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/delay.h>
  13
  14 #include "msm_drv.h"
  15 #include "msm_kms.h"
  16 #include "dp_hpd.h"
  17 #include "dp_parser.h"
  18 #include "dp_power.h"
  19 #include "dp_catalog.h"
  20 #include "dp_aux.h"
  21 #include "dp_reg.h"
  22 #include "dp_link.h"
  23 #include "dp_panel.h"
  24 #include "dp_ctrl.h"
  25 #include "dp_display.h"
  26 #include "dp_drm.h"
  27 #include "dp_audio.h"
  28 #include "dp_debug.h"
  29
  30 static struct msm_dp *g_dp_display;
  31 #define HPD_STRING_SIZE 30
  32
  33 enum {
  34         ISR_DISCONNECTED,
  35         ISR_CONNECT_PENDING,
  36         ISR_CONNECTED,
  37         ISR_HPD_REPLUG_COUNT,
  38         ISR_IRQ_HPD_PULSE_COUNT,
  39         ISR_HPD_LO_GLITH_COUNT,
  40 };
  41
  42 /* event thread connection state */
  43 enum {
  44         ST_DISCONNECTED,
  45         ST_CONNECT_PENDING,
  46         ST_CONNECTED,
  47         ST_DISCONNECT_PENDING,
  48         ST_DISPLAY_OFF,
  49         ST_SUSPENDED,
  50 };
  51
  52 enum {
  53         EV_NO_EVENT,
  54         /* hpd events */
  55         EV_HPD_INIT_SETUP,
  56         EV_HPD_PLUG_INT,
  57         EV_IRQ_HPD_INT,
  58         EV_HPD_REPLUG_INT,
  59         EV_HPD_UNPLUG_INT,
  60         EV_USER_NOTIFICATION,
  61         EV_CONNECT_PENDING_TIMEOUT,
  62         EV_DISCONNECT_PENDING_TIMEOUT,
  63 };
  64
  65 #define EVENT_TIMEOUT   (HZ/10) /* 100ms */
  66 #define DP_EVENT_Q_MAX  8
  67
  68 #define DP_TIMEOUT_5_SECOND     (5000/EVENT_TIMEOUT)
  69 #define DP_TIMEOUT_NONE         0
  70
  71 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
  72
  73 struct dp_event {
  74         u32 event_id;
  75         u32 data;
  76         u32 delay;
  77 };
  78
  79 struct dp_display_private {
  80         char *name;
  81         int irq;
  82
  83         /* state variables */
  84         bool core_initialized;
  85         bool hpd_irq_on;
  86         bool audio_supported;
  87
  88         struct platform_device *pdev;
  89         struct dentry *root;
  90
  91         struct dp_usbpd   *usbpd;
  92         struct dp_parser  *parser;
  93         struct dp_power   *power;
  94         struct dp_catalog *catalog;
  95         struct drm_dp_aux *aux;
  96         struct dp_link    *link;
  97         struct dp_panel   *panel;
  98         struct dp_ctrl    *ctrl;
  99         struct dp_debug   *debug;
 100
 101         struct dp_usbpd_cb usbpd_cb;
 102         struct dp_display_mode dp_mode;
 103         struct msm_dp dp_display;
 104
 105         bool encoder_mode_set;
 106
 107         /* wait for audio signaling */
 108         struct completion audio_comp;
 109
 110         /* event related only access by event thread */
 111         struct mutex event_mutex;
 112         wait_queue_head_t event_q;
 113         u32 hpd_state;
 114         u32 event_pndx;
 115         u32 event_gndx;
 116         struct dp_event event_list[DP_EVENT_Q_MAX];
 117         spinlock_t event_lock;
 118
 119         struct dp_audio *audio;
 120 };
 121
 122 static const struct of_device_id dp_dt_match[] = {
 123         {.compatible = "qcom,sc7180-dp"},
 124         {}
 125 };
 126
 127 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
 128                                                 u32 data, u32 delay)
 129 {
 130         unsigned long flag;
 131         struct dp_event *todo;
 132         int pndx;
 133
 134         spin_lock_irqsave(&dp_priv->event_lock, flag);
 135         pndx = dp_priv->event_pndx + 1;
 136         pndx %= DP_EVENT_Q_MAX;
 137         if (pndx == dp_priv->event_gndx) {
 138                 pr_err("event_q is full: pndx=%d gndx=%d\n",
 139                         dp_priv->event_pndx, dp_priv->event_gndx);
 140                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 141                 return -EPERM;
 142         }
 143         todo = &dp_priv->event_list[dp_priv->event_pndx++];
 144         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
 145         todo->event_id = event;
 146         todo->data = data;
 147         todo->delay = delay;
 148         wake_up(&dp_priv->event_q);
 149         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 150
 151         return 0;
 152 }
 153
 154 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
 155 {
 156         unsigned long flag;
 157         struct dp_event *todo;
 158         u32     gndx;
 159
 160         spin_lock_irqsave(&dp_priv->event_lock, flag);
 161         if (dp_priv->event_pndx == dp_priv->event_gndx) {
 162                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 163                 return -ENOENT;
 164         }
 165
 166         gndx = dp_priv->event_gndx;
 167         while (dp_priv->event_pndx != gndx) {
 168                 todo = &dp_priv->event_list[gndx];
 169                 if (todo->event_id == event) {
 170                         todo->event_id = EV_NO_EVENT;   /* deleted */
 171                         todo->delay = 0;
 172                 }
 173                 gndx++;
 174                 gndx %= DP_EVENT_Q_MAX;
 175         }
 176         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 177
 178         return 0;
 179 }
 180
 181 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
 182 {
 183         struct dp_display_private *dp;
 184
 185         dp = container_of(dp_display, struct dp_display_private, dp_display);
 186
 187         complete_all(&dp->audio_comp);
 188 }
 189
 190 static int dp_display_bind(struct device *dev, struct device *master,
 191                            void *data)
 192 {
 193         int rc = 0;
 194         struct dp_display_private *dp;
 195         struct drm_device *drm;
 196         struct msm_drm_private *priv;
 197
 198         drm = dev_get_drvdata(master);
 199
 200         dp = container_of(g_dp_display,
 201                         struct dp_display_private, dp_display);
 202         if (!dp) {
 203                 DRM_ERROR("DP driver bind failed. Invalid driver data\n");
 204                 return -EINVAL;
 205         }
 206
 207         dp->dp_display.drm_dev = drm;
 208         priv = drm->dev_private;
 209         priv->dp = &(dp->dp_display);
 210
 211         rc = dp->parser->parse(dp->parser);
 212         if (rc) {
 213                 DRM_ERROR("device tree parsing failed\n");
 214                 goto end;
 215         }
 216
 217         rc = dp_aux_register(dp->aux);
