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drm/msm/dp: reset aux controller after dp_aux_cmd_fifo_tx() failed.
[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"
d13e36d7 27#include "dp_audio.h"
d11a9369 28#include "dp_debug.h"
c943b494
CU		 29
30static struct msm_dp *g_dp_display;
31#define HPD_STRING_SIZE 30
32
8ede2ecc
KH		 33enum {
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 */
43enum {
44 ST_DISCONNECTED,
45 ST_CONNECT_PENDING,
46 ST_CONNECTED,
47 ST_DISCONNECT_PENDING,
62671d2e 48 ST_DISPLAY_OFF,
8ede2ecc
KH		 49 ST_SUSPENDED,
50};
51
52enum {
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
73struct dp_event {
74 u32 event_id;
75 u32 data;
76 u32 delay;
77};
78
c943b494
CU		 79struct dp_display_private {
80 char *name;
81 int irq;
82
83 /* state variables */
84 bool core_initialized;
c943b494
CU		 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;
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;
8ede2ecc 99 struct dp_debug *debug;
c943b494
CU		 100
101 struct dp_usbpd_cb usbpd_cb;
102 struct dp_display_mode dp_mode;
103 struct msm_dp dp_display;
220b856a 104
158b9aa7
AK		 105 /* wait for audio signaling */
106 struct completion audio_comp;
107
8ede2ecc
KH		 108 /* event related only access by event thread */
109 struct mutex event_mutex;
110 wait_queue_head_t event_q;
19e52bcb 111 u32 hpd_state;
8ede2ecc
KH		 112 u32 event_pndx;
113 u32 event_gndx;
114 struct dp_event event_list[DP_EVENT_Q_MAX];
115 spinlock_t event_lock;
116
d13e36d7 117 struct dp_audio *audio;
c943b494
CU		 118};
119
120static const struct of_device_id dp_dt_match[] = {
121 {.compatible = "qcom,sc7180-dp"},
122 {}
123};
124
8ede2ecc
KH		 125static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
126 u32 data, u32 delay)
c943b494 127{
8ede2ecc
KH		 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;
220b856a 140 }
8ede2ecc
KH		 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);
c943b494 148
8ede2ecc 149 return 0;
220b856a
TS		 150}
151
8ede2ecc 152static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
220b856a 153{
8ede2ecc
KH		 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 }
220b856a 163
8ede2ecc
KH		 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;
220b856a 173 }
8ede2ecc 174 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
220b856a 175
8ede2ecc 176 return 0;
c943b494
CU		 177}
178
f2f46b87
KH		 179void 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
158b9aa7
AK		 188void 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
c943b494
CU		 197static 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;
c943b494
CU		 204
205 drm = dev_get_drvdata(master);
206
061eb621
AK		 207 dp = container_of(g_dp_display,
208 struct dp_display_private, dp_display);
c943b494
CU		 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 }
d13e36d7
AK		 231
232 rc = dp_register_audio_driver(dev, dp->audio);
f913454a 233 if (rc)
d13e36d7 234 DRM_ERROR("Audio registration Dp failed\n");
d13e36d7 235
c943b494
CU		 236end:
237 return rc;
238}
239
240static void dp_display_unbind(struct device *dev, struct device *master,
241 void *data)
242{
243 struct dp_display_private *dp;
c943b494
CU		 244 struct drm_device *drm = dev_get_drvdata(master);
245 struct msm_drm_private *priv = drm->dev_private;
246
061eb621
AK		 247 dp = container_of(g_dp_display,
248 struct dp_display_private, dp_display);
c943b494
CU		 249
250 dp_power_client_deinit(dp->power);
251 dp_aux_unregister(dp->aux);
252 priv->dp = NULL;
253}
254
255static const struct component_ops dp_display_comp_ops = {
256 .bind = dp_display_bind,
257 .unbind = dp_display_unbind,
258};
259
260static 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
266static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
267{
601f0479
MR		 268 DRM_DEBUG_DP("present=%#x sink_count=%d\n", dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT],
269 dp->link->sink_count);
c943b494
CU		 270 return dp_display_is_ds_bridge(dp->panel) &&
271 (dp->link->sink_count == 0);
272}
273
274static void dp_display_send_hpd_event(struct msm_dp *dp_display)
275{
276 struct dp_display_private *dp;
277 struct drm_connector *connector;
278
279 dp = container_of(dp_display, struct dp_display_private, dp_display);
280
281 connector = dp->dp_display.connector;
282 drm_helper_hpd_irq_event(connector->dev);
283}
284
c58eb1b5 285
c58eb1b5
KH		 286static int dp_display_send_hpd_notification(struct dp_display_private *dp,
287 bool hpd)
288{
c943b494
CU		 289 if ((hpd && dp->dp_display.is_connected) ||
290 (!hpd && !dp->dp_display.is_connected)) {
291 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
c943b494
CU		 292 return 0;
293 }
294
295 /* reset video pattern flag on disconnect */
296 if (!hpd)
297 dp->panel->video_test = false;
298
299 dp->dp_display.is_connected = hpd;
c943b494 300
601f0479 301 DRM_DEBUG_DP("hpd=%d\n", hpd);
c943b494
CU		 302 dp_display_send_hpd_event(&dp->dp_display);
303
c943b494
CU		 304 return 0;
305}
306
307static int dp_display_process_hpd_high(struct dp_display_private *dp)
308{
309 int rc = 0;
310 struct edid *edid;
311
c943b494
CU		 312 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
313
