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 <linux/string_choices.h>
15 #include <drm/display/drm_dp_aux_bus.h>
16 #include <drm/display/drm_hdmi_audio_helper.h>
17 #include <drm/drm_edid.h>
18
19 #include "msm_drv.h"
20 #include "msm_kms.h"
21 #include "dp_ctrl.h"
22 #include "dp_aux.h"
23 #include "dp_reg.h"
24 #include "dp_link.h"
25 #include "dp_panel.h"
26 #include "dp_display.h"
27 #include "dp_drm.h"
28 #include "dp_audio.h"
29 #include "dp_debug.h"
30
31 static bool psr_enabled = false;
32 module_param(psr_enabled, bool, 0);
33 MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays");
34
35 #define HPD_STRING_SIZE 30
36
37 enum {
38 ISR_DISCONNECTED,
39 ISR_CONNECT_PENDING,
40 ISR_CONNECTED,
41 ISR_HPD_REPLUG_COUNT,
42 ISR_IRQ_HPD_PULSE_COUNT,
43 ISR_HPD_LO_GLITH_COUNT,
44 };
45
46 /* event thread connection state */
47 enum {
48 ST_DISCONNECTED,
49 ST_MAINLINK_READY,
50 ST_CONNECTED,
51 ST_DISCONNECT_PENDING,
52 ST_DISPLAY_OFF,
53 };
54
55 enum {
56 EV_NO_EVENT,
57 /* hpd events */
58 EV_HPD_PLUG_INT,
59 EV_IRQ_HPD_INT,
60 EV_HPD_UNPLUG_INT,
61 EV_USER_NOTIFICATION,
62 };
63
64 #define EVENT_TIMEOUT (HZ/10) /* 100ms */
65 #define DP_EVENT_Q_MAX 8
66
67 #define DP_TIMEOUT_NONE 0
68
69 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
70
71 struct msm_dp_event {
72 u32 event_id;
73 u32 data;
74 u32 delay;
75 };
76
77 struct msm_dp_display_private {
78 int irq;
79
80 unsigned int id;
81
82 /* state variables */
83 bool core_initialized;
84 bool phy_initialized;
85 bool audio_supported;
86
87 struct drm_device *drm_dev;
88
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 void __iomem *ahb_base;
115 size_t ahb_len;
116
117 void __iomem *aux_base;
118 size_t aux_len;
119
120 void __iomem *link_base;
121 size_t link_len;
122
123 void __iomem *p0_base;
124 size_t p0_len;
125 };
126
127 struct msm_dp_desc {
128 phys_addr_t io_start;
129 unsigned int id;
130 bool wide_bus_supported;
131 };
132
133 static const struct msm_dp_desc msm_dp_desc_glymur[] = {
134 { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
135 { .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
136 { .io_start = 0x0af64000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
137 { .io_start = 0x0af6c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
138 {}
139 };
140
141 static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
142 { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
143 { .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
144 { .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
145 { .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
146 {}
147 };
148
149 static const struct msm_dp_desc msm_dp_desc_sdm845[] = {
150 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0 },
151 {}
152 };
153
154 static const struct msm_dp_desc msm_dp_desc_sc7180[] = {
155 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
156 {}
157 };
158
159 static const struct msm_dp_desc msm_dp_desc_sc7280[] = {
160 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
161 { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
162 {}
163 };
164
165 static const struct msm_dp_desc msm_dp_desc_sc8180x[] = {
166 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
167 { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
168 { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
169 {}
170 };
171
172 static const struct msm_dp_desc msm_dp_desc_sc8280xp[] = {
173 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
174 { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
175 { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
176 { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
177 { .io_start = 0x22090000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
178 { .io_start = 0x22098000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
179 { .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
180 { .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
181 {}
182 };
183
184 static const struct msm_dp_desc msm_dp_desc_sm8650[] = {
185 { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
186 {}
187 };
188
189 static const struct msm_dp_desc msm_dp_desc_x1e80100[] = {
190 { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
191 { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
192 { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
193 { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
194 {}
195 };
196
197 static const struct of_device_id msm_dp_dt_match[] = {
198 { .compatible = "qcom,glymur-dp", .data = &msm_dp_desc_glymur },
199 { .compatible = "qcom,sa8775p-dp", .data = &msm_dp_desc_sa8775p },
200 { .compatible = "qcom,sc7180-dp", .data = &msm_dp_desc_sc7180 },
201 { .compatible = "qcom,sc7280-dp", .data = &msm_dp_desc_sc7280 },
202 { .compatible = "qcom,sc7280-edp", .data = &msm_dp_desc_sc7280 },
203 { .compatible = "qcom,sc8180x-dp", .data = &msm_dp_desc_sc8180x },
204 { .compatible = "qcom,sc8180x-edp", .data = &msm_dp_desc_sc8180x },
205 { .compatible = "qcom,sc8280xp-dp", .data = &msm_dp_desc_sc8280xp },
206 { .compatible = "qcom,sc8280xp-edp", .data = &msm_dp_desc_sc8280xp },
207 { .compatible = "qcom,sdm845-dp", .data = &msm_dp_desc_sdm845 },
208 { .compatible = "qcom,sm8350-dp", .data = &msm_dp_desc_sc7180 },
209 { .compatible = "qcom,sm8650-dp", .data = &msm_dp_desc_sm8650 },
210 { .compatible = "qcom,x1e80100-dp", .data = &msm_dp_desc_x1e80100 },
211 {}
212 };
213
dev_get_dp_display_private(struct device * dev)214 static struct msm_dp_display_private *dev_get_dp_display_private(struct device *dev)
215 {
216 struct msm_dp *dp = dev_get_drvdata(dev);
217
218 return container_of(dp, struct msm_dp_display_private, msm_dp_display);
219 }
220
msm_dp_add_event(struct msm_dp_display_private * msm_dp_priv,u32 event,u32 data,u32 delay)221 static int msm_dp_add_event(struct msm_dp_display_private *msm_dp_priv, u32 event,
222 u32 data, u32 delay)
223 {
224 unsigned long flag;
225 struct msm_dp_event *todo;
226 int pndx;
227
228 spin_lock_irqsave(&msm_dp_priv->event_lock, flag);
229 pndx = msm_dp_priv->event_pndx + 1;
230 pndx %= DP_EVENT_Q_MAX;
231 if (pndx == msm_dp_priv->event_gndx) {
232 pr_err("event_q is full: pndx=%d gndx=%d\n",
233 msm_dp_priv->event_pndx, msm_dp_priv->event_gndx);
234 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
235 return -EPERM;
236 }
237 todo = &msm_dp_priv->event_list[msm_dp_priv->event_pndx++];
238 msm_dp_priv->event_pndx %= DP_EVENT_Q_MAX;
239 todo->event_id = event;
240 todo->data = data;
241 todo->delay = delay;
242 wake_up(&msm_dp_priv->event_q);
243 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
244
245 return 0;
246 }
247
msm_dp_del_event(struct msm_dp_display_private * msm_dp_priv,u32 event)248 static int msm_dp_del_event(struct msm_dp_display_private *msm_dp_priv, u32 event)
249 {
250 unsigned long flag;
251 struct msm_dp_event *todo;
252 u32 gndx;
253
254 spin_lock_irqsave(&msm_dp_priv->event_lock, flag);
255 if (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) {
256 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
257 return -ENOENT;
258 }
259
260 gndx = msm_dp_priv->event_gndx;
261 while (msm_dp_priv->event_pndx != gndx) {
262 todo = &msm_dp_priv->event_list[gndx];
263 if (todo->event_id == event) {
264 todo->event_id = EV_NO_EVENT; /* deleted */
265 todo->delay = 0;
266 }
267 gndx++;
268 gndx %= DP_EVENT_Q_MAX;
269 }
270 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
271
272 return 0;
273 }
274
msm_dp_display_signal_audio_start(struct msm_dp * msm_dp_display)275 void msm_dp_display_signal_audio_start(struct msm_dp *msm_dp_display)
