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 intel_connector *connector =
  42                 to_intel_connector(conn_state->connector);
  43         struct drm_atomic_state *state = pipe_config->base.state;
  44         int bpp;
  45         int lane_count, slots;
  46         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  47         int mst_pbn;
  48         bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
  49                                            DP_DPCD_QUIRK_LIMITED_M_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, connector->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         slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  80                                               connector->port, mst_pbn);
  81         if (slots < 0) {
  82                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  83                 return false;
  84         }
  85
  86         intel_link_compute_m_n(bpp, lane_count,
  87                                adjusted_mode->crtc_clock,
  88                                pipe_config->port_clock,
  89                                &pipe_config->dp_m_n,
  90                                reduce_m_n);
  91
  92         pipe_config->dp_m_n.tu = slots;
  93
  94         if (IS_GEN9_LP(dev_priv))
  95                 pipe_config->lane_lat_optim_mask =
  96                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
  97
  98         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
  99
 100         return true;
 101 }
 102
 103 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
 104                 struct drm_connector_state *new_conn_state)
 105 {
 106         struct drm_atomic_state *state = new_conn_state->state;
 107         struct drm_connector_state *old_conn_state;
 108         struct drm_crtc *old_crtc;
 109         struct drm_crtc_state *crtc_state;
 110         int slots, ret = 0;
 111
 112         old_conn_state = drm_atomic_get_old_connector_state(state, connector);
 113         old_crtc = old_conn_state->crtc;
 114         if (!old_crtc)
 115                 return ret;
 116
 117         crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 118         slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
 119         if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
 120                 struct drm_dp_mst_topology_mgr *mgr;
 121                 struct drm_encoder *old_encoder;
 122
 123                 old_encoder = old_conn_state->best_encoder;
 124                 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
 125
 126                 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
 127                 if (ret)
 128                         DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
 129                 else
 130                         to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 131         }
 132         return ret;
 133 }
 134
 135 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 136                                  const struct intel_crtc_state *old_crtc_state,
 137                                  const struct drm_connector_state *old_conn_state)
 138 {
 139         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 140         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 141         struct intel_dp *intel_dp = &intel_dig_port->dp;
 142         struct intel_connector *connector =
 143                 to_intel_connector(old_conn_state->connector);
 144         int ret;
 145
 146         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 147
 148         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 149
 150         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 151         if (ret) {
 152                 DRM_ERROR("failed to update payload %d\n", ret);
 153         }
 154         if (old_crtc_state->has_audio)
 155                 intel_audio_codec_disable(encoder,
 156                                           old_crtc_state, old_conn_state);
 157 }
 158
 159 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 160                                       const struct intel_crtc_state *old_crtc_state,
 161                                       const struct drm_connector_state *old_conn_state)
 162 {
 163         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 164         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 165         struct intel_dp *intel_dp = &intel_dig_port->dp;
 166         struct intel_connector *connector =
 167                 to_intel_connector(old_conn_state->connector);
 168
 169         intel_ddi_disable_pipe_clock(old_crtc_state);
 170
 171         /* this can fail */
 172         drm_dp_check_act_status(&intel_dp->mst_mgr);
 173         /* and this can also fail */
 174         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 175
 176         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 177
 178         /*
 179          * Power down mst path before disabling the port, otherwise we end
 180          * up getting interrupts from the sink upon detecting link loss.
 181          */
 182         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 183                                      false);
 184
 185         intel_dp->active_mst_links--;
 186
 187         intel_mst->connector = NULL;
 188         if (intel_dp->active_mst_links == 0) {
 189                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 190                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 191                                                   old_crtc_state, NULL);
 192         }
 193
 194         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 195 }
 196
 197 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 198                                         const struct intel_crtc_state *pipe_config,
 199                                         const struct drm_connector_state *conn_state)
 200 {
 201         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 202         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 203         struct intel_dp *intel_dp = &intel_dig_port->dp;
 204
 205         if (intel_dp->active_mst_links == 0 &&
 206             intel_dig_port->base.pre_pll_enable)
 207                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 208                                                     pipe_config, NULL);
 209 }
 210
 211 static void intel_mst_pre_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         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 219         enum port port = intel_dig_port->base.port;
 220         struct intel_connector *connector =
 221                 to_intel_connector(conn_state->connector);
 222         int ret;
 223         uint32_t temp;
 224
 225         /* MST encoders are bound to a crtc, not to a connector,
 226          * force the mapping here for get_hw_state.
