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         pipe_config->has_pch_encoder = false;
  52         bpp = 24;
  53         if (intel_dp->compliance.test_data.bpc) {
  54                 bpp = intel_dp->compliance.test_data.bpc * 3;
  55                 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
  56                               bpp);
  57         }
  58         /*
  59          * for MST we always configure max link bw - the spec doesn't
  60          * seem to suggest we should do otherwise.
  61          */
  62         lane_count = intel_dp_max_lane_count(intel_dp);
  63
  64         pipe_config->lane_count = lane_count;
  65
  66         pipe_config->pipe_bpp = bpp;
  67
  68         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  69
  70         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
  71                 pipe_config->has_audio = true;
  72
  73         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  74         pipe_config->pbn = mst_pbn;
  75
  76         slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  77                                               connector->port, mst_pbn);
  78         if (slots < 0) {
  79                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  80                 return false;
  81         }
  82
  83         intel_link_compute_m_n(bpp, lane_count,
  84                                adjusted_mode->crtc_clock,
  85                                pipe_config->port_clock,
  86                                &pipe_config->dp_m_n,
  87                                reduce_m_n);
  88
  89         pipe_config->dp_m_n.tu = slots;
  90
  91         if (IS_GEN9_LP(dev_priv))
  92                 pipe_config->lane_lat_optim_mask =
  93                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
  94
  95         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
  96
  97         return true;
  98 }
  99
 100 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
 101                 struct drm_connector_state *new_conn_state)
 102 {
 103         struct drm_atomic_state *state = new_conn_state->state;
 104         struct drm_connector_state *old_conn_state;
 105         struct drm_crtc *old_crtc;
 106         struct drm_crtc_state *crtc_state;
 107         int slots, ret = 0;
 108
 109         old_conn_state = drm_atomic_get_old_connector_state(state, connector);
 110         old_crtc = old_conn_state->crtc;
 111         if (!old_crtc)
 112                 return ret;
 113
 114         crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 115         slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
 116         if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
 117                 struct drm_dp_mst_topology_mgr *mgr;
 118                 struct drm_encoder *old_encoder;
 119
 120                 old_encoder = old_conn_state->best_encoder;
 121                 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
 122
 123                 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
 124                 if (ret)
 125                         DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
 126                 else
 127                         to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 128         }
 129         return ret;
 130 }
 131
 132 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 133                                  const struct intel_crtc_state *old_crtc_state,
 134                                  const struct drm_connector_state *old_conn_state)
 135 {
 136         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 137         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 138         struct intel_dp *intel_dp = &intel_dig_port->dp;
 139         struct intel_connector *connector =
 140                 to_intel_connector(old_conn_state->connector);
 141         int ret;
 142
 143         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 144
 145         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 146
 147         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 148         if (ret) {
 149                 DRM_ERROR("failed to update payload %d\n", ret);
 150         }
 151         if (old_crtc_state->has_audio)
 152                 intel_audio_codec_disable(encoder,
 153                                           old_crtc_state, old_conn_state);
 154 }
 155
 156 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 157                                       const struct intel_crtc_state *old_crtc_state,
 158                                       const struct drm_connector_state *old_conn_state)
 159 {
 160         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 161         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 162         struct intel_dp *intel_dp = &intel_dig_port->dp;
 163         struct intel_connector *connector =
 164                 to_intel_connector(old_conn_state->connector);
 165
 166         /* this can fail */
 167         drm_dp_check_act_status(&intel_dp->mst_mgr);
 168         /* and this can also fail */
 169         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 170
 171         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 172
 173         /*
 174          * Power down mst path before disabling the port, otherwise we end
 175          * up getting interrupts from the sink upon detecting link loss.
 176          */
 177         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 178                                      false);
 179
 180         intel_dp->active_mst_links--;
 181
 182         intel_mst->connector = NULL;
 183         if (intel_dp->active_mst_links == 0) {
 184                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 185                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 186                                                   old_crtc_state, NULL);
 187         }
 188
 189         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 190 }
 191
 192 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 193                                         const struct intel_crtc_state *pipe_config,
 194                                         const struct drm_connector_state *conn_state)
 195 {
 196         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 197         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 198         struct intel_dp *intel_dp = &intel_dig_port->dp;
 199
 200         if (intel_dp->active_mst_links == 0 &&
 201             intel_dig_port->base.pre_pll_enable)
 202                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 203                                                     pipe_config, NULL);
 204 }
 205
 206 static void intel_mst_pre_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         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 214         enum port port = intel_dig_port->base.port;
 215         struct intel_connector *connector =
 216                 to_intel_connector(conn_state->connector);
 217         int ret;
 218         uint32_t temp;
 219
 220         /* MST encoders are bound to a crtc, not to a connector,
 221          * force the mapping here for get_hw_state.
