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         char *name;
  78         int irq;
  79
  80         unsigned int id;
  81
  82         /* state variables */
  83         bool core_initialized;
  84         bool phy_initialized;
  85         bool hpd_irq_on;
  86         bool audio_supported;
  87
  88         struct drm_device *drm_dev;
  89         struct dentry *root;
  90
  91         struct dp_catalog *catalog;
  92         struct drm_dp_aux *aux;
  93         struct dp_link    *link;
  94         struct dp_panel   *panel;
  95         struct dp_ctrl    *ctrl;
  96         struct dp_debug   *debug;
  97
  98         struct dp_display_mode dp_mode;
  99         struct msm_dp dp_display;
 100
 101         /* wait for audio signaling */
 102         struct completion audio_comp;
 103
 104         /* event related only access by event thread */
 105         struct mutex event_mutex;
 106         wait_queue_head_t event_q;
 107         u32 hpd_state;
 108         u32 event_pndx;
 109         u32 event_gndx;
 110         struct task_struct *ev_tsk;
 111         struct dp_event event_list[DP_EVENT_Q_MAX];
 112         spinlock_t event_lock;
 113
 114         bool wide_bus_supported;
 115
 116         struct dp_audio *audio;
 117 };
 118
 119 struct msm_dp_desc {
 120         phys_addr_t io_start;
 121         unsigned int id;
 122         unsigned int connector_type;
 123         bool wide_bus_supported;
 124 };
 125
 126 static const struct msm_dp_desc sc7180_dp_descs[] = {
 127         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
 128         {}
 129 };
 130
 131 static const struct msm_dp_desc sc7280_dp_descs[] = {
 132         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 133         { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_supported = true },
 134         {}
 135 };
 136
 137 static const struct msm_dp_desc sc8180x_dp_descs[] = {
 138         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
 139         { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
 140         { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP },
 141         {}
 142 };
 143
 144 static const struct msm_dp_desc sc8280xp_dp_descs[] = {
 145         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 146         { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 147         { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 148         { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 149         { .io_start = 0x22090000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 150         { .io_start = 0x22098000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 151         { .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 152         { .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_supported = true },
 153         {}
 154 };
 155
 156 static const struct msm_dp_desc sc8280xp_edp_descs[] = {
 157         { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_supported = true },
 158         { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_supported = true },
 159         { .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_supported = true },
 160         { .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_supported = true },
 161         {}
 162 };
 163
 164 static const struct msm_dp_desc sm8350_dp_descs[] = {
 165         { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
 166         {}
 167 };
 168
 169 static const struct msm_dp_desc sm8650_dp_descs[] = {
 170         { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
 171         {}
 172 };
 173
 174 static const struct of_device_id dp_dt_match[] = {
 175         { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_descs },
 176         { .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_descs },
 177         { .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_descs },
 178         { .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_descs },
 179         { .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_descs },
 180         { .compatible = "qcom,sc8280xp-dp", .data = &sc8280xp_dp_descs },
 181         { .compatible = "qcom,sc8280xp-edp", .data = &sc8280xp_edp_descs },
 182         { .compatible = "qcom,sdm845-dp", .data = &sc7180_dp_descs },
 183         { .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_descs },
 184         { .compatible = "qcom,sm8650-dp", .data = &sm8650_dp_descs },
 185         {}
 186 };
 187
 188 static struct dp_display_private *dev_get_dp_display_private(struct device *dev)
 189 {
 190         struct msm_dp *dp = dev_get_drvdata(dev);
 191
 192         return container_of(dp, struct dp_display_private, dp_display);
 193 }
 194
 195 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
 196                                                 u32 data, u32 delay)
 197 {
 198         unsigned long flag;
 199         struct dp_event *todo;
 200         int pndx;
 201
 202         spin_lock_irqsave(&dp_priv->event_lock, flag);
 203         pndx = dp_priv->event_pndx + 1;
 204         pndx %= DP_EVENT_Q_MAX;
 205         if (pndx == dp_priv->event_gndx) {
 206                 pr_err("event_q is full: pndx=%d gndx=%d\n",
 207                         dp_priv->event_pndx, dp_priv->event_gndx);
 208                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 209                 return -EPERM;
 210         }
 211         todo = &dp_priv->event_list[dp_priv->event_pndx++];
 212         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
 213         todo->event_id = event;
 214         todo->data = data;
 215         todo->delay = delay;
 216         wake_up(&dp_priv->event_q);
 217         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 218
 219         return 0;
 220 }
 221
 222 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
 223 {
 224         unsigned long flag;
 225         struct dp_event *todo;
 226         u32     gndx;
 227
 228         spin_lock_irqsave(&dp_priv->event_lock, flag);
 229         if (dp_priv->event_pndx == dp_priv->event_gndx) {
 230                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 231                 return -ENOENT;
 232         }
 233
 234         gndx = dp_priv->event_gndx;
 235         while (dp_priv->event_pndx != gndx) {
 236                 todo = &dp_priv->event_list[gndx];
 237                 if (todo->event_id == event) {
 238                         todo->event_id = EV_NO_EVENT;   /* deleted */
 239                         todo->delay = 0;
 240                 }
 241                 gndx++;
 242                 gndx %= DP_EVENT_Q_MAX;
 243         }
 244         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 245
 246         return 0;
 247 }
 248
 249 void dp_display_signal_audio_start(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         reinit_completion(&dp->audio_comp);
 256 }
 257
 258 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
 259 {
 260         struct dp_display_private *dp;
 261
 262         dp = container_of(dp_display, struct dp_display_private, dp_display);
 263
 264         complete_all(&dp->audio_comp);
 265 }
 266
 267 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv);
 268
 269 static int dp_display_bind(struct device *dev, struct device *master,
 270                            void *data)
 271 {
 272         int rc = 0;
 273         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 274         struct msm_drm_private *priv = dev_get_drvdata(master);
 275         struct drm_device *drm = priv->dev;
 276
 277         dp->dp_display.drm_dev = drm;
 278         priv->dp[dp->id] = &dp->dp_display;
 279
 280
 281
 282         dp->drm_dev = drm;
 283         dp->aux->drm_dev = drm;
