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_ststus_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_ststus_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         } else {
 592                 dp->hpd_state = ST_MAINLINK_READY;
 593         }
 594
 595         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 596                         dp->dp_display.connector_type, state);
 597         mutex_unlock(&dp->event_mutex);
 598
 599         /* uevent will complete connection part */
 600         return 0;
 601 };
 602
 603 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 604                 bool plugged)
 605 {
 606         struct dp_display_private *dp;
 607
 608         dp = container_of(dp_display,
 609                         struct dp_display_private, dp_display);
 610
 611         /* notify audio subsystem only if sink supports audio */
 612         if (dp_display->plugged_cb && dp_display->codec_dev &&
 613                         dp->audio_supported)
 614                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 615 }
 616
 617 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 618 {
 619         u32 state;
 620         struct platform_device *pdev = dp->dp_display.pdev;
 621
 622         mutex_lock(&dp->event_mutex);
 623
 624         state = dp->hpd_state;
 625
 626         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 627                         dp->dp_display.connector_type, state);
 628
 629         /* unplugged, no more irq_hpd handle */
 630         dp_del_event(dp, EV_IRQ_HPD_INT);
 631
 632         if (state == ST_DISCONNECTED) {
 633                 /* triggered by irq_hdp with sink_count = 0 */
 634                 if (dp->link->sink_count == 0) {
 635                         dp_display_host_phy_exit(dp);
 636                 }
 637                 dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 638                 mutex_unlock(&dp->event_mutex);
 639                 return 0;
 640         } else if (state == ST_DISCONNECT_PENDING) {
 641                 mutex_unlock(&dp->event_mutex);
 642                 return 0;
 643         } else if (state == ST_MAINLINK_READY) {
 644                 dp_ctrl_off_link(dp->ctrl);
 645                 dp_display_host_phy_exit(dp);
 646                 dp->hpd_state = ST_DISCONNECTED;
 647                 dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 648                 mutex_unlock(&dp->event_mutex);
 649                 return 0;
 650         }
 651
 652         /*
 653          * We don't need separate work for disconnect as
 654          * connect/attention interrupts are disabled
 655          */
 656         dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
 657
 658         if (state == ST_DISPLAY_OFF) {
 659                 dp->hpd_state = ST_DISCONNECTED;
 660         } else {
 661                 dp->hpd_state = ST_DISCONNECT_PENDING;
 662         }
 663
 664         /* signal the disconnect event early to ensure proper teardown */
 665         dp_display_handle_plugged_change(&dp->dp_display, false);
 666
 667         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 668                         dp->dp_display.connector_type, state);
 669
 670         /* uevent will complete disconnection part */
 671         pm_runtime_put_sync(&pdev->dev);
 672         mutex_unlock(&dp->event_mutex);
 673         return 0;
 674 }
 675
 676 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 677 {
 678         u32 state;
 679
 680         mutex_lock(&dp->event_mutex);
 681
 682         /* irq_hpd can happen at either connected or disconnected state */
 683         state =  dp->hpd_state;
 684         drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
 685                         dp->dp_display.connector_type, state);
 686
 687         if (state == ST_DISPLAY_OFF) {
 688                 mutex_unlock(&dp->event_mutex);
 689                 return 0;
 690         }
 691
 692         if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
 693                 /* wait until ST_CONNECTED */
 694                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 695                 mutex_unlock(&dp->event_mutex);
 696                 return 0;
 697         }
 698
 699         dp_display_usbpd_attention_cb(&dp->dp_display.pdev->dev);
 700
 701         drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
 702                         dp->dp_display.connector_type, state);
 703
 704         mutex_unlock(&dp->event_mutex);
 705
 706         return 0;
 707 }
 708
 709 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 710 {
 711         dp_audio_put(dp->audio);
 712         dp_panel_put(dp->panel);
 713         dp_aux_put(dp->aux);
 714 }
 715
 716 static int dp_init_sub_modules(struct dp_display_private *dp)
 717 {
 718         int rc = 0;
 719         struct device *dev = &dp->dp_display.pdev->dev;
 720         struct dp_panel_in panel_in = {
 721                 .dev = dev,
 722         };
 723         struct phy *phy;
 724
 725         phy = devm_phy_get(dev, "dp");