 218         if (rc) {
 219                 DRM_ERROR("DRM DP AUX register failed\n");
 220                 goto end;
 221         }
 222
 223         rc = dp_power_client_init(dp->power);
 224         if (rc) {
 225                 DRM_ERROR("Power client create failed\n");
 226                 goto end;
 227         }
 228
 229         rc = dp_register_audio_driver(dev, dp->audio);
 230         if (rc)
 231                 DRM_ERROR("Audio registration Dp failed\n");
 232
 233 end:
 234         return rc;
 235 }
 236
 237 static void dp_display_unbind(struct device *dev, struct device *master,
 238                               void *data)
 239 {
 240         struct dp_display_private *dp;
 241         struct drm_device *drm = dev_get_drvdata(master);
 242         struct msm_drm_private *priv = drm->dev_private;
 243
 244         dp = container_of(g_dp_display,
 245                         struct dp_display_private, dp_display);
 246         if (!dp) {
 247                 DRM_ERROR("Invalid DP driver data\n");
 248                 return;
 249         }
 250
 251         dp_power_client_deinit(dp->power);
 252         dp_aux_unregister(dp->aux);
 253         priv->dp = NULL;
 254 }
 255
 256 static const struct component_ops dp_display_comp_ops = {
 257         .bind = dp_display_bind,
 258         .unbind = dp_display_unbind,
 259 };
 260
 261 static bool dp_display_is_ds_bridge(struct dp_panel *panel)
 262 {
 263         return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
 264                 DP_DWN_STRM_PORT_PRESENT);
 265 }
 266
 267 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
 268 {
 269         return dp_display_is_ds_bridge(dp->panel) &&
 270                 (dp->link->sink_count == 0);
 271 }
 272
 273 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
 274 {
 275         struct dp_display_private *dp;
 276         struct drm_connector *connector;
 277
 278         dp = container_of(dp_display, struct dp_display_private, dp_display);
 279
 280         connector = dp->dp_display.connector;
 281         drm_helper_hpd_irq_event(connector->dev);
 282 }
 283
 284
 285 static void dp_display_set_encoder_mode(struct dp_display_private *dp)
 286 {
 287         struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private;
 288         struct msm_kms *kms = priv->kms;
 289
 290         if (!dp->encoder_mode_set && dp->dp_display.encoder &&
 291                                 kms->funcs->set_encoder_mode) {
 292                 kms->funcs->set_encoder_mode(kms,
 293                                 dp->dp_display.encoder, false);
 294
 295                 dp->encoder_mode_set = true;
 296         }
 297 }
 298
 299 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 300                                             bool hpd)
 301 {
 302         if ((hpd && dp->dp_display.is_connected) ||
 303                         (!hpd && !dp->dp_display.is_connected)) {
 304                 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
 305                 return 0;
 306         }
 307
 308         /* reset video pattern flag on disconnect */
 309         if (!hpd)
 310                 dp->panel->video_test = false;
 311
 312         dp->dp_display.is_connected = hpd;
 313
 314         dp_display_send_hpd_event(&dp->dp_display);
 315
 316         return 0;
 317 }
 318
 319 static int dp_display_process_hpd_high(struct dp_display_private *dp)
 320 {
 321         int rc = 0;
 322         struct edid *edid;
 323
 324         dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
 325
 326         rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
 327         if (rc)
 328                 goto end;
 329
 330         dp_link_process_request(dp->link);
 331
 332         edid = dp->panel->edid;
 333
 334         dp->audio_supported = drm_detect_monitor_audio(edid);
 335         dp_panel_handle_sink_request(dp->panel);
 336
 337         dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
 338         dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
 339
 340         dp_link_reset_phy_params_vx_px(dp->link);
 341         rc = dp_ctrl_on_link(dp->ctrl);
 342         if (rc) {
 343                 DRM_ERROR("failed to complete DP link training\n");
 344                 goto end;
 345         }
 346
 347         dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
 348
 349 end:
 350         return rc;
 351 }
 352
 353 static void dp_display_host_init(struct dp_display_private *dp, int reset)
 354 {
 355         bool flip = false;
 356
 357         if (dp->core_initialized) {
 358                 DRM_DEBUG_DP("DP core already initialized\n");
 359                 return;
 360         }
 361
 362         if (dp->usbpd->orientation == ORIENTATION_CC2)
 363                 flip = true;
 364
 365         dp_display_set_encoder_mode(dp);
 366
 367         dp_power_init(dp->power, flip);
 368         dp_ctrl_host_init(dp->ctrl, flip, reset);
 369         dp_aux_init(dp->aux);
 370         dp->core_initialized = true;
 371 }
 372
 373 static void dp_display_host_deinit(struct dp_display_private *dp)
 374 {
 375         if (!dp->core_initialized) {
 376                 DRM_DEBUG_DP("DP core not initialized\n");
 377                 return;
 378         }
 379
 380         dp_ctrl_host_deinit(dp->ctrl);
 381         dp_aux_deinit(dp->aux);
 382         dp_power_deinit(dp->power);
 383
 384         dp->core_initialized = false;
 385 }
 386
 387 static int dp_display_usbpd_configure_cb(struct device *dev)
 388 {
 389         int rc = 0;
 390         struct dp_display_private *dp;
 391
 392         if (!dev) {
 393                 DRM_ERROR("invalid dev\n");
 394                 rc = -EINVAL;
 395                 goto end;
 396         }
 397
 398         dp = container_of(g_dp_display,
 399                         struct dp_display_private, dp_display);
 400         if (!dp) {
 401                 DRM_ERROR("no driver data found\n");
 402                 rc = -ENODEV;
 403                 goto end;
 404         }
 405
 406         dp_display_host_init(dp, false);
 407
 408         /*
 409          * set sink to normal operation mode -- D0
 410          * before dpcd read
 411          */
 412         dp_link_psm_config(dp->link, &dp->panel->link_info, false);
 413         rc = dp_display_process_hpd_high(dp);
 414 end:
 415         return rc;
 416 }
 417
