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 {
  36         struct drm_device *dev = 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_atomic_state *state;
  41         int bpp, i;
  42         int lane_count, slots;
  43         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  44         struct drm_connector *drm_connector;
  45         struct intel_connector *connector, *found = NULL;
  46         struct drm_connector_state *connector_state;
  47         int mst_pbn;
  48
  49         pipe_config->dp_encoder_is_mst = true;
  50         pipe_config->has_pch_encoder = false;
  51         pipe_config->has_dp_encoder = true;
  52         bpp = 24;
  53         /*
  54          * for MST we always configure max link bw - the spec doesn't
  55          * seem to suggest we should do otherwise.
  56          */
  57         lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
  58
  59
  60         pipe_config->lane_count = lane_count;
  61
  62         pipe_config->pipe_bpp = 24;
  63         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  64
  65         state = pipe_config->base.state;
  66
  67         for_each_connector_in_state(state, drm_connector, connector_state, i) {
  68                 connector = to_intel_connector(drm_connector);
  69
  70                 if (connector_state->best_encoder == &encoder->base) {
  71                         found = connector;
  72                         break;
  73                 }
  74         }
  75
  76         if (!found) {
  77                 DRM_ERROR("can't find connector\n");
  78                 return false;
  79         }
  80
  81         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, found->port))
  82                 pipe_config->has_audio = true;
  83         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  84
  85         pipe_config->pbn = mst_pbn;
  86         slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
  87
  88         intel_link_compute_m_n(bpp, lane_count,
  89                                adjusted_mode->crtc_clock,
  90                                pipe_config->port_clock,
  91                                &pipe_config->dp_m_n);
  92
  93         pipe_config->dp_m_n.tu = slots;
  94
  95         if (IS_HASWELL(dev) || IS_BROADWELL(dev))
  96                 hsw_dp_set_ddi_pll_sel(pipe_config);
  97
  98         return true;
  99
 100 }
 101
 102 static void intel_mst_disable_dp(struct intel_encoder *encoder)
 103 {
 104         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 105         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 106         struct intel_dp *intel_dp = &intel_dig_port->dp;
 107         struct drm_device *dev = encoder->base.dev;
 108         struct drm_i915_private *dev_priv = dev->dev_private;
 109         struct drm_crtc *crtc = encoder->base.crtc;
 110         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 111
 112         int ret;
 113
 114         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 115
 116         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
 117
 118         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 119         if (ret) {
 120                 DRM_ERROR("failed to update payload %d\n", ret);
 121         }
 122         if (intel_crtc->config->has_audio) {
 123                 intel_audio_codec_disable(encoder);
 124                 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
 125         }
 126 }
 127
 128 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
 129 {
 130         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 131         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 132         struct intel_dp *intel_dp = &intel_dig_port->dp;
 133
 134         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 135
 136         /* this can fail */
 137         drm_dp_check_act_status(&intel_dp->mst_mgr);
 138         /* and this can also fail */
 139         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 140
 141         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
 142
 143         intel_dp->active_mst_links--;
 144         intel_mst->port = NULL;
 145         if (intel_dp->active_mst_links == 0) {
 146                 intel_dig_port->base.post_disable(&intel_dig_port->base);
 147                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 148         }
 149 }
 150
 151 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
 152 {
 153         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 154         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 155         struct intel_dp *intel_dp = &intel_dig_port->dp;
 156         struct drm_device *dev = encoder->base.dev;
 157         struct drm_i915_private *dev_priv = dev->dev_private;
 158         enum port port = intel_dig_port->port;
 159         int ret;
 160         uint32_t temp;
 161         struct intel_connector *found = NULL, *connector;
 162         int slots;
 163         struct drm_crtc *crtc = encoder->base.crtc;
 164         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 165
 166         for_each_intel_connector(dev, connector) {
 167                 if (connector->base.state->best_encoder == &encoder->base) {
 168                         found = connector;
 169                         break;
 170                 }
 171         }
 172
 173         if (!found) {
 174                 DRM_ERROR("can't find connector\n");
 175                 return;
 176         }
 177
 178         /* MST encoders are bound to a crtc, not to a connector,
 179          * force the mapping here for get_hw_state.
