drivers/gpu/drm/i915/intel_dp_mst.c

   1 /*
   2  * Copyright © 2008 Intel Corporation
   3  *             2014 Red Hat Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  *
  24  */
  25
  26 #include <drm/drmP.h>
  27 #include "i915_drv.h"
  28 #include "intel_drv.h"
  29 #include <drm/drm_atomic_helper.h>
  30 #include <drm/drm_crtc_helper.h>
  31 #include <drm/drm_edid.h>
  32
  33 static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
  34                                         struct intel_crtc_state *pipe_config,
  35                                         struct drm_connector_state *conn_state)
  36 {
  37         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  38         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  39         struct intel_dp *intel_dp = &intel_dig_port->dp;
  40         struct intel_connector *connector =
  41                 to_intel_connector(conn_state->connector);
  42         struct drm_atomic_state *state;
  43         int bpp;
  44         int lane_count, slots;
  45         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  46         int mst_pbn;
  47
  48         pipe_config->has_pch_encoder = false;
  49         bpp = 24;
  50         /*
  51          * for MST we always configure max link bw - the spec doesn't
  52          * seem to suggest we should do otherwise.
  53          */
  54         lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
  55
  56         pipe_config->lane_count = lane_count;
  57
  58         pipe_config->pipe_bpp = 24;
  59         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  60
  61         state = pipe_config->base.state;
  62
  63         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
  64                 pipe_config->has_audio = true;
  65         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  66
  67         pipe_config->pbn = mst_pbn;
  68         slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
  69
  70         intel_link_compute_m_n(bpp, lane_count,
  71                                adjusted_mode->crtc_clock,
  72                                pipe_config->port_clock,
  73                                &pipe_config->dp_m_n);
  74
  75         pipe_config->dp_m_n.tu = slots;
  76
  77         return true;
  78
  79 }
  80
  81 static void intel_mst_disable_dp(struct intel_encoder *encoder,
  82                                  struct intel_crtc_state *old_crtc_state,
  83                                  struct drm_connector_state *old_conn_state)
  84 {
  85         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  86         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  87         struct intel_dp *intel_dp = &intel_dig_port->dp;
  88         struct intel_connector *connector =
  89                 to_intel_connector(old_conn_state->connector);
  90         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
  91         int ret;
  92
  93         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
  94
  95         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
  96
  97         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
  98         if (ret) {
  99                 DRM_ERROR("failed to update payload %d\n", ret);
 100         }
 101         if (old_crtc_state->has_audio) {
 102                 intel_audio_codec_disable(encoder);
 103                 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
 104         }
 105 }
 106
 107 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 108                                       struct intel_crtc_state *old_crtc_state,
 109                                       struct drm_connector_state *old_conn_state)
 110 {
 111         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 112         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 113         struct intel_dp *intel_dp = &intel_dig_port->dp;
 114         struct intel_connector *connector =
 115                 to_intel_connector(old_conn_state->connector);
 116
 117         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 118
 119         /* this can fail */
 120         drm_dp_check_act_status(&intel_dp->mst_mgr);
 121         /* and this can also fail */
 122         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 123
 124         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 125
 126         intel_dp->active_mst_links--;
 127
 128         intel_mst->connector = NULL;
 129         if (intel_dp->active_mst_links == 0) {
 130                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 131                                                   NULL, NULL);
 132
 133                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 134         }
 135 }
 136
 137 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 138                                     struct intel_crtc_state *pipe_config,
 139                                     struct drm_connector_state *conn_state)
 140 {
 141         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 142         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 143         struct intel_dp *intel_dp = &intel_dig_port->dp;
 144         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 145         enum port port = intel_dig_port->port;
 146         struct intel_connector *connector =
 147                 to_intel_connector(conn_state->connector);
 148         int ret;
 149         uint32_t temp;
 150         int slots;
 151
 152         /* MST encoders are bound to a crtc, not to a connector,
 153          * force the mapping here for get_hw_state.