 418 static int dp_display_usbpd_disconnect_cb(struct device *dev)
 419 {
 420         int rc = 0;
 421         struct dp_display_private *dp;
 422
 423         if (!dev) {
 424                 DRM_ERROR("invalid dev\n");
 425                 rc = -EINVAL;
 426                 return rc;
 427         }
 428
 429         dp = container_of(g_dp_display,
 430                         struct dp_display_private, dp_display);
 431         if (!dp) {
 432                 DRM_ERROR("no driver data found\n");
 433                 rc = -ENODEV;
 434                 return rc;
 435         }
 436
 437         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 438
 439         return rc;
 440 }
 441
 442 static void dp_display_handle_video_request(struct dp_display_private *dp)
 443 {
 444         if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
 445                 dp->panel->video_test = true;
 446                 dp_link_send_test_response(dp->link);
 447         }
 448 }
 449
 450 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
 451 {
 452         int rc = 0;
 453
 454         if (dp_display_is_sink_count_zero(dp)) {
 455                 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
 456                 if (dp->hpd_state != ST_DISCONNECTED) {
 457                         dp->hpd_state = ST_DISCONNECT_PENDING;
 458                         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 459                 }
 460         } else {
 461                 if (dp->hpd_state == ST_DISCONNECTED) {
 462                         dp->hpd_state = ST_CONNECT_PENDING;
 463                         rc = dp_display_process_hpd_high(dp);
 464                         if (rc)
 465                                 dp->hpd_state = ST_DISCONNECTED;
 466                 }
 467         }
 468
 469         return rc;
 470 }
 471
 472 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
 473 {
 474         u32 sink_request = dp->link->sink_request;
 475
 476         if (dp->hpd_state == ST_DISCONNECTED) {
 477                 if (sink_request & DP_LINK_STATUS_UPDATED) {
 478                         DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
 479                         return -EINVAL;
 480                 }
 481         }
 482
 483         dp_ctrl_handle_sink_request(dp->ctrl);
 484
 485         if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
 486                 dp_display_handle_video_request(dp);
 487
 488         return 0;
 489 }
 490
 491 static int dp_display_usbpd_attention_cb(struct device *dev)
 492 {
 493         int rc = 0;
 494         u32 sink_request;
 495         struct dp_display_private *dp;
 496         struct dp_usbpd *hpd;
 497
 498         if (!dev) {
 499                 DRM_ERROR("invalid dev\n");
 500                 return -EINVAL;
 501         }
 502
 503         dp = container_of(g_dp_display,
 504                         struct dp_display_private, dp_display);
 505         if (!dp) {
 506                 DRM_ERROR("no driver data found\n");
 507                 return -ENODEV;
 508         }
 509
 510         hpd = dp->usbpd;
 511
 512         /* check for any test request issued by sink */
 513         rc = dp_link_process_request(dp->link);
 514         if (!rc) {
 515                 sink_request = dp->link->sink_request;
 516                 if (sink_request & DS_PORT_STATUS_CHANGED)
 517                         rc = dp_display_handle_port_ststus_changed(dp);
 518                 else
 519                         rc = dp_display_handle_irq_hpd(dp);
 520         }
 521
 522         return rc;
 523 }
 524
 525 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 526 {
 527         struct dp_usbpd *hpd = dp->usbpd;
 528         u32 state;
 529         u32 tout = DP_TIMEOUT_5_SECOND;
 530         int ret;
 531
 532         if (!hpd)
 533                 return 0;
 534
 535         mutex_lock(&dp->event_mutex);
 536
 537         state =  dp->hpd_state;
 538         if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
 539                 mutex_unlock(&dp->event_mutex);
 540                 return 0;
 541         }
 542
 543         if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
 544                 mutex_unlock(&dp->event_mutex);
 545                 return 0;
 546         }
 547
 548         if (state == ST_DISCONNECT_PENDING) {
 549                 /* wait until ST_DISCONNECTED */
 550                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
 551                 mutex_unlock(&dp->event_mutex);
 552                 return 0;
 553         }
 554
 555         dp->hpd_state = ST_CONNECT_PENDING;
 556
 557         hpd->hpd_high = 1;
 558
 559         ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
 560         if (ret) {      /* link train failed */
 561                 hpd->hpd_high = 0;
 562                 dp->hpd_state = ST_DISCONNECTED;
 563
 564                 if (ret == -ECONNRESET) { /* cable unplugged */
 565                         dp->core_initialized = false;
 566                 }
 567
 568         } else {
 569                 /* start sentinel checking in case of missing uevent */
 570                 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
 571         }
 572
 573         mutex_unlock(&dp->event_mutex);
 574
 575         /* uevent will complete connection part */
 576         return 0;
 577 };
 578
 579 static int dp_display_enable(struct dp_display_private *dp, u32 data);
 580 static int dp_display_disable(struct dp_display_private *dp, u32 data);
 581
 582 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
 583 {
 584         u32 state;
 585
 586         mutex_lock(&dp->event_mutex);
 587
 588         state = dp->hpd_state;
 589         if (state == ST_CONNECT_PENDING) {
 590                 dp_display_enable(dp, 0);
 591                 dp->hpd_state = ST_CONNECTED;
 592         }
 593
 594         mutex_unlock(&dp->event_mutex);
 595
 596         return 0;
 597 }
 598
 599 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 600                 bool plugged)
 601 {
 602         struct dp_display_private *dp;
 603
 604         dp = container_of(dp_display,
 605                         struct dp_display_private, dp_display);
 606
 607         /* notify audio subsystem only if sink supports audio */
 608         if (dp_display->plugged_cb && dp_display->codec_dev &&
