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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/phy/phy.h>
13#include <linux/delay.h>
14#include <drm/display/drm_dp_aux_bus.h>
15#include <drm/drm_edid.h>
16
17#include "msm_drv.h"
18#include "msm_kms.h"
19#include "dp_ctrl.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_display.h"
26#include "dp_drm.h"
27#include "dp_audio.h"
28#include "dp_debug.h"
29
30static bool psr_enabled = false;
31module_param(psr_enabled, bool, 0);
32MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays");
33
34#define HPD_STRING_SIZE 30
35
36enum {
37 ISR_DISCONNECTED,
38 ISR_CONNECT_PENDING,
39 ISR_CONNECTED,
40 ISR_HPD_REPLUG_COUNT,
41 ISR_IRQ_HPD_PULSE_COUNT,
42 ISR_HPD_LO_GLITH_COUNT,
43};
44
45/* event thread connection state */
46enum {
47 ST_DISCONNECTED,
48 ST_MAINLINK_READY,
49 ST_CONNECTED,
50 ST_DISCONNECT_PENDING,
51 ST_DISPLAY_OFF,
52};
53
54enum {
55 EV_NO_EVENT,
56 /* hpd events */
57 EV_HPD_PLUG_INT,
58 EV_IRQ_HPD_INT,
59 EV_HPD_UNPLUG_INT,
60 EV_USER_NOTIFICATION,
61};
62
63#define EVENT_TIMEOUT (HZ/10) /* 100ms */
64#define DP_EVENT_Q_MAX 8
65
66#define DP_TIMEOUT_NONE 0
67
68#define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
69
70struct msm_dp_event {
71 u32 event_id;
72 u32 data;
73 u32 delay;
74};
75
76struct msm_dp_display_private {
77 int irq;
78
79 unsigned int id;
80
81 /* state variables */
82 bool core_initialized;
83 bool phy_initialized;
84 bool audio_supported;
85
86 struct drm_device *drm_dev;
87
88 struct msm_dp_catalog *catalog;
89 struct drm_dp_aux *aux;
90 struct msm_dp_link *link;
91 struct msm_dp_panel *panel;
92 struct msm_dp_ctrl *ctrl;
93
94 struct msm_dp_display_mode msm_dp_mode;
95 struct msm_dp msm_dp_display;
96
97 /* wait for audio signaling */
98 struct completion audio_comp;
99
100 /* event related only access by event thread */
101 struct mutex event_mutex;
102 wait_queue_head_t event_q;
103 u32 hpd_state;
104 u32 event_pndx;
105 u32 event_gndx;
106 struct task_struct *ev_tsk;
107 struct msm_dp_event event_list[DP_EVENT_Q_MAX];
108 spinlock_t event_lock;
109
110 bool wide_bus_supported;
111
112 struct msm_dp_audio *audio;
113};
114
115struct msm_dp_desc {
116 phys_addr_t io_start;
117 unsigned int id;
118 bool wide_bus_supported;
119};
120
121static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
122 { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
123 { .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
124 { .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
125 { .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
126 {}
127};
128
129static const struct msm_dp_desc msm_dp_desc_sc7180[] = {
130 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
131 {}
132};
133
134static const struct msm_dp_desc msm_dp_desc_sc7280[] = {
135 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
136 { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
137 {}
138};
139
140static const struct msm_dp_desc msm_dp_desc_sc8180x[] = {
141 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
142 { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
143 { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
144 {}
145};
146
147static const struct msm_dp_desc msm_dp_desc_sc8280xp[] = {
148 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
149 { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
150 { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
151 { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
152 { .io_start = 0x22090000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
153 { .io_start = 0x22098000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
154 { .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
155 { .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
156 {}
157};
158
159static const struct msm_dp_desc msm_dp_desc_sm8650[] = {
160 { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
161 {}
162};
163
164static const struct msm_dp_desc msm_dp_desc_x1e80100[] = {
165 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
166 { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
167 { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
168 { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
169 {}
170};
171
172static const struct of_device_id msm_dp_dt_match[] = {
173 { .compatible = "qcom,sa8775p-dp", .data = &msm_dp_desc_sa8775p },
174 { .compatible = "qcom,sc7180-dp", .data = &msm_dp_desc_sc7180 },
175 { .compatible = "qcom,sc7280-dp", .data = &msm_dp_desc_sc7280 },
176 { .compatible = "qcom,sc7280-edp", .data = &msm_dp_desc_sc7280 },
177 { .compatible = "qcom,sc8180x-dp", .data = &msm_dp_desc_sc8180x },
178 { .compatible = "qcom,sc8180x-edp", .data = &msm_dp_desc_sc8180x },
179 { .compatible = "qcom,sc8280xp-dp", .data = &msm_dp_desc_sc8280xp },
180 { .compatible = "qcom,sc8280xp-edp", .data = &msm_dp_desc_sc8280xp },
181 { .compatible = "qcom,sdm845-dp", .data = &msm_dp_desc_sc7180 },
182 { .compatible = "qcom,sm8350-dp", .data = &msm_dp_desc_sc7180 },
183 { .compatible = "qcom,sm8650-dp", .data = &msm_dp_desc_sm8650 },
184 { .compatible = "qcom,x1e80100-dp", .data = &msm_dp_desc_x1e80100 },
185 {}
186};
187
188static struct msm_dp_display_private *dev_get_dp_display_private(struct device *dev)
189{
190 struct msm_dp *dp = dev_get_drvdata(dev);
191
192 return container_of(dp, struct msm_dp_display_private, msm_dp_display);
193}
194
195static int msm_dp_add_event(struct msm_dp_display_private *msm_dp_priv, u32 event,
196 u32 data, u32 delay)
197{
198 unsigned long flag;
199 struct msm_dp_event *todo;
200 int pndx;
201
202 spin_lock_irqsave(&msm_dp_priv->event_lock, flag);
203 pndx = msm_dp_priv->event_pndx + 1;
204 pndx %= DP_EVENT_Q_MAX;
205 if (pndx == msm_dp_priv->event_gndx) {
206 pr_err("event_q is full: pndx=%d gndx=%d\n",
207 msm_dp_priv->event_pndx, msm_dp_priv->event_gndx);
208 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
209 return -EPERM;
210 }
211 todo = &msm_dp_priv->event_list[msm_dp_priv->event_pndx++];
212 msm_dp_priv->event_pndx %= DP_EVENT_Q_MAX;
213 todo->event_id = event;
214 todo->data = data;
215 todo->delay = delay;
216 wake_up(&msm_dp_priv->event_q);
217 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
218
