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 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 intel_connector *connector =
  41                 to_intel_connector(conn_state->connector);
  42         struct drm_atomic_state *state;
  43         int bpp;
  44         int lane_count, slots;
  45         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  46         int mst_pbn;
  47         bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
  48                                            DP_DPCD_QUIRK_LIMITED_M_N);
  49
  50         pipe_config->has_pch_encoder = false;
  51         bpp = 24;
  52         if (intel_dp->compliance.test_data.bpc) {
  53                 bpp = intel_dp->compliance.test_data.bpc * 3;
  54                 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
  55                               bpp);
  56         }
  57         /*
  58          * for MST we always configure max link bw - the spec doesn't
  59          * seem to suggest we should do otherwise.
  60          */
  61         lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
  62
  63         pipe_config->lane_count = lane_count;
  64
  65         pipe_config->pipe_bpp = bpp;
  66         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  67
  68         state = pipe_config->base.state;
  69
  70         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
  71                 pipe_config->has_audio = true;
  72         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  73
  74         pipe_config->pbn = mst_pbn;
  75         slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
  76
  77         intel_link_compute_m_n(bpp, lane_count,
  78                                adjusted_mode->crtc_clock,
  79                                pipe_config->port_clock,
  80                                &pipe_config->dp_m_n,
  81                                reduce_m_n);
  82
  83         pipe_config->dp_m_n.tu = slots;
  84
  85         return true;
  86
  87 }
  88
  89 static void intel_mst_disable_dp(struct intel_encoder *encoder,
  90                                  struct intel_crtc_state *old_crtc_state,
  91                                  struct drm_connector_state *old_conn_state)
  92 {
  93         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  94         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  95         struct intel_dp *intel_dp = &intel_dig_port->dp;
  96         struct intel_connector *connector =
  97                 to_intel_connector(old_conn_state->connector);
  98         int ret;
  99
 100         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 101
 102         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 103
 104         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 105         if (ret) {
 106                 DRM_ERROR("failed to update payload %d\n", ret);
 107         }
 108         if (old_crtc_state->has_audio)
 109                 intel_audio_codec_disable(encoder);
 110 }
 111
 112 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 113                                       struct intel_crtc_state *old_crtc_state,
 114                                       struct drm_connector_state *old_conn_state)
 115 {
 116         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 117         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 118         struct intel_dp *intel_dp = &intel_dig_port->dp;
 119         struct intel_connector *connector =
 120                 to_intel_connector(old_conn_state->connector);
 121
 122         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 123
 124         /* this can fail */
 125         drm_dp_check_act_status(&intel_dp->mst_mgr);
 126         /* and this can also fail */
 127         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 128
 129         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 130
 131         intel_dp->active_mst_links--;
 132
 133         intel_mst->connector = NULL;
 134         if (intel_dp->active_mst_links == 0) {
 135                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 136                                                   NULL, NULL);
 137
 138                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 139         }
 140 }
 141
 142 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 143                                     struct intel_crtc_state *pipe_config,
 144                                     struct drm_connector_state *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 drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 150         enum port port = intel_dig_port->port;
 151         struct intel_connector *connector =
 152                 to_intel_connector(conn_state->connector);
 153         int ret;
 154         uint32_t temp;
 155
 156         /* MST encoders are bound to a crtc, not to a connector,
 157          * force the mapping here for get_hw_state.
