1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
6 #include <linux/module.h>
7 #include <linux/slab.h>
8 #include <linux/uaccess.h>
9 #include <linux/debugfs.h>
10 #include <linux/component.h>
11 #include <linux/of_irq.h>
12 #include <linux/delay.h>
17 #include "dp_parser.h"
19 #include "dp_catalog.h"
25 #include "dp_display.h"
30 static struct msm_dp *g_dp_display;
31 #define HPD_STRING_SIZE 30
38 ISR_IRQ_HPD_PULSE_COUNT,
39 ISR_HPD_LO_GLITH_COUNT,
42 /* event thread connection state */
47 ST_DISCONNECT_PENDING,
61 EV_CONNECT_PENDING_TIMEOUT,
62 EV_DISCONNECT_PENDING_TIMEOUT,
65 #define EVENT_TIMEOUT (HZ/10) /* 100ms */
66 #define DP_EVENT_Q_MAX 8
68 #define DP_TIMEOUT_5_SECOND (5000/EVENT_TIMEOUT)
69 #define DP_TIMEOUT_NONE 0
71 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
79 struct dp_display_private {
84 bool core_initialized;
88 struct platform_device *pdev;
91 struct dp_usbpd *usbpd;
92 struct dp_parser *parser;
93 struct dp_power *power;
94 struct dp_catalog *catalog;
95 struct drm_dp_aux *aux;
97 struct dp_panel *panel;
99 struct dp_debug *debug;
101 struct dp_usbpd_cb usbpd_cb;
102 struct dp_display_mode dp_mode;
103 struct msm_dp dp_display;
105 bool encoder_mode_set;
107 /* wait for audio signaling */
108 struct completion audio_comp;
110 /* event related only access by event thread */
111 struct mutex event_mutex;
112 wait_queue_head_t event_q;
116 struct dp_event event_list[DP_EVENT_Q_MAX];
117 spinlock_t event_lock;
119 struct dp_audio *audio;
122 static const struct of_device_id dp_dt_match[] = {
123 {.compatible = "qcom,sc7180-dp"},
127 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
131 struct dp_event *todo;
134 spin_lock_irqsave(&dp_priv->event_lock, flag);
135 pndx = dp_priv->event_pndx + 1;
136 pndx %= DP_EVENT_Q_MAX;
137 if (pndx == dp_priv->event_gndx) {
138 pr_err("event_q is full: pndx=%d gndx=%d\n",
139 dp_priv->event_pndx, dp_priv->event_gndx);
140 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
143 todo = &dp_priv->event_list[dp_priv->event_pndx++];
144 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
145 todo->event_id = event;
148 wake_up(&dp_priv->event_q);
149 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
154 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
157 struct dp_event *todo;
160 spin_lock_irqsave(&dp_priv->event_lock, flag);
161 if (dp_priv->event_pndx == dp_priv->event_gndx) {
162 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
166 gndx = dp_priv->event_gndx;
167 while (dp_priv->event_pndx != gndx) {
168 todo = &dp_priv->event_list[gndx];
169 if (todo->event_id == event) {
170 todo->event_id = EV_NO_EVENT; /* deleted */
174 gndx %= DP_EVENT_Q_MAX;
176 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
181 void dp_display_signal_audio_start(struct msm_dp *dp_display)
183 struct dp_display_private *dp;
185 dp = container_of(dp_display, struct dp_display_private, dp_display);
187 reinit_completion(&dp->audio_comp);
190 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
192 struct dp_display_private *dp;
194 dp = container_of(dp_display, struct dp_display_private, dp_display);
196 complete_all(&dp->audio_comp);
199 static int dp_display_bind(struct device *dev, struct device *master,
203 struct dp_display_private *dp;
204 struct drm_device *drm;
205 struct msm_drm_private *priv;
207 drm = dev_get_drvdata(master);
209 dp = container_of(g_dp_display,
210 struct dp_display_private, dp_display);
212 dp->dp_display.drm_dev = drm;
213 priv = drm->dev_private;
214 priv->dp = &(dp->dp_display);
216 rc = dp->parser->parse(dp->parser);
218 DRM_ERROR("device tree parsing failed\n");
222 dp->aux->drm_dev = drm;
223 rc = dp_aux_register(dp->aux);
225 DRM_ERROR("DRM DP AUX register failed\n");
229 rc = dp_power_client_init(dp->power);
231 DRM_ERROR("Power client create failed\n");
235 rc = dp_register_audio_driver(dev, dp->audio);
237 DRM_ERROR("Audio registration Dp failed\n");
243 static void dp_display_unbind(struct device *dev, struct device *master,
246 struct dp_display_private *dp;
247 struct drm_device *drm = dev_get_drvdata(master);
