drivers/gpu/drm/msm/dp/dp_display.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/module.h>
   7 #include <linux/slab.h>
   8 #include <linux/uaccess.h>
   9 #include <linux/debugfs.h>
  10 #include <linux/component.h>
  11 #include <linux/of_irq.h>
  12 #include <linux/phy/phy.h>
  13 #include <linux/delay.h>
  14 #include <drm/display/drm_dp_aux_bus.h>
  15 #include <drm/drm_edid.h>
  16
  17 #include "msm_drv.h"
  18 #include "msm_kms.h"
  19 #include "dp_ctrl.h"
  20 #include "dp_catalog.h"
  21 #include "dp_aux.h"
  22 #include "dp_reg.h"
  23 #include "dp_link.h"
  24 #include "dp_panel.h"
  25 #include "dp_display.h"
  26 #include "dp_drm.h"
  27 #include "dp_audio.h"
  28 #include "dp_debug.h"
  29
  30 static bool psr_enabled = false;
  31 module_param(psr_enabled, bool, 0);
  32 MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays");
  33
  34 #define HPD_STRING_SIZE 30
  35
  36 enum {
  37         ISR_DISCONNECTED,
  38         ISR_CONNECT_PENDING,
  39         ISR_CONNECTED,
  40         ISR_HPD_REPLUG_COUNT,
  41         ISR_IRQ_HPD_PULSE_COUNT,
  42         ISR_HPD_LO_GLITH_COUNT,
  43 };
  44
  45 /* event thread connection state */
  46 enum {
  47         ST_DISCONNECTED,
  48         ST_MAINLINK_READY,
  49         ST_CONNECTED,
  50         ST_DISCONNECT_PENDING,
  51         ST_DISPLAY_OFF,
  52 };
  53
  54 enum {
  55         EV_NO_EVENT,
  56         /* hpd events */
  57         EV_HPD_PLUG_INT,
  58         EV_IRQ_HPD_INT,
  59         EV_HPD_UNPLUG_INT,
  60         EV_USER_NOTIFICATION,
  61 };
  62
  63 #define EVENT_TIMEOUT   (HZ/10) /* 100ms */
  64 #define DP_EVENT_Q_MAX  8
  65
  66 #define DP_TIMEOUT_NONE         0
  67
  68 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
  69
  70 struct dp_event {
  71         u32 event_id;
  72         u32 data;
  73         u32 delay;
  74 };
  75
  76 struct dp_display_private {
  77         int irq;
  78
  79         unsigned int id;
  80
  81         /* state variables */
  82         bool core_initialized;
  83         bool phy_initialized;
  84         bool audio_supported;
  85
  86         struct drm_device *drm_dev;
  87
  88         struct dp_catalog *catalog;
  89         struct drm_dp_aux *aux;
  90         struct dp_link    *link;
  91         struct dp_panel   *panel;
  92         struct dp_ctrl    *ctrl;
  93
  94         struct dp_display_mode dp_mode;
  95         struct msm_dp 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 dp_event event_list[DP_EVENT_Q_MAX];
 108         spinlock_t event_lock;
 109
 110         bool wide_bus_supported;
 111
 112         struct dp_audio *audio;
 113 };
 114
 115 struct msm_dp_desc {
 116         phys_addr_t io_start;
 117         unsigned int id;
 118         bool wide_bus_supported;
 119 };
 120
 121 static const struct msm_dp_desc sc7180_dp_descs[] = {
 122         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0 },
 123         {}
 124 };
 125
 126 static const struct msm_dp_desc sc7280_dp_descs[] = {
 127         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
 128         { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
 129         {}
 130 };
 131
 132 static const struct msm_dp_desc sc8180x_dp_descs[] = {
 133         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0 },
 134         { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1 },
 135         { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2 },
 136         {}
 137 };
 138
 139 static const struct msm_dp_desc sc8280xp_dp_descs[] = {
 140         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
 141         { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
 142         { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
 143         { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
 144         { .io_start = 0x22090000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
 145         { .io_start = 0x22098000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
 146         { .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
 147         { .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
 148         {}
 149 };
 150
 151 static const struct msm_dp_desc sm8650_dp_descs[] = {
 152         { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0 },
 153         {}
 154 };
 155
 156 static const struct msm_dp_desc x1e80100_dp_descs[] = {
 157         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
 158         { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
 159         { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
 160         { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
 161         {}
 162 };
 163
 164 static const struct of_device_id dp_dt_match[] = {
 165         { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_descs },
 166         { .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_descs },
 167         { .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_descs },
 168         { .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_descs },
 169         { .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_descs },
 170         { .compatible = "qcom,sc8280xp-dp", .data = &sc8280xp_dp_descs },
 171         { .compatible = "qcom,sc8280xp-edp", .data = &sc8280xp_dp_descs },
 172         { .compatible = "qcom,sdm845-dp", .data = &sc7180_dp_descs },
 173         { .compatible = "qcom,sm8350-dp", .data = &sc7180_dp_descs },
 174         { .compatible = "qcom,sm8650-dp", .data = &sm8650_dp_descs },
 175         { .compatible = "qcom,x1e80100-dp", .data = &x1e80100_dp_descs },
 176         {}
 177 };
 178
 179 static struct dp_display_private *dev_get_dp_display_private(struct device *dev)
 180 {
 181         struct msm_dp *dp = dev_get_drvdata(dev);
 182
 183         return container_of(dp, struct dp_display_private, dp_display);
 184 }
 185
 186 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
 187                                                 u32 data, u32 delay)
 188 {
 189         unsigned long flag;
 190         struct dp_event *todo;
 191         int pndx;
 192
 193         spin_lock_irqsave(&dp_priv->event_lock, flag);
 194         pndx = dp_priv->event_pndx + 1;
 195         pndx %= DP_EVENT_Q_MAX;
 196         if (pndx == dp_priv->event_gndx) {
 197                 pr_err("event_q is full: pndx=%d gndx=%d\n",
 198                         dp_priv->event_pndx, dp_priv->event_gndx);
 199                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 200                 return -EPERM;
 201         }
 202         todo = &dp_priv->event_list[dp_priv->event_pndx++];
 203         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
 204         todo->event_id = event;
 205         todo->data = data;
 206         todo->delay = delay;
 207         wake_up(&dp_priv->event_q);
 208         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 209
 210         return 0;
 211 }
 212
 213 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
 214 {
 215         unsigned long flag;
 216         struct dp_event *todo;
 217         u32     gndx;
 218
 219         spin_lock_irqsave(&dp_priv->event_lock, flag);
 220         if (dp_priv->event_pndx == dp_priv->event_gndx) {
 221                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 222                 return -ENOENT;
 223         }
 224
 225         gndx = dp_priv->event_gndx;
 226         while (dp_priv->event_pndx != gndx) {
 227                 todo = &dp_priv->event_list[gndx];
 228                 if (todo->event_id == event) {
 229                         todo->event_id = EV_NO_EVENT;   /* deleted */
 230                         todo->delay = 0;
 231                 }