276 {
277 struct msm_dp_display_private *dp;
278
279 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
280
281 reinit_completion(&dp->audio_comp);
282 }
283
msm_dp_display_signal_audio_complete(struct msm_dp * msm_dp_display)284 void msm_dp_display_signal_audio_complete(struct msm_dp *msm_dp_display)
285 {
286 struct msm_dp_display_private *dp;
287
288 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
289
290 complete_all(&dp->audio_comp);
291 }
292
293 static int msm_dp_hpd_event_thread_start(struct msm_dp_display_private *msm_dp_priv);
294
msm_dp_display_bind(struct device * dev,struct device * master,void * data)295 static int msm_dp_display_bind(struct device *dev, struct device *master,
296 void *data)
297 {
298 int rc = 0;
299 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
300 struct msm_drm_private *priv = dev_get_drvdata(master);
301 struct drm_device *drm = priv->dev;
302
303 dp->msm_dp_display.drm_dev = drm;
304 priv->kms->dp[dp->id] = &dp->msm_dp_display;
305
306 dp->drm_dev = drm;
307 dp->aux->drm_dev = drm;
308 rc = msm_dp_aux_register(dp->aux);
309 if (rc) {
310 DRM_ERROR("DRM DP AUX register failed\n");
311 goto end;
312 }
313
314 rc = msm_dp_hpd_event_thread_start(dp);
315 if (rc) {
316 DRM_ERROR("Event thread create failed\n");
317 goto end;
318 }
319
320 return 0;
321 end:
322 return rc;
323 }
324
msm_dp_display_unbind(struct device * dev,struct device * master,void * data)325 static void msm_dp_display_unbind(struct device *dev, struct device *master,
326 void *data)
327 {
328 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
329 struct msm_drm_private *priv = dev_get_drvdata(master);
330
331 kthread_stop(dp->ev_tsk);
332
333 of_dp_aux_depopulate_bus(dp->aux);
334
335 msm_dp_aux_unregister(dp->aux);
336 dp->drm_dev = NULL;
337 dp->aux->drm_dev = NULL;
338 priv->kms->dp[dp->id] = NULL;
339 }
340
341 static const struct component_ops msm_dp_display_comp_ops = {
342 .bind = msm_dp_display_bind,
343 .unbind = msm_dp_display_unbind,
344 };
345
msm_dp_display_send_hpd_event(struct msm_dp * msm_dp_display)346 static void msm_dp_display_send_hpd_event(struct msm_dp *msm_dp_display)
347 {
348 struct msm_dp_display_private *dp;
349 struct drm_connector *connector;
350
351 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
352
353 connector = dp->msm_dp_display.connector;
354 drm_helper_hpd_irq_event(connector->dev);
355 }
356
msm_dp_display_send_hpd_notification(struct msm_dp_display_private * dp,bool hpd)357 static int msm_dp_display_send_hpd_notification(struct msm_dp_display_private *dp,
358 bool hpd)
359 {
360 if ((hpd && dp->msm_dp_display.link_ready) ||
361 (!hpd && !dp->msm_dp_display.link_ready)) {
362 drm_dbg_dp(dp->drm_dev, "HPD already %s\n", str_on_off(hpd));
363 return 0;
364 }
365
366 /* reset video pattern flag on disconnect */
367 if (!hpd) {
368 dp->panel->video_test = false;
369 if (!dp->msm_dp_display.is_edp)
370 drm_dp_set_subconnector_property(dp->msm_dp_display.connector,
371 connector_status_disconnected,
372 dp->panel->dpcd,
373 dp->panel->downstream_ports);
374 }
375
376 dp->msm_dp_display.link_ready = hpd;
377
378 drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
379 dp->msm_dp_display.connector_type, hpd);
380 msm_dp_display_send_hpd_event(&dp->msm_dp_display);
381
382 return 0;
383 }
384
msm_dp_display_lttpr_init(struct msm_dp_display_private * dp,u8 * dpcd)385 static int msm_dp_display_lttpr_init(struct msm_dp_display_private *dp, u8 *dpcd)
386 {
387 int rc, lttpr_count;
388
389 if (drm_dp_read_lttpr_common_caps(dp->aux, dpcd, dp->link->lttpr_common_caps))
390 return 0;
391
392 lttpr_count = drm_dp_lttpr_count(dp->link->lttpr_common_caps);
393 rc = drm_dp_lttpr_init(dp->aux, lttpr_count);
394 if (rc) {
395 DRM_ERROR("failed to set LTTPRs transparency mode, rc=%d\n", rc);
396 return 0;
397 }
398
399 return lttpr_count;
400 }
401
msm_dp_display_process_hpd_high(struct msm_dp_display_private * dp)402 static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp)
403 {
404 struct drm_connector *connector = dp->msm_dp_display.connector;
405 const struct drm_display_info *info = &connector->display_info;
406 int rc = 0;
407 u8 dpcd[DP_RECEIVER_CAP_SIZE];
408
409 rc = drm_dp_read_dpcd_caps(dp->aux, dpcd);
410 if (rc)
411 goto end;
412
413 dp->link->lttpr_count = msm_dp_display_lttpr_init(dp, dpcd);
414
415 rc = msm_dp_panel_read_sink_caps(dp->panel, connector);
416 if (rc)
417 goto end;
418
419 msm_dp_link_process_request(dp->link);
420
421 if (!dp->msm_dp_display.is_edp)
422 drm_dp_set_subconnector_property(connector,
423 connector_status_connected,
424 dp->panel->dpcd,
425 dp->panel->downstream_ports);
426
427 dp->msm_dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
428
429 dp->audio_supported = info->has_audio;
430 msm_dp_panel_handle_sink_request(dp->panel);
431
432 /*
433 * set sink to normal operation mode -- D0
434 * before dpcd read
435 */
436 msm_dp_link_psm_config(dp->link, &dp->panel->link_info, false);
437
438 msm_dp_link_reset_phy_params_vx_px(dp->link);
439 rc = msm_dp_ctrl_on_link(dp->ctrl);
440 if (rc) {
441 DRM_ERROR("failed to complete DP link training\n");
442 goto end;
443 }
444
445 msm_dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
446
447 end:
448 return rc;
449 }
450
msm_dp_display_host_phy_init(struct msm_dp_display_private * dp)451 static void msm_dp_display_host_phy_init(struct msm_dp_display_private *dp)
452 {
453 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
454 dp->msm_dp_display.connector_type, dp->core_initialized,
455 dp->phy_initialized);
456
457 if (!dp->phy_initialized) {
458 msm_dp_ctrl_phy_init(dp->ctrl);
459 dp->phy_initialized = true;
460 }
461 }
462
msm_dp_display_host_phy_exit(struct msm_dp_display_private * dp)463 static void msm_dp_display_host_phy_exit(struct msm_dp_display_private *dp)
464 {
465 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
466 dp->msm_dp_display.connector_type, dp->core_initialized,
467 dp->phy_initialized);
468
469 if (dp->phy_initialized) {
470 msm_dp_ctrl_phy_exit(dp->ctrl);
471 dp->phy_initialized = false;
472 }
473 }
474
msm_dp_display_host_init(struct msm_dp_display_private * dp)475 static void msm_dp_display_host_init(struct msm_dp_display_private *dp)
476 {
477 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
478 dp->msm_dp_display.connector_type, dp->core_initialized,
479 dp->phy_initialized);
480
481 msm_dp_ctrl_core_clk_enable(dp->ctrl);
482 msm_dp_ctrl_reset(dp->ctrl);
483 msm_dp_ctrl_enable_irq(dp->ctrl);
484 msm_dp_aux_init(dp->aux);
485 dp->core_initialized = true;
486 }
487
msm_dp_display_host_deinit(struct msm_dp_display_private * dp)488 static void msm_dp_display_host_deinit(struct msm_dp_display_private *dp)
489 {
490 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
491 dp->msm_dp_display.connector_type, dp->core_initialized,
492 dp->phy_initialized);
493
494 msm_dp_ctrl_reset(dp->ctrl);
495 msm_dp_ctrl_disable_irq(dp->ctrl);
496 msm_dp_aux_deinit(dp->aux);
497 msm_dp_ctrl_core_clk_disable(dp->ctrl);
498 dp->core_initialized = false;
499 }
500
msm_dp_display_usbpd_configure_cb(struct device * dev)501 static int msm_dp_display_usbpd_configure_cb(struct device *dev)
502 {
503 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
504
505 msm_dp_display_host_phy_init(dp);
506
507 return msm_dp_display_process_hpd_high(dp);
508 }
509
msm_dp_display_notify_disconnect(struct device * dev)510 static int msm_dp_display_notify_disconnect(struct device *dev)
511 {
512 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
513
