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_UNPLUG_INT,
  59         EV_USER_NOTIFICATION,
  60         EV_CONNECT_PENDING_TIMEOUT,
  61         EV_DISCONNECT_PENDING_TIMEOUT,
  62 };
  63
  64 #define EVENT_TIMEOUT   (HZ/10) /* 100ms */
  65 #define DP_EVENT_Q_MAX  8
  66
  67 #define DP_TIMEOUT_5_SECOND     (5000/EVENT_TIMEOUT)
  68 #define DP_TIMEOUT_NONE         0
  69
  70 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
  71
  72 struct dp_event {
  73         u32 event_id;
  74         u32 data;
  75         u32 delay;
  76 };
  77
  78 struct dp_display_private {
  79         char *name;
  80         int irq;
  81
  82         /* state variables */
  83         bool core_initialized;
  84         bool hpd_irq_on;
  85         bool audio_supported;
  86
  87         struct platform_device *pdev;
  88         struct dentry *root;
  89
  90         struct dp_usbpd   *usbpd;
  91         struct dp_parser  *parser;
  92         struct dp_power   *power;
  93         struct dp_catalog *catalog;
  94         struct drm_dp_aux *aux;
  95         struct dp_link    *link;
  96         struct dp_panel   *panel;
  97         struct dp_ctrl    *ctrl;
  98         struct dp_debug   *debug;
  99
 100         struct dp_usbpd_cb usbpd_cb;
 101         struct dp_display_mode dp_mode;
 102         struct msm_dp dp_display;
 103
 104         /* wait for audio signaling */
 105         struct completion audio_comp;
 106
 107         /* event related only access by event thread */
 108         struct mutex event_mutex;
 109         wait_queue_head_t event_q;
 110         u32 hpd_state;
 111         u32 event_pndx;
 112         u32 event_gndx;
 113         struct dp_event event_list[DP_EVENT_Q_MAX];
 114         spinlock_t event_lock;
 115
 116         struct dp_audio *audio;
 117 };
 118
 119 static const struct of_device_id dp_dt_match[] = {
 120         {.compatible = "qcom,sc7180-dp"},
 121         {}
 122 };
 123
 124 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
 125                                                 u32 data, u32 delay)
 126 {
 127         unsigned long flag;
 128         struct dp_event *todo;
 129         int pndx;
 130
 131         spin_lock_irqsave(&dp_priv->event_lock, flag);
 132         pndx = dp_priv->event_pndx + 1;
 133         pndx %= DP_EVENT_Q_MAX;
 134         if (pndx == dp_priv->event_gndx) {
 135                 pr_err("event_q is full: pndx=%d gndx=%d\n",
 136                         dp_priv->event_pndx, dp_priv->event_gndx);
 137                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 138                 return -EPERM;
 139         }
 140         todo = &dp_priv->event_list[dp_priv->event_pndx++];
 141         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
 142         todo->event_id = event;
 143         todo->data = data;
 144         todo->delay = delay;
 145         wake_up(&dp_priv->event_q);
 146         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 147
 148         return 0;
 149 }
 150
 151 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
 152 {
 153         unsigned long flag;
 154         struct dp_event *todo;
 155         u32     gndx;
 156
 157         spin_lock_irqsave(&dp_priv->event_lock, flag);
 158         if (dp_priv->event_pndx == dp_priv->event_gndx) {
 159                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 160                 return -ENOENT;
 161         }
 162
 163         gndx = dp_priv->event_gndx;
 164         while (dp_priv->event_pndx != gndx) {
 165                 todo = &dp_priv->event_list[gndx];
 166                 if (todo->event_id == event) {
 167                         todo->event_id = EV_NO_EVENT;   /* deleted */
 168                         todo->delay = 0;
 169                 }
 170                 gndx++;
 171                 gndx %= DP_EVENT_Q_MAX;
 172         }
 173         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
 174
 175         return 0;
 176 }
 177
 178 void dp_display_signal_audio_start(struct msm_dp *dp_display)
 179 {
 180         struct dp_display_private *dp;
 181
 182         dp = container_of(dp_display, struct dp_display_private, dp_display);
 183
 184         reinit_completion(&dp->audio_comp);
 185 }
 186
 187 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
 188 {
 189         struct dp_display_private *dp;
 190
 191         dp = container_of(dp_display, struct dp_display_private, dp_display);
 192
 193         complete_all(&dp->audio_comp);
 194 }
 195
 196 static int dp_display_bind(struct device *dev, struct device *master,
 197                            void *data)
 198 {
 199         int rc = 0;
 200         struct dp_display_private *dp;
 201         struct drm_device *drm;
 202         struct msm_drm_private *priv;
 203
 204         drm = dev_get_drvdata(master);
 205
 206         dp = container_of(g_dp_display,
 207                         struct dp_display_private, dp_display);
 208
 209         dp->dp_display.drm_dev = drm;
 210         priv = drm->dev_private;
 211         priv->dp = &(dp->dp_display);
 212
 213         rc = dp->parser->parse(dp->parser);
 214         if (rc) {
 215                 DRM_ERROR("device tree parsing failed\n");
 216                 goto end;
 217         }
 218
 219         dp->aux->drm_dev = drm;
 220         rc = dp_aux_register(dp->aux);
 221         if (rc) {
 222                 DRM_ERROR("DRM DP AUX register failed\n");
 223                 goto end;
 224         }
 225
 226         rc = dp_power_client_init(dp->power);
 227         if (rc) {
 228                 DRM_ERROR("Power client create failed\n");
 229                 goto end;
 230         }
 231
 232         rc = dp_register_audio_driver(dev, dp->audio);
 233         if (rc)
 234                 DRM_ERROR("Audio registration Dp failed\n");
 235
 236 end:
 237         return rc;
 238 }
 239
 240 static void dp_display_unbind(struct device *dev, struct device *master,
 241                               void *data)
 242 {
 243         struct dp_display_private *dp;
 244         struct drm_device *drm = dev_get_drvdata(master);
 245         struct msm_drm_private *priv = drm->dev_private;
 246
 247         dp = container_of(g_dp_display,
 248                         struct dp_display_private, dp_display);