 232                 gndx++;
 233                 gndx %= DP_EVENT_Q_MAX;
 234         }
 235         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 236
 237         return 0;
 238 }
 239
 240 void dp_display_signal_audio_start(struct msm_dp *dp_display)
 241 {
 242         struct dp_display_private *dp;
 243
 244         dp = container_of(dp_display, struct dp_display_private, dp_display);
 245
 246         reinit_completion(&dp->audio_comp);
 247 }
 248
 249 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
 250 {
 251         struct dp_display_private *dp;
 252
 253         dp = container_of(dp_display, struct dp_display_private, dp_display);
 254
 255         complete_all(&dp->audio_comp);
 256 }
 257
 258 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv);
 259
 260 static int dp_display_bind(struct device *dev, struct device *master,
 261                            void *data)
 262 {
 263         int rc = 0;
 264         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 265         struct msm_drm_private *priv = dev_get_drvdata(master);
 266         struct drm_device *drm = priv->dev;
 267
 268         dp->dp_display.drm_dev = drm;
 269         priv->dp[dp->id] = &dp->dp_display;
 270
 271
 272
 273         dp->drm_dev = drm;
 274         dp->aux->drm_dev = drm;
 275         rc = dp_aux_register(dp->aux);
 276         if (rc) {
 277                 DRM_ERROR("DRM DP AUX register failed\n");
 278                 goto end;
 279         }
 280
 281
 282         rc = dp_register_audio_driver(dev, dp->audio);
 283         if (rc) {
 284                 DRM_ERROR("Audio registration Dp failed\n");
 285                 goto end;
 286         }
 287
 288         rc = dp_hpd_event_thread_start(dp);
 289         if (rc) {
 290                 DRM_ERROR("Event thread create failed\n");
 291                 goto end;
 292         }
 293
 294         return 0;
 295 end:
 296         return rc;
 297 }
 298
 299 static void dp_display_unbind(struct device *dev, struct device *master,
 300                               void *data)
 301 {
 302         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 303         struct msm_drm_private *priv = dev_get_drvdata(master);
 304
 305         kthread_stop(dp->ev_tsk);
 306
 307         of_dp_aux_depopulate_bus(dp->aux);
 308
 309         dp_unregister_audio_driver(dev, dp->audio);
 310         dp_aux_unregister(dp->aux);
 311         dp->drm_dev = NULL;
 312         dp->aux->drm_dev = NULL;
 313         priv->dp[dp->id] = NULL;
 314 }
 315
 316 static const struct component_ops dp_display_comp_ops = {
 317         .bind = dp_display_bind,
 318         .unbind = dp_display_unbind,
 319 };
 320
 321 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
 322 {
 323         struct dp_display_private *dp;
 324         struct drm_connector *connector;
 325
 326         dp = container_of(dp_display, struct dp_display_private, dp_display);
 327
 328         connector = dp->dp_display.connector;
 329         drm_helper_hpd_irq_event(connector->dev);
 330 }
 331
 332 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 333                                             bool hpd)
 334 {
 335         if ((hpd && dp->dp_display.link_ready) ||
 336                         (!hpd && !dp->dp_display.link_ready)) {
 337                 drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
 338                                 (hpd ? "on" : "off"));
 339                 return 0;
 340         }
 341
 342         /* reset video pattern flag on disconnect */
 343         if (!hpd) {
 344                 dp->panel->video_test = false;
 345                 if (!dp->dp_display.is_edp)
 346                         drm_dp_set_subconnector_property(dp->dp_display.connector,
 347                                                          connector_status_disconnected,
 348                                                          dp->panel->dpcd,
 349                                                          dp->panel->downstream_ports);
 350         }
 351
 352         dp->dp_display.link_ready = hpd;
 353
 354         drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
 355                         dp->dp_display.connector_type, hpd);
 356         dp_display_send_hpd_event(&dp->dp_display);
 357
 358         return 0;
 359 }
 360
 361 static int dp_display_process_hpd_high(struct dp_display_private *dp)
 362 {
 363         int rc = 0;
 364         struct edid *edid;
 365
 366         rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
 367         if (rc)
 368                 goto end;
 369
 370         dp_link_process_request(dp->link);
 371
 372         if (!dp->dp_display.is_edp)
 373                 drm_dp_set_subconnector_property(dp->dp_display.connector,
 374                                                  connector_status_connected,
 375                                                  dp->panel->dpcd,
 376                                                  dp->panel->downstream_ports);
 377
 378         edid = dp->panel->edid;
 379
 380         dp->dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
 381
 382         dp->audio_supported = drm_detect_monitor_audio(edid);
 383         dp_panel_handle_sink_request(dp->panel);
 384
 385         /*
 386          * set sink to normal operation mode -- D0
 387          * before dpcd read
 388          */
 389         dp_link_psm_config(dp->link, &dp->panel->link_info, false);
 390
 391         dp_link_reset_phy_params_vx_px(dp->link);
 392         rc = dp_ctrl_on_link(dp->ctrl);
 393         if (rc) {
 394                 DRM_ERROR("failed to complete DP link training\n");
 395                 goto end;
 396         }
 397
 398         dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
 399
 400 end:
 401         return rc;
 402 }
 403
 404 static void dp_display_host_phy_init(struct dp_display_private *dp)
 405 {
 406         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 407                 dp->dp_display.connector_type, dp->core_initialized,
 408                 dp->phy_initialized);
 409
 410         if (!dp->phy_initialized) {
 411                 dp_ctrl_phy_init(dp->ctrl);
 412                 dp->phy_initialized = true;
 413         }
 414 }
 415
 416 static void dp_display_host_phy_exit(struct dp_display_private *dp)
 417 {
 418         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 419                 dp->dp_display.connector_type, dp->core_initialized,
 420                 dp->phy_initialized);
 421
 422         if (dp->phy_initialized) {
 423                 dp_ctrl_phy_exit(dp->ctrl);
 424                 dp->phy_initialized = false;
 425         }
 426 }
 427
 428 static void dp_display_host_init(struct dp_display_private *dp)
 429 {
 430         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 431                 dp->dp_display.connector_type, dp->core_initialized,
 432                 dp->phy_initialized);
 433
 434         dp_ctrl_core_clk_enable(dp->ctrl);
 435         dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
 436         dp_aux_init(dp->aux);
 437         dp->core_initialized = true;
 438 }
 439
 440 static void dp_display_host_deinit(struct dp_display_private *dp)
 441 {
 442         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 443                 dp->dp_display.connector_type, dp->core_initialized,
 444                 dp->phy_initialized);
 445
 446         dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
 447         dp_aux_deinit(dp->aux);
 448         dp_ctrl_core_clk_disable(dp->ctrl);
 449         dp->core_initialized = false;
 450 }
 451
 452 static int dp_display_usbpd_configure_cb(struct device *dev)
 453 {