248 struct msm_drm_private *priv = drm->dev_private;
250 dp = container_of(g_dp_display,
251 struct dp_display_private, dp_display);
253 dp_power_client_deinit(dp->power);
254 dp_aux_unregister(dp->aux);
258 static const struct component_ops dp_display_comp_ops = {
259 .bind = dp_display_bind,
260 .unbind = dp_display_unbind,
263 static bool dp_display_is_ds_bridge(struct dp_panel *panel)
265 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
266 DP_DWN_STRM_PORT_PRESENT);
269 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
271 return dp_display_is_ds_bridge(dp->panel) &&
272 (dp->link->sink_count == 0);
275 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
277 struct dp_display_private *dp;
278 struct drm_connector *connector;
280 dp = container_of(dp_display, struct dp_display_private, dp_display);
282 connector = dp->dp_display.connector;
283 drm_helper_hpd_irq_event(connector->dev);
287 static void dp_display_set_encoder_mode(struct dp_display_private *dp)
289 struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private;
290 struct msm_kms *kms = priv->kms;
292 if (!dp->encoder_mode_set && dp->dp_display.encoder &&
293 kms->funcs->set_encoder_mode) {
294 kms->funcs->set_encoder_mode(kms,
295 dp->dp_display.encoder, false);
297 dp->encoder_mode_set = true;
301 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
304 if ((hpd && dp->dp_display.is_connected) ||
305 (!hpd && !dp->dp_display.is_connected)) {
306 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
310 /* reset video pattern flag on disconnect */
312 dp->panel->video_test = false;
314 dp->dp_display.is_connected = hpd;
316 dp_display_send_hpd_event(&dp->dp_display);
321 static int dp_display_process_hpd_high(struct dp_display_private *dp)
326 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
328 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
332 dp_link_process_request(dp->link);
334 edid = dp->panel->edid;
336 dp->audio_supported = drm_detect_monitor_audio(edid);
337 dp_panel_handle_sink_request(dp->panel);
339 dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
340 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
343 * set sink to normal operation mode -- D0
346 dp_link_psm_config(dp->link, &dp->panel->link_info, false);
348 dp_link_reset_phy_params_vx_px(dp->link);
349 rc = dp_ctrl_on_link(dp->ctrl);
351 DRM_ERROR("failed to complete DP link training\n");
355 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
361 static void dp_display_host_init(struct dp_display_private *dp, int reset)
365 if (dp->core_initialized) {
366 DRM_DEBUG_DP("DP core already initialized\n");
370 if (dp->usbpd->orientation == ORIENTATION_CC2)
373 dp_display_set_encoder_mode(dp);
375 dp_power_init(dp->power, flip);
376 dp_ctrl_host_init(dp->ctrl, flip, reset);
377 dp_aux_init(dp->aux);
378 dp->core_initialized = true;
381 static void dp_display_host_deinit(struct dp_display_private *dp)
383 if (!dp->core_initialized) {
384 DRM_DEBUG_DP("DP core not initialized\n");
388 dp_ctrl_host_deinit(dp->ctrl);
389 dp_aux_deinit(dp->aux);
390 dp_power_deinit(dp->power);
392 dp->core_initialized = false;
395 static int dp_display_usbpd_configure_cb(struct device *dev)
398 struct dp_display_private *dp;
401 DRM_ERROR("invalid dev\n");
406 dp = container_of(g_dp_display,
407 struct dp_display_private, dp_display);
409 dp_display_host_init(dp, false);
411 rc = dp_display_process_hpd_high(dp);
416 static int dp_display_usbpd_disconnect_cb(struct device *dev)
419 struct dp_display_private *dp;
422 DRM_ERROR("invalid dev\n");
427 dp = container_of(g_dp_display,
428 struct dp_display_private, dp_display);
430 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
435 static void dp_display_handle_video_request(struct dp_display_private *dp)
437 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
438 dp->panel->video_test = true;
439 dp_link_send_test_response(dp->link);
443 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
447 if (dp_display_is_sink_count_zero(dp)) {
448 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