514 msm_dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
515
516 return 0;
517 }
518
msm_dp_display_handle_video_request(struct msm_dp_display_private * dp)519 static void msm_dp_display_handle_video_request(struct msm_dp_display_private *dp)
520 {
521 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
522 dp->panel->video_test = true;
523 msm_dp_link_send_test_response(dp->link);
524 }
525 }
526
msm_dp_display_handle_port_status_changed(struct msm_dp_display_private * dp)527 static int msm_dp_display_handle_port_status_changed(struct msm_dp_display_private *dp)
528 {
529 int rc = 0;
530
531 if (drm_dp_is_branch(dp->panel->dpcd) && dp->link->sink_count == 0) {
532 drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n");
533 if (dp->hpd_state != ST_DISCONNECTED) {
534 dp->hpd_state = ST_DISCONNECT_PENDING;
535 msm_dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
536 }
537 } else {
538 if (dp->hpd_state == ST_DISCONNECTED) {
539 dp->hpd_state = ST_MAINLINK_READY;
540 rc = msm_dp_display_process_hpd_high(dp);
541 if (rc)
542 dp->hpd_state = ST_DISCONNECTED;
543 }
544 }
545
546 return rc;
547 }
548
msm_dp_display_handle_irq_hpd(struct msm_dp_display_private * dp)549 static int msm_dp_display_handle_irq_hpd(struct msm_dp_display_private *dp)
550 {
551 u32 sink_request = dp->link->sink_request;
552
553 drm_dbg_dp(dp->drm_dev, "%d\n", sink_request);
554 if (dp->hpd_state == ST_DISCONNECTED) {
555 if (sink_request & DP_LINK_STATUS_UPDATED) {
556 drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n",
557 sink_request);
558 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
559 return -EINVAL;
560 }
561 }
562
563 msm_dp_ctrl_handle_sink_request(dp->ctrl);
564
565 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
566 msm_dp_display_handle_video_request(dp);
567
568 return 0;
569 }
570
msm_dp_display_usbpd_attention_cb(struct device * dev)571 static int msm_dp_display_usbpd_attention_cb(struct device *dev)
572 {
573 int rc = 0;
574 u32 sink_request;
575 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
576
577 /* check for any test request issued by sink */
578 rc = msm_dp_link_process_request(dp->link);
579 if (!rc) {
580 sink_request = dp->link->sink_request;
581 drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n",
582 dp->hpd_state, sink_request);
583 if (sink_request & DS_PORT_STATUS_CHANGED)
584 rc = msm_dp_display_handle_port_status_changed(dp);
585 else
586 rc = msm_dp_display_handle_irq_hpd(dp);
587 }
588
589 return rc;
590 }
591
msm_dp_hpd_plug_handle(struct msm_dp_display_private * dp,u32 data)592 static int msm_dp_hpd_plug_handle(struct msm_dp_display_private *dp, u32 data)
593 {
594 u32 state;
595 int ret;
596 struct platform_device *pdev = dp->msm_dp_display.pdev;
597
598 msm_dp_aux_enable_xfers(dp->aux, true);
599
600 mutex_lock(&dp->event_mutex);
601
602 state = dp->hpd_state;
603 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
604 dp->msm_dp_display.connector_type, state);
605
606 if (state == ST_DISPLAY_OFF) {
607 mutex_unlock(&dp->event_mutex);
608 return 0;
609 }
610
611 if (state == ST_MAINLINK_READY || state == ST_CONNECTED) {
612 mutex_unlock(&dp->event_mutex);
613 return 0;
614 }
615
616 if (state == ST_DISCONNECT_PENDING) {
617 /* wait until ST_DISCONNECTED */
618 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
619 mutex_unlock(&dp->event_mutex);
620 return 0;
621 }
622
623 ret = pm_runtime_resume_and_get(&pdev->dev);
624 if (ret) {
625 DRM_ERROR("failed to pm_runtime_resume\n");
626 mutex_unlock(&dp->event_mutex);
627 return ret;
628 }
629
630 ret = msm_dp_display_usbpd_configure_cb(&pdev->dev);
631 if (ret) { /* link train failed */
632 dp->hpd_state = ST_DISCONNECTED;
633 pm_runtime_put_sync(&pdev->dev);
634 } else {
635 dp->hpd_state = ST_MAINLINK_READY;
636 }
637
638 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
639 dp->msm_dp_display.connector_type, state);
640 mutex_unlock(&dp->event_mutex);
641
642 /* uevent will complete connection part */
643 return 0;
644 };
645
msm_dp_display_handle_plugged_change(struct msm_dp * msm_dp_display,bool plugged)646 static void msm_dp_display_handle_plugged_change(struct msm_dp *msm_dp_display,
647 bool plugged)
648 {
649 struct msm_dp_display_private *dp;
650
651 dp = container_of(msm_dp_display,
652 struct msm_dp_display_private, msm_dp_display);
653
654 /* notify audio subsystem only if sink supports audio */
655 if (dp->audio_supported)
656 drm_connector_hdmi_audio_plugged_notify(msm_dp_display->connector,
657 plugged);
658 }
659
msm_dp_hpd_unplug_handle(struct msm_dp_display_private * dp,u32 data)660 static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data)
661 {
662 u32 state;
663 struct platform_device *pdev = dp->msm_dp_display.pdev;
664
665 msm_dp_aux_enable_xfers(dp->aux, false);
666
667 mutex_lock(&dp->event_mutex);
668
669 state = dp->hpd_state;
670
671 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
672 dp->msm_dp_display.connector_type, state);
673
674 /* unplugged, no more irq_hpd handle */
675 msm_dp_del_event(dp, EV_IRQ_HPD_INT);
676
677 if (state == ST_DISCONNECTED) {
678 /* triggered by irq_hdp with sink_count = 0 */
679 if (dp->link->sink_count == 0) {
680 msm_dp_display_host_phy_exit(dp);
681 }
682 msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
683 mutex_unlock(&dp->event_mutex);
684 return 0;
685 } else if (state == ST_DISCONNECT_PENDING) {
686 mutex_unlock(&dp->event_mutex);
687 return 0;
688 } else if (state == ST_MAINLINK_READY) {
689 msm_dp_ctrl_off_link(dp->ctrl);
690 msm_dp_display_host_phy_exit(dp);
691 dp->hpd_state = ST_DISCONNECTED;
692 msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
693 pm_runtime_put_sync(&pdev->dev);
694 mutex_unlock(&dp->event_mutex);
695 return 0;
696 }
697
698 /*
699 * We don't need separate work for disconnect as
700 * connect/attention interrupts are disabled
701 */
702 msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
703
704 if (state == ST_DISPLAY_OFF) {
705 dp->hpd_state = ST_DISCONNECTED;
706 } else {
707 dp->hpd_state = ST_DISCONNECT_PENDING;
708 }
709
710 /* signal the disconnect event early to ensure proper teardown */
711 msm_dp_display_handle_plugged_change(&dp->msm_dp_display, false);
712
713 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
714 dp->msm_dp_display.connector_type, state);
715
716 /* uevent will complete disconnection part */
717 pm_runtime_put_sync(&pdev->dev);
718 mutex_unlock(&dp->event_mutex);
719 return 0;
720 }
721
msm_dp_irq_hpd_handle(struct msm_dp_display_private * dp,u32 data)722 static int msm_dp_irq_hpd_handle(struct msm_dp_display_private *dp, u32 data)
723 {
724 u32 state;
725
726 mutex_lock(&dp->event_mutex);
727
728 /* irq_hpd can happen at either connected or disconnected state */
729 state = dp->hpd_state;
730 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
731 dp->msm_dp_display.connector_type, state);
732
733 if (state == ST_DISPLAY_OFF) {
734 mutex_unlock(&dp->event_mutex);
735 return 0;
736 }
737
738 if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
739 /* wait until ST_CONNECTED */
740 msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
741 mutex_unlock(&dp->event_mutex);
742 return 0;
743 }
744
745 msm_dp_display_usbpd_attention_cb(&dp->msm_dp_display.pdev->dev);
746
747 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
748 dp->msm_dp_display.connector_type, state);
749
750 mutex_unlock(&dp->event_mutex);
751
752 return 0;
753 }
754
msm_dp_display_deinit_sub_modules(struct msm_dp_display_private * dp)755 static void msm_dp_display_deinit_sub_modules(struct msm_dp_display_private *dp)
756 {
