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->output_format = INTEL_OUTPUT_FORMAT_RGB;
  55         pipe_config->has_pch_encoder = false;
  56         bpp = 24;
  57         if (intel_dp->compliance.test_data.bpc) {
  58                 bpp = intel_dp->compliance.test_data.bpc * 3;
  59                 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
  60                               bpp);
  61         }
  62         /*
  63          * for MST we always configure max link bw - the spec doesn't
  64          * seem to suggest we should do otherwise.
  65          */
  66         lane_count = intel_dp_max_lane_count(intel_dp);
  67
  68         pipe_config->lane_count = lane_count;
  69
  70         pipe_config->pipe_bpp = bpp;
  71
  72         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  73
  74         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
  75                 pipe_config->has_audio = true;
  76
  77         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  78         pipe_config->pbn = mst_pbn;
  79
  80         /* Zombie connectors can't have VCPI slots */
  81         if (!drm_connector_is_unregistered(connector)) {
  82                 slots = drm_dp_atomic_find_vcpi_slots(state,
  83                                                       &intel_dp->mst_mgr,
  84                                                       port,
  85                                                       mst_pbn);
  86                 if (slots < 0) {
  87                         DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
  88                                       slots);
  89                         return false;
  90                 }
  91         }
  92
  93         intel_link_compute_m_n(bpp, lane_count,
  94                                adjusted_mode->crtc_clock,
  95                                pipe_config->port_clock,
  96                                &pipe_config->dp_m_n,
  97                                constant_n);
  98
  99         pipe_config->dp_m_n.tu = slots;
 100
 101         if (IS_GEN9_LP(dev_priv))
 102                 pipe_config->lane_lat_optim_mask =
 103                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 104
 105         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 106
 107         return true;
 108 }
 109
 110 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
 111                 struct drm_connector_state *new_conn_state)
 112 {
 113         struct drm_atomic_state *state = new_conn_state->state;
 114         struct drm_connector_state *old_conn_state;
 115         struct drm_crtc *old_crtc;
 116         struct drm_crtc_state *crtc_state;
 117         int slots, ret = 0;
 118
 119         old_conn_state = drm_atomic_get_old_connector_state(state, connector);
 120         old_crtc = old_conn_state->crtc;
 121         if (!old_crtc)
 122                 return ret;
 123
 124         crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 125         slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
 126         if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
 127                 struct drm_dp_mst_topology_mgr *mgr;
 128                 struct drm_encoder *old_encoder;
 129
 130                 old_encoder = old_conn_state->best_encoder;
 131                 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
 132
 133                 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
 134                 if (ret)
 135                         DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
 136                 else
 137                         to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 138         }
 139         return ret;
 140 }
 141
 142 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 143                                  const struct intel_crtc_state *old_crtc_state,
 144                                  const struct drm_connector_state *old_conn_state)
 145 {
 146         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 147         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 148         struct intel_dp *intel_dp = &intel_dig_port->dp;
 149         struct intel_connector *connector =
 150                 to_intel_connector(old_conn_state->connector);
 151         int ret;
 152
 153         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 154
 155         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 156
 157         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 158         if (ret) {
 159                 DRM_ERROR("failed to update payload %d\n", ret);
 160         }
 161         if (old_crtc_state->has_audio)
 162                 intel_audio_codec_disable(encoder,
 163                                           old_crtc_state, old_conn_state);
 164 }
 165
 166 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 167                                       const struct intel_crtc_state *old_crtc_state,
 168                                       const struct drm_connector_state *old_conn_state)
 169 {
 170         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 171         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 172         struct intel_dp *intel_dp = &intel_dig_port->dp;
 173         struct intel_connector *connector =
 174                 to_intel_connector(old_conn_state->connector);
 175
 176         intel_ddi_disable_pipe_clock(old_crtc_state);
 177
 178         /* this can fail */
 179         drm_dp_check_act_status(&intel_dp->mst_mgr);
 180         /* and this can also fail */
 181         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 182
 183         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 184
 185         /*
 186          * Power down mst path before disabling the port, otherwise we end
 187          * up getting interrupts from the sink upon detecting link loss.
