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_start(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         reinit_completion(&dp->audio_comp);
 188 }
 189
 190 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
 191 {
 192         struct dp_display_private *dp;
 193
 194         dp = container_of(dp_display, struct dp_display_private, dp_display);
 195
 196         complete_all(&dp->audio_comp);
 197 }
 198
 199 static int dp_display_bind(struct device *dev, struct device *master,
 200                            void *data)
 201 {
 202         int rc = 0;
 203         struct dp_display_private *dp;
 204         struct drm_device *drm;
 205         struct msm_drm_private *priv;
 206
 207         drm = dev_get_drvdata(master);
 208
 209         dp = container_of(g_dp_display,
 210                         struct dp_display_private, dp_display);
 211         if (!dp) {
 212                 DRM_ERROR("DP driver bind failed. Invalid driver data\n");
 213                 return -EINVAL;
 214         }
 215
 216         dp->dp_display.drm_dev = drm;
 217         priv = drm->dev_private;
 218         priv->dp = &(dp->dp_display);
 219
 220         rc = dp->parser->parse(dp->parser);
 221         if (rc) {
 222                 DRM_ERROR("device tree parsing failed\n");
 223                 goto end;
 224         }
 225
 226         rc = dp_aux_register(dp->aux);
 227         if (rc) {
 228                 DRM_ERROR("DRM DP AUX register failed\n");
 229                 goto end;
 230         }
 231
 232         rc = dp_power_client_init(dp->power);
 233         if (rc) {
 234                 DRM_ERROR("Power client create failed\n");
 235                 goto end;
 236         }
 237
 238         rc = dp_register_audio_driver(dev, dp->audio);
 239         if (rc)
 240                 DRM_ERROR("Audio registration Dp failed\n");
 241
 242 end:
 243         return rc;
 244 }
 245
 246 static void dp_display_unbind(struct device *dev, struct device *master,
 247                               void *data)
 248 {
 249         struct dp_display_private *dp;
 250         struct drm_device *drm = dev_get_drvdata(master);
 251         struct msm_drm_private *priv = drm->dev_private;
 252
 253         dp = container_of(g_dp_display,
 254                         struct dp_display_private, dp_display);
 255         if (!dp) {
 256                 DRM_ERROR("Invalid DP driver data\n");
 257                 return;
 258         }
 259
 260         dp_power_client_deinit(dp->power);
 261         dp_aux_unregister(dp->aux);
 262         priv->dp = NULL;
 263 }
 264
 265 static const struct component_ops dp_display_comp_ops = {
 266         .bind = dp_display_bind,
 267         .unbind = dp_display_unbind,
 268 };
 269
 270 static bool dp_display_is_ds_bridge(struct dp_panel *panel)
 271 {
 272         return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
 273                 DP_DWN_STRM_PORT_PRESENT);
 274 }
 275
 276 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
 277 {
 278         return dp_display_is_ds_bridge(dp->panel) &&
 279                 (dp->link->sink_count == 0);
 280 }
 281
 282 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
 283 {
 284         struct dp_display_private *dp;
 285         struct drm_connector *connector;
 286
 287         dp = container_of(dp_display, struct dp_display_private, dp_display);
 288
 289         connector = dp->dp_display.connector;
 290         drm_helper_hpd_irq_event(connector->dev);
 291 }
 292
 293
 294 static void dp_display_set_encoder_mode(struct dp_display_private *dp)
 295 {
 296         struct msm_drm_private *priv = dp->dp_display.drm_dev->dev_private;
 297         struct msm_kms *kms = priv->kms;
 298
 299         if (!dp->encoder_mode_set && dp->dp_display.encoder &&
 300                                 kms->funcs->set_encoder_mode) {
 301                 kms->funcs->set_encoder_mode(kms,
 302                                 dp->dp_display.encoder, false);
 303
 304                 dp->encoder_mode_set = true;
 305         }
 306 }
 307
 308 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 309                                             bool hpd)
 310 {
 311         if ((hpd && dp->dp_display.is_connected) ||
 312                         (!hpd && !dp->dp_display.is_connected)) {
 313                 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
 314                 return 0;
 315         }
 316
 317         /* reset video pattern flag on disconnect */
 318         if (!hpd)
 319                 dp->panel->video_test = false;
 320
 321         dp->dp_display.is_connected = hpd;
 322
 323         dp_display_send_hpd_event(&dp->dp_display);
 324
 325         return 0;
 326 }
 327
 328 static int dp_display_process_hpd_high(struct dp_display_private *dp)
 329 {
 330         int rc = 0;
 331         struct edid *edid;
 332
 333         dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
 334
 335         rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
 336         if (rc)
 337                 goto end;
 338
 339         dp_link_process_request(dp->link);
 340
 341         edid = dp->panel->edid;
 342
 343         dp->audio_supported = drm_detect_monitor_audio(edid);
 344         dp_panel_handle_sink_request(dp->panel);
 345
 346         dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
 347         dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
 348
 349         dp_link_reset_phy_params_vx_px(dp->link);
 350         rc = dp_ctrl_on_link(dp->ctrl);
 351         if (rc) {
 352                 DRM_ERROR("failed to complete DP link training\n");
 353                 goto end;
 354         }
 355
 356         dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
 357
 358 end:
 359         return rc;