449 if (dp->hpd_state != ST_DISCONNECTED) {
450 dp->hpd_state = ST_DISCONNECT_PENDING;
451 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
454 if (dp->hpd_state == ST_DISCONNECTED) {
455 dp->hpd_state = ST_CONNECT_PENDING;
456 rc = dp_display_process_hpd_high(dp);
458 dp->hpd_state = ST_DISCONNECTED;
465 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
467 u32 sink_request = dp->link->sink_request;
469 if (dp->hpd_state == ST_DISCONNECTED) {
470 if (sink_request & DP_LINK_STATUS_UPDATED) {
471 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
476 dp_ctrl_handle_sink_request(dp->ctrl);
478 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
479 dp_display_handle_video_request(dp);
484 static int dp_display_usbpd_attention_cb(struct device *dev)
488 struct dp_display_private *dp;
491 DRM_ERROR("invalid dev\n");
495 dp = container_of(g_dp_display,
496 struct dp_display_private, dp_display);
498 /* check for any test request issued by sink */
499 rc = dp_link_process_request(dp->link);
501 sink_request = dp->link->sink_request;
502 if (sink_request & DS_PORT_STATUS_CHANGED)
503 rc = dp_display_handle_port_ststus_changed(dp);
505 rc = dp_display_handle_irq_hpd(dp);
511 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
513 struct dp_usbpd *hpd = dp->usbpd;
515 u32 tout = DP_TIMEOUT_5_SECOND;
521 mutex_lock(&dp->event_mutex);
523 state = dp->hpd_state;
524 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
525 mutex_unlock(&dp->event_mutex);
529 if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
530 mutex_unlock(&dp->event_mutex);
534 if (state == ST_DISCONNECT_PENDING) {
535 /* wait until ST_DISCONNECTED */
536 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
537 mutex_unlock(&dp->event_mutex);
541 dp->hpd_state = ST_CONNECT_PENDING;
545 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
546 if (ret) { /* link train failed */
548 dp->hpd_state = ST_DISCONNECTED;
550 if (ret == -ECONNRESET) { /* cable unplugged */
551 dp->core_initialized = false;
555 /* start sentinel checking in case of missing uevent */
556 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
559 /* enable HDP irq_hpd/replug interrupt */
560 dp_catalog_hpd_config_intr(dp->catalog,
561 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);
563 mutex_unlock(&dp->event_mutex);
565 /* uevent will complete connection part */
569 static int dp_display_enable(struct dp_display_private *dp, u32 data);
570 static int dp_display_disable(struct dp_display_private *dp, u32 data);
572 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
576 mutex_lock(&dp->event_mutex);
578 state = dp->hpd_state;
579 if (state == ST_CONNECT_PENDING)
580 dp->hpd_state = ST_CONNECTED;
582 mutex_unlock(&dp->event_mutex);
587 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
590 struct dp_display_private *dp;
592 dp = container_of(dp_display,
593 struct dp_display_private, dp_display);
595 /* notify audio subsystem only if sink supports audio */
596 if (dp_display->plugged_cb && dp_display->codec_dev &&
598 dp_display->plugged_cb(dp_display->codec_dev, plugged);
601 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
603 struct dp_usbpd *hpd = dp->usbpd;
609 mutex_lock(&dp->event_mutex);
611 state = dp->hpd_state;
613 /* disable irq_hpd/replug interrupts */
614 dp_catalog_hpd_config_intr(dp->catalog,
615 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);
617 /* unplugged, no more irq_hpd handle */
618 dp_del_event(dp, EV_IRQ_HPD_INT);
620 if (state == ST_DISCONNECTED) {
621 /* triggered by irq_hdp with sink_count = 0 */
622 if (dp->link->sink_count == 0) {
623 dp_ctrl_off_phy(dp->ctrl);
625 dp->core_initialized = false;
627 mutex_unlock(&dp->event_mutex);
631 if (state == ST_DISCONNECT_PENDING) {
632 mutex_unlock(&dp->event_mutex);
636 if (state == ST_CONNECT_PENDING) {
637 /* wait until CONNECTED */
638 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
639 mutex_unlock(&dp->event_mutex);
643 dp->hpd_state = ST_DISCONNECT_PENDING;
645 /* disable HPD plug interrupts */
646 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