 726         if (IS_ERR(phy))
 727                 return PTR_ERR(phy);
 728
 729         dp->catalog = dp_catalog_get(dev);
 730         if (IS_ERR(dp->catalog)) {
 731                 rc = PTR_ERR(dp->catalog);
 732                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 733                 dp->catalog = NULL;
 734                 goto error;
 735         }
 736
 737         dp->aux = dp_aux_get(dev, dp->catalog,
 738                              phy,
 739                              dp->dp_display.is_edp);
 740         if (IS_ERR(dp->aux)) {
 741                 rc = PTR_ERR(dp->aux);
 742                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 743                 dp->aux = NULL;
 744                 goto error;
 745         }
 746
 747         dp->link = dp_link_get(dev, dp->aux);
 748         if (IS_ERR(dp->link)) {
 749                 rc = PTR_ERR(dp->link);
 750                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 751                 dp->link = NULL;
 752                 goto error_link;
 753         }
 754
 755         panel_in.aux = dp->aux;
 756         panel_in.catalog = dp->catalog;
 757         panel_in.link = dp->link;
 758
 759         dp->panel = dp_panel_get(&panel_in);
 760         if (IS_ERR(dp->panel)) {
 761                 rc = PTR_ERR(dp->panel);
 762                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 763                 dp->panel = NULL;
 764                 goto error_link;
 765         }
 766
 767         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 768                                dp->catalog,
 769                                phy);
 770         if (IS_ERR(dp->ctrl)) {
 771                 rc = PTR_ERR(dp->ctrl);
 772                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 773                 dp->ctrl = NULL;
 774                 goto error_ctrl;
 775         }
 776
 777         dp->audio = dp_audio_get(dp->dp_display.pdev, dp->panel, dp->catalog);
 778         if (IS_ERR(dp->audio)) {
 779                 rc = PTR_ERR(dp->audio);
 780                 pr_err("failed to initialize audio, rc = %d\n", rc);
 781                 dp->audio = NULL;
 782                 goto error_ctrl;
 783         }
 784
 785         return rc;
 786
 787 error_ctrl:
 788         dp_panel_put(dp->panel);
 789 error_link:
 790         dp_aux_put(dp->aux);
 791 error:
 792         return rc;
 793 }
 794
 795 static int dp_display_set_mode(struct msm_dp *dp_display,
 796                                struct dp_display_mode *mode)
 797 {
 798         struct dp_display_private *dp;
 799
 800         dp = container_of(dp_display, struct dp_display_private, dp_display);
 801
 802         drm_mode_copy(&dp->panel->dp_mode.drm_mode, &mode->drm_mode);
 803         dp->panel->dp_mode.bpp = mode->bpp;
 804         dp->panel->dp_mode.capabilities = mode->capabilities;
 805         dp->panel->dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420;
 806         dp_panel_init_panel_info(dp->panel);
 807         return 0;
 808 }
 809
 810 static int dp_display_enable(struct dp_display_private *dp, bool force_link_train)
 811 {
 812         int rc = 0;
 813         struct msm_dp *dp_display = &dp->dp_display;
 814
 815         drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
 816         if (dp_display->power_on) {
 817                 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
 818                 return 0;
 819         }
 820
 821         rc = dp_ctrl_on_stream(dp->ctrl, force_link_train);
 822         if (!rc)
 823                 dp_display->power_on = true;
 824
 825         return rc;
 826 }
 827
 828 static int dp_display_post_enable(struct msm_dp *dp_display)
 829 {
 830         struct dp_display_private *dp;
 831         u32 rate;
 832
 833         dp = container_of(dp_display, struct dp_display_private, dp_display);
 834
 835         rate = dp->link->link_params.rate;
 836
 837         if (dp->audio_supported) {
 838                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 839                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 840         }
 841
 842         /* signal the connect event late to synchronize video and display */
 843         dp_display_handle_plugged_change(dp_display, true);
 844
 845         if (dp_display->psr_supported)
 846                 dp_ctrl_config_psr(dp->ctrl);
 847
 848         return 0;
 849 }
 850
 851 static int dp_display_disable(struct dp_display_private *dp)
 852 {
 853         struct msm_dp *dp_display = &dp->dp_display;
 854
 855         if (!dp_display->power_on)
 856                 return 0;
 857
 858         /* wait only if audio was enabled */
 859         if (dp_display->audio_enabled) {
 860                 /* signal the disconnect event */
 861                 dp_display_handle_plugged_change(dp_display, false);
 862                 if (!wait_for_completion_timeout(&dp->audio_comp,
 863                                 HZ * 5))
 864                         DRM_ERROR("audio comp timeout\n");
 865         }
 866