 180          */
 181         found->encoder = encoder;
 182
 183         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 184         intel_mst->port = found->port;
 185
 186         if (intel_dp->active_mst_links == 0) {
 187                 intel_prepare_ddi_buffer(&intel_dig_port->base);
 188
 189                 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
 190
 191                 intel_dp_set_link_params(intel_dp, intel_crtc->config);
 192
 193                 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
 194
 195                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 196
 197                 intel_dp_start_link_train(intel_dp);
 198                 intel_dp_stop_link_train(intel_dp);
 199         }
 200
 201         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 202                                        intel_mst->port,
 203                                        intel_crtc->config->pbn, &slots);
 204         if (ret == false) {
 205                 DRM_ERROR("failed to allocate vcpi\n");
 206                 return;
 207         }
 208
 209
 210         intel_dp->active_mst_links++;
 211         temp = I915_READ(DP_TP_STATUS(port));
 212         I915_WRITE(DP_TP_STATUS(port), temp);
 213
 214         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 215 }
 216
 217 static void intel_mst_enable_dp(struct intel_encoder *encoder)
 218 {
 219         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 220         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 221         struct intel_dp *intel_dp = &intel_dig_port->dp;
 222         struct drm_device *dev = intel_dig_port->base.base.dev;
 223         struct drm_i915_private *dev_priv = dev->dev_private;
 224         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
 225         enum port port = intel_dig_port->port;
 226         int ret;
 227
 228         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 229
 230         if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
 231                      1))
 232                 DRM_ERROR("Timed out waiting for ACT sent\n");
 233
 234         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 235
 236         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 237
 238         if (crtc->config->has_audio) {
 239                 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
 240                                  pipe_name(crtc->pipe));
 241                 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
 242                 intel_audio_codec_enable(encoder);
 243         }
 244 }
 245
 246 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 247                                       enum pipe *pipe)
 248 {
 249         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 250         *pipe = intel_mst->pipe;
 251         if (intel_mst->port)
 252                 return true;
 253         return false;
 254 }
 255
 256 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 257                                         struct intel_crtc_state *pipe_config)
 258 {
 259         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 260         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 261         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
 262         struct drm_device *dev = encoder->base.dev;
 263         struct drm_i915_private *dev_priv = dev->dev_private;
 264         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 265         u32 temp, flags = 0;
 266
 267         pipe_config->has_dp_encoder = true;
 268
 269         pipe_config->has_audio =
 270                 intel_ddi_is_audio_enabled(dev_priv, crtc);
 271
 272         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
 273         if (temp & TRANS_DDI_PHSYNC)
 274                 flags |= DRM_MODE_FLAG_PHSYNC;
 275         else
 276                 flags |= DRM_MODE_FLAG_NHSYNC;
 277         if (temp & TRANS_DDI_PVSYNC)
 278                 flags |= DRM_MODE_FLAG_PVSYNC;
 279         else
 280                 flags |= DRM_MODE_FLAG_NVSYNC;
 281
 282         switch (temp & TRANS_DDI_BPC_MASK) {
 283         case TRANS_DDI_BPC_6:
 284                 pipe_config->pipe_bpp = 18;
 285                 break;
 286         case TRANS_DDI_BPC_8:
 287                 pipe_config->pipe_bpp = 24;
 288                 break;
 289         case TRANS_DDI_BPC_10:
 290                 pipe_config->pipe_bpp = 30;
 291                 break;
 292         case TRANS_DDI_BPC_12:
 293                 pipe_config->pipe_bpp = 36;
 294                 break;
 295         default:
 296                 break;
 297         }
 298         pipe_config->base.adjusted_mode.flags |= flags;
 299
 300         pipe_config->lane_count =
 301                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
 302
 303         intel_dp_get_m_n(crtc, pipe_config);
 304
 305         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 306 }
 307
 308 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 309 {
 310         struct intel_connector *intel_connector = to_intel_connector(connector);
 311         struct intel_dp *intel_dp = intel_connector->mst_port;
 312         struct edid *edid;
 313         int ret;
 314
 315         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 316         if (!edid)
 317                 return 0;
 318
 319         ret = intel_connector_update_modes(connector, edid);
 320         kfree(edid);
 321
 322         return ret;
 323 }
 324
 325 static enum drm_connector_status