 609                         dp->audio_supported)
 610                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 611 }
 612
 613 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 614 {
 615         struct dp_usbpd *hpd = dp->usbpd;
 616         u32 state;
 617
 618         if (!hpd)
 619                 return 0;
 620
 621         mutex_lock(&dp->event_mutex);
 622
 623         state = dp->hpd_state;
 624         if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) {
 625                 mutex_unlock(&dp->event_mutex);
 626                 return 0;
 627         }
 628
 629         if (state == ST_CONNECT_PENDING) {
 630                 /* wait until CONNECTED */
 631                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
 632                 mutex_unlock(&dp->event_mutex);
 633                 return 0;
 634         }
 635
 636         dp->hpd_state = ST_DISCONNECT_PENDING;
 637
 638         /* disable HPD plug interrupt until disconnect is done */
 639         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK
 640                                 | DP_DP_IRQ_HPD_INT_MASK, false);
 641
 642         hpd->hpd_high = 0;
 643
 644         /*
 645          * We don't need separate work for disconnect as
 646          * connect/attention interrupts are disabled
 647          */
 648         dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
 649
 650         /* start sentinel checking in case of missing uevent */
 651         dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
 652
 653         /* signal the disconnect event early to ensure proper teardown */
 654         reinit_completion(&dp->audio_comp);
 655         dp_display_handle_plugged_change(g_dp_display, false);
 656
 657         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK |
 658                                         DP_DP_IRQ_HPD_INT_MASK, true);
 659
 660         /* uevent will complete disconnection part */
 661         mutex_unlock(&dp->event_mutex);
 662         return 0;
 663 }
 664
 665 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
 666 {
 667         u32 state;
 668
 669         mutex_lock(&dp->event_mutex);
 670
 671         state =  dp->hpd_state;
 672         if (state == ST_DISCONNECT_PENDING) {
 673                 dp_display_disable(dp, 0);
 674                 dp->hpd_state = ST_DISCONNECTED;
 675         }
 676
 677         mutex_unlock(&dp->event_mutex);
 678
 679         return 0;
 680 }
 681
 682 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 683 {
 684         u32 state;
 685         int ret;
 686
 687         mutex_lock(&dp->event_mutex);
 688
 689         /* irq_hpd can happen at either connected or disconnected state */
 690         state =  dp->hpd_state;
 691         if (state == ST_DISPLAY_OFF) {
 692                 mutex_unlock(&dp->event_mutex);
 693                 return 0;
 694         }
 695
 696         if (state == ST_CONNECT_PENDING) {
 697                 /* wait until ST_CONNECTED */
 698                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 699                 mutex_unlock(&dp->event_mutex);
 700                 return 0;
 701         }
 702
 703         if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
 704                 /* wait until ST_CONNECTED */
 705                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 706                 mutex_unlock(&dp->event_mutex);
 707                 return 0;
 708         }
 709
 710         ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
 711         if (ret == -ECONNRESET) { /* cable unplugged */
 712                 dp->core_initialized = false;
 713         }
 714
 715         mutex_unlock(&dp->event_mutex);
 716
 717         return 0;
 718 }
 719
 720 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 721 {
 722         dp_debug_put(dp->debug);
 723         dp_ctrl_put(dp->ctrl);
 724         dp_panel_put(dp->panel);
 725         dp_aux_put(dp->aux);
 726         dp_audio_put(dp->audio);
 727 }
 728
 729 static int dp_init_sub_modules(struct dp_display_private *dp)
 730 {
 731         int rc = 0;
 732         struct device *dev = &dp->pdev->dev;
 733         struct dp_usbpd_cb *cb = &dp->usbpd_cb;
 734         struct dp_panel_in panel_in = {
 735                 .dev = dev,
 736         };
 737
 738         /* Callback APIs used for cable status change event */
 739         cb->configure  = dp_display_usbpd_configure_cb;
 740         cb->disconnect = dp_display_usbpd_disconnect_cb;
 741         cb->attention  = dp_display_usbpd_attention_cb;
 742
 743         dp->usbpd = dp_hpd_get(dev, cb);
 744         if (IS_ERR(dp->usbpd)) {
 745                 rc = PTR_ERR(dp->usbpd);
 746                 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
 747                 dp->usbpd = NULL;
 748                 goto error;
 749         }
 750
 751         dp->parser = dp_parser_get(dp->pdev);
 752         if (IS_ERR(dp->parser)) {
 753                 rc = PTR_ERR(dp->parser);
 754                 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
 755                 dp->parser = NULL;
 756                 goto error;
 757         }
 758
 759         dp->catalog = dp_catalog_get(dev, &dp->parser->io);
 760         if (IS_ERR(dp->catalog)) {
 761                 rc = PTR_ERR(dp->catalog);
 762                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 763                 dp->catalog = NULL;
 764                 goto error;
 765         }
 766
 767         dp->power = dp_power_get(dev, dp->parser);
 768         if (IS_ERR(dp->power)) {
 769                 rc = PTR_ERR(dp->power);
 770                 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
 771                 dp->power = NULL;
 772                 goto error;
 773         }
 774
 775         dp->aux = dp_aux_get(dev, dp->catalog);
 776         if (IS_ERR(dp->aux)) {
 777                 rc = PTR_ERR(dp->aux);
 778                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 779                 dp->aux = NULL;
 780                 goto error;
 781         }
 782
 783         dp->link = dp_link_get(dev, dp->aux);
 784         if (IS_ERR(dp->link)) {
 785                 rc = PTR_ERR(dp->link);
 786                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 787                 dp->link = NULL;
 788                 goto error_link;
 789         }
 790
 791         panel_in.aux = dp->aux;