 454         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 455
 456         dp_display_host_phy_init(dp);
 457
 458         return dp_display_process_hpd_high(dp);
 459 }
 460
 461 static int dp_display_notify_disconnect(struct device *dev)
 462 {
 463         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 464
 465         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 466
 467         return 0;
 468 }
 469
 470 static void dp_display_handle_video_request(struct dp_display_private *dp)
 471 {
 472         if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
 473                 dp->panel->video_test = true;
 474                 dp_link_send_test_response(dp->link);
 475         }
 476 }
 477
 478 static int dp_display_handle_port_status_changed(struct dp_display_private *dp)
 479 {
 480         int rc = 0;
 481
 482         if (drm_dp_is_branch(dp->panel->dpcd) && dp->link->sink_count == 0) {
 483                 drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n");
 484                 if (dp->hpd_state != ST_DISCONNECTED) {
 485                         dp->hpd_state = ST_DISCONNECT_PENDING;
 486                         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 487                 }
 488         } else {
 489                 if (dp->hpd_state == ST_DISCONNECTED) {
 490                         dp->hpd_state = ST_MAINLINK_READY;
 491                         rc = dp_display_process_hpd_high(dp);
 492                         if (rc)
 493                                 dp->hpd_state = ST_DISCONNECTED;
 494                 }
 495         }
 496
 497         return rc;
 498 }
 499
 500 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
 501 {
 502         u32 sink_request = dp->link->sink_request;
 503
 504         drm_dbg_dp(dp->drm_dev, "%d\n", sink_request);
 505         if (dp->hpd_state == ST_DISCONNECTED) {
 506                 if (sink_request & DP_LINK_STATUS_UPDATED) {
 507                         drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n",
 508                                                         sink_request);
 509                         DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
 510                         return -EINVAL;
 511                 }
 512         }
 513
 514         dp_ctrl_handle_sink_request(dp->ctrl);
 515
 516         if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
 517                 dp_display_handle_video_request(dp);
 518
 519         return 0;
 520 }
 521
 522 static int dp_display_usbpd_attention_cb(struct device *dev)
 523 {
 524         int rc = 0;
 525         u32 sink_request;
 526         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 527
 528         /* check for any test request issued by sink */
 529         rc = dp_link_process_request(dp->link);
 530         if (!rc) {
 531                 sink_request = dp->link->sink_request;
 532                 drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n",
 533                                         dp->hpd_state, sink_request);
 534                 if (sink_request & DS_PORT_STATUS_CHANGED)
 535                         rc = dp_display_handle_port_status_changed(dp);
 536                 else
 537                         rc = dp_display_handle_irq_hpd(dp);
 538         }
 539
 540         return rc;
 541 }
 542
 543 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 544 {
 545         u32 state;
 546         int ret;
 547         struct platform_device *pdev = dp->dp_display.pdev;
 548
 549         dp_aux_enable_xfers(dp->aux, true);
 550
 551         mutex_lock(&dp->event_mutex);
 552
 553         state =  dp->hpd_state;
 554         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 555                         dp->dp_display.connector_type, state);
 556
 557         if (state == ST_DISPLAY_OFF) {
 558                 mutex_unlock(&dp->event_mutex);
 559                 return 0;
 560         }
 561
 562         if (state == ST_MAINLINK_READY || state == ST_CONNECTED) {
 563                 mutex_unlock(&dp->event_mutex);
 564                 return 0;
 565         }
 566
 567         if (state == ST_DISCONNECT_PENDING) {
 568                 /* wait until ST_DISCONNECTED */
 569                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
 570                 mutex_unlock(&dp->event_mutex);
 571                 return 0;
 572         }
 573
 574         ret = pm_runtime_resume_and_get(&pdev->dev);
 575         if (ret) {
 576                 DRM_ERROR("failed to pm_runtime_resume\n");
 577                 mutex_unlock(&dp->event_mutex);
 578                 return ret;
 579         }
 580
 581         ret = dp_display_usbpd_configure_cb(&pdev->dev);
 582         if (ret) {      /* link train failed */
 583                 dp->hpd_state = ST_DISCONNECTED;
 584                 pm_runtime_put_sync(&pdev->dev);
 585         } else {
 586                 dp->hpd_state = ST_MAINLINK_READY;
 587         }
 588
 589         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 590                         dp->dp_display.connector_type, state);
 591         mutex_unlock(&dp->event_mutex);
 592
 593         /* uevent will complete connection part */
 594         return 0;
 595 };
 596
 597 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 598                 bool plugged)
 599 {
 600         struct dp_display_private *dp;
 601
 602         dp = container_of(dp_display,
 603                         struct dp_display_private, dp_display);
 604
 605         /* notify audio subsystem only if sink supports audio */
 606         if (dp_display->plugged_cb && dp_display->codec_dev &&
 607                         dp->audio_supported)
 608                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 609 }
 610
 611 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 612 {
 613         u32 state;
 614         struct platform_device *pdev = dp->dp_display.pdev;
 615
 616         dp_aux_enable_xfers(dp->aux, false);
 617
 618         mutex_lock(&dp->event_mutex);
 619
 620         state = dp->hpd_state;
 621
 622         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 623                         dp->dp_display.connector_type, state);
 624
 625         /* unplugged, no more irq_hpd handle */
 626         dp_del_event(dp, EV_IRQ_HPD_INT);
 627
 628         if (state == ST_DISCONNECTED) {
 629                 /* triggered by irq_hdp with sink_count = 0 */
 630                 if (dp->link->sink_count == 0) {
 631                         dp_display_host_phy_exit(dp);
 632                 }
 633                 dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 634                 mutex_unlock(&dp->event_mutex);
 635                 return 0;
 636         } else if (state == ST_DISCONNECT_PENDING) {
 637                 mutex_unlock(&dp->event_mutex);
 638                 return 0;
 639         } else if (state == ST_MAINLINK_READY) {
 640                 dp_ctrl_off_link(dp->ctrl);
 641                 dp_display_host_phy_exit(dp);
 642                 dp->hpd_state = ST_DISCONNECTED;
 643                 dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 644                 pm_runtime_put_sync(&pdev->dev);
 645                 mutex_unlock(&dp->event_mutex);
 646                 return 0;
 647         }
 648
 649         /*
 650          * We don't need separate work for disconnect as
 651          * connect/attention interrupts are disabled
 652          */
 653         dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 654
 655         if (state == ST_DISPLAY_OFF) {
 656                 dp->hpd_state = ST_DISCONNECTED;
 657         } else {