 284         rc = dp_aux_register(dp->aux);
 285         if (rc) {
 286                 DRM_ERROR("DRM DP AUX register failed\n");
 287                 goto end;
 288         }
 289
 290
 291         rc = dp_register_audio_driver(dev, dp->audio);
 292         if (rc) {
 293                 DRM_ERROR("Audio registration Dp failed\n");
 294                 goto end;
 295         }
 296
 297         rc = dp_hpd_event_thread_start(dp);
 298         if (rc) {
 299                 DRM_ERROR("Event thread create failed\n");
 300                 goto end;
 301         }
 302
 303         return 0;
 304 end:
 305         return rc;
 306 }
 307
 308 static void dp_display_unbind(struct device *dev, struct device *master,
 309                               void *data)
 310 {
 311         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 312         struct msm_drm_private *priv = dev_get_drvdata(master);
 313
 314         kthread_stop(dp->ev_tsk);
 315
 316         of_dp_aux_depopulate_bus(dp->aux);
 317
 318         dp_unregister_audio_driver(dev, dp->audio);
 319         dp_aux_unregister(dp->aux);
 320         dp->drm_dev = NULL;
 321         dp->aux->drm_dev = NULL;
 322         priv->dp[dp->id] = NULL;
 323 }
 324
 325 static const struct component_ops dp_display_comp_ops = {
 326         .bind = dp_display_bind,
 327         .unbind = dp_display_unbind,
 328 };
 329
 330 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
 331 {
 332         struct dp_display_private *dp;
 333         struct drm_connector *connector;
 334
 335         dp = container_of(dp_display, struct dp_display_private, dp_display);
 336
 337         connector = dp->dp_display.connector;
 338         drm_helper_hpd_irq_event(connector->dev);
 339 }
 340
 341 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 342                                             bool hpd)
 343 {
 344         if ((hpd && dp->dp_display.link_ready) ||
 345                         (!hpd && !dp->dp_display.link_ready)) {
 346                 drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
 347                                 (hpd ? "on" : "off"));
 348                 return 0;
 349         }
 350
 351         /* reset video pattern flag on disconnect */
 352         if (!hpd) {
 353                 dp->panel->video_test = false;
 354                 if (!dp->dp_display.is_edp)
 355                         drm_dp_set_subconnector_property(dp->dp_display.connector,
 356                                                          connector_status_disconnected,
 357                                                          dp->panel->dpcd,
 358                                                          dp->panel->downstream_ports);
 359         }
 360
 361         dp->dp_display.link_ready = hpd;
 362
 363         drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
 364                         dp->dp_display.connector_type, hpd);
 365         dp_display_send_hpd_event(&dp->dp_display);
 366
 367         return 0;
 368 }
 369
 370 static int dp_display_process_hpd_high(struct dp_display_private *dp)
 371 {
 372         int rc = 0;
 373         struct edid *edid;
 374
 375         rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
 376         if (rc)
 377                 goto end;
 378
 379         dp_link_process_request(dp->link);
 380
 381         if (!dp->dp_display.is_edp)
 382                 drm_dp_set_subconnector_property(dp->dp_display.connector,
 383                                                  connector_status_connected,
 384                                                  dp->panel->dpcd,
 385                                                  dp->panel->downstream_ports);
 386
 387         edid = dp->panel->edid;
 388
 389         dp->dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
 390
 391         dp->audio_supported = drm_detect_monitor_audio(edid);
 392         dp_panel_handle_sink_request(dp->panel);
 393
 394         /*
 395          * set sink to normal operation mode -- D0
 396          * before dpcd read
 397          */
 398         dp_link_psm_config(dp->link, &dp->panel->link_info, false);
 399
 400         dp_link_reset_phy_params_vx_px(dp->link);
 401         rc = dp_ctrl_on_link(dp->ctrl);
 402         if (rc) {
 403                 DRM_ERROR("failed to complete DP link training\n");
 404                 goto end;
 405         }
 406
 407         dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
 408
 409 end:
 410         return rc;
 411 }
 412
 413 static void dp_display_host_phy_init(struct dp_display_private *dp)
 414 {
 415         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 416                 dp->dp_display.connector_type, dp->core_initialized,
 417                 dp->phy_initialized);
 418
 419         if (!dp->phy_initialized) {
 420                 dp_ctrl_phy_init(dp->ctrl);
 421                 dp->phy_initialized = true;
 422         }
 423 }
 424
 425 static void dp_display_host_phy_exit(struct dp_display_private *dp)
 426 {
 427         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 428                 dp->dp_display.connector_type, dp->core_initialized,
 429                 dp->phy_initialized);
 430
 431         if (dp->phy_initialized) {
 432                 dp_ctrl_phy_exit(dp->ctrl);
 433                 dp->phy_initialized = false;
 434         }
 435 }
 436
 437 static void dp_display_host_init(struct dp_display_private *dp)
 438 {
 439         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 440                 dp->dp_display.connector_type, dp->core_initialized,
 441                 dp->phy_initialized);
 442
 443         dp_ctrl_core_clk_enable(dp->ctrl);
 444         dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
 445         dp_aux_init(dp->aux);
 446         dp->core_initialized = true;
 447 }
 448
 449 static void dp_display_host_deinit(struct dp_display_private *dp)
 450 {
 451         drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
 452                 dp->dp_display.connector_type, dp->core_initialized,
 453                 dp->phy_initialized);
 454
 455         dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
 456         dp_aux_deinit(dp->aux);
 457         dp_ctrl_core_clk_disable(dp->ctrl);
 458         dp->core_initialized = false;
 459 }
 460
 461 static int dp_display_usbpd_configure_cb(struct device *dev)
 462 {
 463         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 464
 465         dp_display_host_phy_init(dp);
 466
 467         return dp_display_process_hpd_high(dp);
 468 }
 469
 470 static int dp_display_notify_disconnect(struct device *dev)
 471 {
 472         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 473
 474         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 475
 476         return 0;
 477 }
 478
 479 static void dp_display_handle_video_request(struct dp_display_private *dp)
 480 {
 481         if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
 482                 dp->panel->video_test = true;
 483                 dp_link_send_test_response(dp->link);
 484         }
 485 }
 486
 487 static int dp_display_handle_port_status_changed(struct dp_display_private *dp)
 488 {
 489         int rc = 0;
 490
 491         if (drm_dp_is_branch(dp->panel->dpcd) && dp->link->sink_count == 0) {
 492                 drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n");
 493                 if (dp->hpd_state != ST_DISCONNECTED) {
 494                         dp->hpd_state = ST_DISCONNECT_PENDING;
 495                         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 496                 }
 497         } else {