219 return 0;
220}
221
222static int msm_dp_del_event(struct msm_dp_display_private *msm_dp_priv, u32 event)
223{
224 unsigned long flag;
225 struct msm_dp_event *todo;
226 u32 gndx;
227
228 spin_lock_irqsave(&msm_dp_priv->event_lock, flag);
229 if (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) {
230 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
231 return -ENOENT;
232 }
233
234 gndx = msm_dp_priv->event_gndx;
235 while (msm_dp_priv->event_pndx != gndx) {
236 todo = &msm_dp_priv->event_list[gndx];
237 if (todo->event_id == event) {
238 todo->event_id = EV_NO_EVENT; /* deleted */
239 todo->delay = 0;
240 }
241 gndx++;
242 gndx %= DP_EVENT_Q_MAX;
243 }
244 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
245
246 return 0;
247}
248
249void msm_dp_display_signal_audio_start(struct msm_dp *msm_dp_display)
250{
251 struct msm_dp_display_private *dp;
252
253 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
254
255 reinit_completion(&dp->audio_comp);
256}
257
258void msm_dp_display_signal_audio_complete(struct msm_dp *msm_dp_display)
259{
260 struct msm_dp_display_private *dp;
261
262 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
263
264 complete_all(&dp->audio_comp);
265}
266
267static int msm_dp_hpd_event_thread_start(struct msm_dp_display_private *msm_dp_priv);
268
269static int msm_dp_display_bind(struct device *dev, struct device *master,
270 void *data)
271{
272 int rc = 0;
273 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
274 struct msm_drm_private *priv = dev_get_drvdata(master);
275 struct drm_device *drm = priv->dev;
276
277 dp->msm_dp_display.drm_dev = drm;
278 priv->dp[dp->id] = &dp->msm_dp_display;
279
280
281
282 dp->drm_dev = drm;
283 dp->aux->drm_dev = drm;
284 rc = msm_dp_aux_register(dp->aux);
285 if (rc) {
286 DRM_ERROR("DRM DP AUX register failed\n");
287 goto end;
288 }
289
290
291 rc = msm_dp_register_audio_driver(dev, dp->audio);
292 if (rc) {
293 DRM_ERROR("Audio registration Dp failed\n");
294 goto end;
295 }
296
297 rc = msm_dp_hpd_event_thread_start(dp);
298 if (rc) {
299 DRM_ERROR("Event thread create failed\n");
300 goto end;
301 }
302
303 return 0;
304end:
305 return rc;
306}
307
308static void msm_dp_display_unbind(struct device *dev, struct device *master,
309 void *data)
310{
311 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
312 struct msm_drm_private *priv = dev_get_drvdata(master);
313
314 kthread_stop(dp->ev_tsk);
315
316 of_dp_aux_depopulate_bus(dp->aux);
317
318 msm_dp_unregister_audio_driver(dev, dp->audio);
319 msm_dp_aux_unregister(dp->aux);
320 dp->drm_dev = NULL;
321 dp->aux->drm_dev = NULL;
322 priv->dp[dp->id] = NULL;
323}
324
325static const struct component_ops msm_dp_display_comp_ops = {
326 .bind = msm_dp_display_bind,
327 .unbind = msm_dp_display_unbind,
328};
329
330static void msm_dp_display_send_hpd_event(struct msm_dp *msm_dp_display)
331{
332 struct msm_dp_display_private *dp;
333 struct drm_connector *connector;
334
335 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
336
337 connector = dp->msm_dp_display.connector;
338 drm_helper_hpd_irq_event(connector->dev);
339}
340
341static int msm_dp_display_send_hpd_notification(struct msm_dp_display_private *dp,
342 bool hpd)
343{
344 if ((hpd && dp->msm_dp_display.link_ready) ||
345 (!hpd && !dp->msm_dp_display.link_ready)) {
346 drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
347 (hpd ? "on" : "off"));
348 return 0;
349 }
350
351 /* reset video pattern flag on disconnect */
352 if (!hpd) {
353 dp->panel->video_test = false;
354 if (!dp->msm_dp_display.is_edp)
355 drm_dp_set_subconnector_property(dp->msm_dp_display.connector,
356 connector_status_disconnected,
357 dp->panel->dpcd,
358 dp->panel->downstream_ports);
359 }
360
361 dp->msm_dp_display.link_ready = hpd;
362
363 drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
364 dp->msm_dp_display.connector_type, hpd);
365 msm_dp_display_send_hpd_event(&dp->msm_dp_display);
366
367 return 0;
368}
369
370static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp)
371{
372 struct drm_connector *connector = dp->msm_dp_display.connector;
373 const struct drm_display_info *info = &connector->display_info;
374 int rc = 0;
375
376 rc = msm_dp_panel_read_sink_caps(dp->panel, connector);
377 if (rc)
378 goto end;
379
380 msm_dp_link_process_request(dp->link);
381
382 if (!dp->msm_dp_display.is_edp)
383 drm_dp_set_subconnector_property(connector,
384 connector_status_connected,
385 dp->panel->dpcd,
386 dp->panel->downstream_ports);
387
388 dp->msm_dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
389
390 dp->audio_supported = info->has_audio;
391 msm_dp_panel_handle_sink_request(dp->panel);
392
393 /*
394 * set sink to normal operation mode -- D0
395 * before dpcd read
396 */
397 msm_dp_link_psm_config(dp->link, &dp->panel->link_info, false);
398
399 msm_dp_link_reset_phy_params_vx_px(dp->link);
400 rc = msm_dp_ctrl_on_link(dp->ctrl);
401 if (rc) {
402 DRM_ERROR("failed to complete DP link training\n");
403 goto end;
404 }
405
406 msm_dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
407
408end:
409 return rc;
410}
411
412static void msm_dp_display_host_phy_init(struct msm_dp_display_private *dp)
413{
414 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
415 dp->msm_dp_display.connector_type, dp->core_initialized,
416 dp->phy_initialized);
417
418 if (!dp->phy_initialized) {
419 msm_dp_ctrl_phy_init(dp->ctrl);
420 dp->phy_initialized = true;
421 }
422}
423
424static void msm_dp_display_host_phy_exit(struct msm_dp_display_private *dp)
425{
426 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
427 dp->msm_dp_display.connector_type, dp->core_initialized,
428 dp->phy_initialized);
429
430 if (dp->phy_initialized) {
431 msm_dp_ctrl_phy_exit(dp->ctrl);
432 dp->phy_initialized = false;
433 }
434}
435
436static void msm_dp_display_host_init(struct msm_dp_display_private *dp)
437{
438 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
439 dp->msm_dp_display.connector_type, dp->core_initialized,
440 dp->phy_initialized);
441
442 msm_dp_ctrl_core_clk_enable(dp->ctrl);
443 msm_dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
444 msm_dp_aux_init(dp->aux);
445 dp->core_initialized = true;
446}
447