651 * We don't need separate work for disconnect as
652 * connect/attention interrupts are disabled
654 dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
656 /* start sentinel checking in case of missing uevent */
657 dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
659 /* signal the disconnect event early to ensure proper teardown */
660 dp_display_handle_plugged_change(g_dp_display, false);
662 /* enable HDP plug interrupt to prepare for next plugin */
663 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
665 /* uevent will complete disconnection part */
666 mutex_unlock(&dp->event_mutex);
670 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
674 mutex_lock(&dp->event_mutex);
676 state = dp->hpd_state;
677 if (state == ST_DISCONNECT_PENDING)
678 dp->hpd_state = ST_DISCONNECTED;
680 mutex_unlock(&dp->event_mutex);
685 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
690 mutex_lock(&dp->event_mutex);
692 /* irq_hpd can happen at either connected or disconnected state */
693 state = dp->hpd_state;
694 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
695 mutex_unlock(&dp->event_mutex);
699 if (state == ST_CONNECT_PENDING) {
700 /* wait until ST_CONNECTED */
701 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
702 mutex_unlock(&dp->event_mutex);
706 if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
707 /* wait until ST_CONNECTED */
708 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
709 mutex_unlock(&dp->event_mutex);
713 ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
714 if (ret == -ECONNRESET) { /* cable unplugged */
715 dp->core_initialized = false;
718 mutex_unlock(&dp->event_mutex);
723 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
725 dp_debug_put(dp->debug);
726 dp_panel_put(dp->panel);
728 dp_audio_put(dp->audio);
731 static int dp_init_sub_modules(struct dp_display_private *dp)
734 struct device *dev = &dp->pdev->dev;
735 struct dp_usbpd_cb *cb = &dp->usbpd_cb;
736 struct dp_panel_in panel_in = {
740 /* Callback APIs used for cable status change event */
741 cb->configure = dp_display_usbpd_configure_cb;
742 cb->disconnect = dp_display_usbpd_disconnect_cb;
743 cb->attention = dp_display_usbpd_attention_cb;
745 dp->usbpd = dp_hpd_get(dev, cb);
746 if (IS_ERR(dp->usbpd)) {
747 rc = PTR_ERR(dp->usbpd);
748 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
753 dp->parser = dp_parser_get(dp->pdev);
754 if (IS_ERR(dp->parser)) {
755 rc = PTR_ERR(dp->parser);
756 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
761 dp->catalog = dp_catalog_get(dev, &dp->parser->io);
762 if (IS_ERR(dp->catalog)) {
763 rc = PTR_ERR(dp->catalog);
764 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
769 dp->power = dp_power_get(dev, dp->parser);
770 if (IS_ERR(dp->power)) {
771 rc = PTR_ERR(dp->power);
772 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
777 dp->aux = dp_aux_get(dev, dp->catalog);
778 if (IS_ERR(dp->aux)) {
779 rc = PTR_ERR(dp->aux);
780 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
785 dp->link = dp_link_get(dev, dp->aux);
786 if (IS_ERR(dp->link)) {
787 rc = PTR_ERR(dp->link);
788 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
793 panel_in.aux = dp->aux;
794 panel_in.catalog = dp->catalog;
795 panel_in.link = dp->link;
797 dp->panel = dp_panel_get(&panel_in);
798 if (IS_ERR(dp->panel)) {
799 rc = PTR_ERR(dp->panel);
800 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
805 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
806 dp->power, dp->catalog, dp->parser);
807 if (IS_ERR(dp->ctrl)) {
808 rc = PTR_ERR(dp->ctrl);
809 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
814 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
815 if (IS_ERR(dp->audio)) {
816 rc = PTR_ERR(dp->audio);
817 pr_err("failed to initialize audio, rc = %d\n", rc);
825 dp_panel_put(dp->panel);
832 static int dp_display_set_mode(struct msm_dp *dp_display,
833 struct dp_display_mode *mode)
835 struct dp_display_private *dp;
837 dp = container_of(dp_display, struct dp_display_private, dp_display);
