_bpp)
887 mode_bpp = default_bpp;
888
889 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
890 mode_bpp, mode_pclk_khz);
891
892 mode_rate_khz = mode_pclk_khz * mode_bpp;
893 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
894
895 if (mode_rate_khz > supported_rate_khz)
896 return MODE_BAD;
897
898 return MODE_OK;
899 }
900
dp_display_get_modes(struct msm_dp * dp,struct dp_display_mode * dp_mode)901 int dp_display_get_modes(struct msm_dp *dp,
902 struct dp_display_mode *dp_mode)
903 {
904 struct dp_display_private *dp_display;
905 int ret = 0;
906
907 if (!dp) {
908 DRM_ERROR("invalid params\n");
909 return 0;
910 }
911
912 dp_display = container_of(dp, struct dp_display_private, dp_display);
913
914 ret = dp_panel_get_modes(dp_display->panel,
915 dp->connector, dp_mode);
916 if (dp_mode->drm_mode.clock)
917 dp->max_pclk_khz = dp_mode->drm_mode.clock;
918 return ret;
919 }
920
dp_display_check_video_test(struct msm_dp * dp)921 bool dp_display_check_video_test(struct msm_dp *dp)
922 {
923 struct dp_display_private *dp_display;
924
925 dp_display = container_of(dp, struct dp_display_private, dp_display);
926
927 return dp_display->panel->video_test;
928 }
929
dp_display_get_test_bpp(struct msm_dp * dp)930 int dp_display_get_test_bpp(struct msm_dp *dp)
931 {
932 struct dp_display_private *dp_display;
933
934 if (!dp) {
935 DRM_ERROR("invalid params\n");
936 return 0;
937 }
938
939 dp_display = container_of(dp, struct dp_display_private, dp_display);
940
941 return dp_link_bit_depth_to_bpp(
942 dp_display->link->test_video.test_bit_depth);
943 }
944
dp_display_config_hpd(struct dp_display_private * dp)945 static void dp_display_config_hpd(struct dp_display_private *dp)
946 {
947
948 dp_display_host_init(dp);
949 dp_catalog_ctrl_hpd_config(dp->catalog);
950
951 /* Enable interrupt first time
952 * we are leaving dp clocks on during disconnect
953 * and never disable interrupt
954 */
955 enable_irq(dp->irq);
956 }
957
hpd_event_thread(void * data)958 static int hpd_event_thread(void *data)
959 {
960 struct dp_display_private *dp_priv;
961 unsigned long flag;
962 struct dp_event *todo;
963 int timeout_mode = 0;
964
965 dp_priv = (struct dp_display_private *)data;
966
967 while (1) {
968 if (timeout_mode) {
969 wait_event_timeout(dp_priv->event_q,
970 (dp_priv->event_pndx == dp_priv->event_gndx),
971 EVENT_TIMEOUT);
972 } else {
973 wait_event_interruptible(dp_priv->event_q,
974 (dp_priv->event_pndx != dp_priv->event_gndx));
975 }
976 spin_lock_irqsave(&dp_priv->event_lock, flag);
977 todo = &dp_priv->event_list[dp_priv->event_gndx];
978 if (todo->delay) {
979 struct dp_event *todo_next;
980
981 dp_priv->event_gndx++;
982 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
983
984 /* re enter delay event into q */
985 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
986 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
987 todo_next->event_id = todo->event_id;
988 todo_next->data = todo->data;
989 todo_next->delay = todo->delay - 1;
990
991 /* clean up older event */
992 todo->event_id = EV_NO_EVENT;
993 todo->delay = 0;
994
995 /* switch to timeout mode */
996 timeout_mode = 1;
997 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
998 continue;
999 }
1000
1001 /* timeout with no events in q */
1002 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1003 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1004 continue;
1005 }
1006
1007 dp_priv->event_gndx++;
1008 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1009 timeout_mode = 0;
1010 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1011
1012 switch (todo->event_id) {
1013 case EV_HPD_INIT_SETUP:
1014 dp_display_config_hpd(dp_priv);
1015 break;
1016 case EV_HPD_PLUG_INT:
1017 dp_hpd_plug_handle(dp_priv, todo->data);
1018 break;
1019 case EV_HPD_UNPLUG_INT:
1020 dp_hpd_unplug_handle(dp_priv, todo->data);
1021 break;
1022 case EV_IRQ_HPD_INT:
1023 dp_irq_hpd_handle(dp_priv, todo->data);
1024 break;
1025 case EV_HPD_REPLUG_INT:
1026 /* do nothing */
1027 break;
1028 case EV_USER_NOTIFICATION:
1029 dp_display_send_hpd_notification(dp_priv,