 249
 250         dp_power_client_deinit(dp->power);
 251         dp_aux_unregister(dp->aux);
 252         priv->dp = NULL;
 253 }
 254
 255 static const struct component_ops dp_display_comp_ops = {
 256         .bind = dp_display_bind,
 257         .unbind = dp_display_unbind,
 258 };
 259
 260 static bool dp_display_is_ds_bridge(struct dp_panel *panel)
 261 {
 262         return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
 263                 DP_DWN_STRM_PORT_PRESENT);
 264 }
 265
 266 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
 267 {
 268         DRM_DEBUG_DP("present=%#x sink_count=%d\n", dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT],
 269                 dp->link->sink_count);
 270         return dp_display_is_ds_bridge(dp->panel) &&
 271                 (dp->link->sink_count == 0);
 272 }
 273
 274 static void dp_display_send_hpd_event(struct msm_dp *dp_display)
 275 {
 276         struct dp_display_private *dp;
 277         struct drm_connector *connector;
 278
 279         dp = container_of(dp_display, struct dp_display_private, dp_display);
 280
 281         connector = dp->dp_display.connector;
 282         drm_helper_hpd_irq_event(connector->dev);
 283 }
 284
 285
 286 static int dp_display_send_hpd_notification(struct dp_display_private *dp,
 287                                             bool hpd)
 288 {
 289         if ((hpd && dp->dp_display.is_connected) ||
 290                         (!hpd && !dp->dp_display.is_connected)) {
 291                 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
 292                 return 0;
 293         }
 294
 295         /* reset video pattern flag on disconnect */
 296         if (!hpd)
 297                 dp->panel->video_test = false;
 298
 299         dp->dp_display.is_connected = hpd;
 300
 301         DRM_DEBUG_DP("hpd=%d\n", hpd);
 302         dp_display_send_hpd_event(&dp->dp_display);
 303
 304         return 0;
 305 }
 306
 307 static int dp_display_process_hpd_high(struct dp_display_private *dp)
 308 {
 309         int rc = 0;
 310         struct edid *edid;
 311
 312         dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
 313
 314         rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
 315         if (rc)
 316                 goto end;
 317
 318         dp_link_process_request(dp->link);
 319
 320         edid = dp->panel->edid;
 321
 322         dp->audio_supported = drm_detect_monitor_audio(edid);
 323         dp_panel_handle_sink_request(dp->panel);
 324
 325         dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
 326         dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
 327
 328         /*
 329          * set sink to normal operation mode -- D0
 330          * before dpcd read
 331          */
 332         dp_link_psm_config(dp->link, &dp->panel->link_info, false);
 333
 334         dp_link_reset_phy_params_vx_px(dp->link);
 335         rc = dp_ctrl_on_link(dp->ctrl);
 336         if (rc) {
 337                 DRM_ERROR("failed to complete DP link training\n");
 338                 goto end;
 339         }
 340
 341         dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
 342
 343 end:
 344         return rc;
 345 }
 346
 347 static void dp_display_host_init(struct dp_display_private *dp, int reset)
 348 {
 349         bool flip = false;
 350
 351         DRM_DEBUG_DP("core_initialized=%d\n", dp->core_initialized);
 352         if (dp->core_initialized) {
 353                 DRM_DEBUG_DP("DP core already initialized\n");
 354                 return;
 355         }
 356
 357         if (dp->usbpd->orientation == ORIENTATION_CC2)
 358                 flip = true;
 359
 360         dp_power_init(dp->power, flip);
 361         dp_ctrl_host_init(dp->ctrl, flip, reset);
 362         dp_aux_init(dp->aux);
 363         dp->core_initialized = true;
 364 }
 365
 366 static void dp_display_host_deinit(struct dp_display_private *dp)
 367 {
 368         if (!dp->core_initialized) {
 369                 DRM_DEBUG_DP("DP core not initialized\n");
 370                 return;
 371         }
 372
 373         dp_ctrl_host_deinit(dp->ctrl);
 374         dp_aux_deinit(dp->aux);
 375         dp_power_deinit(dp->power);
 376
 377         dp->core_initialized = false;
 378 }
 379
 380 static int dp_display_usbpd_configure_cb(struct device *dev)
 381 {
 382         int rc = 0;
 383         struct dp_display_private *dp;
 384
 385         if (!dev) {
 386                 DRM_ERROR("invalid dev\n");
 387                 rc = -EINVAL;
 388                 goto end;
 389         }
 390
 391         dp = container_of(g_dp_display,
 392                         struct dp_display_private, dp_display);
 393
 394         dp_display_host_init(dp, false);
 395
 396         rc = dp_display_process_hpd_high(dp);
 397 end:
 398         return rc;
 399 }
 400
 401 static int dp_display_usbpd_disconnect_cb(struct device *dev)
 402 {
 403         int rc = 0;
 404         struct dp_display_private *dp;
 405
 406         if (!dev) {
 407                 DRM_ERROR("invalid dev\n");
 408                 rc = -EINVAL;
 409                 return rc;
 410         }
 411
 412         dp = container_of(g_dp_display,
 413                         struct dp_display_private, dp_display);
 414
 415         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 416
 417         return rc;
 418 }
 419
 420 static void dp_display_handle_video_request(struct dp_display_private *dp)
 421 {
 422         if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
 423                 dp->panel->video_test = true;
 424                 dp_link_send_test_response(dp->link);
 425         }
 426 }
 427
 428 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
 429 {
 430         int rc = 0;
 431
 432         if (dp_display_is_sink_count_zero(dp)) {
 433                 DRM_DEBUG_DP("sink count is zero, nothing to do\n");
 434                 if (dp->hpd_state != ST_DISCONNECTED) {
 435                         dp->hpd_state = ST_DISCONNECT_PENDING;
 436                         dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
 437                 }
 438         } else {
 439                 if (dp->hpd_state == ST_DISCONNECTED) {
