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