1030 todo->data);
1031 break;
1032 case EV_CONNECT_PENDING_TIMEOUT:
1033 dp_connect_pending_timeout(dp_priv,
1034 todo->data);
1035 break;
1036 case EV_DISCONNECT_PENDING_TIMEOUT:
1037 dp_disconnect_pending_timeout(dp_priv,
1038 todo->data);
1039 break;
1040 default:
1041 break;
1042 }
1043 }
1044
1045 return 0;
1046 }
1047
dp_hpd_event_setup(struct dp_display_private * dp_priv)1048 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1049 {
1050 init_waitqueue_head(&dp_priv->event_q);
1051 spin_lock_init(&dp_priv->event_lock);
1052
1053 kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1054 }
1055
dp_display_irq_handler(int irq,void * dev_id)1056 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1057 {
1058 struct dp_display_private *dp = dev_id;
1059 irqreturn_t ret = IRQ_HANDLED;
1060 u32 hpd_isr_status;
1061
1062 if (!dp) {
1063 DRM_ERROR("invalid data\n");
1064 return IRQ_NONE;
1065 }
1066
1067 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1068
1069 if (hpd_isr_status & 0x0F) {
1070 /* hpd related interrupts */
1071 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1072 hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1073 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1074 }
1075
1076 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1077 /* delete connect pending event first */
1078 dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1079 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1080 }
1081
1082 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1083 dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1084
1085 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1086 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1087 }
1088
1089 /* DP controller isr */
1090 dp_ctrl_isr(dp->ctrl);
1091
1092 /* DP aux isr */
1093 dp_aux_isr(dp->aux);
1094
1095 return ret;
1096 }
1097
dp_display_request_irq(struct msm_dp * dp_display)1098 int dp_display_request_irq(struct msm_dp *dp_display)
1099 {
1100 int rc = 0;
1101 struct dp_display_private *dp;
1102
1103 if (!dp_display) {
1104 DRM_ERROR("invalid input\n");
1105 return -EINVAL;
1106 }
1107
1108 dp = container_of(dp_display, struct dp_display_private, dp_display);
1109
1110 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1111 if (dp->irq < 0) {
1112 rc = dp->irq;
1113 DRM_ERROR("failed to get irq: %d\n", rc);
1114 return rc;
1115 }
1116
1117 rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1118 dp_display_irq_handler,
1119 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1120 if (rc < 0) {
1121 DRM_ERROR("failed to request IRQ%u: %d\n",
1122 dp->irq, rc);
1123 return rc;
1124 }
1125 disable_irq(dp->irq);
1126
1127 return 0;
1128 }
1129
dp_display_probe(struct platform_device * pdev)1130 static int dp_display_probe(struct platform_device *pdev)
1131 {
1132 int rc = 0;
1133 struct dp_display_private *dp;
1134
1135 if (!pdev || !pdev->dev.of_node) {
1136 DRM_ERROR("pdev not found\n");
1137 return -ENODEV;
1138 }
1139
1140 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1141 if (!dp)
1142 return -ENOMEM;
1143
1144 dp->pdev = pdev;
1145 dp->name = "drm_dp";
1146
1147 rc = dp_init_sub_modules(dp);
1148 if (rc) {
1149 DRM_ERROR("init sub module failed\n");
1150 return -EPROBE_DEFER;
1151 }
1152
1153 mutex_init(&dp->event_mutex);
1154
1155 init_completion(&dp->resume_comp);
1156
1157 g_dp_display = &dp->dp_display;
1158
1159 /* Store DP audio handle inside DP display */
1160 g_dp_display->dp_audio = dp->audio;
1161
1162 init_completion(&dp->audio_comp);
1163
1164 platform_set_drvdata(pdev, g_dp_display);
1165
1166 rc = component_add(&pdev->dev, &dp_display_comp_ops);
1167 if (rc) {
1168 DRM_ERROR("component add failed, rc=%d\n", rc);
1169 dp_display_deinit_sub_modules(dp);
1170 }
1171
1172 return rc;
1173 }
1174
dp_display_remove(struct platform_device * pdev)1175 static int dp_display_remove(struct platform_device *pdev)
1176 {
1177 struct dp_display_private *dp;
1178
1179 dp = container_of(g_dp_display,
1180 struct dp_display_private, dp_display);
1181
1182 dp_display_deinit_sub_modules(dp);
1183