448static void msm_dp_display_host_deinit(struct msm_dp_display_private *dp)
449{
450 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
451 dp->msm_dp_display.connector_type, dp->core_initialized,
452 dp->phy_initialized);
453
454 msm_dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
455 msm_dp_aux_deinit(dp->aux);
456 msm_dp_ctrl_core_clk_disable(dp->ctrl);
457 dp->core_initialized = false;
458}
459
460static int msm_dp_display_usbpd_configure_cb(struct device *dev)
461{
462 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
463
464 msm_dp_display_host_phy_init(dp);
465
466 return msm_dp_display_process_hpd_high(dp);
467}
468
469static int msm_dp_display_notify_disconnect(struct device *dev)
470{
471 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
472
473 msm_dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
474
475 return 0;
476}
477
478static void msm_dp_display_handle_video_request(struct msm_dp_display_private *dp)
479{
480 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
481 dp->panel->video_test = true;
482 msm_dp_link_send_test_response(dp->link);
483 }
484}
485
486static int msm_dp_display_handle_port_status_changed(struct msm_dp_display_private *dp)
487{
488 int rc = 0;
489
490 if (drm_dp_is_branch(dp->panel->dpcd) && dp->link->sink_count == 0) {
491 drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n");
492 if (dp->hpd_state != ST_DISCONNECTED) {
493 dp->hpd_state = ST_DISCONNECT_PENDING;
494 msm_dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
495 }
496 } else {
497 if (dp->hpd_state == ST_DISCONNECTED) {
498 dp->hpd_state = ST_MAINLINK_READY;
499 rc = msm_dp_display_process_hpd_high(dp);
500 if (rc)
501 dp->hpd_state = ST_DISCONNECTED;
502 }
503 }
504
505 return rc;
506}
507
508static int msm_dp_display_handle_irq_hpd(struct msm_dp_display_private *dp)
509{
510 u32 sink_request = dp->link->sink_request;
511
512 drm_dbg_dp(dp->drm_dev, "%d\n", sink_request);
513 if (dp->hpd_state == ST_DISCONNECTED) {
514 if (sink_request & DP_LINK_STATUS_UPDATED) {
515 drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n",
516 sink_request);
517 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
518 return -EINVAL;
519 }
520 }
521
522 msm_dp_ctrl_handle_sink_request(dp->ctrl);
523
524 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
525 msm_dp_display_handle_video_request(dp);
526
527 return 0;
528}
529
530static int msm_dp_display_usbpd_attention_cb(struct device *dev)
531{
532 int rc = 0;
533 u32 sink_request;
534 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
535
536 /* check for any test request issued by sink */
537 rc = msm_dp_link_process_request(dp->link);
538 if (!rc) {
539 sink_request = dp->link->sink_request;
540 drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n",
541 dp->hpd_state, sink_request);
542 if (sink_request & DS_PORT_STATUS_CHANGED)
543 rc = msm_dp_display_handle_port_status_changed(dp);
544 else
545 rc = msm_dp_display_handle_irq_hpd(dp);
546 }
547
548 return rc;
549}
550
551static int msm_dp_hpd_plug_handle(struct msm_dp_display_private *dp, u32 data)
552{
553 u32 state;
554 int ret;
555 struct platform_device *pdev = dp->msm_dp_display.pdev;
556
557 msm_dp_aux_enable_xfers(dp->aux, true);
558
559 mutex_lock(&dp->event_mutex);
560
561 state = dp->hpd_state;
562 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
563 dp->msm_dp_display.connector_type, state);
564
565 if (state == ST_DISPLAY_OFF) {
566 mutex_unlock(&dp->event_mutex);
567 return 0;
568 }
569
570 if (state == ST_MAINLINK_READY || state == ST_CONNECTED) {
571 mutex_unlock(&dp->event_mutex);
572 return 0;
573 }
574
575 if (state == ST_DISCONNECT_PENDING) {
576 /* wait until ST_DISCONNECTED */
577 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
578 mutex_unlock(&dp->event_mutex);
579 return 0;
580 }
581
582 ret = pm_runtime_resume_and_get(&pdev->dev);
583 if (ret) {
584 DRM_ERROR("failed to pm_runtime_resume\n");
585 mutex_unlock(&dp->event_mutex);
586 return ret;
587 }
588
589 ret = msm_dp_display_usbpd_configure_cb(&pdev->dev);
590 if (ret) { /* link train failed */
591 dp->hpd_state = ST_DISCONNECTED;
592 pm_runtime_put_sync(&pdev->dev);
593 } else {
594 dp->hpd_state = ST_MAINLINK_READY;
595 }
596
597 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
598 dp->msm_dp_display.connector_type, state);
599 mutex_unlock(&dp->event_mutex);
600
601 /* uevent will complete connection part */
602 return 0;
603};
604
605static void msm_dp_display_handle_plugged_change(struct msm_dp *msm_dp_display,
606 bool plugged)
607{
608 struct msm_dp_display_private *dp;
609
610 dp = container_of(msm_dp_display,
611 struct msm_dp_display_private, msm_dp_display);
612
613 /* notify audio subsystem only if sink supports audio */
614 if (msm_dp_display->plugged_cb && msm_dp_display->codec_dev &&
615 dp->audio_supported)
616 msm_dp_display->plugged_cb(msm_dp_display->codec_dev, plugged);
617}
618
619static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data)
620{
621 u32 state;
622 struct platform_device *pdev = dp->msm_dp_display.pdev;
623
624 msm_dp_aux_enable_xfers(dp->aux, false);
625
626 mutex_lock(&dp->event_mutex);
627
628 state = dp->hpd_state;
629
630 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
631 dp->msm_dp_display.connector_type, state);
632
633 /* unplugged, no more irq_hpd handle */
634 msm_dp_del_event(dp, EV_IRQ_HPD_INT);
635
636 if (state == ST_DISCONNECTED) {
637 /* triggered by irq_hdp with sink_count = 0 */
638 if (dp->link->sink_count == 0) {
639 msm_dp_display_host_phy_exit(dp);
640 }
641 msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
642 mutex_unlock(&dp->event_mutex);
643 return 0;
644 } else if (state == ST_DISCONNECT_PENDING) {
645 mutex_unlock(&dp->event_mutex);
646 return 0;
647 } else if (state == ST_MAINLINK_READY) {
648 msm_dp_ctrl_off_link(dp->ctrl);
649 msm_dp_display_host_phy_exit(dp);
650 dp->hpd_state = ST_DISCONNECTED;
651 msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
652 pm_runtime_put_sync(&pdev->dev);
653 mutex_unlock(&dp->event_mutex);
654 return 0;
655 }
656
657 /*
658 * We don't need separate work for disconnect as
659 * connect/attention interrupts are disabled
660 */
661 msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
