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drm/msm/dp: store dp_display in the driver data
[linux-2.6-block.git] / drivers / gpu / drm / msm / dp / dp_display.c
CommitLineData
c943b494
CU		 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>
8ede2ecc 12#include <linux/delay.h>
c943b494
CU		 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"
220b856a 21#include "dp_reg.h"
c943b494
CU		 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"
14975cff 27#include "dp_pll.h"
c943b494
CU		 28
29static struct msm_dp *g_dp_display;
30#define HPD_STRING_SIZE 30
31
8ede2ecc
KH		 32enum {
33 ISR_DISCONNECTED,
34 ISR_CONNECT_PENDING,
35 ISR_CONNECTED,
36 ISR_HPD_REPLUG_COUNT,
37 ISR_IRQ_HPD_PULSE_COUNT,
38 ISR_HPD_LO_GLITH_COUNT,
39};
40
41/* event thread connection state */
42enum {
43 ST_DISCONNECTED,
44 ST_CONNECT_PENDING,
45 ST_CONNECTED,
46 ST_DISCONNECT_PENDING,
47 ST_SUSPEND_PENDING,
48 ST_SUSPENDED,
49};
50
51enum {
52 EV_NO_EVENT,
53 /* hpd events */
54 EV_HPD_INIT_SETUP,
55 EV_HPD_PLUG_INT,
56 EV_IRQ_HPD_INT,
57 EV_HPD_REPLUG_INT,
58 EV_HPD_UNPLUG_INT,
59 EV_USER_NOTIFICATION,
60 EV_CONNECT_PENDING_TIMEOUT,
61 EV_DISCONNECT_PENDING_TIMEOUT,
62};
63
64#define EVENT_TIMEOUT (HZ/10) /* 100ms */
65#define DP_EVENT_Q_MAX 8
66
67#define DP_TIMEOUT_5_SECOND (5000/EVENT_TIMEOUT)
68#define DP_TIMEOUT_NONE 0
69
70#define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
71
72struct dp_event {
73 u32 event_id;
74 u32 data;
75 u32 delay;
76};
77
c943b494
CU		 78struct dp_display_private {
79 char *name;
80 int irq;
81
82 /* state variables */
83 bool core_initialized;
84 bool power_on;
85 bool hpd_irq_on;
86 bool audio_supported;
87
88 struct platform_device *pdev;
89 struct dentry *root;
c943b494
CU		 90
91 struct dp_usbpd *usbpd;
92 struct dp_parser *parser;
14975cff 93 struct msm_dp_pll *pll;
c943b494
CU		 94 struct dp_power *power;
95 struct dp_catalog *catalog;
96 struct drm_dp_aux *aux;
97 struct dp_link *link;
98 struct dp_panel *panel;
99 struct dp_ctrl *ctrl;
8ede2ecc 100 struct dp_debug *debug;
c943b494
CU		 101
102 struct dp_usbpd_cb usbpd_cb;
103 struct dp_display_mode dp_mode;
104 struct msm_dp dp_display;
220b856a 105
8ede2ecc
KH		 106 /* event related only access by event thread */
107 struct mutex event_mutex;
108 wait_queue_head_t event_q;
109 atomic_t hpd_state;
110 u32 event_pndx;
111 u32 event_gndx;
112 struct dp_event event_list[DP_EVENT_Q_MAX];
113 spinlock_t event_lock;
114
115 struct completion resume_comp;
c943b494
CU		 116};
117
118static const struct of_device_id dp_dt_match[] = {
119 {.compatible = "qcom,sc7180-dp"},
120 {}
121};
122
8ede2ecc
KH		 123static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
124 u32 data, u32 delay)
c943b494 125{
8ede2ecc
KH		 126 unsigned long flag;
127 struct dp_event *todo;
128 int pndx;
129
130 spin_lock_irqsave(&dp_priv->event_lock, flag);
131 pndx = dp_priv->event_pndx + 1;
132 pndx %= DP_EVENT_Q_MAX;
133 if (pndx == dp_priv->event_gndx) {
134 pr_err("event_q is full: pndx=%d gndx=%d\n",
135 dp_priv->event_pndx, dp_priv->event_gndx);
136 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
137 return -EPERM;
220b856a 138 }
8ede2ecc
KH		 139 todo = &dp_priv->event_list[dp_priv->event_pndx++];
140 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
141 todo->event_id = event;
142 todo->data = data;
143 todo->delay = delay;
144 wake_up(&dp_priv->event_q);
145 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
c943b494 146
8ede2ecc 147 return 0;
220b856a
TS		 148}
149
8ede2ecc 150static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
220b856a 151{
8ede2ecc
KH		 152 unsigned long flag;
153 struct dp_event *todo;
154 u32 gndx;
155
156 spin_lock_irqsave(&dp_priv->event_lock, flag);
157 if (dp_priv->event_pndx == dp_priv->event_gndx) {
158 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
159 return -ENOENT;
160 }
220b856a 161
8ede2ecc
KH		 162 gndx = dp_priv->event_gndx;
163 while (dp_priv->event_pndx != gndx) {
164 todo = &dp_priv->event_list[gndx];
165 if (todo->event_id == event) {
166 todo->event_id = EV_NO_EVENT; /* deleted */
167 todo->delay = 0;
168 }
169 gndx++;
170 gndx %= DP_EVENT_Q_MAX;
220b856a 171 }
8ede2ecc 172 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
220b856a 173
8ede2ecc 174 return 0;
c943b494
CU		 175}
176
177static int dp_display_bind(struct device *dev, struct device *master,
178 void *data)
179{
180 int rc = 0;
181 struct dp_display_private *dp;
182 struct drm_device *drm;