839 dp->panel->dp_mode.drm_mode = mode->drm_mode;
840 dp->panel->dp_mode.bpp = mode->bpp;
841 dp->panel->dp_mode.capabilities = mode->capabilities;
842 dp_panel_init_panel_info(dp->panel);
846 static int dp_display_prepare(struct msm_dp *dp)
851 static int dp_display_enable(struct dp_display_private *dp, u32 data)
854 struct msm_dp *dp_display;
856 dp_display = g_dp_display;
858 if (dp_display->power_on) {
859 DRM_DEBUG_DP("Link already setup, return\n");
863 rc = dp_ctrl_on_stream(dp->ctrl);
865 dp_display->power_on = true;
870 static int dp_display_post_enable(struct msm_dp *dp_display)
872 struct dp_display_private *dp;
875 dp = container_of(dp_display, struct dp_display_private, dp_display);
877 rate = dp->link->link_params.rate;
879 if (dp->audio_supported) {
880 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
881 dp->audio->lane_count = dp->link->link_params.num_lanes;
884 /* signal the connect event late to synchronize video and display */
885 dp_display_handle_plugged_change(dp_display, true);
889 static int dp_display_disable(struct dp_display_private *dp, u32 data)
891 struct msm_dp *dp_display;
893 dp_display = g_dp_display;
895 if (!dp_display->power_on)
898 /* wait only if audio was enabled */
899 if (dp_display->audio_enabled) {
900 /* signal the disconnect event */
901 dp_display_handle_plugged_change(dp_display, false);
902 if (!wait_for_completion_timeout(&dp->audio_comp,
904 DRM_ERROR("audio comp timeout\n");
907 dp_display->audio_enabled = false;
909 /* triggered by irq_hpd with sink_count = 0 */
910 if (dp->link->sink_count == 0) {
911 dp_ctrl_off_link_stream(dp->ctrl);
913 dp_ctrl_off(dp->ctrl);
914 dp->core_initialized = false;
917 dp_display->power_on = false;
922 static int dp_display_unprepare(struct msm_dp *dp)
927 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
928 hdmi_codec_plugged_cb fn, struct device *codec_dev)
932 dp_display->plugged_cb = fn;
933 dp_display->codec_dev = codec_dev;
934 plugged = dp_display->is_connected;
935 dp_display_handle_plugged_change(dp_display, plugged);
940 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
942 const u32 num_components = 3, default_bpp = 24;
943 struct dp_display_private *dp_display;
944 struct dp_link_info *link_info;
945 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
947 if (!dp || !mode_pclk_khz || !dp->connector) {
948 DRM_ERROR("invalid params\n");
952 dp_display = container_of(dp, struct dp_display_private, dp_display);
953 link_info = &dp_display->panel->link_info;
955 mode_bpp = dp->connector->display_info.bpc * num_components;
957 mode_bpp = default_bpp;
959 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
960 mode_bpp, mode_pclk_khz);
962 mode_rate_khz = mode_pclk_khz * mode_bpp;
963 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
965 if (mode_rate_khz > supported_rate_khz)
971 int dp_display_get_modes(struct msm_dp *dp,
972 struct dp_display_mode *dp_mode)
974 struct dp_display_private *dp_display;
978 DRM_ERROR("invalid params\n");
982 dp_display = container_of(dp, struct dp_display_private, dp_display);
984 ret = dp_panel_get_modes(dp_display->panel,
985 dp->connector, dp_mode);
986 if (dp_mode->drm_mode.clock)
987 dp->max_pclk_khz = dp_mode->drm_mode.clock;
991 bool dp_display_check_video_test(struct msm_dp *dp)
993 struct dp_display_private *dp_display;
995 dp_display = container_of(dp, struct dp_display_private, dp_display);
997 return dp_display->panel->video_test;
1000 int dp_display_get_test_bpp(struct msm_dp *dp)
1002 struct dp_display_private *dp_display;
1005 DRM_ERROR("invalid params\n");
1009 dp_display = container_of(dp, struct dp_display_private, dp_display);
1011 return dp_link_bit_depth_to_bpp(
1012 dp_display->link->test_video.test_bit_depth);
1015 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
1017 struct dp_display_private *dp_display;
1018 struct drm_device *drm;
1020 dp_display = container_of(dp, struct dp_display_private, dp_display);
1024 * if we are reading registers we need the link clocks to be on
1025 * however till DP cable is connected this will not happen as we