662
663 if (state == ST_DISPLAY_OFF) {
664 dp->hpd_state = ST_DISCONNECTED;
665 } else {
666 dp->hpd_state = ST_DISCONNECT_PENDING;
667 }
668
669 /* signal the disconnect event early to ensure proper teardown */
670 msm_dp_display_handle_plugged_change(&dp->msm_dp_display, false);
671
672 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
673 dp->msm_dp_display.connector_type, state);
674
675 /* uevent will complete disconnection part */
676 pm_runtime_put_sync(&pdev->dev);
677 mutex_unlock(&dp->event_mutex);
678 return 0;
679}
680
681static int msm_dp_irq_hpd_handle(struct msm_dp_display_private *dp, u32 data)
682{
683 u32 state;
684
685 mutex_lock(&dp->event_mutex);
686
687 /* irq_hpd can happen at either connected or disconnected state */
688 state = dp->hpd_state;
689 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
690 dp->msm_dp_display.connector_type, state);
691
692 if (state == ST_DISPLAY_OFF) {
693 mutex_unlock(&dp->event_mutex);
694 return 0;
695 }
696
697 if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
698 /* wait until ST_CONNECTED */
699 msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
700 mutex_unlock(&dp->event_mutex);
701 return 0;
702 }
703
704 msm_dp_display_usbpd_attention_cb(&dp->msm_dp_display.pdev->dev);
705
706 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
707 dp->msm_dp_display.connector_type, state);
708
709 mutex_unlock(&dp->event_mutex);
710
711 return 0;
712}
713
714static void msm_dp_display_deinit_sub_modules(struct msm_dp_display_private *dp)
715{
716 msm_dp_audio_put(dp->audio);
717 msm_dp_panel_put(dp->panel);
718 msm_dp_aux_put(dp->aux);
719}
720
721static int msm_dp_init_sub_modules(struct msm_dp_display_private *dp)
722{
723 int rc = 0;
724 struct device *dev = &dp->msm_dp_display.pdev->dev;
725 struct msm_dp_panel_in panel_in = {
726 .dev = dev,
727 };
728 struct phy *phy;
729
730 phy = devm_phy_get(dev, "dp");
731 if (IS_ERR(phy))
732 return PTR_ERR(phy);
733
734 rc = phy_set_mode_ext(phy, PHY_MODE_DP,
735 dp->msm_dp_display.is_edp ? PHY_SUBMODE_EDP : PHY_SUBMODE_DP);
736 if (rc) {
737 DRM_ERROR("failed to set phy submode, rc = %d\n", rc);
738 dp->catalog = NULL;
739 goto error;
740 }
741
742 dp->catalog = msm_dp_catalog_get(dev);
743 if (IS_ERR(dp->catalog)) {
744 rc = PTR_ERR(dp->catalog);
745 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
746 dp->catalog = NULL;
747 goto error;
748 }
749
750 dp->aux = msm_dp_aux_get(dev, dp->catalog,
751 phy,
752 dp->msm_dp_display.is_edp);
753 if (IS_ERR(dp->aux)) {
754 rc = PTR_ERR(dp->aux);
755 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
756 dp->aux = NULL;
757 goto error;
758 }
759
760 dp->link = msm_dp_link_get(dev, dp->aux);
761 if (IS_ERR(dp->link)) {
762 rc = PTR_ERR(dp->link);
763 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
764 dp->link = NULL;
765 goto error_link;
766 }
767
768 panel_in.aux = dp->aux;
769 panel_in.catalog = dp->catalog;
770 panel_in.link = dp->link;
771
772 dp->panel = msm_dp_panel_get(&panel_in);
773 if (IS_ERR(dp->panel)) {
774 rc = PTR_ERR(dp->panel);
775 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
776 dp->panel = NULL;
777 goto error_link;
778 }
779
780 dp->ctrl = msm_dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
781 dp->catalog,
782 phy);
783 if (IS_ERR(dp->ctrl)) {
784 rc = PTR_ERR(dp->ctrl);
785 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
786 dp->ctrl = NULL;
787 goto error_ctrl;
788 }
789
790 dp->audio = msm_dp_audio_get(dp->msm_dp_display.pdev, dp->panel, dp->catalog);
791 if (IS_ERR(dp->audio)) {
792 rc = PTR_ERR(dp->audio);
793 pr_err("failed to initialize audio, rc = %d\n", rc);
794 dp->audio = NULL;
795 goto error_ctrl;
796 }
797
798 return rc;
799
800error_ctrl:
801 msm_dp_panel_put(dp->panel);
802error_link:
803 msm_dp_aux_put(dp->aux);
804error:
805 return rc;
806}
807
808static int msm_dp_display_set_mode(struct msm_dp *msm_dp_display,
809 struct msm_dp_display_mode *mode)
810{
811 struct msm_dp_display_private *dp;
812
813 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
814
815 drm_mode_copy(&dp->panel->msm_dp_mode.drm_mode, &mode->drm_mode);
816 dp->panel->msm_dp_mode.bpp = mode->bpp;
817 dp->panel->msm_dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420;
818 msm_dp_panel_init_panel_info(dp->panel);
819 return 0;
820}
821
822static int msm_dp_display_enable(struct msm_dp_display_private *dp, bool force_link_train)
823{
824 int rc = 0;
825 struct msm_dp *msm_dp_display = &dp->msm_dp_display;
826
827 drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
828 if (msm_dp_display->power_on) {
829 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
830 return 0;
831 }
832
833 rc = msm_dp_ctrl_on_stream(dp->ctrl, force_link_train);
834 if (!rc)
835 msm_dp_display->power_on = true;
836
837 return rc;
838}
839
840static int msm_dp_display_post_enable(struct msm_dp *msm_dp_display)
841{
842 struct msm_dp_display_private *dp;
843 u32 rate;
844
845 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
846
847 rate = dp->link->link_params.rate;
848
849 if (dp->audio_supported) {
850 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
851 dp->audio->lane_count = dp->link->link_params.num_lanes;
852 }
853
854 /* signal the connect event late to synchronize video and display */
855 msm_dp_display_handle_plugged_change(msm_dp_display, true);
856
857 if (msm_dp_display->psr_supported)
858 msm_dp_ctrl_config_psr(dp->ctrl);
859
860 return 0;
861}
862
863static int msm_dp_display_disable(struct msm_dp_display_private *dp)
864{
865 struct msm_dp *msm_dp_display = &dp->msm_dp_display;
866
867 if (!msm_dp_display->power_on)
868 return 0;
869
870 /* wait only if audio was enabled */
871 if (msm_dp_display->audio_enabled) {
872 /* signal the disconnect event */
873 msm_dp_display_handle_plugged_change(msm_dp_display, false);
874 if (!wait_for_completion_timeout(&dp->audio_comp,
875 HZ * 5))
876 DRM_ERROR("audio comp timeout\n");
877 }
878
879 msm_dp_display->audio_enabled = false;
880
881 if (dp->link->sink_count == 0) {
882 /*
883 * irq_hpd with sink_count = 0
884 * hdmi unplugged out of dongle
885 */
886 msm_dp_ctrl_off_link_stream(dp->ctrl);
887 } else {
888 /*
889 * unplugged interrupt