183 struct msm_drm_private *priv;
c943b494
CU		 184
185 drm = dev_get_drvdata(master);
186
061eb621
AK		 187 dp = container_of(g_dp_display,
188 struct dp_display_private, dp_display);
c943b494
CU		 189 if (!dp) {
190 DRM_ERROR("DP driver bind failed. Invalid driver data\n");
191 return -EINVAL;
192 }
193
194 dp->dp_display.drm_dev = drm;
195 priv = drm->dev_private;
196 priv->dp = &(dp->dp_display);
197
198 rc = dp->parser->parse(dp->parser);
199 if (rc) {
200 DRM_ERROR("device tree parsing failed\n");
201 goto end;
202 }
203
204 rc = dp_aux_register(dp->aux);
205 if (rc) {
206 DRM_ERROR("DRM DP AUX register failed\n");
207 goto end;
208 }
209
210 rc = dp_power_client_init(dp->power);
211 if (rc) {
212 DRM_ERROR("Power client create failed\n");
213 goto end;
214 }
c943b494
CU		 215end:
216 return rc;
217}
218
219static void dp_display_unbind(struct device *dev, struct device *master,
220 void *data)
221{
222 struct dp_display_private *dp;
c943b494
CU		 223 struct drm_device *drm = dev_get_drvdata(master);
224 struct msm_drm_private *priv = drm->dev_private;
225
061eb621
AK		 226 dp = container_of(g_dp_display,
227 struct dp_display_private, dp_display);
c943b494
CU		 228 if (!dp) {
229 DRM_ERROR("Invalid DP driver data\n");
230 return;
231 }
232
233 dp_power_client_deinit(dp->power);
234 dp_aux_unregister(dp->aux);
235 priv->dp = NULL;
236}
237
238static const struct component_ops dp_display_comp_ops = {
239 .bind = dp_display_bind,
240 .unbind = dp_display_unbind,
241};
242
243static bool dp_display_is_ds_bridge(struct dp_panel *panel)
244{
245 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
246 DP_DWN_STRM_PORT_PRESENT);
247}
248
249static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
250{
251 return dp_display_is_ds_bridge(dp->panel) &&
252 (dp->link->sink_count == 0);
253}
254
255static void dp_display_send_hpd_event(struct msm_dp *dp_display)
256{
257 struct dp_display_private *dp;
258 struct drm_connector *connector;
259
260 dp = container_of(dp_display, struct dp_display_private, dp_display);
261
262 connector = dp->dp_display.connector;
263 drm_helper_hpd_irq_event(connector->dev);
264}
265
266static int dp_display_send_hpd_notification(struct dp_display_private *dp,
267 bool hpd)
268{
269 static bool encoder_mode_set;
270 struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private;
271 struct msm_kms *kms = priv->kms;
272
c943b494
CU		 273 if ((hpd && dp->dp_display.is_connected) ||
274 (!hpd && !dp->dp_display.is_connected)) {
275 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
c943b494
CU		 276 return 0;
277 }
278
279 /* reset video pattern flag on disconnect */
280 if (!hpd)
281 dp->panel->video_test = false;
282
283 dp->dp_display.is_connected = hpd;
c943b494
CU		 284
285 if (dp->dp_display.is_connected && dp->dp_display.encoder
286 && !encoder_mode_set
287 && kms->funcs->set_encoder_mode) {
288 kms->funcs->set_encoder_mode(kms,
289 dp->dp_display.encoder, false);
290 DRM_DEBUG_DP("set_encoder_mode() Completed\n");
291 encoder_mode_set = true;
292 }
293
294 dp_display_send_hpd_event(&dp->dp_display);
295
c943b494
CU		 296 return 0;
297}
298
299static int dp_display_process_hpd_high(struct dp_display_private *dp)
300{
301 int rc = 0;
302 struct edid *edid;
303
c943b494
CU		 304 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
305
306 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
307 if (rc)
8ede2ecc 308 goto end;
c943b494
CU		 309
310 dp_link_process_request(dp->link);
311
c943b494
CU		 312 edid = dp->panel->edid;
313
314 dp->audio_supported = drm_detect_monitor_audio(edid);
c943b494
CU		 315 dp_panel_handle_sink_request(dp->panel);
316
317 dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
318 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
8ede2ecc
KH		 319
320 rc = dp_ctrl_on_link(dp->ctrl);
321 if (rc) {
322 DRM_ERROR("failed to complete DP link training\n");
323 goto end;
324 }
325
326 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
327
c943b494
CU		 328
329end:
330 return rc;
331}
332
333static void dp_display_host_init(struct dp_display_private *dp)
334{
335 bool flip = false;
336
337 if (dp->core_initialized) {
338 DRM_DEBUG_DP("DP core already initialized\n");
339 return;
340 }
341
342 if (dp->usbpd->orientation == ORIENTATION_CC2)
343 flip = true;
344
345 dp_power_init(dp->power, flip);
346 dp_ctrl_host_init(dp->ctrl, flip);
347 dp_aux_init(dp->aux);
348 dp->core_initialized = true;
349}
350
c943b494
