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 drm_i915_private *dev_priv = to_i915(encoder->base.dev);
  38         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  39         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  40         struct intel_dp *intel_dp = &intel_dig_port->dp;
  41         struct drm_connector *connector = conn_state->connector;
  42         void *port = to_intel_connector(connector)->port;
  43         struct drm_atomic_state *state = pipe_config->base.state;
  44         int bpp;
  45         int lane_count, slots = 0;
  46         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  47         int mst_pbn;
  48         bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
  49                                            DP_DPCD_QUIRK_CONSTANT_N);
  50
  51         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
  52                 return false;
  53
  54         pipe_config->has_pch_encoder = false;
  55         bpp = 24;
  56         if (intel_dp->compliance.test_data.bpc) {
  57                 bpp = intel_dp->compliance.test_data.bpc * 3;
  58                 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
  59                               bpp);
  60         }
  61         /*
  62          * for MST we always configure max link bw - the spec doesn't
  63          * seem to suggest we should do otherwise.
  64          */
  65         lane_count = intel_dp_max_lane_count(intel_dp);
  66
  67         pipe_config->lane_count = lane_count;
  68
  69         pipe_config->pipe_bpp = bpp;
  70
  71         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  72
  73         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
  74                 pipe_config->has_audio = true;
  75
  76         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  77         pipe_config->pbn = mst_pbn;
  78
  79         /* Zombie connectors can't have VCPI slots */
  80         if (!drm_connector_is_unregistered(connector)) {
  81                 slots = drm_dp_atomic_find_vcpi_slots(state,
  82                                                       &intel_dp->mst_mgr,
  83                                                       port,
  84                                                       mst_pbn);
  85                 if (slots < 0) {
  86                         DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
  87                                       slots);
  88                         return false;
  89                 }
  90         }
  91
  92         intel_link_compute_m_n(bpp, lane_count,
  93                                adjusted_mode->crtc_clock,
  94                                pipe_config->port_clock,
  95                                &pipe_config->dp_m_n,
  96                                constant_n);
  97
  98         pipe_config->dp_m_n.tu = slots;
  99
 100         if (IS_GEN9_LP(dev_priv))
 101                 pipe_config->lane_lat_optim_mask =
 102                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 103
 104         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 105
 106         return true;
 107 }
 108
 109 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
 110                 struct drm_connector_state *new_conn_state)
 111 {
 112         struct drm_atomic_state *state = new_conn_state->state;
 113         struct drm_connector_state *old_conn_state;
 114         struct drm_crtc *old_crtc;
 115         struct drm_crtc_state *crtc_state;
 116         int slots, ret = 0;
 117
 118         old_conn_state = drm_atomic_get_old_connector_state(state, connector);
 119         old_crtc = old_conn_state->crtc;
 120         if (!old_crtc)
 121                 return ret;
 122
 123         crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 124         slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
 125         if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
 126                 struct drm_dp_mst_topology_mgr *mgr;
 127                 struct drm_encoder *old_encoder;
 128
 129                 old_encoder = old_conn_state->best_encoder;
 130                 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
 131
 132                 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
 133                 if (ret)
 134                         DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
 135                 else
 136                         to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 137         }
 138         return ret;
 139 }
 140
 141 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 142                                  const struct intel_crtc_state *old_crtc_state,
 143                                  const struct drm_connector_state *old_conn_state)
 144 {
 145         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 146         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 147         struct intel_dp *intel_dp = &intel_dig_port->dp;
 148         struct intel_connector *connector =
 149                 to_intel_connector(old_conn_state->connector);
 150         int ret;
 151
 152         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 153
 154         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 155
 156         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 157         if (ret) {
 158                 DRM_ERROR("failed to update payload %d\n", ret);
 159         }
 160         if (old_crtc_state->has_audio)
 161                 intel_audio_codec_disable(encoder,
 162                                           old_crtc_state, old_conn_state);
 163 }
 164
 165 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 166                                       const struct intel_crtc_state *old_crtc_state,
 167                                       const struct drm_connector_state *old_conn_state)
 168 {
 169         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 170         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 171         struct intel_dp *intel_dp = &intel_dig_port->dp;
 172         struct intel_connector *connector =
 173                 to_intel_connector(old_conn_state->connector);
 174
 175         intel_ddi_disable_pipe_clock(old_crtc_state);
 176
 177         /* this can fail */
 178         drm_dp_check_act_status(&intel_dp->mst_mgr);
 179         /* and this can also fail */
 180         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 181
 182         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 183
 184         /*
 185          * Power down mst path before disabling the port, otherwise we end
 186          * up getting interrupts from the sink upon detecting link loss.