314 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
315 if (rc)
8ede2ecc 316 goto end;
c943b494
CU		 317
318 dp_link_process_request(dp->link);
319
c943b494
CU		 320 edid = dp->panel->edid;
321
322 dp->audio_supported = drm_detect_monitor_audio(edid);
c943b494
CU		 323 dp_panel_handle_sink_request(dp->panel);
324
325 dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
326 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
8ede2ecc 327
f21c8a27
KH		 328 /*
329 * set sink to normal operation mode -- D0
330 * before dpcd read
331 */
332 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
333
6625e263 334 dp_link_reset_phy_params_vx_px(dp->link);
8ede2ecc
KH		 335 rc = dp_ctrl_on_link(dp->ctrl);
336 if (rc) {
337 DRM_ERROR("failed to complete DP link training\n");
338 goto end;
339 }
340
341 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
342
c943b494
CU		 343end:
344 return rc;
345}
346
ea9f337c 347static void dp_display_host_init(struct dp_display_private *dp, int reset)
c943b494
CU		 348{
349 bool flip = false;
350
601f0479 351 DRM_DEBUG_DP("core_initialized=%d\n", dp->core_initialized);
c943b494
CU		 352 if (dp->core_initialized) {
353 DRM_DEBUG_DP("DP core already initialized\n");
354 return;
355 }
356
357 if (dp->usbpd->orientation == ORIENTATION_CC2)
358 flip = true;
359
360 dp_power_init(dp->power, flip);
ea9f337c 361 dp_ctrl_host_init(dp->ctrl, flip, reset);
c943b494
CU		 362 dp_aux_init(dp->aux);
363 dp->core_initialized = true;
364}
365
19e52bcb
KH		 366static void dp_display_host_deinit(struct dp_display_private *dp)
367{
368 if (!dp->core_initialized) {
369 DRM_DEBUG_DP("DP core not initialized\n");
370 return;
371 }
372
373 dp_ctrl_host_deinit(dp->ctrl);
374 dp_aux_deinit(dp->aux);
375 dp_power_deinit(dp->power);
376
377 dp->core_initialized = false;
378}
379
c943b494
CU		 380static int dp_display_usbpd_configure_cb(struct device *dev)
381{
382 int rc = 0;
383 struct dp_display_private *dp;
384
385 if (!dev) {
386 DRM_ERROR("invalid dev\n");
387 rc = -EINVAL;
388 goto end;
389 }
390
061eb621
AK		 391 dp = container_of(g_dp_display,
392 struct dp_display_private, dp_display);
c943b494 393
ea9f337c 394 dp_display_host_init(dp, false);
c943b494 395
8ede2ecc 396 rc = dp_display_process_hpd_high(dp);
c943b494
CU		 397end:
398 return rc;
399}
400
c943b494
CU		 401static int dp_display_usbpd_disconnect_cb(struct device *dev)
402{
403 int rc = 0;
404 struct dp_display_private *dp;
405
d13e36d7
AK		 406 if (!dev) {
407 DRM_ERROR("invalid dev\n");
408 rc = -EINVAL;
409 return rc;
410 }
411
061eb621
AK		 412 dp = container_of(g_dp_display,
413 struct dp_display_private, dp_display);
c943b494 414
8ede2ecc 415 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
c943b494 416
c943b494
CU		 417 return rc;
418}
419
420static void dp_display_handle_video_request(struct dp_display_private *dp)
421{
422 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
c943b494 423 dp->panel->video_test = true;
c943b494
CU		 424 dp_link_send_test_response(dp->link);
425 }
426}
427
c58eb1b5 428static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
c943b494 429{
c58eb1b5 430 int rc = 0;
c943b494 431
c58eb1b5
KH		 432 if (dp_display_is_sink_count_zero(dp)) {
433 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
434 if (dp->hpd_state != ST_DISCONNECTED) {
435 dp->hpd_state = ST_DISCONNECT_PENDING;
436 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
437 }
438 } else {
439 if (dp->hpd_state == ST_DISCONNECTED) {
440 dp->hpd_state = ST_CONNECT_PENDING;
441 rc = dp_display_process_hpd_high(dp);
442 if (rc)
443 dp->hpd_state = ST_DISCONNECTED;
c943b494 444 }
c58eb1b5
KH		 445 }
446
447 return rc;
448}
449
450static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
451{
452 u32 sink_request = dp->link->sink_request;
c943b494 453
601f0479 454 DRM_DEBUG_DP("%d\n", sink_request);
c58eb1b5
KH		 455 if (dp->hpd_state == ST_DISCONNECTED) {
456 if (sink_request & DP_LINK_STATUS_UPDATED) {
601f0479 457 DRM_DEBUG_DP("Disconnected sink_request: %d\n", sink_request);
c58eb1b5
KH		 458 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
459 return -EINVAL;
460 }
c943b494
CU		 461 }
462
463 dp_ctrl_handle_sink_request(dp->ctrl);
464
c58eb1b5 465 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
8ede2ecc 466 dp_display_handle_video_request(dp);
c943b494
CU		 467
468 return 0;
469}
470
471static int dp_display_usbpd_attention_cb(struct device *dev)
472{
473 int rc = 0;
26b8d66a 474 u32 sink_request;
c943b494
CU		 475 struct dp_display_private *dp;
476
477 if (!dev) {
478 DRM_ERROR("invalid dev\n");
479 return -EINVAL;
480 }
481
061eb621
AK		 482 dp = container_of(g_dp_display,
483 struct dp_display_private, dp_display);
c943b494 484
8ede2ecc
KH		 485 /* check for any test request issued by sink */
486 rc = dp_link_process_request(dp->link);
26b8d66a
KH		 487 if (!rc) {
488 sink_request = dp->link->sink_request;
601f0479 489 DRM_DEBUG_DP("hpd_state=%d sink_request=%d\n", dp->hpd_state, sink_request);
c58eb1b5
KH		 490 if (sink_request & DS_PORT_STATUS_CHANGED)
491 rc = dp_display_handle_port_ststus_changed(dp);
492 else
493 rc = dp_display_handle_irq_hpd(dp);
26b8d66a 494 }
c943b494 495
8ede2ecc
KH		 496 return rc;