 440                         dp->hpd_state = ST_CONNECT_PENDING;
 441                         rc = dp_display_process_hpd_high(dp);
 442                         if (rc)
 443                                 dp->hpd_state = ST_DISCONNECTED;
 444                 }
 445         }
 446
 447         return rc;
 448 }
 449
 450 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
 451 {
 452         u32 sink_request = dp->link->sink_request;
 453
 454         DRM_DEBUG_DP("%d\n", sink_request);
 455         if (dp->hpd_state == ST_DISCONNECTED) {
 456                 if (sink_request & DP_LINK_STATUS_UPDATED) {
 457                         DRM_DEBUG_DP("Disconnected sink_request: %d\n", sink_request);
 458                         DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
 459                         return -EINVAL;
 460                 }
 461         }
 462
 463         dp_ctrl_handle_sink_request(dp->ctrl);
 464
 465         if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
 466                 dp_display_handle_video_request(dp);
 467
 468         return 0;
 469 }
 470
 471 static int dp_display_usbpd_attention_cb(struct device *dev)
 472 {
 473         int rc = 0;
 474         u32 sink_request;
 475         struct dp_display_private *dp;
 476
 477         if (!dev) {
 478                 DRM_ERROR("invalid dev\n");
 479                 return -EINVAL;
 480         }
 481
 482         dp = container_of(g_dp_display,
 483                         struct dp_display_private, dp_display);
 484
 485         /* check for any test request issued by sink */
 486         rc = dp_link_process_request(dp->link);
 487         if (!rc) {
 488                 sink_request = dp->link->sink_request;
 489                 DRM_DEBUG_DP("hpd_state=%d sink_request=%d\n", dp->hpd_state, sink_request);
 490                 if (sink_request & DS_PORT_STATUS_CHANGED)
 491                         rc = dp_display_handle_port_ststus_changed(dp);
 492                 else
 493                         rc = dp_display_handle_irq_hpd(dp);
 494         }
 495
 496         return rc;
 497 }
 498
 499 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 500 {
 501         struct dp_usbpd *hpd = dp->usbpd;
 502         u32 state;
 503         u32 tout = DP_TIMEOUT_5_SECOND;
 504         int ret;
 505
 506         if (!hpd)
 507                 return 0;
 508
 509         mutex_lock(&dp->event_mutex);
 510
 511         state =  dp->hpd_state;
 512         DRM_DEBUG_DP("hpd_state=%d\n", state);
 513         if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
 514                 mutex_unlock(&dp->event_mutex);
 515                 return 0;
 516         }
 517
 518         if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
 519                 mutex_unlock(&dp->event_mutex);
 520                 return 0;
 521         }
 522
 523         if (state == ST_DISCONNECT_PENDING) {
 524                 /* wait until ST_DISCONNECTED */
 525                 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
 526                 mutex_unlock(&dp->event_mutex);
 527                 return 0;
 528         }
 529
 530         dp->hpd_state = ST_CONNECT_PENDING;
 531
 532         hpd->hpd_high = 1;
 533
 534         ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
 535         if (ret) {      /* link train failed */
 536                 hpd->hpd_high = 0;
 537                 dp->hpd_state = ST_DISCONNECTED;
 538
 539                 if (ret == -ECONNRESET) { /* cable unplugged */
 540                         dp->core_initialized = false;
 541                 }
 542
 543         } else {
 544                 /* start sentinel checking in case of missing uevent */
 545                 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
 546         }
 547
 548         /* enable HDP irq_hpd/replug interrupt */
 549         dp_catalog_hpd_config_intr(dp->catalog,
 550                 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);
 551
 552         mutex_unlock(&dp->event_mutex);
 553
 554         /* uevent will complete connection part */
 555         return 0;
 556 };
 557
 558 static int dp_display_enable(struct dp_display_private *dp, u32 data);
 559 static int dp_display_disable(struct dp_display_private *dp, u32 data);
 560
 561 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
 562 {
 563         u32 state;
 564
 565         mutex_lock(&dp->event_mutex);
 566
 567         state = dp->hpd_state;
 568         if (state == ST_CONNECT_PENDING)
 569                 dp->hpd_state = ST_CONNECTED;
 570
 571         mutex_unlock(&dp->event_mutex);
 572
 573         return 0;
 574 }
 575
 576 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 577                 bool plugged)
 578 {
 579         struct dp_display_private *dp;
 580
 581         dp = container_of(dp_display,
 582                         struct dp_display_private, dp_display);
 583
 584         /* notify audio subsystem only if sink supports audio */
 585         if (dp_display->plugged_cb && dp_display->codec_dev &&
 586                         dp->audio_supported)
 587                 dp_display->plugged_cb(dp_display->codec_dev, plugged);
 588 }
 589
 590 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 591 {
 592         struct dp_usbpd *hpd = dp->usbpd;
 593         u32 state;
 594
 595         if (!hpd)
 596                 return 0;
 597
 598         mutex_lock(&dp->event_mutex);
 599
 600         state = dp->hpd_state;
 601
 602         /* disable irq_hpd/replug interrupts */
 603         dp_catalog_hpd_config_intr(dp->catalog,
 604                 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);
 605
 606         /* unplugged, no more irq_hpd handle */
 607         dp_del_event(dp, EV_IRQ_HPD_INT);
 608
 609         if (state == ST_DISCONNECTED) {
 610                 /* triggered by irq_hdp with sink_count = 0 */
 611                 if (dp->link->sink_count == 0) {
 612                         dp_ctrl_off_phy(dp->ctrl);
 613                         hpd->hpd_high = 0;
 614                         dp->core_initialized = false;
 615                 }
 616                 mutex_unlock(&dp->event_mutex);
 617                 return 0;
 618         }
 619
 620         if (state == ST_DISCONNECT_PENDING) {
