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 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         int bpp;
  44         int lane_count, slots = 0;
  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 = intel_dp_max_lane_count(intel_dp);
  62
  63         pipe_config->lane_count = lane_count;
  64
  65         pipe_config->pipe_bpp = bpp;
  66
  67         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  68
  69         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
  70                 pipe_config->has_audio = true;
  71
  72         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  73         pipe_config->pbn = mst_pbn;
  74
  75         /* Zombie connectors can't have VCPI slots */
  76         if (READ_ONCE(connector->registered)) {
  77                 slots = drm_dp_atomic_find_vcpi_slots(state,
  78                                                       &intel_dp->mst_mgr,
  79                                                       port,
  80                                                       mst_pbn);
  81                 if (slots < 0) {
  82                         DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
  83                                       slots);
  84                         return false;
  85                 }
  86         }
  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                                reduce_m_n);
  93
  94         pipe_config->dp_m_n.tu = slots;
  95
  96         return true;
  97 }
  98
  99 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
 100                 struct drm_connector_state *new_conn_state)
 101 {
 102         struct drm_atomic_state *state = new_conn_state->state;
 103         struct drm_connector_state *old_conn_state;
 104         struct drm_crtc *old_crtc;
 105         struct drm_crtc_state *crtc_state;
 106         int slots, ret = 0;
 107
 108         old_conn_state = drm_atomic_get_old_connector_state(state, connector);
 109         old_crtc = old_conn_state->crtc;
 110         if (!old_crtc)
 111                 return ret;
 112
 113         crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 114         slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
 115         if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
 116                 struct drm_dp_mst_topology_mgr *mgr;
 117                 struct drm_encoder *old_encoder;
 118
 119                 old_encoder = old_conn_state->best_encoder;
 120                 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
 121
 122                 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
 123                 if (ret)
 124                         DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
 125                 else
 126                         to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 127         }
 128         return ret;
 129 }
 130
 131 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 132                                  struct intel_crtc_state *old_crtc_state,
 133                                  struct drm_connector_state *old_conn_state)
 134 {
 135         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 136         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 137         struct intel_dp *intel_dp = &intel_dig_port->dp;
 138         struct intel_connector *connector =
 139                 to_intel_connector(old_conn_state->connector);
 140         int ret;
 141
 142         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 143
 144         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 145
 146         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 147         if (ret) {
 148                 DRM_ERROR("failed to update payload %d\n", ret);
 149         }
 150         if (old_crtc_state->has_audio)
 151                 intel_audio_codec_disable(encoder);
 152 }
 153
 154 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 155                                       struct intel_crtc_state *old_crtc_state,
 156                                       struct drm_connector_state *old_conn_state)
 157 {
 158         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 159         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 160         struct intel_dp *intel_dp = &intel_dig_port->dp;
 161         struct intel_connector *connector =
 162                 to_intel_connector(old_conn_state->connector);
 163
 164         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 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         intel_dp->active_mst_links--;
 174
 175         intel_mst->connector = NULL;
 176         if (intel_dp->active_mst_links == 0) {
 177                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 178                                                   NULL, NULL);
 179
 180                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 181         }
 182 }
 183
 184 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 185                                     struct intel_crtc_state *pipe_config,
 186                                     struct drm_connector_state *conn_state)
 187 {
 188         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 189         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 190         struct intel_dp *intel_dp = &intel_dig_port->dp;
 191         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 192         enum port port = intel_dig_port->port;
 193         struct intel_connector *connector =
 194                 to_intel_connector(conn_state->connector);
 195         int ret;
 196         uint32_t temp;
 197
 198         /* MST encoders are bound to a crtc, not to a connector,
 199          * force the mapping here for get_hw_state.