CU		 351static int dp_display_usbpd_configure_cb(struct device *dev)
352{
353 int rc = 0;
354 struct dp_display_private *dp;
355
356 if (!dev) {
357 DRM_ERROR("invalid dev\n");
358 rc = -EINVAL;
359 goto end;
360 }
361
061eb621
AK		 362 dp = container_of(g_dp_display,
363 struct dp_display_private, dp_display);
c943b494
CU		 364 if (!dp) {
365 DRM_ERROR("no driver data found\n");
366 rc = -ENODEV;
367 goto end;
368 }
369
370 dp_display_host_init(dp);
371
8ede2ecc
KH		 372 /*
373 * set sink to normal operation mode -- D0
374 * before dpcd read
375 */
376 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
377 rc = dp_display_process_hpd_high(dp);
c943b494
CU		 378end:
379 return rc;
380}
381
c943b494
CU		 382static int dp_display_usbpd_disconnect_cb(struct device *dev)
383{
384 int rc = 0;
385 struct dp_display_private *dp;
386
061eb621
AK		 387 dp = container_of(g_dp_display,
388 struct dp_display_private, dp_display);
c943b494 389
8ede2ecc 390 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
c943b494 391
c943b494
CU		 392 return rc;
393}
394
395static void dp_display_handle_video_request(struct dp_display_private *dp)
396{
397 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
398 /* force disconnect followed by connect */
399 dp->usbpd->connect(dp->usbpd, false);
400 dp->panel->video_test = true;
401 dp->usbpd->connect(dp->usbpd, true);
402 dp_link_send_test_response(dp->link);
403 }
404}
405
8ede2ecc 406static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
c943b494 407{
8ede2ecc
KH		 408 u32 sink_request;
409
410 sink_request = dp->link->sink_request;
c943b494 411
8ede2ecc
KH		 412 if (sink_request & DS_PORT_STATUS_CHANGED) {
413 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
c943b494
CU		 414 if (dp_display_is_sink_count_zero(dp)) {
415 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
416 return 0;
417 }
418
419 return dp_display_process_hpd_high(dp);
420 }
421
422 dp_ctrl_handle_sink_request(dp->ctrl);
423
8ede2ecc
KH		 424 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN)
425 dp_display_handle_video_request(dp);
c943b494
CU		 426
427 return 0;
428}
429
430static int dp_display_usbpd_attention_cb(struct device *dev)
431{
432 int rc = 0;
433 struct dp_display_private *dp;
434
435 if (!dev) {
436 DRM_ERROR("invalid dev\n");
437 return -EINVAL;
438 }
439
061eb621
AK		 440 dp = container_of(g_dp_display,
441 struct dp_display_private, dp_display);
c943b494
CU		 442 if (!dp) {
443 DRM_ERROR("no driver data found\n");
444 return -ENODEV;
445 }
446
8ede2ecc
KH		 447 /* check for any test request issued by sink */
448 rc = dp_link_process_request(dp->link);
449 if (!rc)
450 dp_display_handle_irq_hpd(dp);
c943b494 451
8ede2ecc
KH		 452 return rc;
453}
c943b494 454
8ede2ecc
KH		 455static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
456{
457 struct dp_usbpd *hpd = dp->usbpd;
458 u32 state;
459 u32 tout = DP_TIMEOUT_5_SECOND;
460 int ret;
461
462 if (!hpd)
463 return 0;
464
465 mutex_lock(&dp->event_mutex);
466
467 state = atomic_read(&dp->hpd_state);
468 if (state == ST_SUSPEND_PENDING) {
469 mutex_unlock(&dp->event_mutex);
470 return 0;
c943b494
CU		 471 }
472
8ede2ecc
KH		 473 if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
474 mutex_unlock(&dp->event_mutex);
475 return 0;
c943b494
CU		 476 }
477
8ede2ecc
KH		 478 if (state == ST_DISCONNECT_PENDING) {
479 /* wait until ST_DISCONNECTED */
480 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
481 mutex_unlock(&dp->event_mutex);
482 return 0;
483 }
484
485 if (state == ST_SUSPENDED)
486 tout = DP_TIMEOUT_NONE;
487
488 atomic_set(&dp->hpd_state, ST_CONNECT_PENDING);
489
490 hpd->hpd_high = 1;
491
492 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
493 if (ret) { /* failed */
494 hpd->hpd_high = 0;
495 atomic_set(&dp->hpd_state, ST_DISCONNECTED);
496 }
497
498 /* start sanity checking */
499 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
500
501 mutex_unlock(&dp->event_mutex);
502
503 /* uevent will complete connection part */
504 return 0;
505};
506
507static int dp_display_enable(struct dp_display_private *dp, u32 data);
508static int dp_display_disable(struct dp_display_private *dp, u32 data);
509
510static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
511{
512 u32 state;
513
514 mutex_lock(&dp->event_mutex);
515
516 state = atomic_read(&dp->hpd_state);
517 if (state == ST_CONNECT_PENDING) {
518 dp_display_enable(dp, 0);
519 atomic_set(&dp->hpd_state, ST_CONNECTED);