 498                 if (dp->hpd_state == ST_DISCONNECTED) {
 499                         dp->hpd_state = ST_MAINLINK_READY;
 500                         rc = dp_display_process_hpd_high(dp);
 501                         if (rc)
 502                                 dp->hpd_state = ST_DISCONNECTED;
 503                 }
 504         }
 505
 506         return rc;
 507 }
 508
 509 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
 510 {
 511         u32 sink_request = dp->link->sink_request;
 512
 513         drm_dbg_dp(dp->drm_dev, "%d\n", sink_request);
 514         if (dp->hpd_state == ST_DISCONNECTED) {
 515                 if (sink_request & DP_LINK_STATUS_UPDATED) {
 516                         drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n",
 517                                                         sink_request);
 518                         DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
 519                         return -EINVAL;
 520                 }
 521         }
 522
 523         dp_ctrl_handle_sink_request(dp->ctrl);
 524
 525         if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
 526                 dp_display_handle_video_request(dp);
 527
 528         return 0;
 529 }
 530
 531 static int dp_display_usbpd_attention_cb(struct device *dev)
 532 {
 533         int rc = 0;
 534         u32 sink_request;
 535         struct dp_display_private *dp = dev_get_dp_display_private(dev);
 536
 537         /* check for any test request issued by sink */
 538         rc = dp_link_process_request(dp->link);
 539         if (!rc) {
 540                 sink_request = dp->link->sink_request;
 541                 drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n",
 542                                         dp->hpd_state, sink_request);
 543                 if (sink_request & DS_PORT_STATUS_CHANGED)
 544                         rc = dp_display_handle_port_status_changed(dp);
 545                 else
 546                         rc = dp_display_handle_irq_hpd(dp);
 547         }
 548
 549         return rc;
 550 }
 551
 552 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 553 {
 554         u32 state;
 555         int ret;
 556         struct platform_device *pdev = dp->dp_display.pdev;
 557
 558         mutex_lock(&dp->event_mutex);
 559
 560         state =  dp->hpd_state;
 561         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 562                         dp->dp_display.connector_type, state);
 563
 564         if (state == ST_DISPLAY_OFF) {
 565                 mutex_unlock(&dp->event_mutex);
 566                 return 0;
 567         }
 568
 569         if (state == ST_MAINLINK_READY || state == ST_CONNECTED) {
 570                 mutex_unlock(&dp->event_mutex);
 571                 return 0;
 572         }
 573
 574         if (state == ST_DISCONNECT_PENDING) {
 575                 /* wait until ST_DISCONNECTED */
 576                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
 577                 mutex_unlock(&dp->event_mutex);
 578                 return 0;
 579         }
 580
 581         ret = pm_runtime_resume_and_get(&pdev->dev);
 582         if (ret) {
 583                 DRM_ERROR("failed to pm_runtime_resume\n");
 584                 mutex_unlock(&dp->event_mutex);
 585                 return ret;
 586         }
 587
 588         ret = dp_display_usbpd_configure_cb(&pdev->dev);
 589         if (ret) {      /* link train failed */
 590                 dp->hpd_state = ST_DISCONNECTED;
 591                 pm_runtime_put_sync(&pdev->dev);
 592         } else {
 593                 dp->hpd_state = ST_MAINLINK_READY;
 594         }
 595
 596         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 597                         dp->dp_display.connector_type, state);
 598         mutex_unlock(&dp->event_mutex);
 599
 600         /* uevent will complete connection part */
 601         return 0;
 602 };
 603
 604 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 605                 bool plugged)
 606 {
 607         struct dp_display_private *dp;
 608
 609         dp = container_of(dp_display,
 610                         struct dp_display_private, dp_display);
 611
 612         /* notify audio subsystem only if sink supports audio */
 613         if (dp_display->plugged_cb && dp_display->codec_dev &&
 614                         dp->audio_supported)
 615                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 616 }
 617
 618 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 619 {
 620         u32 state;
 621         struct platform_device *pdev = dp->dp_display.pdev;
 622
 623         mutex_lock(&dp->event_mutex);
 624
 625         state = dp->hpd_state;
 626
 627         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 628                         dp->dp_display.connector_type, state);
 629
 630         /* unplugged, no more irq_hpd handle */
 631         dp_del_event(dp, EV_IRQ_HPD_INT);
 632
 633         if (state == ST_DISCONNECTED) {
 634                 /* triggered by irq_hdp with sink_count = 0 */
 635                 if (dp->link->sink_count == 0) {
 636                         dp_display_host_phy_exit(dp);
 637                 }
 638                 dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 639                 mutex_unlock(&dp->event_mutex);
 640                 return 0;
 641         } else if (state == ST_DISCONNECT_PENDING) {
 642                 mutex_unlock(&dp->event_mutex);
 643                 return 0;
 644         } else if (state == ST_MAINLINK_READY) {
 645                 dp_ctrl_off_link(dp->ctrl);
 646                 dp_display_host_phy_exit(dp);
 647                 dp->hpd_state = ST_DISCONNECTED;
 648                 dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 649                 pm_runtime_put_sync(&pdev->dev);
 650                 mutex_unlock(&dp->event_mutex);
 651                 return 0;
 652         }
 653
 654         /*
 655          * We don't need separate work for disconnect as
 656          * connect/attention interrupts are disabled
 657          */
 658         dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 659
 660         if (state == ST_DISPLAY_OFF) {
 661                 dp->hpd_state = ST_DISCONNECTED;
 662         } else {
 663                 dp->hpd_state = ST_DISCONNECT_PENDING;
 664         }
 665
 666         /* signal the disconnect event early to ensure proper teardown */
 667         dp_display_handle_plugged_change(&dp->dp_display, false);
 668
 669         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 670                         dp->dp_display.connector_type, state);
 671
 672         /* uevent will complete disconnection part */
 673         pm_runtime_put_sync(&pdev->dev);
 674         mutex_unlock(&dp->event_mutex);
 675         return 0;
 676 }
 677
 678 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 679 {
 680         u32 state;
 681
 682         mutex_lock(&dp->event_mutex);
 683
 684         /* irq_hpd can happen at either connected or disconnected state */
 685         state =  dp->hpd_state;
 686         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 687                         dp->dp_display.connector_type, state);
 688
 689         if (state == ST_DISPLAY_OFF) {
 690                 mutex_unlock(&dp->event_mutex);
 691                 return 0;
 692         }
 693
 694         if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
 695                 /* wait until ST_CONNECTED */
 696                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 697                 mutex_unlock(&dp->event_mutex);
 698                 return 0;
 699         }
 700