757 msm_dp_audio_put(dp->audio);
758 msm_dp_panel_put(dp->panel);
759 msm_dp_aux_put(dp->aux);
760 }
761
msm_dp_init_sub_modules(struct msm_dp_display_private * dp)762 static int msm_dp_init_sub_modules(struct msm_dp_display_private *dp)
763 {
764 int rc = 0;
765 struct device *dev = &dp->msm_dp_display.pdev->dev;
766 struct phy *phy;
767
768 phy = devm_phy_get(dev, "dp");
769 if (IS_ERR(phy))
770 return PTR_ERR(phy);
771
772 rc = phy_set_mode_ext(phy, PHY_MODE_DP,
773 dp->msm_dp_display.is_edp ? PHY_SUBMODE_EDP : PHY_SUBMODE_DP);
774 if (rc) {
775 DRM_ERROR("failed to set phy submode, rc = %d\n", rc);
776 goto error;
777 }
778
779 dp->aux = msm_dp_aux_get(dev, phy, dp->msm_dp_display.is_edp, dp->aux_base);
780 if (IS_ERR(dp->aux)) {
781 rc = PTR_ERR(dp->aux);
782 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
783 dp->aux = NULL;
784 goto error;
785 }
786
787 dp->link = msm_dp_link_get(dev, dp->aux);
788 if (IS_ERR(dp->link)) {
789 rc = PTR_ERR(dp->link);
790 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
791 dp->link = NULL;
792 goto error_link;
793 }
794
795 dp->panel = msm_dp_panel_get(dev, dp->aux, dp->link, dp->link_base, dp->p0_base);
796 if (IS_ERR(dp->panel)) {
797 rc = PTR_ERR(dp->panel);
798 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
799 dp->panel = NULL;
800 goto error_link;
801 }
802
803 dp->ctrl = msm_dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
804 phy, dp->ahb_base, dp->link_base);
805 if (IS_ERR(dp->ctrl)) {
806 rc = PTR_ERR(dp->ctrl);
807 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
808 dp->ctrl = NULL;
809 goto error_ctrl;
810 }
811
812 dp->audio = msm_dp_audio_get(dp->msm_dp_display.pdev, dp->link_base);
813 if (IS_ERR(dp->audio)) {
814 rc = PTR_ERR(dp->audio);
815 pr_err("failed to initialize audio, rc = %d\n", rc);
816 dp->audio = NULL;
817 goto error_ctrl;
818 }
819
820 return rc;
821
822 error_ctrl:
823 msm_dp_panel_put(dp->panel);
824 error_link:
825 msm_dp_aux_put(dp->aux);
826 error:
827 return rc;
828 }
829
msm_dp_display_set_mode(struct msm_dp * msm_dp_display,struct msm_dp_display_mode * mode)830 static int msm_dp_display_set_mode(struct msm_dp *msm_dp_display,
831 struct msm_dp_display_mode *mode)
832 {
833 struct msm_dp_display_private *dp;
834
835 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
836
837 drm_mode_copy(&dp->panel->msm_dp_mode.drm_mode, &mode->drm_mode);
838 dp->panel->msm_dp_mode.bpp = mode->bpp;
839 dp->panel->msm_dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420;
840 msm_dp_panel_init_panel_info(dp->panel);
841 return 0;
842 }
843
msm_dp_display_enable(struct msm_dp_display_private * dp,bool force_link_train)844 static int msm_dp_display_enable(struct msm_dp_display_private *dp, bool force_link_train)
845 {
846 int rc = 0;
847 struct msm_dp *msm_dp_display = &dp->msm_dp_display;
848
849 drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
850 if (msm_dp_display->power_on) {
851 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
852 return 0;
853 }
854
855 rc = msm_dp_ctrl_on_stream(dp->ctrl, force_link_train);
856 if (!rc)
857 msm_dp_display->power_on = true;
858
859 return rc;
860 }
861
msm_dp_display_post_enable(struct msm_dp * msm_dp_display)862 static int msm_dp_display_post_enable(struct msm_dp *msm_dp_display)
863 {
864 struct msm_dp_display_private *dp;
865 u32 rate;
866
867 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
868
869 rate = dp->link->link_params.rate;
870
871 if (dp->audio_supported) {
872 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
873 dp->audio->lane_count = dp->link->link_params.num_lanes;
874 }
875
876 /* signal the connect event late to synchronize video and display */
877 msm_dp_display_handle_plugged_change(msm_dp_display, true);
878
879 if (msm_dp_display->psr_supported)
880 msm_dp_ctrl_config_psr(dp->ctrl);
881
882 return 0;
883 }
884
msm_dp_display_disable(struct msm_dp_display_private * dp)885 static int msm_dp_display_disable(struct msm_dp_display_private *dp)
886 {
887 struct msm_dp *msm_dp_display = &dp->msm_dp_display;
888
889 if (!msm_dp_display->power_on)
890 return 0;
891
892 /* wait only if audio was enabled */
893 if (msm_dp_display->audio_enabled) {
894 /* signal the disconnect event */
895 msm_dp_display_handle_plugged_change(msm_dp_display, false);
896 if (!wait_for_completion_timeout(&dp->audio_comp,
897 HZ * 5))
898 DRM_ERROR("audio comp timeout\n");
899 }
900
901 msm_dp_display->audio_enabled = false;
902
903 if (dp->link->sink_count == 0) {
904 /*
905 * irq_hpd with sink_count = 0
906 * hdmi unplugged out of dongle
907 */
908 msm_dp_ctrl_off_link_stream(dp->ctrl);
909 } else {
910 /*
911 * unplugged interrupt
912 * dongle unplugged out of DUT
913 */
914 msm_dp_ctrl_off(dp->ctrl);
915 msm_dp_display_host_phy_exit(dp);
916 }
917
918 msm_dp_display->power_on = false;
919
920 drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
921 return 0;
922 }
923
924 /**
925 * msm_dp_bridge_mode_valid - callback to determine if specified mode is valid
926 * @bridge: Pointer to drm bridge structure
927 * @info: display info
928 * @mode: Pointer to drm mode structure
929 * Returns: Validity status for specified mode
930 */
msm_dp_bridge_mode_valid(struct drm_bridge * bridge,const struct drm_display_info * info,const struct drm_display_mode * mode)931 enum drm_mode_status msm_dp_bridge_mode_valid(struct drm_bridge *bridge,
932 const struct drm_display_info *info,
933 const struct drm_display_mode *mode)
934 {
935 const u32 num_components = 3, default_bpp = 24;
936 struct msm_dp_display_private *msm_dp_display;
937 struct msm_dp_link_info *link_info;
938 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
939 struct msm_dp *dp;
940 int mode_pclk_khz = mode->clock;
941
942 dp = to_dp_bridge(bridge)->msm_dp_display;
943
944 if (!dp || !mode_pclk_khz || !dp->connector) {
945 DRM_ERROR("invalid params\n");
946 return -EINVAL;
947 }
948
949 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
950 link_info = &msm_dp_display->panel->link_info;
951
952 if ((drm_mode_is_420_only(&dp->connector->display_info, mode) &&
953 msm_dp_display->panel->vsc_sdp_supported) ||
954 msm_dp_wide_bus_available(dp))
955 mode_pclk_khz /= 2;
956
957 if (mode_pclk_khz > DP_MAX_PIXEL_CLK_KHZ)
958 return MODE_CLOCK_HIGH;
959
960 mode_bpp = dp->connector->display_info.bpc * num_components;
961 if (!mode_bpp)
962 mode_bpp = default_bpp;
963
964 mode_bpp = msm_dp_panel_get_mode_bpp(msm_dp_display->panel,
965 mode_bpp, mode_pclk_khz);
966
967 mode_rate_khz = mode_pclk_khz * mode_bpp;
968 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
969
970 if (mode_rate_khz > supported_rate_khz)
971 return MODE_BAD;
972
973 return MODE_OK;
974 }
975
msm_dp_display_get_modes(struct msm_dp * dp)976 int msm_dp_display_get_modes(struct msm_dp *dp)
977 {
978 struct msm_dp_display_private *msm_dp_display;
979
980 if (!dp) {
981 DRM_ERROR("invalid params\n");
982 return 0;
983 }
984
985 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
986
987 return msm_dp_panel_get_modes(msm_dp_display->panel,
988 dp->connector);
989 }
990
msm_dp_display_check_video_test(struct msm_dp * dp)991 bool msm_dp_display_check_video_test(struct msm_dp *dp)
992 {
993 struct msm_dp_display_private *msm_dp_display;
994
995 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
996
997 return msm_dp_display->panel->video_test;
998 }
999
msm_dp_display_get_test_bpp(struct msm_dp * dp)1000 int msm_dp_display_get_test_bpp(struct msm_dp *dp)
1001 {
1002 struct msm_dp_display_private *msm_dp_display;
1003
1004 if (!dp) {
1005 DRM_ERROR("invalid params\n");