 867         dp_display->audio_enabled = false;
 868
 869         if (dp->link->sink_count == 0) {
 870                 /*
 871                  * irq_hpd with sink_count = 0
 872                  * hdmi unplugged out of dongle
 873                  */
 874                 dp_ctrl_off_link_stream(dp->ctrl);
 875         } else {
 876                 /*
 877                  * unplugged interrupt
 878                  * dongle unplugged out of DUT
 879                  */
 880                 dp_ctrl_off(dp->ctrl);
 881                 dp_display_host_phy_exit(dp);
 882         }
 883
 884         dp_display->power_on = false;
 885
 886         drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
 887         return 0;
 888 }
 889
 890 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 891                 hdmi_codec_plugged_cb fn, struct device *codec_dev)
 892 {
 893         bool plugged;
 894
 895         dp_display->plugged_cb = fn;
 896         dp_display->codec_dev = codec_dev;
 897         plugged = dp_display->link_ready;
 898         dp_display_handle_plugged_change(dp_display, plugged);
 899
 900         return 0;
 901 }
 902
 903 /**
 904  * dp_bridge_mode_valid - callback to determine if specified mode is valid
 905  * @bridge: Pointer to drm bridge structure
 906  * @info: display info
 907  * @mode: Pointer to drm mode structure
 908  * Returns: Validity status for specified mode
 909  */
 910 enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
 911                                           const struct drm_display_info *info,
 912                                           const struct drm_display_mode *mode)
 913 {
 914         const u32 num_components = 3, default_bpp = 24;
 915         struct dp_display_private *dp_display;
 916         struct dp_link_info *link_info;
 917         u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
 918         struct msm_dp *dp;
 919         int mode_pclk_khz = mode->clock;
 920
 921         dp = to_dp_bridge(bridge)->dp_display;
 922
 923         if (!dp || !mode_pclk_khz || !dp->connector) {
 924                 DRM_ERROR("invalid params\n");
 925                 return -EINVAL;
 926         }
 927
 928         if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)
 929                 return MODE_CLOCK_HIGH;
 930
 931         dp_display = container_of(dp, struct dp_display_private, dp_display);
 932         link_info = &dp_display->panel->link_info;
 933
 934         if (drm_mode_is_420_only(&dp->connector->display_info, mode) &&
 935             dp_display->panel->vsc_sdp_supported)
 936                 mode_pclk_khz /= 2;
 937
 938         mode_bpp = dp->connector->display_info.bpc * num_components;
 939         if (!mode_bpp)
 940                 mode_bpp = default_bpp;
 941
 942         mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
 943                         mode_bpp, mode_pclk_khz);
 944
 945         mode_rate_khz = mode_pclk_khz * mode_bpp;
 946         supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
 947
 948         if (mode_rate_khz > supported_rate_khz)
 949                 return MODE_BAD;
 950
 951         return MODE_OK;
 952 }
 953
 954 int dp_display_get_modes(struct msm_dp *dp)
 955 {
 956         struct dp_display_private *dp_display;
 957
 958         if (!dp) {
 959                 DRM_ERROR("invalid params\n");
 960                 return 0;
 961         }
 962
 963         dp_display = container_of(dp, struct dp_display_private, dp_display);
 964
 965         return dp_panel_get_modes(dp_display->panel,
 966                 dp->connector);
 967 }
 968
 969 bool dp_display_check_video_test(struct msm_dp *dp)
 970 {
 971         struct dp_display_private *dp_display;
 972
 973         dp_display = container_of(dp, struct dp_display_private, dp_display);
 974
 975         return dp_display->panel->video_test;
 976 }
 977
 978 int dp_display_get_test_bpp(struct msm_dp *dp)
 979 {
 980         struct dp_display_private *dp_display;
 981
 982         if (!dp) {
 983                 DRM_ERROR("invalid params\n");
 984                 return 0;
 985         }
 986
 987         dp_display = container_of(dp, struct dp_display_private, dp_display);
 988
 989         return dp_link_bit_depth_to_bpp(
 990                 dp_display->link->test_video.test_bit_depth);
 991 }
 992
 993 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
 994 {
 995         struct dp_display_private *dp_display;
 996
 997         dp_display = container_of(dp, struct dp_display_private, dp_display);
 998
 999         /*
1000          * if we are reading registers we need the link clocks to be on
1001          * however till DP cable is connected this will not happen as we
1002          * do not know the resolution to power up with. Hence check the
1003          * power_on status before dumping DP registers to avoid crash due
1004          * to unclocked access
1005          */
1006         mutex_lock(&dp_display->event_mutex);
1007
1008         if (!dp->power_on) {
1009                 mutex_unlock(&dp_display->event_mutex);