 360 }
 361
 362 static void dp_display_host_init(struct dp_display_private *dp, int reset)
 363 {
 364         bool flip = false;
 365
 366         if (dp->core_initialized) {
 367                 DRM_DEBUG_DP("DP core already initialized\n");
 368                 return;
 369         }
 370
 371         if (dp->usbpd->orientation == ORIENTATION_CC2)
 372                 flip = true;
 373
 374         dp_display_set_encoder_mode(dp);
 375
 376         dp_power_init(dp->power, flip);
 377         dp_ctrl_host_init(dp->ctrl, flip, reset);
 378         dp_aux_init(dp->aux);
 379         dp->core_initialized = true;
 380 }
 381
 382 static void dp_display_host_deinit(struct dp_display_private *dp)
 383 {
 384         if (!dp->core_initialized) {
 385                 DRM_DEBUG_DP("DP core not initialized\n");
 386                 return;
 387         }
 388
 389         dp_ctrl_host_deinit(dp->ctrl);
 390         dp_aux_deinit(dp->aux);
 391         dp_power_deinit(dp->power);
 392
 393         dp->core_initialized = false;
 394 }
 395
 396 static int dp_display_usbpd_configure_cb(struct device *dev)
 397 {
 398         int rc = 0;
 399         struct dp_display_private *dp;
 400
 401         if (!dev) {
 402                 DRM_ERROR("invalid dev\n");
 403                 rc = -EINVAL;
 404                 goto end;
 405         }
 406
 407         dp = container_of(g_dp_display,
 408                         struct dp_display_private, dp_display);
 409         if (!dp) {
 410                 DRM_ERROR("no driver data found\n");
 411                 rc = -ENODEV;
 412                 goto end;
 413         }
 414
 415         dp_display_host_init(dp, false);
 416
 417         /*
 418          * set sink to normal operation mode -- D0
 419          * before dpcd read
 420          */
 421         dp_link_psm_config(dp->link, &dp->panel->link_info, false);
 422         rc = dp_display_process_hpd_high(dp);
 423 end:
 424         return rc;
 425 }
 426
 427 static int dp_display_usbpd_disconnect_cb(struct device *dev)
 428 {
 429         int rc = 0;
 430         struct dp_display_private *dp;
 431
 432         if (!dev) {
 433                 DRM_ERROR("invalid dev\n");
 434                 rc = -EINVAL;
 435                 return rc;
 436         }
 437
 438         dp = container_of(g_dp_display,
 439                         struct dp_display_private, dp_display);
 440         if (!dp) {
 441                 DRM_ERROR("no driver data found\n");
 442                 rc = -ENODEV;
 443                 return rc;
 444         }
 445
 446         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 447
 448         return rc;
 449 }
 450
 451 static void dp_display_handle_video_request(struct dp_display_private *dp)
 452 {
 453         if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
 454                 dp->panel->video_test = true;
 455                 dp_link_send_test_response(dp->link);
 456         }
 457 }
 458
 459 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
 460 {
 461         int rc = 0;
 462
 463         if (dp_display_is_sink_count_zero(dp)) {
 464                 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
 465                 if (dp->hpd_state != ST_DISCONNECTED) {
 466                         dp->hpd_state = ST_DISCONNECT_PENDING;
 467                         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 468                 }
 469         } else {
 470                 if (dp->hpd_state == ST_DISCONNECTED) {
 471                         dp->hpd_state = ST_CONNECT_PENDING;
 472                         rc = dp_display_process_hpd_high(dp);
 473                         if (rc)
 474                                 dp->hpd_state = ST_DISCONNECTED;
 475                 }
 476         }
 477
 478         return rc;
 479 }
 480
 481 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
 482 {
 483         u32 sink_request = dp->link->sink_request;
 484
 485         if (dp->hpd_state == ST_DISCONNECTED) {
 486                 if (sink_request & DP_LINK_STATUS_UPDATED) {
 487                         DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
 488                         return -EINVAL;
 489                 }
 490         }
 491
 492         dp_ctrl_handle_sink_request(dp->ctrl);
 493
 494         if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
 495                 dp_display_handle_video_request(dp);
 496
 497         return 0;
 498 }
 499
 500 static int dp_display_usbpd_attention_cb(struct device *dev)
 501 {
 502         int rc = 0;
 503         u32 sink_request;
 504         struct dp_display_private *dp;
 505         struct dp_usbpd *hpd;
 506
 507         if (!dev) {
 508                 DRM_ERROR("invalid dev\n");
 509                 return -EINVAL;
 510         }
 511
 512         dp = container_of(g_dp_display,
 513                         struct dp_display_private, dp_display);
 514         if (!dp) {
 515                 DRM_ERROR("no driver data found\n");
 516                 return -ENODEV;
 517         }
 518
 519         hpd = dp->usbpd;
 520
 521         /* check for any test request issued by sink */
 522         rc = dp_link_process_request(dp->link);
 523         if (!rc) {
 524                 sink_request = dp->link->sink_request;
 525                 if (sink_request & DS_PORT_STATUS_CHANGED)
 526                         rc = dp_display_handle_port_ststus_changed(dp);
 527                 else
 528                         rc = dp_display_handle_irq_hpd(dp);
 529         }
 530
 531         return rc;
 532 }
 533
 534 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 535 {
 536         struct dp_usbpd *hpd = dp->usbpd;
 537         u32 state;
 538         u32 tout = DP_TIMEOUT_5_SECOND;
 539         int ret;
 540