 200          */
 201         connector->encoder = encoder;
 202         intel_mst->connector = connector;
 203
 204         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 205
 206         if (intel_dp->active_mst_links == 0)
 207                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 208                                                 pipe_config, NULL);
 209
 210         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 211                                        connector->port,
 212                                        pipe_config->pbn,
 213                                        pipe_config->dp_m_n.tu);
 214         if (ret == false) {
 215                 DRM_ERROR("failed to allocate vcpi\n");
 216                 return;
 217         }
 218
 219
 220         intel_dp->active_mst_links++;
 221         temp = I915_READ(DP_TP_STATUS(port));
 222         I915_WRITE(DP_TP_STATUS(port), temp);
 223
 224         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 225 }
 226
 227 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 228                                 struct intel_crtc_state *pipe_config,
 229                                 struct drm_connector_state *conn_state)
 230 {
 231         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 232         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 233         struct intel_dp *intel_dp = &intel_dig_port->dp;
 234         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 235         enum port port = intel_dig_port->port;
 236         int ret;
 237
 238         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 239
 240         if (intel_wait_for_register(dev_priv,
 241                                     DP_TP_STATUS(port),
 242                                     DP_TP_STATUS_ACT_SENT,
 243                                     DP_TP_STATUS_ACT_SENT,
 244                                     1))
 245                 DRM_ERROR("Timed out waiting for ACT sent\n");
 246
 247         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 248
 249         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 250         if (pipe_config->has_audio)
 251                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 252 }
 253
 254 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 255                                       enum pipe *pipe)
 256 {
 257         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 258         *pipe = intel_mst->pipe;
 259         if (intel_mst->connector)
 260                 return true;
 261         return false;
 262 }
 263
 264 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 265                                         struct intel_crtc_state *pipe_config)
 266 {
 267         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 268         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 269         struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
 270         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 271         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 272         u32 temp, flags = 0;
 273
 274         pipe_config->has_audio =
 275                 intel_ddi_is_audio_enabled(dev_priv, crtc);
 276
 277         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
 278         if (temp & TRANS_DDI_PHSYNC)
 279                 flags |= DRM_MODE_FLAG_PHSYNC;
 280         else
 281                 flags |= DRM_MODE_FLAG_NHSYNC;
 282         if (temp & TRANS_DDI_PVSYNC)
 283                 flags |= DRM_MODE_FLAG_PVSYNC;
 284         else
 285                 flags |= DRM_MODE_FLAG_NVSYNC;
 286
 287         switch (temp & TRANS_DDI_BPC_MASK) {
 288         case TRANS_DDI_BPC_6:
 289                 pipe_config->pipe_bpp = 18;
 290                 break;
 291         case TRANS_DDI_BPC_8:
 292                 pipe_config->pipe_bpp = 24;
 293                 break;
 294         case TRANS_DDI_BPC_10:
 295                 pipe_config->pipe_bpp = 30;
 296                 break;
 297         case TRANS_DDI_BPC_12:
 298                 pipe_config->pipe_bpp = 36;
 299                 break;
 300         default:
 301                 break;
 302         }
 303         pipe_config->base.adjusted_mode.flags |= flags;
 304
 305         pipe_config->lane_count =
 306                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
 307
 308         intel_dp_get_m_n(crtc, pipe_config);
 309
 310         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 311 }
 312
 313 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 314 {
 315         struct intel_connector *intel_connector = to_intel_connector(connector);
 316         struct intel_dp *intel_dp = intel_connector->mst_port;
 317         struct edid *edid;
 318         int ret;
 319
 320         if (!READ_ONCE(connector->registered))
 321                 return intel_connector_update_modes(connector, NULL);
 322
 323         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 324         ret = intel_connector_update_modes(connector, edid);
 325         kfree(edid);
 326
 327         return ret;
 328 }
 329
 330 static enum drm_connector_status
 331 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 332 {
 333         struct intel_connector *intel_connector = to_intel_connector(connector);
 334         struct intel_dp *intel_dp = intel_connector->mst_port;
 335
 336         if (!READ_ONCE(connector->registered))
 337                 return connector_status_disconnected;
 338         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 339                                       intel_connector->port);
 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         .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_dp_mst_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 (!READ_ONCE(connector->registered))
 380                 return MODE_ERROR;
 381
 382         max_link_clock = intel_dp_max_link_rate(intel_dp);
 383         max_lanes = intel_dp_max_lane_count(intel_dp);
 384
 385         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 386         mode_rate = intel_dp_link_required(mode->clock, bpp);
 387
 388         /* TODO - validate mode against available PBN for link */
 389         if (mode->clock < 10000)
 390                 return MODE_CLOCK_LOW;
 391
 392         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 393                 return MODE_H_ILLEGAL;
 394
 395         if (mode_rate > max_rate || mode->clock > max_dotclk)
 396                 return MODE_CLOCK_HIGH;
 397
 398         return MODE_OK;
 399 }
 400
 401 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 402                                                          struct drm_connector_state *state)
 403 {
 404         struct intel_connector *intel_connector = to_intel_connector(connector);
 405         struct intel_dp *intel_dp = intel_connector->mst_port;
 406         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 407
 408         if (!READ_ONCE(connector->registered))
 409                 return NULL;
 410         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 411 }
 412