1006 return 0;
1007 }
1008
1009 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1010
1011 return msm_dp_link_bit_depth_to_bpp(
1012 msm_dp_display->link->test_video.test_bit_depth);
1013 }
1014
msm_dp_snapshot(struct msm_disp_state * disp_state,struct msm_dp * dp)1015 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
1016 {
1017 struct msm_dp_display_private *msm_dp_display;
1018
1019 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1020
1021 /*
1022 * if we are reading registers we need the link clocks to be on
1023 * however till DP cable is connected this will not happen as we
1024 * do not know the resolution to power up with. Hence check the
1025 * power_on status before dumping DP registers to avoid crash due
1026 * to unclocked access
1027 */
1028 mutex_lock(&msm_dp_display->event_mutex);
1029
1030 if (!dp->power_on) {
1031 mutex_unlock(&msm_dp_display->event_mutex);
1032 return;
1033 }
1034
1035 msm_disp_snapshot_add_block(disp_state, msm_dp_display->ahb_len,
1036 msm_dp_display->ahb_base, "dp_ahb");
1037 msm_disp_snapshot_add_block(disp_state, msm_dp_display->aux_len,
1038 msm_dp_display->aux_base, "dp_aux");
1039 msm_disp_snapshot_add_block(disp_state, msm_dp_display->link_len,
1040 msm_dp_display->link_base, "dp_link");
1041 msm_disp_snapshot_add_block(disp_state, msm_dp_display->p0_len,
1042 msm_dp_display->p0_base, "dp_p0");
1043
1044 mutex_unlock(&msm_dp_display->event_mutex);
1045 }
1046
msm_dp_display_set_psr(struct msm_dp * msm_dp_display,bool enter)1047 void msm_dp_display_set_psr(struct msm_dp *msm_dp_display, bool enter)
1048 {
1049 struct msm_dp_display_private *dp;
1050
1051 if (!msm_dp_display) {
1052 DRM_ERROR("invalid params\n");
1053 return;
1054 }
1055
1056 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1057 msm_dp_ctrl_set_psr(dp->ctrl, enter);
1058 }
1059
hpd_event_thread(void * data)1060 static int hpd_event_thread(void *data)
1061 {
1062 struct msm_dp_display_private *msm_dp_priv;
1063 unsigned long flag;
1064 struct msm_dp_event *todo;
1065 int timeout_mode = 0;
1066
1067 msm_dp_priv = (struct msm_dp_display_private *)data;
1068
1069 while (1) {
1070 if (timeout_mode) {
1071 wait_event_timeout(msm_dp_priv->event_q,
1072 (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) ||
1073 kthread_should_stop(), EVENT_TIMEOUT);
1074 } else {
1075 wait_event_interruptible(msm_dp_priv->event_q,
1076 (msm_dp_priv->event_pndx != msm_dp_priv->event_gndx) ||
1077 kthread_should_stop());
1078 }
1079
1080 if (kthread_should_stop())
1081 break;
1082
1083 spin_lock_irqsave(&msm_dp_priv->event_lock, flag);
1084 todo = &msm_dp_priv->event_list[msm_dp_priv->event_gndx];
1085 if (todo->delay) {
1086 struct msm_dp_event *todo_next;
1087
1088 msm_dp_priv->event_gndx++;
1089 msm_dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1090
1091 /* re enter delay event into q */
1092 todo_next = &msm_dp_priv->event_list[msm_dp_priv->event_pndx++];
1093 msm_dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1094 todo_next->event_id = todo->event_id;
1095 todo_next->data = todo->data;
1096 todo_next->delay = todo->delay - 1;
1097
1098 /* clean up older event */
1099 todo->event_id = EV_NO_EVENT;
1100 todo->delay = 0;
1101
1102 /* switch to timeout mode */
1103 timeout_mode = 1;
1104 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
1105 continue;
1106 }
1107
1108 /* timeout with no events in q */
1109 if (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) {
1110 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
1111 continue;
1112 }
1113
1114 msm_dp_priv->event_gndx++;
1115 msm_dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1116 timeout_mode = 0;
1117 spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag);
1118
1119 switch (todo->event_id) {
1120 case EV_HPD_PLUG_INT:
1121 msm_dp_hpd_plug_handle(msm_dp_priv, todo->data);
1122 break;
1123 case EV_HPD_UNPLUG_INT:
1124 msm_dp_hpd_unplug_handle(msm_dp_priv, todo->data);
1125 break;
1126 case EV_IRQ_HPD_INT:
1127 msm_dp_irq_hpd_handle(msm_dp_priv, todo->data);
1128 break;
1129 case EV_USER_NOTIFICATION:
1130 msm_dp_display_send_hpd_notification(msm_dp_priv,
1131 todo->data);
1132 break;
1133 default:
1134 break;
1135 }
1136 }
1137
1138 return 0;
1139 }
1140
msm_dp_hpd_event_thread_start(struct msm_dp_display_private * msm_dp_priv)1141 static int msm_dp_hpd_event_thread_start(struct msm_dp_display_private *msm_dp_priv)
1142 {
1143 /* set event q to empty */
1144 msm_dp_priv->event_gndx = 0;
1145 msm_dp_priv->event_pndx = 0;
1146
1147 msm_dp_priv->ev_tsk = kthread_run(hpd_event_thread, msm_dp_priv, "dp_hpd_handler");
1148 if (IS_ERR(msm_dp_priv->ev_tsk))
1149 return PTR_ERR(msm_dp_priv->ev_tsk);
1150
1151 return 0;
1152 }
1153
msm_dp_display_irq_handler(int irq,void * dev_id)1154 static irqreturn_t msm_dp_display_irq_handler(int irq, void *dev_id)
1155 {
1156 struct msm_dp_display_private *dp = dev_id;
1157 irqreturn_t ret = IRQ_NONE;
1158 u32 hpd_isr_status;
1159
1160 if (!dp) {
1161 DRM_ERROR("invalid data\n");
1162 return IRQ_NONE;
1163 }
1164
1165 hpd_isr_status = msm_dp_aux_get_hpd_intr_status(dp->aux);
1166
1167 if (hpd_isr_status & 0x0F) {
1168 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
1169 dp->msm_dp_display.connector_type, hpd_isr_status);
1170 /* hpd related interrupts */
1171 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1172 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1173
1174 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1175 msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1176 }
1177
1178 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1179 msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1180 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1181 }
1182
1183 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1184 msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1185
1186 ret = IRQ_HANDLED;
1187 }
1188
1189 /* DP controller isr */
1190 ret |= msm_dp_ctrl_isr(dp->ctrl);
1191
1192 return ret;
1193 }
1194
msm_dp_display_request_irq(struct msm_dp_display_private * dp)1195 static int msm_dp_display_request_irq(struct msm_dp_display_private *dp)
1196 {
1197 int rc = 0;
1198 struct platform_device *pdev = dp->msm_dp_display.pdev;
1199
1200 dp->irq = platform_get_irq(pdev, 0);
1201 if (dp->irq < 0) {
1202 DRM_ERROR("failed to get irq\n");
1203 return dp->irq;
1204 }
1205
1206 rc = devm_request_irq(&pdev->dev, dp->irq, msm_dp_display_irq_handler,
1207 IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN,
1208 "dp_display_isr", dp);
1209
1210 if (rc < 0) {
1211 DRM_ERROR("failed to request IRQ%u: %d\n",
1212 dp->irq, rc);
1213 return rc;
1214 }
1215
1216 return 0;
1217 }
1218
msm_dp_display_get_desc(struct platform_device * pdev)1219 static const struct msm_dp_desc *msm_dp_display_get_desc(struct platform_device *pdev)
1220 {
1221 const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
1222 struct resource *res;
1223 int i;
1224
1225 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1226 if (!res)
1227 return NULL;
1228
1229 for (i = 0; i < descs[i].io_start; i++) {
1230 if (descs[i].io_start == res->start)
1231 return &descs[i];
1232 }
1233
1234 dev_err(&pdev->dev, "unknown displayport instance\n");
1235 return NULL;
1236 }
1237
msm_dp_display_probe_tail(struct device * dev)1238 static int msm_dp_display_probe_tail(struct device *dev)
1239 {
1240 struct msm_dp *dp = dev_get_drvdata(dev);
1241 int ret;
1242
1243 /*
1244 * External bridges are mandatory for eDP interfaces: one has to
1245 * provide at least an eDP panel (which gets wrapped into panel-bridge).