 701         dp_display_usbpd_attention_cb(&dp->dp_display.pdev->dev);
 702
 703         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 704                         dp->dp_display.connector_type, state);
 705
 706         mutex_unlock(&dp->event_mutex);
 707
 708         return 0;
 709 }
 710
 711 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 712 {
 713         dp_audio_put(dp->audio);
 714         dp_panel_put(dp->panel);
 715         dp_aux_put(dp->aux);
 716 }
 717
 718 static int dp_init_sub_modules(struct dp_display_private *dp)
 719 {
 720         int rc = 0;
 721         struct device *dev = &dp->dp_display.pdev->dev;
 722         struct dp_panel_in panel_in = {
 723                 .dev = dev,
 724         };
 725         struct phy *phy;
 726
 727         phy = devm_phy_get(dev, "dp");
 728         if (IS_ERR(phy))
 729                 return PTR_ERR(phy);
 730
 731         dp->catalog = dp_catalog_get(dev);
 732         if (IS_ERR(dp->catalog)) {
 733                 rc = PTR_ERR(dp->catalog);
 734                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 735                 dp->catalog = NULL;
 736                 goto error;
 737         }
 738
 739         dp->aux = dp_aux_get(dev, dp->catalog,
 740                              phy,
 741                              dp->dp_display.is_edp);
 742         if (IS_ERR(dp->aux)) {
 743                 rc = PTR_ERR(dp->aux);
 744                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 745                 dp->aux = NULL;
 746                 goto error;
 747         }
 748
 749         dp->link = dp_link_get(dev, dp->aux);
 750         if (IS_ERR(dp->link)) {
 751                 rc = PTR_ERR(dp->link);
 752                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 753                 dp->link = NULL;
 754                 goto error_link;
 755         }
 756
 757         panel_in.aux = dp->aux;
 758         panel_in.catalog = dp->catalog;
 759         panel_in.link = dp->link;
 760
 761         dp->panel = dp_panel_get(&panel_in);
 762         if (IS_ERR(dp->panel)) {
 763                 rc = PTR_ERR(dp->panel);
 764                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 765                 dp->panel = NULL;
 766                 goto error_link;
 767         }
 768
 769         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 770                                dp->catalog,
 771                                phy);
 772         if (IS_ERR(dp->ctrl)) {
 773                 rc = PTR_ERR(dp->ctrl);
 774                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 775                 dp->ctrl = NULL;
 776                 goto error_ctrl;
 777         }
 778
 779         dp->audio = dp_audio_get(dp->dp_display.pdev, dp->panel, dp->catalog);
 780         if (IS_ERR(dp->audio)) {
 781                 rc = PTR_ERR(dp->audio);
 782                 pr_err("failed to initialize audio, rc = %d\n", rc);
 783                 dp->audio = NULL;
 784                 goto error_ctrl;
 785         }
 786
 787         return rc;
 788
 789 error_ctrl:
 790         dp_panel_put(dp->panel);
 791 error_link:
 792         dp_aux_put(dp->aux);
 793 error:
 794         return rc;
 795 }
 796
 797 static int dp_display_set_mode(struct msm_dp *dp_display,
 798                                struct dp_display_mode *mode)
 799 {
 800         struct dp_display_private *dp;
 801
 802         dp = container_of(dp_display, struct dp_display_private, dp_display);
 803
 804         drm_mode_copy(&dp->panel->dp_mode.drm_mode, &mode->drm_mode);
 805         dp->panel->dp_mode.bpp = mode->bpp;
 806         dp->panel->dp_mode.capabilities = mode->capabilities;
 807         dp->panel->dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420;
 808         dp_panel_init_panel_info(dp->panel);
 809         return 0;
 810 }
 811
 812 static int dp_display_enable(struct dp_display_private *dp, bool force_link_train)
 813 {
 814         int rc = 0;
 815         struct msm_dp *dp_display = &dp->dp_display;
 816
 817         drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
 818         if (dp_display->power_on) {
 819                 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
 820                 return 0;
 821         }
 822
 823         rc = dp_ctrl_on_stream(dp->ctrl, force_link_train);
 824         if (!rc)
 825                 dp_display->power_on = true;
 826
 827         return rc;
 828 }
 829
 830 static int dp_display_post_enable(struct msm_dp *dp_display)
 831 {
 832         struct dp_display_private *dp;
 833         u32 rate;
 834
 835         dp = container_of(dp_display, struct dp_display_private, dp_display);
 836
 837         rate = dp->link->link_params.rate;
 838
 839         if (dp->audio_supported) {
 840                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 841                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 842         }
 843
 844         /* signal the connect event late to synchronize video and display */
 845         dp_display_handle_plugged_change(dp_display, true);
 846
 847         if (dp_display->psr_supported)
 848                 dp_ctrl_config_psr(dp->ctrl);
 849
 850         return 0;
 851 }
 852
 853 static int dp_display_disable(struct dp_display_private *dp)
 854 {
 855         struct msm_dp *dp_display = &dp->dp_display;
 856
 857         if (!dp_display->power_on)
 858                 return 0;
 859
 860         /* wait only if audio was enabled */
 861         if (dp_display->audio_enabled) {
 862                 /* signal the disconnect event */
 863                 dp_display_handle_plugged_change(dp_display, false);
 864                 if (!wait_for_completion_timeout(&dp->audio_comp,
 865                                 HZ * 5))
 866                         DRM_ERROR("audio comp timeout\n");
 867         }
 868
 869         dp_display->audio_enabled = false;
 870
 871         if (dp->link->sink_count == 0) {
 872                 /*
 873                  * irq_hpd with sink_count = 0
 874                  * hdmi unplugged out of dongle
 875                  */
 876                 dp_ctrl_off_link_stream(dp->ctrl);
 877         } else {
 878                 /*
 879                  * unplugged interrupt
 880                  * dongle unplugged out of DUT
 881                  */
 882                 dp_ctrl_off(dp->ctrl);
 883                 dp_display_host_phy_exit(dp);
 884         }
 885
 886         dp_display->power_on = false;
 887
 888         drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
 889         return 0;
 890 }
 891
 892 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 893                 hdmi_codec_plugged_cb fn, struct device *codec_dev)
 894 {
 895         bool plugged;
 896
 897         dp_display->plugged_cb = fn;
 898         dp_display->codec_dev = codec_dev;
 899         plugged = dp_display->link_ready;
 900         dp_display_handle_plugged_change(dp_display, plugged);
 901
 902         return 0;
 903 }
 904
 905 /**
 906  * dp_bridge_mode_valid - callback to determine if specified mode is valid
 907  * @bridge: Pointer to drm bridge structure
 908  * @info: display info
 909  * @mode: Pointer to drm mode structure
 910  * Returns: Validity status for specified mode
 911  */
 912 enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
 913                                           const struct drm_display_info *info,
 914                                           const struct drm_display_mode *mode)
 915 {
 916         const u32 num_components = 3, default_bpp = 24;
 917         struct dp_display_private *dp_display;
 918         struct dp_link_info *link_info;