 658                 dp->hpd_state = ST_DISCONNECT_PENDING;
 659         }
 660
 661         /* signal the disconnect event early to ensure proper teardown */
 662         dp_display_handle_plugged_change(&dp->dp_display, false);
 663
 664         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 665                         dp->dp_display.connector_type, state);
 666
 667         /* uevent will complete disconnection part */
 668         pm_runtime_put_sync(&pdev->dev);
 669         mutex_unlock(&dp->event_mutex);
 670         return 0;
 671 }
 672
 673 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 674 {
 675         u32 state;
 676
 677         mutex_lock(&dp->event_mutex);
 678
 679         /* irq_hpd can happen at either connected or disconnected state */
 680         state =  dp->hpd_state;
 681         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 682                         dp->dp_display.connector_type, state);
 683
 684         if (state == ST_DISPLAY_OFF) {
 685                 mutex_unlock(&dp->event_mutex);
 686                 return 0;
 687         }
 688
 689         if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
 690                 /* wait until ST_CONNECTED */
 691                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 692                 mutex_unlock(&dp->event_mutex);
 693                 return 0;
 694         }
 695
 696         dp_display_usbpd_attention_cb(&dp->dp_display.pdev->dev);
 697
 698         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 699                         dp->dp_display.connector_type, state);
 700
 701         mutex_unlock(&dp->event_mutex);
 702
 703         return 0;
 704 }
 705
 706 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 707 {
 708         dp_audio_put(dp->audio);
 709         dp_panel_put(dp->panel);
 710         dp_aux_put(dp->aux);
 711 }
 712
 713 static int dp_init_sub_modules(struct dp_display_private *dp)
 714 {
 715         int rc = 0;
 716         struct device *dev = &dp->dp_display.pdev->dev;
 717         struct dp_panel_in panel_in = {
 718                 .dev = dev,
 719         };
 720         struct phy *phy;
 721
 722         phy = devm_phy_get(dev, "dp");
 723         if (IS_ERR(phy))
 724                 return PTR_ERR(phy);
 725
 726         rc = phy_set_mode_ext(phy, PHY_MODE_DP,
 727                               dp->dp_display.is_edp ? PHY_SUBMODE_EDP : PHY_SUBMODE_DP);
 728         if (rc) {
 729                 DRM_ERROR("failed to set phy submode, rc = %d\n", rc);
 730                 dp->catalog = NULL;
 731                 goto error;
 732         }
 733
 734         dp->catalog = dp_catalog_get(dev);
 735         if (IS_ERR(dp->catalog)) {
 736                 rc = PTR_ERR(dp->catalog);
 737                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 738                 dp->catalog = NULL;
 739                 goto error;
 740         }
 741
 742         dp->aux = dp_aux_get(dev, dp->catalog,
 743                              phy,
 744                              dp->dp_display.is_edp);
 745         if (IS_ERR(dp->aux)) {
 746                 rc = PTR_ERR(dp->aux);
 747                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 748                 dp->aux = NULL;
 749                 goto error;
 750         }
 751
 752         dp->link = dp_link_get(dev, dp->aux);
 753         if (IS_ERR(dp->link)) {
 754                 rc = PTR_ERR(dp->link);
 755                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 756                 dp->link = NULL;
 757                 goto error_link;
 758         }
 759
 760         panel_in.aux = dp->aux;
 761         panel_in.catalog = dp->catalog;
 762         panel_in.link = dp->link;
 763
 764         dp->panel = dp_panel_get(&panel_in);
 765         if (IS_ERR(dp->panel)) {
 766                 rc = PTR_ERR(dp->panel);
 767                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 768                 dp->panel = NULL;
 769                 goto error_link;
 770         }
 771
 772         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 773                                dp->catalog,
 774                                phy);
 775         if (IS_ERR(dp->ctrl)) {
 776                 rc = PTR_ERR(dp->ctrl);
 777                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 778                 dp->ctrl = NULL;
 779                 goto error_ctrl;
 780         }
 781
 782         dp->audio = dp_audio_get(dp->dp_display.pdev, dp->panel, dp->catalog);
 783         if (IS_ERR(dp->audio)) {
 784                 rc = PTR_ERR(dp->audio);
 785                 pr_err("failed to initialize audio, rc = %d\n", rc);
 786                 dp->audio = NULL;
 787                 goto error_ctrl;
 788         }
 789
 790         return rc;
 791
 792 error_ctrl:
 793         dp_panel_put(dp->panel);
 794 error_link:
 795         dp_aux_put(dp->aux);
 796 error:
 797         return rc;
 798 }
 799
 800 static int dp_display_set_mode(struct msm_dp *dp_display,
 801                                struct dp_display_mode *mode)
 802 {
 803         struct dp_display_private *dp;
 804
 805         dp = container_of(dp_display, struct dp_display_private, dp_display);
 806
 807         drm_mode_copy(&dp->panel->dp_mode.drm_mode, &mode->drm_mode);
 808         dp->panel->dp_mode.bpp = mode->bpp;
 809         dp->panel->dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420;
 810         dp_panel_init_panel_info(dp->panel);
 811         return 0;
 812 }
 813
 814 static int dp_display_enable(struct dp_display_private *dp, bool force_link_train)
 815 {
 816         int rc = 0;
 817         struct msm_dp *dp_display = &dp->dp_display;
 818
 819         drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
 820         if (dp_display->power_on) {
 821                 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
 822                 return 0;
 823         }
 824
 825         rc = dp_ctrl_on_stream(dp->ctrl, force_link_train);
 826         if (!rc)
 827                 dp_display->power_on = true;
 828
 829         return rc;
 830 }
 831
 832 static int dp_display_post_enable(struct msm_dp *dp_display)
 833 {
 834         struct dp_display_private *dp;
 835         u32 rate;
 836
 837         dp = container_of(dp_display, struct dp_display_private, dp_display);
 838
 839         rate = dp->link->link_params.rate;
 840
 841         if (dp->audio_supported) {
 842                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 843                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 844         }
 845
 846         /* signal the connect event late to synchronize video and display */
 847         dp_display_handle_plugged_change(dp_display, true);
 848
 849         if (dp_display->psr_supported)
 850                 dp_ctrl_config_psr(dp->ctrl);
 851
 852         return 0;
 853 }
 854
 855 static int dp_display_disable(struct dp_display_private *dp)
 856 {
 857         struct msm_dp *dp_display = &dp->dp_display;
 858
 859         if (!dp_display->power_on)
 860                 return 0;
 861
 862         /* wait only if audio was enabled */
 863         if (dp_display->audio_enabled) {
 864                 /* signal the disconnect event */
 865                 dp_display_handle_plugged_change(dp_display, false);
 866                 if (!wait_for_completion_timeout(&dp->audio_comp,
 867                                 HZ * 5))
 868                         DRM_ERROR("audio comp timeout\n");
 869         }
 870
 871         dp_display->audio_enabled = false;
 872
 873         if (dp->link->sink_count == 0) {
 874                 /*
 875                  * irq_hpd with sink_count = 0