 158          */
 159         connector->encoder = encoder;
 160         intel_mst->connector = connector;
 161
 162         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 163
 164         if (intel_dp->active_mst_links == 0)
 165                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 166                                                 pipe_config, NULL);
 167
 168         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 169                                        connector->port,
 170                                        pipe_config->pbn,
 171                                        pipe_config->dp_m_n.tu);
 172         if (ret == false) {
 173                 DRM_ERROR("failed to allocate vcpi\n");
 174                 return;
 175         }
 176
 177
 178         intel_dp->active_mst_links++;
 179         temp = I915_READ(DP_TP_STATUS(port));
 180         I915_WRITE(DP_TP_STATUS(port), temp);
 181
 182         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 183 }
 184
 185 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 186                                 struct intel_crtc_state *pipe_config,
 187                                 struct drm_connector_state *conn_state)
 188 {
 189         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 190         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 191         struct intel_dp *intel_dp = &intel_dig_port->dp;
 192         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 193         enum port port = intel_dig_port->port;
 194         int ret;
 195
 196         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 197
 198         if (intel_wait_for_register(dev_priv,
 199                                     DP_TP_STATUS(port),
 200                                     DP_TP_STATUS_ACT_SENT,
 201                                     DP_TP_STATUS_ACT_SENT,
 202                                     1))
 203                 DRM_ERROR("Timed out waiting for ACT sent\n");
 204
 205         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 206
 207         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 208         if (pipe_config->has_audio)
 209                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 210 }
 211
 212 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 213                                       enum pipe *pipe)
 214 {
 215         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 216         *pipe = intel_mst->pipe;
 217         if (intel_mst->connector)
 218                 return true;
 219         return false;
 220 }
 221
 222 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 223                                         struct intel_crtc_state *pipe_config)
 224 {
 225         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 226         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 227         struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
 228         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 229         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 230         u32 temp, flags = 0;
 231
 232         pipe_config->has_audio =
 233                 intel_ddi_is_audio_enabled(dev_priv, crtc);
 234
 235         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
 236         if (temp & TRANS_DDI_PHSYNC)
 237                 flags |= DRM_MODE_FLAG_PHSYNC;
 238         else
 239                 flags |= DRM_MODE_FLAG_NHSYNC;
 240         if (temp & TRANS_DDI_PVSYNC)
 241                 flags |= DRM_MODE_FLAG_PVSYNC;
 242         else
 243                 flags |= DRM_MODE_FLAG_NVSYNC;
 244
 245         switch (temp & TRANS_DDI_BPC_MASK) {
 246         case TRANS_DDI_BPC_6:
 247                 pipe_config->pipe_bpp = 18;
 248                 break;
 249         case TRANS_DDI_BPC_8:
 250                 pipe_config->pipe_bpp = 24;
 251                 break;
 252         case TRANS_DDI_BPC_10:
 253                 pipe_config->pipe_bpp = 30;
 254                 break;
 255         case TRANS_DDI_BPC_12:
 256                 pipe_config->pipe_bpp = 36;
 257                 break;
 258         default:
 259                 break;
 260         }
 261         pipe_config->base.adjusted_mode.flags |= flags;
 262
 263         pipe_config->lane_count =
 264                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
 265
 266         intel_dp_get_m_n(crtc, pipe_config);
 267
 268         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 269 }
 270
 271 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 272 {
 273         struct intel_connector *intel_connector = to_intel_connector(connector);
 274         struct intel_dp *intel_dp = intel_connector->mst_port;
 275         struct edid *edid;
 276         int ret;
 277
 278         if (!intel_dp) {
 279                 return intel_connector_update_modes(connector, NULL);
 280         }
 281
 282         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 283         ret = intel_connector_update_modes(connector, edid);
 284         kfree(edid);
 285
 286         return ret;
 287 }
 288
 289 static enum drm_connector_status
 290 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 291 {
 292         struct intel_connector *intel_connector = to_intel_connector(connector);
 293         struct intel_dp *intel_dp = intel_connector->mst_port;
 294
 295         if (!intel_dp)
 296                 return connector_status_disconnected;
 297         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 298 }