 188          */
 189         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 190                                      false);
 191
 192         intel_dp->active_mst_links--;
 193
 194         intel_mst->connector = NULL;
 195         if (intel_dp->active_mst_links == 0) {
 196                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 197                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 198                                                   old_crtc_state, NULL);
 199         }
 200
 201         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 202 }
 203
 204 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 205                                         const struct intel_crtc_state *pipe_config,
 206                                         const struct drm_connector_state *conn_state)
 207 {
 208         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 209         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 210         struct intel_dp *intel_dp = &intel_dig_port->dp;
 211
 212         if (intel_dp->active_mst_links == 0)
 213                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 214                                                     pipe_config, NULL);
 215 }
 216
 217 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 218                                           const struct intel_crtc_state *old_crtc_state,
 219                                           const struct drm_connector_state *old_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
 225         if (intel_dp->active_mst_links == 0)
 226                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 227                                                       old_crtc_state,
 228                                                       old_conn_state);
 229 }
 230
 231 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 232                                     const struct intel_crtc_state *pipe_config,
 233                                     const struct drm_connector_state *conn_state)
 234 {
 235         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 236         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 237         struct intel_dp *intel_dp = &intel_dig_port->dp;
 238         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 239         enum port port = intel_dig_port->base.port;
 240         struct intel_connector *connector =
 241                 to_intel_connector(conn_state->connector);
 242         int ret;
 243         uint32_t temp;
 244
 245         /* MST encoders are bound to a crtc, not to a connector,
 246          * force the mapping here for get_hw_state.
 247          */
 248         connector->encoder = encoder;
 249         intel_mst->connector = connector;
 250
 251         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 252
 253         if (intel_dp->active_mst_links == 0)
 254                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 255
 256         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 257
 258         if (intel_dp->active_mst_links == 0)
 259                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 260                                                 pipe_config, NULL);
 261
 262         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 263                                        connector->port,
 264                                        pipe_config->pbn,
 265                                        pipe_config->dp_m_n.tu);
 266         if (!ret)
 267                 DRM_ERROR("failed to allocate vcpi\n");
 268
 269         intel_dp->active_mst_links++;
 270         temp = I915_READ(DP_TP_STATUS(port));
 271         I915_WRITE(DP_TP_STATUS(port), temp);
 272
 273         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 274
 275         intel_ddi_enable_pipe_clock(pipe_config);
 276 }
 277
 278 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 279                                 const struct intel_crtc_state *pipe_config,
 280                                 const struct drm_connector_state *conn_state)
 281 {
 282         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 283         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 284         struct intel_dp *intel_dp = &intel_dig_port->dp;
 285         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 286         enum port port = intel_dig_port->base.port;
 287
 288         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 289
 290         if (intel_wait_for_register(dev_priv,
 291                                     DP_TP_STATUS(port),
 292                                     DP_TP_STATUS_ACT_SENT,
 293                                     DP_TP_STATUS_ACT_SENT,
 294                                     1))
 295                 DRM_ERROR("Timed out waiting for ACT sent\n");
 296
 297         drm_dp_check_act_status(&intel_dp->mst_mgr);
 298
 299         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 300         if (pipe_config->has_audio)
 301                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 302 }
 303
 304 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 305                                       enum pipe *pipe)
 306 {
 307         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 308         *pipe = intel_mst->pipe;
 309         if (intel_mst->connector)
 310                 return true;
 311         return false;
 312 }
 313
 314 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 315                                         struct intel_crtc_state *pipe_config)
 316 {
 317         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 318         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 319