 154          */
 155         connector->encoder = encoder;
 156         intel_mst->connector = connector;
 157
 158         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 159
 160         if (intel_dp->active_mst_links == 0) {
 161                 intel_ddi_clk_select(&intel_dig_port->base,
 162                                      pipe_config->shared_dpll);
 163
 164                 intel_prepare_dp_ddi_buffers(&intel_dig_port->base);
 165                 intel_dp_set_link_params(intel_dp,
 166                                          pipe_config->port_clock,
 167                                          pipe_config->lane_count,
 168                                          true);
 169
 170                 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
 171
 172                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 173
 174                 intel_dp_start_link_train(intel_dp);
 175                 intel_dp_stop_link_train(intel_dp);
 176         }
 177
 178         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 179                                        connector->port,
 180                                        pipe_config->pbn, &slots);
 181         if (ret == false) {
 182                 DRM_ERROR("failed to allocate vcpi\n");
 183                 return;
 184         }
 185
 186
 187         intel_dp->active_mst_links++;
 188         temp = I915_READ(DP_TP_STATUS(port));
 189         I915_WRITE(DP_TP_STATUS(port), temp);
 190
 191         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 192 }
 193
 194 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 195                                 struct intel_crtc_state *pipe_config,
 196                                 struct drm_connector_state *conn_state)
 197 {
 198         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 199         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 200         struct intel_dp *intel_dp = &intel_dig_port->dp;
 201         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 202         enum port port = intel_dig_port->port;
 203         int ret;
 204
 205         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 206
 207         if (intel_wait_for_register(dev_priv,
 208                                     DP_TP_STATUS(port),
 209                                     DP_TP_STATUS_ACT_SENT,
 210                                     DP_TP_STATUS_ACT_SENT,
 211                                     1))
 212                 DRM_ERROR("Timed out waiting for ACT sent\n");
 213
 214         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 215
 216         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 217         if (pipe_config->has_audio) {
 218                 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
 219                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 220         }
 221 }
 222
 223 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 224                                       enum pipe *pipe)
 225 {
 226         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 227         *pipe = intel_mst->pipe;
 228         if (intel_mst->connector)
 229                 return true;
 230         return false;
 231 }
 232
 233 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 234                                         struct intel_crtc_state *pipe_config)
 235 {
 236         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 237         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 238         struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
 239         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 240         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 241         u32 temp, flags = 0;
 242
 243         pipe_config->has_audio =
 244                 intel_ddi_is_audio_enabled(dev_priv, crtc);
 245
 246         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
 247         if (temp & TRANS_DDI_PHSYNC)
 248                 flags |= DRM_MODE_FLAG_PHSYNC;
 249         else
 250                 flags |= DRM_MODE_FLAG_NHSYNC;
 251         if (temp & TRANS_DDI_PVSYNC)
 252                 flags |= DRM_MODE_FLAG_PVSYNC;
 253         else
 254                 flags |= DRM_MODE_FLAG_NVSYNC;
 255
 256         switch (temp & TRANS_DDI_BPC_MASK) {
 257         case TRANS_DDI_BPC_6:
 258                 pipe_config->pipe_bpp = 18;
 259                 break;
 260         case TRANS_DDI_BPC_8:
 261                 pipe_config->pipe_bpp = 24;
 262                 break;
 263         case TRANS_DDI_BPC_10:
 264                 pipe_config->pipe_bpp = 30;
 265                 break;
 266         case TRANS_DDI_BPC_12:
 267                 pipe_config->pipe_bpp = 36;
 268                 break;
 269         default:
 270                 break;
 271         }
 272         pipe_config->base.adjusted_mode.flags |= flags;
 273
 274         pipe_config->lane_count =
 275                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
 276
 277         intel_dp_get_m_n(crtc, pipe_config);
 278
 279         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 280 }
 281
 282 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 283 {
 284         struct intel_connector *intel_connector = to_intel_connector(connector);
 285         struct intel_dp *intel_dp = intel_connector->mst_port;
 286         struct edid *edid;
 287         int ret;
 288
 289         if (!intel_dp) {
 290                 return intel_connector_update_modes(connector, NULL);
 291         }
 292