890 * dongle unplugged out of DUT
891 */
892 msm_dp_ctrl_off(dp->ctrl);
893 msm_dp_display_host_phy_exit(dp);
894 }
895
896 msm_dp_display->power_on = false;
897
898 drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
899 return 0;
900}
901
902int msm_dp_display_set_plugged_cb(struct msm_dp *msm_dp_display,
903 hdmi_codec_plugged_cb fn, struct device *codec_dev)
904{
905 bool plugged;
906
907 msm_dp_display->plugged_cb = fn;
908 msm_dp_display->codec_dev = codec_dev;
909 plugged = msm_dp_display->link_ready;
910 msm_dp_display_handle_plugged_change(msm_dp_display, plugged);
911
912 return 0;
913}
914
915/**
916 * msm_dp_bridge_mode_valid - callback to determine if specified mode is valid
917 * @bridge: Pointer to drm bridge structure
918 * @info: display info
919 * @mode: Pointer to drm mode structure
920 * Returns: Validity status for specified mode
921 */
922enum drm_mode_status msm_dp_bridge_mode_valid(struct drm_bridge *bridge,
923 const struct drm_display_info *info,
924 const struct drm_display_mode *mode)
925{
926 const u32 num_components = 3, default_bpp = 24;
927 struct msm_dp_display_private *msm_dp_display;
928 struct msm_dp_link_info *link_info;
929 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
930 struct msm_dp *dp;
931 int mode_pclk_khz = mode->clock;
932
933 dp = to_dp_bridge(bridge)->msm_dp_display;
934
935 if (!dp || !mode_pclk_khz || !dp->connector) {
936 DRM_ERROR("invalid params\n");
937 return -EINVAL;
938 }
939
940 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
941 link_info = &msm_dp_display->panel->link_info;
942
943 if ((drm_mode_is_420_only(&dp->connector->display_info, mode) &&
944 msm_dp_display->panel->vsc_sdp_supported) ||
945 msm_dp_wide_bus_available(dp))
946 mode_pclk_khz /= 2;
947
948 if (mode_pclk_khz > DP_MAX_PIXEL_CLK_KHZ)
949 return MODE_CLOCK_HIGH;
950
951 mode_bpp = dp->connector->display_info.bpc * num_components;
952 if (!mode_bpp)
953 mode_bpp = default_bpp;
954
955 mode_bpp = msm_dp_panel_get_mode_bpp(msm_dp_display->panel,
956 mode_bpp, mode_pclk_khz);
957
958 mode_rate_khz = mode_pclk_khz * mode_bpp;
959 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
960
961 if (mode_rate_khz > supported_rate_khz)
962 return MODE_BAD;
963
964 return MODE_OK;
965}
966
967int msm_dp_display_get_modes(struct msm_dp *dp)
968{
969 struct msm_dp_display_private *msm_dp_display;
970
971 if (!dp) {
972 DRM_ERROR("invalid params\n");
973 return 0;
974 }
975
976 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
977
978 return msm_dp_panel_get_modes(msm_dp_display->panel,
979 dp->connector);
980}
981
982bool msm_dp_display_check_video_test(struct msm_dp *dp)
983{
984 struct msm_dp_display_private *msm_dp_display;
985
986 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
987
988 return msm_dp_display->panel->video_test;
989}
990
991int msm_dp_display_get_test_bpp(struct msm_dp *dp)
992{
993 struct msm_dp_display_private *msm_dp_display;
994
995 if (!dp) {
996 DRM_ERROR("invalid params\n");
997 return 0;
998 }
999
1000 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1001
1002 return msm_dp_link_bit_depth_to_bpp(
1003 msm_dp_display->link->test_video.test_bit_depth);
1004}
1005
1006void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
1007{
1008 struct msm_dp_display_private *msm_dp_display;
1009
1010 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1011
1012 /*
1013 * if we are reading registers we need the link clocks to be on
1014 * however till DP cable is connected this will not happen as we
1015 * do not know the resolution to power up with. Hence check the
1016 * power_on status before dumping DP registers to avoid crash due
1017 * to unclocked access
1018 */
1019 mutex_lock(&msm_dp_display->event_mutex);
1020
1021 if (!dp->power_on) {
1022 mutex_unlock(&msm_dp_display->event_mutex);
1023 return;
1024 }
1025
1026 msm_dp_catalog_snapshot(msm_dp_display->catalog, disp_state);
1027
1028 mutex_unlock(&msm_dp_display->event_mutex);
1029}
1030
1031void msm_dp_display_set_psr(struct msm_dp *msm_dp_display, bool enter)
1032{
1033 struct msm_dp_display_private *dp;
1034
1035 if (!msm_dp_display) {
1036 DRM_ERROR("invalid params\n");
1037 return;
1038 }
1039
1040 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1041 msm_dp_ctrl_set_psr(dp->ctrl, enter);
1042}
1043
1044static int hpd_event_thread(void *data)
1045{
1046 struct msm_dp_display_private *msm_dp_priv;
1047 unsigned long flag;
1048 struct msm_dp_event *todo;
1049 int timeout_mode = 0;
1050
1051 msm_dp_priv = (struct msm_dp_display_private *)data;
1052
1053 while (1) {
1054 if (timeout_mode) {
1055 wait_event_timeout(msm_dp_priv->event_q,
1056 (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) ||
1057 kthread_should_stop(), EVENT_TIMEOUT);
1058 } else {
1059 wait_event_interruptible(msm_dp_priv->event_q,
1060 (msm_dp_priv->event_pndx != msm_dp_priv->event_gndx) ||
1061 kthread_should_stop());
1062 }
1063
1064 if (kthread_should_stop())
1065 break;
1066
1067 spin_lock_irqsave(&msm_dp_priv->event_lock, flag);
1068 todo = &msm_dp_priv->event_list[msm_dp_priv->event_gndx];
1069 if (todo->delay) {
1070 struct msm_dp_event *todo_next;
1071
1072 msm_dp_priv->event_gndx++;
1073 msm_dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1074
1075 /* re enter delay event into q */
1076 todo_next = &msm_dp_priv->event_list[msm_dp_priv->event_pndx++];
1077 msm_dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1078 todo_next->event_id = todo->event_id;
1079 todo_next->data = todo->data;
1080 todo_next->delay = todo->delay - 1;
1081
1082 /* clean up older event */
1083 todo->event_id = EV_NO_EVENT;
1084 todo->delay = 0;
1085
1086 /* switch to timeout mode */
1087 timeout_mode = 1;
1088 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
1089 continue;
1090 }
1091
1092 /* timeout with no events in q */
1093 if (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) {
1094 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
1095 continue;
1096 }
1097
1098 msm_dp_priv->event_gndx++;
1099 msm_dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1100 timeout_mode = 0;
1101 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
1102
1103 switch (todo->event_id) {
1104 case EV_HPD_PLUG_INT:
1105 msm_dp_hpd_plug_handle(msm_dp_priv, todo->data);
1106 break;
1107 case EV_HPD_UNPLUG_INT:
1108 msm_dp_hpd_unplug_handle(msm_dp_priv, todo->data);
1109 break;
1110 case EV_IRQ_HPD_INT:
1111 msm_dp_irq_hpd_handle(msm_dp_priv, todo->data);
1112 break;
1113 case EV_USER_NOTIFICATION:
1114 msm_dp_display_send_hpd_notification(msm_dp_priv,
1115 todo->data);
1116 break;
1117 default:
1118 break;
1119 }
1120 }
1121
1122 return 0;
1123}
1124
1125static int msm_dp_hpd_event_thread_start(struct msm_dp_display_private *msm_dp_priv)
1126{
1127 /* set event q to empty */
1128 msm_dp_priv->event_gndx = 0;
1129 msm_dp_priv->event_pndx = 0;
1130
1131 msm_dp_priv->ev_tsk = kthread_run(hpd_event_thread, msm_dp_priv, "dp_hpd_handler");
1132 if (IS_ERR(msm_dp_priv->ev_tsk))
1133 return PTR_ERR(msm_dp_priv->ev_tsk);
1134
1135 return 0;
1136}
1137
1138static irqreturn_t msm_dp_display_irq_handler(int irq, void *dev_id)
1139{
1140 struct msm_dp_display_private *dp = dev_id;
1141 irqreturn_t ret = IRQ_NONE;
1142 u32 hpd_isr_status;
1143
1144 if (!dp) {
1145 DRM_ERROR("invalid data\n");
1146 return IRQ_NONE;
1147 }
1148
1149 hpd_isr_status = msm_dp_catalog_hpd_get_intr_status(dp->catalog);
1150
1151 if (hpd_isr_status & 0x0F) {
1152 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
1153 dp->msm_dp_display.connector_type, hpd_isr_status);
1154 /* hpd related interrupts */
1155 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1156 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1157
1158 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1159 msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1160 }
1161
1162 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1163 msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1164 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1165 }
1166
1167 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1168 msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1169
1170 ret = IRQ_HANDLED;
1171 }
1172
1173 /* DP controller isr */
1174 ret |= msm_dp_ctrl_isr(dp->ctrl);
1175
1176 /* DP aux isr */
1177 ret |= msm_dp_aux_isr(dp->aux);
1178
1179 return ret;
1180}
1181
1182static int msm_dp_display_request_irq(struct msm_dp_display_private *dp)
1183{
1184 int rc = 0;
1185 struct platform_device *pdev = dp->msm_dp_display.pdev;
1186
1187 dp->irq = platform_get_irq(pdev, 0);
1188 if (dp->irq < 0) {
1189 DRM_ERROR("failed to get irq\n");
1190 return dp->irq;
1191 }
1192
1193 rc = devm_request_irq(&pdev->dev, dp->irq, msm_dp_display_irq_handler,
1194 IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN,
1195 "dp_display_isr", dp);
1196
1197 if (rc < 0) {
1198 DRM_ERROR("failed to request IRQ%u: %d\n",
1199 dp->irq, rc);
1200 return rc;
1201 }
1202
1203 return 0;
1204}
1205
1206static const struct msm_dp_desc *msm_dp_display_get_desc(struct platform_device *pdev)
1207{
1208 const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
1209 struct resource *res;
1210 int i;
1211
1212 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1213 if (!res)
1214 return NULL;
1215
1216 for (i = 0; i < descs[i].io_start; i++) {
1217 if (descs[i].io_start == res->start)
1218 return &descs[i];
1219 }
1220
1221 dev_err(&pdev->dev, "unknown displayport instance\n");
1222 return NULL;
1223}
1224
1225static int msm_dp_display_probe_tail(struct device *dev)
1226{
1227 struct msm_dp *dp = dev_get_drvdata(dev);
1228 int ret;
1229
1230 /*
1231 * External bridges are mandatory for eDP interfaces: one has to
1232 * provide at least an eDP panel (which gets wrapped into panel-bridge).
1233 *
1234 * For DisplayPort interfaces external bridges are optional, so
1235 * silently ignore an error if one is not present (-ENODEV).
1236 */
1237 dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
1238 if (IS_ERR(dp->next_bridge)) {
1239 ret = PTR_ERR(dp->next_bridge);
1240 dp->next_bridge = NULL;
1241 if (dp->is_edp || ret != -ENODEV)
1242 return ret;
1243 }
1244
1245 ret = component_add(dev, &msm_dp_display_comp_ops);
1246 if (ret)
1247 DRM_ERROR("component add failed, rc=%d\n", ret);
1248
1249 return ret;
1250}
1251
1252static int msm_dp_auxbus_done_probe(struct drm_dp_aux *aux)
1253{
1254 return msm_dp_display_probe_tail(aux->dev);
1255}
1256
1257static int msm_dp_display_get_connector_type(struct platform_device *pdev,
1258 const struct msm_dp_desc *desc)
1259{
1260 struct device_node *node = pdev->dev.of_node;
1261 struct device_node *aux_bus = of_get_child_by_name(node, "aux-bus");
1262 struct device_node *panel = of_get_child_by_name(aux_bus, "panel");
1263 int connector_type;
1264
1265 if (panel)
1266 connector_type = DRM_MODE_CONNECTOR_eDP;
1267 else
1268 connector_type = DRM_MODE_SUBCONNECTOR_DisplayPort;
1269
1270 of_node_put(panel);
1271 of_node_put(aux_bus);
1272
1273 return connector_type;
1274}
1275
1276static int msm_dp_display_probe(struct platform_device *pdev)
1277{
1278 int rc = 0;
1279 struct msm_dp_display_private *dp;
1280 const struct msm_dp_desc *desc;
1281
1282 if (!pdev || !pdev->dev.of_node) {
1283 DRM_ERROR("pdev not found\n");
1284 return -ENODEV;
1285 }
1286
1287 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1288 if (!dp)
1289 return -ENOMEM;
1290
1291 desc = msm_dp_display_get_desc(pdev);
1292 if (!desc)
1293 return -EINVAL;
1294
1295 dp->msm_dp_display.pdev = pdev;
1296 dp->id = desc->id;
1297 dp->msm_dp_display.connector_type = msm_dp_display_get_connector_type(pdev, desc);
1298 dp->wide_bus_supported = desc->wide_bus_supported;
1299 dp->msm_dp_display.is_edp =
1300 (dp->msm_dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
1301
1302 rc = msm_dp_init_sub_modules(dp);
1303 if (rc) {
1304 DRM_ERROR("init sub module failed\n");
1305 return -EPROBE_DEFER;
1306 }
1307
1308 /* setup event q */
1309 mutex_init(&dp->event_mutex);
1310 init_waitqueue_head(&dp->event_q);
1311 spin_lock_init(&dp->event_lock);
1312
1313 /* Store DP audio handle inside DP display */
1314 dp->msm_dp_display.msm_dp_audio = dp->audio;
1315
1316 init_completion(&dp->audio_comp);
1317
1318 platform_set_drvdata(pdev, &dp->msm_dp_display);
1319
1320 rc = devm_pm_runtime_enable(&pdev->dev);
1321 if (rc)
1322 goto err;
1323
1324 rc = msm_dp_display_request_irq(dp);
1325 if (rc)
1326 goto err;
1327