 227          */
 228         connector->encoder = encoder;
 229         intel_mst->connector = connector;
 230
 231         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 232
 233         if (intel_dp->active_mst_links == 0)
 234                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 235
 236         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 237
 238         if (intel_dp->active_mst_links == 0)
 239                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 240                                                 pipe_config, NULL);
 241
 242         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 243                                        connector->port,
 244                                        pipe_config->pbn,
 245                                        pipe_config->dp_m_n.tu);
 246         if (ret == false) {
 247                 DRM_ERROR("failed to allocate vcpi\n");
 248                 return;
 249         }
 250
 251
 252         intel_dp->active_mst_links++;
 253         temp = I915_READ(DP_TP_STATUS(port));
 254         I915_WRITE(DP_TP_STATUS(port), temp);
 255
 256         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 257
 258         intel_ddi_enable_pipe_clock(pipe_config);
 259 }
 260
 261 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 262                                 const struct intel_crtc_state *pipe_config,
 263                                 const struct drm_connector_state *conn_state)
 264 {
 265         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 266         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 267         struct intel_dp *intel_dp = &intel_dig_port->dp;
 268         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 269         enum port port = intel_dig_port->base.port;
 270         int ret;
 271
 272         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 273
 274         if (intel_wait_for_register(dev_priv,
 275                                     DP_TP_STATUS(port),
 276                                     DP_TP_STATUS_ACT_SENT,
 277                                     DP_TP_STATUS_ACT_SENT,
 278                                     1))
 279                 DRM_ERROR("Timed out waiting for ACT sent\n");
 280
 281         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 282
 283         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 284         if (pipe_config->has_audio)
 285                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 286 }
 287
 288 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 289                                       enum pipe *pipe)
 290 {
 291         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 292         *pipe = intel_mst->pipe;
 293         if (intel_mst->connector)
 294                 return true;
 295         return false;
 296 }
 297
 298 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 299                                         struct intel_crtc_state *pipe_config)
 300 {
 301         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 302         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 303
 304         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 305 }
 306
 307 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 308 {
 309         struct intel_connector *intel_connector = to_intel_connector(connector);
 310         struct intel_dp *intel_dp = intel_connector->mst_port;
 311         struct edid *edid;
 312         int ret;
 313
 314         if (!intel_dp) {
 315                 return intel_connector_update_modes(connector, NULL);
 316         }
 317
 318         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 319         ret = intel_connector_update_modes(connector, edid);
 320         kfree(edid);
 321
 322         return ret;
 323 }
 324
 325 static enum drm_connector_status
 326 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 327 {
 328         struct intel_connector *intel_connector = to_intel_connector(connector);
 329         struct intel_dp *intel_dp = intel_connector->mst_port;
 330
 331         if (!intel_dp)
 332                 return connector_status_disconnected;
 333         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 334 }
 335
 336 static void
 337 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 338 {
 339         struct intel_connector *intel_connector = to_intel_connector(connector);
 340
 341         if (!IS_ERR_OR_NULL(intel_connector->edid))
 342                 kfree(intel_connector->edid);
 343
 344         drm_connector_cleanup(connector);
 345         kfree(connector);
 346 }
 347
 348 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 349         .detect = intel_dp_mst_detect,
 350         .fill_modes = drm_helper_probe_single_connector_modes,
 351         .late_register = intel_connector_register,
 352         .early_unregister = intel_connector_unregister,
 353         .destroy = intel_dp_mst_connector_destroy,
 354         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 355         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 356 };
 357
 358 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 359 {
 360         return intel_dp_mst_get_ddc_modes(connector);
 361 }
 362
 363 static enum drm_mode_status
 364 intel_dp_mst_mode_valid(struct drm_connector *connector,
 365                         struct drm_display_mode *mode)
 366 {
 367         struct intel_connector *intel_connector = to_intel_connector(connector);
 368         struct intel_dp *intel_dp = intel_connector->mst_port;
 369         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 370         int bpp = 24; /* MST uses fixed bpp */
 371         int max_rate, mode_rate, max_lanes, max_link_clock;
 372
 373         if (!intel_dp)