 187          */
 188         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 189                                      false);
 190
 191         intel_dp->active_mst_links--;
 192
 193         intel_mst->connector = NULL;
 194         if (intel_dp->active_mst_links == 0) {
 195                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 196                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 197                                                   old_crtc_state, NULL);
 198         }
 199
 200         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 201 }
 202
 203 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 204                                         const struct intel_crtc_state *pipe_config,
 205                                         const struct drm_connector_state *conn_state)
 206 {
 207         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 208         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 209         struct intel_dp *intel_dp = &intel_dig_port->dp;
 210
 211         if (intel_dp->active_mst_links == 0 &&
 212             intel_dig_port->base.pre_pll_enable)
 213                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 214                                                     pipe_config, NULL);
 215 }
 216
 217 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 218                                     const struct intel_crtc_state *pipe_config,
 219                                     const struct drm_connector_state *conn_state)
 220 {
 221         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 222         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 223         struct intel_dp *intel_dp = &intel_dig_port->dp;
 224         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 225         enum port port = intel_dig_port->base.port;
 226         struct intel_connector *connector =
 227                 to_intel_connector(conn_state->connector);
 228         int ret;
 229         uint32_t temp;
 230
 231         /* MST encoders are bound to a crtc, not to a connector,
 232          * force the mapping here for get_hw_state.
 233          */
 234         connector->encoder = encoder;
 235         intel_mst->connector = connector;
 236
 237         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 238
 239         if (intel_dp->active_mst_links == 0)
 240                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 241
 242         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 243
 244         if (intel_dp->active_mst_links == 0)
 245                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 246                                                 pipe_config, NULL);
 247
 248         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 249                                        connector->port,
 250                                        pipe_config->pbn,
 251                                        pipe_config->dp_m_n.tu);
 252         if (!ret)
 253                 DRM_ERROR("failed to allocate vcpi\n");
 254
 255         intel_dp->active_mst_links++;
 256         temp = I915_READ(DP_TP_STATUS(port));
 257         I915_WRITE(DP_TP_STATUS(port), temp);
 258
 259         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 260
 261         intel_ddi_enable_pipe_clock(pipe_config);
 262 }
 263
 264 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 265                                 const struct intel_crtc_state *pipe_config,
 266                                 const struct drm_connector_state *conn_state)
 267 {
 268         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 269         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 270         struct intel_dp *intel_dp = &intel_dig_port->dp;
 271         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 272         enum port port = intel_dig_port->base.port;
 273
 274         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 275
 276         if (intel_wait_for_register(dev_priv,
 277                                     DP_TP_STATUS(port),
 278                                     DP_TP_STATUS_ACT_SENT,
 279                                     DP_TP_STATUS_ACT_SENT,
 280                                     1))
 281                 DRM_ERROR("Timed out waiting for ACT sent\n");
 282
 283         drm_dp_check_act_status(&intel_dp->mst_mgr);
 284
 285         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 286         if (pipe_config->has_audio)
 287                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 288 }
 289
 290 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 291                                       enum pipe *pipe)
 292 {
 293         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 294         *pipe = intel_mst->pipe;
 295         if (intel_mst->connector)
 296                 return true;
 297         return false;
 298 }
 299
 300 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 301                                         struct intel_crtc_state *pipe_config)
 302 {
 303         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 304         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 305
 306         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 307 }
 308
 309 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 310 {
 311         struct intel_connector *intel_connector = to_intel_connector(connector);
 312         struct intel_dp *intel_dp = intel_connector->mst_port;
 313         struct edid *edid;
 314         int ret;
 315
 316         if (drm_connector_is_unregistered(connector))