1010                 return;
1011         }
1012
1013         dp_catalog_snapshot(dp_display->catalog, disp_state);
1014
1015         mutex_unlock(&dp_display->event_mutex);
1016 }
1017
1018 void dp_display_set_psr(struct msm_dp *dp_display, bool enter)
1019 {
1020         struct dp_display_private *dp;
1021
1022         if (!dp_display) {
1023                 DRM_ERROR("invalid params\n");
1024                 return;
1025         }
1026
1027         dp = container_of(dp_display, struct dp_display_private, dp_display);
1028         dp_ctrl_set_psr(dp->ctrl, enter);
1029 }
1030
1031 static int hpd_event_thread(void *data)
1032 {
1033         struct dp_display_private *dp_priv;
1034         unsigned long flag;
1035         struct dp_event *todo;
1036         int timeout_mode = 0;
1037
1038         dp_priv = (struct dp_display_private *)data;
1039
1040         while (1) {
1041                 if (timeout_mode) {
1042                         wait_event_timeout(dp_priv->event_q,
1043                                 (dp_priv->event_pndx == dp_priv->event_gndx) ||
1044                                         kthread_should_stop(), EVENT_TIMEOUT);
1045                 } else {
1046                         wait_event_interruptible(dp_priv->event_q,
1047                                 (dp_priv->event_pndx != dp_priv->event_gndx) ||
1048                                         kthread_should_stop());
1049                 }
1050
1051                 if (kthread_should_stop())
1052                         break;
1053
1054                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1055                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1056                 if (todo->delay) {
1057                         struct dp_event *todo_next;
1058
1059                         dp_priv->event_gndx++;
1060                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1061
1062                         /* re enter delay event into q */
1063                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1064                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1065                         todo_next->event_id = todo->event_id;
1066                         todo_next->data = todo->data;
1067                         todo_next->delay = todo->delay - 1;
1068
1069                         /* clean up older event */
1070                         todo->event_id = EV_NO_EVENT;
1071                         todo->delay = 0;
1072
1073                         /* switch to timeout mode */
1074                         timeout_mode = 1;
1075                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1076                         continue;
1077                 }
1078
1079                 /* timeout with no events in q */
1080                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1081                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1082                         continue;
1083                 }
1084
1085                 dp_priv->event_gndx++;
1086                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1087                 timeout_mode = 0;
1088                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1089
1090                 switch (todo->event_id) {
1091                 case EV_HPD_PLUG_INT:
1092                         dp_hpd_plug_handle(dp_priv, todo->data);
1093                         break;
1094                 case EV_HPD_UNPLUG_INT:
1095                         dp_hpd_unplug_handle(dp_priv, todo->data);
1096                         break;
1097                 case EV_IRQ_HPD_INT:
1098                         dp_irq_hpd_handle(dp_priv, todo->data);
1099                         break;
1100                 case EV_USER_NOTIFICATION:
1101                         dp_display_send_hpd_notification(dp_priv,
1102                                                 todo->data);
1103                         break;
1104                 default:
1105                         break;
1106                 }
1107         }
1108
1109         return 0;
1110 }
1111
1112 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv)
1113 {
1114         /* set event q to empty */
1115         dp_priv->event_gndx = 0;
1116         dp_priv->event_pndx = 0;
1117
1118         dp_priv->ev_tsk = kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1119         if (IS_ERR(dp_priv->ev_tsk))
1120                 return PTR_ERR(dp_priv->ev_tsk);
1121
1122         return 0;
1123 }
1124
1125 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1126 {
1127         struct dp_display_private *dp = dev_id;
1128         irqreturn_t ret = IRQ_NONE;
1129         u32 hpd_isr_status;
1130
1131         if (!dp) {
1132                 DRM_ERROR("invalid data\n");
1133                 return IRQ_NONE;
1134         }
1135
1136         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1137
1138         if (hpd_isr_status & 0x0F) {
1139                 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
1140                         dp->dp_display.connector_type, hpd_isr_status);