 374                 return MODE_ERROR;
 375
 376         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 377                 return MODE_NO_DBLESCAN;
 378
 379         max_link_clock = intel_dp_max_link_rate(intel_dp);
 380         max_lanes = intel_dp_max_lane_count(intel_dp);
 381
 382         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 383         mode_rate = intel_dp_link_required(mode->clock, bpp);
 384
 385         /* TODO - validate mode against available PBN for link */
 386         if (mode->clock < 10000)
 387                 return MODE_CLOCK_LOW;
 388
 389         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 390                 return MODE_H_ILLEGAL;
 391
 392         if (mode_rate > max_rate || mode->clock > max_dotclk)
 393                 return MODE_CLOCK_HIGH;
 394
 395         return MODE_OK;
 396 }
 397
 398 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 399                                                          struct drm_connector_state *state)
 400 {
 401         struct intel_connector *intel_connector = to_intel_connector(connector);
 402         struct intel_dp *intel_dp = intel_connector->mst_port;
 403         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 404
 405         if (!intel_dp)
 406                 return NULL;
 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 intel_connector *intel_connector = to_intel_connector(connector);
 507         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 508
 509         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 510         drm_connector_unregister(connector);
 511
 512         if (dev_priv->fbdev)
 513                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 514                                                    connector);
 515         /* prevent race with the check in ->detect */
 516         drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
 517         intel_connector->mst_port = NULL;
 518         drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
 519
 520         drm_connector_put(connector);
 521 }
 522
 523 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 524 {
 525         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 526         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 527         struct drm_device *dev = intel_dig_port->base.base.dev;
 528
 529         drm_kms_helper_hotplug_event(dev);
 530 }
 531
 532 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 533         .add_connector = intel_dp_add_mst_connector,
 534         .register_connector = intel_dp_register_mst_connector,
 535         .destroy_connector = intel_dp_destroy_mst_connector,
 536         .hotplug = intel_dp_mst_hotplug,
 537 };
 538
 539 static struct intel_dp_mst_encoder *
 540 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 541 {
 542         struct intel_dp_mst_encoder *intel_mst;
 543         struct intel_encoder *intel_encoder;
 544         struct drm_device *dev = intel_dig_port->base.base.dev;
 545
 546         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 547
 548         if (!intel_mst)
 549                 return NULL;
 550
 551         intel_mst->pipe = pipe;
 552         intel_encoder = &intel_mst->base;
 553         intel_mst->primary = intel_dig_port;
 554
 555         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 556                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 557
 558         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 559         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 560         intel_encoder->port = intel_dig_port->base.port;
 561         intel_encoder->crtc_mask = 0x7;
 562         intel_encoder->cloneable = 0;
 563
 564         intel_encoder->compute_config = intel_dp_mst_compute_config;
 565         intel_encoder->disable = intel_mst_disable_dp;
 566         intel_encoder->post_disable = intel_mst_post_disable_dp;
 567         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 568         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 569         intel_encoder->enable = intel_mst_enable_dp;
 570         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 571         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 572
 573         return intel_mst;
 574
 575 }
 576
 577 static bool
 578 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 579 {
 580         struct intel_dp *intel_dp = &intel_dig_port->dp;
 581         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 582         enum pipe pipe;
 583
 584         for_each_pipe(dev_priv, pipe)
 585                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 586         return true;
 587 }
 588
 589 int
 590 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 591 {
 592         struct intel_dp *intel_dp = &intel_dig_port->dp;
 593         struct drm_device *dev = intel_dig_port->base.base.dev;
 594         int ret;
 595
 596         intel_dp->can_mst = true;
 597         intel_dp->mst_mgr.cbs = &mst_cbs;
 598
 599         /* create encoders */
 600         intel_dp_create_fake_mst_encoders(intel_dig_port);
 601         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 602                                            &intel_dp->aux, 16, 3, conn_base_id);
 603         if (ret) {
 604                 intel_dp->can_mst = false;
 605                 return ret;
 606         }
 607         return 0;
 608 }
 609
 610 void
 611 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 612 {
 613         struct intel_dp *intel_dp = &intel_dig_port->dp;
 614
 615         if (!intel_dp->can_mst)
 616                 return;
 617
 618         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 619         /* encoders will get killed by normal cleanup */
 620 }