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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/module.h>
7#include <linux/slab.h>
8#include <linux/uaccess.h>
9#include <linux/debugfs.h>
10#include <linux/component.h>
11#include <linux/of_irq.h>
12#include <linux/delay.h>
13#include <drm/display/drm_dp_aux_bus.h>
14
15#include "msm_drv.h"
16#include "msm_kms.h"
17#include "dp_hpd.h"
18#include "dp_parser.h"
19#include "dp_power.h"
20#include "dp_catalog.h"
21#include "dp_aux.h"
22#include "dp_reg.h"
23#include "dp_link.h"
24#include "dp_panel.h"
25#include "dp_ctrl.h"
26#include "dp_display.h"
27#include "dp_drm.h"
28#include "dp_audio.h"
29#include "dp_debug.h"
30
31#define HPD_STRING_SIZE 30
32
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_MAINLINK_READY,
46 ST_CONNECTED,
47 ST_DISCONNECT_PENDING,
48 ST_DISPLAY_OFF,
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_UNPLUG_INT,
59 EV_USER_NOTIFICATION,
60};
61
62#define EVENT_TIMEOUT (HZ/10) /* 100ms */
63#define DP_EVENT_Q_MAX 8
64
65#define DP_TIMEOUT_NONE 0
66
67#define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
68
69struct dp_event {
70 u32 event_id;
71 u32 data;
72 u32 delay;
73};
74
75struct dp_display_private {
76 char *name;
77 int irq;
78
79 unsigned int id;
80
81 /* state variables */
82 bool core_initialized;
83 bool phy_initialized;
84 bool hpd_irq_on;
85 bool audio_supported;
86
87 struct drm_device *drm_dev;
88 struct platform_device *pdev;
89 struct dentry *root;
90
91 struct dp_usbpd *usbpd;
92 struct dp_parser *parser;
93 struct dp_power *power;
94 struct dp_catalog *catalog;
95 struct drm_dp_aux *aux;
96 struct dp_link *link;
97 struct dp_panel *panel;
98 struct dp_ctrl *ctrl;
99 struct dp_debug *debug;
100
101 struct dp_usbpd_cb usbpd_cb;
102 struct dp_display_mode dp_mode;
103 struct msm_dp dp_display;
104
105 /* wait for audio signaling */
106 struct completion audio_comp;
107
108 /* event related only access by event thread */
109 struct mutex event_mutex;
110 wait_queue_head_t event_q;
111 u32 hpd_state;
112 u32 event_pndx;
113 u32 event_gndx;
114 struct task_struct *ev_tsk;
115 struct dp_event event_list[DP_EVENT_Q_MAX];
116 spinlock_t event_lock;
117
118 bool wide_bus_en;
119
120 struct dp_audio *audio;
121};
122
123struct msm_dp_desc {
124 phys_addr_t io_start;
125 unsigned int connector_type;
126 bool wide_bus_en;
127};
128
129struct msm_dp_config {
130 const struct msm_dp_desc *descs;
131 size_t num_descs;
132};
133
134static const struct msm_dp_desc sc7180_dp_descs[] = {
135 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
136};
137
138static const struct msm_dp_config sc7180_dp_cfg = {
139 .descs = sc7180_dp_descs,
140 .num_descs = ARRAY_SIZE(sc7180_dp_descs),
141};
142
143static const struct msm_dp_desc sc7280_dp_descs[] = {
144 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
145 [MSM_DP_CONTROLLER_1] = { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
146};
147
148static const struct msm_dp_config sc7280_dp_cfg = {
149 .descs = sc7280_dp_descs,
150 .num_descs = ARRAY_SIZE(sc7280_dp_descs),
151};
152
153static const struct msm_dp_desc sc8180x_dp_descs[] = {
154 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
155 [MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
156 [MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP },
157};
158
159static const struct msm_dp_config sc8180x_dp_cfg = {
160 .descs = sc8180x_dp_descs,
161 .num_descs = ARRAY_SIZE(sc8180x_dp_descs),
162};
163
164static const struct msm_dp_desc sm8350_dp_descs[] = {
165 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
166};
167
168static const struct msm_dp_config sm8350_dp_cfg = {
169 .descs = sm8350_dp_descs,
170 .num_descs = ARRAY_SIZE(sm8350_dp_descs),
171};
172
173static const struct of_device_id dp_dt_match[] = {
174 { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg },
175 { .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_cfg },
176 { .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_cfg },
177 { .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_cfg },
178 { .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_cfg },
179 { .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_cfg },
180 {}
181};
182
183static struct dp_display_private *dev_get_dp_display_private(struct device *dev)
184{
185 struct msm_dp *dp = dev_get_drvdata(dev);
186
187 return container_of(dp, struct dp_display_private, dp_display);
188}
189
190static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
191 u32 data, u32 delay)
192{
193 unsigned long flag;
194 struct dp_event *todo;
195 int pndx;
196
197 spin_lock_irqsave(&dp_priv->event_lock, flag);
198 pndx = dp_priv->event_pndx + 1;
199 pndx %= DP_EVENT_Q_MAX;
200 if (pndx == dp_priv->event_gndx) {
201 pr_err("event_q is full: pndx=%d gndx=%d\n",
202 dp_priv->event_pndx, dp_priv->event_gndx);
203 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
204 return -EPERM;
205 }
206 todo = &dp_priv->event_list[dp_priv->event_pndx++];
207 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
208 todo->event_id = event;
209 todo->data = data;
210 todo->delay = delay;
211 wake_up(&dp_priv->event_q);
212 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
213
214 return 0;
215}
216
217static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
218{
219 unsigned long flag;
220 struct dp_event *todo;
221 u32 gndx;
222
223 spin_lock_irqsave(&dp_priv->event_lock, flag);
224 if (dp_priv->event_pndx == dp_priv->event_gndx) {
225 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
226 return -ENOENT;
227 }
228
229 gndx = dp_priv->event_gndx;
230 while (dp_priv->event_pndx != gndx) {
231 todo = &dp_priv->event_list[gndx];
232 if (todo->event_id == event) {
233 todo->event_id = EV_NO_EVENT; /* deleted */
234 todo->delay = 0;
235 }
236 gndx++;
237 gndx %= DP_EVENT_Q_MAX;
238 }
239 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
240
241 return 0;
242}
243
244void dp_display_signal_audio_start(struct msm_dp *dp_display)
245{
246 struct dp_display_private *dp;
247
248 dp = container_of(dp_display, struct dp_display_private, dp_display);
249
250 reinit_completion(&dp->audio_comp);
251}
252
253void dp_display_signal_audio_complete(struct msm_dp *dp_display)
254{
255 struct dp_display_private *dp;
256
257 dp = container_of(dp_display, struct dp_display_private, dp_display);
258
259 complete_all(&dp->audio_comp);
260}
261
262static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv);
263
264static int dp_display_bind(struct device *dev, struct device *master,