1026 * do not know the resolution to power up with. Hence check the
1027 * power_on status before dumping DP registers to avoid crash due
1028 * to unclocked access
1030 mutex_lock(&dp_display->event_mutex);
1032 if (!dp->power_on) {
1033 mutex_unlock(&dp_display->event_mutex);
1037 dp_catalog_snapshot(dp_display->catalog, disp_state);
1039 mutex_unlock(&dp_display->event_mutex);
1042 static void dp_display_config_hpd(struct dp_display_private *dp)
1045 dp_display_host_init(dp, true);
1046 dp_catalog_ctrl_hpd_config(dp->catalog);
1048 /* Enable interrupt first time
1049 * we are leaving dp clocks on during disconnect
1050 * and never disable interrupt
1052 enable_irq(dp->irq);
1055 static int hpd_event_thread(void *data)
1057 struct dp_display_private *dp_priv;
1059 struct dp_event *todo;
1060 int timeout_mode = 0;
1062 dp_priv = (struct dp_display_private *)data;
1066 wait_event_timeout(dp_priv->event_q,
1067 (dp_priv->event_pndx == dp_priv->event_gndx),
1070 wait_event_interruptible(dp_priv->event_q,
1071 (dp_priv->event_pndx != dp_priv->event_gndx));
1073 spin_lock_irqsave(&dp_priv->event_lock, flag);
1074 todo = &dp_priv->event_list[dp_priv->event_gndx];
1076 struct dp_event *todo_next;
1078 dp_priv->event_gndx++;
1079 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1081 /* re enter delay event into q */
1082 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1083 dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1084 todo_next->event_id = todo->event_id;
1085 todo_next->data = todo->data;
1086 todo_next->delay = todo->delay - 1;
1088 /* clean up older event */
1089 todo->event_id = EV_NO_EVENT;
1092 /* switch to timeout mode */
1094 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1098 /* timeout with no events in q */
1099 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1100 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1104 dp_priv->event_gndx++;
1105 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1107 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1109 switch (todo->event_id) {
1110 case EV_HPD_INIT_SETUP:
1111 dp_display_config_hpd(dp_priv);
1113 case EV_HPD_PLUG_INT:
1114 dp_hpd_plug_handle(dp_priv, todo->data);
1116 case EV_HPD_UNPLUG_INT:
1117 dp_hpd_unplug_handle(dp_priv, todo->data);
1119 case EV_IRQ_HPD_INT:
1120 dp_irq_hpd_handle(dp_priv, todo->data);
1122 case EV_HPD_REPLUG_INT:
1125 case EV_USER_NOTIFICATION:
1126 dp_display_send_hpd_notification(dp_priv,
1129 case EV_CONNECT_PENDING_TIMEOUT:
1130 dp_connect_pending_timeout(dp_priv,
1133 case EV_DISCONNECT_PENDING_TIMEOUT:
1134 dp_disconnect_pending_timeout(dp_priv,
1145 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1147 init_waitqueue_head(&dp_priv->event_q);
1148 spin_lock_init(&dp_priv->event_lock);
1150 kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1153 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1155 struct dp_display_private *dp = dev_id;
1156 irqreturn_t ret = IRQ_HANDLED;
1160 DRM_ERROR("invalid data\n");
1164 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1166 if (hpd_isr_status & 0x0F) {
1167 /* hpd related interrupts */
1168 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1169 hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1170 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1173 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1174 /* stop sentinel connect pending checking */
1175 dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1176 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1179 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1180 dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1182 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1183 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1186 /* DP controller isr */
1187 dp_ctrl_isr(dp->ctrl);
1190 dp_aux_isr(dp->aux);
1195 int dp_display_request_irq(struct msm_dp *dp_display)
1198 struct dp_display_private *dp;
1201 DRM_ERROR("invalid input\n");
1205 dp = container_of(dp_display, struct dp_display_private, dp_display);