 222          */
 223         connector->encoder = encoder;
 224         intel_mst->connector = connector;
 225
 226         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 227
 228         if (intel_dp->active_mst_links == 0)
 229                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 230
 231         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 232
 233         if (intel_dp->active_mst_links == 0)
 234                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 235                                                 pipe_config, NULL);
 236
 237         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 238                                        connector->port,
 239                                        pipe_config->pbn,
 240                                        pipe_config->dp_m_n.tu);
 241         if (ret == false) {
 242                 DRM_ERROR("failed to allocate vcpi\n");
 243                 return;
 244         }
 245
 246
 247         intel_dp->active_mst_links++;
 248         temp = I915_READ(DP_TP_STATUS(port));
 249         I915_WRITE(DP_TP_STATUS(port), temp);
 250
 251         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 252 }
 253
 254 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 255                                 const struct intel_crtc_state *pipe_config,
 256                                 const struct drm_connector_state *conn_state)
 257 {
 258         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 259         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 260         struct intel_dp *intel_dp = &intel_dig_port->dp;
 261         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 262         enum port port = intel_dig_port->base.port;
 263         int ret;
 264
 265         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 266
 267         if (intel_wait_for_register(dev_priv,
 268                                     DP_TP_STATUS(port),
 269                                     DP_TP_STATUS_ACT_SENT,
 270                                     DP_TP_STATUS_ACT_SENT,
 271                                     1))
 272                 DRM_ERROR("Timed out waiting for ACT sent\n");
 273
 274         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 275
 276         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 277         if (pipe_config->has_audio)
 278                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 279 }
 280
 281 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 282                                       enum pipe *pipe)
 283 {
 284         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 285         *pipe = intel_mst->pipe;
 286         if (intel_mst->connector)
 287                 return true;
 288         return false;
 289 }
 290
 291 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 292                                         struct intel_crtc_state *pipe_config)
 293 {
 294         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 295         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 296
 297         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 298 }
 299
 300 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 301 {
 302         struct intel_connector *intel_connector = to_intel_connector(connector);
 303         struct intel_dp *intel_dp = intel_connector->mst_port;
 304         struct edid *edid;
 305         int ret;
 306
 307         if (!intel_dp) {
 308                 return intel_connector_update_modes(connector, NULL);
 309         }
 310
 311         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 312         ret = intel_connector_update_modes(connector, edid);
 313         kfree(edid);
 314
 315         return ret;
 316 }
 317
 318 static enum drm_connector_status
 319 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 320 {
 321         struct intel_connector *intel_connector = to_intel_connector(connector);
 322         struct intel_dp *intel_dp = intel_connector->mst_port;
 323
 324         if (!intel_dp)
 325                 return connector_status_disconnected;
 326         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 327 }
 328
 329 static void
 330 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 331 {
 332         struct intel_connector *intel_connector = to_intel_connector(connector);
 333
 334         if (!IS_ERR_OR_NULL(intel_connector->edid))
 335                 kfree(intel_connector->edid);
 336
 337         drm_connector_cleanup(connector);
 338         kfree(connector);
 339 }
 340
 341 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 342         .detect = intel_dp_mst_detect,
 343         .fill_modes = drm_helper_probe_single_connector_modes,
 344         .late_register = intel_connector_register,
 345         .early_unregister = intel_connector_unregister,
 346         .destroy = intel_dp_mst_connector_destroy,
 347         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 348         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 349 };
 350
 351 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 352 {
 353         return intel_dp_mst_get_ddc_modes(connector);
 354 }
 355
 356 static enum drm_mode_status
 357 intel_dp_mst_mode_valid(struct drm_connector *connector,
 358                         struct drm_display_mode *mode)
 359 {
 360         struct intel_connector *intel_connector = to_intel_connector(connector);
 361         struct intel_dp *intel_dp = intel_connector->mst_port;
 362         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 363         int bpp = 24; /* MST uses fixed bpp */
 364         int max_rate, mode_rate, max_lanes, max_link_clock;
 365
 366         if (!intel_dp)
 367                 return MODE_ERROR;
 368
 369         max_link_clock = intel_dp_max_link_rate(intel_dp);
 370         max_lanes = intel_dp_max_lane_count(intel_dp);
 371
 372         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 373         mode_rate = intel_dp_link_required(mode->clock, bpp);
 374
 375         /* TODO - validate mode against available PBN for link */
 376         if (mode->clock < 10000)
 377                 return MODE_CLOCK_LOW;
 378
 379         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 380                 return MODE_H_ILLEGAL;
 381
 382         if (mode_rate > max_rate || mode->clock > max_dotclk)
 383                 return MODE_CLOCK_HIGH;
 384
 385         return MODE_OK;