 792         panel_in.catalog = dp->catalog;
 793         panel_in.link = dp->link;
 794
 795         dp->panel = dp_panel_get(&panel_in);
 796         if (IS_ERR(dp->panel)) {
 797                 rc = PTR_ERR(dp->panel);
 798                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 799                 dp->panel = NULL;
 800                 goto error_link;
 801         }
 802
 803         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 804                                dp->power, dp->catalog, dp->parser);
 805         if (IS_ERR(dp->ctrl)) {
 806                 rc = PTR_ERR(dp->ctrl);
 807                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 808                 dp->ctrl = NULL;
 809                 goto error_ctrl;
 810         }
 811
 812         dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
 813         if (IS_ERR(dp->audio)) {
 814                 rc = PTR_ERR(dp->audio);
 815                 pr_err("failed to initialize audio, rc = %d\n", rc);
 816                 dp->audio = NULL;
 817                 goto error_audio;
 818         }
 819
 820         return rc;
 821
 822 error_audio:
 823         dp_ctrl_put(dp->ctrl);
 824 error_ctrl:
 825         dp_panel_put(dp->panel);
 826 error_link:
 827         dp_aux_put(dp->aux);
 828 error:
 829         return rc;
 830 }
 831
 832 static int dp_display_set_mode(struct msm_dp *dp_display,
 833                                struct dp_display_mode *mode)
 834 {
 835         struct dp_display_private *dp;
 836
 837         dp = container_of(dp_display, struct dp_display_private, dp_display);
 838
 839         dp->panel->dp_mode.drm_mode = mode->drm_mode;
 840         dp->panel->dp_mode.bpp = mode->bpp;
 841         dp->panel->dp_mode.capabilities = mode->capabilities;
 842         dp_panel_init_panel_info(dp->panel);
 843         return 0;
 844 }
 845
 846 static int dp_display_prepare(struct msm_dp *dp)
 847 {
 848         return 0;
 849 }
 850
 851 static int dp_display_enable(struct dp_display_private *dp, u32 data)
 852 {
 853         int rc = 0;
 854         struct msm_dp *dp_display;
 855
 856         dp_display = g_dp_display;
 857
 858         if (dp_display->power_on) {
 859                 DRM_DEBUG_DP("Link already setup, return\n");
 860                 return 0;
 861         }
 862
 863         rc = dp_ctrl_on_stream(dp->ctrl);
 864         if (!rc)
 865                 dp_display->power_on = true;
 866
 867         return rc;
 868 }
 869
 870 static int dp_display_post_enable(struct msm_dp *dp_display)
 871 {
 872         struct dp_display_private *dp;
 873         u32 rate;
 874
 875         dp = container_of(dp_display, struct dp_display_private, dp_display);
 876
 877         rate = dp->link->link_params.rate;
 878
 879         if (dp->audio_supported) {
 880                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 881                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 882         }
 883
 884         /* signal the connect event late to synchronize video and display */
 885         dp_display_handle_plugged_change(dp_display, true);
 886         return 0;
 887 }
 888
 889 static int dp_display_disable(struct dp_display_private *dp, u32 data)
 890 {
 891         struct msm_dp *dp_display;
 892
 893         dp_display = g_dp_display;
 894
 895         if (!dp_display->power_on)
 896                 return 0;
 897
 898         /* wait only if audio was enabled */
 899         if (dp_display->audio_enabled) {
 900                 /* signal the disconnect event */
 901                 reinit_completion(&dp->audio_comp);
 902                 dp_display_handle_plugged_change(dp_display, false);
 903                 if (!wait_for_completion_timeout(&dp->audio_comp,
 904                                 HZ * 5))
 905                         DRM_ERROR("audio comp timeout\n");
 906         }
 907
 908         dp_display->audio_enabled = false;
 909
 910         dp_ctrl_off(dp->ctrl);
 911
 912         dp->core_initialized = false;
 913
 914         dp_display->power_on = false;
 915
 916         return 0;
 917 }
 918
 919 static int dp_display_unprepare(struct msm_dp *dp)
 920 {
 921         return 0;
 922 }
 923
 924 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 925                 hdmi_codec_plugged_cb fn, struct device *codec_dev)
 926 {
 927         bool plugged;
 928
 929         dp_display->plugged_cb = fn;
 930         dp_display->codec_dev = codec_dev;
 931         plugged = dp_display->is_connected;
 932         dp_display_handle_plugged_change(dp_display, plugged);
 933
 934         return 0;
 935 }
 936
 937 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
 938 {
 939         const u32 num_components = 3, default_bpp = 24;
 940         struct dp_display_private *dp_display;
 941         struct dp_link_info *link_info;
 942         u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
 943
 944         if (!dp || !mode_pclk_khz || !dp->connector) {
 945                 DRM_ERROR("invalid params\n");
 946                 return -EINVAL;
 947         }
 948
 949         dp_display = container_of(dp, struct dp_display_private, dp_display);
 950         link_info = &dp_display->panel->link_info;
 951
 952         mode_bpp = dp->connector->display_info.bpc * num_components;
 953         if (!mode_bpp)
 954                 mode_bpp = default_bpp;
 955
 956         mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
 957                         mode_bpp, mode_pclk_khz);
 958
 959         mode_rate_khz = mode_pclk_khz * mode_bpp;
 960         supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
 961
 962         if (mode_rate_khz > supported_rate_khz)
 963                 return MODE_BAD;
 964
 965         return MODE_OK;
 966 }
 967
 968 int dp_display_get_modes(struct msm_dp *dp,
 969                                 struct dp_display_mode *dp_mode)
 970 {
 971         struct dp_display_private *dp_display;
 972         int ret = 0;
 973
 974         if (!dp) {
 975                 DRM_ERROR("invalid params\n");
 976                 return 0;
 977         }
 978
 979         dp_display = container_of(dp, struct dp_display_private, dp_display);
 980
 981         ret = dp_panel_get_modes(dp_display->panel,
 982                 dp->connector, dp_mode);
 983         if (dp_mode->drm_mode.clock)
 984                 dp->max_pclk_khz = dp_mode->drm_mode.clock;