1246 *
1247 * For DisplayPort interfaces external bridges are optional, so
1248 * silently ignore an error if one is not present (-ENODEV).
1249 */
1250 dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
1251 if (IS_ERR(dp->next_bridge)) {
1252 ret = PTR_ERR(dp->next_bridge);
1253 dp->next_bridge = NULL;
1254 if (dp->is_edp || ret != -ENODEV)
1255 return ret;
1256 }
1257
1258 ret = component_add(dev, &msm_dp_display_comp_ops);
1259 if (ret)
1260 DRM_ERROR("component add failed, rc=%d\n", ret);
1261
1262 return ret;
1263 }
1264
msm_dp_auxbus_done_probe(struct drm_dp_aux * aux)1265 static int msm_dp_auxbus_done_probe(struct drm_dp_aux *aux)
1266 {
1267 return msm_dp_display_probe_tail(aux->dev);
1268 }
1269
msm_dp_display_get_connector_type(struct platform_device * pdev,const struct msm_dp_desc * desc)1270 static int msm_dp_display_get_connector_type(struct platform_device *pdev,
1271 const struct msm_dp_desc *desc)
1272 {
1273 struct device_node *node = pdev->dev.of_node;
1274 struct device_node *aux_bus = of_get_child_by_name(node, "aux-bus");
1275 struct device_node *panel = of_get_child_by_name(aux_bus, "panel");
1276 int connector_type;
1277
1278 if (panel)
1279 connector_type = DRM_MODE_CONNECTOR_eDP;
1280 else
1281 connector_type = DRM_MODE_SUBCONNECTOR_DisplayPort;
1282
1283 of_node_put(panel);
1284 of_node_put(aux_bus);
1285
1286 return connector_type;
1287 }
1288
msm_dp_ioremap(struct platform_device * pdev,int idx,size_t * len)1289 static void __iomem *msm_dp_ioremap(struct platform_device *pdev, int idx, size_t *len)
1290 {
1291 struct resource *res;
1292 void __iomem *base;
1293
1294 base = devm_platform_get_and_ioremap_resource(pdev, idx, &res);
1295 if (!IS_ERR(base))
1296 *len = resource_size(res);
1297
1298 return base;
1299 }
1300
1301 #define DP_DEFAULT_AHB_OFFSET 0x0000
1302 #define DP_DEFAULT_AHB_SIZE 0x0200
1303 #define DP_DEFAULT_AUX_OFFSET 0x0200
1304 #define DP_DEFAULT_AUX_SIZE 0x0200
1305 #define DP_DEFAULT_LINK_OFFSET 0x0400
1306 #define DP_DEFAULT_LINK_SIZE 0x0C00
1307 #define DP_DEFAULT_P0_OFFSET 0x1000
1308 #define DP_DEFAULT_P0_SIZE 0x0400
1309
msm_dp_display_get_io(struct msm_dp_display_private * display)1310 static int msm_dp_display_get_io(struct msm_dp_display_private *display)
1311 {
1312 struct platform_device *pdev = display->msm_dp_display.pdev;
1313
1314 display->ahb_base = msm_dp_ioremap(pdev, 0, &display->ahb_len);
1315 if (IS_ERR(display->ahb_base))
1316 return PTR_ERR(display->ahb_base);
1317
1318 display->aux_base = msm_dp_ioremap(pdev, 1, &display->aux_len);
1319 if (IS_ERR(display->aux_base)) {
1320 if (display->aux_base != ERR_PTR(-EINVAL)) {
1321 DRM_ERROR("unable to remap aux region: %pe\n", display->aux_base);
1322 return PTR_ERR(display->aux_base);
1323 }
1324
1325 /*
1326 * The initial binding had a single reg, but in order to
1327 * support variation in the sub-region sizes this was split.
1328 * msm_dp_ioremap() will fail with -EINVAL here if only a single
1329 * reg is specified, so fill in the sub-region offsets and
1330 * lengths based on this single region.