 317                 return intel_connector_update_modes(connector, NULL);
 318
 319         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 320         ret = intel_connector_update_modes(connector, edid);
 321         kfree(edid);
 322
 323         return ret;
 324 }
 325
 326 static enum drm_connector_status
 327 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 328 {
 329         struct intel_connector *intel_connector = to_intel_connector(connector);
 330         struct intel_dp *intel_dp = intel_connector->mst_port;
 331
 332         if (drm_connector_is_unregistered(connector))
 333                 return connector_status_disconnected;
 334         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 335                                       intel_connector->port);
 336 }
 337
 338 static void
 339 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 340 {
 341         struct intel_connector *intel_connector = to_intel_connector(connector);
 342
 343         if (!IS_ERR_OR_NULL(intel_connector->edid))
 344                 kfree(intel_connector->edid);
 345
 346         drm_connector_cleanup(connector);
 347         kfree(connector);
 348 }
 349
 350 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 351         .detect = intel_dp_mst_detect,
 352         .fill_modes = drm_helper_probe_single_connector_modes,
 353         .late_register = intel_connector_register,
 354         .early_unregister = intel_connector_unregister,
 355         .destroy = intel_dp_mst_connector_destroy,
 356         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 357         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 358 };
 359
 360 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 361 {
 362         return intel_dp_mst_get_ddc_modes(connector);
 363 }
 364
 365 static enum drm_mode_status
 366 intel_dp_mst_mode_valid(struct drm_connector *connector,
 367                         struct drm_display_mode *mode)
 368 {
 369         struct intel_connector *intel_connector = to_intel_connector(connector);
 370         struct intel_dp *intel_dp = intel_connector->mst_port;
 371         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 372         int bpp = 24; /* MST uses fixed bpp */
 373         int max_rate, mode_rate, max_lanes, max_link_clock;
 374
 375         if (drm_connector_is_unregistered(connector))
 376                 return MODE_ERROR;
 377
 378         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 379                 return MODE_NO_DBLESCAN;
 380
 381         max_link_clock = intel_dp_max_link_rate(intel_dp);
 382         max_lanes = intel_dp_max_lane_count(intel_dp);
 383
 384         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 385         mode_rate = intel_dp_link_required(mode->clock, bpp);
 386
 387         /* TODO - validate mode against available PBN for link */
 388         if (mode->clock < 10000)
 389                 return MODE_CLOCK_LOW;
 390
 391         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 392                 return MODE_H_ILLEGAL;
 393
 394         if (mode_rate > max_rate || mode->clock > max_dotclk)
 395                 return MODE_CLOCK_HIGH;
 396
 397         return MODE_OK;
 398 }
 399
 400 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 401                                                          struct drm_connector_state *state)
 402 {
 403         struct intel_connector *intel_connector = to_intel_connector(connector);
 404         struct intel_dp *intel_dp = intel_connector->mst_port;
 405         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 406
 407         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 408 }
 409
 410 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 411         .get_modes = intel_dp_mst_get_modes,
 412         .mode_valid = intel_dp_mst_mode_valid,
 413         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 414         .atomic_check = intel_dp_mst_atomic_check,
 415 };
 416
 417 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 418 {
 419         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 420
 421         drm_encoder_cleanup(encoder);
 422         kfree(intel_mst);
 423 }
 424
 425 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 426         .destroy = intel_dp_mst_encoder_destroy,
 427 };
 428
 429 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 430 {
 431         if (connector->encoder && connector->base.state->crtc) {
 432                 enum pipe pipe;
 433                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 434                         return false;
 435                 return true;
 436         }
 437         return false;
 438 }
 439
 440 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)
 441 {
 442         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 443         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 444         struct drm_device *dev = intel_dig_port->base.base.dev;
 445         struct drm_i915_private *dev_priv = to_i915(dev);
 446         struct intel_connector *intel_connector;
 447         struct drm_connector *connector;
 448         enum pipe pipe;
 449         int ret;
 450
 451         intel_connector = intel_connector_alloc();
 452         if (!intel_connector)
 453                 return NULL;
 454
 455         connector = &intel_connector->base;
 456         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 457                                  DRM_MODE_CONNECTOR_DisplayPort);
 458         if (ret) {
 459                 intel_connector_free(intel_connector);