 621                 mutex_unlock(&dp->event_mutex);
 622                 return 0;
 623         }
 624
 625         if (state == ST_CONNECT_PENDING) {
 626                 /* wait until CONNECTED */
 627                 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
 628                 mutex_unlock(&dp->event_mutex);
 629                 return 0;
 630         }
 631
 632         dp->hpd_state = ST_DISCONNECT_PENDING;
 633
 634         /* disable HPD plug interrupts */
 635         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
 636
 637         hpd->hpd_high = 0;
 638
 639         /*
 640          * We don't need separate work for disconnect as
 641          * connect/attention interrupts are disabled
 642          */
 643         dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
 644
 645         /* start sentinel checking in case of missing uevent */
 646         dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
 647
 648         DRM_DEBUG_DP("hpd_state=%d\n", state);
 649         /* signal the disconnect event early to ensure proper teardown */
 650         dp_display_handle_plugged_change(g_dp_display, false);
 651
 652         /* enable HDP plug interrupt to prepare for next plugin */
 653         dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
 654
 655         /* uevent will complete disconnection part */
 656         mutex_unlock(&dp->event_mutex);
 657         return 0;
 658 }
 659
 660 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
 661 {
 662         u32 state;
 663
 664         mutex_lock(&dp->event_mutex);
 665
 666         state =  dp->hpd_state;
 667         if (state == ST_DISCONNECT_PENDING)
 668                 dp->hpd_state = ST_DISCONNECTED;
 669
 670         mutex_unlock(&dp->event_mutex);
 671
 672         return 0;
 673 }
 674
 675 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 676 {
 677         u32 state;
 678         int ret;
 679
 680         mutex_lock(&dp->event_mutex);
 681
 682         /* irq_hpd can happen at either connected or disconnected state */
 683         state =  dp->hpd_state;
 684         if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
 685                 mutex_unlock(&dp->event_mutex);
 686                 return 0;
 687         }
 688
 689         if (state == ST_CONNECT_PENDING) {
 690                 /* wait until ST_CONNECTED */
 691                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 692                 mutex_unlock(&dp->event_mutex);
 693                 return 0;
 694         }
 695
 696         if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
 697                 /* wait until ST_CONNECTED */
 698                 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
 699                 mutex_unlock(&dp->event_mutex);
 700                 return 0;
 701         }
 702
 703         ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
 704         if (ret == -ECONNRESET) { /* cable unplugged */
 705                 dp->core_initialized = false;
 706         }
 707         DRM_DEBUG_DP("hpd_state=%d\n", state);
 708
 709         mutex_unlock(&dp->event_mutex);
 710
 711         return 0;
 712 }
 713
 714 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 715 {
 716         dp_debug_put(dp->debug);
 717         dp_panel_put(dp->panel);
 718         dp_aux_put(dp->aux);
 719         dp_audio_put(dp->audio);
 720 }
 721
 722 static int dp_init_sub_modules(struct dp_display_private *dp)
 723 {
 724         int rc = 0;
 725         struct device *dev = &dp->pdev->dev;
 726         struct dp_usbpd_cb *cb = &dp->usbpd_cb;
 727         struct dp_panel_in panel_in = {
 728                 .dev = dev,
 729         };
 730
 731         /* Callback APIs used for cable status change event */
 732         cb->configure  = dp_display_usbpd_configure_cb;
 733         cb->disconnect = dp_display_usbpd_disconnect_cb;
 734         cb->attention  = dp_display_usbpd_attention_cb;
 735
 736         dp->usbpd = dp_hpd_get(dev, cb);
 737         if (IS_ERR(dp->usbpd)) {
 738                 rc = PTR_ERR(dp->usbpd);
 739                 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
 740                 dp->usbpd = NULL;
 741                 goto error;
 742         }
 743
 744         dp->parser = dp_parser_get(dp->pdev);
 745         if (IS_ERR(dp->parser)) {
 746                 rc = PTR_ERR(dp->parser);
 747                 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
 748                 dp->parser = NULL;
 749                 goto error;
 750         }
 751
 752         dp->catalog = dp_catalog_get(dev, &dp->parser->io);
 753         if (IS_ERR(dp->catalog)) {
 754                 rc = PTR_ERR(dp->catalog);
 755                 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
 756                 dp->catalog = NULL;
 757                 goto error;
 758         }
 759
 760         dp->power = dp_power_get(dev, dp->parser);
 761         if (IS_ERR(dp->power)) {
 762                 rc = PTR_ERR(dp->power);
 763                 DRM_ERROR("failed to initialize power, rc = %d\n", rc);
 764                 dp->power = NULL;
 765                 goto error;
 766         }
 767
 768         dp->aux = dp_aux_get(dev, dp->catalog);
 769         if (IS_ERR(dp->aux)) {
 770                 rc = PTR_ERR(dp->aux);
 771                 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
 772                 dp->aux = NULL;
 773                 goto error;
 774         }
 775
 776         dp->link = dp_link_get(dev, dp->aux);
 777         if (IS_ERR(dp->link)) {
 778                 rc = PTR_ERR(dp->link);
 779                 DRM_ERROR("failed to initialize link, rc = %d\n", rc);
 780                 dp->link = NULL;
 781                 goto error_link;
 782         }
 783
 784         panel_in.aux = dp->aux;
 785         panel_in.catalog = dp->catalog;
 786         panel_in.link = dp->link;
 787
 788         dp->panel = dp_panel_get(&panel_in);
 789         if (IS_ERR(dp->panel)) {
 790                 rc = PTR_ERR(dp->panel);
 791                 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
 792                 dp->panel = NULL;
 793                 goto error_link;
 794         }
 795