1328 if (dp->msm_dp_display.is_edp) {
1329 rc = devm_of_dp_aux_populate_bus(dp->aux, msm_dp_auxbus_done_probe);
1330 if (rc) {
1331 DRM_ERROR("eDP auxbus population failed, rc=%d\n", rc);
1332 goto err;
1333 }
1334 } else {
1335 rc = msm_dp_display_probe_tail(&pdev->dev);
1336 if (rc)
1337 goto err;
1338 }
1339
1340 return rc;
1341
1342err:
1343 msm_dp_display_deinit_sub_modules(dp);
1344 return rc;
1345}
1346
1347static void msm_dp_display_remove(struct platform_device *pdev)
1348{
1349 struct msm_dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
1350
1351 component_del(&pdev->dev, &msm_dp_display_comp_ops);
1352 msm_dp_display_deinit_sub_modules(dp);
1353 platform_set_drvdata(pdev, NULL);
1354}
1355
1356static int msm_dp_pm_runtime_suspend(struct device *dev)
1357{
1358 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
1359
1360 disable_irq(dp->irq);
1361
1362 if (dp->msm_dp_display.is_edp) {
1363 msm_dp_display_host_phy_exit(dp);
1364 msm_dp_catalog_ctrl_hpd_disable(dp->catalog);
1365 }
1366 msm_dp_display_host_deinit(dp);
1367
1368 return 0;
1369}
1370
1371static int msm_dp_pm_runtime_resume(struct device *dev)
1372{
1373 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
1374
1375 /*
1376 * for eDP, host cotroller, HPD block and PHY are enabled here
1377 * but with HPD irq disabled
1378 *
1379 * for DP, only host controller is enabled here.
1380 * HPD block is enabled at msm_dp_bridge_hpd_enable()
1381 * PHY will be enabled at plugin handler later
1382 */
1383 msm_dp_display_host_init(dp);
1384 if (dp->msm_dp_display.is_edp) {
1385 msm_dp_catalog_ctrl_hpd_enable(dp->catalog);
1386 msm_dp_display_host_phy_init(dp);
1387 }
1388
1389 enable_irq(dp->irq);
1390 return 0;
1391}
1392
1393static const struct dev_pm_ops msm_dp_pm_ops = {
1394 SET_RUNTIME_PM_OPS(msm_dp_pm_runtime_suspend, msm_dp_pm_runtime_resume, NULL)
1395 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1396 pm_runtime_force_resume)
1397};
1398
1399static struct platform_driver msm_dp_display_driver = {
1400 .probe = msm_dp_display_probe,
1401 .remove = msm_dp_display_remove,
1402 .driver = {
1403 .name = "msm-dp-display",
1404 .of_match_table = msm_dp_dt_match,
1405 .suppress_bind_attrs = true,
1406 .pm = &msm_dp_pm_ops,
1407 },
1408};
1409
1410int __init msm_dp_register(void)
1411{
1412 int ret;
1413
1414 ret = platform_driver_register(&msm_dp_display_driver);
1415 if (ret)
1416 DRM_ERROR("Dp display driver register failed");
1417
1418 return ret;
1419}
1420
1421void __exit msm_dp_unregister(void)
1422{
1423 platform_driver_unregister(&msm_dp_display_driver);
1424}
1425
1426bool msm_dp_is_yuv_420_enabled(const struct msm_dp *msm_dp_display,
1427 const struct drm_display_mode *mode)
1428{
1429 struct msm_dp_display_private *dp;
1430 const struct drm_display_info *info;
1431
1432 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1433 info = &msm_dp_display->connector->display_info;
1434
1435 return dp->panel->vsc_sdp_supported && drm_mode_is_420_only(info, mode);
1436}
1437
1438bool msm_dp_needs_periph_flush(const struct msm_dp *msm_dp_display,
1439 const struct drm_display_mode *mode)
1440{
1441 return msm_dp_is_yuv_420_enabled(msm_dp_display, mode);
1442}
1443
1444bool msm_dp_wide_bus_available(const struct msm_dp *msm_dp_display)
1445{
1446 struct msm_dp_display_private *dp;
1447
1448 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1449
1450 if (dp->msm_dp_mode.out_fmt_is_yuv_420)
1451 return false;
1452
1453 return dp->wide_bus_supported;
1454}
1455
1456void msm_dp_display_debugfs_init(struct msm_dp *msm_dp_display, struct dentry *root, bool is_edp)
1457{
1458 struct msm_dp_display_private *dp;
1459 struct device *dev;
1460 int rc;
1461
1462 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1463 dev = &dp->msm_dp_display.pdev->dev;
1464
1465 rc = msm_dp_debug_init(dev, dp->panel, dp->link, dp->msm_dp_display.connector, root, is_edp);
1466 if (rc)
1467 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1468}
1469
1470int msm_dp_modeset_init(struct msm_dp *msm_dp_display, struct drm_device *dev,
1471 struct drm_encoder *encoder, bool yuv_supported)
1472{
1473 struct msm_dp_display_private *msm_dp_priv;
1474 int ret;
1475
1476 msm_dp_display->drm_dev = dev;
1477
1478 msm_dp_priv = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1479
1480 ret = msm_dp_bridge_init(msm_dp_display, dev, encoder, yuv_supported);
1481 if (ret) {
1482 DRM_DEV_ERROR(dev->dev,
1483 "failed to create dp bridge: %d\n", ret);
1484 return ret;
1485 }
1486
1487 msm_dp_display->connector = msm_dp_drm_connector_init(msm_dp_display, encoder);
1488 if (IS_ERR(msm_dp_display->connector)) {
1489 ret = PTR_ERR(msm_dp_display->connector);
1490 DRM_DEV_ERROR(dev->dev,
1491 "failed to create dp connector: %d\n", ret);
1492 msm_dp_display->connector = NULL;
1493 return ret;
1494 }
1495
1496 msm_dp_priv->panel->connector = msm_dp_display->connector;
1497
1498 return 0;
1499}
1500
1501void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
1502 struct drm_bridge_state *old_bridge_state)
1503{
1504 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1505 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1506 int rc = 0;
1507 struct msm_dp_display_private *msm_dp_display;
1508 u32 state;
1509 bool force_link_train = false;
1510
1511 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1512 if (!msm_dp_display->msm_dp_mode.drm_mode.clock) {
1513 DRM_ERROR("invalid params\n");
1514 return;
1515 }
1516
1517 if (dp->is_edp)
1518 msm_dp_hpd_plug_handle(msm_dp_display, 0);
1519
1520 mutex_lock(&msm_dp_display->event_mutex);
1521 if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
1522 DRM_ERROR("failed to pm_runtime_resume\n");
1523 mutex_unlock(&msm_dp_display->event_mutex);
1524 return;
1525 }
1526
1527 state = msm_dp_display->hpd_state;
1528 if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
1529 mutex_unlock(&msm_dp_display->event_mutex);
1530 return;
1531 }
1532
1533 rc = msm_dp_display_set_mode(dp, &msm_dp_display->msm_dp_mode);
1534 if (rc) {
1535 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1536 mutex_unlock(&msm_dp_display->event_mutex);
1537 return;
1538 }
1539
1540 state = msm_dp_display->hpd_state;
1541
1542 if (state == ST_DISPLAY_OFF) {