 293         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 294         ret = intel_connector_update_modes(connector, edid);
 295         kfree(edid);
 296
 297         return ret;
 298 }
 299
 300 static enum drm_connector_status
 301 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 302 {
 303         struct intel_connector *intel_connector = to_intel_connector(connector);
 304         struct intel_dp *intel_dp = intel_connector->mst_port;
 305
 306         if (!intel_dp)
 307                 return connector_status_disconnected;
 308         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 309 }
 310
 311 static int
 312 intel_dp_mst_set_property(struct drm_connector *connector,
 313                           struct drm_property *property,
 314                           uint64_t val)
 315 {
 316         return 0;
 317 }
 318
 319 static void
 320 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 321 {
 322         struct intel_connector *intel_connector = to_intel_connector(connector);
 323
 324         if (!IS_ERR_OR_NULL(intel_connector->edid))
 325                 kfree(intel_connector->edid);
 326
 327         drm_connector_cleanup(connector);
 328         kfree(connector);
 329 }
 330
 331 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 332         .dpms = drm_atomic_helper_connector_dpms,
 333         .detect = intel_dp_mst_detect,
 334         .fill_modes = drm_helper_probe_single_connector_modes,
 335         .set_property = intel_dp_mst_set_property,
 336         .atomic_get_property = intel_connector_atomic_get_property,
 337         .late_register = intel_connector_register,
 338         .early_unregister = intel_connector_unregister,
 339         .destroy = intel_dp_mst_connector_destroy,
 340         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 341         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 342 };
 343
 344 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 345 {
 346         return intel_dp_mst_get_ddc_modes(connector);
 347 }
 348
 349 static enum drm_mode_status
 350 intel_dp_mst_mode_valid(struct drm_connector *connector,
 351                         struct drm_display_mode *mode)
 352 {
 353         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 354
 355         /* TODO - validate mode against available PBN for link */
 356         if (mode->clock < 10000)
 357                 return MODE_CLOCK_LOW;
 358
 359         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 360                 return MODE_H_ILLEGAL;
 361
 362         if (mode->clock > max_dotclk)
 363                 return MODE_CLOCK_HIGH;
 364
 365         return MODE_OK;
 366 }
 367
 368 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 369                                                          struct drm_connector_state *state)
 370 {
 371         struct intel_connector *intel_connector = to_intel_connector(connector);
 372         struct intel_dp *intel_dp = intel_connector->mst_port;
 373         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 374
 375         if (!intel_dp)
 376                 return NULL;
 377         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 378 }
 379
 380 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
 381 {
 382         struct intel_connector *intel_connector = to_intel_connector(connector);
 383         struct intel_dp *intel_dp = intel_connector->mst_port;
 384         if (!intel_dp)
 385                 return NULL;
 386         return &intel_dp->mst_encoders[0]->base.base;
 387 }
 388
 389 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 390         .get_modes = intel_dp_mst_get_modes,
 391         .mode_valid = intel_dp_mst_mode_valid,
 392         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 393         .best_encoder = intel_mst_best_encoder,
 394 };
 395
 396 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 397 {
 398         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 399
 400         drm_encoder_cleanup(encoder);
 401         kfree(intel_mst);
 402 }
 403
 404 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 405         .destroy = intel_dp_mst_encoder_destroy,
 406 };
 407
 408 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 409 {
 410         if (connector->encoder && connector->base.state->crtc) {
 411                 enum pipe pipe;
 412                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 413                         return false;
 414                 return true;
 415         }
 416         return false;
 417 }
 418
 419 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
 420 {
 421 #ifdef CONFIG_DRM_FBDEV_EMULATION
 422         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 423
 424         if (dev_priv->fbdev)
 425                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 426                                                 &connector->base);
 427 #endif
 428 }
 429
 430 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
 431 {
 432 #ifdef CONFIG_DRM_FBDEV_EMULATION
 433         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 434
 435         if (dev_priv->fbdev)
 436                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 437                                                    &connector->base);
 438 #endif
 439 }
 440
 441 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
 442 {
 443         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 444         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 445         struct drm_device *dev = intel_dig_port->base.base.dev;
 446         struct intel_connector *intel_connector;