 876                  * hdmi unplugged out of dongle
 877                  */
 878                 dp_ctrl_off_link_stream(dp->ctrl);
 879         } else {
 880                 /*
 881                  * unplugged interrupt
 882                  * dongle unplugged out of DUT
 883                  */
 884                 dp_ctrl_off(dp->ctrl);
 885                 dp_display_host_phy_exit(dp);
 886         }
 887
 888         dp_display->power_on = false;
 889
 890         drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
 891         return 0;
 892 }
 893
 894 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 895                 hdmi_codec_plugged_cb fn, struct device *codec_dev)
 896 {
 897         bool plugged;
 898
 899         dp_display->plugged_cb = fn;
 900         dp_display->codec_dev = codec_dev;
 901         plugged = dp_display->link_ready;
 902         dp_display_handle_plugged_change(dp_display, plugged);
 903
 904         return 0;
 905 }
 906
 907 /**
 908  * dp_bridge_mode_valid - callback to determine if specified mode is valid
 909  * @bridge: Pointer to drm bridge structure
 910  * @info: display info
 911  * @mode: Pointer to drm mode structure
 912  * Returns: Validity status for specified mode
 913  */
 914 enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
 915                                           const struct drm_display_info *info,
 916                                           const struct drm_display_mode *mode)
 917 {
 918         const u32 num_components = 3, default_bpp = 24;
 919         struct dp_display_private *dp_display;
 920         struct dp_link_info *link_info;
 921         u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
 922         struct msm_dp *dp;
 923         int mode_pclk_khz = mode->clock;
 924
 925         dp = to_dp_bridge(bridge)->dp_display;
 926
 927         if (!dp || !mode_pclk_khz || !dp->connector) {
 928                 DRM_ERROR("invalid params\n");
 929                 return -EINVAL;
 930         }
 931
 932         if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)
 933                 return MODE_CLOCK_HIGH;
 934
 935         dp_display = container_of(dp, struct dp_display_private, dp_display);
 936         link_info = &dp_display->panel->link_info;
 937
 938         if (drm_mode_is_420_only(&dp->connector->display_info, mode) &&
 939             dp_display->panel->vsc_sdp_supported)
 940                 mode_pclk_khz /= 2;
 941
 942         mode_bpp = dp->connector->display_info.bpc * num_components;
 943         if (!mode_bpp)
 944                 mode_bpp = default_bpp;
 945
 946         mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
 947                         mode_bpp, mode_pclk_khz);
 948
 949         mode_rate_khz = mode_pclk_khz * mode_bpp;
 950         supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
 951
 952         if (mode_rate_khz > supported_rate_khz)
 953                 return MODE_BAD;
 954
 955         return MODE_OK;
 956 }
 957
 958 int dp_display_get_modes(struct msm_dp *dp)
 959 {
 960         struct dp_display_private *dp_display;
 961
 962         if (!dp) {
 963                 DRM_ERROR("invalid params\n");
 964                 return 0;
 965         }
 966
 967         dp_display = container_of(dp, struct dp_display_private, dp_display);
 968
 969         return dp_panel_get_modes(dp_display->panel,
 970                 dp->connector);
 971 }
 972
 973 bool dp_display_check_video_test(struct msm_dp *dp)
 974 {
 975         struct dp_display_private *dp_display;
 976
 977         dp_display = container_of(dp, struct dp_display_private, dp_display);
 978
 979         return dp_display->panel->video_test;
 980 }
 981
 982 int dp_display_get_test_bpp(struct msm_dp *dp)
 983 {
 984         struct dp_display_private *dp_display;
 985
 986         if (!dp) {
 987                 DRM_ERROR("invalid params\n");
 988                 return 0;
 989         }
 990
 991         dp_display = container_of(dp, struct dp_display_private, dp_display);
 992
 993         return dp_link_bit_depth_to_bpp(
 994                 dp_display->link->test_video.test_bit_depth);
 995 }
 996
 997 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
 998 {
 999         struct dp_display_private *dp_display;
1000
1001         dp_display = container_of(dp, struct dp_display_private, dp_display);
1002
1003         /*
1004          * if we are reading registers we need the link clocks to be on
1005          * however till DP cable is connected this will not happen as we
1006          * do not know the resolution to power up with. Hence check the
1007          * power_on status before dumping DP registers to avoid crash due
1008          * to unclocked access
1009          */
1010         mutex_lock(&dp_display->event_mutex);
1011
1012         if (!dp->power_on) {
1013                 mutex_unlock(&dp_display->event_mutex);
1014                 return;
1015         }
1016
1017         dp_catalog_snapshot(dp_display->catalog, disp_state);
1018
1019         mutex_unlock(&dp_display->event_mutex);
1020 }
1021
1022 void dp_display_set_psr(struct msm_dp *dp_display, bool enter)
1023 {
1024         struct dp_display_private *dp;
1025
1026         if (!dp_display) {
1027                 DRM_ERROR("invalid params\n");
1028                 return;
1029         }
1030
1031         dp = container_of(dp_display, struct dp_display_private, dp_display);
1032         dp_ctrl_set_psr(dp->ctrl, enter);
1033 }
1034
1035 static int hpd_event_thread(void *data)
1036 {
1037         struct dp_display_private *dp_priv;
1038         unsigned long flag;
1039         struct dp_event *todo;
1040         int timeout_mode = 0;
1041
1042         dp_priv = (struct dp_display_private *)data;
1043
1044         while (1) {
1045                 if (timeout_mode) {
1046                         wait_event_timeout(dp_priv->event_q,
1047                                 (dp_priv->event_pndx == dp_priv->event_gndx) ||
1048                                         kthread_should_stop(), EVENT_TIMEOUT);
1049                 } else {
1050                         wait_event_interruptible(dp_priv->event_q,
1051                                 (dp_priv->event_pndx != dp_priv->event_gndx) ||
1052                                         kthread_should_stop());
1053                 }
1054
1055                 if (kthread_should_stop())
1056                         break;
1057
1058                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1059                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1060                 if (todo->delay) {
1061                         struct dp_event *todo_next;
1062
1063                         dp_priv->event_gndx++;
1064                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1065
1066                         /* re enter delay event into q */
1067                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1068                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1069                         todo_next->event_id = todo->event_id;
1070                         todo_next->data = todo->data;
1071                         todo_next->delay = todo->delay - 1;
1072
1073                         /* clean up older event */
1074                         todo->event_id = EV_NO_EVENT;
1075                         todo->delay = 0;
1076
1077                         /* switch to timeout mode */
1078                         timeout_mode = 1;
1079                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1080                         continue;
1081                 }
1082
1083                 /* timeout with no events in q */