1141                 /* hpd related interrupts */
1142                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1143                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1144
1145                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1146                         dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1147                 }
1148
1149                 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1150                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1151                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1152                 }
1153
1154                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1155                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1156
1157                 ret = IRQ_HANDLED;
1158         }
1159
1160         /* DP controller isr */
1161         ret |= dp_ctrl_isr(dp->ctrl);
1162
1163         /* DP aux isr */
1164         ret |= dp_aux_isr(dp->aux);
1165
1166         return ret;
1167 }
1168
1169 static int dp_display_request_irq(struct dp_display_private *dp)
1170 {
1171         int rc = 0;
1172         struct platform_device *pdev = dp->dp_display.pdev;
1173
1174         dp->irq = platform_get_irq(pdev, 0);
1175         if (dp->irq < 0) {
1176                 DRM_ERROR("failed to get irq\n");
1177                 return dp->irq;
1178         }
1179
1180         rc = devm_request_irq(&pdev->dev, dp->irq, dp_display_irq_handler,
1181                               IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN,
1182                               "dp_display_isr", dp);
1183
1184         if (rc < 0) {
1185                 DRM_ERROR("failed to request IRQ%u: %d\n",
1186                                 dp->irq, rc);
1187                 return rc;
1188         }
1189
1190         return 0;
1191 }
1192
1193 static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
1194 {
1195         const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
1196         struct resource *res;
1197         int i;
1198
1199         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1200         if (!res)
1201                 return NULL;
1202
1203         for (i = 0; i < descs[i].io_start; i++) {
1204                 if (descs[i].io_start == res->start)
1205                         return &descs[i];
1206         }
1207
1208         dev_err(&pdev->dev, "unknown displayport instance\n");
1209         return NULL;
1210 }
1211
1212 static int dp_display_probe_tail(struct device *dev)
1213 {
1214         struct msm_dp *dp = dev_get_drvdata(dev);
1215         int ret;
1216
1217         /*
1218          * External bridges are mandatory for eDP interfaces: one has to
1219          * provide at least an eDP panel (which gets wrapped into panel-bridge).
1220          *
1221          * For DisplayPort interfaces external bridges are optional, so
1222          * silently ignore an error if one is not present (-ENODEV).
1223          */
1224         dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
1225         if (IS_ERR(dp->next_bridge)) {
1226                 ret = PTR_ERR(dp->next_bridge);
1227                 dp->next_bridge = NULL;
1228                 if (dp->is_edp || ret != -ENODEV)
1229                         return ret;
1230         }
1231
1232         ret = component_add(dev, &dp_display_comp_ops);
1233         if (ret)
1234                 DRM_ERROR("component add failed, rc=%d\n", ret);
1235
1236         return ret;
1237 }
1238
1239 static int dp_auxbus_done_probe(struct drm_dp_aux *aux)
1240 {
1241         return dp_display_probe_tail(aux->dev);
1242 }
1243
1244 static int dp_display_probe(struct platform_device *pdev)
1245 {
1246         int rc = 0;
1247         struct dp_display_private *dp;
1248         const struct msm_dp_desc *desc;
1249
1250         if (!pdev || !pdev->dev.of_node) {
1251                 DRM_ERROR("pdev not found\n");
1252                 return -ENODEV;
1253         }
1254
1255         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1256         if (!dp)
1257                 return -ENOMEM;
1258
1259         desc = dp_display_get_desc(pdev);
1260         if (!desc)
1261                 return -EINVAL;
1262
1263         dp->dp_display.pdev = pdev;
1264         dp->name = "drm_dp";
1265         dp->id = desc->id;
1266         dp->dp_display.connector_type = desc->connector_type;
1267         dp->wide_bus_supported = desc->wide_bus_supported;
1268         dp->dp_display.is_edp =
1269                 (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
1270
1271         rc = dp_init_sub_modules(dp);
1272         if (rc) {
1273                 DRM_ERROR("init sub module failed\n");
1274                 return -EPROBE_DEFER;
1275         }
1276
1277         /* setup event q */
1278         mutex_init(&dp->event_mutex);
1279         init_waitqueue_head(&dp->event_q);
1280         spin_lock_init(&dp->event_lock);
1281
1282         /* Store DP audio handle inside DP display */
1283         dp->dp_display.dp_audio = dp->audio;
