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 "i915_drv.h"
  27 #include "intel_drv.h"
  28 #include <drm/drm_atomic_helper.h>
  29 #include <drm/drm_crtc_helper.h>
  30 #include <drm/drm_edid.h>
  31
  32 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
  33                                        struct intel_crtc_state *pipe_config,
  34                                        struct drm_connector_state *conn_state)
  35 {
  36         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
  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 drm_connector *connector = conn_state->connector;
  41         void *port = to_intel_connector(connector)->port;
  42         struct drm_atomic_state *state = pipe_config->base.state;
  43         struct drm_crtc *crtc = pipe_config->base.crtc;
  44         struct drm_crtc_state *old_crtc_state =
  45                 drm_atomic_get_old_crtc_state(state, crtc);
  46         int bpp;
  47         int lane_count, slots =
  48                 to_intel_crtc_state(old_crtc_state)->dp_m_n.tu;
  49         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  50         int mst_pbn;
  51         bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
  52                                            DP_DPCD_QUIRK_CONSTANT_N);
  53
  54         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
  55                 return -EINVAL;
  56
  57         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
  58         pipe_config->has_pch_encoder = false;
  59         bpp = 24;
  60         if (intel_dp->compliance.test_data.bpc) {
  61                 bpp = intel_dp->compliance.test_data.bpc * 3;
  62                 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
  63                               bpp);
  64         }
  65         /*
  66          * for MST we always configure max link bw - the spec doesn't
  67          * seem to suggest we should do otherwise.
  68          */
  69         lane_count = intel_dp_max_lane_count(intel_dp);
  70
  71         pipe_config->lane_count = lane_count;
  72
  73         pipe_config->pipe_bpp = bpp;
  74
  75         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  76
  77         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
  78                 pipe_config->has_audio = true;
  79
  80         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  81         pipe_config->pbn = mst_pbn;
  82
  83         /* Zombie connectors can't have VCPI slots */
  84         if (!drm_connector_is_unregistered(connector)) {
  85                 slots = drm_dp_atomic_find_vcpi_slots(state,
  86                                                       &intel_dp->mst_mgr,
  87                                                       port,
  88                                                       mst_pbn);
  89                 if (slots < 0) {
  90                         DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
  91                                       slots);
  92                         return slots;
  93                 }
  94         }
  95
  96         intel_link_compute_m_n(bpp, lane_count,
  97                                adjusted_mode->crtc_clock,
  98                                pipe_config->port_clock,
  99                                &pipe_config->dp_m_n,
 100                                constant_n);
 101
 102         pipe_config->dp_m_n.tu = slots;
 103
 104         if (IS_GEN9_LP(dev_priv))
 105                 pipe_config->lane_lat_optim_mask =
 106                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 107
 108         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 109
 110         return 0;
 111 }
 112
 113 static int
 114 intel_dp_mst_atomic_check(struct drm_connector *connector,
 115                           struct drm_connector_state *new_conn_state)
 116 {
 117         struct drm_atomic_state *state = new_conn_state->state;
 118         struct drm_connector_state *old_conn_state =
 119                 drm_atomic_get_old_connector_state(state, connector);
 120         struct intel_connector *intel_connector =
 121                 to_intel_connector(connector);
 122         struct drm_crtc *new_crtc = new_conn_state->crtc;
 123         struct drm_crtc_state *crtc_state;
 124         struct drm_dp_mst_topology_mgr *mgr;
 125         int ret = 0;
 126
 127         if (!old_conn_state->crtc)
 128                 return 0;
 129
 130         /* We only want to free VCPI if this state disables the CRTC on this
 131          * connector
 132          */
 133         if (new_crtc) {
 134                 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
 135
 136                 if (!crtc_state ||
 137                     !drm_atomic_crtc_needs_modeset(crtc_state) ||
 138                     crtc_state->enable)
 139                         return 0;
 140         }
 141
 142         mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
 143         ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
 144                                                intel_connector->port);