 299
 300 static int
 301 intel_dp_mst_set_property(struct drm_connector *connector,
 302                           struct drm_property *property,
 303                           uint64_t val)
 304 {
 305         return 0;
 306 }
 307
 308 static void
 309 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 310 {
 311         struct intel_connector *intel_connector = to_intel_connector(connector);
 312
 313         if (!IS_ERR_OR_NULL(intel_connector->edid))
 314                 kfree(intel_connector->edid);
 315
 316         drm_connector_cleanup(connector);
 317         kfree(connector);
 318 }
 319
 320 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 321         .dpms = drm_atomic_helper_connector_dpms,
 322         .detect = intel_dp_mst_detect,
 323         .fill_modes = drm_helper_probe_single_connector_modes,
 324         .set_property = intel_dp_mst_set_property,
 325         .atomic_get_property = intel_connector_atomic_get_property,
 326         .late_register = intel_connector_register,
 327         .early_unregister = intel_connector_unregister,
 328         .destroy = intel_dp_mst_connector_destroy,
 329         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 330         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 331 };
 332
 333 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 334 {
 335         return intel_dp_mst_get_ddc_modes(connector);
 336 }
 337
 338 static enum drm_mode_status
 339 intel_dp_mst_mode_valid(struct drm_connector *connector,
 340                         struct drm_display_mode *mode)
 341 {
 342         struct intel_connector *intel_connector = to_intel_connector(connector);
 343         struct intel_dp *intel_dp = intel_connector->mst_port;
 344         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 345         int bpp = 24; /* MST uses fixed bpp */
 346         int max_rate, mode_rate, max_lanes, max_link_clock;
 347
 348         max_link_clock = intel_dp_max_link_rate(intel_dp);
 349         max_lanes = drm_dp_max_lane_count(intel_dp->dpcd);
 350
 351         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 352         mode_rate = intel_dp_link_required(mode->clock, bpp);
 353
 354         /* TODO - validate mode against available PBN for link */
 355         if (mode->clock < 10000)
 356                 return MODE_CLOCK_LOW;
 357
 358         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 359                 return MODE_H_ILLEGAL;
 360
 361         if (mode_rate > max_rate || mode->clock > max_dotclk)
 362                 return MODE_CLOCK_HIGH;
 363
 364         return MODE_OK;
 365 }
 366
 367 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 368                                                          struct drm_connector_state *state)
 369 {
 370         struct intel_connector *intel_connector = to_intel_connector(connector);
 371         struct intel_dp *intel_dp = intel_connector->mst_port;
 372         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 373
 374         if (!intel_dp)
 375                 return NULL;
 376         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 377 }
 378
 379 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
 380 {
 381         struct intel_connector *intel_connector = to_intel_connector(connector);
 382         struct intel_dp *intel_dp = intel_connector->mst_port;
 383         if (!intel_dp)
 384                 return NULL;
 385         return &intel_dp->mst_encoders[0]->base.base;
 386 }
 387
 388 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 389         .get_modes = intel_dp_mst_get_modes,
 390         .mode_valid = intel_dp_mst_mode_valid,
 391         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 392         .best_encoder = intel_mst_best_encoder,
 393 };
 394
 395 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 396 {
 397         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 398
 399         drm_encoder_cleanup(encoder);
 400         kfree(intel_mst);
 401 }
 402
 403 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 404         .destroy = intel_dp_mst_encoder_destroy,
 405 };
 406
 407 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 408 {
 409         if (connector->encoder && connector->base.state->crtc) {
 410                 enum pipe pipe;
 411                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 412                         return false;
 413                 return true;
 414         }
 415         return false;
 416 }
 417
 418 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
 419 {
 420 #ifdef CONFIG_DRM_FBDEV_EMULATION
 421         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 422
 423         if (dev_priv->fbdev)
 424                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 425                                                 &connector->base);
 426 #endif
 427 }
 428
 429 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
 430 {
 431 #ifdef CONFIG_DRM_FBDEV_EMULATION
 432         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 433
 434         if (dev_priv->fbdev)
 435                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 436                                                    &connector->base);
 437 #endif
 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 intel_connector *intel_connector;
 446         struct drm_connector *connector;
 447         int i;
 448
 449         intel_connector = intel_connector_alloc();