 541         if (!hpd)
 542                 return 0;
 543
 544         mutex_lock(&dp->event_mutex);
 545
 546         state =  dp->hpd_state;
 547         if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
 548                 mutex_unlock(&dp->event_mutex);
 549                 return 0;
 550         }
 551
 552         if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
 553                 mutex_unlock(&dp->event_mutex);
 554                 return 0;
 555         }
 556
 557         if (state == ST_DISCONNECT_PENDING) {
 558                 /* wait until ST_DISCONNECTED */
 559                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
 560                 mutex_unlock(&dp->event_mutex);
 561                 return 0;
 562         }
 563
 564         dp->hpd_state = ST_CONNECT_PENDING;
 565
 566         hpd->hpd_high = 1;
 567
 568         ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
 569         if (ret) {      /* link train failed */
 570                 hpd->hpd_high = 0;
 571                 dp->hpd_state = ST_DISCONNECTED;
 572
 573                 if (ret == -ECONNRESET) { /* cable unplugged */
 574                         dp->core_initialized = false;
 575                 }
 576
 577         } else {
 578                 /* start sentinel checking in case of missing uevent */
 579                 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
 580         }
 581
 582         mutex_unlock(&dp->event_mutex);
 583
 584         /* uevent will complete connection part */
 585         return 0;
 586 };
 587
 588 static int dp_display_enable(struct dp_display_private *dp, u32 data);
 589 static int dp_display_disable(struct dp_display_private *dp, u32 data);
 590
 591 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
 592 {
 593         u32 state;
 594
 595         mutex_lock(&dp->event_mutex);
 596
 597         state = dp->hpd_state;
 598         if (state == ST_CONNECT_PENDING)
 599                 dp->hpd_state = ST_CONNECTED;
 600
 601         mutex_unlock(&dp->event_mutex);
 602
 603         return 0;
 604 }
 605
 606 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 607                 bool plugged)
 608 {
 609         struct dp_display_private *dp;
 610
 611         dp = container_of(dp_display,
 612                         struct dp_display_private, dp_display);
 613
 614         /* notify audio subsystem only if sink supports audio */
 615         if (dp_display->plugged_cb && dp_display->codec_dev &&
 616                         dp->audio_supported)
 617                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 618 }
 619
 620 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 621 {
 622         struct dp_usbpd *hpd = dp->usbpd;
 623         u32 state;
 624
 625         if (!hpd)
 626                 return 0;
 627
 628         mutex_lock(&dp->event_mutex);
 629
 630         state = dp->hpd_state;
 631         if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) {
 632                 mutex_unlock(&dp->event_mutex);
 633                 return 0;
 634         }
 635
 636         if (state == ST_CONNECT_PENDING) {
 637                 /* wait until CONNECTED */
 638                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
 639                 mutex_unlock(&dp->event_mutex);
 640                 return 0;
 641         }
 642
 643         dp->hpd_state = ST_DISCONNECT_PENDING;
 644
 645         /* disable HPD plug interrupt until disconnect is done */
 646         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK
 647                                 | DP_DP_IRQ_HPD_INT_MASK, false);
 648
 649         hpd->hpd_high = 0;
 650
 651         /*
 652          * We don't need separate work for disconnect as
 653          * connect/attention interrupts are disabled
 654          */
 655         dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
 656
 657         /* start sentinel checking in case of missing uevent */
 658         dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
 659
 660         /* signal the disconnect event early to ensure proper teardown */
 661         dp_display_handle_plugged_change(g_dp_display, false);
 662
 663         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK |
 664                                         DP_DP_IRQ_HPD_INT_MASK, true);
 665
 666         /* uevent will complete disconnection part */
 667         mutex_unlock(&dp->event_mutex);
 668         return 0;
 669 }
 670
 671 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
 672 {
 673         u32 state;
 674
 675         mutex_lock(&dp->event_mutex);
 676
 677         state =  dp->hpd_state;
 678         if (state == ST_DISCONNECT_PENDING)
 679                 dp->hpd_state = ST_DISCONNECTED;
 680
 681         mutex_unlock(&dp->event_mutex);
 682
 683         return 0;
 684 }
 685
 686 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 687 {
 688         u32 state;
 689         int ret;
 690
 691         mutex_lock(&dp->event_mutex);
 692
 693         /* irq_hpd can happen at either connected or disconnected state */
 694         state =  dp->hpd_state;
 695         if (state == ST_DISPLAY_OFF) {
 696                 mutex_unlock(&dp->event_mutex);
 697                 return 0;
 698         }
 699
 700         if (state == ST_CONNECT_PENDING) {
 701                 /* wait until ST_CONNECTED */
 702                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 703                 mutex_unlock(&dp->event_mutex);
 704                 return 0;
 705         }
 706
 707         if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
 708                 /* wait until ST_CONNECTED */
 709                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 710                 mutex_unlock(&dp->event_mutex);
