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->hpd_state = ST_CONNECTED;
 591
 592         mutex_unlock(&dp->event_mutex);
 593
 594         return 0;
 595 }
 596
 597 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 598                 bool plugged)
 599 {
 600         struct dp_display_private *dp;
 601
 602         dp = container_of(dp_display,
 603                         struct dp_display_private, dp_display);
 604
 605         /* notify audio subsystem only if sink supports audio */
 606         if (dp_display->plugged_cb && dp_display->codec_dev &&
 607                         dp->audio_supported)
 608                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 609 }
 610
 611 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 612 {
 613         struct dp_usbpd *hpd = dp->usbpd;
 614         u32 state;
 615
 616         if (!hpd)
 617                 return 0;
 618
 619         mutex_lock(&dp->event_mutex);
 620
 621         state = dp->hpd_state;
 622         if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) {
 623                 mutex_unlock(&dp->event_mutex);
 624                 return 0;
 625         }
 626
 627         if (state == ST_CONNECT_PENDING) {
 628                 /* wait until CONNECTED */
 629                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
 630                 mutex_unlock(&dp->event_mutex);
 631                 return 0;
 632         }
 633
 634         dp->hpd_state = ST_DISCONNECT_PENDING;
 635
 636         /* disable HPD plug interrupt until disconnect is done */
 637         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK
 638                                 | DP_DP_IRQ_HPD_INT_MASK, false);
 639
 640         hpd->hpd_high = 0;
 641
 642         /*
 643          * We don't need separate work for disconnect as
 644          * connect/attention interrupts are disabled
 645          */
 646         dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
 647
 648         /* start sentinel checking in case of missing uevent */
 649         dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
 650
 651         /* signal the disconnect event early to ensure proper teardown */
 652         reinit_completion(&dp->audio_comp);
 653         dp_display_handle_plugged_change(g_dp_display, false);
 654
 655         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK |
 656                                         DP_DP_IRQ_HPD_INT_MASK, true);
 657
 658         /* uevent will complete disconnection part */
 659         mutex_unlock(&dp->event_mutex);
 660         return 0;
 661 }
 662
 663 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
 664 {
 665         u32 state;
 666
 667         mutex_lock(&dp->event_mutex);
 668
 669         state =  dp->hpd_state;
 670         if (state == ST_DISCONNECT_PENDING)
 671                 dp->hpd_state = ST_DISCONNECTED;
 672
 673         mutex_unlock(&dp->event_mutex);
 674
 675         return 0;
 676 }
 677
 678 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 679 {
 680         u32 state;
 681         int ret;
 682
 683         mutex_lock(&dp->event_mutex);
 684
 685         /* irq_hpd can happen at either connected or disconnected state */
 686         state =  dp->hpd_state;
 687         if (state == ST_DISPLAY_OFF) {
 688                 mutex_unlock(&dp->event_mutex);
 689                 return 0;
 690         }
 691
 692         if (state == ST_CONNECT_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         if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
 700                 /* wait until ST_CONNECTED */
 701                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 702                 mutex_unlock(&dp->event_mutex);
 703                 return 0;
 704         }
 705
 706         ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
 707         if (ret == -ECONNRESET) { /* cable unplugged */
 708                 dp->core_initialized = false;
 709         }
 710
 711         mutex_unlock(&dp->event_mutex);
 712
 713         return 0;
 714 }
 715
 716 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 717 {
 718         dp_debug_put(dp->debug);
 719         dp_ctrl_put(dp->ctrl);
 720         dp_panel_put(dp->panel);
 721         dp_aux_put(dp->aux);
 722         dp_audio_put(dp->audio);
 723 }
 724
 725 static int dp_init_sub_modules(struct dp_display_private *dp)
 726 {
 727         int rc = 0;
 728         struct device *dev = &dp->pdev->dev;
 729         struct dp_usbpd_cb *cb = &dp->usbpd_cb;
 730         struct dp_panel_in panel_in = {
 731                 .dev = dev,
 732         };
 733
 734         /* Callback APIs used for cable status change event */