497}
c943b494 498
8ede2ecc
KH		 499static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
500{
501 struct dp_usbpd *hpd = dp->usbpd;
502 u32 state;
503 u32 tout = DP_TIMEOUT_5_SECOND;
504 int ret;
505
506 if (!hpd)
507 return 0;
508
509 mutex_lock(&dp->event_mutex);
510
19e52bcb 511 state = dp->hpd_state;
601f0479 512 DRM_DEBUG_DP("hpd_state=%d\n", state);
62671d2e 513 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
8ede2ecc
KH		 514 mutex_unlock(&dp->event_mutex);
515 return 0;
c943b494
CU		 516 }
517
8ede2ecc
KH		 518 if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
519 mutex_unlock(&dp->event_mutex);
520 return 0;
c943b494
CU		 521 }
522
8ede2ecc
KH		 523 if (state == ST_DISCONNECT_PENDING) {
524 /* wait until ST_DISCONNECTED */
525 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
526 mutex_unlock(&dp->event_mutex);
527 return 0;
528 }
529
19e52bcb 530 dp->hpd_state = ST_CONNECT_PENDING;
8ede2ecc
KH		 531
532 hpd->hpd_high = 1;
533
534 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
62671d2e 535 if (ret) { /* link train failed */
8ede2ecc 536 hpd->hpd_high = 0;
19e52bcb 537 dp->hpd_state = ST_DISCONNECTED;
231a04fc
KH		 538
539 if (ret == -ECONNRESET) { /* cable unplugged */
540 dp->core_initialized = false;
541 }
542
62671d2e
KH		 543 } else {
544 /* start sentinel checking in case of missing uevent */
545 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
8ede2ecc
KH		 546 }
547
f21c8a27
KH		 548 /* enable HDP irq_hpd/replug interrupt */
549 dp_catalog_hpd_config_intr(dp->catalog,
550 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);
551
8ede2ecc
KH		 552 mutex_unlock(&dp->event_mutex);
553
554 /* uevent will complete connection part */
555 return 0;
556};
557
558static int dp_display_enable(struct dp_display_private *dp, u32 data);
559static int dp_display_disable(struct dp_display_private *dp, u32 data);
560
561static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
562{
563 u32 state;
564
565 mutex_lock(&dp->event_mutex);
566
19e52bcb 567 state = dp->hpd_state;
d9aa6571 568 if (state == ST_CONNECT_PENDING)
19e52bcb 569 dp->hpd_state = ST_CONNECTED;
8ede2ecc
KH		 570
571 mutex_unlock(&dp->event_mutex);
572
573 return 0;
574}
575
bf4a1b31
AK		 576static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
577 bool plugged)
578{
e8c76581
AK		 579 struct dp_display_private *dp;
580
581 dp = container_of(dp_display,
582 struct dp_display_private, dp_display);
583
584 /* notify audio subsystem only if sink supports audio */
585 if (dp_display->plugged_cb && dp_display->codec_dev &&
586 dp->audio_supported)
bf4a1b31
AK		 587 dp_display->plugged_cb(dp_display->codec_dev, plugged);
588}
589
8ede2ecc
KH		 590static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
591{
592 struct dp_usbpd *hpd = dp->usbpd;
593 u32 state;
594
595 if (!hpd)
596 return 0;
597
598 mutex_lock(&dp->event_mutex);
599
19e52bcb 600 state = dp->hpd_state;
f21c8a27
KH		 601
602 /* disable irq_hpd/replug interrupts */
603 dp_catalog_hpd_config_intr(dp->catalog,
604 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);
605
606 /* unplugged, no more irq_hpd handle */
607 dp_del_event(dp, EV_IRQ_HPD_INT);
608
609 if (state == ST_DISCONNECTED) {
610 /* triggered by irq_hdp with sink_count = 0 */
611 if (dp->link->sink_count == 0) {
612 dp_ctrl_off_phy(dp->ctrl);
613 hpd->hpd_high = 0;
614 dp->core_initialized = false;
615 }
616 mutex_unlock(&dp->event_mutex);
617 return 0;
618 }
619
620 if (state == ST_DISCONNECT_PENDING) {
8ede2ecc
KH		 621 mutex_unlock(&dp->event_mutex);
622 return 0;
623 }
624
625 if (state == ST_CONNECT_PENDING) {
626 /* wait until CONNECTED */
627 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
628 mutex_unlock(&dp->event_mutex);
629 return 0;
630 }
631
19e52bcb 632 dp->hpd_state = ST_DISCONNECT_PENDING;
8ede2ecc 633
f21c8a27
KH		 634 /* disable HPD plug interrupts */
635 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
8ede2ecc
KH		 636
637 hpd->hpd_high = 0;
638
639 /*
640 * We don't need separate work for disconnect as
641 * connect/attention interrupts are disabled
642 */
643 dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
644
62671d2e 645 /* start sentinel checking in case of missing uevent */
8ede2ecc
KH		 646 dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
647
601f0479 648 DRM_DEBUG_DP("hpd_state=%d\n", state);
bf4a1b31 649 /* signal the disconnect event early to ensure proper teardown */
c703d578 650 dp_display_handle_plugged_change(g_dp_display, false);
bf4a1b31 651
f21c8a27
KH		 652 /* enable HDP plug interrupt to prepare for next plugin */
653 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
8ede2ecc
KH		 654
655 /* uevent will complete disconnection part */
656 mutex_unlock(&dp->event_mutex);
657 return 0;
658}
659
660static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
661{
662 u32 state;
663
664 mutex_lock(&dp->event_mutex);
665
19e52bcb 666 state = dp->hpd_state;
d9aa6571 667 if (state == ST_DISCONNECT_PENDING)
19e52bcb 668 dp->hpd_state = ST_DISCONNECTED;
8ede2ecc
KH		 669
670 mutex_unlock(&dp->event_mutex);
671
672 return 0;
673}
674
675static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