1284
1285         init_completion(&dp->audio_comp);
1286
1287         platform_set_drvdata(pdev, &dp->dp_display);
1288
1289         rc = devm_pm_runtime_enable(&pdev->dev);
1290         if (rc)
1291                 goto err;
1292
1293         rc = dp_display_request_irq(dp);
1294         if (rc)
1295                 goto err;
1296
1297         if (dp->dp_display.is_edp) {
1298                 rc = devm_of_dp_aux_populate_bus(dp->aux, dp_auxbus_done_probe);
1299                 if (rc) {
1300                         DRM_ERROR("eDP auxbus population failed, rc=%d\n", rc);
1301                         goto err;
1302                 }
1303         } else {
1304                 rc = dp_display_probe_tail(&pdev->dev);
1305                 if (rc)
1306                         goto err;
1307         }
1308
1309         return rc;
1310
1311 err:
1312         dp_display_deinit_sub_modules(dp);
1313         return rc;
1314 }
1315
1316 static void dp_display_remove(struct platform_device *pdev)
1317 {
1318         struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
1319
1320         component_del(&pdev->dev, &dp_display_comp_ops);
1321         dp_display_deinit_sub_modules(dp);
1322         platform_set_drvdata(pdev, NULL);
1323 }
1324
1325 static int dp_pm_runtime_suspend(struct device *dev)
1326 {
1327         struct dp_display_private *dp = dev_get_dp_display_private(dev);
1328
1329         disable_irq(dp->irq);
1330
1331         if (dp->dp_display.is_edp) {
1332                 dp_display_host_phy_exit(dp);
1333                 dp_catalog_ctrl_hpd_disable(dp->catalog);
1334         }
1335         dp_display_host_deinit(dp);
1336
1337         return 0;
1338 }
1339
1340 static int dp_pm_runtime_resume(struct device *dev)
1341 {
1342         struct dp_display_private *dp = dev_get_dp_display_private(dev);
1343
1344         /*
1345          * for eDP, host cotroller, HPD block and PHY are enabled here
1346          * but with HPD irq disabled
1347          *
1348          * for DP, only host controller is enabled here.
1349          * HPD block is enabled at dp_bridge_hpd_enable()
1350          * PHY will be enabled at plugin handler later
1351          */
1352         dp_display_host_init(dp);
1353         if (dp->dp_display.is_edp) {
1354                 dp_catalog_ctrl_hpd_enable(dp->catalog);
1355                 dp_display_host_phy_init(dp);
1356         }
1357
1358         enable_irq(dp->irq);
1359         return 0;
1360 }
1361
1362 static const struct dev_pm_ops dp_pm_ops = {
1363         SET_RUNTIME_PM_OPS(dp_pm_runtime_suspend, dp_pm_runtime_resume, NULL)
1364         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1365                                 pm_runtime_force_resume)
1366 };
1367
1368 static struct platform_driver dp_display_driver = {
1369         .probe  = dp_display_probe,
1370         .remove_new = dp_display_remove,
1371         .driver = {
1372                 .name = "msm-dp-display",
1373                 .of_match_table = dp_dt_match,
1374                 .suppress_bind_attrs = true,
1375                 .pm = &dp_pm_ops,
1376         },
1377 };
1378
1379 int __init msm_dp_register(void)
1380 {
1381         int ret;
1382
1383         ret = platform_driver_register(&dp_display_driver);
1384         if (ret)
1385                 DRM_ERROR("Dp display driver register failed");
1386
1387         return ret;
1388 }
1389
1390 void __exit msm_dp_unregister(void)
1391 {
1392         platform_driver_unregister(&dp_display_driver);
1393 }
1394
1395 bool msm_dp_is_yuv_420_enabled(const struct msm_dp *dp_display,
1396                                const struct drm_display_mode *mode)
1397 {
1398         struct dp_display_private *dp;
1399         const struct drm_display_info *info;
1400
1401         dp = container_of(dp_display, struct dp_display_private, dp_display);
1402         info = &dp_display->connector->display_info;
1403
1404         return dp->panel->vsc_sdp_supported && drm_mode_is_420_only(info, mode);
1405 }
1406
1407 bool msm_dp_needs_periph_flush(const struct msm_dp *dp_display,
1408                                const struct drm_display_mode *mode)
1409 {
1410         return msm_dp_is_yuv_420_enabled(dp_display, mode);
1411 }
1412
1413 bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
1414 {
1415         struct dp_display_private *dp;
1416
1417         dp = container_of(dp_display, struct dp_display_private, dp_display);
1418
1419         if (dp->dp_mode.out_fmt_is_yuv_420)
1420                 return false;
1421
1422         return dp->wide_bus_supported;
1423 }
1424
1425 void dp_display_debugfs_init(struct msm_dp *dp_display, struct dentry *root, bool is_edp)
1426 {
1427         struct dp_display_private *dp;
1428         struct device *dev;
1429         int rc;
1430
1431         dp = container_of(dp_display, struct dp_display_private, dp_display);
1432         dev = &dp->dp_display.pdev->dev;
1433
1434         dp->debug = dp_debug_get(dev, dp->panel,
1435                                         dp->link, dp->dp_display.connector,