 326 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 327 {
 328         struct intel_connector *intel_connector = to_intel_connector(connector);
 329         struct intel_dp *intel_dp = intel_connector->mst_port;
 330
 331         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 332 }
 333
 334 static int
 335 intel_dp_mst_set_property(struct drm_connector *connector,
 336                           struct drm_property *property,
 337                           uint64_t val)
 338 {
 339         return 0;
 340 }
 341
 342 static void
 343 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 344 {
 345         struct intel_connector *intel_connector = to_intel_connector(connector);
 346
 347         if (!IS_ERR_OR_NULL(intel_connector->edid))
 348                 kfree(intel_connector->edid);
 349
 350         drm_connector_cleanup(connector);
 351         kfree(connector);
 352 }
 353
 354 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 355         .dpms = drm_atomic_helper_connector_dpms,
 356         .detect = intel_dp_mst_detect,
 357         .fill_modes = drm_helper_probe_single_connector_modes,
 358         .set_property = intel_dp_mst_set_property,
 359         .atomic_get_property = intel_connector_atomic_get_property,
 360         .destroy = intel_dp_mst_connector_destroy,
 361         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 362         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 363 };
 364
 365 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 366 {
 367         return intel_dp_mst_get_ddc_modes(connector);
 368 }
 369
 370 static enum drm_mode_status
 371 intel_dp_mst_mode_valid(struct drm_connector *connector,
 372                         struct drm_display_mode *mode)
 373 {
 374         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 375
 376         /* TODO - validate mode against available PBN for link */
 377         if (mode->clock < 10000)
 378                 return MODE_CLOCK_LOW;
 379
 380         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 381                 return MODE_H_ILLEGAL;
 382
 383         if (mode->clock > max_dotclk)
 384                 return MODE_CLOCK_HIGH;
 385
 386         return MODE_OK;
 387 }
 388
 389 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 390                                                          struct drm_connector_state *state)
 391 {
 392         struct intel_connector *intel_connector = to_intel_connector(connector);
 393         struct intel_dp *intel_dp = intel_connector->mst_port;
 394         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 395
 396         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 397 }
 398
 399 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
 400 {
 401         struct intel_connector *intel_connector = to_intel_connector(connector);
 402         struct intel_dp *intel_dp = intel_connector->mst_port;
 403         return &intel_dp->mst_encoders[0]->base.base;
 404 }
 405
 406 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 407         .get_modes = intel_dp_mst_get_modes,
 408         .mode_valid = intel_dp_mst_mode_valid,
 409         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 410         .best_encoder = intel_mst_best_encoder,
 411 };
 412
 413 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 414 {
 415         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 416
 417         drm_encoder_cleanup(encoder);
 418         kfree(intel_mst);
 419 }
 420
 421 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 422         .destroy = intel_dp_mst_encoder_destroy,
 423 };
 424
 425 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 426 {
 427         if (connector->encoder && connector->base.state->crtc) {
 428                 enum pipe pipe;
 429                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 430                         return false;
 431                 return true;
 432         }
 433         return false;
 434 }
 435
 436 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
 437 {
 438 #ifdef CONFIG_DRM_FBDEV_EMULATION
 439         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 440
 441         if (dev_priv->fbdev)
 442                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 443                                                 &connector->base);
 444 #endif
 445 }
 446
 447 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
 448 {
 449 #ifdef CONFIG_DRM_FBDEV_EMULATION
 450         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 451
 452         if (dev_priv->fbdev)
 453                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 454                                                    &connector->base);
 455 #endif
 456 }
 457
 458 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)
 459 {
 460         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 461         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 462         struct drm_device *dev = intel_dig_port->base.base.dev;
 463         struct intel_connector *intel_connector;
 464         struct drm_connector *connector;
 465         int i;
 466
 467         intel_connector = intel_connector_alloc();
 468         if (!intel_connector)
 469                 return NULL;
 470
 471         connector = &intel_connector->base;
 472         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 473         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 474
 475         intel_connector->unregister = intel_connector_unregister;