1184 component_del(&pdev->dev, &dp_display_comp_ops);
1185 platform_set_drvdata(pdev, NULL);
1186
1187 return 0;
1188 }
1189
dp_pm_resume(struct device * dev)1190 static int dp_pm_resume(struct device *dev)
1191 {
1192 return 0;
1193 }
1194
dp_pm_suspend(struct device * dev)1195 static int dp_pm_suspend(struct device *dev)
1196 {
1197 struct platform_device *pdev = to_platform_device(dev);
1198 struct dp_display_private *dp = platform_get_drvdata(pdev);
1199
1200 if (!dp) {
1201 DRM_ERROR("DP driver bind failed. Invalid driver data\n");
1202 return -EINVAL;
1203 }
1204
1205 atomic_set(&dp->hpd_state, ST_SUSPENDED);
1206
1207 return 0;
1208 }
1209
dp_pm_prepare(struct device * dev)1210 static int dp_pm_prepare(struct device *dev)
1211 {
1212 return 0;
1213 }
1214
dp_pm_complete(struct device * dev)1215 static void dp_pm_complete(struct device *dev)
1216 {
1217
1218 }
1219
1220 static const struct dev_pm_ops dp_pm_ops = {
1221 .suspend = dp_pm_suspend,
1222 .resume = dp_pm_resume,
1223 .prepare = dp_pm_prepare,
1224 .complete = dp_pm_complete,
1225 };
1226
1227 static struct platform_driver dp_display_driver = {
1228 .probe = dp_display_probe,
1229 .remove = dp_display_remove,
1230 .driver = {
1231 .name = "msm-dp-display",
1232 .of_match_table = dp_dt_match,
1233 .suppress_bind_attrs = true,
1234 .pm = &dp_pm_ops,
1235 },
1236 };
1237
msm_dp_register(void)1238 int __init msm_dp_register(void)
1239 {
1240 int ret;
1241
1242 ret = platform_driver_register(&dp_display_driver);
1243 if (ret)
1244 DRM_ERROR("Dp display driver register failed");
1245
1246 return ret;
1247 }
1248
msm_dp_unregister(void)1249 void __exit msm_dp_unregister(void)
1250 {
1251 platform_driver_unregister(&dp_display_driver);
1252 }
1253
msm_dp_irq_postinstall(struct msm_dp * dp_display)1254 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1255 {
1256 struct dp_display_private *dp;
1257
1258 if (!dp_display)
1259 return;
1260
1261 dp = container_of(dp_display, struct dp_display_private, dp_display);
1262
1263 dp_hpd_event_setup(dp);
1264
1265 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1266 }
1267
msm_dp_debugfs_init(struct msm_dp * dp_display,struct drm_minor * minor)1268 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1269 {
1270 struct dp_display_private *dp;
1271 struct device *dev;
1272 int rc;
1273
1274 dp = container_of(dp_display, struct dp_display_private, dp_display);
1275 dev = &dp->pdev->dev;
1276
1277 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1278 dp->link, &dp->dp_display.connector,
1279 minor);
1280 if (IS_ERR(dp->debug)) {
1281 rc = PTR_ERR(dp->debug);
1282 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1283 dp->debug = NULL;
1284 }
1285 }
1286
msm_dp_modeset_init(struct msm_dp * dp_display,struct drm_device * dev,struct drm_encoder * encoder)1287 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1288 struct drm_encoder *encoder)
1289 {
1290 struct msm_drm_private *priv;
1291 int ret;
1292
1293 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1294 return -EINVAL;
1295
1296 priv = dev->dev_private;
1297 dp_display->drm_dev = dev;
1298
1299 ret = dp_display_request_irq(dp_display);
1300 if (ret) {
1301 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1302 return ret;
1303 }
1304
1305 dp_display->encoder = encoder;
1306
1307 dp_display->connector = dp_drm_connector_init(dp_display);
1308 if (IS_ERR(dp_display->connector)) {
1309 ret = PTR_ERR(dp_display->connector);
1310 DRM_DEV_ERROR(dev->dev,
1311 "failed to create dp connector: %d\n", ret);
1312 dp_display->connector = NULL;
1313 return ret;
1314 }
1315
1316 priv->connectors[priv->num_connectors++] = dp_display->connector;
1317 return 0;
1318 }
1319
dp_display_wait4resume_done(struct dp_display_private * dp)1320 static int dp_display_wait4resume_done(struct dp_display_private *dp)
1321 {
1322 int ret = 0;
1323
1324 reinit_completion(&dp->resume_comp);
1325 if (!wait_for_completion_timeout(&dp->resume_comp,
1326 WAIT_FOR_RESUME_TIMEOUT_JIFFIES)) {
1327 DRM_ERROR("wait4resume_done timedout\n");
1328 ret = -ETIMEDOUT;
1329 }
1330 return ret;