265 void *data)
266{
267 int rc = 0;
268 struct dp_display_private *dp = dev_get_dp_display_private(dev);
269 struct msm_drm_private *priv = dev_get_drvdata(master);
270 struct drm_device *drm = priv->dev;
271
272 dp->dp_display.drm_dev = drm;
273 priv->dp[dp->id] = &dp->dp_display;
274
275 rc = dp->parser->parse(dp->parser);
276 if (rc) {
277 DRM_ERROR("device tree parsing failed\n");
278 goto end;
279 }
280
281
282 dp->drm_dev = drm;
283 dp->aux->drm_dev = drm;
284 rc = dp_aux_register(dp->aux);
285 if (rc) {
286 DRM_ERROR("DRM DP AUX register failed\n");
287 goto end;
288 }
289
290 rc = dp_power_client_init(dp->power);
291 if (rc) {
292 DRM_ERROR("Power client create failed\n");
293 goto end;
294 }
295
296 rc = dp_register_audio_driver(dev, dp->audio);
297 if (rc) {
298 DRM_ERROR("Audio registration Dp failed\n");
299 goto end;
300 }
301
302 rc = dp_hpd_event_thread_start(dp);
303 if (rc) {
304 DRM_ERROR("Event thread create failed\n");
305 goto end;
306 }
307
308 return 0;
309end:
310 return rc;
311}
312
313static void dp_display_unbind(struct device *dev, struct device *master,
314 void *data)
315{
316 struct dp_display_private *dp = dev_get_dp_display_private(dev);
317 struct msm_drm_private *priv = dev_get_drvdata(master);
318
319 /* disable all HPD interrupts */
320 if (dp->core_initialized)
321 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
322
323 kthread_stop(dp->ev_tsk);
324
325 dp_power_client_deinit(dp->power);
326 dp_aux_unregister(dp->aux);
327 dp->drm_dev = NULL;
328 dp->aux->drm_dev = NULL;
329 priv->dp[dp->id] = NULL;
330}
331
332static const struct component_ops dp_display_comp_ops = {
333 .bind = dp_display_bind,
334 .unbind = dp_display_unbind,
335};
336
337static bool dp_display_is_ds_bridge(struct dp_panel *panel)
338{
339 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
340 DP_DWN_STRM_PORT_PRESENT);
341}
342
343static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
344{
345 drm_dbg_dp(dp->drm_dev, "present=%#x sink_count=%d\n",
346 dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT],
347 dp->link->sink_count);
348 return dp_display_is_ds_bridge(dp->panel) &&
349 (dp->link->sink_count == 0);
350}
351
352static void dp_display_send_hpd_event(struct msm_dp *dp_display)
353{
354 struct dp_display_private *dp;
355 struct drm_connector *connector;
356
357 dp = container_of(dp_display, struct dp_display_private, dp_display);
358
359 connector = dp->dp_display.connector;
360 drm_helper_hpd_irq_event(connector->dev);
361}
362
363
364static int dp_display_send_hpd_notification(struct dp_display_private *dp,
365 bool hpd)
366{
367 if ((hpd && dp->dp_display.is_connected) ||
368 (!hpd && !dp->dp_display.is_connected)) {
369 drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
370 (hpd ? "on" : "off"));
371 return 0;
372 }
373
374 /* reset video pattern flag on disconnect */
375 if (!hpd)
376 dp->panel->video_test = false;
377
378 dp->dp_display.is_connected = hpd;
379
380 drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
381 dp->dp_display.connector_type, hpd);
382 dp_display_send_hpd_event(&dp->dp_display);
383
384 return 0;
385}
386
387static int dp_display_process_hpd_high(struct dp_display_private *dp)
388{
389 int rc = 0;
390 struct edid *edid;
391
392 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
393
394 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
395 if (rc)
396 goto end;
397
398 dp_link_process_request(dp->link);
399
400 edid = dp->panel->edid;
401
402 dp->audio_supported = drm_detect_monitor_audio(edid);
403 dp_panel_handle_sink_request(dp->panel);
404
405 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
406
407 /*
408 * set sink to normal operation mode -- D0
409 * before dpcd read
410 */
411 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
412
413 dp_link_reset_phy_params_vx_px(dp->link);
414 rc = dp_ctrl_on_link(dp->ctrl);
415 if (rc) {
416 DRM_ERROR("failed to complete DP link training\n");
417 goto end;
418 }
419
420 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
421
422end:
423 return rc;
424}
425
426static void dp_display_host_phy_init(struct dp_display_private *dp)
427{
428 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
429 dp->dp_display.connector_type, dp->core_initialized,
430 dp->phy_initialized);
431
432 if (!dp->phy_initialized) {
433 dp_ctrl_phy_init(dp->ctrl);
434 dp->phy_initialized = true;
435 }
436}
437
438static void dp_display_host_phy_exit(struct dp_display_private *dp)
439{
440 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
441 dp->dp_display.connector_type, dp->core_initialized,
442 dp->phy_initialized);
443
444 if (dp->phy_initialized) {
445 dp_ctrl_phy_exit(dp->ctrl);
446 dp->phy_initialized = false;
447 }
448}
449
450static void dp_display_host_init(struct dp_display_private *dp)
451{
452 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
453 dp->dp_display.connector_type, dp->core_initialized,
454 dp->phy_initialized);
455
456 dp_power_init(dp->power, false);
457 dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
458 dp_aux_init(dp->aux);
459 dp->core_initialized = true;
460}
461
462static void dp_display_host_deinit(struct dp_display_private *dp)
463{
464 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
465 dp->dp_display.connector_type, dp->core_initialized,
466 dp->phy_initialized);
467
468 dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
469 dp_aux_deinit(dp->aux);
470 dp_power_deinit(dp->power);
471 dp->core_initialized = false;
472}
473
474static int dp_display_usbpd_configure_cb(struct device *dev)
475{
476 struct dp_display_private *dp = dev_get_dp_display_private(dev);
477
478 dp_display_host_phy_init(dp);
479
480 return dp_display_process_hpd_high(dp);
481}
482
483static int dp_display_usbpd_disconnect_cb(struct device *dev)
484{
485 return 0;
486}
487
488static int dp_display_notify_disconnect(struct device *dev)
489{
490 struct dp_display_private *dp = dev_get_dp_display_private(dev);
491
492 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
493
494 return 0;
495}
496
497static void dp_display_handle_video_request(struct dp_display_private *dp)
498{
499 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
500 dp->panel->video_test = true;
501 dp_link_send_test_response(dp->link);
502 }
503}
504
505static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
506{
507 int rc = 0;
508
509 if (dp_display_is_sink_count_zero(dp)) {
510 drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n");
511 if (dp->hpd_state != ST_DISCONNECTED) {