 320         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 321 }
 322
 323 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 324 {
 325         struct intel_connector *intel_connector = to_intel_connector(connector);
 326         struct intel_dp *intel_dp = intel_connector->mst_port;
 327         struct edid *edid;
 328         int ret;
 329
 330         if (drm_connector_is_unregistered(connector))
 331                 return intel_connector_update_modes(connector, NULL);
 332
 333         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 334         ret = intel_connector_update_modes(connector, edid);
 335         kfree(edid);
 336
 337         return ret;
 338 }
 339
 340 static enum drm_connector_status
 341 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 342 {
 343         struct intel_connector *intel_connector = to_intel_connector(connector);
 344         struct intel_dp *intel_dp = intel_connector->mst_port;
 345
 346         if (drm_connector_is_unregistered(connector))
 347                 return connector_status_disconnected;
 348         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 349                                       intel_connector->port);
 350 }
 351
 352 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 353         .detect = intel_dp_mst_detect,
 354         .fill_modes = drm_helper_probe_single_connector_modes,
 355         .late_register = intel_connector_register,
 356         .early_unregister = intel_connector_unregister,
 357         .destroy = intel_connector_destroy,
 358         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 359         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 360 };
 361
 362 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 363 {
 364         return intel_dp_mst_get_ddc_modes(connector);
 365 }
 366
 367 static enum drm_mode_status
 368 intel_dp_mst_mode_valid(struct drm_connector *connector,
 369                         struct drm_display_mode *mode)
 370 {
 371         struct intel_connector *intel_connector = to_intel_connector(connector);
 372         struct intel_dp *intel_dp = intel_connector->mst_port;
 373         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 374         int bpp = 24; /* MST uses fixed bpp */
 375         int max_rate, mode_rate, max_lanes, max_link_clock;
 376
 377         if (drm_connector_is_unregistered(connector))
 378                 return MODE_ERROR;
 379
 380         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 381                 return MODE_NO_DBLESCAN;
 382
 383         max_link_clock = intel_dp_max_link_rate(intel_dp);
 384         max_lanes = intel_dp_max_lane_count(intel_dp);
 385
 386         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 387         mode_rate = intel_dp_link_required(mode->clock, bpp);
 388
 389         /* TODO - validate mode against available PBN for link */
 390         if (mode->clock < 10000)
 391                 return MODE_CLOCK_LOW;
 392
 393         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 394                 return MODE_H_ILLEGAL;
 395
 396         if (mode_rate > max_rate || mode->clock > max_dotclk)
 397                 return MODE_CLOCK_HIGH;
 398
 399         return MODE_OK;
 400 }
 401
 402 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 403                                                          struct drm_connector_state *state)
 404 {
 405         struct intel_connector *intel_connector = to_intel_connector(connector);
 406         struct intel_dp *intel_dp = intel_connector->mst_port;
 407         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 408
 409         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 410 }
 411
 412 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 413         .get_modes = intel_dp_mst_get_modes,
 414         .mode_valid = intel_dp_mst_mode_valid,
 415         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 416         .atomic_check = intel_dp_mst_atomic_check,
 417 };
 418
 419 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 420 {
 421         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 422
 423         drm_encoder_cleanup(encoder);
 424         kfree(intel_mst);
 425 }
 426
 427 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 428         .destroy = intel_dp_mst_encoder_destroy,
 429 };
 430
 431 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 432 {
 433         if (connector->encoder && connector->base.state->crtc) {
 434                 enum pipe pipe;
 435                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 436                         return false;
 437                 return true;
 438         }
 439         return false;
 440 }
 441
 442 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)
 443 {
 444         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 445         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 446         struct drm_device *dev = intel_dig_port->base.base.dev;
 447         struct drm_i915_private *dev_priv = to_i915(dev);
 448         struct intel_connector *intel_connector;
 449         struct drm_connector *connector;
 450         enum pipe pipe;
 451         int ret;
 452
 453         intel_connector = intel_connector_alloc();
 454         if (!intel_connector)
 455                 return NULL;
 456
 457         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 458         intel_connector->mst_port = intel_dp;
 459         intel_connector->port = port;
 460
 461         connector = &intel_connector->base;
 462         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 463                                  DRM_MODE_CONNECTOR_DisplayPort);