 919         u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
 920         struct msm_dp *dp;
 921         int mode_pclk_khz = mode->clock;
 922
 923         dp = to_dp_bridge(bridge)->dp_display;
 924
 925         if (!dp || !mode_pclk_khz || !dp->connector) {
 926                 DRM_ERROR("invalid params\n");
 927                 return -EINVAL;
 928         }
 929
 930         if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)
 931                 return MODE_CLOCK_HIGH;
 932
 933         dp_display = container_of(dp, struct dp_display_private, dp_display);
 934         link_info = &dp_display->panel->link_info;
 935
 936         if (drm_mode_is_420_only(&dp->connector->display_info, mode) &&
 937             dp_display->panel->vsc_sdp_supported)
 938                 mode_pclk_khz /= 2;
 939
 940         mode_bpp = dp->connector->display_info.bpc * num_components;
 941         if (!mode_bpp)
 942                 mode_bpp = default_bpp;
 943
 944         mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
 945                         mode_bpp, mode_pclk_khz);
 946
 947         mode_rate_khz = mode_pclk_khz * mode_bpp;
 948         supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
 949
 950         if (mode_rate_khz > supported_rate_khz)
 951                 return MODE_BAD;
 952
 953         return MODE_OK;
 954 }
 955
 956 int dp_display_get_modes(struct msm_dp *dp)
 957 {
 958         struct dp_display_private *dp_display;
 959
 960         if (!dp) {
 961                 DRM_ERROR("invalid params\n");
 962                 return 0;
 963         }
 964
 965         dp_display = container_of(dp, struct dp_display_private, dp_display);
 966
 967         return dp_panel_get_modes(dp_display->panel,
 968                 dp->connector);
 969 }
 970
 971 bool dp_display_check_video_test(struct msm_dp *dp)
 972 {
 973         struct dp_display_private *dp_display;
 974
 975         dp_display = container_of(dp, struct dp_display_private, dp_display);
 976
 977         return dp_display->panel->video_test;
 978 }
 979
 980 int dp_display_get_test_bpp(struct msm_dp *dp)
 981 {
 982         struct dp_display_private *dp_display;
 983
 984         if (!dp) {
 985                 DRM_ERROR("invalid params\n");
 986                 return 0;
 987         }
 988
 989         dp_display = container_of(dp, struct dp_display_private, dp_display);
 990
 991         return dp_link_bit_depth_to_bpp(
 992                 dp_display->link->test_video.test_bit_depth);
 993 }
 994
 995 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
 996 {
 997         struct dp_display_private *dp_display;
 998
 999         dp_display = container_of(dp, struct dp_display_private, dp_display);
1000
1001         /*
1002          * if we are reading registers we need the link clocks to be on
1003          * however till DP cable is connected this will not happen as we
1004          * do not know the resolution to power up with. Hence check the
1005          * power_on status before dumping DP registers to avoid crash due
1006          * to unclocked access
1007          */
1008         mutex_lock(&dp_display->event_mutex);
1009
1010         if (!dp->power_on) {
1011                 mutex_unlock(&dp_display->event_mutex);
1012                 return;
1013         }
1014
1015         dp_catalog_snapshot(dp_display->catalog, disp_state);
1016
1017         mutex_unlock(&dp_display->event_mutex);
1018 }
1019
1020 void dp_display_set_psr(struct msm_dp *dp_display, bool enter)
1021 {
1022         struct dp_display_private *dp;
1023
1024         if (!dp_display) {
1025                 DRM_ERROR("invalid params\n");
1026                 return;
1027         }
1028
1029         dp = container_of(dp_display, struct dp_display_private, dp_display);
1030         dp_ctrl_set_psr(dp->ctrl, enter);
1031 }
1032
1033 static int hpd_event_thread(void *data)
1034 {
1035         struct dp_display_private *dp_priv;
1036         unsigned long flag;
1037         struct dp_event *todo;
1038         int timeout_mode = 0;
1039
1040         dp_priv = (struct dp_display_private *)data;
1041
1042         while (1) {
1043                 if (timeout_mode) {
1044                         wait_event_timeout(dp_priv->event_q,
1045                                 (dp_priv->event_pndx == dp_priv->event_gndx) ||
1046                                         kthread_should_stop(), EVENT_TIMEOUT);
1047                 } else {
1048                         wait_event_interruptible(dp_priv->event_q,
1049                                 (dp_priv->event_pndx != dp_priv->event_gndx) ||
1050                                         kthread_should_stop());
1051                 }
1052
1053                 if (kthread_should_stop())
1054                         break;
1055
1056                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1057                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1058                 if (todo->delay) {
1059                         struct dp_event *todo_next;
1060
1061                         dp_priv->event_gndx++;
1062                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1063
1064                         /* re enter delay event into q */
1065                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1066                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1067                         todo_next->event_id = todo->event_id;
1068                         todo_next->data = todo->data;
1069                         todo_next->delay = todo->delay - 1;
1070
1071                         /* clean up older event */
1072                         todo->event_id = EV_NO_EVENT;
1073                         todo->delay = 0;
1074
1075                         /* switch to timeout mode */
1076                         timeout_mode = 1;
1077                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1078                         continue;
1079                 }
1080
1081                 /* timeout with no events in q */
1082                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1083                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1084                         continue;
1085                 }
1086
1087                 dp_priv->event_gndx++;
1088                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1089                 timeout_mode = 0;
1090                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1091
1092                 switch (todo->event_id) {
1093                 case EV_HPD_PLUG_INT:
1094                         dp_hpd_plug_handle(dp_priv, todo->data);
1095                         break;
1096                 case EV_HPD_UNPLUG_INT:
1097                         dp_hpd_unplug_handle(dp_priv, todo->data);
1098                         break;
1099                 case EV_IRQ_HPD_INT:
1100                         dp_irq_hpd_handle(dp_priv, todo->data);
1101                         break;
1102                 case EV_USER_NOTIFICATION:
1103                         dp_display_send_hpd_notification(dp_priv,
1104                                                 todo->data);
1105                         break;
1106                 default:
1107                         break;
1108                 }
1109         }
1110
1111         return 0;
1112 }
1113
1114 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv)
1115 {
1116         /* set event q to empty */
1117         dp_priv->event_gndx = 0;
1118         dp_priv->event_pndx = 0;
1119
1120         dp_priv->ev_tsk = kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1121         if (IS_ERR(dp_priv->ev_tsk))
1122                 return PTR_ERR(dp_priv->ev_tsk);
