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_edid.h>
  30 #include <drm/drm_probe_helper.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         slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr, port,
  84                                               mst_pbn);
  85         if (slots < 0) {
  86                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
  87                               slots);
  88                 return slots;
  89         }
  90
  91         intel_link_compute_m_n(bpp, lane_count,
  92                                adjusted_mode->crtc_clock,
  93                                pipe_config->port_clock,
  94                                &pipe_config->dp_m_n,
  95                                constant_n);
  96
  97         pipe_config->dp_m_n.tu = slots;
  98
  99         if (IS_GEN9_LP(dev_priv))
 100                 pipe_config->lane_lat_optim_mask =
 101                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 102
 103         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 104
 105         return 0;
 106 }
 107
 108 static int
 109 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                 drm_atomic_get_old_connector_state(state, connector);
 115         struct intel_connector *intel_connector =
 116                 to_intel_connector(connector);
 117         struct drm_crtc *new_crtc = new_conn_state->crtc;
 118         struct drm_crtc_state *crtc_state;
 119         struct drm_dp_mst_topology_mgr *mgr;
 120         int ret = 0;
 121
 122         if (!old_conn_state->crtc)
 123                 return 0;
 124
 125         /* We only want to free VCPI if this state disables the CRTC on this
 126          * connector
 127          */
 128         if (new_crtc) {
 129                 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
 130
 131                 if (!crtc_state ||
 132                     !drm_atomic_crtc_needs_modeset(crtc_state) ||
 133                     crtc_state->enable)
 134                         return 0;
 135         }
 136
 137         mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
 138         ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
 139                                                intel_connector->port);
 140
 141         return ret;
 142 }
 143
 144 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 145                                  const struct intel_crtc_state *old_crtc_state,
 146                                  const struct drm_connector_state *old_conn_state)
 147 {
 148         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 149         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 150         struct intel_dp *intel_dp = &intel_dig_port->dp;
 151         struct intel_connector *connector =
 152                 to_intel_connector(old_conn_state->connector);
 153         int ret;
 154
 155         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 156
 157         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 158
 159         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 160         if (ret) {
 161                 DRM_ERROR("failed to update payload %d\n", ret);
 162         }
 163         if (old_crtc_state->has_audio)
 164                 intel_audio_codec_disable(encoder,
 165                                           old_crtc_state, old_conn_state);
 166 }
 167
 168 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 169                                       const struct intel_crtc_state *old_crtc_state,
 170                                       const struct drm_connector_state *old_conn_state)
 171 {
 172         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 173         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 174         struct intel_dp *intel_dp = &intel_dig_port->dp;
 175         struct intel_connector *connector =
 176                 to_intel_connector(old_conn_state->connector);
 177
 178         intel_ddi_disable_pipe_clock(old_crtc_state);
 179
 180         /* this can fail */
 181         drm_dp_check_act_status(&intel_dp->mst_mgr);
 182         /* and this can also fail */
 183         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 184
 185         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 186
 187         /*
 188          * Power down mst path before disabling the port, otherwise we end
 189          * up getting interrupts from the sink upon detecting link loss.
 190          */
 191         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 192                                      false);
 193
 194         intel_dp->active_mst_links--;
 195
 196         intel_mst->connector = NULL;
 197         if (intel_dp->active_mst_links == 0) {
 198                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 199                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 200                                                   old_crtc_state, NULL);
 201         }
 202
 203         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 204 }
 205
 206 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 207                                         const struct intel_crtc_state *pipe_config,
 208                                         const struct drm_connector_state *conn_state)
 209 {
 210         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 211         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 212         struct intel_dp *intel_dp = &intel_dig_port->dp;
 213
 214         if (intel_dp->active_mst_links == 0)
 215                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 216                                                     pipe_config, NULL);
 217 }
 218
 219 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 220                                           const struct intel_crtc_state *old_crtc_state,
 221                                           const struct drm_connector_state *old_conn_state)
 222 {
 223         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 224         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 225         struct intel_dp *intel_dp = &intel_dig_port->dp;
 226
 227         if (intel_dp->active_mst_links == 0)
 228                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 229                                                       old_crtc_state,
 230                                                       old_conn_state);
 231 }
 232
 233 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 234                                     const struct intel_crtc_state *pipe_config,
 235                                     const struct drm_connector_state *conn_state)
 236 {
 237         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 238         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 239         struct intel_dp *intel_dp = &intel_dig_port->dp;
 240         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 241         enum port port = intel_dig_port->base.port;
 242         struct intel_connector *connector =
 243                 to_intel_connector(conn_state->connector);
 244         int ret;
 245         u32 temp;
 246
 247         /* MST encoders are bound to a crtc, not to a connector,
 248          * force the mapping here for get_hw_state.