1207 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1210 DRM_ERROR("failed to get irq: %d\n", rc);
1214 rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1215 dp_display_irq_handler,
1216 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1218 DRM_ERROR("failed to request IRQ%u: %d\n",
1222 disable_irq(dp->irq);
1227 static int dp_display_probe(struct platform_device *pdev)
1230 struct dp_display_private *dp;
1232 if (!pdev || !pdev->dev.of_node) {
1233 DRM_ERROR("pdev not found\n");
1237 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1242 dp->name = "drm_dp";
1244 rc = dp_init_sub_modules(dp);
1246 DRM_ERROR("init sub module failed\n");
1247 return -EPROBE_DEFER;
1250 mutex_init(&dp->event_mutex);
1251 g_dp_display = &dp->dp_display;
1253 /* Store DP audio handle inside DP display */
1254 g_dp_display->dp_audio = dp->audio;
1256 init_completion(&dp->audio_comp);
1258 platform_set_drvdata(pdev, g_dp_display);
1260 rc = component_add(&pdev->dev, &dp_display_comp_ops);
1262 DRM_ERROR("component add failed, rc=%d\n", rc);
1263 dp_display_deinit_sub_modules(dp);
1269 static int dp_display_remove(struct platform_device *pdev)
1271 struct dp_display_private *dp;
1273 dp = container_of(g_dp_display,
1274 struct dp_display_private, dp_display);
1276 dp_display_deinit_sub_modules(dp);
1278 component_del(&pdev->dev, &dp_display_comp_ops);
1279 platform_set_drvdata(pdev, NULL);
1284 static int dp_pm_resume(struct device *dev)
1286 struct platform_device *pdev = to_platform_device(dev);
1287 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1288 struct dp_display_private *dp;
1291 dp = container_of(dp_display, struct dp_display_private, dp_display);
1293 mutex_lock(&dp->event_mutex);
1295 /* start from disconnected state */
1296 dp->hpd_state = ST_DISCONNECTED;
1298 /* turn on dp ctrl/phy */
1299 dp_display_host_init(dp, true);
1301 dp_catalog_ctrl_hpd_config(dp->catalog);
1303 status = dp_catalog_link_is_connected(dp->catalog);
1306 * can not declared display is connected unless
1307 * HDMI cable is plugged in and sink_count of
1310 if (status && dp->link->sink_count)
1311 dp->dp_display.is_connected = true;
1313 dp->dp_display.is_connected = false;
1315 dp_display_handle_plugged_change(g_dp_display,
1316 dp->dp_display.is_connected);
1319 mutex_unlock(&dp->event_mutex);
1324 static int dp_pm_suspend(struct device *dev)
1326 struct platform_device *pdev = to_platform_device(dev);
1327 struct msm_dp *dp_display = platform_get_drvdata(pdev);
1328 struct dp_display_private *dp;
1330 dp = container_of(dp_display, struct dp_display_private, dp_display);
1332 mutex_lock(&dp->event_mutex);
1334 if (dp->core_initialized == true) {
1335 /* mainlink enabled */
1336 if (dp_power_clk_status(dp->power, DP_CTRL_PM))
1337 dp_ctrl_off_link_stream(dp->ctrl);
1339 dp_display_host_deinit(dp);
1342 dp->hpd_state = ST_SUSPENDED;
1344 /* host_init will be called at pm_resume */
1345 dp->core_initialized = false;
1347 mutex_unlock(&dp->event_mutex);
1352 static int dp_pm_prepare(struct device *dev)
1357 static void dp_pm_complete(struct device *dev)
1362 static const struct dev_pm_ops dp_pm_ops = {
1363 .suspend = dp_pm_suspend,
1364 .resume = dp_pm_resume,
1365 .prepare = dp_pm_prepare,
1366 .complete = dp_pm_complete,
1369 static struct platform_driver dp_display_driver = {
1370 .probe = dp_display_probe,
1371 .remove = dp_display_remove,
1373 .name = "msm-dp-display",
1374 .of_match_table = dp_dt_match,
1375 .suppress_bind_attrs = true,
1380 int __init msm_dp_register(void)
1384 ret = platform_driver_register(&dp_display_driver);
1386 DRM_ERROR("Dp display driver register failed");
1391 void __exit msm_dp_unregister(void)
1393 platform_driver_unregister(&dp_display_driver);
1396 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1398 struct dp_display_private *dp;
1403 dp = container_of(dp_display, struct dp_display_private, dp_display);
1405 dp_hpd_event_setup(dp);
1407 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1410 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1412 struct dp_display_private *dp;