520 }
521
522 mutex_unlock(&dp->event_mutex);
523
524 return 0;
525}
526
527static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
528{
529 struct dp_usbpd *hpd = dp->usbpd;
530 u32 state;
531
532 if (!hpd)
533 return 0;
534
535 mutex_lock(&dp->event_mutex);
536
537 state = atomic_read(&dp->hpd_state);
538 if (state == ST_SUSPEND_PENDING) {
539 mutex_unlock(&dp->event_mutex);
540 return 0;
541 }
542
543 if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) {
544 mutex_unlock(&dp->event_mutex);
545 return 0;
546 }
547
548 if (state == ST_CONNECT_PENDING) {
549 /* wait until CONNECTED */
550 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
551 mutex_unlock(&dp->event_mutex);
552 return 0;
553 }
554
555 atomic_set(&dp->hpd_state, ST_DISCONNECT_PENDING);
556
557 /* disable HPD plug interrupt until disconnect is done */
558 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK
559 | DP_DP_IRQ_HPD_INT_MASK, false);
560
561 hpd->hpd_high = 0;
562
563 /*
564 * We don't need separate work for disconnect as
565 * connect/attention interrupts are disabled
566 */
567 dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
568
569 /* start sanity checking */
570 dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
571
572 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK |
573 DP_DP_IRQ_HPD_INT_MASK, true);
574
575 /* uevent will complete disconnection part */
576 mutex_unlock(&dp->event_mutex);
577 return 0;
578}
579
580static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
581{
582 u32 state;
583
584 mutex_lock(&dp->event_mutex);
585
586 state = atomic_read(&dp->hpd_state);
587 if (state == ST_DISCONNECT_PENDING) {
588 dp_display_disable(dp, 0);
589 atomic_set(&dp->hpd_state, ST_DISCONNECTED);
590 }
591
592 mutex_unlock(&dp->event_mutex);
593
594 return 0;
595}
596
597static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
598{
599 u32 state;
600
601 mutex_lock(&dp->event_mutex);
602
603 /* irq_hpd can happen at either connected or disconnected state */
604 state = atomic_read(&dp->hpd_state);
605 if (state == ST_SUSPEND_PENDING) {
606 mutex_unlock(&dp->event_mutex);
607 return 0;
608 }
609
610 dp_display_usbpd_attention_cb(&dp->pdev->dev);
611
612 mutex_unlock(&dp->event_mutex);
613
614 return 0;
c943b494
CU		 615}
616
617static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
618{
619 dp_ctrl_put(dp->ctrl);
620 dp_panel_put(dp->panel);
621 dp_aux_put(dp->aux);
14975cff 622 dp_pll_put(dp->pll);
c943b494
CU		 623}
624
625static int dp_init_sub_modules(struct dp_display_private *dp)
626{
627 int rc = 0;
628 struct device *dev = &dp->pdev->dev;
629 struct dp_usbpd_cb *cb = &dp->usbpd_cb;
630 struct dp_panel_in panel_in = {
631 .dev = dev,
632 };
14975cff
CU		 633 struct dp_pll_in pll_in = {
634 .pdev = dp->pdev,
635 };
c943b494
CU		 636
637 /* Callback APIs used for cable status change event */
638 cb->configure = dp_display_usbpd_configure_cb;
639 cb->disconnect = dp_display_usbpd_disconnect_cb;
640 cb->attention = dp_display_usbpd_attention_cb;
641
642 dp->usbpd = dp_hpd_get(dev, cb);
643 if (IS_ERR(dp->usbpd)) {
644 rc = PTR_ERR(dp->usbpd);
645 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
646 dp->usbpd = NULL;
647 goto error;
648 }
649
650 dp->parser = dp_parser_get(dp->pdev);
651 if (IS_ERR(dp->parser)) {
652 rc = PTR_ERR(dp->parser);
653 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
654 dp->parser = NULL;
655 goto error;
656 }
657
658 dp->catalog = dp_catalog_get(dev, &dp->parser->io);
659 if (IS_ERR(dp->catalog)) {
660 rc = PTR_ERR(dp->catalog);
661 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
662 dp->catalog = NULL;
663 goto error;
664 }
665
14975cff
CU		 666 pll_in.parser = dp->parser;
667 dp->pll = dp_pll_get(&pll_in);
668 if (IS_ERR_OR_NULL(dp->pll)) {
669 rc = -EINVAL;
670 DRM_ERROR("failed to initialize pll, rc = %d\n", rc);
671 dp->pll = NULL;
672 goto error;
673 }
674
675 dp->parser->pll = dp->pll;
676
c943b494
CU		 677 dp->power = dp_power_get(dp->parser);
678 if (IS_ERR(dp->power)) {
679 rc = PTR_ERR(dp->power);
680 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
681 dp->power = NULL;
682 goto error;
683 }
684
685 dp->aux = dp_aux_get(dev, dp->catalog);
686 if (IS_ERR(dp->aux)) {
687 rc = PTR_ERR(dp->aux);
688 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
689 dp->aux = NULL;
690 goto error;
691 }
692
693 dp->link = dp_link_get(dev, dp->aux);
694 if (IS_ERR(dp->link)) {
695 rc = PTR_ERR(dp->link);