 249          */
 250         connector->encoder = encoder;
 251         intel_mst->connector = connector;
 252
 253         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 254
 255         if (intel_dp->active_mst_links == 0)
 256                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 257
 258         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 259
 260         if (intel_dp->active_mst_links == 0)
 261                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 262                                                 pipe_config, NULL);
 263
 264         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 265                                        connector->port,
 266                                        pipe_config->pbn,
 267                                        pipe_config->dp_m_n.tu);
 268         if (!ret)
 269                 DRM_ERROR("failed to allocate vcpi\n");
 270
 271         intel_dp->active_mst_links++;
 272         temp = I915_READ(DP_TP_STATUS(port));
 273         I915_WRITE(DP_TP_STATUS(port), temp);
 274
 275         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 276
 277         intel_ddi_enable_pipe_clock(pipe_config);
 278 }
 279
 280 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 281                                 const struct intel_crtc_state *pipe_config,
 282                                 const struct drm_connector_state *conn_state)
 283 {
 284         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 285         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 286         struct intel_dp *intel_dp = &intel_dig_port->dp;
 287         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 288         enum port port = intel_dig_port->base.port;
 289
 290         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 291
 292         if (intel_wait_for_register(&dev_priv->uncore,
 293                                     DP_TP_STATUS(port),
 294                                     DP_TP_STATUS_ACT_SENT,
 295                                     DP_TP_STATUS_ACT_SENT,
 296                                     1))
 297                 DRM_ERROR("Timed out waiting for ACT sent\n");
 298
 299         drm_dp_check_act_status(&intel_dp->mst_mgr);
 300
 301         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 302         if (pipe_config->has_audio)
 303                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 304 }
 305
 306 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 307                                       enum pipe *pipe)
 308 {
 309         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 310         *pipe = intel_mst->pipe;
 311         if (intel_mst->connector)
 312                 return true;
 313         return false;
 314 }
 315
 316 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 317                                         struct intel_crtc_state *pipe_config)
 318 {
 319         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 320         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 321
 322         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 323 }
 324
 325 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 326 {
 327         struct intel_connector *intel_connector = to_intel_connector(connector);
 328         struct intel_dp *intel_dp = intel_connector->mst_port;
 329         struct edid *edid;
 330         int ret;
 331
 332         if (drm_connector_is_unregistered(connector))
 333                 return intel_connector_update_modes(connector, NULL);
 334
 335         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 336         ret = intel_connector_update_modes(connector, edid);
 337         kfree(edid);
 338
 339         return ret;
 340 }
 341
 342 static enum drm_connector_status
 343 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 344 {
 345         struct intel_connector *intel_connector = to_intel_connector(connector);
 346         struct intel_dp *intel_dp = intel_connector->mst_port;
 347
 348         if (drm_connector_is_unregistered(connector))
 349                 return connector_status_disconnected;
 350         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 351                                       intel_connector->port);
 352 }
 353
 354 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 355         .detect = intel_dp_mst_detect,
 356         .fill_modes = drm_helper_probe_single_connector_modes,
 357         .late_register = intel_connector_register,
 358         .early_unregister = intel_connector_unregister,
 359         .destroy = intel_connector_destroy,
 360         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 361         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 362 };
 363
 364 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 365 {
 366         return intel_dp_mst_get_ddc_modes(connector);
 367 }
 368
 369 static enum drm_mode_status
 370 intel_dp_mst_mode_valid(struct drm_connector *connector,
 371                         struct drm_display_mode *mode)
 372 {
 373         struct intel_connector *intel_connector = to_intel_connector(connector);
 374         struct intel_dp *intel_dp = intel_connector->mst_port;
 375         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 376         int bpp = 24; /* MST uses fixed bpp */
 377         int max_rate, mode_rate, max_lanes, max_link_clock;
 378
 379         if (drm_connector_is_unregistered(connector))
 380                 return MODE_ERROR;
 381
 382         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 383                 return MODE_NO_DBLESCAN;
 384
 385         max_link_clock = intel_dp_max_link_rate(intel_dp);
 386         max_lanes = intel_dp_max_lane_count(intel_dp);
 387
 388         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 389         mode_rate = intel_dp_link_required(mode->clock, bpp);
 390
 391         /* TODO - validate mode against available PBN for link */
 392         if (mode->clock < 10000)
 393                 return MODE_CLOCK_LOW;
 394
 395         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 396                 return MODE_H_ILLEGAL;
 397
 398         if (mode_rate > max_rate || mode->clock > max_dotclk)
 399                 return MODE_CLOCK_HIGH;
 400
 401         return MODE_OK;
 402 }
 403
 404 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 405                                                          struct drm_connector_state *state)
 406 {
 407         struct intel_connector *intel_connector = to_intel_connector(connector);
 408         struct intel_dp *intel_dp = intel_connector->mst_port;
 409         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 410
 411         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 412 }
 413
 414 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 415         .get_modes = intel_dp_mst_get_modes,
 416         .mode_valid = intel_dp_mst_mode_valid,
 417         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 418         .atomic_check = intel_dp_mst_atomic_check,