 735         cb->configure  = dp_display_usbpd_configure_cb;
 736         cb->disconnect = dp_display_usbpd_disconnect_cb;
 737         cb->attention  = dp_display_usbpd_attention_cb;
 738
 739         dp->usbpd = dp_hpd_get(dev, cb);
 740         if (IS_ERR(dp->usbpd)) {
 741                 rc = PTR_ERR(dp->usbpd);
 742                 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
 743                 dp->usbpd = NULL;
 744                 goto error;
 745         }
 746
 747         dp->parser = dp_parser_get(dp->pdev);
 748         if (IS_ERR(dp->parser)) {
 749                 rc = PTR_ERR(dp->parser);
 750                 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
 751                 dp->parser = NULL;
 752                 goto error;
 753         }
 754
 755         dp->catalog = dp_catalog_get(dev, &dp->parser->io);
 756         if (IS_ERR(dp->catalog)) {
 757                 rc = PTR_ERR(dp->catalog);
 758                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 759                 dp->catalog = NULL;
 760                 goto error;
 761         }
 762
 763         dp->power = dp_power_get(dev, dp->parser);
 764         if (IS_ERR(dp->power)) {
 765                 rc = PTR_ERR(dp->power);
 766                 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
 767                 dp->power = NULL;
 768                 goto error;
 769         }
 770
 771         dp->aux = dp_aux_get(dev, dp->catalog);
 772         if (IS_ERR(dp->aux)) {
 773                 rc = PTR_ERR(dp->aux);
 774                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 775                 dp->aux = NULL;
 776                 goto error;
 777         }
 778
 779         dp->link = dp_link_get(dev, dp->aux);
 780         if (IS_ERR(dp->link)) {
 781                 rc = PTR_ERR(dp->link);
 782                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 783                 dp->link = NULL;
 784                 goto error_link;
 785         }
 786
 787         panel_in.aux = dp->aux;
 788         panel_in.catalog = dp->catalog;
 789         panel_in.link = dp->link;
 790
 791         dp->panel = dp_panel_get(&panel_in);
 792         if (IS_ERR(dp->panel)) {
 793                 rc = PTR_ERR(dp->panel);
 794                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 795                 dp->panel = NULL;
 796                 goto error_link;
 797         }
 798
 799         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 800                                dp->power, dp->catalog, dp->parser);
 801         if (IS_ERR(dp->ctrl)) {
 802                 rc = PTR_ERR(dp->ctrl);
 803                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 804                 dp->ctrl = NULL;
 805                 goto error_ctrl;
 806         }
 807
 808         dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
 809         if (IS_ERR(dp->audio)) {
 810                 rc = PTR_ERR(dp->audio);
 811                 pr_err("failed to initialize audio, rc = %d\n", rc);
 812                 dp->audio = NULL;
 813                 goto error_audio;
 814         }
 815
 816         return rc;
 817
 818 error_audio:
 819         dp_ctrl_put(dp->ctrl);
 820 error_ctrl:
 821         dp_panel_put(dp->panel);
 822 error_link:
 823         dp_aux_put(dp->aux);
 824 error:
 825         return rc;
 826 }
 827
 828 static int dp_display_set_mode(struct msm_dp *dp_display,
 829                                struct dp_display_mode *mode)
 830 {
 831         struct dp_display_private *dp;
 832
 833         dp = container_of(dp_display, struct dp_display_private, dp_display);
 834
 835         dp->panel->dp_mode.drm_mode = mode->drm_mode;
 836         dp->panel->dp_mode.bpp = mode->bpp;
 837         dp->panel->dp_mode.capabilities = mode->capabilities;
 838         dp_panel_init_panel_info(dp->panel);
 839         return 0;
 840 }
 841
 842 static int dp_display_prepare(struct msm_dp *dp)
 843 {
 844         return 0;
 845 }
 846
 847 static int dp_display_enable(struct dp_display_private *dp, u32 data)
 848 {
 849         int rc = 0;
 850         struct msm_dp *dp_display;
 851
 852         dp_display = g_dp_display;
 853
 854         if (dp_display->power_on) {
 855                 DRM_DEBUG_DP("Link already setup, return\n");
 856                 return 0;
 857         }
 858
 859         rc = dp_ctrl_on_stream(dp->ctrl);
 860         if (!rc)
 861                 dp_display->power_on = true;
 862
 863         return rc;
 864 }
 865
 866 static int dp_display_post_enable(struct msm_dp *dp_display)
 867 {
 868         struct dp_display_private *dp;