 985         return ret;
 986 }
 987
 988 bool dp_display_check_video_test(struct msm_dp *dp)
 989 {
 990         struct dp_display_private *dp_display;
 991
 992         dp_display = container_of(dp, struct dp_display_private, dp_display);
 993
 994         return dp_display->panel->video_test;
 995 }
 996
 997 int dp_display_get_test_bpp(struct msm_dp *dp)
 998 {
 999         struct dp_display_private *dp_display;
1000
1001         if (!dp) {
1002                 DRM_ERROR("invalid params\n");
1003                 return 0;
1004         }
1005
1006         dp_display = container_of(dp, struct dp_display_private, dp_display);
1007
1008         return dp_link_bit_depth_to_bpp(
1009                 dp_display->link->test_video.test_bit_depth);
1010 }
1011
1012 static void dp_display_config_hpd(struct dp_display_private *dp)
1013 {
1014
1015         dp_display_host_init(dp, true);
1016         dp_catalog_ctrl_hpd_config(dp->catalog);
1017
1018         /* Enable interrupt first time
1019          * we are leaving dp clocks on during disconnect
1020          * and never disable interrupt
1021          */
1022         enable_irq(dp->irq);
1023 }
1024
1025 static int hpd_event_thread(void *data)
1026 {
1027         struct dp_display_private *dp_priv;
1028         unsigned long flag;
1029         struct dp_event *todo;
1030         int timeout_mode = 0;
1031
1032         dp_priv = (struct dp_display_private *)data;
1033
1034         while (1) {
1035                 if (timeout_mode) {
1036                         wait_event_timeout(dp_priv->event_q,
1037                                 (dp_priv->event_pndx == dp_priv->event_gndx),
1038                                                 EVENT_TIMEOUT);
1039                 } else {
1040                         wait_event_interruptible(dp_priv->event_q,
1041                                 (dp_priv->event_pndx != dp_priv->event_gndx));
1042                 }
1043                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1044                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1045                 if (todo->delay) {
1046                         struct dp_event *todo_next;
1047
1048                         dp_priv->event_gndx++;
1049                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1050
1051                         /* re enter delay event into q */
1052                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1053                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1054                         todo_next->event_id = todo->event_id;
1055                         todo_next->data = todo->data;
1056                         todo_next->delay = todo->delay - 1;
1057
1058                         /* clean up older event */
1059                         todo->event_id = EV_NO_EVENT;
1060                         todo->delay = 0;
1061
1062                         /* switch to timeout mode */
1063                         timeout_mode = 1;
1064                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1065                         continue;
1066                 }
1067
1068                 /* timeout with no events in q */
1069                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1070                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1071                         continue;
1072                 }
1073
1074                 dp_priv->event_gndx++;
1075                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1076                 timeout_mode = 0;
1077                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1078
1079                 switch (todo->event_id) {
1080                 case EV_HPD_INIT_SETUP:
1081                         dp_display_config_hpd(dp_priv);
1082                         break;
1083                 case EV_HPD_PLUG_INT:
1084                         dp_hpd_plug_handle(dp_priv, todo->data);
1085                         break;
1086                 case EV_HPD_UNPLUG_INT:
1087                         dp_hpd_unplug_handle(dp_priv, todo->data);
1088                         break;
1089                 case EV_IRQ_HPD_INT:
1090                         dp_irq_hpd_handle(dp_priv, todo->data);
1091                         break;
1092                 case EV_HPD_REPLUG_INT:
1093                         /* do nothing */
1094                         break;
1095                 case EV_USER_NOTIFICATION:
1096                         dp_display_send_hpd_notification(dp_priv,
1097                                                 todo->data);
1098                         break;
1099                 case EV_CONNECT_PENDING_TIMEOUT:
1100                         dp_connect_pending_timeout(dp_priv,
1101                                                 todo->data);
1102                         break;
1103                 case EV_DISCONNECT_PENDING_TIMEOUT:
1104                         dp_disconnect_pending_timeout(dp_priv,
1105                                                 todo->data);
1106                         break;
1107                 default:
1108                         break;
1109                 }
1110         }
1111
1112         return 0;
1113 }
1114
1115 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1116 {
1117         init_waitqueue_head(&dp_priv->event_q);
1118         spin_lock_init(&dp_priv->event_lock);
1119
1120         kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1121 }
1122
1123 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1124 {
1125         struct dp_display_private *dp = dev_id;
1126         irqreturn_t ret = IRQ_HANDLED;
1127         u32 hpd_isr_status;
1128
1129         if (!dp) {
1130                 DRM_ERROR("invalid data\n");
1131                 return IRQ_NONE;
1132         }
1133
1134         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1135
1136         if (hpd_isr_status & 0x0F) {
1137                 /* hpd related interrupts */
1138                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1139                         hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1140                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1141                 }
1142
1143                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1144                         /* stop sentinel connect pending checking */