 419 };
 420
 421 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 422 {
 423         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 424
 425         drm_encoder_cleanup(encoder);
 426         kfree(intel_mst);
 427 }
 428
 429 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 430         .destroy = intel_dp_mst_encoder_destroy,
 431 };
 432
 433 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 434 {
 435         if (connector->encoder && connector->base.state->crtc) {
 436                 enum pipe pipe;
 437                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 438                         return false;
 439                 return true;
 440         }
 441         return false;
 442 }
 443
 444 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)
 445 {
 446         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 447         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 448         struct drm_device *dev = intel_dig_port->base.base.dev;
 449         struct drm_i915_private *dev_priv = to_i915(dev);
 450         struct intel_connector *intel_connector;
 451         struct drm_connector *connector;
 452         enum pipe pipe;
 453         int ret;
 454
 455         intel_connector = intel_connector_alloc();
 456         if (!intel_connector)
 457                 return NULL;
 458
 459         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 460         intel_connector->mst_port = intel_dp;
 461         intel_connector->port = port;
 462         drm_dp_mst_get_port_malloc(port);
 463
 464         connector = &intel_connector->base;
 465         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 466                                  DRM_MODE_CONNECTOR_DisplayPort);
 467         if (ret) {
 468                 intel_connector_free(intel_connector);
 469                 return NULL;
 470         }
 471
 472         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 473
 474         for_each_pipe(dev_priv, pipe) {
 475                 struct drm_encoder *enc =
 476                         &intel_dp->mst_encoders[pipe]->base.base;
 477
 478                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 479                 if (ret)
 480                         goto err;
 481         }
 482
 483         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 484         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 485
 486         ret = drm_connector_set_path_property(connector, pathprop);
 487         if (ret)
 488                 goto err;
 489
 490         return connector;
 491
 492 err:
 493         drm_connector_cleanup(connector);
 494         return NULL;
 495 }
 496
 497 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 498 {
 499         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 500
 501         if (dev_priv->fbdev)
 502                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 503                                                 connector);
 504
 505         drm_connector_register(connector);
 506 }
 507
 508 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 509                                            struct drm_connector *connector)
 510 {
 511         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 512
 513         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 514         drm_connector_unregister(connector);
 515
 516         if (dev_priv->fbdev)
 517                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 518                                                    connector);
 519
 520         drm_connector_put(connector);
 521 }
 522
 523 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 524         .add_connector = intel_dp_add_mst_connector,
 525         .register_connector = intel_dp_register_mst_connector,
 526         .destroy_connector = intel_dp_destroy_mst_connector,
 527 };
 528
 529 static struct intel_dp_mst_encoder *
 530 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 531 {
 532         struct intel_dp_mst_encoder *intel_mst;
 533         struct intel_encoder *intel_encoder;
 534         struct drm_device *dev = intel_dig_port->base.base.dev;
 535
 536         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 537
 538         if (!intel_mst)
 539                 return NULL;
 540
 541         intel_mst->pipe = pipe;
 542         intel_encoder = &intel_mst->base;
 543         intel_mst->primary = intel_dig_port;
 544
 545         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 546                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 547
 548         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 549         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 550         intel_encoder->port = intel_dig_port->base.port;
 551         intel_encoder->crtc_mask = 0x7;
 552         intel_encoder->cloneable = 0;
 553
 554         intel_encoder->compute_config = intel_dp_mst_compute_config;
 555         intel_encoder->disable = intel_mst_disable_dp;
 556         intel_encoder->post_disable = intel_mst_post_disable_dp;
 557         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 558         intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
 559         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 560         intel_encoder->enable = intel_mst_enable_dp;
 561         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 562         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 563
 564         return intel_mst;
 565
 566 }
 567
 568 static bool
 569 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 570 {
 571         struct intel_dp *intel_dp = &intel_dig_port->dp;
 572         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 573         enum pipe pipe;
 574
 575         for_each_pipe(dev_priv, pipe)
 576                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 577         return true;
 578 }
 579
 580 int
 581 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 582 {
 583         struct intel_dp *intel_dp = &intel_dig_port->dp;
 584         struct drm_device *dev = intel_dig_port->base.base.dev;
 585         int ret;
 586
 587         intel_dp->can_mst = true;
 588         intel_dp->mst_mgr.cbs = &mst_cbs;
 589
 590         /* create encoders */
 591         intel_dp_create_fake_mst_encoders(intel_dig_port);
 592         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 593                                            &intel_dp->aux, 16, 3, conn_base_id);
 594         if (ret) {
 595                 intel_dp->can_mst = false;
 596                 return ret;
 597         }
 598         return 0;
 599 }
 600
 601 void
 602 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 603 {
 604         struct intel_dp *intel_dp = &intel_dig_port->dp;
 605
 606         if (!intel_dp->can_mst)
 607                 return;
 608
 609         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 610         /* encoders will get killed by normal cleanup */
 611 }