 869         u32 rate;
 870
 871         dp = container_of(dp_display, struct dp_display_private, dp_display);
 872
 873         rate = dp->link->link_params.rate;
 874
 875         if (dp->audio_supported) {
 876                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 877                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 878         }
 879
 880         /* signal the connect event late to synchronize video and display */
 881         dp_display_handle_plugged_change(dp_display, true);
 882         return 0;
 883 }
 884
 885 static int dp_display_disable(struct dp_display_private *dp, u32 data)
 886 {
 887         struct msm_dp *dp_display;
 888
 889         dp_display = g_dp_display;
 890
 891         if (!dp_display->power_on)
 892                 return 0;
 893
 894         /* wait only if audio was enabled */
 895         if (dp_display->audio_enabled) {
 896                 /* signal the disconnect event */
 897                 reinit_completion(&dp->audio_comp);
 898                 dp_display_handle_plugged_change(dp_display, false);
 899                 if (!wait_for_completion_timeout(&dp->audio_comp,
 900                                 HZ * 5))
 901                         DRM_ERROR("audio comp timeout\n");
 902         }
 903
 904         dp_display->audio_enabled = false;
 905
 906         dp_ctrl_off(dp->ctrl);
 907
 908         dp->core_initialized = false;
 909
 910         dp_display->power_on = false;
 911
 912         return 0;
 913 }
 914
 915 static int dp_display_unprepare(struct msm_dp *dp)
 916 {
 917         return 0;
 918 }
 919
 920 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 921                 hdmi_codec_plugged_cb fn, struct device *codec_dev)
 922 {
 923         bool plugged;
 924
 925         dp_display->plugged_cb = fn;
 926         dp_display->codec_dev = codec_dev;
 927         plugged = dp_display->is_connected;
 928         dp_display_handle_plugged_change(dp_display, plugged);
 929
 930         return 0;
 931 }
 932
 933 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
 934 {
 935         const u32 num_components = 3, default_bpp = 24;
 936         struct dp_display_private *dp_display;
 937         struct dp_link_info *link_info;
 938         u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
 939
 940         if (!dp || !mode_pclk_khz || !dp->connector) {
 941                 DRM_ERROR("invalid params\n");
 942                 return -EINVAL;
 943         }
 944
 945         dp_display = container_of(dp, struct dp_display_private, dp_display);
 946         link_info = &dp_display->panel->link_info;
 947
 948         mode_bpp = dp->connector->display_info.bpc * num_components;
 949         if (!mode_bpp)
 950                 mode_bpp = default_bpp;
 951
 952         mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
 953                         mode_bpp, mode_pclk_khz);
 954
 955         mode_rate_khz = mode_pclk_khz * mode_bpp;
 956         supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
 957
 958         if (mode_rate_khz > supported_rate_khz)
 959                 return MODE_BAD;
 960
 961         return MODE_OK;
 962 }
 963
 964 int dp_display_get_modes(struct msm_dp *dp,
 965                                 struct dp_display_mode *dp_mode)
 966 {
 967         struct dp_display_private *dp_display;
 968         int ret = 0;
 969
 970         if (!dp) {
 971                 DRM_ERROR("invalid params\n");
 972                 return 0;
 973         }
 974
 975         dp_display = container_of(dp, struct dp_display_private, dp_display);
 976
 977         ret = dp_panel_get_modes(dp_display->panel,
 978                 dp->connector, dp_mode);
 979         if (dp_mode->drm_mode.clock)
 980                 dp->max_pclk_khz = dp_mode->drm_mode.clock;
 981         return ret;
 982 }
 983
 984 bool dp_display_check_video_test(struct msm_dp *dp)
 985 {
 986         struct dp_display_private *dp_display;
 987
 988         dp_display = container_of(dp, struct dp_display_private, dp_display);
 989
 990         return dp_display->panel->video_test;
 991 }
 992
 993 int dp_display_get_test_bpp(struct msm_dp *dp)
 994 {
 995         struct dp_display_private *dp_display;
 996
 997         if (!dp) {
 998                 DRM_ERROR("invalid params\n");
 999                 return 0;
1000         }
1001
1002         dp_display = container_of(dp, struct dp_display_private, dp_display);
1003
1004         return dp_link_bit_depth_to_bpp(
1005                 dp_display->link->test_video.test_bit_depth);
1006 }
1007
1008 static void dp_display_config_hpd(struct dp_display_private *dp)
1009 {
1010