 711                 return 0;
 712         }
 713
 714         ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
 715         if (ret == -ECONNRESET) { /* cable unplugged */
 716                 dp->core_initialized = false;
 717         }
 718
 719         mutex_unlock(&dp->event_mutex);
 720
 721         return 0;
 722 }
 723
 724 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 725 {
 726         dp_debug_put(dp->debug);
 727         dp_ctrl_put(dp->ctrl);
 728         dp_panel_put(dp->panel);
 729         dp_aux_put(dp->aux);
 730         dp_audio_put(dp->audio);
 731 }
 732
 733 static int dp_init_sub_modules(struct dp_display_private *dp)
 734 {
 735         int rc = 0;
 736         struct device *dev = &dp->pdev->dev;
 737         struct dp_usbpd_cb *cb = &dp->usbpd_cb;
 738         struct dp_panel_in panel_in = {
 739                 .dev = dev,
 740         };
 741
 742         /* Callback APIs used for cable status change event */
 743         cb->configure  = dp_display_usbpd_configure_cb;
 744         cb->disconnect = dp_display_usbpd_disconnect_cb;
 745         cb->attention  = dp_display_usbpd_attention_cb;
 746
 747         dp->usbpd = dp_hpd_get(dev, cb);
 748         if (IS_ERR(dp->usbpd)) {
 749                 rc = PTR_ERR(dp->usbpd);
 750                 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
 751                 dp->usbpd = NULL;
 752                 goto error;
 753         }
 754
 755         dp->parser = dp_parser_get(dp->pdev);
 756         if (IS_ERR(dp->parser)) {
 757                 rc = PTR_ERR(dp->parser);
 758                 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
 759                 dp->parser = NULL;
 760                 goto error;
 761         }
 762
 763         dp->catalog = dp_catalog_get(dev, &dp->parser->io);
 764         if (IS_ERR(dp->catalog)) {
 765                 rc = PTR_ERR(dp->catalog);
 766                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 767                 dp->catalog = NULL;
 768                 goto error;
 769         }
 770
 771         dp->power = dp_power_get(dev, dp->parser);
 772         if (IS_ERR(dp->power)) {
 773                 rc = PTR_ERR(dp->power);
 774                 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
 775                 dp->power = NULL;
 776                 goto error;
 777         }
 778
 779         dp->aux = dp_aux_get(dev, dp->catalog);
 780         if (IS_ERR(dp->aux)) {
 781                 rc = PTR_ERR(dp->aux);
 782                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 783                 dp->aux = NULL;
 784                 goto error;
 785         }
 786
 787         dp->link = dp_link_get(dev, dp->aux);
 788         if (IS_ERR(dp->link)) {
 789                 rc = PTR_ERR(dp->link);
 790                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 791                 dp->link = NULL;
 792                 goto error_link;
 793         }
 794
 795         panel_in.aux = dp->aux;
 796         panel_in.catalog = dp->catalog;
 797         panel_in.link = dp->link;
 798
 799         dp->panel = dp_panel_get(&panel_in);
 800         if (IS_ERR(dp->panel)) {
 801                 rc = PTR_ERR(dp->panel);
 802                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 803                 dp->panel = NULL;
 804                 goto error_link;
 805         }
 806
 807         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 808                                dp->power, dp->catalog, dp->parser);
 809         if (IS_ERR(dp->ctrl)) {
 810                 rc = PTR_ERR(dp->ctrl);
 811                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 812                 dp->ctrl = NULL;
 813                 goto error_ctrl;
 814         }
 815
 816         dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
 817         if (IS_ERR(dp->audio)) {
 818                 rc = PTR_ERR(dp->audio);
 819                 pr_err("failed to initialize audio, rc = %d\n", rc);
 820                 dp->audio = NULL;
 821                 goto error_audio;
 822         }
 823
 824         return rc;
 825
 826 error_audio:
 827         dp_ctrl_put(dp->ctrl);
 828 error_ctrl:
 829         dp_panel_put(dp->panel);
 830 error_link:
 831         dp_aux_put(dp->aux);
 832 error:
 833         return rc;
 834 }
 835
 836 static int dp_display_set_mode(struct msm_dp *dp_display,
 837                                struct dp_display_mode *mode)
 838 {
 839         struct dp_display_private *dp;
 840
 841         dp = container_of(dp_display, struct dp_display_private, dp_display);
 842
 843         dp->panel->dp_mode.drm_mode = mode->drm_mode;
 844         dp->panel->dp_mode.bpp = mode->bpp;
 845         dp->panel->dp_mode.capabilities = mode->capabilities;
 846         dp_panel_init_panel_info(dp->panel);
 847         return 0;
 848 }
 849
 850 static int dp_display_prepare(struct msm_dp *dp)
 851 {
 852         return 0;
 853 }
 854
 855 static int dp_display_enable(struct dp_display_private *dp, u32 data)
 856 {
 857         int rc = 0;
 858         struct msm_dp *dp_display;
 859
 860         dp_display = g_dp_display;
 861
 862         if (dp_display->power_on) {
 863                 DRM_DEBUG_DP("Link already setup, return\n");
 864                 return 0;
 865         }
 866
 867         rc = dp_ctrl_on_stream(dp->ctrl);
 868         if (!rc)
 869                 dp_display->power_on = true;
 870
 871         return rc;
 872 }
 873
 874 static int dp_display_post_enable(struct msm_dp *dp_display)
 875 {
 876         struct dp_display_private *dp;
 877         u32 rate;
 878
 879         dp = container_of(dp_display, struct dp_display_private, dp_display);
 880
 881         rate = dp->link->link_params.rate;