676{
677 u32 state;
c58eb1b5 678 int ret;
8ede2ecc
KH		 679
680 mutex_lock(&dp->event_mutex);
681
682 /* irq_hpd can happen at either connected or disconnected state */
19e52bcb 683 state = dp->hpd_state;
f21c8a27 684 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
8ede2ecc
KH		 685 mutex_unlock(&dp->event_mutex);
686 return 0;
687 }
688
2b5f09ca
KH		 689 if (state == ST_CONNECT_PENDING) {
690 /* wait until ST_CONNECTED */
691 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
692 mutex_unlock(&dp->event_mutex);
693 return 0;
694 }
695
ea9f337c 696 if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
9fc41843
KH		 697 /* wait until ST_CONNECTED */
698 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
699 mutex_unlock(&dp->event_mutex);
700 return 0;
701 }
702
c58eb1b5
KH		 703 ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
704 if (ret == -ECONNRESET) { /* cable unplugged */
705 dp->core_initialized = false;
706 }
601f0479 707 DRM_DEBUG_DP("hpd_state=%d\n", state);
8ede2ecc
KH		 708
709 mutex_unlock(&dp->event_mutex);
710
711 return 0;
c943b494
CU		 712}
713
714static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
715{
d11a9369 716 dp_debug_put(dp->debug);
c943b494
CU		 717 dp_panel_put(dp->panel);
718 dp_aux_put(dp->aux);
d13e36d7 719 dp_audio_put(dp->audio);
c943b494
CU		 720}
721
722static int dp_init_sub_modules(struct dp_display_private *dp)
723{
724 int rc = 0;
725 struct device *dev = &dp->pdev->dev;
726 struct dp_usbpd_cb *cb = &dp->usbpd_cb;
727 struct dp_panel_in panel_in = {
728 .dev = dev,
729 };
730
731 /* Callback APIs used for cable status change event */
732 cb->configure = dp_display_usbpd_configure_cb;
733 cb->disconnect = dp_display_usbpd_disconnect_cb;
734 cb->attention = dp_display_usbpd_attention_cb;
735
736 dp->usbpd = dp_hpd_get(dev, cb);
737 if (IS_ERR(dp->usbpd)) {
738 rc = PTR_ERR(dp->usbpd);
739 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
740 dp->usbpd = NULL;
741 goto error;
742 }
743
744 dp->parser = dp_parser_get(dp->pdev);
745 if (IS_ERR(dp->parser)) {
746 rc = PTR_ERR(dp->parser);
747 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
748 dp->parser = NULL;
749 goto error;
750 }
751
752 dp->catalog = dp_catalog_get(dev, &dp->parser->io);
753 if (IS_ERR(dp->catalog)) {
754 rc = PTR_ERR(dp->catalog);
755 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
756 dp->catalog = NULL;
757 goto error;
758 }
759
ab387647 760 dp->power = dp_power_get(dev, dp->parser);
c943b494
CU		 761 if (IS_ERR(dp->power)) {
762 rc = PTR_ERR(dp->power);
763 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
764 dp->power = NULL;
765 goto error;
766 }
767
768 dp->aux = dp_aux_get(dev, dp->catalog);
769 if (IS_ERR(dp->aux)) {
770 rc = PTR_ERR(dp->aux);
771 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
772 dp->aux = NULL;
773 goto error;
774 }
775
776 dp->link = dp_link_get(dev, dp->aux);
777 if (IS_ERR(dp->link)) {
778 rc = PTR_ERR(dp->link);
779 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
780 dp->link = NULL;
781 goto error_link;
782 }
783
784 panel_in.aux = dp->aux;
785 panel_in.catalog = dp->catalog;
786 panel_in.link = dp->link;
787
788 dp->panel = dp_panel_get(&panel_in);
789 if (IS_ERR(dp->panel)) {
790 rc = PTR_ERR(dp->panel);
791 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
792 dp->panel = NULL;
793 goto error_link;
794 }
795
796 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
797 dp->power, dp->catalog, dp->parser);
798 if (IS_ERR(dp->ctrl)) {
799 rc = PTR_ERR(dp->ctrl);
800 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
801 dp->ctrl = NULL;
802 goto error_ctrl;
803 }
804
d13e36d7
AK		 805 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
806 if (IS_ERR(dp->audio)) {
807 rc = PTR_ERR(dp->audio);
808 pr_err("failed to initialize audio, rc = %d\n", rc);
809 dp->audio = NULL;
11120e93 810 goto error_ctrl;
d13e36d7
AK		 811 }
812
c943b494 813 return rc;
d13e36d7 814
c943b494
CU		 815error_ctrl:
816 dp_panel_put(dp->panel);
817error_link:
818 dp_aux_put(dp->aux);
819error:
820 return rc;
821}
822
823static int dp_display_set_mode(struct msm_dp *dp_display,
824 struct dp_display_mode *mode)
825{
826 struct dp_display_private *dp;
827
828 dp = container_of(dp_display, struct dp_display_private, dp_display);
829
830 dp->panel->dp_mode.drm_mode = mode->drm_mode;
831 dp->panel->dp_mode.bpp = mode->bpp;
832 dp->panel->dp_mode.capabilities = mode->capabilities;
833 dp_panel_init_panel_info(dp->panel);
834 return 0;
835}
836
837static int dp_display_prepare(struct msm_dp *dp)
838{
839 return 0;
840}
841
8ede2ecc 842static int dp_display_enable(struct dp_display_private *dp, u32 data)
c943b494
CU		 843{
844 int rc = 0;
158b9aa7 845 struct msm_dp *dp_display;
c943b494 846
158b9aa7
AK		 847 dp_display = g_dp_display;
848
601f0479 849 DRM_DEBUG_DP("sink_count=%d\n", dp->link->sink_count);
231a04fc
KH		 850 if (dp_display->power_on) {
851 DRM_DEBUG_DP("Link already setup, return\n");
852 return 0;
853 }
854
8ede2ecc 855 rc = dp_ctrl_on_stream(dp->ctrl);
c943b494 856 if (!rc)
158b9aa7 857 dp_display->power_on = true;
c943b494 858
c943b494
CU		 859 return rc;
860}
861
862static int dp_display_post_enable(struct msm_dp *dp_display)