1436                                         root, is_edp);
1437         if (IS_ERR(dp->debug)) {
1438                 rc = PTR_ERR(dp->debug);
1439                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1440                 dp->debug = NULL;
1441         }
1442 }
1443
1444 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1445                         struct drm_encoder *encoder, bool yuv_supported)
1446 {
1447         struct dp_display_private *dp_priv;
1448         int ret;
1449
1450         dp_display->drm_dev = dev;
1451
1452         dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
1453
1454         ret = dp_bridge_init(dp_display, dev, encoder);
1455         if (ret) {
1456                 DRM_DEV_ERROR(dev->dev,
1457                         "failed to create dp bridge: %d\n", ret);
1458                 return ret;
1459         }
1460
1461         dp_display->connector = dp_drm_connector_init(dp_display, encoder, yuv_supported);
1462         if (IS_ERR(dp_display->connector)) {
1463                 ret = PTR_ERR(dp_display->connector);
1464                 DRM_DEV_ERROR(dev->dev,
1465                         "failed to create dp connector: %d\n", ret);
1466                 dp_display->connector = NULL;
1467                 return ret;
1468         }
1469
1470         dp_priv->panel->connector = dp_display->connector;
1471
1472         return 0;
1473 }
1474
1475 void dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
1476                              struct drm_bridge_state *old_bridge_state)
1477 {
1478         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1479         struct msm_dp *dp = dp_bridge->dp_display;
1480         int rc = 0;
1481         struct dp_display_private *dp_display;
1482         u32 state;
1483         bool force_link_train = false;
1484
1485         dp_display = container_of(dp, struct dp_display_private, dp_display);
1486         if (!dp_display->dp_mode.drm_mode.clock) {
1487                 DRM_ERROR("invalid params\n");
1488                 return;
1489         }
1490
1491         if (dp->is_edp)
1492                 dp_hpd_plug_handle(dp_display, 0);
1493
1494         mutex_lock(&dp_display->event_mutex);
1495         if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
1496                 DRM_ERROR("failed to pm_runtime_resume\n");
1497                 mutex_unlock(&dp_display->event_mutex);
1498                 return;
1499         }
1500
1501         state = dp_display->hpd_state;
1502         if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
1503                 mutex_unlock(&dp_display->event_mutex);
1504                 return;
1505         }
1506
1507         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1508         if (rc) {
1509                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1510                 mutex_unlock(&dp_display->event_mutex);
1511                 return;
1512         }
1513
1514         state =  dp_display->hpd_state;
1515
1516         if (state == ST_DISPLAY_OFF) {
1517                 dp_display_host_phy_init(dp_display);
1518                 force_link_train = true;
1519         }
1520
1521         dp_display_enable(dp_display, force_link_train);
1522
1523         rc = dp_display_post_enable(dp);
1524         if (rc) {
1525                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1526                 dp_display_disable(dp_display);
1527         }
1528
1529         /* completed connection */
1530         dp_display->hpd_state = ST_CONNECTED;
1531
1532         drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1533         mutex_unlock(&dp_display->event_mutex);
1534 }
1535
1536 void dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
1537                               struct drm_bridge_state *old_bridge_state)
1538 {
1539         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1540         struct msm_dp *dp = dp_bridge->dp_display;
1541         struct dp_display_private *dp_display;
1542
1543         dp_display = container_of(dp, struct dp_display_private, dp_display);
1544
1545         dp_ctrl_push_idle(dp_display->ctrl);
1546 }
1547
1548 void dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
1549                                    struct drm_bridge_state *old_bridge_state)
1550 {
1551         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1552         struct msm_dp *dp = dp_bridge->dp_display;
1553         u32 state;
1554         struct dp_display_private *dp_display;
1555
1556         dp_display = container_of(dp, struct dp_display_private, dp_display);
1557
1558         if (dp->is_edp)
1559                 dp_hpd_unplug_handle(dp_display, 0);
1560
1561         mutex_lock(&dp_display->event_mutex);
1562
1563         state = dp_display->hpd_state;
1564         if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED)
1565                 drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
1566                            dp->connector_type, state);
1567
1568         dp_display_disable(dp_display);
1569
1570         state =  dp_display->hpd_state;