 882
 883         if (dp->audio_supported) {
 884                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 885                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 886         }
 887
 888         /* signal the connect event late to synchronize video and display */
 889         dp_display_handle_plugged_change(dp_display, true);
 890         return 0;
 891 }
 892
 893 static int dp_display_disable(struct dp_display_private *dp, u32 data)
 894 {
 895         struct msm_dp *dp_display;
 896
 897         dp_display = g_dp_display;
 898
 899         if (!dp_display->power_on)
 900                 return 0;
 901
 902         /* wait only if audio was enabled */
 903         if (dp_display->audio_enabled) {
 904                 /* signal the disconnect event */
 905                 dp_display_handle_plugged_change(dp_display, false);
 906                 if (!wait_for_completion_timeout(&dp->audio_comp,
 907                                 HZ * 5))
 908                         DRM_ERROR("audio comp timeout\n");
 909         }
 910
 911         dp_display->audio_enabled = false;
 912
 913         dp_ctrl_off(dp->ctrl);
 914
 915         dp->core_initialized = false;
 916
 917         dp_display->power_on = false;
 918
 919         return 0;
 920 }
 921
 922 static int dp_display_unprepare(struct msm_dp *dp)
 923 {
 924         return 0;
 925 }
 926
 927 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 928                 hdmi_codec_plugged_cb fn, struct device *codec_dev)
 929 {
 930         bool plugged;
 931
 932         dp_display->plugged_cb = fn;
 933         dp_display->codec_dev = codec_dev;
 934         plugged = dp_display->is_connected;
 935         dp_display_handle_plugged_change(dp_display, plugged);
 936
 937         return 0;
 938 }
 939
 940 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
 941 {
 942         const u32 num_components = 3, default_bpp = 24;
 943         struct dp_display_private *dp_display;
 944         struct dp_link_info *link_info;
 945         u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
 946
 947         if (!dp || !mode_pclk_khz || !dp->connector) {
 948                 DRM_ERROR("invalid params\n");
 949                 return -EINVAL;
 950         }
 951
 952         dp_display = container_of(dp, struct dp_display_private, dp_display);
 953         link_info = &dp_display->panel->link_info;
 954
 955         mode_bpp = dp->connector->display_info.bpc * num_components;
 956         if (!mode_bpp)
 957                 mode_bpp = default_bpp;
 958
 959         mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
 960                         mode_bpp, mode_pclk_khz);
 961
 962         mode_rate_khz = mode_pclk_khz * mode_bpp;
 963         supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
 964
 965         if (mode_rate_khz > supported_rate_khz)
 966                 return MODE_BAD;
 967
 968         return MODE_OK;
 969 }
 970
 971 int dp_display_get_modes(struct msm_dp *dp,
 972                                 struct dp_display_mode *dp_mode)
 973 {
 974         struct dp_display_private *dp_display;
 975         int ret = 0;
 976
 977         if (!dp) {
 978                 DRM_ERROR("invalid params\n");
 979                 return 0;
 980         }
 981
 982         dp_display = container_of(dp, struct dp_display_private, dp_display);
 983
 984         ret = dp_panel_get_modes(dp_display->panel,
 985                 dp->connector, dp_mode);
 986         if (dp_mode->drm_mode.clock)
 987                 dp->max_pclk_khz = dp_mode->drm_mode.clock;
 988         return ret;
 989 }
 990
 991 bool dp_display_check_video_test(struct msm_dp *dp)
 992 {
 993         struct dp_display_private *dp_display;
 994
 995         dp_display = container_of(dp, struct dp_display_private, dp_display);
 996
 997         return dp_display->panel->video_test;
 998 }
 999
1000 int dp_display_get_test_bpp(struct msm_dp *dp)
1001 {
1002         struct dp_display_private *dp_display;
1003
1004         if (!dp) {
1005                 DRM_ERROR("invalid params\n");
1006                 return 0;
1007         }
1008
1009         dp_display = container_of(dp, struct dp_display_private, dp_display);
1010
1011         return dp_link_bit_depth_to_bpp(
1012                 dp_display->link->test_video.test_bit_depth);
1013 }
1014
1015 static void dp_display_config_hpd(struct dp_display_private *dp)
1016 {
1017
1018         dp_display_host_init(dp, true);
1019         dp_catalog_ctrl_hpd_config(dp->catalog);
1020
1021         /* Enable interrupt first time
1022          * we are leaving dp clocks on during disconnect
1023          * and never disable interrupt
1024          */
1025         enable_irq(dp->irq);
1026 }
1027
1028 static int hpd_event_thread(void *data)
1029 {
1030         struct dp_display_private *dp_priv;
1031         unsigned long flag;
1032         struct dp_event *todo;
1033         int timeout_mode = 0;
1034
1035         dp_priv = (struct dp_display_private *)data;
1036
1037         while (1) {
1038                 if (timeout_mode) {
1039                         wait_event_timeout(dp_priv->event_q,
1040                                 (dp_priv->event_pndx == dp_priv->event_gndx),
1041                                                 EVENT_TIMEOUT);
1042                 } else {
1043                         wait_event_interruptible(dp_priv->event_q,
1044                                 (dp_priv->event_pndx != dp_priv->event_gndx));
1045                 }
1046                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1047                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1048                 if (todo->delay) {
1049                         struct dp_event *todo_next;
1050
1051                         dp_priv->event_gndx++;