863{
d13e36d7
AK		 864 struct dp_display_private *dp;
865 u32 rate;
866
867 dp = container_of(dp_display, struct dp_display_private, dp_display);
868
869 rate = dp->link->link_params.rate;
870
871 if (dp->audio_supported) {
872 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
873 dp->audio->lane_count = dp->link->link_params.num_lanes;
874 }
875
a1f5bda9
AK		 876 /* signal the connect event late to synchronize video and display */
877 dp_display_handle_plugged_change(dp_display, true);
c943b494
CU		 878 return 0;
879}
880
8ede2ecc 881static int dp_display_disable(struct dp_display_private *dp, u32 data)
c943b494 882{
158b9aa7
AK		 883 struct msm_dp *dp_display;
884
885 dp_display = g_dp_display;
886
231a04fc
KH		 887 if (!dp_display->power_on)
888 return 0;
889
158b9aa7
AK		 890 /* wait only if audio was enabled */
891 if (dp_display->audio_enabled) {
c703d578 892 /* signal the disconnect event */
c703d578 893 dp_display_handle_plugged_change(dp_display, false);
158b9aa7
AK		 894 if (!wait_for_completion_timeout(&dp->audio_comp,
895 HZ * 5))
896 DRM_ERROR("audio comp timeout\n");
897 }
898
899 dp_display->audio_enabled = false;
900
f21c8a27
KH		 901 /* triggered by irq_hpd with sink_count = 0 */
902 if (dp->link->sink_count == 0) {
903 dp_ctrl_off_link_stream(dp->ctrl);
904 } else {
905 dp_ctrl_off(dp->ctrl);
906 dp->core_initialized = false;
907 }
c943b494 908
158b9aa7 909 dp_display->power_on = false;
c943b494 910
601f0479 911 DRM_DEBUG_DP("sink count: %d\n", dp->link->sink_count);
c943b494
CU		 912 return 0;
913}
914
915static int dp_display_unprepare(struct msm_dp *dp)
916{
917 return 0;
918}
919
a1f5bda9
AK		 920int dp_display_set_plugged_cb(struct msm_dp *dp_display,
921 hdmi_codec_plugged_cb fn, struct device *codec_dev)
922{
923 bool plugged;
924
925 dp_display->plugged_cb = fn;
926 dp_display->codec_dev = codec_dev;
927 plugged = dp_display->is_connected;
928 dp_display_handle_plugged_change(dp_display, plugged);
929
930 return 0;
931}
932
c943b494
CU		 933int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
934{
935 const u32 num_components = 3, default_bpp = 24;
936 struct dp_display_private *dp_display;
937 struct dp_link_info *link_info;
938 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
939
940 if (!dp || !mode_pclk_khz || !dp->connector) {
941 DRM_ERROR("invalid params\n");
942 return -EINVAL;
943 }
944
945 dp_display = container_of(dp, struct dp_display_private, dp_display);
946 link_info = &dp_display->panel->link_info;
947
948 mode_bpp = dp->connector->display_info.bpc * num_components;
949 if (!mode_bpp)
950 mode_bpp = default_bpp;
951
952 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
953 mode_bpp, mode_pclk_khz);
954
955 mode_rate_khz = mode_pclk_khz * mode_bpp;
956 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
957
958 if (mode_rate_khz > supported_rate_khz)
959 return MODE_BAD;
960
961 return MODE_OK;
962}
963
964int dp_display_get_modes(struct msm_dp *dp,
965 struct dp_display_mode *dp_mode)
966{
967 struct dp_display_private *dp_display;
968 int ret = 0;
969
970 if (!dp) {
971 DRM_ERROR("invalid params\n");
972 return 0;
973 }
974
975 dp_display = container_of(dp, struct dp_display_private, dp_display);
976
977 ret = dp_panel_get_modes(dp_display->panel,
978 dp->connector, dp_mode);
979 if (dp_mode->drm_mode.clock)
980 dp->max_pclk_khz = dp_mode->drm_mode.clock;
981 return ret;
982}
983
984bool dp_display_check_video_test(struct msm_dp *dp)
985{
986 struct dp_display_private *dp_display;
987
988 dp_display = container_of(dp, struct dp_display_private, dp_display);
989
990 return dp_display->panel->video_test;
991}
992
993int dp_display_get_test_bpp(struct msm_dp *dp)
994{
995 struct dp_display_private *dp_display;
996
997 if (!dp) {
998 DRM_ERROR("invalid params\n");
999 return 0;
1000 }
1001
1002 dp_display = container_of(dp, struct dp_display_private, dp_display);
1003
1004 return dp_link_bit_depth_to_bpp(
1005 dp_display->link->test_video.test_bit_depth);
1006}
1007
eb9d6c7e 1008void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
0f6090f3
AK		 1009{
1010 struct dp_display_private *dp_display;
0f6090f3
AK		 1011
1012 dp_display = container_of(dp, struct dp_display_private, dp_display);
0f6090f3
AK		 1013
1014 /*
1015 * if we are reading registers we need the link clocks to be on
1016 * however till DP cable is connected this will not happen as we
1017 * do not know the resolution to power up with. Hence check the
1018 * power_on status before dumping DP registers to avoid crash due
1019 * to unclocked access
1020 */
1021 mutex_lock(&dp_display->event_mutex);
1022
1023 if (!dp->power_on) {
1024 mutex_unlock(&dp_display->event_mutex);
1025 return;
1026 }
1027
1028 dp_catalog_snapshot(dp_display->catalog, disp_state);
1029
1030 mutex_unlock(&dp_display->event_mutex);
1031}
1032
8ede2ecc
KH		 1033static void dp_display_config_hpd(struct dp_display_private *dp)
1034{
1035
ea9f337c 1036 dp_display_host_init(dp, true);
8ede2ecc
KH		 1037 dp_catalog_ctrl_hpd_config(dp->catalog);
1038
1039 /* Enable interrupt first time
1040 * we are leaving dp clocks on during disconnect
1041 * and never disable interrupt