696 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
697 dp->link = NULL;
698 goto error_link;
699 }
700
701 panel_in.aux = dp->aux;
702 panel_in.catalog = dp->catalog;
703 panel_in.link = dp->link;
704
705 dp->panel = dp_panel_get(&panel_in);
706 if (IS_ERR(dp->panel)) {
707 rc = PTR_ERR(dp->panel);
708 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
709 dp->panel = NULL;
710 goto error_link;
711 }
712
713 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
714 dp->power, dp->catalog, dp->parser);
715 if (IS_ERR(dp->ctrl)) {
716 rc = PTR_ERR(dp->ctrl);
717 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
718 dp->ctrl = NULL;
719 goto error_ctrl;
720 }
721
722 return rc;
723error_ctrl:
724 dp_panel_put(dp->panel);
725error_link:
726 dp_aux_put(dp->aux);
727error:
728 return rc;
729}
730
731static int dp_display_set_mode(struct msm_dp *dp_display,
732 struct dp_display_mode *mode)
733{
734 struct dp_display_private *dp;
735
736 dp = container_of(dp_display, struct dp_display_private, dp_display);
737
738 dp->panel->dp_mode.drm_mode = mode->drm_mode;
739 dp->panel->dp_mode.bpp = mode->bpp;
740 dp->panel->dp_mode.capabilities = mode->capabilities;
741 dp_panel_init_panel_info(dp->panel);
742 return 0;
743}
744
745static int dp_display_prepare(struct msm_dp *dp)
746{
747 return 0;
748}
749
8ede2ecc 750static int dp_display_enable(struct dp_display_private *dp, u32 data)
c943b494
CU		 751{
752 int rc = 0;
c943b494
CU		 753
754 if (dp->power_on) {
755 DRM_DEBUG_DP("Link already setup, return\n");
756 return 0;
757 }
758
8ede2ecc 759 rc = dp_ctrl_on_stream(dp->ctrl);
c943b494
CU		 760 if (!rc)
761 dp->power_on = true;
762
8ede2ecc
KH		 763 /* complete resume_comp regardless it is armed or not */
764 complete(&dp->resume_comp);
c943b494
CU		 765 return rc;
766}
767
768static int dp_display_post_enable(struct msm_dp *dp_display)
769{
c943b494
CU		 770 return 0;
771}
772
8ede2ecc 773static int dp_display_disable(struct dp_display_private *dp, u32 data)
c943b494 774{
8ede2ecc 775 if (!dp->power_on)
c943b494
CU		 776 return -EINVAL;
777
778 dp_ctrl_off(dp->ctrl);
779
8ede2ecc 780 dp->core_initialized = false;
c943b494 781
8ede2ecc 782 dp->power_on = false;
c943b494
CU		 783
784 return 0;
785}
786
787static int dp_display_unprepare(struct msm_dp *dp)
788{
789 return 0;
790}
791
792int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
793{
794 const u32 num_components = 3, default_bpp = 24;
795 struct dp_display_private *dp_display;
796 struct dp_link_info *link_info;
797 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
798
799 if (!dp || !mode_pclk_khz || !dp->connector) {
800 DRM_ERROR("invalid params\n");
801 return -EINVAL;
802 }
803
804 dp_display = container_of(dp, struct dp_display_private, dp_display);
805 link_info = &dp_display->panel->link_info;
806
807 mode_bpp = dp->connector->display_info.bpc * num_components;
808 if (!mode_bpp)
809 mode_bpp = default_bpp;
810
811 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
812 mode_bpp, mode_pclk_khz);
813
814 mode_rate_khz = mode_pclk_khz * mode_bpp;
815 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
816
817 if (mode_rate_khz > supported_rate_khz)
818 return MODE_BAD;
819
820 return MODE_OK;
821}
822
823int dp_display_get_modes(struct msm_dp *dp,
824 struct dp_display_mode *dp_mode)
825{
826 struct dp_display_private *dp_display;
827 int ret = 0;
828
829 if (!dp) {
830 DRM_ERROR("invalid params\n");
831 return 0;
832 }
833
834 dp_display = container_of(dp, struct dp_display_private, dp_display);
835
836 ret = dp_panel_get_modes(dp_display->panel,
837 dp->connector, dp_mode);
838 if (dp_mode->drm_mode.clock)
839 dp->max_pclk_khz = dp_mode->drm_mode.clock;
840 return ret;
841}
842
843bool dp_display_check_video_test(struct msm_dp *dp)
844{
845 struct dp_display_private *dp_display;
846
847 dp_display = container_of(dp, struct dp_display_private, dp_display);
848
849 return dp_display->panel->video_test;
850}
851
852int dp_display_get_test_bpp(struct msm_dp *dp)
853{
854 struct dp_display_private *dp_display;
855
856 if (!dp) {
857 DRM_ERROR("invalid params\n");
858 return 0;
859 }
860
861 dp_display = container_of(dp, struct dp_display_private, dp_display);
862
863 return dp_link_bit_depth_to_bpp(
864 dp_display->link->test_video.test_bit_depth);
865}
866
8ede2ecc
KH		 867static void dp_display_config_hpd(struct dp_display_private *dp)
868{
869
870 dp_display_host_init(dp);
871 dp_catalog_ctrl_hpd_config(dp->catalog);