 145
 146         return ret;
 147 }
 148
 149 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 150                                  const struct intel_crtc_state *old_crtc_state,
 151                                  const struct drm_connector_state *old_conn_state)
 152 {
 153         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 154         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 155         struct intel_dp *intel_dp = &intel_dig_port->dp;
 156         struct intel_connector *connector =
 157                 to_intel_connector(old_conn_state->connector);
 158         int ret;
 159
 160         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 161
 162         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 163
 164         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 165         if (ret) {
 166                 DRM_ERROR("failed to update payload %d\n", ret);
 167         }
 168         if (old_crtc_state->has_audio)
 169                 intel_audio_codec_disable(encoder,
 170                                           old_crtc_state, old_conn_state);
 171 }
 172
 173 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 174                                       const struct intel_crtc_state *old_crtc_state,
 175                                       const struct drm_connector_state *old_conn_state)
 176 {
 177         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 178         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 179         struct intel_dp *intel_dp = &intel_dig_port->dp;
 180         struct intel_connector *connector =
 181                 to_intel_connector(old_conn_state->connector);
 182
 183         intel_ddi_disable_pipe_clock(old_crtc_state);
 184
 185         /* this can fail */
 186         drm_dp_check_act_status(&intel_dp->mst_mgr);
 187         /* and this can also fail */
 188         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 189
 190         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 191
 192         /*
 193          * Power down mst path before disabling the port, otherwise we end
 194          * up getting interrupts from the sink upon detecting link loss.
 195          */
 196         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 197                                      false);
 198
 199         intel_dp->active_mst_links--;
 200
 201         intel_mst->connector = NULL;
 202         if (intel_dp->active_mst_links == 0) {
 203                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 204                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 205                                                   old_crtc_state, NULL);
 206         }
 207
 208         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 209 }
 210
 211 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 212                                         const struct intel_crtc_state *pipe_config,
 213                                         const struct drm_connector_state *conn_state)
 214 {
 215         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 216         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 217         struct intel_dp *intel_dp = &intel_dig_port->dp;
 218
 219         if (intel_dp->active_mst_links == 0)
 220                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 221                                                     pipe_config, NULL);
 222 }
 223
 224 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 225                                           const struct intel_crtc_state *old_crtc_state,
 226                                           const struct drm_connector_state *old_conn_state)
 227 {
 228         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 229         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 230         struct intel_dp *intel_dp = &intel_dig_port->dp;
 231
 232         if (intel_dp->active_mst_links == 0)
 233                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 234                                                       old_crtc_state,
 235                                                       old_conn_state);
 236 }
 237
 238 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 239                                     const struct intel_crtc_state *pipe_config,
 240                                     const struct drm_connector_state *conn_state)
 241 {
 242         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 243         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 244         struct intel_dp *intel_dp = &intel_dig_port->dp;
 245         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 246         enum port port = intel_dig_port->base.port;
 247         struct intel_connector *connector =
 248                 to_intel_connector(conn_state->connector);
 249         int ret;
 250         u32 temp;
 251
 252         /* MST encoders are bound to a crtc, not to a connector,
 253          * force the mapping here for get_hw_state.