 447         struct drm_connector *connector;
 448         int i;
 449
 450         intel_connector = intel_connector_alloc();
 451         if (!intel_connector)
 452                 return NULL;
 453
 454         connector = &intel_connector->base;
 455         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 456         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 457
 458         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 459         intel_connector->mst_port = intel_dp;
 460         intel_connector->port = port;
 461
 462         for (i = PIPE_A; i <= PIPE_C; i++) {
 463                 drm_mode_connector_attach_encoder(&intel_connector->base,
 464                                                   &intel_dp->mst_encoders[i]->base.base);
 465         }
 466         intel_dp_add_properties(intel_dp, connector);
 467
 468         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 469         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 470
 471         drm_mode_connector_set_path_property(connector, pathprop);
 472         return connector;
 473 }
 474
 475 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 476 {
 477         struct intel_connector *intel_connector = to_intel_connector(connector);
 478         struct drm_device *dev = connector->dev;
 479
 480         drm_modeset_lock_all(dev);
 481         intel_connector_add_to_fbdev(intel_connector);
 482         drm_modeset_unlock_all(dev);
 483
 484         drm_connector_register(&intel_connector->base);
 485 }
 486
 487 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 488                                            struct drm_connector *connector)
 489 {
 490         struct intel_connector *intel_connector = to_intel_connector(connector);
 491         struct drm_device *dev = connector->dev;
 492
 493         drm_connector_unregister(connector);
 494
 495         /* need to nuke the connector */
 496         drm_modeset_lock_all(dev);
 497         intel_connector_remove_from_fbdev(intel_connector);
 498         intel_connector->mst_port = NULL;
 499         drm_modeset_unlock_all(dev);
 500
 501         drm_connector_unreference(&intel_connector->base);
 502         DRM_DEBUG_KMS("\n");
 503 }
 504
 505 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 506 {
 507         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 508         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 509         struct drm_device *dev = intel_dig_port->base.base.dev;
 510
 511         drm_kms_helper_hotplug_event(dev);
 512 }
 513
 514 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 515         .add_connector = intel_dp_add_mst_connector,
 516         .register_connector = intel_dp_register_mst_connector,
 517         .destroy_connector = intel_dp_destroy_mst_connector,
 518         .hotplug = intel_dp_mst_hotplug,
 519 };
 520
 521 static struct intel_dp_mst_encoder *
 522 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 523 {
 524         struct intel_dp_mst_encoder *intel_mst;
 525         struct intel_encoder *intel_encoder;
 526         struct drm_device *dev = intel_dig_port->base.base.dev;
 527
 528         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 529
 530         if (!intel_mst)
 531                 return NULL;
 532
 533         intel_mst->pipe = pipe;
 534         intel_encoder = &intel_mst->base;
 535         intel_mst->primary = intel_dig_port;
 536
 537         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 538                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 539
 540         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 541         intel_encoder->port = intel_dig_port->port;
 542         intel_encoder->crtc_mask = 0x7;
 543         intel_encoder->cloneable = 0;
 544
 545         intel_encoder->compute_config = intel_dp_mst_compute_config;
 546         intel_encoder->disable = intel_mst_disable_dp;
 547         intel_encoder->post_disable = intel_mst_post_disable_dp;
 548         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 549         intel_encoder->enable = intel_mst_enable_dp;
 550         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 551         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 552
 553         return intel_mst;
 554
 555 }
 556
 557 static bool
 558 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 559 {
 560         int i;
 561         struct intel_dp *intel_dp = &intel_dig_port->dp;
 562
 563         for (i = PIPE_A; i <= PIPE_C; i++)
 564                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
 565         return true;
 566 }
 567
 568 int
 569 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 570 {
 571         struct intel_dp *intel_dp = &intel_dig_port->dp;
 572         struct drm_device *dev = intel_dig_port->base.base.dev;
 573         int ret;
 574
 575         intel_dp->can_mst = true;
 576         intel_dp->mst_mgr.cbs = &mst_cbs;
 577
 578         /* create encoders */
 579         intel_dp_create_fake_mst_encoders(intel_dig_port);
 580         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
 581         if (ret) {
 582                 intel_dp->can_mst = false;
 583                 return ret;
 584         }
 585         return 0;
 586 }
 587
 588 void
 589 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 590 {
 591         struct intel_dp *intel_dp = &intel_dig_port->dp;
 592
 593         if (!intel_dp->can_mst)
 594                 return;
 595
 596         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 597         /* encoders will get killed by normal cleanup */
 598 }