1011         dp_display_host_init(dp, true);
1012         dp_catalog_ctrl_hpd_config(dp->catalog);
1013
1014         /* Enable interrupt first time
1015          * we are leaving dp clocks on during disconnect
1016          * and never disable interrupt
1017          */
1018         enable_irq(dp->irq);
1019 }
1020
1021 static int hpd_event_thread(void *data)
1022 {
1023         struct dp_display_private *dp_priv;
1024         unsigned long flag;
1025         struct dp_event *todo;
1026         int timeout_mode = 0;
1027
1028         dp_priv = (struct dp_display_private *)data;
1029
1030         while (1) {
1031                 if (timeout_mode) {
1032                         wait_event_timeout(dp_priv->event_q,
1033                                 (dp_priv->event_pndx == dp_priv->event_gndx),
1034                                                 EVENT_TIMEOUT);
1035                 } else {
1036                         wait_event_interruptible(dp_priv->event_q,
1037                                 (dp_priv->event_pndx != dp_priv->event_gndx));
1038                 }
1039                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1040                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1041                 if (todo->delay) {
1042                         struct dp_event *todo_next;
1043
1044                         dp_priv->event_gndx++;
1045                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1046
1047                         /* re enter delay event into q */
1048                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1049                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1050                         todo_next->event_id = todo->event_id;
1051                         todo_next->data = todo->data;
1052                         todo_next->delay = todo->delay - 1;
1053
1054                         /* clean up older event */
1055                         todo->event_id = EV_NO_EVENT;
1056                         todo->delay = 0;
1057
1058                         /* switch to timeout mode */
1059                         timeout_mode = 1;
1060                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1061                         continue;
1062                 }
1063
1064                 /* timeout with no events in q */
1065                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1066                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1067                         continue;
1068                 }
1069
1070                 dp_priv->event_gndx++;
1071                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1072                 timeout_mode = 0;
1073                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1074
1075                 switch (todo->event_id) {
1076                 case EV_HPD_INIT_SETUP:
1077                         dp_display_config_hpd(dp_priv);
1078                         break;
1079                 case EV_HPD_PLUG_INT:
1080                         dp_hpd_plug_handle(dp_priv, todo->data);
1081                         break;
1082                 case EV_HPD_UNPLUG_INT:
1083                         dp_hpd_unplug_handle(dp_priv, todo->data);
1084                         break;
1085                 case EV_IRQ_HPD_INT:
1086                         dp_irq_hpd_handle(dp_priv, todo->data);
1087                         break;
1088                 case EV_HPD_REPLUG_INT:
1089                         /* do nothing */
1090                         break;
1091                 case EV_USER_NOTIFICATION:
1092                         dp_display_send_hpd_notification(dp_priv,
1093                                                 todo->data);
1094                         break;
1095                 case EV_CONNECT_PENDING_TIMEOUT:
1096                         dp_connect_pending_timeout(dp_priv,
1097                                                 todo->data);
1098                         break;
1099                 case EV_DISCONNECT_PENDING_TIMEOUT:
1100                         dp_disconnect_pending_timeout(dp_priv,
1101                                                 todo->data);
1102                         break;
1103                 default:
1104                         break;
1105                 }
1106         }
1107
1108         return 0;
1109 }
1110
1111 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1112 {
1113         init_waitqueue_head(&dp_priv->event_q);
1114         spin_lock_init(&dp_priv->event_lock);
1115
1116         kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1117 }
1118
1119 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1120 {
