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 = pipe_config->base.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
  48         pipe_config->has_pch_encoder = false;
  49         bpp = 24;
  50         if (intel_dp->compliance.test_data.bpc) {
  51                 bpp = intel_dp->compliance.test_data.bpc * 3;
  52                 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
  53                               bpp);
  54         }
  55         /*
  56          * for MST we always configure max link bw - the spec doesn't
  57          * seem to suggest we should do otherwise.
  58          */
  59         lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
  60         pipe_config->lane_count = lane_count;
  61
  62         pipe_config->pipe_bpp = bpp;
  63
  64         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  65
  66         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
  67                 pipe_config->has_audio = true;
  68
  69         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  70         pipe_config->pbn = mst_pbn;
  71
  72         slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  73                                               connector->port, mst_pbn);
  74         if (slots < 0) {
  75                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  76                 return false;
  77         }
  78
  79         intel_link_compute_m_n(bpp, lane_count,
  80                                adjusted_mode->crtc_clock,
  81                                pipe_config->port_clock,
  82                                &pipe_config->dp_m_n);
  83
  84         pipe_config->dp_m_n.tu = slots;
  85
  86         return true;
  87 }
  88
  89 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
  90                 struct drm_connector_state *new_conn_state)
  91 {
  92         struct drm_atomic_state *state = new_conn_state->state;
  93         struct drm_connector_state *old_conn_state;
  94         struct drm_crtc *old_crtc;
  95         struct drm_crtc_state *crtc_state;
  96         int slots, ret = 0;
  97
  98         old_conn_state = drm_atomic_get_old_connector_state(state, connector);
  99         old_crtc = old_conn_state->crtc;
 100         if (!old_crtc)
 101                 return ret;
 102
 103         crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
 104         slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
 105         if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
 106                 struct drm_dp_mst_topology_mgr *mgr;
 107                 struct drm_encoder *old_encoder;
 108
 109                 old_encoder = old_conn_state->best_encoder;
 110                 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
 111
 112                 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
 113                 if (ret)
 114                         DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
 115                 else
 116                         to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
 117         }
 118         return ret;
 119 }
 120
 121 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 122                                  struct intel_crtc_state *old_crtc_state,
 123                                  struct drm_connector_state *old_conn_state)
 124 {
 125         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 126         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 127         struct intel_dp *intel_dp = &intel_dig_port->dp;
 128         struct intel_connector *connector =
 129                 to_intel_connector(old_conn_state->connector);
 130         int ret;
 131
 132         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 133
 134         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 135
 136         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 137         if (ret) {
 138                 DRM_ERROR("failed to update payload %d\n", ret);
 139         }
 140         if (old_crtc_state->has_audio)
 141                 intel_audio_codec_disable(encoder);
 142 }
 143
 144 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 145                                       struct intel_crtc_state *old_crtc_state,
 146                                       struct drm_connector_state *old_conn_state)
 147 {
 148         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 149         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 150         struct intel_dp *intel_dp = &intel_dig_port->dp;
 151         struct intel_connector *connector =
 152                 to_intel_connector(old_conn_state->connector);
 153
 154         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 155
 156         /* this can fail */
 157         drm_dp_check_act_status(&intel_dp->mst_mgr);
 158         /* and this can also fail */
 159         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 160
 161         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 162
 163         intel_dp->active_mst_links--;
 164
 165         intel_mst->connector = NULL;
 166         if (intel_dp->active_mst_links == 0) {
 167                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 168                                                   NULL, NULL);
 169
 170                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 171         }
 172 }
 173
 174 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 175                                     struct intel_crtc_state *pipe_config,
 176                                     struct drm_connector_state *conn_state)
 177 {
 178         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 179         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 180         struct intel_dp *intel_dp = &intel_dig_port->dp;
 181         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 182         enum port port = intel_dig_port->port;
 183         struct intel_connector *connector =
 184                 to_intel_connector(conn_state->connector);
 185         int ret;
 186         uint32_t temp;
 187
 188         /* MST encoders are bound to a crtc, not to a connector,
 189          * force the mapping here for get_hw_state.