1145                         dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
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_REPLUG_INT, 0, 0);
1151
1152                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1153                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1154         }
1155
1156         /* DP controller isr */
1157         dp_ctrl_isr(dp->ctrl);
1158
1159         /* DP aux isr */
1160         dp_aux_isr(dp->aux);
1161
1162         return ret;
1163 }
1164
1165 int dp_display_request_irq(struct msm_dp *dp_display)
1166 {
1167         int rc = 0;
1168         struct dp_display_private *dp;
1169
1170         if (!dp_display) {
1171                 DRM_ERROR("invalid input\n");
1172                 return -EINVAL;
1173         }
1174
1175         dp = container_of(dp_display, struct dp_display_private, dp_display);
1176
1177         dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1178         if (dp->irq < 0) {
1179                 rc = dp->irq;
1180                 DRM_ERROR("failed to get irq: %d\n", rc);
1181                 return rc;
1182         }
1183
1184         rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1185                         dp_display_irq_handler,
1186                         IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1187         if (rc < 0) {
1188                 DRM_ERROR("failed to request IRQ%u: %d\n",
1189                                 dp->irq, rc);
1190                 return rc;
1191         }
1192         disable_irq(dp->irq);
1193
1194         return 0;
1195 }
1196
1197 static int dp_display_probe(struct platform_device *pdev)
1198 {
1199         int rc = 0;
1200         struct dp_display_private *dp;
1201
1202         if (!pdev || !pdev->dev.of_node) {
1203                 DRM_ERROR("pdev not found\n");
1204                 return -ENODEV;
1205         }
1206
1207         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1208         if (!dp)
1209                 return -ENOMEM;
1210
1211         dp->pdev = pdev;
1212         dp->name = "drm_dp";
1213
1214         rc = dp_init_sub_modules(dp);
1215         if (rc) {
1216                 DRM_ERROR("init sub module failed\n");
1217                 return -EPROBE_DEFER;
1218         }
1219
1220         mutex_init(&dp->event_mutex);
1221         g_dp_display = &dp->dp_display;
1222
1223         /* Store DP audio handle inside DP display */
1224         g_dp_display->dp_audio = dp->audio;
1225
1226         init_completion(&dp->audio_comp);
1227
1228         platform_set_drvdata(pdev, g_dp_display);
1229
1230         rc = component_add(&pdev->dev, &dp_display_comp_ops);
1231         if (rc) {
1232                 DRM_ERROR("component add failed, rc=%d\n", rc);
1233                 dp_display_deinit_sub_modules(dp);
1234         }
1235
1236         return rc;
1237 }
1238
1239 static int dp_display_remove(struct platform_device *pdev)
1240 {
1241         struct dp_display_private *dp;
1242
1243         dp = container_of(g_dp_display,
1244                         struct dp_display_private, dp_display);
1245
1246         dp_display_deinit_sub_modules(dp);
1247
1248         component_del(&pdev->dev, &dp_display_comp_ops);
1249         platform_set_drvdata(pdev, NULL);
1250
1251         return 0;
1252 }
1253
1254 static int dp_pm_resume(struct device *dev)
1255 {
1256         struct platform_device *pdev = to_platform_device(dev);
1257         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1258         struct dp_display_private *dp;
1259         u32 status;
1260
1261         dp = container_of(dp_display, struct dp_display_private, dp_display);
1262
1263         mutex_lock(&dp->event_mutex);
1264
1265         /* start from disconnected state */
1266         dp->hpd_state = ST_DISCONNECTED;
1267
1268         /* turn on dp ctrl/phy */
1269         dp_display_host_init(dp, true);
1270
1271         dp_catalog_ctrl_hpd_config(dp->catalog);
1272
1273         status = dp_catalog_link_is_connected(dp->catalog);
1274
1275         if (status)
1276                 dp->dp_display.is_connected = true;
1277         else
1278                 dp->dp_display.is_connected = false;
1279
1280         mutex_unlock(&dp->event_mutex);
1281
1282         return 0;
1283 }
1284
1285 static int dp_pm_suspend(struct device *dev)
1286 {
1287         struct platform_device *pdev = to_platform_device(dev);
1288         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1289         struct dp_display_private *dp;
1290
1291         dp = container_of(dp_display, struct dp_display_private, dp_display);
1292
1293         mutex_lock(&dp->event_mutex);
1294
1295         if (dp->core_initialized == true)
1296                 dp_display_host_deinit(dp);
1297
1298         dp->hpd_state = ST_SUSPENDED;
1299
1300         /* host_init will be called at pm_resume */
1301         dp->core_initialized = false;
1302
1303         mutex_unlock(&dp->event_mutex);
1304
1305         return 0;
1306 }
1307
1308 static int dp_pm_prepare(struct device *dev)
1309 {
1310         return 0;
1311 }
1312
1313 static void dp_pm_complete(struct device *dev)
1314 {
1315
1316 }
1317
1318 static const struct dev_pm_ops dp_pm_ops = {
1319         .suspend = dp_pm_suspend,
1320         .resume =  dp_pm_resume,
1321         .prepare = dp_pm_prepare,
1322         .complete = dp_pm_complete,
1323 };
1324
1325 static struct platform_driver dp_display_driver = {
1326         .probe  = dp_display_probe,
1327         .remove = dp_display_remove,
1328         .driver = {
1329                 .name = "msm-dp-display",
1330                 .of_match_table = dp_dt_match,
1331                 .suppress_bind_attrs = true,
1332                 .pm = &dp_pm_ops,
1333         },
1334 };
1335
1336 int __init msm_dp_register(void)
1337 {
1338         int ret;
1339
1340         ret = platform_driver_register(&dp_display_driver);
1341         if (ret)
1342                 DRM_ERROR("Dp display driver register failed");
1343
1344         return ret;
1345 }
1346
1347 void __exit msm_dp_unregister(void)
1348 {
1349         platform_driver_unregister(&dp_display_driver);
1350 }
1351
1352 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1353 {
1354         struct dp_display_private *dp;
1355
1356         if (!dp_display)
1357                 return;
1358
1359         dp = container_of(dp_display, struct dp_display_private, dp_display);
1360