872
873 /* Enable interrupt first time
874 * we are leaving dp clocks on during disconnect
875 * and never disable interrupt
876 */
877 enable_irq(dp->irq);
878}
879
880static int hpd_event_thread(void *data)
881{
882 struct dp_display_private *dp_priv;
883 unsigned long flag;
884 struct dp_event *todo;
885 int timeout_mode = 0;
886
887 dp_priv = (struct dp_display_private *)data;
888
889 while (1) {
890 if (timeout_mode) {
891 wait_event_timeout(dp_priv->event_q,
892 (dp_priv->event_pndx == dp_priv->event_gndx),
893 EVENT_TIMEOUT);
894 } else {
895 wait_event_timeout(dp_priv->event_q,
896 (dp_priv->event_pndx != dp_priv->event_gndx),
897 EVENT_TIMEOUT);
898 }
899 spin_lock_irqsave(&dp_priv->event_lock, flag);
900 todo = &dp_priv->event_list[dp_priv->event_gndx];
901 if (todo->delay) {
902 struct dp_event *todo_next;
903
904 dp_priv->event_gndx++;
905 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
906
907 /* re enter delay event into q */
908 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
909 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
910 todo_next->event_id = todo->event_id;
911 todo_next->data = todo->data;
912 todo_next->delay = todo->delay - 1;
913
914 /* clean up older event */
915 todo->event_id = EV_NO_EVENT;
916 todo->delay = 0;
917
918 /* switch to timeout mode */
919 timeout_mode = 1;
920 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
921 continue;
922 }
923
924 /* timeout with no events in q */
925 if (dp_priv->event_pndx == dp_priv->event_gndx) {
926 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
927 continue;
928 }
929
930 dp_priv->event_gndx++;
931 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
932 timeout_mode = 0;
933 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
934
935 switch (todo->event_id) {
936 case EV_HPD_INIT_SETUP:
937 dp_display_config_hpd(dp_priv);
938 break;
939 case EV_HPD_PLUG_INT:
940 dp_hpd_plug_handle(dp_priv, todo->data);
941 break;
942 case EV_HPD_UNPLUG_INT:
943 dp_hpd_unplug_handle(dp_priv, todo->data);
944 break;
945 case EV_IRQ_HPD_INT:
946 dp_irq_hpd_handle(dp_priv, todo->data);
947 break;
948 case EV_HPD_REPLUG_INT:
949 /* do nothing */
950 break;
951 case EV_USER_NOTIFICATION:
952 dp_display_send_hpd_notification(dp_priv,
953 todo->data);
954 break;
955 case EV_CONNECT_PENDING_TIMEOUT:
956 dp_connect_pending_timeout(dp_priv,
957 todo->data);
958 break;
959 case EV_DISCONNECT_PENDING_TIMEOUT:
960 dp_disconnect_pending_timeout(dp_priv,
961 todo->data);
962 break;
963 default:
964 break;
965 }
966 }
967
968 return 0;
969}
970
971static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
972{
973 init_waitqueue_head(&dp_priv->event_q);
974 spin_lock_init(&dp_priv->event_lock);
975
976 kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
977}
978
979static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
980{
981 struct dp_display_private *dp = dev_id;
982 irqreturn_t ret = IRQ_HANDLED;
983 u32 hpd_isr_status;
984
985 if (!dp) {
986 DRM_ERROR("invalid data\n");
987 return IRQ_NONE;
988 }
989
990 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
991
992 if (hpd_isr_status & 0x0F) {
993 /* hpd related interrupts */
994 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
995 hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
996 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
997 }
998
999 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1000 /* delete connect pending event first */
1001 dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1002 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1003 }
1004
1005 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1006 dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1007
1008 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1009 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1010 }
1011
1012 /* DP controller isr */
1013 dp_ctrl_isr(dp->ctrl);
1014
1015 /* DP aux isr */
1016 dp_aux_isr(dp->aux);
1017
1018 return ret;
1019}
1020
1021int dp_display_request_irq(struct msm_dp *dp_display)
1022{
1023 int rc = 0;
1024 struct dp_display_private *dp;
1025
1026 if (!dp_display) {
1027 DRM_ERROR("invalid input\n");
1028 return -EINVAL;
1029 }
1030
1031 dp = container_of(dp_display, struct dp_display_private, dp_display);
1032
1033 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1034 if (dp->irq < 0) {
1035 rc = dp->irq;
1036 DRM_ERROR("failed to get irq: %d\n", rc);
1037 return rc;
1038 }
1039