 386 }
 387
 388 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 389                                                          struct drm_connector_state *state)
 390 {
 391         struct intel_connector *intel_connector = to_intel_connector(connector);
 392         struct intel_dp *intel_dp = intel_connector->mst_port;
 393         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 394
 395         if (!intel_dp)
 396                 return NULL;
 397         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 398 }
 399
 400 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
 401 {
 402         struct intel_connector *intel_connector = to_intel_connector(connector);
 403         struct intel_dp *intel_dp = intel_connector->mst_port;
 404         if (!intel_dp)
 405                 return NULL;
 406         return &intel_dp->mst_encoders[0]->base.base;
 407 }
 408
 409 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 410         .get_modes = intel_dp_mst_get_modes,
 411         .mode_valid = intel_dp_mst_mode_valid,
 412         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 413         .best_encoder = intel_mst_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_mode_connector_attach_encoder(&intel_connector->base,
 474                                                         enc);
 475                 if (ret)
 476                         goto err;
 477         }
 478
 479         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 480         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 481
 482         ret = drm_mode_connector_set_path_property(connector, pathprop);
 483         if (ret)
 484                 goto err;
 485
 486         return connector;
 487
 488 err:
 489         drm_connector_cleanup(connector);
 490         return NULL;
 491 }
 492
 493 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 494 {
 495         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 496
 497         if (dev_priv->fbdev)
 498                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 499                                                 connector);
 500
 501         drm_connector_register(connector);
 502 }
 503
 504 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 505                                            struct drm_connector *connector)
 506 {
 507         struct intel_connector *intel_connector = to_intel_connector(connector);
 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         /* prevent race with the check in ->detect */
 517         drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
 518         intel_connector->mst_port = NULL;
 519         drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
 520
 521         drm_connector_unreference(connector);
 522 }
 523
 524 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 525 {
 526         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 527         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 528         struct drm_device *dev = intel_dig_port->base.base.dev;
 529
 530         drm_kms_helper_hotplug_event(dev);
 531 }
 532
 533 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 534         .add_connector = intel_dp_add_mst_connector,
 535         .register_connector = intel_dp_register_mst_connector,
 536         .destroy_connector = intel_dp_destroy_mst_connector,
 537         .hotplug = intel_dp_mst_hotplug,
 538 };
 539
 540 static struct intel_dp_mst_encoder *
 541 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 542 {
 543         struct intel_dp_mst_encoder *intel_mst;
 544         struct intel_encoder *intel_encoder;
 545         struct drm_device *dev = intel_dig_port->base.base.dev;
 546
 547         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 548
 549         if (!intel_mst)
 550                 return NULL;
 551
 552         intel_mst->pipe = pipe;
 553         intel_encoder = &intel_mst->base;
 554         intel_mst->primary = intel_dig_port;
 555
 556         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 557                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 558
 559         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 560         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 561         intel_encoder->port = intel_dig_port->base.port;
 562         intel_encoder->crtc_mask = 0x7;
 563         intel_encoder->cloneable = 0;
 564
 565         intel_encoder->compute_config = intel_dp_mst_compute_config;
 566         intel_encoder->disable = intel_mst_disable_dp;
 567         intel_encoder->post_disable = intel_mst_post_disable_dp;
 568         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 569         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 570         intel_encoder->enable = intel_mst_enable_dp;
 571         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 572         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 573
 574         return intel_mst;
 575
 576 }
 577
 578 static bool
 579 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 580 {
 581         struct intel_dp *intel_dp = &intel_dig_port->dp;
 582         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 583         enum pipe pipe;
 584
 585         for_each_pipe(dev_priv, pipe)
 586                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 587         return true;
 588 }
 589
 590 int
 591 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 592 {
 593         struct intel_dp *intel_dp = &intel_dig_port->dp;
 594         struct drm_device *dev = intel_dig_port->base.base.dev;
 595         int ret;
 596
 597         intel_dp->can_mst = true;
 598         intel_dp->mst_mgr.cbs = &mst_cbs;
 599
 600         /* create encoders */
 601         intel_dp_create_fake_mst_encoders(intel_dig_port);
 602         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 603                                            &intel_dp->aux, 16, 3, conn_base_id);
 604         if (ret) {
 605                 intel_dp->can_mst = false;
 606                 return ret;
 607         }
 608         return 0;
 609 }
 610
 611 void
 612 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 613 {
 614         struct intel_dp *intel_dp = &intel_dig_port->dp;
 615
 616         if (!intel_dp->can_mst)
 617                 return;
 618
 619         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 620         /* encoders will get killed by normal cleanup */
 621 }