1543 msm_dp_display_host_phy_init(msm_dp_display);
1544 force_link_train = true;
1545 }
1546
1547 msm_dp_display_enable(msm_dp_display, force_link_train);
1548
1549 rc = msm_dp_display_post_enable(dp);
1550 if (rc) {
1551 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1552 msm_dp_display_disable(msm_dp_display);
1553 }
1554
1555 /* completed connection */
1556 msm_dp_display->hpd_state = ST_CONNECTED;
1557
1558 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1559 mutex_unlock(&msm_dp_display->event_mutex);
1560}
1561
1562void msm_dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
1563 struct drm_bridge_state *old_bridge_state)
1564{
1565 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1566 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1567 struct msm_dp_display_private *msm_dp_display;
1568
1569 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1570
1571 msm_dp_ctrl_push_idle(msm_dp_display->ctrl);
1572}
1573
1574void msm_dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
1575 struct drm_bridge_state *old_bridge_state)
1576{
1577 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1578 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1579 u32 state;
1580 struct msm_dp_display_private *msm_dp_display;
1581
1582 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1583
1584 if (dp->is_edp)
1585 msm_dp_hpd_unplug_handle(msm_dp_display, 0);
1586
1587 mutex_lock(&msm_dp_display->event_mutex);
1588
1589 state = msm_dp_display->hpd_state;
1590 if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED)
1591 drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
1592 dp->connector_type, state);
1593
1594 msm_dp_display_disable(msm_dp_display);
1595
1596 state = msm_dp_display->hpd_state;
1597 if (state == ST_DISCONNECT_PENDING) {
1598 /* completed disconnection */
1599 msm_dp_display->hpd_state = ST_DISCONNECTED;
1600 } else {
1601 msm_dp_display->hpd_state = ST_DISPLAY_OFF;
1602 }
1603
1604 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1605
1606 pm_runtime_put_sync(&dp->pdev->dev);
1607 mutex_unlock(&msm_dp_display->event_mutex);
1608}
1609
1610void msm_dp_bridge_mode_set(struct drm_bridge *drm_bridge,
1611 const struct drm_display_mode *mode,
1612 const struct drm_display_mode *adjusted_mode)
1613{
1614 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1615 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1616 struct msm_dp_display_private *msm_dp_display;
1617 struct msm_dp_panel *msm_dp_panel;
1618
1619 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1620 msm_dp_panel = msm_dp_display->panel;
1621
1622 memset(&msm_dp_display->msm_dp_mode, 0x0, sizeof(struct msm_dp_display_mode));
1623
1624 if (msm_dp_display_check_video_test(dp))
1625 msm_dp_display->msm_dp_mode.bpp = msm_dp_display_get_test_bpp(dp);
1626 else /* Default num_components per pixel = 3 */
1627 msm_dp_display->msm_dp_mode.bpp = dp->connector->display_info.bpc * 3;
1628
1629 if (!msm_dp_display->msm_dp_mode.bpp)
1630 msm_dp_display->msm_dp_mode.bpp = 24; /* Default bpp */
1631
1632 drm_mode_copy(&msm_dp_display->msm_dp_mode.drm_mode, adjusted_mode);
1633
1634 msm_dp_display->msm_dp_mode.v_active_low =
1635 !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1636
1637 msm_dp_display->msm_dp_mode.h_active_low =
1638 !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1639
1640 msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 =
1641 drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) &&
1642 msm_dp_panel->vsc_sdp_supported;
1643
1644 /* populate wide_bus_support to different layers */
1645 msm_dp_display->ctrl->wide_bus_en =
1646 msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
1647 msm_dp_display->catalog->wide_bus_en =
1648 msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
1649}
1650
1651void msm_dp_bridge_hpd_enable(struct drm_bridge *bridge)
1652{
1653 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge);
1654 struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display;
1655 struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1656
1657 /*
1658 * this is for external DP with hpd irq enabled case,
1659 * step-1: msm_dp_pm_runtime_resume() enable dp host only
1660 * step-2: enable hdp block and have hpd irq enabled here
1661 * step-3: waiting for plugin irq while phy is not initialized
1662 * step-4: DP PHY is initialized at plugin handler before link training
1663 *
1664 */
1665 mutex_lock(&dp->event_mutex);
1666 if (pm_runtime_resume_and_get(&msm_dp_display->pdev->dev)) {
1667 DRM_ERROR("failed to resume power\n");
1668 mutex_unlock(&dp->event_mutex);
1669 return;
1670 }
1671
1672 msm_dp_catalog_ctrl_hpd_enable(dp->catalog);
1673
1674 /* enable HDP interrupts */
1675 msm_dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true);
1676
1677 msm_dp_display->internal_hpd = true;
1678 mutex_unlock(&dp->event_mutex);
1679}
1680
1681void msm_dp_bridge_hpd_disable(struct drm_bridge *bridge)
1682{
1683 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge);
1684 struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display;
1685 struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1686
1687 mutex_lock(&dp->event_mutex);
1688 /* disable HDP interrupts */
1689 msm_dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
1690 msm_dp_catalog_ctrl_hpd_disable(dp->catalog);
1691
1692 msm_dp_display->internal_hpd = false;
1693
1694 pm_runtime_put_sync(&msm_dp_display->pdev->dev);
1695 mutex_unlock(&dp->event_mutex);
1696}
1697
1698void msm_dp_bridge_hpd_notify(struct drm_bridge *bridge,
1699 enum drm_connector_status status)
1700{
1701 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge);
1702 struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display;
1703 struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1704
1705 /* Without next_bridge interrupts are handled by the DP core directly */
1706 if (msm_dp_display->internal_hpd)
1707 return;
1708
1709 if (!msm_dp_display->link_ready && status == connector_status_connected)
1710 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1711 else if (msm_dp_display->link_ready && status == connector_status_disconnected)
1712 msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1713}