512 dp->hpd_state = ST_DISCONNECT_PENDING;
513 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
514 }
515 } else {
516 if (dp->hpd_state == ST_DISCONNECTED) {
517 dp->hpd_state = ST_MAINLINK_READY;
518 rc = dp_display_process_hpd_high(dp);
519 if (rc)
520 dp->hpd_state = ST_DISCONNECTED;
521 }
522 }
523
524 return rc;
525}
526
527static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
528{
529 u32 sink_request = dp->link->sink_request;
530
531 drm_dbg_dp(dp->drm_dev, "%d\n", sink_request);
532 if (dp->hpd_state == ST_DISCONNECTED) {
533 if (sink_request & DP_LINK_STATUS_UPDATED) {
534 drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n",
535 sink_request);
536 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
537 return -EINVAL;
538 }
539 }
540
541 dp_ctrl_handle_sink_request(dp->ctrl);
542
543 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
544 dp_display_handle_video_request(dp);
545
546 return 0;
547}
548
549static int dp_display_usbpd_attention_cb(struct device *dev)
550{
551 int rc = 0;
552 u32 sink_request;
553 struct dp_display_private *dp = dev_get_dp_display_private(dev);
554
555 /* check for any test request issued by sink */
556 rc = dp_link_process_request(dp->link);
557 if (!rc) {
558 sink_request = dp->link->sink_request;
559 drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n",
560 dp->hpd_state, sink_request);
561 if (sink_request & DS_PORT_STATUS_CHANGED)
562 rc = dp_display_handle_port_ststus_changed(dp);
563 else
564 rc = dp_display_handle_irq_hpd(dp);
565 }
566
567 return rc;
568}
569
570static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
571{
572 struct dp_usbpd *hpd = dp->usbpd;
573 u32 state;
574 int ret;
575
576 if (!hpd)
577 return 0;
578
579 mutex_lock(&dp->event_mutex);
580
581 state = dp->hpd_state;
582 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
583 dp->dp_display.connector_type, state);
584
585 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
586 mutex_unlock(&dp->event_mutex);
587 return 0;
588 }
589
590 if (state == ST_MAINLINK_READY || state == ST_CONNECTED) {
591 mutex_unlock(&dp->event_mutex);
592 return 0;
593 }
594
595 if (state == ST_DISCONNECT_PENDING) {
596 /* wait until ST_DISCONNECTED */
597 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
598 mutex_unlock(&dp->event_mutex);
599 return 0;
600 }
601
602 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
603 if (ret) { /* link train failed */
604 dp->hpd_state = ST_DISCONNECTED;
605 } else {
606 dp->hpd_state = ST_MAINLINK_READY;
607 }
608
609 /* enable HDP irq_hpd/replug interrupt */
610 dp_catalog_hpd_config_intr(dp->catalog,
611 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);
612
613 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
614 dp->dp_display.connector_type, state);
615 mutex_unlock(&dp->event_mutex);
616
617 /* uevent will complete connection part */
618 return 0;
619};
620
621static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
622 bool plugged)
623{
624 struct dp_display_private *dp;
625
626 dp = container_of(dp_display,
627 struct dp_display_private, dp_display);
628
629 /* notify audio subsystem only if sink supports audio */
630 if (dp_display->plugged_cb && dp_display->codec_dev &&
631 dp->audio_supported)
632 dp_display->plugged_cb(dp_display->codec_dev, plugged);
633}
634
635static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
636{
637 struct dp_usbpd *hpd = dp->usbpd;
638 u32 state;
639
640 if (!hpd)
641 return 0;
642
643 mutex_lock(&dp->event_mutex);
644
645 state = dp->hpd_state;
646
647 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
648 dp->dp_display.connector_type, state);
649
650 /* disable irq_hpd/replug interrupts */
651 dp_catalog_hpd_config_intr(dp->catalog,
652 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);
653
654 /* unplugged, no more irq_hpd handle */
655 dp_del_event(dp, EV_IRQ_HPD_INT);
656
657 if (state == ST_DISCONNECTED) {
658 /* triggered by irq_hdp with sink_count = 0 */
659 if (dp->link->sink_count == 0) {
660 dp_display_host_phy_exit(dp);
661 }
662 dp_display_notify_disconnect(&dp->pdev->dev);
663 mutex_unlock(&dp->event_mutex);
664 return 0;
665 } else if (state == ST_DISCONNECT_PENDING) {
666 mutex_unlock(&dp->event_mutex);
667 return 0;
668 } else if (state == ST_MAINLINK_READY) {
669 dp_ctrl_off_link(dp->ctrl);
670 dp_display_host_phy_exit(dp);
671 dp->hpd_state = ST_DISCONNECTED;
672 dp_display_notify_disconnect(&dp->pdev->dev);
673 mutex_unlock(&dp->event_mutex);
674 return 0;
675 }
676
677 /* disable HPD plug interrupts */
678 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
679
680 /*
681 * We don't need separate work for disconnect as
682 * connect/attention interrupts are disabled
683 */
684 dp_display_notify_disconnect(&dp->pdev->dev);
685
686 if (state == ST_DISPLAY_OFF) {
687 dp->hpd_state = ST_DISCONNECTED;
688 } else {
689 dp->hpd_state = ST_DISCONNECT_PENDING;
690 }
691
692 /* signal the disconnect event early to ensure proper teardown */
693 dp_display_handle_plugged_change(&dp->dp_display, false);
694
695 /* enable HDP plug interrupt to prepare for next plugin */
696 if (!dp->dp_display.is_edp)
697 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
698
699 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
700 dp->dp_display.connector_type, state);
701
702 /* uevent will complete disconnection part */
703 mutex_unlock(&dp->event_mutex);
704 return 0;
705}
706
707static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
708{
709 u32 state;
710
711 mutex_lock(&dp->event_mutex);
712
713 /* irq_hpd can happen at either connected or disconnected state */
714 state = dp->hpd_state;
715 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
716 dp->dp_display.connector_type, state);
717
718 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
719 mutex_unlock(&dp->event_mutex);
720 return 0;
721 }
722
723 if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
724 /* wait until ST_CONNECTED */
725 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
726 mutex_unlock(&dp->event_mutex);
727 return 0;
728 }
729
730 dp_display_usbpd_attention_cb(&dp->pdev->dev);
731
732 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
733 dp->dp_display.connector_type, state);
734
735 mutex_unlock(&dp->event_mutex);
736
737 return 0;
738}
739
740static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
741{
742 dp_debug_put(dp->debug);
743 dp_audio_put(dp->audio);
744 dp_panel_put(dp->panel);
745 dp_aux_put(dp->aux);
746}
747
748static int dp_init_sub_modules(struct dp_display_private *dp)