 254          */
 255         connector->encoder = encoder;
 256         intel_mst->connector = connector;
 257
 258         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 259
 260         if (intel_dp->active_mst_links == 0)
 261                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 262
 263         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 264
 265         if (intel_dp->active_mst_links == 0)
 266                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 267                                                 pipe_config, NULL);
 268
 269         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 270                                        connector->port,
 271                                        pipe_config->pbn,
 272                                        pipe_config->dp_m_n.tu);
 273         if (!ret)
 274                 DRM_ERROR("failed to allocate vcpi\n");
 275
 276         intel_dp->active_mst_links++;
 277         temp = I915_READ(DP_TP_STATUS(port));
 278         I915_WRITE(DP_TP_STATUS(port), temp);
 279
 280         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 281
 282         intel_ddi_enable_pipe_clock(pipe_config);
 283 }
 284
 285 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 286                                 const struct intel_crtc_state *pipe_config,
 287                                 const struct drm_connector_state *conn_state)
 288 {
 289         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 290         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 291         struct intel_dp *intel_dp = &intel_dig_port->dp;
 292         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 293         enum port port = intel_dig_port->base.port;
 294
 295         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 296
 297         if (intel_wait_for_register(dev_priv,
 298                                     DP_TP_STATUS(port),
 299                                     DP_TP_STATUS_ACT_SENT,
 300                                     DP_TP_STATUS_ACT_SENT,
 301                                     1))
 302                 DRM_ERROR("Timed out waiting for ACT sent\n");
 303
 304         drm_dp_check_act_status(&intel_dp->mst_mgr);
 305
 306         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 307         if (pipe_config->has_audio)
 308                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 309 }
 310
 311 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 312                                       enum pipe *pipe)
 313 {
 314         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 315         *pipe = intel_mst->pipe;
 316         if (intel_mst->connector)
 317                 return true;
 318         return false;
 319 }
 320
 321 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 322                                         struct intel_crtc_state *pipe_config)
 323 {
 324         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 325         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 326
 327         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 328 }
 329
 330 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 331 {
 332         struct intel_connector *intel_connector = to_intel_connector(connector);
 333         struct intel_dp *intel_dp = intel_connector->mst_port;
 334         struct edid *edid;
 335         int ret;
 336
 337         if (drm_connector_is_unregistered(connector))
 338                 return intel_connector_update_modes(connector, NULL);
 339
 340         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 341         ret = intel_connector_update_modes(connector, edid);
 342         kfree(edid);
 343
 344         return ret;
 345 }
 346
 347 static enum drm_connector_status
 348 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 349 {
 350         struct intel_connector *intel_connector = to_intel_connector(connector);
 351         struct intel_dp *intel_dp = intel_connector->mst_port;
 352
 353         if (drm_connector_is_unregistered(connector))
 354                 return connector_status_disconnected;
 355         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 356                                       intel_connector->port);
 357 }
 358
 359 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 360         .detect = intel_dp_mst_detect,
 361         .fill_modes = drm_helper_probe_single_connector_modes,
 362         .late_register = intel_connector_register,
 363         .early_unregister = intel_connector_unregister,
 364         .destroy = intel_connector_destroy,
 365         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 366         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 367 };
 368
 369 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 370 {
 371         return intel_dp_mst_get_ddc_modes(connector);
 372 }
 373
 374 static enum drm_mode_status
 375 intel_dp_mst_mode_valid(struct drm_connector *connector,
 376                         struct drm_display_mode *mode)
 377 {
 378         struct intel_connector *intel_connector = to_intel_connector(connector);
 379         struct intel_dp *intel_dp = intel_connector->mst_port;
 380         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 381         int bpp = 24; /* MST uses fixed bpp */
 382         int max_rate, mode_rate, max_lanes, max_link_clock;
 383
 384         if (drm_connector_is_unregistered(connector))
 385                 return MODE_ERROR;
 386
 387         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 388                 return MODE_NO_DBLESCAN;
 389
 390         max_link_clock = intel_dp_max_link_rate(intel_dp);
 391         max_lanes = intel_dp_max_lane_count(intel_dp);
 392
 393         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 394         mode_rate = intel_dp_link_required(mode->clock, bpp);
 395
 396         /* TODO - validate mode against available PBN for link */
 397         if (mode->clock < 10000)
 398                 return MODE_CLOCK_LOW;
 399
 400         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 401                 return MODE_H_ILLEGAL;
 402
 403         if (mode_rate > max_rate || mode->clock > max_dotclk)
 404                 return MODE_CLOCK_HIGH;
 405
 406         return MODE_OK;
 407 }
 408
 409 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 410                                                          struct drm_connector_state *state)