1123
1124         return 0;
1125 }
1126
1127 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1128 {
1129         struct dp_display_private *dp = dev_id;
1130         irqreturn_t ret = IRQ_NONE;
1131         u32 hpd_isr_status;
1132
1133         if (!dp) {
1134                 DRM_ERROR("invalid data\n");
1135                 return IRQ_NONE;
1136         }
1137
1138         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1139
1140         if (hpd_isr_status & 0x0F) {
1141                 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
1142                         dp->dp_display.connector_type, hpd_isr_status);
1143                 /* hpd related interrupts */
1144                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1145                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1146
1147                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1148                         dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1149                 }
1150
1151                 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1152                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1153                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1154                 }
1155
1156                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1157                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1158
1159                 ret = IRQ_HANDLED;
1160         }
1161
1162         /* DP controller isr */
1163         ret |= dp_ctrl_isr(dp->ctrl);
1164
1165         /* DP aux isr */
1166         ret |= dp_aux_isr(dp->aux);
1167
1168         return ret;
1169 }
1170
1171 static int dp_display_request_irq(struct dp_display_private *dp)
1172 {
1173         int rc = 0;
1174         struct platform_device *pdev = dp->dp_display.pdev;
1175
1176         dp->irq = platform_get_irq(pdev, 0);
1177         if (dp->irq < 0) {
1178                 DRM_ERROR("failed to get irq\n");
1179                 return dp->irq;
1180         }
1181
1182         rc = devm_request_irq(&pdev->dev, dp->irq, dp_display_irq_handler,
1183                               IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN,
1184                               "dp_display_isr", dp);
1185
1186         if (rc < 0) {
1187                 DRM_ERROR("failed to request IRQ%u: %d\n",
1188                                 dp->irq, rc);
1189                 return rc;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
1196 {
1197         const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
1198         struct resource *res;
1199         int i;
1200
1201         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1202         if (!res)
1203                 return NULL;
1204
1205         for (i = 0; i < descs[i].io_start; i++) {
1206                 if (descs[i].io_start == res->start)
1207                         return &descs[i];
1208         }
1209
1210         dev_err(&pdev->dev, "unknown displayport instance\n");
1211         return NULL;
1212 }
1213
1214 static int dp_display_probe_tail(struct device *dev)
1215 {
1216         struct msm_dp *dp = dev_get_drvdata(dev);
1217         int ret;
1218
1219         /*
1220          * External bridges are mandatory for eDP interfaces: one has to
1221          * provide at least an eDP panel (which gets wrapped into panel-bridge).
1222          *
1223          * For DisplayPort interfaces external bridges are optional, so
1224          * silently ignore an error if one is not present (-ENODEV).
1225          */
1226         dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
1227         if (IS_ERR(dp->next_bridge)) {
1228                 ret = PTR_ERR(dp->next_bridge);
1229                 dp->next_bridge = NULL;
1230                 if (dp->is_edp || ret != -ENODEV)
1231                         return ret;
1232         }
1233
1234         ret = component_add(dev, &dp_display_comp_ops);
1235         if (ret)
1236                 DRM_ERROR("component add failed, rc=%d\n", ret);
1237
1238         return ret;
1239 }
1240
1241 static int dp_auxbus_done_probe(struct drm_dp_aux *aux)
1242 {
1243         return dp_display_probe_tail(aux->dev);
1244 }
1245
1246 static int dp_display_probe(struct platform_device *pdev)
1247 {
1248         int rc = 0;
1249         struct dp_display_private *dp;
1250         const struct msm_dp_desc *desc;
1251
1252         if (!pdev || !pdev->dev.of_node) {
1253                 DRM_ERROR("pdev not found\n");
1254                 return -ENODEV;
1255         }
1256
1257         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1258         if (!dp)
1259                 return -ENOMEM;
1260
1261         desc = dp_display_get_desc(pdev);
1262         if (!desc)
1263                 return -EINVAL;
1264
1265         dp->dp_display.pdev = pdev;
1266         dp->name = "drm_dp";
1267         dp->id = desc->id;
1268         dp->dp_display.connector_type = desc->connector_type;
1269         dp->wide_bus_supported = desc->wide_bus_supported;
1270         dp->dp_display.is_edp =
1271                 (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
1272
1273         rc = dp_init_sub_modules(dp);
1274         if (rc) {
1275                 DRM_ERROR("init sub module failed\n");
1276                 return -EPROBE_DEFER;
1277         }
1278
1279         /* setup event q */
1280         mutex_init(&dp->event_mutex);
1281         init_waitqueue_head(&dp->event_q);
1282         spin_lock_init(&dp->event_lock);
1283
1284         /* Store DP audio handle inside DP display */
1285         dp->dp_display.dp_audio = dp->audio;
1286
1287         init_completion(&dp->audio_comp);
1288
1289         platform_set_drvdata(pdev, &dp->dp_display);
1290
1291         rc = devm_pm_runtime_enable(&pdev->dev);
1292         if (rc)
1293                 goto err;
1294
1295         rc = dp_display_request_irq(dp);
1296         if (rc)
1297                 goto err;
1298
1299         if (dp->dp_display.is_edp) {
1300                 rc = devm_of_dp_aux_populate_bus(dp->aux, dp_auxbus_done_probe);
1301                 if (rc) {
1302                         DRM_ERROR("eDP auxbus population failed, rc=%d\n", rc);
1303                         goto err;
1304                 }
1305         } else {
1306                 rc = dp_display_probe_tail(&pdev->dev);
1307                 if (rc)
1308                         goto err;
1309         }
1310
1311         return rc;
1312
1313 err:
1314         dp_display_deinit_sub_modules(dp);
1315         return rc;
1316 }
1317
1318 static void dp_display_remove(struct platform_device *pdev)
1319 {
1320         struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
1321
1322         component_del(&pdev->dev, &dp_display_comp_ops);
1323         dp_display_deinit_sub_modules(dp);
1324         platform_set_drvdata(pdev, NULL);
1325 }
1326
1327 static int dp_pm_runtime_suspend(struct device *dev)
1328 {
1329         struct dp_display_private *dp = dev_get_dp_display_private(dev);
1330
1331         disable_irq(dp->irq);
1332
1333         if (dp->dp_display.is_edp) {
1334                 dp_display_host_phy_exit(dp);
1335                 dp_catalog_ctrl_hpd_disable(dp->catalog);
1336         }
1337         dp_display_host_deinit(dp);
1338
1339         return 0;
1340 }
1341
1342 static int dp_pm_runtime_resume(struct device *dev)
1343 {
1344         struct dp_display_private *dp = dev_get_dp_display_private(dev);
1345
1346         /*
1347          * for eDP, host cotroller, HPD block and PHY are enabled here
1348          * but with HPD irq disabled
1349          *
1350          * for DP, only host controller is enabled here.