 460                 return NULL;
 461         }
 462
 463         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 464
 465         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 466         intel_connector->mst_port = intel_dp;
 467         intel_connector->port = port;
 468
 469         for_each_pipe(dev_priv, pipe) {
 470                 struct drm_encoder *enc =
 471                         &intel_dp->mst_encoders[pipe]->base.base;
 472
 473                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 474                 if (ret)
 475                         goto err;
 476         }
 477
 478         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 479         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 480
 481         ret = drm_connector_set_path_property(connector, pathprop);
 482         if (ret)
 483                 goto err;
 484
 485         return connector;
 486
 487 err:
 488         drm_connector_cleanup(connector);
 489         return NULL;
 490 }
 491
 492 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 493 {
 494         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 495
 496         if (dev_priv->fbdev)
 497                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 498                                                 connector);
 499
 500         drm_connector_register(connector);
 501 }
 502
 503 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 504                                            struct drm_connector *connector)
 505 {
 506         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 507
 508         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 509         drm_connector_unregister(connector);
 510
 511         if (dev_priv->fbdev)
 512                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 513                                                    connector);
 514
 515         drm_connector_put(connector);
 516 }
 517
 518 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 519 {
 520         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 521         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 522         struct drm_device *dev = intel_dig_port->base.base.dev;
 523
 524         drm_kms_helper_hotplug_event(dev);
 525 }
 526
 527 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 528         .add_connector = intel_dp_add_mst_connector,
 529         .register_connector = intel_dp_register_mst_connector,
 530         .destroy_connector = intel_dp_destroy_mst_connector,
 531         .hotplug = intel_dp_mst_hotplug,
 532 };
 533
 534 static struct intel_dp_mst_encoder *
 535 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 536 {
 537         struct intel_dp_mst_encoder *intel_mst;
 538         struct intel_encoder *intel_encoder;
 539         struct drm_device *dev = intel_dig_port->base.base.dev;
 540
 541         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 542
 543         if (!intel_mst)
 544                 return NULL;
 545
 546         intel_mst->pipe = pipe;
 547         intel_encoder = &intel_mst->base;
 548         intel_mst->primary = intel_dig_port;
 549
 550         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 551                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 552
 553         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 554         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 555         intel_encoder->port = intel_dig_port->base.port;
 556         intel_encoder->crtc_mask = 0x7;
 557         intel_encoder->cloneable = 0;
 558
 559         intel_encoder->compute_config = intel_dp_mst_compute_config;
 560         intel_encoder->disable = intel_mst_disable_dp;
 561         intel_encoder->post_disable = intel_mst_post_disable_dp;
 562         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 563         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 564         intel_encoder->enable = intel_mst_enable_dp;
 565         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 566         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 567
 568         return intel_mst;
 569
 570 }
 571
 572 static bool
 573 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 574 {
 575         struct intel_dp *intel_dp = &intel_dig_port->dp;
 576         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 577         enum pipe pipe;
 578
 579         for_each_pipe(dev_priv, pipe)
 580                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 581         return true;
 582 }
 583
 584 int
 585 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 586 {
 587         struct intel_dp *intel_dp = &intel_dig_port->dp;
 588         struct drm_device *dev = intel_dig_port->base.base.dev;
 589         int ret;
 590
 591         intel_dp->can_mst = true;
 592         intel_dp->mst_mgr.cbs = &mst_cbs;
 593
 594         /* create encoders */
 595         intel_dp_create_fake_mst_encoders(intel_dig_port);
 596         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 597                                            &intel_dp->aux, 16, 3, conn_base_id);
 598         if (ret) {
 599                 intel_dp->can_mst = false;
 600                 return ret;
 601         }
 602         return 0;
 603 }
 604
 605 void
 606 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 607 {
 608         struct intel_dp *intel_dp = &intel_dig_port->dp;
 609
 610         if (!intel_dp->can_mst)
 611                 return;
 612
 613         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 614         /* encoders will get killed by normal cleanup */
 615 }