1121         struct dp_display_private *dp = dev_id;
1122         irqreturn_t ret = IRQ_HANDLED;
1123         u32 hpd_isr_status;
1124
1125         if (!dp) {
1126                 DRM_ERROR("invalid data\n");
1127                 return IRQ_NONE;
1128         }
1129
1130         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1131
1132         if (hpd_isr_status & 0x0F) {
1133                 /* hpd related interrupts */
1134                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1135                         hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1136                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1137                 }
1138
1139                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1140                         /* stop sentinel connect pending checking */
1141                         dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1142                         dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1143                 }
1144
1145                 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1146                         dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1147
1148                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1149                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1150         }
1151
1152         /* DP controller isr */
1153         dp_ctrl_isr(dp->ctrl);
1154
1155         /* DP aux isr */
1156         dp_aux_isr(dp->aux);
1157
1158         return ret;
1159 }
1160
1161 int dp_display_request_irq(struct msm_dp *dp_display)
1162 {
1163         int rc = 0;
1164         struct dp_display_private *dp;
1165
1166         if (!dp_display) {
1167                 DRM_ERROR("invalid input\n");
1168                 return -EINVAL;
1169         }
1170
1171         dp = container_of(dp_display, struct dp_display_private, dp_display);
1172
1173         dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1174         if (dp->irq < 0) {
1175                 rc = dp->irq;
1176                 DRM_ERROR("failed to get irq: %d\n", rc);
1177                 return rc;
1178         }
1179
1180         rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1181                         dp_display_irq_handler,
1182                         IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1183         if (rc < 0) {
1184                 DRM_ERROR("failed to request IRQ%u: %d\n",
1185                                 dp->irq, rc);
1186                 return rc;
1187         }
1188         disable_irq(dp->irq);
1189
1190         return 0;
1191 }
1192
1193 static int dp_display_probe(struct platform_device *pdev)
1194 {
1195         int rc = 0;
1196         struct dp_display_private *dp;
1197
1198         if (!pdev || !pdev->dev.of_node) {
1199                 DRM_ERROR("pdev not found\n");
1200                 return -ENODEV;
1201         }
1202
1203         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1204         if (!dp)
1205                 return -ENOMEM;
1206
1207         dp->pdev = pdev;
1208         dp->name = "drm_dp";
1209
1210         rc = dp_init_sub_modules(dp);
1211         if (rc) {
1212                 DRM_ERROR("init sub module failed\n");
1213                 return -EPROBE_DEFER;
1214         }
1215
1216         mutex_init(&dp->event_mutex);
1217         g_dp_display = &dp->dp_display;
1218
1219         /* Store DP audio handle inside DP display */
1220         g_dp_display->dp_audio = dp->audio;
1221
1222         init_completion(&dp->audio_comp);
1223
1224         platform_set_drvdata(pdev, g_dp_display);
1225
1226         rc = component_add(&pdev->dev, &dp_display_comp_ops);
1227         if (rc) {
1228                 DRM_ERROR("component add failed, rc=%d\n", rc);
1229                 dp_display_deinit_sub_modules(dp);
1230         }
1231
1232         return rc;
1233 }
1234
1235 static int dp_display_remove(struct platform_device *pdev)
1236 {
1237         struct dp_display_private *dp;
1238
1239         dp = container_of(g_dp_display,
1240                         struct dp_display_private, dp_display);
1241
1242         dp_display_deinit_sub_modules(dp);
1243
1244         component_del(&pdev->dev, &dp_display_comp_ops);
1245         platform_set_drvdata(pdev, NULL);
1246
1247         return 0;
1248 }
1249
1250 static int dp_pm_resume(struct device *dev)
1251 {
1252         struct platform_device *pdev = to_platform_device(dev);
1253         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1254         struct dp_display_private *dp;
1255         u32 status;
1256
1257         dp = container_of(dp_display, struct dp_display_private, dp_display);
1258