1040 rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1041 dp_display_irq_handler,
1042 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1043 if (rc < 0) {
1044 DRM_ERROR("failed to request IRQ%u: %d\n",
1045 dp->irq, rc);
1046 return rc;
1047 }
1048 disable_irq(dp->irq);
1049
1050 return 0;
1051}
1052
c943b494
CU		 1053static int dp_display_probe(struct platform_device *pdev)
1054{
1055 int rc = 0;
1056 struct dp_display_private *dp;
1057
1058 if (!pdev || !pdev->dev.of_node) {
1059 DRM_ERROR("pdev not found\n");
1060 return -ENODEV;
1061 }
1062
1063 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1064 if (!dp)
1065 return -ENOMEM;
1066
c943b494
CU		 1067 dp->pdev = pdev;
1068 dp->name = "drm_dp";
1069
1070 rc = dp_init_sub_modules(dp);
1071 if (rc) {
1072 DRM_ERROR("init sub module failed\n");
1073 return -EPROBE_DEFER;
1074 }
1075
8ede2ecc 1076 mutex_init(&dp->event_mutex);
061eb621 1077
8ede2ecc 1078 init_completion(&dp->resume_comp);
061eb621 1079
c943b494
CU		 1080 g_dp_display = &dp->dp_display;
1081
061eb621
AK		 1082 platform_set_drvdata(pdev, g_dp_display);
1083
c943b494
CU		 1084 rc = component_add(&pdev->dev, &dp_display_comp_ops);
1085 if (rc) {
1086 DRM_ERROR("component add failed, rc=%d\n", rc);
1087 dp_display_deinit_sub_modules(dp);
1088 }
1089
1090 return rc;
1091}
1092
1093static int dp_display_remove(struct platform_device *pdev)
1094{
1095 struct dp_display_private *dp;
1096
061eb621
AK		 1097 dp = container_of(g_dp_display,
1098 struct dp_display_private, dp_display);
c943b494
CU		 1099
1100 dp_display_deinit_sub_modules(dp);
1101
1102 component_del(&pdev->dev, &dp_display_comp_ops);
1103 platform_set_drvdata(pdev, NULL);
1104
1105 return 0;
1106}
1107
1108static int dp_pm_resume(struct device *dev)
1109{
1110 return 0;
1111}
1112
1113static int dp_pm_suspend(struct device *dev)
1114{
8ede2ecc
KH		 1115 struct platform_device *pdev = to_platform_device(dev);
1116 struct dp_display_private *dp = platform_get_drvdata(pdev);
1117
1118 if (!dp) {
1119 DRM_ERROR("DP driver bind failed. Invalid driver data\n");
1120 return -EINVAL;
1121 }
1122
1123 atomic_set(&dp->hpd_state, ST_SUSPENDED);
1124
c943b494
CU		 1125 return 0;
1126}
1127
1128static int dp_pm_prepare(struct device *dev)
1129{
1130 return 0;
1131}
1132
1133static void dp_pm_complete(struct device *dev)
1134{
1135
1136}
1137
1138static const struct dev_pm_ops dp_pm_ops = {
1139 .suspend = dp_pm_suspend,
1140 .resume = dp_pm_resume,
1141 .prepare = dp_pm_prepare,
1142 .complete = dp_pm_complete,
1143};
1144
1145static struct platform_driver dp_display_driver = {
1146 .probe = dp_display_probe,
1147 .remove = dp_display_remove,
1148 .driver = {
1149 .name = "msm-dp-display",
1150 .of_match_table = dp_dt_match,
1151 .suppress_bind_attrs = true,
1152 .pm = &dp_pm_ops,
1153 },
1154};
1155
1156int __init msm_dp_register(void)
1157{
1158 int ret;
1159
1160 ret = platform_driver_register(&dp_display_driver);
1161 if (ret)
1162 DRM_ERROR("Dp display driver register failed");
1163
1164 return ret;
1165}
1166
1167void __exit msm_dp_unregister(void)
1168{
1169 platform_driver_unregister(&dp_display_driver);
1170}
1171
220b856a
TS		 1172void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1173{
1174 struct dp_display_private *dp;
1175
1176 if (!dp_display)
1177 return;
1178
1179 dp = container_of(dp_display, struct dp_display_private, dp_display);
1180
8ede2ecc
KH		 1181 dp_hpd_event_setup(dp);
1182
1183 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
220b856a
TS		 1184}
1185
c943b494
CU		 1186int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1187 struct drm_encoder *encoder)
1188{
1189 struct msm_drm_private *priv;
1190 int ret;
1191
1192 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1193 return -EINVAL;
1194
1195 priv = dev->dev_private;
1196 dp_display->drm_dev = dev;
1197
1198 ret = dp_display_request_irq(dp_display);
1199 if (ret) {
1200 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1201 return ret;
1202 }
1203
1204 dp_display->encoder = encoder;
1205
1206 dp_display->connector = dp_drm_connector_init(dp_display);
1207 if (IS_ERR(dp_display->connector)) {
1208 ret = PTR_ERR(dp_display->connector);
1209 DRM_DEV_ERROR(dev->dev,
1210 "failed to create dp connector: %d\n", ret);
1211 dp_display->connector = NULL;
1212 return ret;
1213 }
1214
1215 priv->connectors[priv->num_connectors++] = dp_display->connector;
1216 return 0;
1217}
1218
8ede2ecc