 796         dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 797                                dp->power, dp->catalog, dp->parser);
 798         if (IS_ERR(dp->ctrl)) {
 799                 rc = PTR_ERR(dp->ctrl);
 800                 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
 801                 dp->ctrl = NULL;
 802                 goto error_ctrl;
 803         }
 804
 805         dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
 806         if (IS_ERR(dp->audio)) {
 807                 rc = PTR_ERR(dp->audio);
 808                 pr_err("failed to initialize audio, rc = %d\n", rc);
 809                 dp->audio = NULL;
 810                 goto error_ctrl;
 811         }
 812
 813         return rc;
 814
 815 error_ctrl:
 816         dp_panel_put(dp->panel);
 817 error_link:
 818         dp_aux_put(dp->aux);
 819 error:
 820         return rc;
 821 }
 822
 823 static int dp_display_set_mode(struct msm_dp *dp_display,
 824                                struct dp_display_mode *mode)
 825 {
 826         struct dp_display_private *dp;
 827
 828         dp = container_of(dp_display, struct dp_display_private, dp_display);
 829
 830         dp->panel->dp_mode.drm_mode = mode->drm_mode;
 831         dp->panel->dp_mode.bpp = mode->bpp;
 832         dp->panel->dp_mode.capabilities = mode->capabilities;
 833         dp_panel_init_panel_info(dp->panel);
 834         return 0;
 835 }
 836
 837 static int dp_display_prepare(struct msm_dp *dp)
 838 {
 839         return 0;
 840 }
 841
 842 static int dp_display_enable(struct dp_display_private *dp, u32 data)
 843 {
 844         int rc = 0;
 845         struct msm_dp *dp_display;
 846
 847         dp_display = g_dp_display;
 848
 849         DRM_DEBUG_DP("sink_count=%d\n", dp->link->sink_count);
 850         if (dp_display->power_on) {
 851                 DRM_DEBUG_DP("Link already setup, return\n");
 852                 return 0;
 853         }
 854
 855         rc = dp_ctrl_on_stream(dp->ctrl);
 856         if (!rc)
 857                 dp_display->power_on = true;
 858
 859         return rc;
 860 }
 861
 862 static int dp_display_post_enable(struct msm_dp *dp_display)
 863 {
 864         struct dp_display_private *dp;
 865         u32 rate;
 866
 867         dp = container_of(dp_display, struct dp_display_private, dp_display);
 868
 869         rate = dp->link->link_params.rate;
 870
 871         if (dp->audio_supported) {
 872                 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
 873                 dp->audio->lane_count = dp->link->link_params.num_lanes;
 874         }
 875
 876         /* signal the connect event late to synchronize video and display */
 877         dp_display_handle_plugged_change(dp_display, true);
 878         return 0;
 879 }
 880
 881 static int dp_display_disable(struct dp_display_private *dp, u32 data)
 882 {
 883         struct msm_dp *dp_display;
 884
 885         dp_display = g_dp_display;
 886
 887         if (!dp_display->power_on)
 888                 return 0;
 889
 890         /* wait only if audio was enabled */
 891         if (dp_display->audio_enabled) {
 892                 /* signal the disconnect event */
 893                 dp_display_handle_plugged_change(dp_display, false);
 894                 if (!wait_for_completion_timeout(&dp->audio_comp,
 895                                 HZ * 5))
 896                         DRM_ERROR("audio comp timeout\n");
 897         }
 898
 899         dp_display->audio_enabled = false;
 900
 901         /* triggered by irq_hpd with sink_count = 0 */
 902         if (dp->link->sink_count == 0) {
 903                 dp_ctrl_off_link_stream(dp->ctrl);
 904         } else {
 905                 dp_ctrl_off(dp->ctrl);
 906                 dp->core_initialized = false;
 907         }
 908
 909         dp_display->power_on = false;
 910
 911         DRM_DEBUG_DP("sink count: %d\n", dp->link->sink_count);
 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 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
1009 {
1010         struct dp_display_private *dp_display;
1011
1012         dp_display = container_of(dp, struct dp_display_private, dp_display);
1013
1014         /*
1015          * if we are reading registers we need the link clocks to be on
1016          * however till DP cable is connected this will not happen as we
1017          * do not know the resolution to power up with. Hence check the
1018          * power_on status before dumping DP registers to avoid crash due
1019          * to unclocked access
1020          */
1021         mutex_lock(&dp_display->event_mutex);
1022
1023         if (!dp->power_on) {
1024                 mutex_unlock(&dp_display->event_mutex);
1025                 return;
1026         }
1027
1028         dp_catalog_snapshot(dp_display->catalog, disp_state);
1029
1030         mutex_unlock(&dp_display->event_mutex);
1031 }
1032
1033 static void dp_display_config_hpd(struct dp_display_private *dp)
1034 {
1035
1036         dp_display_host_init(dp, true);
1037         dp_catalog_ctrl_hpd_config(dp->catalog);
1038
1039         /* Enable interrupt first time
1040          * we are leaving dp clocks on during disconnect
1041          * and never disable interrupt
1042          */
1043         enable_irq(dp->irq);
1044 }
1045
1046 static int hpd_event_thread(void *data)
1047 {
1048         struct dp_display_private *dp_priv;
1049         unsigned long flag;
1050         struct dp_event *todo;
1051         int timeout_mode = 0;
1052
1053         dp_priv = (struct dp_display_private *)data;
1054
1055         while (1) {
1056                 if (timeout_mode) {
1057                         wait_event_timeout(dp_priv->event_q,
1058                                 (dp_priv->event_pndx == dp_priv->event_gndx),
1059                                                 EVENT_TIMEOUT);
1060                 } else {
1061                         wait_event_interruptible(dp_priv->event_q,
1062                                 (dp_priv->event_pndx != dp_priv->event_gndx));
1063                 }
1064                 spin_lock_irqsave(&dp_priv->event_lock, flag);
1065                 todo = &dp_priv->event_list[dp_priv->event_gndx];
1066                 if (todo->delay) {
1067                         struct dp_event *todo_next;
1068