 450         if (!intel_connector)
 451                 return NULL;
 452
 453         connector = &intel_connector->base;
 454         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 455         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 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         for (i = PIPE_A; i <= PIPE_C; i++) {
 462                 drm_mode_connector_attach_encoder(&intel_connector->base,
 463                                                   &intel_dp->mst_encoders[i]->base.base);
 464         }
 465         intel_dp_add_properties(intel_dp, connector);
 466
 467         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 468         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 469
 470         drm_mode_connector_set_path_property(connector, pathprop);
 471         return connector;
 472 }
 473
 474 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 475 {
 476         struct intel_connector *intel_connector = to_intel_connector(connector);
 477         struct drm_device *dev = connector->dev;
 478
 479         drm_modeset_lock_all(dev);
 480         intel_connector_add_to_fbdev(intel_connector);
 481         drm_modeset_unlock_all(dev);
 482
 483         drm_connector_register(&intel_connector->base);
 484 }
 485
 486 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 487                                            struct drm_connector *connector)
 488 {
 489         struct intel_connector *intel_connector = to_intel_connector(connector);
 490         struct drm_device *dev = connector->dev;
 491
 492         drm_connector_unregister(connector);
 493
 494         /* need to nuke the connector */
 495         drm_modeset_lock_all(dev);
 496         intel_connector_remove_from_fbdev(intel_connector);
 497         intel_connector->mst_port = NULL;
 498         drm_modeset_unlock_all(dev);
 499
 500         drm_connector_unreference(&intel_connector->base);
 501         DRM_DEBUG_KMS("\n");
 502 }
 503
 504 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 505 {
 506         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 507         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 508         struct drm_device *dev = intel_dig_port->base.base.dev;
 509
 510         drm_kms_helper_hotplug_event(dev);
 511 }
 512
 513 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 514         .add_connector = intel_dp_add_mst_connector,
 515         .register_connector = intel_dp_register_mst_connector,
 516         .destroy_connector = intel_dp_destroy_mst_connector,
 517         .hotplug = intel_dp_mst_hotplug,
 518 };
 519
 520 static struct intel_dp_mst_encoder *
 521 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 522 {
 523         struct intel_dp_mst_encoder *intel_mst;
 524         struct intel_encoder *intel_encoder;
 525         struct drm_device *dev = intel_dig_port->base.base.dev;
 526
 527         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 528
 529         if (!intel_mst)
 530                 return NULL;
 531
 532         intel_mst->pipe = pipe;
 533         intel_encoder = &intel_mst->base;
 534         intel_mst->primary = intel_dig_port;
 535
 536         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 537                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 538
 539         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 540         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 541         intel_encoder->port = intel_dig_port->port;
 542         intel_encoder->crtc_mask = 0x7;
 543         intel_encoder->cloneable = 0;
 544
 545         intel_encoder->compute_config = intel_dp_mst_compute_config;
 546         intel_encoder->disable = intel_mst_disable_dp;
 547         intel_encoder->post_disable = intel_mst_post_disable_dp;
 548         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 549         intel_encoder->enable = intel_mst_enable_dp;
 550         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 551         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 552
 553         return intel_mst;
 554
 555 }
 556
 557 static bool
 558 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 559 {
 560         int i;
 561         struct intel_dp *intel_dp = &intel_dig_port->dp;
 562
 563         for (i = PIPE_A; i <= PIPE_C; i++)
 564                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
 565         return true;
 566 }
 567
 568 int
 569 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 570 {
 571         struct intel_dp *intel_dp = &intel_dig_port->dp;
 572         struct drm_device *dev = intel_dig_port->base.base.dev;
 573         int ret;
 574
 575         intel_dp->can_mst = true;
 576         intel_dp->mst_mgr.cbs = &mst_cbs;
 577
 578         /* create encoders */
 579         intel_dp_create_fake_mst_encoders(intel_dig_port);
 580         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 581                                            &intel_dp->aux, 16, 3, conn_base_id);
 582         if (ret) {
 583                 intel_dp->can_mst = false;
 584                 return ret;
 585         }
 586         return 0;
 587 }
 588
 589 void
 590 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 591 {
 592         struct intel_dp *intel_dp = &intel_dig_port->dp;
 593
 594         if (!intel_dp->can_mst)
 595                 return;
 596
 597         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 598         /* encoders will get killed by normal cleanup */
 599 }