749{
750 int rc = 0;
751 struct device *dev = &dp->pdev->dev;
752 struct dp_usbpd_cb *cb = &dp->usbpd_cb;
753 struct dp_panel_in panel_in = {
754 .dev = dev,
755 };
756
757 /* Callback APIs used for cable status change event */
758 cb->configure = dp_display_usbpd_configure_cb;
759 cb->disconnect = dp_display_usbpd_disconnect_cb;
760 cb->attention = dp_display_usbpd_attention_cb;
761
762 dp->usbpd = dp_hpd_get(dev, cb);
763 if (IS_ERR(dp->usbpd)) {
764 rc = PTR_ERR(dp->usbpd);
765 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
766 dp->usbpd = NULL;
767 goto error;
768 }
769
770 dp->parser = dp_parser_get(dp->pdev);
771 if (IS_ERR(dp->parser)) {
772 rc = PTR_ERR(dp->parser);
773 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
774 dp->parser = NULL;
775 goto error;
776 }
777
778 dp->catalog = dp_catalog_get(dev, &dp->parser->io);
779 if (IS_ERR(dp->catalog)) {
780 rc = PTR_ERR(dp->catalog);
781 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
782 dp->catalog = NULL;
783 goto error;
784 }
785
786 dp->power = dp_power_get(dev, dp->parser);
787 if (IS_ERR(dp->power)) {
788 rc = PTR_ERR(dp->power);
789 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
790 dp->power = NULL;
791 goto error;
792 }
793
794 dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp);
795 if (IS_ERR(dp->aux)) {
796 rc = PTR_ERR(dp->aux);
797 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
798 dp->aux = NULL;
799 goto error;
800 }
801
802 dp->link = dp_link_get(dev, dp->aux);
803 if (IS_ERR(dp->link)) {
804 rc = PTR_ERR(dp->link);
805 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
806 dp->link = NULL;
807 goto error_link;
808 }
809
810 panel_in.aux = dp->aux;
811 panel_in.catalog = dp->catalog;
812 panel_in.link = dp->link;
813
814 dp->panel = dp_panel_get(&panel_in);
815 if (IS_ERR(dp->panel)) {
816 rc = PTR_ERR(dp->panel);
817 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
818 dp->panel = NULL;
819 goto error_link;
820 }
821
822 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
823 dp->power, dp->catalog, dp->parser);
824 if (IS_ERR(dp->ctrl)) {
825 rc = PTR_ERR(dp->ctrl);
826 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
827 dp->ctrl = NULL;
828 goto error_ctrl;
829 }
830
831 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
832 if (IS_ERR(dp->audio)) {
833 rc = PTR_ERR(dp->audio);
834 pr_err("failed to initialize audio, rc = %d\n", rc);
835 dp->audio = NULL;
836 goto error_ctrl;
837 }
838
839 /* populate wide_bus_en to differernt layers */
840 dp->ctrl->wide_bus_en = dp->wide_bus_en;
841 dp->catalog->wide_bus_en = dp->wide_bus_en;
842
843 return rc;
844
845error_ctrl:
846 dp_panel_put(dp->panel);
847error_link:
848 dp_aux_put(dp->aux);
849error:
850 return rc;
851}
852
853static int dp_display_set_mode(struct msm_dp *dp_display,
854 struct dp_display_mode *mode)
855{
856 struct dp_display_private *dp;
857
858 dp = container_of(dp_display, struct dp_display_private, dp_display);
859
860 drm_mode_copy(&dp->panel->dp_mode.drm_mode, &mode->drm_mode);
861 dp->panel->dp_mode.bpp = mode->bpp;
862 dp->panel->dp_mode.capabilities = mode->capabilities;
863 dp_panel_init_panel_info(dp->panel);
864 return 0;
865}
866
867static int dp_display_enable(struct dp_display_private *dp, bool force_link_train)
868{
869 int rc = 0;
870 struct msm_dp *dp_display = &dp->dp_display;
871
872 drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
873 if (dp_display->power_on) {
874 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
875 return 0;
876 }
877
878 rc = dp_ctrl_on_stream(dp->ctrl, force_link_train);
879 if (!rc)
880 dp_display->power_on = true;
881
882 return rc;
883}
884
885static int dp_display_post_enable(struct msm_dp *dp_display)
886{
887 struct dp_display_private *dp;
888 u32 rate;
889
890 dp = container_of(dp_display, struct dp_display_private, dp_display);
891
892 rate = dp->link->link_params.rate;
893
894 if (dp->audio_supported) {
895 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
896 dp->audio->lane_count = dp->link->link_params.num_lanes;
897 }
898
899 /* signal the connect event late to synchronize video and display */
900 dp_display_handle_plugged_change(dp_display, true);
901 return 0;
902}
903
904static int dp_display_disable(struct dp_display_private *dp)
905{
906 struct msm_dp *dp_display = &dp->dp_display;
907
908 if (!dp_display->power_on)
909 return 0;
910
911 /* wait only if audio was enabled */
912 if (dp_display->audio_enabled) {
913 /* signal the disconnect event */
914 dp_display_handle_plugged_change(dp_display, false);
915 if (!wait_for_completion_timeout(&dp->audio_comp,
916 HZ * 5))
917 DRM_ERROR("audio comp timeout\n");
918 }
919
920 dp_display->audio_enabled = false;
921
922 if (dp->link->sink_count == 0) {
923 /*
924 * irq_hpd with sink_count = 0
925 * hdmi unplugged out of dongle
926 */
927 dp_ctrl_off_link_stream(dp->ctrl);
928 } else {
929 /*
930 * unplugged interrupt
931 * dongle unplugged out of DUT
932 */
933 dp_ctrl_off(dp->ctrl);
934 dp_display_host_phy_exit(dp);
935 }
936
937 dp_display->power_on = false;
938
939 drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
940 return 0;
941}
942
943int dp_display_set_plugged_cb(struct msm_dp *dp_display,
944 hdmi_codec_plugged_cb fn, struct device *codec_dev)
945{
946 bool plugged;
947
948 dp_display->plugged_cb = fn;
949 dp_display->codec_dev = codec_dev;
950 plugged = dp_display->is_connected;
951 dp_display_handle_plugged_change(dp_display, plugged);
952
953 return 0;
954}
955
956/**
957 * dp_bridge_mode_valid - callback to determine if specified mode is valid
958 * @bridge: Pointer to drm bridge structure
959 * @info: display info
960 * @mode: Pointer to drm mode structure
961 * Returns: Validity status for specified mode
962 */
963enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
964 const struct drm_display_info *info,
965 const struct drm_display_mode *mode)
966{
967 const u32 num_components = 3, default_bpp = 24;
968 struct dp_display_private *dp_display;
969 struct dp_link_info *link_info;
970 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
971 struct msm_dp *dp;
972 int mode_pclk_khz = mode->clock;
973
974 dp = to_dp_bridge(bridge)->dp_display;
975
976 if (!dp || !mode_pclk_khz || !dp->connector) {
977 DRM_ERROR("invalid params\n");
978 return -EINVAL;
979 }
980
981 /*
982 * The eDP controller currently does not have a reliable way of
983 * enabling panel power to read sink capabilities. So, we rely
984 * on the panel driver to populate only supported modes for now.