1331 }
1332
msm_dp_display_enable(struct msm_dp * dp,struct drm_encoder * encoder)1333 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1334 {
1335 int rc = 0;
1336 struct dp_display_private *dp_display;
1337 u32 state;
1338
1339 dp_display = container_of(dp, struct dp_display_private, dp_display);
1340 if (!dp_display->dp_mode.drm_mode.clock) {
1341 DRM_ERROR("invalid params\n");
1342 return -EINVAL;
1343 }
1344
1345 mutex_lock(&dp_display->event_mutex);
1346
1347 rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1348 if (rc) {
1349 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1350 mutex_unlock(&dp_display->event_mutex);
1351 return rc;
1352 }
1353
1354 rc = dp_display_prepare(dp);
1355 if (rc) {
1356 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1357 mutex_unlock(&dp_display->event_mutex);
1358 return rc;
1359 }
1360
1361 state = atomic_read(&dp_display->hpd_state);
1362 if (state == ST_SUSPENDED) {
1363 /* start link training */
1364 dp_add_event(dp_display, EV_HPD_PLUG_INT, 0, 0);
1365 mutex_unlock(&dp_display->event_mutex);
1366
1367 /* wait until dp interface is up */
1368 goto resume_done;
1369 }
1370
1371 dp_display_enable(dp_display, 0);
1372
1373 rc = dp_display_post_enable(dp);
1374 if (rc) {
1375 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1376 dp_display_disable(dp_display, 0);
1377 dp_display_unprepare(dp);
1378 }
1379
1380 dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1381
1382 if (state == ST_SUSPEND_PENDING)
1383 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1384
1385 /* completed connection */
1386 atomic_set(&dp_display->hpd_state, ST_CONNECTED);
1387
1388 mutex_unlock(&dp_display->event_mutex);
1389
1390 return rc;
1391
1392 resume_done:
1393 dp_display_wait4resume_done(dp_display);
1394 return rc;
1395 }
1396
msm_dp_display_pre_disable(struct msm_dp * dp,struct drm_encoder * encoder)1397 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1398 {
1399 struct dp_display_private *dp_display;
1400
1401 dp_display = container_of(dp, struct dp_display_private, dp_display);
1402
1403 dp_ctrl_push_idle(dp_display->ctrl);
1404
1405 return 0;
1406 }
1407
msm_dp_display_disable(struct msm_dp * dp,struct drm_encoder * encoder)1408 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1409 {
1410 int rc = 0;
1411 u32 state;
1412 struct dp_display_private *dp_display;
1413
1414 dp_display = container_of(dp, struct dp_display_private, dp_display);
1415
1416 mutex_lock(&dp_display->event_mutex);
1417
1418 dp_display_disable(dp_display, 0);
1419
1420 rc = dp_display_unprepare(dp);
1421 if (rc)
1422 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1423
1424 dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1425
1426 state = atomic_read(&dp_display->hpd_state);
1427 if (state == ST_DISCONNECT_PENDING) {
1428 /* completed disconnection */
1429 atomic_set(&dp_display->hpd_state, ST_DISCONNECTED);
1430 } else {
1431 atomic_set(&dp_display->hpd_state, ST_SUSPEND_PENDING);
1432 }
1433
1434 mutex_unlock(&dp_display->event_mutex);
1435 return rc;
1436 }
1437
msm_dp_display_mode_set(struct msm_dp * dp,struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)1438 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1439 struct drm_display_mode *mode,
1440 struct drm_display_mode *adjusted_mode)
1441 {
1442 struct dp_display_private *dp_display;
1443
1444 dp_display = container_of(dp, struct dp_display_private, dp_display);
1445
1446 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1447
1448 if (dp_display_check_video_test(dp))
1449 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1450 else /* Default num_components per pixel = 3 */
1451 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1452
1453 if (!dp_display->dp_mode.bpp)
1454 dp_display->dp_mode.bpp = 24; /* Default bpp */
1455
1456 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1457
1458 dp_display->dp_mode.v_active_low =
1459 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1460
1461 dp_display->dp_mode.h_active_low =
1462 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1463 }
1464