1331 */
1332 if (display->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) {
1333 DRM_ERROR("legacy memory region not large enough\n");
1334 return -EINVAL;
1335 }
1336
1337 display->ahb_len = DP_DEFAULT_AHB_SIZE;
1338 display->aux_base = display->ahb_base + DP_DEFAULT_AUX_OFFSET;
1339 display->aux_len = DP_DEFAULT_AUX_SIZE;
1340 display->link_base = display->ahb_base + DP_DEFAULT_LINK_OFFSET;
1341 display->link_len = DP_DEFAULT_LINK_SIZE;
1342 display->p0_base = display->ahb_base + DP_DEFAULT_P0_OFFSET;
1343 display->p0_len = DP_DEFAULT_P0_SIZE;
1344
1345 return 0;
1346 }
1347
1348 display->link_base = msm_dp_ioremap(pdev, 2, &display->link_len);
1349 if (IS_ERR(display->link_base)) {
1350 DRM_ERROR("unable to remap link region: %pe\n", display->link_base);
1351 return PTR_ERR(display->link_base);
1352 }
1353
1354 display->p0_base = msm_dp_ioremap(pdev, 3, &display->p0_len);
1355 if (IS_ERR(display->p0_base)) {
1356 DRM_ERROR("unable to remap p0 region: %pe\n", display->p0_base);
1357 return PTR_ERR(display->p0_base);
1358 }
1359
1360 return 0;
1361 }
1362
msm_dp_display_probe(struct platform_device * pdev)1363 static int msm_dp_display_probe(struct platform_device *pdev)
1364 {
1365 int rc = 0;
1366 struct msm_dp_display_private *dp;
1367 const struct msm_dp_desc *desc;
1368
1369 if (!pdev || !pdev->dev.of_node) {
1370 DRM_ERROR("pdev not found\n");
1371 return -ENODEV;
1372 }
1373
1374 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1375 if (!dp)
1376 return -ENOMEM;
1377
1378 desc = msm_dp_display_get_desc(pdev);
1379 if (!desc)
1380 return -EINVAL;
1381
1382 dp->msm_dp_display.pdev = pdev;
1383 dp->id = desc->id;
1384 dp->msm_dp_display.connector_type = msm_dp_display_get_connector_type(pdev, desc);
1385 dp->wide_bus_supported = desc->wide_bus_supported;
1386 dp->msm_dp_display.is_edp =
1387 (dp->msm_dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
1388
1389 rc = msm_dp_display_get_io(dp);
1390 if (rc)
1391 return rc;
1392
1393 rc = msm_dp_init_sub_modules(dp);
1394 if (rc) {
1395 DRM_ERROR("init sub module failed\n");
1396 return -EPROBE_DEFER;
1397 }
1398
1399 /* setup event q */
1400 mutex_init(&dp->event_mutex);
1401 init_waitqueue_head(&dp->event_q);
1402 spin_lock_init(&dp->event_lock);
1403
1404 /* Store DP audio handle inside DP display */
1405 dp->msm_dp_display.msm_dp_audio = dp->audio;
1406
1407 init_completion(&dp->audio_comp);
1408
1409 platform_set_drvdata(pdev, &dp->msm_dp_display);
1410
1411 rc = devm_pm_runtime_enable(&pdev->dev);
1412 if (rc)
1413 goto err;
1414
1415 rc = msm_dp_display_request_irq(dp);
1416 if (rc)
1417 goto err;
1418
1419 if (dp->msm_dp_display.is_edp) {
1420 rc = devm_of_dp_aux_populate_bus(dp->aux, msm_dp_auxbus_done_probe);
1421 if (rc) {
1422 DRM_ERROR("eDP auxbus population failed, rc=%d\n", rc);
1423 goto err;
1424 }
1425 } else {
1426 rc = msm_dp_display_probe_tail(&pdev->dev);
1427 if (rc)
1428 goto err;
1429 }
1430
1431 return rc;
1432
1433 err:
1434 msm_dp_display_deinit_sub_modules(dp);
1435 return rc;
1436 }
1437
msm_dp_display_remove(struct platform_device * pdev)1438 static void msm_dp_display_remove(struct platform_device *pdev)
1439 {
1440 struct msm_dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
1441
1442 component_del(&pdev->dev, &msm_dp_display_comp_ops);
1443 msm_dp_display_deinit_sub_modules(dp);
1444 platform_set_drvdata(pdev, NULL);
1445 }
1446
msm_dp_pm_runtime_suspend(struct device * dev)1447 static int msm_dp_pm_runtime_suspend(struct device *dev)
1448 {
1449 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
1450
1451 disable_irq(dp->irq);
1452
1453 if (dp->msm_dp_display.is_edp) {
1454 msm_dp_display_host_phy_exit(dp);
1455 msm_dp_aux_hpd_disable(dp->aux);
1456 }
1457 msm_dp_display_host_deinit(dp);
1458
1459 return 0;
1460 }
1461
msm_dp_pm_runtime_resume(struct device * dev)1462 static int msm_dp_pm_runtime_resume(struct device *dev)
1463 {
1464 struct msm_dp_display_private *dp = dev_get_dp_display_private(dev);
1465
1466 /*
1467 * for eDP, host cotroller, HPD block and PHY are enabled here
1468 * but with HPD irq disabled
1469 *
1470 * for DP, only host controller is enabled here.
1471 * HPD block is enabled at msm_dp_bridge_hpd_enable()
1472 * PHY will be enabled at plugin handler later
1473 */
1474 msm_dp_display_host_init(dp);
1475 if (dp->msm_dp_display.is_edp) {
1476 msm_dp_aux_hpd_enable(dp->aux);
1477 msm_dp_display_host_phy_init(dp);
1478 }
1479
1480 enable_irq(dp->irq);
1481 return 0;
1482 }
1483
1484 static const struct dev_pm_ops msm_dp_pm_ops = {
1485 SET_RUNTIME_PM_OPS(msm_dp_pm_runtime_suspend, msm_dp_pm_runtime_resume, NULL)
1486 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1487 pm_runtime_force_resume)
1488 };
1489
1490 static struct platform_driver msm_dp_display_driver = {
1491 .probe = msm_dp_display_probe,
1492 .remove = msm_dp_display_remove,
1493 .driver = {
1494 .name = "msm-dp-display",
1495 .of_match_table = msm_dp_dt_match,
1496 .suppress_bind_attrs = true,
1497 .pm = &msm_dp_pm_ops,
1498 },
1499 };
1500
msm_dp_register(void)1501 int __init msm_dp_register(void)
1502 {
1503 int ret;
1504
1505 ret = platform_driver_register(&msm_dp_display_driver);
1506 if (ret)
1507 DRM_ERROR("Dp display driver register failed");
1508
1509 return ret;
1510 }
1511
msm_dp_unregister(void)1512 void __exit msm_dp_unregister(void)
1513 {
1514 platform_driver_unregister(&msm_dp_display_driver);
1515 }
1516
msm_dp_is_yuv_420_enabled(const struct msm_dp * msm_dp_display,const struct drm_display_mode * mode)1517 bool msm_dp_is_yuv_420_enabled(const struct msm_dp *msm_dp_display,
1518 const struct drm_display_mode *mode)
1519 {
1520 struct msm_dp_display_private *dp;
1521 const struct drm_display_info *info;
1522
1523 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1524 info = &msm_dp_display->connector->display_info;
1525
1526 return dp->panel->vsc_sdp_supported && drm_mode_is_420_only(info, mode);
1527 }
1528
msm_dp_needs_periph_flush(const struct msm_dp * msm_dp_display,const struct drm_display_mode * mode)1529 bool msm_dp_needs_periph_flush(const struct msm_dp *msm_dp_display,
1530 const struct drm_display_mode *mode)
1531 {
1532 return msm_dp_is_yuv_420_enabled(msm_dp_display, mode);
1533 }
1534
msm_dp_wide_bus_available(const struct msm_dp * msm_dp_display)1535 bool msm_dp_wide_bus_available(const struct msm_dp *msm_dp_display)
1536 {
1537 struct msm_dp_display_private *dp;
1538
1539 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1540
1541 if (dp->msm_dp_mode.out_fmt_is_yuv_420)
1542 return false;
1543
1544 return dp->wide_bus_supported;
1545 }
1546
msm_dp_display_debugfs_init(struct msm_dp * msm_dp_display,struct dentry * root,bool is_edp)1547 void msm_dp_display_debugfs_init(struct msm_dp *msm_dp_display, struct dentry *root, bool is_edp)
1548 {
1549 struct msm_dp_display_private *dp;
1550 struct device *dev;
1551 int rc;
1552
1553 dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1554 dev = &dp->msm_dp_display.pdev->dev;
1555
1556 rc = msm_dp_debug_init(dev, dp->panel, dp->link, dp->msm_dp_display.connector, root, is_edp);
1557 if (rc)
1558 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1559 }
1560
msm_dp_modeset_init(struct msm_dp * msm_dp_display,struct drm_device * dev,struct drm_encoder * encoder,bool yuv_supported)1561 int msm_dp_modeset_init(struct msm_dp *msm_dp_display, struct drm_device *dev,
1562 struct drm_encoder *encoder, bool yuv_supported)
1563 {
1564 struct msm_dp_display_private *msm_dp_priv;
1565 int ret;
1566
1567 msm_dp_display->drm_dev = dev;
1568
1569 msm_dp_priv = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1570
1571 ret = msm_dp_bridge_init(msm_dp_display, dev, encoder, yuv_supported);
1572 if (ret) {
1573 DRM_DEV_ERROR(dev->dev,
1574 "failed to create dp bridge: %d\n", ret);
1575 return ret;
1576 }
1577
1578 msm_dp_display->connector = msm_dp_drm_connector_init(msm_dp_display, encoder);
1579 if (IS_ERR(msm_dp_display->connector)) {
1580 ret = PTR_ERR(msm_dp_display->connector);
1581 DRM_DEV_ERROR(dev->dev,
1582 "failed to create dp connector: %d\n", ret);