1351          * HPD block is enabled at dp_bridge_hpd_enable()
1352          * PHY will be enabled at plugin handler later
1353          */
1354         dp_display_host_init(dp);
1355         if (dp->dp_display.is_edp) {
1356                 dp_catalog_ctrl_hpd_enable(dp->catalog);
1357                 dp_display_host_phy_init(dp);
1358         }
1359
1360         enable_irq(dp->irq);
1361         return 0;
1362 }
1363
1364 static const struct dev_pm_ops dp_pm_ops = {
1365         SET_RUNTIME_PM_OPS(dp_pm_runtime_suspend, dp_pm_runtime_resume, NULL)
1366         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1367                                 pm_runtime_force_resume)
1368 };
1369
1370 static struct platform_driver dp_display_driver = {
1371         .probe  = dp_display_probe,
1372         .remove_new = dp_display_remove,
1373         .driver = {
1374                 .name = "msm-dp-display",
1375                 .of_match_table = dp_dt_match,
1376                 .suppress_bind_attrs = true,
1377                 .pm = &dp_pm_ops,
1378         },
1379 };
1380
1381 int __init msm_dp_register(void)
1382 {
1383         int ret;
1384
1385         ret = platform_driver_register(&dp_display_driver);
1386         if (ret)
1387                 DRM_ERROR("Dp display driver register failed");
1388
1389         return ret;
1390 }
1391
1392 void __exit msm_dp_unregister(void)
1393 {
1394         platform_driver_unregister(&dp_display_driver);
1395 }
1396
1397 bool msm_dp_is_yuv_420_enabled(const struct msm_dp *dp_display,
1398                                const struct drm_display_mode *mode)
1399 {
1400         struct dp_display_private *dp;
1401         const struct drm_display_info *info;
1402
1403         dp = container_of(dp_display, struct dp_display_private, dp_display);
1404         info = &dp_display->connector->display_info;
1405
1406         return dp->panel->vsc_sdp_supported && drm_mode_is_420_only(info, mode);
1407 }
1408
1409 bool msm_dp_needs_periph_flush(const struct msm_dp *dp_display,
1410                                const struct drm_display_mode *mode)
1411 {
1412         return msm_dp_is_yuv_420_enabled(dp_display, mode);
1413 }
1414
1415 bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
1416 {
1417         struct dp_display_private *dp;
1418
1419         dp = container_of(dp_display, struct dp_display_private, dp_display);
1420
1421         if (dp->dp_mode.out_fmt_is_yuv_420)
1422                 return false;
1423
1424         return dp->wide_bus_supported;
1425 }
1426
1427 void dp_display_debugfs_init(struct msm_dp *dp_display, struct dentry *root, bool is_edp)
1428 {
1429         struct dp_display_private *dp;
1430         struct device *dev;
1431         int rc;
1432
1433         dp = container_of(dp_display, struct dp_display_private, dp_display);
1434         dev = &dp->dp_display.pdev->dev;
1435
1436         dp->debug = dp_debug_get(dev, dp->panel,
1437                                         dp->link, dp->dp_display.connector,
1438                                         root, is_edp);
1439         if (IS_ERR(dp->debug)) {
1440                 rc = PTR_ERR(dp->debug);
1441                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1442                 dp->debug = NULL;
1443         }
1444 }
1445
1446 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1447                         struct drm_encoder *encoder, bool yuv_supported)
1448 {
1449         struct dp_display_private *dp_priv;
1450         int ret;
1451
1452         dp_display->drm_dev = dev;
1453
1454         dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
1455
1456         ret = dp_bridge_init(dp_display, dev, encoder);
1457         if (ret) {
1458                 DRM_DEV_ERROR(dev->dev,
1459                         "failed to create dp bridge: %d\n", ret);
1460                 return ret;
1461         }
1462
1463         dp_display->connector = dp_drm_connector_init(dp_display, encoder, yuv_supported);
1464         if (IS_ERR(dp_display->connector)) {
1465                 ret = PTR_ERR(dp_display->connector);
1466                 DRM_DEV_ERROR(dev->dev,
1467                         "failed to create dp connector: %d\n", ret);
1468                 dp_display->connector = NULL;
1469                 return ret;
1470         }
1471
1472         dp_priv->panel->connector = dp_display->connector;
1473
1474         return 0;
1475 }
1476
1477 void dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
1478                              struct drm_bridge_state *old_bridge_state)
1479 {
1480         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1481         struct msm_dp *dp = dp_bridge->dp_display;
1482         int rc = 0;
1483         struct dp_display_private *dp_display;
1484         u32 state;
1485         bool force_link_train = false;
1486
1487         dp_display = container_of(dp, struct dp_display_private, dp_display);
1488         if (!dp_display->dp_mode.drm_mode.clock) {
1489                 DRM_ERROR("invalid params\n");
1490                 return;
1491         }
1492
1493         if (dp->is_edp)
1494                 dp_hpd_plug_handle(dp_display, 0);
1495
1496         mutex_lock(&dp_display->event_mutex);
1497         if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
1498                 DRM_ERROR("failed to pm_runtime_resume\n");
1499                 mutex_unlock(&dp_display->event_mutex);
1500                 return;
1501         }
1502
1503         state = dp_display->hpd_state;
1504         if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
1505                 mutex_unlock(&dp_display->event_mutex);
1506                 return;
1507         }
1508
1509         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1510         if (rc) {
1511                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1512                 mutex_unlock(&dp_display->event_mutex);
1513                 return;
1514         }
1515
1516         state =  dp_display->hpd_state;
1517
1518         if (state == ST_DISPLAY_OFF) {
1519                 dp_display_host_phy_init(dp_display);
1520                 force_link_train = true;
1521         }
1522
1523         dp_display_enable(dp_display, force_link_train);
1524
1525         rc = dp_display_post_enable(dp);
1526         if (rc) {
1527                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1528                 dp_display_disable(dp_display);
1529         }
1530
1531         /* completed connection */
1532         dp_display->hpd_state = ST_CONNECTED;
1533