1069                         dp_priv->event_gndx++;
1070                         dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1071
1072                         /* re enter delay event into q */
1073                         todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
1074                         dp_priv->event_pndx %= DP_EVENT_Q_MAX;
1075                         todo_next->event_id = todo->event_id;
1076                         todo_next->data = todo->data;
1077                         todo_next->delay = todo->delay - 1;
1078
1079                         /* clean up older event */
1080                         todo->event_id = EV_NO_EVENT;
1081                         todo->delay = 0;
1082
1083                         /* switch to timeout mode */
1084                         timeout_mode = 1;
1085                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1086                         continue;
1087                 }
1088
1089                 /* timeout with no events in q */
1090                 if (dp_priv->event_pndx == dp_priv->event_gndx) {
1091                         spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1092                         continue;
1093                 }
1094
1095                 dp_priv->event_gndx++;
1096                 dp_priv->event_gndx %= DP_EVENT_Q_MAX;
1097                 timeout_mode = 0;
1098                 spin_unlock_irqrestore(&dp_priv->event_lock, flag);
1099
1100                 switch (todo->event_id) {
1101                 case EV_HPD_INIT_SETUP:
1102                         dp_display_config_hpd(dp_priv);
1103                         break;
1104                 case EV_HPD_PLUG_INT:
1105                         dp_hpd_plug_handle(dp_priv, todo->data);
1106                         break;
1107                 case EV_HPD_UNPLUG_INT:
1108                         dp_hpd_unplug_handle(dp_priv, todo->data);
1109                         break;
1110                 case EV_IRQ_HPD_INT:
1111                         dp_irq_hpd_handle(dp_priv, todo->data);
1112                         break;
1113                 case EV_USER_NOTIFICATION:
1114                         dp_display_send_hpd_notification(dp_priv,
1115                                                 todo->data);
1116                         break;
1117                 case EV_CONNECT_PENDING_TIMEOUT:
1118                         dp_connect_pending_timeout(dp_priv,
1119                                                 todo->data);
1120                         break;
1121                 case EV_DISCONNECT_PENDING_TIMEOUT:
1122                         dp_disconnect_pending_timeout(dp_priv,
1123                                                 todo->data);
1124                         break;
1125                 default:
1126                         break;
1127                 }
1128         }
1129
1130         return 0;
1131 }
1132
1133 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)
1134 {
1135         init_waitqueue_head(&dp_priv->event_q);
1136         spin_lock_init(&dp_priv->event_lock);
1137
1138         kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
1139 }
1140
1141 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
1142 {
1143         struct dp_display_private *dp = dev_id;
1144         irqreturn_t ret = IRQ_HANDLED;
1145         u32 hpd_isr_status;
1146
1147         if (!dp) {
1148                 DRM_ERROR("invalid data\n");
1149                 return IRQ_NONE;
1150         }
1151
1152         hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
1153
1154         DRM_DEBUG_DP("hpd isr status=%#x\n", hpd_isr_status);
1155         if (hpd_isr_status & 0x0F) {
1156                 /* hpd related interrupts */
1157                 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
1158                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
1159
1160                 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
1161                         /* stop sentinel connect pending checking */
1162                         dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);
1163                         dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
1164                 }
1165
1166                 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
1167                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1168                         dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
1169                 }
1170
1171                 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
1172                         dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
1173         }
1174
1175         /* DP controller isr */
1176         dp_ctrl_isr(dp->ctrl);
1177
1178         /* DP aux isr */
1179         dp_aux_isr(dp->aux);
1180
1181         return ret;
1182 }
1183
1184 int dp_display_request_irq(struct msm_dp *dp_display)
1185 {
1186         int rc = 0;
1187         struct dp_display_private *dp;
1188
1189         if (!dp_display) {
1190                 DRM_ERROR("invalid input\n");
1191                 return -EINVAL;
1192         }
1193
1194         dp = container_of(dp_display, struct dp_display_private, dp_display);
1195
1196         dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
1197         if (dp->irq < 0) {
1198                 rc = dp->irq;
1199                 DRM_ERROR("failed to get irq: %d\n", rc);
1200                 return rc;
1201         }
1202
1203         rc = devm_request_irq(&dp->pdev->dev, dp->irq,
1204                         dp_display_irq_handler,
1205                         IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
1206         if (rc < 0) {
1207                 DRM_ERROR("failed to request IRQ%u: %d\n",
1208                                 dp->irq, rc);
1209                 return rc;
1210         }
1211         disable_irq(dp->irq);
1212
1213         return 0;
1214 }
1215
1216 static int dp_display_probe(struct platform_device *pdev)
1217 {
1218         int rc = 0;
1219         struct dp_display_private *dp;
1220
1221         if (!pdev || !pdev->dev.of_node) {
1222                 DRM_ERROR("pdev not found\n");
1223                 return -ENODEV;
1224         }
1225
1226         dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