985 */
986 if (dp->is_edp)
987 return MODE_OK;
988
989 if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)
990 return MODE_CLOCK_HIGH;
991
992 dp_display = container_of(dp, struct dp_display_private, dp_display);
993 link_info = &dp_display->panel->link_info;
994
995 mode_bpp = dp->connector->display_info.bpc * num_components;
996 if (!mode_bpp)
997 mode_bpp = default_bpp;
998
999 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
1000 mode_bpp, mode_pclk_khz);
1001
1002 mode_rate_khz = mode_pclk_khz * mode_bpp;
1003 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
1004
1005 if (mode_rate_khz > supported_rate_khz)
1006 return MODE_BAD;
1007
1008 return MODE_OK;
1009}
1010
1011int dp_display_get_modes(struct msm_dp *dp)
1012{
1013 struct dp_display_private *dp_display;
1014
1015 if (!dp) {
1016 DRM_ERROR("invalid params\n");
1017 return 0;
1018 }
1019
1020 dp_display = container_of(dp, struct dp_display_private, dp_display);
1021
1022 return dp_panel_get_modes(dp_display->panel,
1023 dp->connector);
1024}
1025
1026bool dp_display_check_video_test(struct msm_dp *dp)
1027{
1028 struct dp_display_private *dp_display;
1029
1030 dp_display = container_of(dp, struct dp_display_private, dp_display);
1031
1032 return dp_display->panel->video_test;
1033}
1034
1035int dp_display_get_test_bpp(struct msm_dp *dp)
1036{
1037 struct dp_display_private *dp_display;
1038
1039 if (!dp) {
1040 DRM_ERROR("invalid params\n");
1041 return 0;
1042 }
1043
1044 dp_display = container_of(dp, struct dp_display_private, dp_display);
1045
1046 return dp_link_bit_depth_to_bpp(
1047 dp_display->link->test_video.test_bit_depth);
1048}
1049
1050void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
1051{
1052 struct dp_display_private *dp_display;
1053
1054 dp_display = container_of(dp, struct dp_display_private, dp_display);
1055
1056 /*
1057 * if we are reading registers we need the link clocks to be on
1058 * however till DP cable is connected this will not happen as we
1059 * do not know the resolution to power up with. Hence check the
1060 * power_on status before dumping DP registers to avoid crash due
1061 * to unclocked access
1062 */
1063 mutex_lock(&dp_display->event_mutex);
1064
1065 if (!dp->power_on) {
1066 mutex_unlock(&dp_display->event_mutex);
1067 return;
1068 }
1069
1070 dp_catalog_snapshot(dp_display->catalog, disp_state);
1071
1072 mutex_unlock(&dp_display->event_mutex);
1073}
1074
1075static void dp_display_config_hpd(struct dp_display_private *dp)
1076{
1077
1078 dp_display_host_init(dp);
1079 dp_catalog_ctrl_hpd_config(dp->catalog);
1080
1081 /* Enable plug and unplug interrupts only for external DisplayPort */
1082 if (!dp->dp_display.is_edp)
1083 dp_catalog_hpd_config_intr(dp->catalog,
1084 DP_DP_HPD_PLUG_INT_MASK |
1085 DP_DP_HPD_UNPLUG_INT_MASK,
1086 true);
1087
1088 /* Enable interrupt first time
1089 * we are leaving dp clocks on during disconnect
1090 * and never disable interrupt
1091 */
1092 enable_irq(dp->irq);
1093}
1094
1095static int hpd_event_thread(void *data)
1096{
1097 struct dp_display_private *dp_priv;
1098 unsigned long flag;
1099 struct dp_event *todo;
1100 int timeout_mode = 0;
1101
1102 dp_priv = (struct dp_display_private *)data;
1103
1104 while (1) {
1105 if (timeout_mode) {
1106 wait_event_timeout(dp_priv->event_q,
1107 (dp_priv->event_pndx == dp_priv->event_gndx) ||
1108 kthread_should_stop(), EVENT_TIMEOUT);
1109 } else {
1110 wait_event_interruptible(dp_priv->event_q,
1111 (dp_priv->event_pndx != dp_priv->event_gndx) ||
1112 kthread_should_stop());
1113 }
1114
1115 if (kthread_should_stop())
1116 break;
1117
1118 spin_lock_irqsave(&dp_priv->event_lock, flag);
1119 todo = &dp_priv->event_list[dp_priv->event_gndx];
1120 if (todo->delay) {
1121 struct dp_event *todo_next;
1122
1123 dp_priv->event_gndx++;
1124 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1125
1126 /* re enter delay event into q */
1127 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1128 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1129 todo_next->event_id = todo->event_id;
1130 todo_next->data = todo->data;
1131 todo_next->delay = todo->delay - 1;
1132
1133 /* clean up older event */
1134 todo->event_id = EV_NO_EVENT;
1135 todo->delay = 0;
1136
1137 /* switch to timeout mode */
1138 timeout_mode = 1;
1139 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1140 continue;
1141 }
1142
1143 /* timeout with no events in q */
1144 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1145 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1146 continue;
1147 }
1148
1149 dp_priv->event_gndx++;
1150 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1151 timeout_mode = 0;
1152 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1153
1154 switch (todo->event_id) {
1155 case EV_HPD_INIT_SETUP:
1156 dp_display_config_hpd(dp_priv);
1157 break;
1158 case EV_HPD_PLUG_INT:
1159 dp_hpd_plug_handle(dp_priv, todo->data);
1160 break;
1161 case EV_HPD_UNPLUG_INT:
1162 dp_hpd_unplug_handle(dp_priv, todo->data);
1163 break;
1164 case EV_IRQ_HPD_INT:
1165 dp_irq_hpd_handle(dp_priv, todo->data);
1166 break;
1167 case EV_USER_NOTIFICATION:
1168 dp_display_send_hpd_notification(dp_priv,
1169 todo->data);
1170 break;
1171 default:
1172 break;
1173 }
1174 }
1175
1176 return 0;
1177}