1042 */
1043 enable_irq(dp->irq);
1044}
1045
1046static int hpd_event_thread(void *data)
1047{
1048 struct dp_display_private *dp_priv;
1049 unsigned long flag;
1050 struct dp_event *todo;
1051 int timeout_mode = 0;
1052
1053 dp_priv = (struct dp_display_private *)data;
1054
1055 while (1) {
1056 if (timeout_mode) {
1057 wait_event_timeout(dp_priv->event_q,
1058 (dp_priv->event_pndx == dp_priv->event_gndx),
1059 EVENT_TIMEOUT);
1060 } else {
710a040a
SB		 1061 wait_event_interruptible(dp_priv->event_q,
1062 (dp_priv->event_pndx != dp_priv->event_gndx));
8ede2ecc
KH		 1063 }
1064 spin_lock_irqsave(&dp_priv->event_lock, flag);
1065 todo = &dp_priv->event_list[dp_priv->event_gndx];
1066 if (todo->delay) {
1067 struct dp_event *todo_next;
1068
1069 dp_priv->event_gndx++;
1070 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1071
1072 /* re enter delay event into q */
1073 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1074 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1075 todo_next->event_id = todo->event_id;
1076 todo_next->data = todo->data;
1077 todo_next->delay = todo->delay - 1;
1078
1079 /* clean up older event */
1080 todo->event_id = EV_NO_EVENT;
1081 todo->delay = 0;
1082
1083 /* switch to timeout mode */
1084 timeout_mode = 1;
1085 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1086 continue;
1087 }
1088
1089 /* timeout with no events in q */
1090 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1091 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1092 continue;
1093 }
1094
1095 dp_priv->event_gndx++;
1096 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1097 timeout_mode = 0;
1098 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1099
1100 switch (todo->event_id) {
1101 case EV_HPD_INIT_SETUP:
1102 dp_display_config_hpd(dp_priv);
1103 break;
1104 case EV_HPD_PLUG_INT:
1105 dp_hpd_plug_handle(dp_priv, todo->data);
1106 break;
1107 case EV_HPD_UNPLUG_INT:
1108 dp_hpd_unplug_handle(dp_priv, todo->data);
1109 break;
1110 case EV_IRQ_HPD_INT:
1111 dp_irq_hpd_handle(dp_priv, todo->data);
1112 break;
1113 case EV_HPD_REPLUG_INT:
1114 /* do nothing */
1115 break;
1116 case EV_USER_NOTIFICATION:
1117 dp_display_send_hpd_notification(dp_priv,
1118 todo->data);
1119 break;
1120 case EV_CONNECT_PENDING_TIMEOUT:
1121 dp_connect_pending_timeout(dp_priv,
1122 todo->data);
1123 break;
1124 case EV_DISCONNECT_PENDING_TIMEOUT:
1125 dp_disconnect_pending_timeout(dp_priv,
1126 todo->data);
1127 break;
1128 default:
1129 break;
1130 }
1131 }
1132
1133 return 0;
1134}
1135
1136static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1137{
1138 init_waitqueue_head(&dp_priv->event_q);
1139 spin_lock_init(&dp_priv->event_lock);
1140
1141 kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1142}
1143
1144static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1145{
1146 struct dp_display_private *dp = dev_id;
1147 irqreturn_t ret = IRQ_HANDLED;
1148 u32 hpd_isr_status;
1149
1150 if (!dp) {
1151 DRM_ERROR("invalid data\n");
1152 return IRQ_NONE;
1153 }
1154
1155 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1156
601f0479 1157 DRM_DEBUG_DP("hpd isr status=%#x\n", hpd_isr_status);
8ede2ecc
KH		 1158 if (hpd_isr_status & 0x0F) {
1159 /* hpd related interrupts */
1160 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1161 hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1162 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1163 }
1164
1165 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
62671d2e 1166 /* stop sentinel connect pending checking */
8ede2ecc
KH		 1167 dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1168 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1169 }
1170
1171 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1172 dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1173
1174 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1175 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1176 }
1177
1178 /* DP controller isr */
1179 dp_ctrl_isr(dp->ctrl);
1180
1181 /* DP aux isr */
1182 dp_aux_isr(dp->aux);
1183
1184 return ret;
1185}
1186
1187int dp_display_request_irq(struct msm_dp *dp_display)
1188{
1189 int rc = 0;
1190 struct dp_display_private *dp;
1191
1192 if (!dp_display) {
1193 DRM_ERROR("invalid input\n");
1194 return -EINVAL;
1195 }
1196
1197 dp = container_of(dp_display, struct dp_display_private, dp_display);
1198
1199 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1200 if (dp->irq < 0) {
1201 rc = dp->irq;
1202 DRM_ERROR("failed to get irq: %d\n", rc);
1203 return rc;
1204 }
1205
1206 rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1207 dp_display_irq_handler,
1208 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1209 if (rc < 0) {
1210 DRM_ERROR("failed to request IRQ%u: %d\n",
1211 dp->irq, rc);
1212 return rc;
1213 }
1214 disable_irq(dp->irq);
1215
1216 return 0;
1217}
1218
c943b494
CU		 1219static int dp_display_probe(struct platform_device *pdev)
1220{
1221 int rc = 0;
1222 struct dp_display_private *dp;
1223
1224 if (!pdev || !pdev->dev.of_node) {
1225 DRM_ERROR("pdev not found\n");
1226 return -ENODEV;
1227 }
1228
1229 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1230 if (!dp)