 464         if (ret) {
 465                 intel_connector_free(intel_connector);
 466                 return NULL;
 467         }
 468
 469         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 470
 471         for_each_pipe(dev_priv, pipe) {
 472                 struct drm_encoder *enc =
 473                         &intel_dp->mst_encoders[pipe]->base.base;
 474
 475                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 476                 if (ret)
 477                         goto err;
 478         }
 479
 480         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 481         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 482
 483         ret = drm_connector_set_path_property(connector, pathprop);
 484         if (ret)
 485                 goto err;
 486
 487         return connector;
 488
 489 err:
 490         drm_connector_cleanup(connector);
 491         return NULL;
 492 }
 493
 494 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 495 {
 496         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 497
 498         if (dev_priv->fbdev)
 499                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 500                                                 connector);
 501
 502         drm_connector_register(connector);
 503 }
 504
 505 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 506                                            struct drm_connector *connector)
 507 {
 508         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 509
 510         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 511         drm_connector_unregister(connector);
 512
 513         if (dev_priv->fbdev)
 514                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 515                                                    connector);
 516
 517         drm_connector_put(connector);
 518 }
 519
 520 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 521 {
 522         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 523         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 524         struct drm_device *dev = intel_dig_port->base.base.dev;
 525
 526         drm_kms_helper_hotplug_event(dev);
 527 }
 528
 529 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 530         .add_connector = intel_dp_add_mst_connector,
 531         .register_connector = intel_dp_register_mst_connector,
 532         .destroy_connector = intel_dp_destroy_mst_connector,
 533         .hotplug = intel_dp_mst_hotplug,
 534 };
 535
 536 static struct intel_dp_mst_encoder *
 537 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 538 {
 539         struct intel_dp_mst_encoder *intel_mst;
 540         struct intel_encoder *intel_encoder;
 541         struct drm_device *dev = intel_dig_port->base.base.dev;
 542
 543         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 544
 545         if (!intel_mst)
 546                 return NULL;
 547
 548         intel_mst->pipe = pipe;
 549         intel_encoder = &intel_mst->base;
 550         intel_mst->primary = intel_dig_port;
 551
 552         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 553                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 554
 555         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 556         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 557         intel_encoder->port = intel_dig_port->base.port;
 558         intel_encoder->crtc_mask = 0x7;
 559         intel_encoder->cloneable = 0;
 560
 561         intel_encoder->compute_config = intel_dp_mst_compute_config;
 562         intel_encoder->disable = intel_mst_disable_dp;
 563         intel_encoder->post_disable = intel_mst_post_disable_dp;
 564         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 565         intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
 566         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 567         intel_encoder->enable = intel_mst_enable_dp;
 568         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 569         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 570
 571         return intel_mst;
 572
 573 }
 574
 575 static bool
 576 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 577 {
 578         struct intel_dp *intel_dp = &intel_dig_port->dp;
 579         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 580         enum pipe pipe;
 581
 582         for_each_pipe(dev_priv, pipe)
 583                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 584         return true;
 585 }
 586
 587 int
 588 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 589 {
 590         struct intel_dp *intel_dp = &intel_dig_port->dp;
 591         struct drm_device *dev = intel_dig_port->base.base.dev;
 592         int ret;
 593
 594         intel_dp->can_mst = true;
 595         intel_dp->mst_mgr.cbs = &mst_cbs;
 596
 597         /* create encoders */
 598         intel_dp_create_fake_mst_encoders(intel_dig_port);
 599         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 600                                            &intel_dp->aux, 16, 3, conn_base_id);
 601         if (ret) {
 602                 intel_dp->can_mst = false;
 603                 return ret;
 604         }
 605         return 0;
 606 }
 607
 608 void
 609 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 610 {
 611         struct intel_dp *intel_dp = &intel_dig_port->dp;
 612
 613         if (!intel_dp->can_mst)
 614                 return;
 615
 616         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 617         /* encoders will get killed by normal cleanup */
 618 }