1571         if (state == ST_DISCONNECT_PENDING) {
1572                 /* completed disconnection */
1573                 dp_display->hpd_state = ST_DISCONNECTED;
1574         } else {
1575                 dp_display->hpd_state = ST_DISPLAY_OFF;
1576         }
1577
1578         drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
1579
1580         pm_runtime_put_sync(&dp->pdev->dev);
1581         mutex_unlock(&dp_display->event_mutex);
1582 }
1583
1584 void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
1585                         const struct drm_display_mode *mode,
1586                         const struct drm_display_mode *adjusted_mode)
1587 {
1588         struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
1589         struct msm_dp *dp = dp_bridge->dp_display;
1590         struct dp_display_private *dp_display;
1591         struct dp_panel *dp_panel;
1592
1593         dp_display = container_of(dp, struct dp_display_private, dp_display);
1594         dp_panel = dp_display->panel;
1595
1596         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1597
1598         if (dp_display_check_video_test(dp))
1599                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1600         else /* Default num_components per pixel = 3 */
1601                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1602
1603         if (!dp_display->dp_mode.bpp)
1604                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1605
1606         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1607
1608         dp_display->dp_mode.v_active_low =
1609                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1610
1611         dp_display->dp_mode.h_active_low =
1612                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1613
1614         dp_display->dp_mode.out_fmt_is_yuv_420 =
1615                 drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) &&
1616                 dp_panel->vsc_sdp_supported;
1617
1618         /* populate wide_bus_support to different layers */
1619         dp_display->ctrl->wide_bus_en =
1620                 dp_display->dp_mode.out_fmt_is_yuv_420 ? false : dp_display->wide_bus_supported;
1621         dp_display->catalog->wide_bus_en =
1622                 dp_display->dp_mode.out_fmt_is_yuv_420 ? false : dp_display->wide_bus_supported;
1623 }
1624
1625 void dp_bridge_hpd_enable(struct drm_bridge *bridge)
1626 {
1627         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1628         struct msm_dp *dp_display = dp_bridge->dp_display;
1629         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1630
1631         /*
1632          * this is for external DP with hpd irq enabled case,
1633          * step-1: dp_pm_runtime_resume() enable dp host only
1634          * step-2: enable hdp block and have hpd irq enabled here
1635          * step-3: waiting for plugin irq while phy is not initialized
1636          * step-4: DP PHY is initialized at plugin handler before link training
1637          *
1638          */
1639         mutex_lock(&dp->event_mutex);
1640         if (pm_runtime_resume_and_get(&dp_display->pdev->dev)) {
1641                 DRM_ERROR("failed to resume power\n");
1642                 mutex_unlock(&dp->event_mutex);
1643                 return;
1644         }
1645
1646         dp_catalog_ctrl_hpd_enable(dp->catalog);
1647
1648         /* enable HDP interrupts */
1649         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true);
1650
1651         dp_display->internal_hpd = true;
1652         mutex_unlock(&dp->event_mutex);
1653 }
1654
1655 void dp_bridge_hpd_disable(struct drm_bridge *bridge)
1656 {
1657         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1658         struct msm_dp *dp_display = dp_bridge->dp_display;
1659         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1660
1661         mutex_lock(&dp->event_mutex);
1662         /* disable HDP interrupts */
1663         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
1664         dp_catalog_ctrl_hpd_disable(dp->catalog);
1665
1666         dp_display->internal_hpd = false;
1667
1668         pm_runtime_put_sync(&dp_display->pdev->dev);
1669         mutex_unlock(&dp->event_mutex);
1670 }
1671
1672 void dp_bridge_hpd_notify(struct drm_bridge *bridge,
1673                           enum drm_connector_status status)
1674 {
1675         struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
1676         struct msm_dp *dp_display = dp_bridge->dp_display;
1677         struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
1678
1679         /* Without next_bridge interrupts are handled by the DP core directly */
1680         if (dp_display->internal_hpd)
1681                 return;
1682
1683         if (!dp_display->link_ready && status == connector_status_connected)
1684                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1685         else if (dp_display->link_ready && status == connector_status_disconnected)
1686                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1687 }