1361         dp_hpd_event_setup(dp);
1362
1363         dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1364 }
1365
1366 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1367 {
1368         struct dp_display_private *dp;
1369         struct device *dev;
1370         int rc;
1371
1372         dp = container_of(dp_display, struct dp_display_private, dp_display);
1373         dev = &dp->pdev->dev;
1374
1375         dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1376                                         dp->link, &dp->dp_display.connector,
1377                                         minor);
1378         if (IS_ERR(dp->debug)) {
1379                 rc = PTR_ERR(dp->debug);
1380                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1381                 dp->debug = NULL;
1382         }
1383 }
1384
1385 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1386                         struct drm_encoder *encoder)
1387 {
1388         struct msm_drm_private *priv;
1389         int ret;
1390
1391         if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1392                 return -EINVAL;
1393
1394         priv = dev->dev_private;
1395         dp_display->drm_dev = dev;
1396
1397         ret = dp_display_request_irq(dp_display);
1398         if (ret) {
1399                 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1400                 return ret;
1401         }
1402
1403         dp_display->encoder = encoder;
1404
1405         dp_display->connector = dp_drm_connector_init(dp_display);
1406         if (IS_ERR(dp_display->connector)) {
1407                 ret = PTR_ERR(dp_display->connector);
1408                 DRM_DEV_ERROR(dev->dev,
1409                         "failed to create dp connector: %d\n", ret);
1410                 dp_display->connector = NULL;
1411                 return ret;
1412         }
1413
1414         priv->connectors[priv->num_connectors++] = dp_display->connector;
1415         return 0;
1416 }
1417
1418 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1419 {
1420         int rc = 0;
1421         struct dp_display_private *dp_display;
1422         u32 state;
1423
1424         dp_display = container_of(dp, struct dp_display_private, dp_display);
1425         if (!dp_display->dp_mode.drm_mode.clock) {
1426                 DRM_ERROR("invalid params\n");
1427                 return -EINVAL;
1428         }
1429
1430         mutex_lock(&dp_display->event_mutex);
1431
1432         /* stop sentinel checking */
1433         dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1434
1435         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1436         if (rc) {
1437                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1438                 mutex_unlock(&dp_display->event_mutex);
1439                 return rc;
1440         }
1441
1442         rc = dp_display_prepare(dp);
1443         if (rc) {
1444                 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1445                 mutex_unlock(&dp_display->event_mutex);
1446                 return rc;
1447         }
1448
1449         state =  dp_display->hpd_state;
1450
1451         if (state == ST_DISPLAY_OFF)
1452                 dp_display_host_init(dp_display, true);
1453
1454         dp_display_enable(dp_display, 0);
1455
1456         rc = dp_display_post_enable(dp);
1457         if (rc) {
1458                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1459                 dp_display_disable(dp_display, 0);
1460                 dp_display_unprepare(dp);
1461         }
1462
1463         /* manual kick off plug event to train link */
1464         if (state == ST_DISPLAY_OFF)
1465                 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1466
1467         /* completed connection */
1468         dp_display->hpd_state = ST_CONNECTED;
1469
1470         mutex_unlock(&dp_display->event_mutex);
1471
1472         return rc;
1473 }
1474
1475 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1476 {
1477         struct dp_display_private *dp_display;
1478
1479         dp_display = container_of(dp, struct dp_display_private, dp_display);
1480
1481         dp_ctrl_push_idle(dp_display->ctrl);
1482
1483         return 0;
1484 }
1485
1486 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1487 {
1488         int rc = 0;
1489         u32 state;
1490         struct dp_display_private *dp_display;
1491
1492         dp_display = container_of(dp, struct dp_display_private, dp_display);
1493
1494         mutex_lock(&dp_display->event_mutex);
1495
1496         /* stop sentinel checking */
1497         dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1498
1499         dp_display_disable(dp_display, 0);
1500
1501         rc = dp_display_unprepare(dp);
1502         if (rc)
1503                 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1504
1505         state =  dp_display->hpd_state;
1506         if (state == ST_DISCONNECT_PENDING) {
1507                 /* completed disconnection */
1508                 dp_display->hpd_state = ST_DISCONNECTED;
1509         } else {
1510                 dp_display->hpd_state = ST_DISPLAY_OFF;
1511         }
1512
1513         mutex_unlock(&dp_display->event_mutex);
1514         return rc;
1515 }
1516
1517 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1518                                 struct drm_display_mode *mode,
1519                                 struct drm_display_mode *adjusted_mode)
1520 {
1521         struct dp_display_private *dp_display;
1522
1523         dp_display = container_of(dp, struct dp_display_private, dp_display);
1524
1525         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1526
1527         if (dp_display_check_video_test(dp))
1528                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1529         else /* Default num_components per pixel = 3 */
1530                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1531
1532         if (!dp_display->dp_mode.bpp)
1533                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1534
1535         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1536
1537         dp_display->dp_mode.v_active_low =
1538                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1539
1540         dp_display->dp_mode.h_active_low =
1541                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1542 }