1227         if (!dp)
1228                 return -ENOMEM;
1229
1230         dp->pdev = pdev;
1231         dp->name = "drm_dp";
1232
1233         rc = dp_init_sub_modules(dp);
1234         if (rc) {
1235                 DRM_ERROR("init sub module failed\n");
1236                 return -EPROBE_DEFER;
1237         }
1238
1239         mutex_init(&dp->event_mutex);
1240         g_dp_display = &dp->dp_display;
1241
1242         /* Store DP audio handle inside DP display */
1243         g_dp_display->dp_audio = dp->audio;
1244
1245         init_completion(&dp->audio_comp);
1246
1247         platform_set_drvdata(pdev, g_dp_display);
1248
1249         rc = component_add(&pdev->dev, &dp_display_comp_ops);
1250         if (rc) {
1251                 DRM_ERROR("component add failed, rc=%d\n", rc);
1252                 dp_display_deinit_sub_modules(dp);
1253         }
1254
1255         return rc;
1256 }
1257
1258 static int dp_display_remove(struct platform_device *pdev)
1259 {
1260         struct dp_display_private *dp;
1261
1262         dp = container_of(g_dp_display,
1263                         struct dp_display_private, dp_display);
1264
1265         dp_display_deinit_sub_modules(dp);
1266
1267         component_del(&pdev->dev, &dp_display_comp_ops);
1268         platform_set_drvdata(pdev, NULL);
1269
1270         return 0;
1271 }
1272
1273 static int dp_pm_resume(struct device *dev)
1274 {
1275         struct platform_device *pdev = to_platform_device(dev);
1276         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1277         struct dp_display_private *dp;
1278         int sink_count = 0;
1279
1280         dp = container_of(dp_display, struct dp_display_private, dp_display);
1281
1282         mutex_lock(&dp->event_mutex);
1283
1284         DRM_DEBUG_DP("Before, core_inited=%d power_on=%d\n",
1285                         dp->core_initialized, dp_display->power_on);
1286
1287         /* start from disconnected state */
1288         dp->hpd_state = ST_DISCONNECTED;
1289
1290         /* turn on dp ctrl/phy */
1291         dp_display_host_init(dp, true);
1292
1293         dp_catalog_ctrl_hpd_config(dp->catalog);
1294
1295         /*
1296          * set sink to normal operation mode -- D0
1297          * before dpcd read
1298          */
1299         dp_link_psm_config(dp->link, &dp->panel->link_info, false);
1300
1301         if (dp_catalog_link_is_connected(dp->catalog)) {
1302                 sink_count = drm_dp_read_sink_count(dp->aux);
1303                 if (sink_count < 0)
1304                         sink_count = 0;
1305         }
1306
1307         dp->link->sink_count = sink_count;
1308         /*
1309          * can not declared display is connected unless
1310          * HDMI cable is plugged in and sink_count of
1311          * dongle become 1
1312          */
1313         if (dp->link->sink_count)
1314                 dp->dp_display.is_connected = true;
1315         else
1316                 dp->dp_display.is_connected = false;
1317
1318         dp_display_handle_plugged_change(g_dp_display,
1319                                 dp->dp_display.is_connected);
1320
1321         DRM_DEBUG_DP("After, sink_count=%d is_connected=%d core_inited=%d power_on=%d\n",
1322                         dp->link->sink_count, dp->dp_display.is_connected,
1323                         dp->core_initialized, dp_display->power_on);
1324
1325         mutex_unlock(&dp->event_mutex);
1326
1327         return 0;
1328 }
1329
1330 static int dp_pm_suspend(struct device *dev)
1331 {
1332         struct platform_device *pdev = to_platform_device(dev);
1333         struct msm_dp *dp_display = platform_get_drvdata(pdev);
1334         struct dp_display_private *dp;
1335
1336         dp = container_of(dp_display, struct dp_display_private, dp_display);
1337
1338         mutex_lock(&dp->event_mutex);
1339
1340         DRM_DEBUG_DP("Before, core_inited=%d power_on=%d\n",
1341                         dp->core_initialized, dp_display->power_on);
1342
1343         if (dp->core_initialized == true) {
1344                 /* mainlink enabled */
1345                 if (dp_power_clk_status(dp->power, DP_CTRL_PM))
1346                         dp_ctrl_off_link_stream(dp->ctrl);
1347
1348                 dp_display_host_deinit(dp);
1349         }
1350
1351         dp->hpd_state = ST_SUSPENDED;
1352
1353         /* host_init will be called at pm_resume */
1354         dp->core_initialized = false;
1355
1356         DRM_DEBUG_DP("After, core_inited=%d power_on=%d\n",
1357                         dp->core_initialized, dp_display->power_on);
1358
1359         mutex_unlock(&dp->event_mutex);
1360
1361         return 0;
1362 }
1363
1364 static int dp_pm_prepare(struct device *dev)
1365 {
1366         return 0;
1367 }
1368
1369 static void dp_pm_complete(struct device *dev)
1370 {
1371
1372 }
1373
1374 static const struct dev_pm_ops dp_pm_ops = {
1375         .suspend = dp_pm_suspend,
1376         .resume =  dp_pm_resume,
1377         .prepare = dp_pm_prepare,
1378         .complete = dp_pm_complete,
1379 };
1380
1381 static struct platform_driver dp_display_driver = {
1382         .probe  = dp_display_probe,
1383         .remove = dp_display_remove,
1384         .driver = {
1385                 .name = "msm-dp-display",
1386                 .of_match_table = dp_dt_match,
1387                 .suppress_bind_attrs = true,
1388                 .pm = &dp_pm_ops,
1389         },
1390 };
1391
1392 int __init msm_dp_register(void)
1393 {
1394         int ret;
1395
1396         ret = platform_driver_register(&dp_display_driver);
1397         if (ret)
1398                 DRM_ERROR("Dp display driver register failed");
1399
1400         return ret;
1401 }
1402
1403 void __exit msm_dp_unregister(void)
1404 {
1405         platform_driver_unregister(&dp_display_driver);
1406 }
1407
1408 void msm_dp_irq_postinstall(struct msm_dp *dp_display)
1409 {
1410         struct dp_display_private *dp;
1411
1412         if (!dp_display)
1413                 return;
1414
1415         dp = container_of(dp_display, struct dp_display_private, dp_display);
1416
1417         dp_hpd_event_setup(dp);
1418
1419         dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
1420 }
1421
1422 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