1259         mutex_lock(&dp->event_mutex);
1260
1261         /* start from disconnected state */
1262         dp->hpd_state = ST_DISCONNECTED;
1263
1264         /* turn on dp ctrl/phy */
1265         dp_display_host_init(dp, true);
1266
1267         dp_catalog_ctrl_hpd_config(dp->catalog);
1268
1269         status = dp_catalog_link_is_connected(dp->catalog);
1270
1271         /*
1272          * can not declared display is connected unless
1273          * HDMI cable is plugged in and sink_count of
1274          * dongle become 1
1275          */
1276         if (status && dp->link->sink_count)
1277                 dp->dp_display.is_connected = true;
1278         else
1279                 dp->dp_display.is_connected = false;
1280
1281         mutex_unlock(&dp->event_mutex);
1282
1283         return 0;
1284 }
1285
1286 static int dp_pm_suspend(struct device *dev)
1287 {
1288         struct platform_device *pdev = to_platform_device(dev);
1289         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1290         struct dp_display_private *dp;
1291
1292         dp = container_of(dp_display, struct dp_display_private, dp_display);
1293
1294         mutex_lock(&dp->event_mutex);
1295
1296         if (dp->core_initialized == true)
1297                 dp_display_host_deinit(dp);
1298
1299         dp->hpd_state = ST_SUSPENDED;
1300
1301         /* host_init will be called at pm_resume */
1302         dp->core_initialized = false;
1303
1304         mutex_unlock(&dp->event_mutex);
1305
1306         return 0;
1307 }
1308
1309 static int dp_pm_prepare(struct device *dev)
1310 {
1311         return 0;
1312 }
1313
1314 static void dp_pm_complete(struct device *dev)
1315 {
1316
1317 }
1318
1319 static const struct dev_pm_ops dp_pm_ops = {
1320         .suspend = dp_pm_suspend,
1321         .resume =  dp_pm_resume,
1322         .prepare = dp_pm_prepare,
1323         .complete = dp_pm_complete,
1324 };
1325
1326 static struct platform_driver dp_display_driver = {
1327         .probe  = dp_display_probe,
1328         .remove = dp_display_remove,
1329         .driver = {
1330                 .name = "msm-dp-display",
1331                 .of_match_table = dp_dt_match,
1332                 .suppress_bind_attrs = true,
1333                 .pm = &dp_pm_ops,
1334         },
1335 };
1336
1337 int __init msm_dp_register(void)
1338 {
1339         int ret;
1340
1341         ret = platform_driver_register(&dp_display_driver);
1342         if (ret)
1343                 DRM_ERROR("Dp display driver register failed");
1344
1345         return ret;
1346 }
1347
1348 void __exit msm_dp_unregister(void)
1349 {
1350         platform_driver_unregister(&dp_display_driver);
1351 }
1352
1353 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1354 {
1355         struct dp_display_private *dp;
1356
1357         if (!dp_display)
1358                 return;
1359
1360         dp = container_of(dp_display, struct dp_display_private, dp_display);
1361
1362         dp_hpd_event_setup(dp);
1363
1364         dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1365 }
1366
1367 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1368 {
1369         struct dp_display_private *dp;
1370         struct device *dev;
1371         int rc;
1372
1373         dp = container_of(dp_display, struct dp_display_private, dp_display);
1374         dev = &dp->pdev->dev;
1375
1376         dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1377                                         dp->link, &dp->dp_display.connector,
1378                                         minor);
1379         if (IS_ERR(dp->debug)) {
1380                 rc = PTR_ERR(dp->debug);
1381                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1382                 dp->debug = NULL;
1383         }
1384 }
1385
1386 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1387                         struct drm_encoder *encoder)
1388 {
1389         struct msm_drm_private *priv;
1390         int ret;
1391
1392         if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1393                 return -EINVAL;
1394
1395         priv = dev->dev_private;
1396         dp_display->drm_dev = dev;
1397
1398         ret = dp_display_request_irq(dp_display);
1399         if (ret) {
1400                 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1401                 return ret;
1402         }
1403
1404         dp_display->encoder = encoder;
1405
1406         dp_display->connector = dp_drm_connector_init(dp_display);
1407         if (IS_ERR(dp_display->connector)) {
1408                 ret = PTR_ERR(dp_display->connector);
1409                 DRM_DEV_ERROR(dev->dev,