1583 msm_dp_display->connector = NULL;
1584 return ret;
1585 }
1586
1587 msm_dp_priv->panel->connector = msm_dp_display->connector;
1588
1589 return 0;
1590 }
1591
msm_dp_bridge_atomic_enable(struct drm_bridge * drm_bridge,struct drm_atomic_state * state)1592 void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
1593 struct drm_atomic_state *state)
1594 {
1595 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1596 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1597 int rc = 0;
1598 struct msm_dp_display_private *msm_dp_display;
1599 u32 hpd_state;
1600 bool force_link_train = false;
1601
1602 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1603 if (!msm_dp_display->msm_dp_mode.drm_mode.clock) {
1604 DRM_ERROR("invalid params\n");
1605 return;
1606 }
1607
1608 if (dp->is_edp)
1609 msm_dp_hpd_plug_handle(msm_dp_display, 0);
1610
1611 mutex_lock(&msm_dp_display->event_mutex);
1612 if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
1613 DRM_ERROR("failed to pm_runtime_resume\n");
1614 mutex_unlock(&msm_dp_display->event_mutex);
1615 return;
1616 }
1617
1618 hpd_state = msm_dp_display->hpd_state;
1619 if (hpd_state != ST_DISPLAY_OFF && hpd_state != ST_MAINLINK_READY) {
1620 mutex_unlock(&msm_dp_display->event_mutex);
1621 return;
1622 }
1623
1624 rc = msm_dp_display_set_mode(dp, &msm_dp_display->msm_dp_mode);
1625 if (rc) {
1626 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1627 mutex_unlock(&msm_dp_display->event_mutex);
1628 return;
1629 }
1630
1631 hpd_state = msm_dp_display->hpd_state;
1632
1633 if (hpd_state == ST_DISPLAY_OFF) {
1634 msm_dp_display_host_phy_init(msm_dp_display);
1635 force_link_train = true;
1636 }
1637
1638 msm_dp_display_enable(msm_dp_display, force_link_train);
1639
1640 rc = msm_dp_display_post_enable(dp);
1641 if (rc) {
1642 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1643 msm_dp_display_disable(msm_dp_display);
1644 }
1645
1646 /* completed connection */
1647 msm_dp_display->hpd_state = ST_CONNECTED;
1648
1649 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1650 mutex_unlock(&msm_dp_display->event_mutex);
1651 }
1652
msm_dp_bridge_atomic_disable(struct drm_bridge * drm_bridge,struct drm_atomic_state * state)1653 void msm_dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
1654 struct drm_atomic_state *state)
1655 {
1656 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1657 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1658 struct msm_dp_display_private *msm_dp_display;
1659
1660 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1661
1662 msm_dp_ctrl_push_idle(msm_dp_display->ctrl);
1663 }
1664
msm_dp_bridge_atomic_post_disable(struct drm_bridge * drm_bridge,struct drm_atomic_state * state)1665 void msm_dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
1666 struct drm_atomic_state *state)
1667 {
1668 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1669 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1670 u32 hpd_state;
1671 struct msm_dp_display_private *msm_dp_display;
1672
1673 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1674
1675 if (dp->is_edp)
1676 msm_dp_hpd_unplug_handle(msm_dp_display, 0);
1677
1678 mutex_lock(&msm_dp_display->event_mutex);
1679
1680 hpd_state = msm_dp_display->hpd_state;
1681 if (hpd_state != ST_DISCONNECT_PENDING && hpd_state != ST_CONNECTED)
1682 drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
1683 dp->connector_type, hpd_state);
1684
1685 msm_dp_display_disable(msm_dp_display);
1686
1687 hpd_state = msm_dp_display->hpd_state;
1688 if (hpd_state == ST_DISCONNECT_PENDING) {
1689 /* completed disconnection */
1690 msm_dp_display->hpd_state = ST_DISCONNECTED;
1691 } else {
1692 msm_dp_display->hpd_state = ST_DISPLAY_OFF;
1693 }
1694
1695 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1696
1697 pm_runtime_put_sync(&dp->pdev->dev);
1698 mutex_unlock(&msm_dp_display->event_mutex);
1699 }
1700
msm_dp_bridge_mode_set(struct drm_bridge * drm_bridge,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)1701 void msm_dp_bridge_mode_set(struct drm_bridge *drm_bridge,
1702 const struct drm_display_mode *mode,
1703 const struct drm_display_mode *adjusted_mode)
1704 {
1705 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
1706 struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
1707 struct msm_dp_display_private *msm_dp_display;
1708 struct msm_dp_panel *msm_dp_panel;
1709
1710 msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
1711 msm_dp_panel = msm_dp_display->panel;
1712
1713 memset(&msm_dp_display->msm_dp_mode, 0x0, sizeof(struct msm_dp_display_mode));
1714
1715 if (msm_dp_display_check_video_test(dp))
1716 msm_dp_display->msm_dp_mode.bpp = msm_dp_display_get_test_bpp(dp);
1717 else /* Default num_components per pixel = 3 */
1718 msm_dp_display->msm_dp_mode.bpp = dp->connector->display_info.bpc * 3;
1719
1720 if (!msm_dp_display->msm_dp_mode.bpp)
1721 msm_dp_display->msm_dp_mode.bpp = 24; /* Default bpp */
1722
1723 drm_mode_copy(&msm_dp_display->msm_dp_mode.drm_mode, adjusted_mode);
1724
1725 msm_dp_display->msm_dp_mode.v_active_low =
1726 !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1727
1728 msm_dp_display->msm_dp_mode.h_active_low =
1729 !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1730
1731 msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 =
1732 drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) &&
1733 msm_dp_panel->vsc_sdp_supported;
1734
1735 /* populate wide_bus_support to different layers */
1736 msm_dp_display->ctrl->wide_bus_en =
1737 msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
1738 }
1739
msm_dp_bridge_hpd_enable(struct drm_bridge * bridge)1740 void msm_dp_bridge_hpd_enable(struct drm_bridge *bridge)
1741 {
1742 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge);
1743 struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display;
1744 struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1745
1746 /*
1747 * this is for external DP with hpd irq enabled case,
1748 * step-1: msm_dp_pm_runtime_resume() enable dp host only
1749 * step-2: enable hdp block and have hpd irq enabled here
1750 * step-3: waiting for plugin irq while phy is not initialized
1751 * step-4: DP PHY is initialized at plugin handler before link training
1752 *
1753 */
1754 mutex_lock(&dp->event_mutex);
1755 if (pm_runtime_resume_and_get(&msm_dp_display->pdev->dev)) {
1756 DRM_ERROR("failed to resume power\n");
1757 mutex_unlock(&dp->event_mutex);
1758 return;
1759 }
1760
1761 msm_dp_aux_hpd_enable(dp->aux);
1762 msm_dp_aux_hpd_intr_enable(dp->aux);
1763
1764 msm_dp_display->internal_hpd = true;
1765 mutex_unlock(&dp->event_mutex);
1766 }
1767
msm_dp_bridge_hpd_disable(struct drm_bridge * bridge)1768 void msm_dp_bridge_hpd_disable(struct drm_bridge *bridge)
1769 {
1770 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge);
1771 struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display;
1772 struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1773
1774 mutex_lock(&dp->event_mutex);
1775
1776 msm_dp_aux_hpd_intr_disable(dp->aux);
1777 msm_dp_aux_hpd_disable(dp->aux);
1778
1779 msm_dp_display->internal_hpd = false;
1780
1781 pm_runtime_put_sync(&msm_dp_display->pdev->dev);
1782 mutex_unlock(&dp->event_mutex);
1783 }
1784
msm_dp_bridge_hpd_notify(struct drm_bridge * bridge,enum drm_connector_status status)1785 void msm_dp_bridge_hpd_notify(struct drm_bridge *bridge,
1786 enum drm_connector_status status)
1787 {
1788 struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge);
1789 struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display;
1790 struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
1791
1792 /* Without next_bridge interrupts are handled by the DP core directly */
1793 if (msm_dp_display->internal_hpd)
1794 return;
1795
1796 if (!msm_dp_display->link_ready && status == connector_status_connected)
1797 msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1798 else if (msm_dp_display->link_ready && status == connector_status_disconnected)
1799 msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1800 }
1801