1231 return -ENOMEM;
1232
c943b494
CU		 1233 dp->pdev = pdev;
1234 dp->name = "drm_dp";
1235
1236 rc = dp_init_sub_modules(dp);
1237 if (rc) {
1238 DRM_ERROR("init sub module failed\n");
1239 return -EPROBE_DEFER;
1240 }
1241
8ede2ecc 1242 mutex_init(&dp->event_mutex);
c943b494
CU		 1243 g_dp_display = &dp->dp_display;
1244
d13e36d7
AK		 1245 /* Store DP audio handle inside DP display */
1246 g_dp_display->dp_audio = dp->audio;
1247
158b9aa7
AK		 1248 init_completion(&dp->audio_comp);
1249
061eb621
AK		 1250 platform_set_drvdata(pdev, g_dp_display);
1251
c943b494
CU		 1252 rc = component_add(&pdev->dev, &dp_display_comp_ops);
1253 if (rc) {
1254 DRM_ERROR("component add failed, rc=%d\n", rc);
1255 dp_display_deinit_sub_modules(dp);
1256 }
1257
1258 return rc;
1259}
1260
1261static int dp_display_remove(struct platform_device *pdev)
1262{
1263 struct dp_display_private *dp;
1264
061eb621
AK		 1265 dp = container_of(g_dp_display,
1266 struct dp_display_private, dp_display);
c943b494
CU		 1267
1268 dp_display_deinit_sub_modules(dp);
1269
1270 component_del(&pdev->dev, &dp_display_comp_ops);
1271 platform_set_drvdata(pdev, NULL);
1272
1273 return 0;
1274}
1275
1276static int dp_pm_resume(struct device *dev)
1277{
19e52bcb
KH		 1278 struct platform_device *pdev = to_platform_device(dev);
1279 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1280 struct dp_display_private *dp;
e8a767e0 1281 int sink_count = 0;
19e52bcb
KH		 1282
1283 dp = container_of(dp_display, struct dp_display_private, dp_display);
1284
1285 mutex_lock(&dp->event_mutex);
1286
1287 /* start from disconnected state */
1288 dp->hpd_state = ST_DISCONNECTED;
1289
1290 /* turn on dp ctrl/phy */
ea9f337c 1291 dp_display_host_init(dp, true);
19e52bcb
KH		 1292
1293 dp_catalog_ctrl_hpd_config(dp->catalog);
1294
e8a767e0
KH		 1295 /*
1296 * set sink to normal operation mode -- D0
1297 * before dpcd read
1298 */
1299 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
1300
1301 if (dp_catalog_link_is_connected(dp->catalog)) {
1302 sink_count = drm_dp_read_sink_count(dp->aux);
1303 if (sink_count < 0)
1304 sink_count = 0;
1305 }
19e52bcb 1306
e8a767e0 1307 dp->link->sink_count = sink_count;
d9aa6571
KH		 1308 /*
1309 * can not declared display is connected unless
1310 * HDMI cable is plugged in and sink_count of
1311 * dongle become 1
1312 */
e8a767e0 1313 if (dp->link->sink_count)
19e52bcb 1314 dp->dp_display.is_connected = true;
62671d2e 1315 else
19e52bcb 1316 dp->dp_display.is_connected = false;
19e52bcb
KH		 1317
1318 mutex_unlock(&dp->event_mutex);
1319
c943b494
CU		 1320 return 0;
1321}
1322
1323static int dp_pm_suspend(struct device *dev)
1324{
8ede2ecc 1325 struct platform_device *pdev = to_platform_device(dev);
19e52bcb
KH		 1326 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1327 struct dp_display_private *dp;
8ede2ecc 1328
19e52bcb 1329 dp = container_of(dp_display, struct dp_display_private, dp_display);
8ede2ecc 1330
19e52bcb
KH		 1331 mutex_lock(&dp->event_mutex);
1332
f591dbb5
KH		 1333 if (dp->core_initialized == true) {
1334 /* mainlink enabled */
1335 if (dp_power_clk_status(dp->power, DP_CTRL_PM))
1336 dp_ctrl_off_link_stream(dp->ctrl);
1337
19e52bcb 1338 dp_display_host_deinit(dp);
f591dbb5 1339 }
19e52bcb
KH		 1340
1341 dp->hpd_state = ST_SUSPENDED;
1342
62671d2e
KH		 1343 /* host_init will be called at pm_resume */
1344 dp->core_initialized = false;
1345
19e52bcb 1346 mutex_unlock(&dp->event_mutex);
8ede2ecc 1347
c943b494
CU		 1348 return 0;
1349}
1350
1351static int dp_pm_prepare(struct device *dev)
1352{
1353 return 0;
1354}
1355
1356static void dp_pm_complete(struct device *dev)
1357{
1358
1359}
1360
1361static const struct dev_pm_ops dp_pm_ops = {
1362 .suspend = dp_pm_suspend,
1363 .resume = dp_pm_resume,
1364 .prepare = dp_pm_prepare,
1365 .complete = dp_pm_complete,
1366};
1367
1368static struct platform_driver dp_display_driver = {
1369 .probe = dp_display_probe,
1370 .remove = dp_display_remove,
1371 .driver = {
1372 .name = "msm-dp-display",
1373 .of_match_table = dp_dt_match,
1374 .suppress_bind_attrs = true,
1375 .pm = &dp_pm_ops,
1376 },
1377};
1378
1379int __init msm_dp_register(void)
1380{
1381 int ret;
1382
1383 ret = platform_driver_register(&dp_display_driver);
1384 if (ret)
1385 DRM_ERROR("Dp display driver register failed");
1386
1387 return ret;
1388}
1389
1390void __exit msm_dp_unregister(void)
1391{
1392 platform_driver_unregister(&dp_display_driver);
1393}
1394
220b856a
TS		 1395void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1396{
1397 struct dp_display_private *dp;
1398
1399 if (!dp_display)
1400 return;
1401
1402 dp = container_of(dp_display, struct dp_display_private, dp_display);
1403
8ede2ecc
KH		 1404 dp_hpd_event_setup(dp);
1405
1406 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
220b856a
TS		 1407}
1408
f913454a
AK		 1409void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1410{
1411 struct dp_display_private *dp;
1412 struct device *dev;
1413 int rc;
1414
1415 dp = container_of(dp_display, struct dp_display_private, dp_display);
1416 dev = &dp->pdev->dev;
1417
1418 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1419 dp->link, &dp->dp_display.connector,