1410                         "failed to create dp connector: %d\n", ret);
1411                 dp_display->connector = NULL;
1412                 return ret;
1413         }
1414
1415         priv->connectors[priv->num_connectors++] = dp_display->connector;
1416         return 0;
1417 }
1418
1419 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1420 {
1421         int rc = 0;
1422         struct dp_display_private *dp_display;
1423         u32 state;
1424
1425         dp_display = container_of(dp, struct dp_display_private, dp_display);
1426         if (!dp_display->dp_mode.drm_mode.clock) {
1427                 DRM_ERROR("invalid params\n");
1428                 return -EINVAL;
1429         }
1430
1431         mutex_lock(&dp_display->event_mutex);
1432
1433         /* stop sentinel checking */
1434         dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1435
1436         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1437         if (rc) {
1438                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1439                 mutex_unlock(&dp_display->event_mutex);
1440                 return rc;
1441         }
1442
1443         rc = dp_display_prepare(dp);
1444         if (rc) {
1445                 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1446                 mutex_unlock(&dp_display->event_mutex);
1447                 return rc;
1448         }
1449
1450         state =  dp_display->hpd_state;
1451
1452         if (state == ST_DISPLAY_OFF)
1453                 dp_display_host_init(dp_display, true);
1454
1455         dp_display_enable(dp_display, 0);
1456
1457         rc = dp_display_post_enable(dp);
1458         if (rc) {
1459                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1460                 dp_display_disable(dp_display, 0);
1461                 dp_display_unprepare(dp);
1462         }
1463
1464         /* manual kick off plug event to train link */
1465         if (state == ST_DISPLAY_OFF)
1466                 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1467
1468         /* completed connection */
1469         dp_display->hpd_state = ST_CONNECTED;
1470
1471         mutex_unlock(&dp_display->event_mutex);
1472
1473         return rc;
1474 }
1475
1476 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1477 {
1478         struct dp_display_private *dp_display;
1479
1480         dp_display = container_of(dp, struct dp_display_private, dp_display);
1481
1482         dp_ctrl_push_idle(dp_display->ctrl);
1483
1484         return 0;
1485 }
1486
1487 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1488 {
1489         int rc = 0;
1490         u32 state;
1491         struct dp_display_private *dp_display;
1492
1493         dp_display = container_of(dp, struct dp_display_private, dp_display);
1494
1495         mutex_lock(&dp_display->event_mutex);
1496
1497         /* stop sentinel checking */
1498         dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1499
1500         dp_display_disable(dp_display, 0);
1501
1502         rc = dp_display_unprepare(dp);
1503         if (rc)
1504                 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1505
1506         state =  dp_display->hpd_state;
1507         if (state == ST_DISCONNECT_PENDING) {
1508                 /* completed disconnection */
1509                 dp_display->hpd_state = ST_DISCONNECTED;
1510         } else {
1511                 dp_display->hpd_state = ST_DISPLAY_OFF;
1512         }
1513
1514         mutex_unlock(&dp_display->event_mutex);
1515         return rc;
1516 }
1517
1518 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1519                                 struct drm_display_mode *mode,
1520                                 struct drm_display_mode *adjusted_mode)
1521 {
1522         struct dp_display_private *dp_display;
1523
1524         dp_display = container_of(dp, struct dp_display_private, dp_display);
1525
1526         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1527
1528         if (dp_display_check_video_test(dp))
1529                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1530         else /* Default num_components per pixel = 3 */
1531                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1532
1533         if (!dp_display->dp_mode.bpp)
1534                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1535
1536         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1537
1538         dp_display->dp_mode.v_active_low =
1539                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1540
1541         dp_display->dp_mode.h_active_low =
1542                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1543 }