 411 {
 412         struct intel_connector *intel_connector = to_intel_connector(connector);
 413         struct intel_dp *intel_dp = intel_connector->mst_port;
 414         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 415
 416         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 417 }
 418
 419 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 420         .get_modes = intel_dp_mst_get_modes,
 421         .mode_valid = intel_dp_mst_mode_valid,
 422         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 423         .atomic_check = intel_dp_mst_atomic_check,
 424 };
 425
 426 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 427 {
 428         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 429
 430         drm_encoder_cleanup(encoder);
 431         kfree(intel_mst);
 432 }
 433
 434 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 435         .destroy = intel_dp_mst_encoder_destroy,
 436 };
 437
 438 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 439 {
 440         if (connector->encoder && connector->base.state->crtc) {
 441                 enum pipe pipe;
 442                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 443                         return false;
 444                 return true;
 445         }
 446         return false;
 447 }
 448
 449 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)
 450 {
 451         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 452         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 453         struct drm_device *dev = intel_dig_port->base.base.dev;
 454         struct drm_i915_private *dev_priv = to_i915(dev);
 455         struct intel_connector *intel_connector;
 456         struct drm_connector *connector;
 457         enum pipe pipe;
 458         int ret;
 459
 460         intel_connector = intel_connector_alloc();
 461         if (!intel_connector)
 462                 return NULL;
 463
 464         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 465         intel_connector->mst_port = intel_dp;
 466         intel_connector->port = port;
 467         drm_dp_mst_get_port_malloc(port);
 468
 469         connector = &intel_connector->base;
 470         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 471                                  DRM_MODE_CONNECTOR_DisplayPort);
 472         if (ret) {
 473                 intel_connector_free(intel_connector);
 474                 return NULL;
 475         }
 476
 477         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 478
 479         for_each_pipe(dev_priv, pipe) {
 480                 struct drm_encoder *enc =
 481                         &intel_dp->mst_encoders[pipe]->base.base;
 482
 483                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 484                 if (ret)
 485                         goto err;
 486         }
 487
 488         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 489         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 490
 491         ret = drm_connector_set_path_property(connector, pathprop);
 492         if (ret)
 493                 goto err;
 494
 495         return connector;
 496
 497 err:
 498         drm_connector_cleanup(connector);
 499         return NULL;
 500 }
 501
 502 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 503 {
 504         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 505
 506         if (dev_priv->fbdev)
 507                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 508                                                 connector);
 509
 510         drm_connector_register(connector);
 511 }
 512
 513 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 514                                            struct drm_connector *connector)
 515 {
 516         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 517
 518         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 519         drm_connector_unregister(connector);
 520
 521         if (dev_priv->fbdev)
 522                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 523                                                    connector);
 524
 525         drm_connector_put(connector);
 526 }
 527
 528 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 529         .add_connector = intel_dp_add_mst_connector,
 530         .register_connector = intel_dp_register_mst_connector,
 531         .destroy_connector = intel_dp_destroy_mst_connector,
 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->post_pll_disable = intel_mst_post_pll_disable_dp;
 564         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 565         intel_encoder->enable = intel_mst_enable_dp;
 566         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 567         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 568
 569         return intel_mst;
 570
 571 }
 572
 573 static bool
 574 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 575 {
 576         struct intel_dp *intel_dp = &intel_dig_port->dp;
 577         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 578         enum pipe pipe;
 579
 580         for_each_pipe(dev_priv, pipe)
 581                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 582         return true;
 583 }
 584
 585 int
 586 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 587 {
 588         struct intel_dp *intel_dp = &intel_dig_port->dp;
 589         struct drm_device *dev = intel_dig_port->base.base.dev;
 590         int ret;
 591
 592         intel_dp->can_mst = true;
 593         intel_dp->mst_mgr.cbs = &mst_cbs;
 594
 595         /* create encoders */
 596         intel_dp_create_fake_mst_encoders(intel_dig_port);
 597         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 598                                            &intel_dp->aux, 16, 3, conn_base_id);
 599         if (ret) {
 600                 intel_dp->can_mst = false;
 601                 return ret;
 602         }
 603         return 0;
 604 }
 605
 606 void
 607 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 608 {
 609         struct intel_dp *intel_dp = &intel_dig_port->dp;
 610
 611         if (!intel_dp->can_mst)
 612                 return;
 613
 614         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 615         /* encoders will get killed by normal cleanup */
 616 }