1084                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1085                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1086                         continue;
1087                 }
1088
1089                 dp_priv->event_gndx++;
1090                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1091                 timeout_mode = 0;
1092                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1093
1094                 switch (todo->event_id) {
1095                 case EV_HPD_PLUG_INT:
1096                         dp_hpd_plug_handle(dp_priv, todo->data);
1097                         break;
1098                 case EV_HPD_UNPLUG_INT:
1099                         dp_hpd_unplug_handle(dp_priv, todo->data);
1100                         break;
1101                 case EV_IRQ_HPD_INT:
1102                         dp_irq_hpd_handle(dp_priv, todo->data);
1103                         break;
1104                 case EV_USER_NOTIFICATION:
1105                         dp_display_send_hpd_notification(dp_priv,
1106                                                 todo->data);
1107                         break;
1108                 default:
1109                         break;
1110                 }
1111         }
1112
1113         return 0;
1114 }
1115
1116 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv)
1117 {
1118         /* set event q to empty */
1119         dp_priv->event_gndx = 0;
1120         dp_priv->event_pndx = 0;
1121
1122         dp_priv->ev_tsk = kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1123         if (IS_ERR(dp_priv->ev_tsk))
1124                 return PTR_ERR(dp_priv->ev_tsk);
1125
1126         return 0;
1127 }
1128
1129 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1130 {
1131         struct dp_display_private *dp = dev_id;
1132         irqreturn_t ret = IRQ_NONE;
1133         u32 hpd_isr_status;
1134
1135         if (!dp) {
1136                 DRM_ERROR("invalid data\n");
1137                 return IRQ_NONE;
1138         }
1139
1140         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1141
1142         if (hpd_isr_status & 0x0F) {
1143                 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
1144                         dp->dp_display.connector_type, hpd_isr_status);
1145                 /* hpd related interrupts */
1146                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1147                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1148
1149                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1150                         dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1151                 }
1152
1153                 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1154                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1155                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1156                 }
1157
1158                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1159                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1160
1161                 ret = IRQ_HANDLED;
1162         }
1163
1164         /* DP controller isr */
1165         ret |= dp_ctrl_isr(dp->ctrl);
1166
1167         /* DP aux isr */
1168         ret |= dp_aux_isr(dp->aux);
1169
1170         return ret;
1171 }
1172
1173 static int dp_display_request_irq(struct dp_display_private *dp)
1174 {
1175         int rc = 0;
1176         struct platform_device *pdev = dp->dp_display.pdev;
1177
1178         dp->irq = platform_get_irq(pdev, 0);
1179         if (dp->irq < 0) {
1180                 DRM_ERROR("failed to get irq\n");
1181                 return dp->irq;
1182         }
1183
1184         rc = devm_request_irq(&pdev->dev, dp->irq, dp_display_irq_handler,
1185                               IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN,
1186                               "dp_display_isr", dp);
1187
1188         if (rc < 0) {
1189                 DRM_ERROR("failed to request IRQ%u: %d\n",
1190                                 dp->irq, rc);
1191                 return rc;
1192         }
1193
1194         return 0;
1195 }
1196
1197 static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
1198 {
1199         const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
1200         struct resource *res;
1201         int i;
1202
1203         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1204         if (!res)
1205                 return NULL;
1206
1207         for (i = 0; i < descs[i].io_start; i++) {
1208                 if (descs[i].io_start == res->start)
1209                         return &descs[i];
1210         }
1211
1212         dev_err(&pdev->dev, "unknown displayport instance\n");
1213         return NULL;
1214 }
1215
1216 static int dp_display_probe_tail(struct device *dev)
1217 {
1218         struct msm_dp *dp = dev_get_drvdata(dev);
1219         int ret;
1220
1221         /*
1222          * External bridges are mandatory for eDP interfaces: one has to
1223          * provide at least an eDP panel (which gets wrapped into panel-bridge).
1224          *
1225          * For DisplayPort interfaces external bridges are optional, so
1226          * silently ignore an error if one is not present (-ENODEV).
1227          */
1228         dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
1229         if (IS_ERR(dp->next_bridge)) {
1230                 ret = PTR_ERR(dp->next_bridge);
1231                 dp->next_bridge = NULL;
1232                 if (dp->is_edp || ret != -ENODEV)
1233                         return ret;
1234         }
1235
1236         ret = component_add(dev, &dp_display_comp_ops);
1237         if (ret)
1238                 DRM_ERROR("component add failed, rc=%d\n", ret);
1239
1240         return ret;
1241 }
1242
1243 static int dp_auxbus_done_probe(struct drm_dp_aux *aux)
1244 {
1245         return dp_display_probe_tail(aux->dev);
1246 }
1247
1248 static int dp_display_get_connector_type(struct platform_device *pdev,
1249                                          const struct msm_dp_desc *desc)
1250 {
1251         struct device_node *node = pdev->dev.of_node;
1252         struct device_node *aux_bus = of_get_child_by_name(node, "aux-bus");
1253         struct device_node *panel = of_get_child_by_name(aux_bus, "panel");
1254         int connector_type;
1255
1256         if (panel)
1257                 connector_type = DRM_MODE_CONNECTOR_eDP;
1258         else
1259                 connector_type = DRM_MODE_SUBCONNECTOR_DisplayPort;
1260
1261         of_node_put(panel);
1262         of_node_put(aux_bus);
1263
1264         return connector_type;
1265 }
1266
1267 static int dp_display_probe(struct platform_device *pdev)
1268 {
1269         int rc = 0;
1270         struct dp_display_private *dp;
1271         const struct msm_dp_desc *desc;
1272
1273         if (!pdev || !pdev->dev.of_node) {
1274                 DRM_ERROR("pdev not found\n");
1275                 return -ENODEV;
1276         }
1277
1278         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1279         if (!dp)
1280                 return -ENOMEM;
1281
1282         desc = dp_display_get_desc(pdev);
1283         if (!desc)
1284                 return -EINVAL;
1285
1286         dp->dp_display.pdev = pdev;
1287         dp->id = desc->id;
1288         dp->dp_display.connector_type = dp_display_get_connector_type(pdev, desc);
1289         dp->wide_bus_supported = desc->wide_bus_supported;
1290         dp->dp_display.is_edp =
1291                 (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
1292
1293         rc = dp_init_sub_modules(dp);
1294         if (rc) {