1534         drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1535         mutex_unlock(&dp_display->event_mutex);
1536 }
1537
1538 void dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
1539                               struct drm_bridge_state *old_bridge_state)
1540 {
1541         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1542         struct msm_dp *dp = dp_bridge->dp_display;
1543         struct dp_display_private *dp_display;
1544
1545         dp_display = container_of(dp, struct dp_display_private, dp_display);
1546
1547         dp_ctrl_push_idle(dp_display->ctrl);
1548 }
1549
1550 void dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
1551                                    struct drm_bridge_state *old_bridge_state)
1552 {
1553         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1554         struct msm_dp *dp = dp_bridge->dp_display;
1555         u32 state;
1556         struct dp_display_private *dp_display;
1557
1558         dp_display = container_of(dp, struct dp_display_private, dp_display);
1559
1560         if (dp->is_edp)
1561                 dp_hpd_unplug_handle(dp_display, 0);
1562
1563         mutex_lock(&dp_display->event_mutex);
1564
1565         state = dp_display->hpd_state;
1566         if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED)
1567                 drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
1568                            dp->connector_type, state);
1569
1570         dp_display_disable(dp_display);
1571
1572         state =  dp_display->hpd_state;
1573         if (state == ST_DISCONNECT_PENDING) {
1574                 /* completed disconnection */
1575                 dp_display->hpd_state = ST_DISCONNECTED;
1576         } else {
1577                 dp_display->hpd_state = ST_DISPLAY_OFF;
1578         }
1579
1580         drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1581
1582         pm_runtime_put_sync(&dp->pdev->dev);
1583         mutex_unlock(&dp_display->event_mutex);
1584 }
1585
1586 void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
1587                         const struct drm_display_mode *mode,
1588                         const struct drm_display_mode *adjusted_mode)
1589 {
1590         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1591         struct msm_dp *dp = dp_bridge->dp_display;
1592         struct dp_display_private *dp_display;
1593         struct dp_panel *dp_panel;
1594
1595         dp_display = container_of(dp, struct dp_display_private, dp_display);
1596         dp_panel = dp_display->panel;
1597
1598         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1599
1600         if (dp_display_check_video_test(dp))
1601                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1602         else /* Default num_components per pixel = 3 */
1603                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1604
1605         if (!dp_display->dp_mode.bpp)
1606                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1607
1608         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1609
1610         dp_display->dp_mode.v_active_low =
1611                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1612
1613         dp_display->dp_mode.h_active_low =
1614                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1615
1616         dp_display->dp_mode.out_fmt_is_yuv_420 =
1617                 drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) &&
1618                 dp_panel->vsc_sdp_supported;
1619
1620         /* populate wide_bus_support to different layers */
1621         dp_display->ctrl->wide_bus_en =
1622                 dp_display->dp_mode.out_fmt_is_yuv_420 ? false : dp_display->wide_bus_supported;
1623         dp_display->catalog->wide_bus_en =
1624                 dp_display->dp_mode.out_fmt_is_yuv_420 ? false : dp_display->wide_bus_supported;
1625 }
1626
1627 void dp_bridge_hpd_enable(struct drm_bridge *bridge)
1628 {
1629         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1630         struct msm_dp *dp_display = dp_bridge->dp_display;
1631         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1632
1633         /*
1634          * this is for external DP with hpd irq enabled case,
1635          * step-1: dp_pm_runtime_resume() enable dp host only
1636          * step-2: enable hdp block and have hpd irq enabled here
1637          * step-3: waiting for plugin irq while phy is not initialized
1638          * step-4: DP PHY is initialized at plugin handler before link training
1639          *
1640          */
1641         mutex_lock(&dp->event_mutex);
1642         if (pm_runtime_resume_and_get(&dp_display->pdev->dev)) {
1643                 DRM_ERROR("failed to resume power\n");
1644                 mutex_unlock(&dp->event_mutex);
1645                 return;
1646         }
1647
1648         dp_catalog_ctrl_hpd_enable(dp->catalog);
1649
1650         /* enable HDP interrupts */
1651         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true);
1652
1653         dp_display->internal_hpd = true;
1654         mutex_unlock(&dp->event_mutex);
1655 }
1656
1657 void dp_bridge_hpd_disable(struct drm_bridge *bridge)
1658 {
1659         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1660         struct msm_dp *dp_display = dp_bridge->dp_display;
1661         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1662
1663         mutex_lock(&dp->event_mutex);
1664         /* disable HDP interrupts */
1665         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
1666         dp_catalog_ctrl_hpd_disable(dp->catalog);
1667
1668         dp_display->internal_hpd = false;
1669
1670         pm_runtime_put_sync(&dp_display->pdev->dev);
1671         mutex_unlock(&dp->event_mutex);
1672 }
1673
1674 void dp_bridge_hpd_notify(struct drm_bridge *bridge,
1675                           enum drm_connector_status status)
1676 {
1677         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1678         struct msm_dp *dp_display = dp_bridge->dp_display;
1679         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1680
1681         /* Without next_bridge interrupts are handled by the DP core directly */
1682         if (dp_display->internal_hpd)
1683                 return;
1684
1685         if (!dp_display->link_ready && status == connector_status_connected)
1686                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1687         else if (dp_display->link_ready && status == connector_status_disconnected)
1688                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1689 }