1052                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1053
1054                         /* re enter delay event into q */
1055                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1056                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1057                         todo_next->event_id = todo->event_id;
1058                         todo_next->data = todo->data;
1059                         todo_next->delay = todo->delay - 1;
1060
1061                         /* clean up older event */
1062                         todo->event_id = EV_NO_EVENT;
1063                         todo->delay = 0;
1064
1065                         /* switch to timeout mode */
1066                         timeout_mode = 1;
1067                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1068                         continue;
1069                 }
1070
1071                 /* timeout with no events in q */
1072                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1073                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1074                         continue;
1075                 }
1076
1077                 dp_priv->event_gndx++;
1078                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1079                 timeout_mode = 0;
1080                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1081
1082                 switch (todo->event_id) {
1083                 case EV_HPD_INIT_SETUP:
1084                         dp_display_config_hpd(dp_priv);
1085                         break;
1086                 case EV_HPD_PLUG_INT:
1087                         dp_hpd_plug_handle(dp_priv, todo->data);
1088                         break;
1089                 case EV_HPD_UNPLUG_INT:
1090                         dp_hpd_unplug_handle(dp_priv, todo->data);
1091                         break;
1092                 case EV_IRQ_HPD_INT:
1093                         dp_irq_hpd_handle(dp_priv, todo->data);
1094                         break;
1095                 case EV_HPD_REPLUG_INT:
1096                         /* do nothing */
1097                         break;
1098                 case EV_USER_NOTIFICATION:
1099                         dp_display_send_hpd_notification(dp_priv,
1100                                                 todo->data);
1101                         break;
1102                 case EV_CONNECT_PENDING_TIMEOUT:
1103                         dp_connect_pending_timeout(dp_priv,
1104                                                 todo->data);
1105                         break;
1106                 case EV_DISCONNECT_PENDING_TIMEOUT:
1107                         dp_disconnect_pending_timeout(dp_priv,
1108                                                 todo->data);
1109                         break;
1110                 default:
1111                         break;
1112                 }
1113         }
1114
1115         return 0;
1116 }
1117
1118 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1119 {
1120         init_waitqueue_head(&dp_priv->event_q);
1121         spin_lock_init(&dp_priv->event_lock);
1122
1123         kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1124 }
1125
1126 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1127 {
1128         struct dp_display_private *dp = dev_id;
1129         irqreturn_t ret = IRQ_HANDLED;
1130         u32 hpd_isr_status;
1131
1132         if (!dp) {
1133                 DRM_ERROR("invalid data\n");
1134                 return IRQ_NONE;
1135         }
1136
1137         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1138
1139         if (hpd_isr_status & 0x0F) {
1140                 /* hpd related interrupts */
1141                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||
1142                         hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1143                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1144                 }
1145
1146                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1147                         /* stop sentinel connect pending checking */
1148                         dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1149                         dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1150                 }
1151
1152                 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)
1153                         dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);
1154
1155                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1156                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1157         }
1158
1159         /* DP controller isr */
1160         dp_ctrl_isr(dp->ctrl);
1161
1162         /* DP aux isr */
1163         dp_aux_isr(dp->aux);
1164
1165         return ret;
1166 }
1167
1168 int dp_display_request_irq(struct msm_dp *dp_display)
1169 {
1170         int rc = 0;
1171         struct dp_display_private *dp;
1172
1173         if (!dp_display) {
1174                 DRM_ERROR("invalid input\n");
1175                 return -EINVAL;
1176         }
1177
1178         dp = container_of(dp_display, struct dp_display_private, dp_display);
1179
1180         dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1181         if (dp->irq < 0) {
1182                 rc = dp->irq;
1183                 DRM_ERROR("failed to get irq: %d\n", rc);
1184                 return rc;
1185         }
1186
1187         rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1188                         dp_display_irq_handler,
1189                         IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1190         if (rc < 0) {
1191                 DRM_ERROR("failed to request IRQ%u: %d\n",