1420 minor);
1421 if (IS_ERR(dp->debug)) {
1422 rc = PTR_ERR(dp->debug);
1423 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1424 dp->debug = NULL;
1425 }
1426}
1427
c943b494
CU		 1428int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1429 struct drm_encoder *encoder)
1430{
1431 struct msm_drm_private *priv;
1432 int ret;
1433
1434 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1435 return -EINVAL;
1436
1437 priv = dev->dev_private;
1438 dp_display->drm_dev = dev;
1439
1440 ret = dp_display_request_irq(dp_display);
1441 if (ret) {
1442 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1443 return ret;
1444 }
1445
1446 dp_display->encoder = encoder;
1447
1448 dp_display->connector = dp_drm_connector_init(dp_display);
1449 if (IS_ERR(dp_display->connector)) {
1450 ret = PTR_ERR(dp_display->connector);
1451 DRM_DEV_ERROR(dev->dev,
1452 "failed to create dp connector: %d\n", ret);
1453 dp_display->connector = NULL;
1454 return ret;
1455 }
1456
1457 priv->connectors[priv->num_connectors++] = dp_display->connector;
1458 return 0;
1459}
1460
1461int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1462{
1463 int rc = 0;
1464 struct dp_display_private *dp_display;
8ede2ecc 1465 u32 state;
c943b494
CU		 1466
1467 dp_display = container_of(dp, struct dp_display_private, dp_display);
1468 if (!dp_display->dp_mode.drm_mode.clock) {
1469 DRM_ERROR("invalid params\n");
1470 return -EINVAL;
1471 }
1472
8ede2ecc
KH		 1473 mutex_lock(&dp_display->event_mutex);
1474
62671d2e 1475 /* stop sentinel checking */
19e52bcb
KH		 1476 dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1477
c943b494
CU		 1478 rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1479 if (rc) {
1480 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
8ede2ecc 1481 mutex_unlock(&dp_display->event_mutex);
c943b494
CU		 1482 return rc;
1483 }
1484
1485 rc = dp_display_prepare(dp);
1486 if (rc) {
1487 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
8ede2ecc 1488 mutex_unlock(&dp_display->event_mutex);
c943b494
CU		 1489 return rc;
1490 }
1491
19e52bcb 1492 state = dp_display->hpd_state;
8ede2ecc 1493
62671d2e 1494 if (state == ST_DISPLAY_OFF)
ea9f337c 1495 dp_display_host_init(dp_display, true);
c943b494 1496
8ede2ecc
KH		 1497 dp_display_enable(dp_display, 0);
1498
c943b494
CU		 1499 rc = dp_display_post_enable(dp);
1500 if (rc) {
1501 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
8ede2ecc 1502 dp_display_disable(dp_display, 0);
c943b494
CU		 1503 dp_display_unprepare(dp);
1504 }
8ede2ecc 1505
62671d2e
KH		 1506 /* manual kick off plug event to train link */
1507 if (state == ST_DISPLAY_OFF)
8ede2ecc
KH		 1508 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1509
1510 /* completed connection */
19e52bcb 1511 dp_display->hpd_state = ST_CONNECTED;
8ede2ecc
KH		 1512
1513 mutex_unlock(&dp_display->event_mutex);
1514
c943b494 1515 return rc;
8ede2ecc
KH		 1516}
1517
1518int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1519{
1520 struct dp_display_private *dp_display;
1521
1522 dp_display = container_of(dp, struct dp_display_private, dp_display);
1523
1524 dp_ctrl_push_idle(dp_display->ctrl);
1525
1526 return 0;
c943b494
CU		 1527}
1528
1529int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1530{
1531 int rc = 0;
8ede2ecc
KH		 1532 u32 state;
1533 struct dp_display_private *dp_display;
c943b494 1534
8ede2ecc 1535 dp_display = container_of(dp, struct dp_display_private, dp_display);
c943b494 1536
8ede2ecc
KH		 1537 mutex_lock(&dp_display->event_mutex);
1538
62671d2e 1539 /* stop sentinel checking */
19e52bcb
KH		 1540 dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1541
8ede2ecc 1542 dp_display_disable(dp_display, 0);
c943b494
CU		 1543
1544 rc = dp_display_unprepare(dp);
1545 if (rc)
1546 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1547
19e52bcb 1548 state = dp_display->hpd_state;
8ede2ecc
KH		 1549 if (state == ST_DISCONNECT_PENDING) {
1550 /* completed disconnection */
19e52bcb 1551 dp_display->hpd_state = ST_DISCONNECTED;
8ede2ecc 1552 } else {
62671d2e 1553 dp_display->hpd_state = ST_DISPLAY_OFF;
8ede2ecc
KH		 1554 }
1555
1556 mutex_unlock(&dp_display->event_mutex);
c943b494
CU		 1557 return rc;
1558}
1559
1560void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1561 struct drm_display_mode *mode,
1562 struct drm_display_mode *adjusted_mode)
1563{
1564 struct dp_display_private *dp_display;
1565
1566 dp_display = container_of(dp, struct dp_display_private, dp_display);
1567
1568 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1569
1570 if (dp_display_check_video_test(dp))
1571 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1572 else /* Default num_components per pixel = 3 */
1573 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1574
1575 if (!dp_display->dp_mode.bpp)
1576 dp_display->dp_mode.bpp = 24; /* Default bpp */
1577
1578 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1579
1580 dp_display->dp_mode.v_active_low =
1581 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1582
1583 dp_display->dp_mode.h_active_low =
1584 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1585}
Linux 6.x block layer and io_uring tree(s)