 476         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 477         intel_connector->mst_port = intel_dp;
 478         intel_connector->port = port;
 479
 480         for (i = PIPE_A; i <= PIPE_C; i++) {
 481                 drm_mode_connector_attach_encoder(&intel_connector->base,
 482                                                   &intel_dp->mst_encoders[i]->base.base);
 483         }
 484         intel_dp_add_properties(intel_dp, connector);
 485
 486         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 487         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 488
 489         drm_mode_connector_set_path_property(connector, pathprop);
 490         return connector;
 491 }
 492
 493 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 494 {
 495         struct intel_connector *intel_connector = to_intel_connector(connector);
 496         struct drm_device *dev = connector->dev;
 497         drm_modeset_lock_all(dev);
 498         intel_connector_add_to_fbdev(intel_connector);
 499         drm_modeset_unlock_all(dev);
 500         drm_connector_register(&intel_connector->base);
 501 }
 502
 503 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 504                                            struct drm_connector *connector)
 505 {
 506         struct intel_connector *intel_connector = to_intel_connector(connector);
 507         struct drm_device *dev = connector->dev;
 508
 509         intel_connector->unregister(intel_connector);
 510
 511         /* need to nuke the connector */
 512         drm_modeset_lock_all(dev);
 513         if (connector->state->crtc) {
 514                 struct drm_mode_set set;
 515                 int ret;
 516
 517                 memset(&set, 0, sizeof(set));
 518                 set.crtc = connector->state->crtc,
 519
 520                 ret = drm_atomic_helper_set_config(&set);
 521
 522                 WARN(ret, "Disabling mst crtc failed with %i\n", ret);
 523         }
 524
 525         intel_connector_remove_from_fbdev(intel_connector);
 526         drm_connector_cleanup(connector);
 527         drm_modeset_unlock_all(dev);
 528
 529         kfree(intel_connector);
 530         DRM_DEBUG_KMS("\n");
 531 }
 532
 533 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 534 {
 535         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 536         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 537         struct drm_device *dev = intel_dig_port->base.base.dev;
 538
 539         drm_kms_helper_hotplug_event(dev);
 540 }
 541
 542 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 543         .add_connector = intel_dp_add_mst_connector,
 544         .register_connector = intel_dp_register_mst_connector,
 545         .destroy_connector = intel_dp_destroy_mst_connector,
 546         .hotplug = intel_dp_mst_hotplug,
 547 };
 548
 549 static struct intel_dp_mst_encoder *
 550 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 551 {
 552         struct intel_dp_mst_encoder *intel_mst;
 553         struct intel_encoder *intel_encoder;
 554         struct drm_device *dev = intel_dig_port->base.base.dev;
 555
 556         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 557
 558         if (!intel_mst)
 559                 return NULL;
 560
 561         intel_mst->pipe = pipe;
 562         intel_encoder = &intel_mst->base;
 563         intel_mst->primary = intel_dig_port;
 564
 565         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 566                          DRM_MODE_ENCODER_DPMST, NULL);
 567
 568         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 569         intel_encoder->crtc_mask = 0x7;
 570         intel_encoder->cloneable = 0;
 571
 572         intel_encoder->compute_config = intel_dp_mst_compute_config;
 573         intel_encoder->disable = intel_mst_disable_dp;
 574         intel_encoder->post_disable = intel_mst_post_disable_dp;
 575         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 576         intel_encoder->enable = intel_mst_enable_dp;
 577         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 578         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 579
 580         return intel_mst;
 581
 582 }
 583
 584 static bool
 585 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 586 {
 587         int i;
 588         struct intel_dp *intel_dp = &intel_dig_port->dp;
 589
 590         for (i = PIPE_A; i <= PIPE_C; i++)
 591                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
 592         return true;
 593 }
 594
 595 int
 596 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 597 {
 598         struct intel_dp *intel_dp = &intel_dig_port->dp;
 599         struct drm_device *dev = intel_dig_port->base.base.dev;
 600         int ret;
 601
 602         intel_dp->can_mst = true;
 603         intel_dp->mst_mgr.cbs = &mst_cbs;
 604
 605         /* create encoders */
 606         intel_dp_create_fake_mst_encoders(intel_dig_port);
 607         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
 608         if (ret) {
 609                 intel_dp->can_mst = false;
 610                 return ret;
 611         }
 612         return 0;
 613 }
 614
 615 void
 616 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 617 {
 618         struct intel_dp *intel_dp = &intel_dig_port->dp;
 619
 620         if (!intel_dp->can_mst)
 621                 return;
 622
 623         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 624         /* encoders will get killed by normal cleanup */
 625 }