 413 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
 414 {
 415         struct intel_connector *intel_connector = to_intel_connector(connector);
 416         struct intel_dp *intel_dp = intel_connector->mst_port;
 417         if (!intel_dp)
 418                 return NULL;
 419         return &intel_dp->mst_encoders[0]->base.base;
 420 }
 421
 422 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 423         .get_modes = intel_dp_mst_get_modes,
 424         .mode_valid = intel_dp_mst_mode_valid,
 425         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 426         .best_encoder = intel_mst_best_encoder,
 427         .atomic_check = intel_dp_mst_atomic_check,
 428 };
 429
 430 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 431 {
 432         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 433
 434         drm_encoder_cleanup(encoder);
 435         kfree(intel_mst);
 436 }
 437
 438 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 439         .destroy = intel_dp_mst_encoder_destroy,
 440 };
 441
 442 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 443 {
 444         if (connector->encoder && connector->base.state->crtc) {
 445                 enum pipe pipe;
 446                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 447                         return false;
 448                 return true;
 449         }
 450         return false;
 451 }
 452
 453 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)
 454 {
 455         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 456         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 457         struct drm_device *dev = intel_dig_port->base.base.dev;
 458         struct intel_connector *intel_connector;
 459         struct drm_connector *connector;
 460         int i;
 461
 462         intel_connector = intel_connector_alloc();
 463         if (!intel_connector)
 464                 return NULL;
 465
 466         connector = &intel_connector->base;
 467         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 468         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 469
 470         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 471         intel_connector->mst_port = intel_dp;
 472         intel_connector->port = port;
 473
 474         for (i = PIPE_A; i <= PIPE_C; i++) {
 475                 drm_mode_connector_attach_encoder(&intel_connector->base,
 476                                                   &intel_dp->mst_encoders[i]->base.base);
 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         drm_mode_connector_set_path_property(connector, pathprop);
 483         return connector;
 484 }
 485
 486 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 487 {
 488         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 489
 490         if (dev_priv->fbdev)
 491                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 492                                                 connector);
 493
 494         drm_connector_register(connector);
 495 }
 496
 497 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 498                                            struct drm_connector *connector)
 499 {
 500         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 501
 502         drm_connector_unregister(connector);
 503
 504         if (dev_priv->fbdev)
 505                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 506                                                    connector);
 507
 508         drm_connector_unreference(connector);
 509         DRM_DEBUG_KMS("\n");
 510 }
 511
 512 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 513 {
 514         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 515         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 516         struct drm_device *dev = intel_dig_port->base.base.dev;
 517
 518         drm_kms_helper_hotplug_event(dev);
 519 }
 520
 521 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 522         .add_connector = intel_dp_add_mst_connector,
 523         .register_connector = intel_dp_register_mst_connector,
 524         .destroy_connector = intel_dp_destroy_mst_connector,
 525         .hotplug = intel_dp_mst_hotplug,
 526 };
 527
 528 static struct intel_dp_mst_encoder *
 529 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 530 {
 531         struct intel_dp_mst_encoder *intel_mst;
 532         struct intel_encoder *intel_encoder;
 533         struct drm_device *dev = intel_dig_port->base.base.dev;
 534
 535         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 536
 537         if (!intel_mst)
 538                 return NULL;
 539
 540         intel_mst->pipe = pipe;
 541         intel_encoder = &intel_mst->base;
 542         intel_mst->primary = intel_dig_port;
 543
 544         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 545                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 546
 547         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 548         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 549         intel_encoder->port = intel_dig_port->port;
 550         intel_encoder->crtc_mask = 0x7;
 551         intel_encoder->cloneable = 0;
 552
 553         intel_encoder->compute_config = intel_dp_mst_compute_config;
 554         intel_encoder->disable = intel_mst_disable_dp;
 555         intel_encoder->post_disable = intel_mst_post_disable_dp;
 556         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 557         intel_encoder->enable = intel_mst_enable_dp;
 558         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 559         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 560
 561         return intel_mst;
 562
 563 }
 564
 565 static bool
 566 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 567 {
 568         int i;
 569         struct intel_dp *intel_dp = &intel_dig_port->dp;
 570
 571         for (i = PIPE_A; i <= PIPE_C; i++)
 572                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
 573         return true;
 574 }
 575
 576 int
 577 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 578 {
 579         struct intel_dp *intel_dp = &intel_dig_port->dp;
 580         struct drm_device *dev = intel_dig_port->base.base.dev;
 581         int ret;
 582
 583         intel_dp->can_mst = true;
 584         intel_dp->mst_mgr.cbs = &mst_cbs;
 585
 586         /* create encoders */
 587         intel_dp_create_fake_mst_encoders(intel_dig_port);
 588         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 589                                            &intel_dp->aux, 16, 3, conn_base_id);
 590         if (ret) {
 591                 intel_dp->can_mst = false;
 592                 return ret;
 593         }
 594         return 0;
 595 }
 596
 597 void
 598 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 599 {
 600         struct intel_dp *intel_dp = &intel_dig_port->dp;
 601
 602         if (!intel_dp->can_mst)
 603                 return;
 604
 605         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 606         /* encoders will get killed by normal cleanup */
 607 }