1192                                 dp->irq, rc);
1193                 return rc;
1194         }
1195         disable_irq(dp->irq);
1196
1197         return 0;
1198 }
1199
1200 static int dp_display_probe(struct platform_device *pdev)
1201 {
1202         int rc = 0;
1203         struct dp_display_private *dp;
1204
1205         if (!pdev || !pdev->dev.of_node) {
1206                 DRM_ERROR("pdev not found\n");
1207                 return -ENODEV;
1208         }
1209
1210         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1211         if (!dp)
1212                 return -ENOMEM;
1213
1214         dp->pdev = pdev;
1215         dp->name = "drm_dp";
1216
1217         rc = dp_init_sub_modules(dp);
1218         if (rc) {
1219                 DRM_ERROR("init sub module failed\n");
1220                 return -EPROBE_DEFER;
1221         }
1222
1223         mutex_init(&dp->event_mutex);
1224         g_dp_display = &dp->dp_display;
1225
1226         /* Store DP audio handle inside DP display */
1227         g_dp_display->dp_audio = dp->audio;
1228
1229         init_completion(&dp->audio_comp);
1230
1231         platform_set_drvdata(pdev, g_dp_display);
1232
1233         rc = component_add(&pdev->dev, &dp_display_comp_ops);
1234         if (rc) {
1235                 DRM_ERROR("component add failed, rc=%d\n", rc);
1236                 dp_display_deinit_sub_modules(dp);
1237         }
1238
1239         return rc;
1240 }
1241
1242 static int dp_display_remove(struct platform_device *pdev)
1243 {
1244         struct dp_display_private *dp;
1245
1246         dp = container_of(g_dp_display,
1247                         struct dp_display_private, dp_display);
1248
1249         dp_display_deinit_sub_modules(dp);
1250
1251         component_del(&pdev->dev, &dp_display_comp_ops);
1252         platform_set_drvdata(pdev, NULL);
1253
1254         return 0;
1255 }
1256
1257 static int dp_pm_resume(struct device *dev)
1258 {
1259         struct platform_device *pdev = to_platform_device(dev);
1260         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1261         struct dp_display_private *dp;
1262         u32 status;
1263
1264         dp = container_of(dp_display, struct dp_display_private, dp_display);
1265
1266         mutex_lock(&dp->event_mutex);
1267
1268         /* start from disconnected state */
1269         dp->hpd_state = ST_DISCONNECTED;
1270
1271         /* turn on dp ctrl/phy */
1272         dp_display_host_init(dp, true);
1273
1274         dp_catalog_ctrl_hpd_config(dp->catalog);
1275
1276         status = dp_catalog_link_is_connected(dp->catalog);
1277
1278         /*
1279          * can not declared display is connected unless
1280          * HDMI cable is plugged in and sink_count of
1281          * dongle become 1
1282          */
1283         if (status && dp->link->sink_count)
1284                 dp->dp_display.is_connected = true;
1285         else
1286                 dp->dp_display.is_connected = false;
1287
1288         mutex_unlock(&dp->event_mutex);
1289
1290         return 0;
1291 }
1292
1293 static int dp_pm_suspend(struct device *dev)
1294 {
1295         struct platform_device *pdev = to_platform_device(dev);
1296         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1297         struct dp_display_private *dp;
1298
1299         dp = container_of(dp_display, struct dp_display_private, dp_display);
1300
1301         mutex_lock(&dp->event_mutex);
1302
1303         if (dp->core_initialized == true)
1304                 dp_display_host_deinit(dp);
1305
1306         dp->hpd_state = ST_SUSPENDED;
1307
1308         /* host_init will be called at pm_resume */
1309         dp->core_initialized = false;
1310
1311         mutex_unlock(&dp->event_mutex);
1312
1313         return 0;
1314 }
1315
1316 static int dp_pm_prepare(struct device *dev)
1317 {
1318         return 0;
1319 }
1320
1321 static void dp_pm_complete(struct device *dev)
1322 {
1323
1324 }
1325
1326 static const struct dev_pm_ops dp_pm_ops = {
1327         .suspend = dp_pm_suspend,
1328         .resume =  dp_pm_resume,
1329         .prepare = dp_pm_prepare,
1330         .complete = dp_pm_complete,
1331 };
1332
1333 static struct platform_driver dp_display_driver = {
1334         .probe  = dp_display_probe,
1335         .remove = dp_display_remove,
1336         .driver = {
1337                 .name = "msm-dp-display",
1338                 .of_match_table = dp_dt_match,
1339                 .suppress_bind_attrs = true,
1340                 .pm = &dp_pm_ops,
1341         },
1342 };
1343
1344 int __init msm_dp_register(void)
1345 {
1346         int ret;
1347
1348         ret = platform_driver_register(&dp_display_driver);
1349         if (ret)
1350                 DRM_ERROR("Dp display driver register failed");
1351
1352         return ret;
1353 }
1354
1355 void __exit msm_dp_unregister(void)
1356 {
1357         platform_driver_unregister(&dp_display_driver);
1358 }
1359
1360 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1361 {
1362         struct dp_display_private *dp;
1363
1364         if (!dp_display)
1365                 return;
1366
1367         dp = container_of(dp_display, struct dp_display_private, dp_display);
1368
1369         dp_hpd_event_setup(dp);
1370
1371         dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1372 }
1373
1374 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1375 {
1376         struct dp_display_private *dp;
1377         struct device *dev;
1378         int rc;
1379
1380         dp = container_of(dp_display, struct dp_display_private, dp_display);
1381         dev = &dp->pdev->dev;
1382
1383         dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1384                                         dp->link, &dp->dp_display.connector,
1385                                         minor);