1295                 DRM_ERROR("init sub module failed\n");
1296                 return -EPROBE_DEFER;
1297         }
1298
1299         /* setup event q */
1300         mutex_init(&dp->event_mutex);
1301         init_waitqueue_head(&dp->event_q);
1302         spin_lock_init(&dp->event_lock);
1303
1304         /* Store DP audio handle inside DP display */
1305         dp->dp_display.dp_audio = dp->audio;
1306
1307         init_completion(&dp->audio_comp);
1308
1309         platform_set_drvdata(pdev, &dp->dp_display);
1310
1311         rc = devm_pm_runtime_enable(&pdev->dev);
1312         if (rc)
1313                 goto err;
1314
1315         rc = dp_display_request_irq(dp);
1316         if (rc)
1317                 goto err;
1318
1319         if (dp->dp_display.is_edp) {
1320                 rc = devm_of_dp_aux_populate_bus(dp->aux, dp_auxbus_done_probe);
1321                 if (rc) {
1322                         DRM_ERROR("eDP auxbus population failed, rc=%d\n", rc);
1323                         goto err;
1324                 }
1325         } else {
1326                 rc = dp_display_probe_tail(&pdev->dev);
1327                 if (rc)
1328                         goto err;
1329         }
1330
1331         return rc;
1332
1333 err:
1334         dp_display_deinit_sub_modules(dp);
1335         return rc;
1336 }
1337
1338 static void dp_display_remove(struct platform_device *pdev)
1339 {
1340         struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
1341
1342         component_del(&pdev->dev, &dp_display_comp_ops);
1343         dp_display_deinit_sub_modules(dp);
1344         platform_set_drvdata(pdev, NULL);
1345 }
1346
1347 static int dp_pm_runtime_suspend(struct device *dev)
1348 {
1349         struct dp_display_private *dp = dev_get_dp_display_private(dev);
1350
1351         disable_irq(dp->irq);
1352
1353         if (dp->dp_display.is_edp) {
1354                 dp_display_host_phy_exit(dp);
1355                 dp_catalog_ctrl_hpd_disable(dp->catalog);
1356         }
1357         dp_display_host_deinit(dp);
1358
1359         return 0;
1360 }
1361
1362 static int dp_pm_runtime_resume(struct device *dev)
1363 {
1364         struct dp_display_private *dp = dev_get_dp_display_private(dev);
1365
1366         /*
1367          * for eDP, host cotroller, HPD block and PHY are enabled here
1368          * but with HPD irq disabled
1369          *
1370          * for DP, only host controller is enabled here.
1371          * HPD block is enabled at dp_bridge_hpd_enable()
1372          * PHY will be enabled at plugin handler later
1373          */
1374         dp_display_host_init(dp);
1375         if (dp->dp_display.is_edp) {
1376                 dp_catalog_ctrl_hpd_enable(dp->catalog);
1377                 dp_display_host_phy_init(dp);
1378         }
1379
1380         enable_irq(dp->irq);
1381         return 0;
1382 }
1383
1384 static const struct dev_pm_ops dp_pm_ops = {
1385         SET_RUNTIME_PM_OPS(dp_pm_runtime_suspend, dp_pm_runtime_resume, NULL)
1386         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1387                                 pm_runtime_force_resume)
1388 };
1389
1390 static struct platform_driver dp_display_driver = {
1391         .probe  = dp_display_probe,
1392         .remove_new = dp_display_remove,
1393         .driver = {
1394                 .name = "msm-dp-display",
1395                 .of_match_table = dp_dt_match,
1396                 .suppress_bind_attrs = true,
1397                 .pm = &dp_pm_ops,
1398         },
1399 };
1400
1401 int __init msm_dp_register(void)
1402 {
1403         int ret;
1404
1405         ret = platform_driver_register(&dp_display_driver);
1406         if (ret)
1407                 DRM_ERROR("Dp display driver register failed");
1408
1409         return ret;
1410 }
1411
1412 void __exit msm_dp_unregister(void)
1413 {
1414         platform_driver_unregister(&dp_display_driver);
1415 }
1416
1417 bool msm_dp_is_yuv_420_enabled(const struct msm_dp *dp_display,
1418                                const struct drm_display_mode *mode)
1419 {
1420         struct dp_display_private *dp;
1421         const struct drm_display_info *info;
1422
1423         dp = container_of(dp_display, struct dp_display_private, dp_display);
1424         info = &dp_display->connector->display_info;
1425
1426         return dp->panel->vsc_sdp_supported && drm_mode_is_420_only(info, mode);
1427 }
1428
1429 bool msm_dp_needs_periph_flush(const struct msm_dp *dp_display,
1430                                const struct drm_display_mode *mode)
1431 {
1432         return msm_dp_is_yuv_420_enabled(dp_display, mode);
1433 }
1434
1435 bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
1436 {
1437         struct dp_display_private *dp;
1438
1439         dp = container_of(dp_display, struct dp_display_private, dp_display);
1440
1441         if (dp->dp_mode.out_fmt_is_yuv_420)
1442                 return false;
1443
1444         return dp->wide_bus_supported;
1445 }
1446
1447 void dp_display_debugfs_init(struct msm_dp *dp_display, struct dentry *root, bool is_edp)
1448 {
1449         struct dp_display_private *dp;
1450         struct device *dev;
1451         int rc;
1452
1453         dp = container_of(dp_display, struct dp_display_private, dp_display);
1454         dev = &dp->dp_display.pdev->dev;
1455
1456         rc = dp_debug_init(dev, dp->panel, dp->link, dp->dp_display.connector, root, is_edp);
1457         if (rc)
1458                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1459 }
1460
1461 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1462                         struct drm_encoder *encoder, bool yuv_supported)
1463 {
1464         struct dp_display_private *dp_priv;
1465         int ret;
1466
1467         dp_display->drm_dev = dev;
1468
1469         dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
1470
1471         ret = dp_bridge_init(dp_display, dev, encoder);
1472         if (ret) {
1473                 DRM_DEV_ERROR(dev->dev,
1474                         "failed to create dp bridge: %d\n", ret);
1475                 return ret;
1476         }
1477
1478         dp_display->connector = dp_drm_connector_init(dp_display, encoder, yuv_supported);
1479         if (IS_ERR(dp_display->connector)) {
1480                 ret = PTR_ERR(dp_display->connector);
1481                 DRM_DEV_ERROR(dev->dev,
1482                         "failed to create dp connector: %d\n", ret);
1483                 dp_display->connector = NULL;
1484                 return ret;
1485         }
1486
1487         dp_priv->panel->connector = dp_display->connector;
1488
1489         return 0;
1490 }
1491
1492 void dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
1493                              struct drm_bridge_state *old_bridge_state)
1494 {
1495         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1496         struct msm_dp *dp = dp_bridge->dp_display;
1497         int rc = 0;
1498         struct dp_display_private *dp_display;
1499         u32 state;
1500         bool force_link_train = false;
1501
1502         dp_display = container_of(dp, struct dp_display_private, dp_display);
1503         if (!dp_display->dp_mode.drm_mode.clock) {
1504                 DRM_ERROR("invalid params\n");
1505                 return;
1506         }
1507
1508         if (dp->is_edp)
1509                 dp_hpd_plug_handle(dp_display, 0);
1510
1511         mutex_lock(&dp_display->event_mutex);
1512         if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
1513                 DRM_ERROR("failed to pm_runtime_resume\n");
1514                 mutex_unlock(&dp_display->event_mutex);
1515                 return;
1516         }
1517