KH		 1219static int dp_display_wait4resume_done(struct dp_display_private *dp)
1220{
1221 int ret = 0;
1222
1223 reinit_completion(&dp->resume_comp);
1224 if (!wait_for_completion_timeout(&dp->resume_comp,
1225 WAIT_FOR_RESUME_TIMEOUT_JIFFIES)) {
1226 DRM_ERROR("wait4resume_done timedout\n");
1227 ret = -ETIMEDOUT;
1228 }
1229 return ret;
1230}
1231
c943b494
CU		 1232int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1233{
1234 int rc = 0;
1235 struct dp_display_private *dp_display;
8ede2ecc 1236 u32 state;
c943b494
CU		 1237
1238 dp_display = container_of(dp, struct dp_display_private, dp_display);
1239 if (!dp_display->dp_mode.drm_mode.clock) {
1240 DRM_ERROR("invalid params\n");
1241 return -EINVAL;
1242 }
1243
8ede2ecc
KH		 1244 mutex_lock(&dp_display->event_mutex);
1245
c943b494
CU		 1246 rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1247 if (rc) {
1248 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
8ede2ecc 1249 mutex_unlock(&dp_display->event_mutex);
c943b494
CU		 1250 return rc;
1251 }
1252
1253 rc = dp_display_prepare(dp);
1254 if (rc) {
1255 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
8ede2ecc 1256 mutex_unlock(&dp_display->event_mutex);
c943b494
CU		 1257 return rc;
1258 }
1259
8ede2ecc
KH		 1260 state = atomic_read(&dp_display->hpd_state);
1261 if (state == ST_SUSPENDED) {
1262 /* start link training */
1263 dp_add_event(dp_display, EV_HPD_PLUG_INT, 0, 0);
1264 mutex_unlock(&dp_display->event_mutex);
1265
1266 /* wait until dp interface is up */
1267 goto resume_done;
c943b494
CU		 1268 }
1269
8ede2ecc
KH		 1270 dp_display_enable(dp_display, 0);
1271
c943b494
CU		 1272 rc = dp_display_post_enable(dp);
1273 if (rc) {
1274 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
8ede2ecc 1275 dp_display_disable(dp_display, 0);
c943b494
CU		 1276 dp_display_unprepare(dp);
1277 }
8ede2ecc
KH		 1278
1279 dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1280
1281 if (state == ST_SUSPEND_PENDING)
1282 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1283
1284 /* completed connection */
1285 atomic_set(&dp_display->hpd_state, ST_CONNECTED);
1286
1287 mutex_unlock(&dp_display->event_mutex);
1288
c943b494 1289 return rc;
8ede2ecc
KH		 1290
1291resume_done:
1292 dp_display_wait4resume_done(dp_display);
1293 return rc;
1294}
1295
1296int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1297{
1298 struct dp_display_private *dp_display;
1299
1300 dp_display = container_of(dp, struct dp_display_private, dp_display);
1301
1302 dp_ctrl_push_idle(dp_display->ctrl);
1303
1304 return 0;
c943b494
CU		 1305}
1306
1307int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1308{
1309 int rc = 0;
8ede2ecc
KH		 1310 u32 state;
1311 struct dp_display_private *dp_display;
c943b494 1312
8ede2ecc 1313 dp_display = container_of(dp, struct dp_display_private, dp_display);
c943b494 1314
8ede2ecc
KH		 1315 mutex_lock(&dp_display->event_mutex);
1316
1317 dp_display_disable(dp_display, 0);
c943b494
CU		 1318
1319 rc = dp_display_unprepare(dp);
1320 if (rc)
1321 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1322
8ede2ecc
KH		 1323 dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1324
1325 state = atomic_read(&dp_display->hpd_state);
1326 if (state == ST_DISCONNECT_PENDING) {
1327 /* completed disconnection */
1328 atomic_set(&dp_display->hpd_state, ST_DISCONNECTED);
1329 } else {
1330 atomic_set(&dp_display->hpd_state, ST_SUSPEND_PENDING);
1331 }
1332
1333 mutex_unlock(&dp_display->event_mutex);
c943b494
CU		 1334 return rc;
1335}
1336
1337void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1338 struct drm_display_mode *mode,
1339 struct drm_display_mode *adjusted_mode)
1340{
1341 struct dp_display_private *dp_display;
1342
1343 dp_display = container_of(dp, struct dp_display_private, dp_display);
1344
1345 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1346
1347 if (dp_display_check_video_test(dp))
1348 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1349 else /* Default num_components per pixel = 3 */
1350 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1351
1352 if (!dp_display->dp_mode.bpp)
1353 dp_display->dp_mode.bpp = 24; /* Default bpp */
1354
1355 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1356
1357 dp_display->dp_mode.v_active_low =
1358 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1359
1360 dp_display->dp_mode.h_active_low =
1361 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1362}
Linux 6.x block layer and io_uring tree(s)