1178
1179static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv)
1180{
1181 /* set event q to empty */
1182 dp_priv->event_gndx = 0;
1183 dp_priv->event_pndx = 0;
1184
1185 dp_priv->ev_tsk = kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1186 if (IS_ERR(dp_priv->ev_tsk))
1187 return PTR_ERR(dp_priv->ev_tsk);
1188
1189 return 0;
1190}
1191
1192static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1193{
1194 struct dp_display_private *dp = dev_id;
1195 irqreturn_t ret = IRQ_HANDLED;
1196 u32 hpd_isr_status;
1197
1198 if (!dp) {
1199 DRM_ERROR("invalid data\n");
1200 return IRQ_NONE;
1201 }
1202
1203 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1204
1205 if (hpd_isr_status & 0x0F) {
1206 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
1207 dp->dp_display.connector_type, hpd_isr_status);
1208 /* hpd related interrupts */
1209 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1210 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1211
1212 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1213 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1214 }
1215
1216 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1217 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1218 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1219 }
1220
1221 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1222 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1223 }
1224
1225 /* DP controller isr */
1226 dp_ctrl_isr(dp->ctrl);
1227
1228 /* DP aux isr */
1229 dp_aux_isr(dp->aux);
1230
1231 return ret;
1232}
1233
1234int dp_display_request_irq(struct msm_dp *dp_display)
1235{
1236 int rc = 0;
1237 struct dp_display_private *dp;
1238
1239 if (!dp_display) {
1240 DRM_ERROR("invalid input\n");
1241 return -EINVAL;
1242 }
1243
1244 dp = container_of(dp_display, struct dp_display_private, dp_display);
1245
1246 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1247 if (!dp->irq) {
1248 DRM_ERROR("failed to get irq\n");
1249 return -EINVAL;
1250 }
1251
1252 rc = devm_request_irq(dp_display->drm_dev->dev, dp->irq,
1253 dp_display_irq_handler,
1254 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1255 if (rc < 0) {
1256 DRM_ERROR("failed to request IRQ%u: %d\n",
1257 dp->irq, rc);
1258 return rc;
1259 }
1260 disable_irq(dp->irq);
1261
1262 return 0;
1263}
1264
1265static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev,
1266 unsigned int *id)
1267{
1268 const struct msm_dp_config *cfg = of_device_get_match_data(&pdev->dev);
1269 struct resource *res;
1270 int i;
1271
1272 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1273 if (!res)
1274 return NULL;
1275
1276 for (i = 0; i < cfg->num_descs; i++) {
1277 if (cfg->descs[i].io_start == res->start) {
1278 *id = i;
1279 return &cfg->descs[i];
1280 }
1281 }
1282
1283 dev_err(&pdev->dev, "unknown displayport instance\n");
1284 return NULL;
1285}
1286
1287static int dp_display_probe(struct platform_device *pdev)
1288{
1289 int rc = 0;
1290 struct dp_display_private *dp;
1291 const struct msm_dp_desc *desc;
1292
1293 if (!pdev || !pdev->dev.of_node) {
1294 DRM_ERROR("pdev not found\n");
1295 return -ENODEV;
1296 }
1297
1298 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1299 if (!dp)
1300 return -ENOMEM;
1301
1302 desc = dp_display_get_desc(pdev, &dp->id);
1303 if (!desc)
1304 return -EINVAL;
1305
1306 dp->pdev = pdev;
1307 dp->name = "drm_dp";
1308 dp->dp_display.connector_type = desc->connector_type;
1309 dp->wide_bus_en = desc->wide_bus_en;
1310 dp->dp_display.is_edp =
1311 (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
1312
1313 rc = dp_init_sub_modules(dp);
1314 if (rc) {
1315 DRM_ERROR("init sub module failed\n");
1316 return -EPROBE_DEFER;
1317 }
1318
1319 /* setup event q */
1320 mutex_init(&dp->event_mutex);
1321 init_waitqueue_head(&dp->event_q);
1322 spin_lock_init(&dp->event_lock);
1323
1324 /* Store DP audio handle inside DP display */
1325 dp->dp_display.dp_audio = dp->audio;
1326
1327 init_completion(&dp->audio_comp);
1328
1329 platform_set_drvdata(pdev, &dp->dp_display);
1330
1331 rc = component_add(&pdev->dev, &dp_display_comp_ops);
1332 if (rc) {
1333 DRM_ERROR("component add failed, rc=%d\n", rc);
1334 dp_display_deinit_sub_modules(dp);
1335 }
1336
1337 return rc;
1338}
1339
1340static int dp_display_remove(struct platform_device *pdev)
1341{
1342 struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
1343
1344 dp_display_deinit_sub_modules(dp);
1345
1346 component_del(&pdev->dev, &dp_display_comp_ops);
1347 platform_set_drvdata(pdev, NULL);
1348
1349 return 0;
1350}
1351
1352static int dp_pm_resume(struct device *dev)
1353{
1354 struct platform_device *pdev = to_platform_device(dev);
1355 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1356 struct dp_display_private *dp;
1357 int sink_count = 0;
1358
1359 dp = container_of(dp_display, struct dp_display_private, dp_display);
1360
1361 mutex_lock(&dp->event_mutex);
1362
1363 drm_dbg_dp(dp->drm_dev,
1364 "Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
1365 dp->dp_display.connector_type, dp->core_initialized,
1366 dp->phy_initialized, dp_display->power_on);
1367
1368 /* start from disconnected state */
1369 dp->hpd_state = ST_DISCONNECTED;
1370
1371 /* turn on dp ctrl/phy */
1372 dp_display_host_init(dp);