1518         state = dp_display->hpd_state;
1519         if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
1520                 mutex_unlock(&dp_display->event_mutex);
1521                 return;
1522         }
1523
1524         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1525         if (rc) {
1526                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1527                 mutex_unlock(&dp_display->event_mutex);
1528                 return;
1529         }
1530
1531         state =  dp_display->hpd_state;
1532
1533         if (state == ST_DISPLAY_OFF) {
1534                 dp_display_host_phy_init(dp_display);
1535                 force_link_train = true;
1536         }
1537
1538         dp_display_enable(dp_display, force_link_train);
1539
1540         rc = dp_display_post_enable(dp);
1541         if (rc) {
1542                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1543                 dp_display_disable(dp_display);
1544         }
1545
1546         /* completed connection */
1547         dp_display->hpd_state = ST_CONNECTED;
1548
1549         drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1550         mutex_unlock(&dp_display->event_mutex);
1551 }
1552
1553 void dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
1554                               struct drm_bridge_state *old_bridge_state)
1555 {
1556         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1557         struct msm_dp *dp = dp_bridge->dp_display;
1558         struct dp_display_private *dp_display;
1559
1560         dp_display = container_of(dp, struct dp_display_private, dp_display);
1561
1562         dp_ctrl_push_idle(dp_display->ctrl);
1563 }
1564
1565 void dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
1566                                    struct drm_bridge_state *old_bridge_state)
1567 {
1568         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1569         struct msm_dp *dp = dp_bridge->dp_display;
1570         u32 state;
1571         struct dp_display_private *dp_display;
1572
1573         dp_display = container_of(dp, struct dp_display_private, dp_display);
1574
1575         if (dp->is_edp)
1576                 dp_hpd_unplug_handle(dp_display, 0);
1577
1578         mutex_lock(&dp_display->event_mutex);
1579
1580         state = dp_display->hpd_state;
1581         if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED)
1582                 drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
1583                            dp->connector_type, state);
1584
1585         dp_display_disable(dp_display);
1586
1587         state =  dp_display->hpd_state;
1588         if (state == ST_DISCONNECT_PENDING) {
1589                 /* completed disconnection */
1590                 dp_display->hpd_state = ST_DISCONNECTED;
1591         } else {
1592                 dp_display->hpd_state = ST_DISPLAY_OFF;
1593         }
1594
1595         drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1596
1597         pm_runtime_put_sync(&dp->pdev->dev);
1598         mutex_unlock(&dp_display->event_mutex);
1599 }
1600
1601 void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
1602                         const struct drm_display_mode *mode,
1603                         const struct drm_display_mode *adjusted_mode)
1604 {
1605         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1606         struct msm_dp *dp = dp_bridge->dp_display;
1607         struct dp_display_private *dp_display;
1608         struct dp_panel *dp_panel;
1609
1610         dp_display = container_of(dp, struct dp_display_private, dp_display);
1611         dp_panel = dp_display->panel;
1612
1613         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1614
1615         if (dp_display_check_video_test(dp))
1616                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1617         else /* Default num_components per pixel = 3 */
1618                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1619
1620         if (!dp_display->dp_mode.bpp)
1621                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1622
1623         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1624
1625         dp_display->dp_mode.v_active_low =
1626                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1627
1628         dp_display->dp_mode.h_active_low =
1629                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1630
1631         dp_display->dp_mode.out_fmt_is_yuv_420 =
1632                 drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) &&
1633                 dp_panel->vsc_sdp_supported;
1634
1635         /* populate wide_bus_support to different layers */
1636         dp_display->ctrl->wide_bus_en =
1637                 dp_display->dp_mode.out_fmt_is_yuv_420 ? false : dp_display->wide_bus_supported;
1638         dp_display->catalog->wide_bus_en =
1639                 dp_display->dp_mode.out_fmt_is_yuv_420 ? false : dp_display->wide_bus_supported;
1640 }
1641
1642 void dp_bridge_hpd_enable(struct drm_bridge *bridge)
1643 {
1644         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1645         struct msm_dp *dp_display = dp_bridge->dp_display;
1646         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1647
1648         /*
1649          * this is for external DP with hpd irq enabled case,
1650          * step-1: dp_pm_runtime_resume() enable dp host only
1651          * step-2: enable hdp block and have hpd irq enabled here
1652          * step-3: waiting for plugin irq while phy is not initialized
1653          * step-4: DP PHY is initialized at plugin handler before link training
1654          *
1655          */
1656         mutex_lock(&dp->event_mutex);
1657         if (pm_runtime_resume_and_get(&dp_display->pdev->dev)) {
1658                 DRM_ERROR("failed to resume power\n");
1659                 mutex_unlock(&dp->event_mutex);
1660                 return;
1661         }
1662
1663         dp_catalog_ctrl_hpd_enable(dp->catalog);
1664
1665         /* enable HDP interrupts */
1666         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true);
1667
1668         dp_display->internal_hpd = true;
1669         mutex_unlock(&dp->event_mutex);
1670 }
1671
1672 void dp_bridge_hpd_disable(struct drm_bridge *bridge)
1673 {
1674         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1675         struct msm_dp *dp_display = dp_bridge->dp_display;
1676         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1677
1678         mutex_lock(&dp->event_mutex);
1679         /* disable HDP interrupts */
1680         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
1681         dp_catalog_ctrl_hpd_disable(dp->catalog);
1682
1683         dp_display->internal_hpd = false;
1684
1685         pm_runtime_put_sync(&dp_display->pdev->dev);
1686         mutex_unlock(&dp->event_mutex);
1687 }
1688
1689 void dp_bridge_hpd_notify(struct drm_bridge *bridge,
1690                           enum drm_connector_status status)
1691 {
1692         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1693         struct msm_dp *dp_display = dp_bridge->dp_display;
1694         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1695
1696         /* Without next_bridge interrupts are handled by the DP core directly */
1697         if (dp_display->internal_hpd)
1698                 return;
1699
1700         if (!dp_display->link_ready && status == connector_status_connected)
1701                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1702         else if (dp_display->link_ready && status == connector_status_disconnected)
1703                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1704 }