1416 dp = container_of(dp_display, struct dp_display_private, dp_display);
1417 dev = &dp->pdev->dev;
1419 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1420 dp->link, &dp->dp_display.connector,
1422 if (IS_ERR(dp->debug)) {
1423 rc = PTR_ERR(dp->debug);
1424 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1429 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1430 struct drm_encoder *encoder)
1432 struct msm_drm_private *priv;
1435 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1438 priv = dev->dev_private;
1439 dp_display->drm_dev = dev;
1441 ret = dp_display_request_irq(dp_display);
1443 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1447 dp_display->encoder = encoder;
1449 dp_display->connector = dp_drm_connector_init(dp_display);
1450 if (IS_ERR(dp_display->connector)) {
1451 ret = PTR_ERR(dp_display->connector);
1452 DRM_DEV_ERROR(dev->dev,
1453 "failed to create dp connector: %d\n", ret);
1454 dp_display->connector = NULL;
1458 priv->connectors[priv->num_connectors++] = dp_display->connector;
1462 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1465 struct dp_display_private *dp_display;
1468 dp_display = container_of(dp, struct dp_display_private, dp_display);
1469 if (!dp_display->dp_mode.drm_mode.clock) {
1470 DRM_ERROR("invalid params\n");
1474 mutex_lock(&dp_display->event_mutex);
1476 /* stop sentinel checking */
1477 dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1479 rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1481 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1482 mutex_unlock(&dp_display->event_mutex);
1486 rc = dp_display_prepare(dp);
1488 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1489 mutex_unlock(&dp_display->event_mutex);
1493 state = dp_display->hpd_state;
1495 if (state == ST_DISPLAY_OFF)
1496 dp_display_host_init(dp_display, true);
1498 dp_display_enable(dp_display, 0);
1500 rc = dp_display_post_enable(dp);
1502 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1503 dp_display_disable(dp_display, 0);
1504 dp_display_unprepare(dp);
1507 /* manual kick off plug event to train link */
1508 if (state == ST_DISPLAY_OFF)
1509 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1511 /* completed connection */
1512 dp_display->hpd_state = ST_CONNECTED;
1514 mutex_unlock(&dp_display->event_mutex);
1519 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1521 struct dp_display_private *dp_display;
1523 dp_display = container_of(dp, struct dp_display_private, dp_display);
1525 dp_ctrl_push_idle(dp_display->ctrl);
1530 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1534 struct dp_display_private *dp_display;
1536 dp_display = container_of(dp, struct dp_display_private, dp_display);
1538 mutex_lock(&dp_display->event_mutex);
1540 /* stop sentinel checking */
1541 dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1543 dp_display_disable(dp_display, 0);
1545 rc = dp_display_unprepare(dp);
1547 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1549 state = dp_display->hpd_state;
1550 if (state == ST_DISCONNECT_PENDING) {
1551 /* completed disconnection */
1552 dp_display->hpd_state = ST_DISCONNECTED;
1554 dp_display->hpd_state = ST_DISPLAY_OFF;
1557 mutex_unlock(&dp_display->event_mutex);
1561 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1562 struct drm_display_mode *mode,
1563 struct drm_display_mode *adjusted_mode)
1565 struct dp_display_private *dp_display;
1567 dp_display = container_of(dp, struct dp_display_private, dp_display);
1569 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1571 if (dp_display_check_video_test(dp))
1572 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1573 else /* Default num_components per pixel = 3 */
1574 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1576 if (!dp_display->dp_mode.bpp)
1577 dp_display->dp_mode.bpp = 24; /* Default bpp */
1579 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1581 dp_display->dp_mode.v_active_low =
1582 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1584 dp_display->dp_mode.h_active_low =
1585 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);