1373
1374 dp_catalog_ctrl_hpd_config(dp->catalog);
1375
1376
1377 if (!dp->dp_display.is_edp)
1378 dp_catalog_hpd_config_intr(dp->catalog,
1379 DP_DP_HPD_PLUG_INT_MASK |
1380 DP_DP_HPD_UNPLUG_INT_MASK,
1381 true);
1382
1383 if (dp_catalog_link_is_connected(dp->catalog)) {
1384 /*
1385 * set sink to normal operation mode -- D0
1386 * before dpcd read
1387 */
1388 dp_display_host_phy_init(dp);
1389 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
1390 sink_count = drm_dp_read_sink_count(dp->aux);
1391 if (sink_count < 0)
1392 sink_count = 0;
1393
1394 dp_display_host_phy_exit(dp);
1395 }
1396
1397 dp->link->sink_count = sink_count;
1398 /*
1399 * can not declared display is connected unless
1400 * HDMI cable is plugged in and sink_count of
1401 * dongle become 1
1402 * also only signal audio when disconnected
1403 */
1404 if (dp->link->sink_count) {
1405 dp->dp_display.is_connected = true;
1406 } else {
1407 dp->dp_display.is_connected = false;
1408 dp_display_handle_plugged_change(dp_display, false);
1409 }
1410
1411 drm_dbg_dp(dp->drm_dev,
1412 "After, type=%d sink=%d conn=%d core_init=%d phy_init=%d power=%d\n",
1413 dp->dp_display.connector_type, dp->link->sink_count,
1414 dp->dp_display.is_connected, dp->core_initialized,
1415 dp->phy_initialized, dp_display->power_on);
1416
1417 mutex_unlock(&dp->event_mutex);
1418
1419 return 0;
1420}
1421
1422static int dp_pm_suspend(struct device *dev)
1423{
1424 struct platform_device *pdev = to_platform_device(dev);
1425 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1426 struct dp_display_private *dp;
1427
1428 dp = container_of(dp_display, struct dp_display_private, dp_display);
1429
1430 mutex_lock(&dp->event_mutex);
1431
1432 drm_dbg_dp(dp->drm_dev,
1433 "Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
1434 dp->dp_display.connector_type, dp->core_initialized,
1435 dp->phy_initialized, dp_display->power_on);
1436
1437 /* mainlink enabled */
1438 if (dp_power_clk_status(dp->power, DP_CTRL_PM))
1439 dp_ctrl_off_link_stream(dp->ctrl);
1440
1441 dp_display_host_phy_exit(dp);
1442
1443 /* host_init will be called at pm_resume */
1444 dp_display_host_deinit(dp);
1445
1446 dp->hpd_state = ST_SUSPENDED;
1447
1448 drm_dbg_dp(dp->drm_dev,
1449 "After, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
1450 dp->dp_display.connector_type, dp->core_initialized,
1451 dp->phy_initialized, dp_display->power_on);
1452
1453 mutex_unlock(&dp->event_mutex);
1454
1455 return 0;
1456}
1457
1458static const struct dev_pm_ops dp_pm_ops = {
1459 .suspend = dp_pm_suspend,
1460 .resume = dp_pm_resume,
1461};
1462
1463static struct platform_driver dp_display_driver = {
1464 .probe = dp_display_probe,
1465 .remove = dp_display_remove,
1466 .driver = {
1467 .name = "msm-dp-display",
1468 .of_match_table = dp_dt_match,
1469 .suppress_bind_attrs = true,
1470 .pm = &dp_pm_ops,
1471 },
1472};
1473
1474int __init msm_dp_register(void)
1475{
1476 int ret;
1477
1478 ret = platform_driver_register(&dp_display_driver);
1479 if (ret)
1480 DRM_ERROR("Dp display driver register failed");
1481
1482 return ret;
1483}
1484
1485void __exit msm_dp_unregister(void)
1486{
1487 platform_driver_unregister(&dp_display_driver);
1488}
1489
1490void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1491{
1492 struct dp_display_private *dp;
1493
1494 if (!dp_display)
1495 return;
1496
1497 dp = container_of(dp_display, struct dp_display_private, dp_display);
1498
1499 if (!dp_display->is_edp)
1500 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1501}
1502
1503bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
1504{
1505 struct dp_display_private *dp;
1506
1507 dp = container_of(dp_display, struct dp_display_private, dp_display);
1508
1509 return dp->wide_bus_en;
1510}
1511
1512void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1513{
1514 struct dp_display_private *dp;
1515 struct device *dev;
1516 int rc;
1517
1518 dp = container_of(dp_display, struct dp_display_private, dp_display);
1519 dev = &dp->pdev->dev;
1520
1521 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1522 dp->link, dp->dp_display.connector,
1523 minor);
1524 if (IS_ERR(dp->debug)) {
1525 rc = PTR_ERR(dp->debug);
1526 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1527 dp->debug = NULL;
1528 }
1529}
1530
1531static void of_dp_aux_depopulate_bus_void(void *data)
1532{
1533 of_dp_aux_depopulate_bus(data);
1534}
1535
1536static int dp_display_get_next_bridge(struct msm_dp *dp)
1537{
1538 int rc;
1539 struct dp_display_private *dp_priv;
1540 struct device_node *aux_bus;
1541 struct device *dev;
1542
1543 dp_priv = container_of(dp, struct dp_display_private, dp_display);
1544 dev = &dp_priv->pdev->dev;
1545 aux_bus = of_get_child_by_name(dev->of_node, "aux-bus");
1546
1547 if (aux_bus && dp->is_edp) {
1548 dp_display_host_init(dp_priv);
1549 dp_catalog_ctrl_hpd_config(dp_priv->catalog);
1550 dp_display_host_phy_init(dp_priv);
1551 enable_irq(dp_priv->irq);
1552
1553 /*
1554 * The code below assumes that the panel will finish probing
1555 * by the time devm_of_dp_aux_populate_ep_devices() returns.
1556 * This isn't a great assumption since it will fail if the
1557 * panel driver is probed asynchronously but is the best we
1558 * can do without a bigger driver reorganization.