1386         if (IS_ERR(dp->debug)) {
1387                 rc = PTR_ERR(dp->debug);
1388                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1389                 dp->debug = NULL;
1390         }
1391 }
1392
1393 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1394                         struct drm_encoder *encoder)
1395 {
1396         struct msm_drm_private *priv;
1397         int ret;
1398
1399         if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1400                 return -EINVAL;
1401
1402         priv = dev->dev_private;
1403         dp_display->drm_dev = dev;
1404
1405         ret = dp_display_request_irq(dp_display);
1406         if (ret) {
1407                 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1408                 return ret;
1409         }
1410
1411         dp_display->encoder = encoder;
1412
1413         dp_display->connector = dp_drm_connector_init(dp_display);
1414         if (IS_ERR(dp_display->connector)) {
1415                 ret = PTR_ERR(dp_display->connector);
1416                 DRM_DEV_ERROR(dev->dev,
1417                         "failed to create dp connector: %d\n", ret);
1418                 dp_display->connector = NULL;
1419                 return ret;
1420         }
1421
1422         priv->connectors[priv->num_connectors++] = dp_display->connector;
1423         return 0;
1424 }
1425
1426 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1427 {
1428         int rc = 0;
1429         struct dp_display_private *dp_display;
1430         u32 state;
1431
1432         dp_display = container_of(dp, struct dp_display_private, dp_display);
1433         if (!dp_display->dp_mode.drm_mode.clock) {
1434                 DRM_ERROR("invalid params\n");
1435                 return -EINVAL;
1436         }
1437
1438         mutex_lock(&dp_display->event_mutex);
1439
1440         /* stop sentinel checking */
1441         dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1442
1443         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1444         if (rc) {
1445                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1446                 mutex_unlock(&dp_display->event_mutex);
1447                 return rc;
1448         }
1449
1450         rc = dp_display_prepare(dp);
1451         if (rc) {
1452                 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1453                 mutex_unlock(&dp_display->event_mutex);
1454                 return rc;
1455         }
1456
1457         state =  dp_display->hpd_state;
1458
1459         if (state == ST_DISPLAY_OFF)
1460                 dp_display_host_init(dp_display, true);
1461
1462         dp_display_enable(dp_display, 0);
1463
1464         rc = dp_display_post_enable(dp);
1465         if (rc) {
1466                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1467                 dp_display_disable(dp_display, 0);
1468                 dp_display_unprepare(dp);
1469         }
1470
1471         /* manual kick off plug event to train link */
1472         if (state == ST_DISPLAY_OFF)
1473                 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1474
1475         /* completed connection */
1476         dp_display->hpd_state = ST_CONNECTED;
1477
1478         mutex_unlock(&dp_display->event_mutex);
1479
1480         return rc;
1481 }
1482
1483 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1484 {
1485         struct dp_display_private *dp_display;
1486
1487         dp_display = container_of(dp, struct dp_display_private, dp_display);
1488
1489         dp_ctrl_push_idle(dp_display->ctrl);
1490
1491         return 0;
1492 }
1493
1494 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1495 {
1496         int rc = 0;
1497         u32 state;
1498         struct dp_display_private *dp_display;
1499
1500         dp_display = container_of(dp, struct dp_display_private, dp_display);
1501
1502         mutex_lock(&dp_display->event_mutex);
1503
1504         /* stop sentinel checking */
1505         dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1506
1507         dp_display_disable(dp_display, 0);
1508
1509         rc = dp_display_unprepare(dp);
1510         if (rc)
1511                 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1512
1513         state =  dp_display->hpd_state;
1514         if (state == ST_DISCONNECT_PENDING) {
1515                 /* completed disconnection */
1516                 dp_display->hpd_state = ST_DISCONNECTED;
1517         } else {
1518                 dp_display->hpd_state = ST_DISPLAY_OFF;
1519         }
1520
1521         mutex_unlock(&dp_display->event_mutex);
1522         return rc;
1523 }
1524
1525 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1526                                 struct drm_display_mode *mode,
1527                                 struct drm_display_mode *adjusted_mode)
1528 {
1529         struct dp_display_private *dp_display;
1530
1531         dp_display = container_of(dp, struct dp_display_private, dp_display);
1532
1533         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1534
1535         if (dp_display_check_video_test(dp))
1536                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1537         else /* Default num_components per pixel = 3 */
1538                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1539
1540         if (!dp_display->dp_mode.bpp)
1541                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1542
1543         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1544
1545         dp_display->dp_mode.v_active_low =
1546                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1547
1548         dp_display->dp_mode.h_active_low =
1549                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1550 }