1423 {
1424         struct dp_display_private *dp;
1425         struct device *dev;
1426         int rc;
1427
1428         dp = container_of(dp_display, struct dp_display_private, dp_display);
1429         dev = &dp->pdev->dev;
1430
1431         dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1432                                         dp->link, &dp->dp_display.connector,
1433                                         minor);
1434         if (IS_ERR(dp->debug)) {
1435                 rc = PTR_ERR(dp->debug);
1436                 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
1437                 dp->debug = NULL;
1438         }
1439 }
1440
1441 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
1442                         struct drm_encoder *encoder)
1443 {
1444         struct msm_drm_private *priv;
1445         int ret;
1446
1447         if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
1448                 return -EINVAL;
1449
1450         priv = dev->dev_private;
1451         dp_display->drm_dev = dev;
1452
1453         ret = dp_display_request_irq(dp_display);
1454         if (ret) {
1455                 DRM_ERROR("request_irq failed, ret=%d\n", ret);
1456                 return ret;
1457         }
1458
1459         dp_display->encoder = encoder;
1460
1461         dp_display->connector = dp_drm_connector_init(dp_display);
1462         if (IS_ERR(dp_display->connector)) {
1463                 ret = PTR_ERR(dp_display->connector);
1464                 DRM_DEV_ERROR(dev->dev,
1465                         "failed to create dp connector: %d\n", ret);
1466                 dp_display->connector = NULL;
1467                 return ret;
1468         }
1469
1470         priv->connectors[priv->num_connectors++] = dp_display->connector;
1471         return 0;
1472 }
1473
1474 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
1475 {
1476         int rc = 0;
1477         struct dp_display_private *dp_display;
1478         u32 state;
1479
1480         dp_display = container_of(dp, struct dp_display_private, dp_display);
1481         if (!dp_display->dp_mode.drm_mode.clock) {
1482                 DRM_ERROR("invalid params\n");
1483                 return -EINVAL;
1484         }
1485
1486         mutex_lock(&dp_display->event_mutex);
1487
1488         /* stop sentinel checking */
1489         dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);
1490
1491         rc = dp_display_set_mode(dp, &dp_display->dp_mode);
1492         if (rc) {
1493                 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
1494                 mutex_unlock(&dp_display->event_mutex);
1495                 return rc;
1496         }
1497
1498         rc = dp_display_prepare(dp);
1499         if (rc) {
1500                 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
1501                 mutex_unlock(&dp_display->event_mutex);
1502                 return rc;
1503         }
1504
1505         state =  dp_display->hpd_state;
1506
1507         if (state == ST_DISPLAY_OFF)
1508                 dp_display_host_init(dp_display, true);
1509
1510         dp_display_enable(dp_display, 0);
1511
1512         rc = dp_display_post_enable(dp);
1513         if (rc) {
1514                 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
1515                 dp_display_disable(dp_display, 0);
1516                 dp_display_unprepare(dp);
1517         }
1518
1519         /* manual kick off plug event to train link */
1520         if (state == ST_DISPLAY_OFF)
1521                 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);
1522
1523         /* completed connection */
1524         dp_display->hpd_state = ST_CONNECTED;
1525
1526         mutex_unlock(&dp_display->event_mutex);
1527
1528         return rc;
1529 }
1530
1531 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1532 {
1533         struct dp_display_private *dp_display;
1534
1535         dp_display = container_of(dp, struct dp_display_private, dp_display);
1536
1537         dp_ctrl_push_idle(dp_display->ctrl);
1538
1539         return 0;
1540 }
1541
1542 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
1543 {
1544         int rc = 0;
1545         u32 state;
1546         struct dp_display_private *dp_display;
1547
1548         dp_display = container_of(dp, struct dp_display_private, dp_display);
1549
1550         mutex_lock(&dp_display->event_mutex);
1551
1552         /* stop sentinel checking */
1553         dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);
1554
1555         dp_display_disable(dp_display, 0);
1556
1557         rc = dp_display_unprepare(dp);
1558         if (rc)
1559                 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);
1560
1561         state =  dp_display->hpd_state;
1562         if (state == ST_DISCONNECT_PENDING) {
1563                 /* completed disconnection */
1564                 dp_display->hpd_state = ST_DISCONNECTED;
1565         } else {
1566                 dp_display->hpd_state = ST_DISPLAY_OFF;
1567         }
1568
1569         mutex_unlock(&dp_display->event_mutex);
1570         return rc;
1571 }
1572
1573 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
1574                                 struct drm_display_mode *mode,
1575                                 struct drm_display_mode *adjusted_mode)
1576 {
1577         struct dp_display_private *dp_display;
1578
1579         dp_display = container_of(dp, struct dp_display_private, dp_display);
1580
1581         memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
1582
1583         if (dp_display_check_video_test(dp))
1584                 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
1585         else /* Default num_components per pixel = 3 */
1586                 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
1587
1588         if (!dp_display->dp_mode.bpp)
1589                 dp_display->dp_mode.bpp = 24; /* Default bpp */
1590
1591         drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
1592
1593         dp_display->dp_mode.v_active_low =
1594                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
1595
1596         dp_display->dp_mode.h_active_low =
1597                 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
1598 }