1559 */
1560 rc = of_dp_aux_populate_bus(dp_priv->aux, NULL);
1561 of_node_put(aux_bus);
1562 if (rc)
1563 goto error;
1564
1565 rc = devm_add_action_or_reset(dp->drm_dev->dev,
1566 of_dp_aux_depopulate_bus_void,
1567 dp_priv->aux);
1568 if (rc)
1569 goto error;
1570 } else if (dp->is_edp) {
1571 DRM_ERROR("eDP aux_bus not found\n");
1572 return -ENODEV;
1573 }
1574
1575 /*
1576 * External bridges are mandatory for eDP interfaces: one has to
1577 * provide at least an eDP panel (which gets wrapped into panel-bridge).
1578 *
1579 * For DisplayPort interfaces external bridges are optional, so
1580 * silently ignore an error if one is not present (-ENODEV).
1581 */
1582 rc = devm_dp_parser_find_next_bridge(dp->drm_dev->dev, dp_priv->parser);
1583 if (!dp->is_edp && rc == -ENODEV)
1584 return 0;
1585
1586 if (!rc) {
1587 dp->next_bridge = dp_priv->parser->next_bridge;
1588 return 0;
1589 }
1590
1591error:
1592 if (dp->is_edp) {
1593 disable_irq(dp_priv->irq);
1594 dp_display_host_phy_exit(dp_priv);
1595 dp_display_host_deinit(dp_priv);
1596 }
1597 return rc;
1598}
1599
1600int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1601 struct drm_encoder *encoder)
1602{
1603 struct msm_drm_private *priv = dev->dev_private;
1604 struct dp_display_private *dp_priv;
1605 int ret;
1606
1607 dp_display->drm_dev = dev;
1608
1609 dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
1610
1611 ret = dp_display_request_irq(dp_display);
1612 if (ret) {
1613 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1614 return ret;
1615 }
1616
1617 ret = dp_display_get_next_bridge(dp_display);
1618 if (ret)
1619 return ret;
1620
1621 dp_display->bridge = dp_bridge_init(dp_display, dev, encoder);
1622 if (IS_ERR(dp_display->bridge)) {
1623 ret = PTR_ERR(dp_display->bridge);
1624 DRM_DEV_ERROR(dev->dev,
1625 "failed to create dp bridge: %d\n", ret);
1626 dp_display->bridge = NULL;
1627 return ret;
1628 }
1629
1630 priv->bridges[priv->num_bridges++] = dp_display->bridge;
1631
1632 dp_display->connector = dp_drm_connector_init(dp_display, encoder);
1633 if (IS_ERR(dp_display->connector)) {
1634 ret = PTR_ERR(dp_display->connector);
1635 DRM_DEV_ERROR(dev->dev,
1636 "failed to create dp connector: %d\n", ret);
1637 dp_display->connector = NULL;
1638 return ret;
1639 }
1640
1641 dp_priv->panel->connector = dp_display->connector;
1642
1643 return 0;
1644}
1645
1646void dp_bridge_enable(struct drm_bridge *drm_bridge)
1647{
1648 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1649 struct msm_dp *dp = dp_bridge->dp_display;
1650 int rc = 0;
1651 struct dp_display_private *dp_display;
1652 u32 state;
1653 bool force_link_train = false;
1654
1655 dp_display = container_of(dp, struct dp_display_private, dp_display);
1656 if (!dp_display->dp_mode.drm_mode.clock) {
1657 DRM_ERROR("invalid params\n");
1658 return;
1659 }
1660
1661 if (dp->is_edp)
1662 dp_hpd_plug_handle(dp_display, 0);
1663
1664 mutex_lock(&dp_display->event_mutex);
1665
1666 state = dp_display->hpd_state;
1667 if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
1668 mutex_unlock(&dp_display->event_mutex);
1669 return;
1670 }
1671
1672 rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1673 if (rc) {
1674 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1675 mutex_unlock(&dp_display->event_mutex);
1676 return;
1677 }
1678
1679 state = dp_display->hpd_state;
1680
1681 if (state == ST_DISPLAY_OFF) {
1682 dp_display_host_phy_init(dp_display);
1683 force_link_train = true;
1684 }
1685
1686 dp_display_enable(dp_display, force_link_train);
1687
1688 rc = dp_display_post_enable(dp);
1689 if (rc) {
1690 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1691 dp_display_disable(dp_display);
1692 }
1693
1694 /* completed connection */
1695 dp_display->hpd_state = ST_CONNECTED;
1696
1697 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1698 mutex_unlock(&dp_display->event_mutex);
1699}
1700
1701void dp_bridge_disable(struct drm_bridge *drm_bridge)
1702{
1703 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1704 struct msm_dp *dp = dp_bridge->dp_display;
1705 struct dp_display_private *dp_display;
1706
1707 dp_display = container_of(dp, struct dp_display_private, dp_display);
1708
1709 dp_ctrl_push_idle(dp_display->ctrl);
1710}
1711
1712void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
1713{
1714 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1715 struct msm_dp *dp = dp_bridge->dp_display;
1716 u32 state;
1717 struct dp_display_private *dp_display;
1718
1719 dp_display = container_of(dp, struct dp_display_private, dp_display);
1720
1721 if (dp->is_edp)
1722 dp_hpd_unplug_handle(dp_display, 0);
1723
1724 mutex_lock(&dp_display->event_mutex);
1725
1726 state = dp_display->hpd_state;
1727 if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED) {
1728 mutex_unlock(&dp_display->event_mutex);
1729 return;
1730 }
1731
1732 dp_display_disable(dp_display);
1733
1734 state = dp_display->hpd_state;
1735 if (state == ST_DISCONNECT_PENDING) {
1736 /* completed disconnection */
1737 dp_display->hpd_state = ST_DISCONNECTED;
1738 } else {
1739 dp_display->hpd_state = ST_DISPLAY_OFF;
1740 }
1741
1742 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1743 mutex_unlock(&dp_display->event_mutex);
1744}
1745
1746void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
1747 const struct drm_display_mode *mode,
1748 const struct drm_display_mode *adjusted_mode)
1749{
1750 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1751 struct msm_dp *dp = dp_bridge->dp_display;
1752 struct dp_display_private *dp_display;
1753
1754 dp_display = container_of(dp, struct dp_display_private, dp_display);
1755
1756 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1757
1758 if (dp_display_check_video_test(dp))
1759 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1760 else /* Default num_components per pixel = 3 */
1761 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1762
1763 if (!dp_display->dp_mode.bpp)
1764 dp_display->dp_mode.bpp = 24; /* Default bpp */
1765
1766 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1767
1768 dp_display->dp_mode.v_active_low =
1769 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1770
1771 dp_display->dp_mode.h_active_low =
1772 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1773}