 190          */
 191         connector->encoder = encoder;
 192         intel_mst->connector = connector;
 193
 194         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 195
 196         if (intel_dp->active_mst_links == 0)
 197                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 198                                                 pipe_config, NULL);
 199
 200         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 201                                        connector->port,
 202                                        pipe_config->pbn,
 203                                        pipe_config->dp_m_n.tu);
 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                                 struct intel_crtc_state *pipe_config,
 219                                 struct drm_connector_state *conn_state)
 220 {
 221         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 222         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 223         struct intel_dp *intel_dp = &intel_dig_port->dp;
 224         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 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 (intel_wait_for_register(dev_priv,
 231                                     DP_TP_STATUS(port),
 232                                     DP_TP_STATUS_ACT_SENT,
 233                                     DP_TP_STATUS_ACT_SENT,
 234                                     1))
 235                 DRM_ERROR("Timed out waiting for ACT sent\n");
 236
 237         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 238
 239         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 240         if (pipe_config->has_audio)
 241                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 242 }
 243
 244 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 245                                       enum pipe *pipe)
 246 {
 247         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 248         *pipe = intel_mst->pipe;
 249         if (intel_mst->connector)
 250                 return true;
 251         return false;
 252 }
 253
 254 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 255                                         struct intel_crtc_state *pipe_config)
 256 {
 257         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 258         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 259         struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
 260         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 261         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 262         u32 temp, flags = 0;
 263
 264         pipe_config->has_audio =
 265                 intel_ddi_is_audio_enabled(dev_priv, crtc);
 266
 267         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
 268         if (temp & TRANS_DDI_PHSYNC)
 269                 flags |= DRM_MODE_FLAG_PHSYNC;
 270         else
 271                 flags |= DRM_MODE_FLAG_NHSYNC;
 272         if (temp & TRANS_DDI_PVSYNC)
 273                 flags |= DRM_MODE_FLAG_PVSYNC;
 274         else
 275                 flags |= DRM_MODE_FLAG_NVSYNC;
 276
 277         switch (temp & TRANS_DDI_BPC_MASK) {
 278         case TRANS_DDI_BPC_6:
 279                 pipe_config->pipe_bpp = 18;
 280                 break;
 281         case TRANS_DDI_BPC_8:
 282                 pipe_config->pipe_bpp = 24;
 283                 break;
 284         case TRANS_DDI_BPC_10:
 285                 pipe_config->pipe_bpp = 30;
 286                 break;
 287         case TRANS_DDI_BPC_12:
 288                 pipe_config->pipe_bpp = 36;
 289                 break;
 290         default:
 291                 break;
 292         }
 293         pipe_config->base.adjusted_mode.flags |= flags;
 294
 295         pipe_config->lane_count =
 296                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
 297
 298         intel_dp_get_m_n(crtc, pipe_config);
 299
 300         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 301 }
 302
 303 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 304 {
 305         struct intel_connector *intel_connector = to_intel_connector(connector);
 306         struct intel_dp *intel_dp = intel_connector->mst_port;
 307         struct edid *edid;
 308         int ret;
 309
 310         if (!intel_dp) {
 311                 return intel_connector_update_modes(connector, NULL);
 312         }
 313
 314         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 315         ret = intel_connector_update_modes(connector, edid);
 316         kfree(edid);
 317
 318         return ret;
 319 }
 320
 321 static enum drm_connector_status
 322 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 323 {
 324         struct intel_connector *intel_connector = to_intel_connector(connector);
 325         struct intel_dp *intel_dp = intel_connector->mst_port;
 326
 327         if (!intel_dp)
 328                 return connector_status_disconnected;
 329         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 330 }
 331
 332 static int
 333 intel_dp_mst_set_property(struct drm_connector *connector,
 334                           struct drm_property *property,
 335                           uint64_t val)
 336 {
 337         return 0;
 338 }
 339
 340 static void
 341 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 342 {
 343         struct intel_connector *intel_connector = to_intel_connector(connector);
 344
 345         if (!IS_ERR_OR_NULL(intel_connector->edid))
 346                 kfree(intel_connector->edid);
 347
 348         drm_connector_cleanup(connector);
 349         kfree(connector);
 350 }
 351
 352 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 353         .dpms = drm_atomic_helper_connector_dpms,
 354         .detect = intel_dp_mst_detect,
 355         .fill_modes = drm_helper_probe_single_connector_modes,
 356         .set_property = intel_dp_mst_set_property,
 357         .atomic_get_property = intel_connector_atomic_get_property,
 358         .late_register = intel_connector_register,
 359         .early_unregister = intel_connector_unregister,
 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         struct intel_connector *intel_connector = to_intel_connector(connector);
 375         struct intel_dp *intel_dp = intel_connector->mst_port;
 376         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 377         int bpp = 24; /* MST uses fixed bpp */
 378         int max_rate, mode_rate, max_lanes, max_link_clock;
 379
 380         max_link_clock = intel_dp_max_link_rate(intel_dp);
 381         max_lanes = drm_dp_max_lane_count(intel_dp->dpcd);
 382
 383         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 384         mode_rate = intel_dp_link_required(mode->clock, bpp);
 385
 386         /* TODO - validate mode against available PBN for link */
 387         if (mode->clock < 10000)
 388                 return MODE_CLOCK_LOW;
 389
 390         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 391                 return MODE_H_ILLEGAL;
 392
 393         if (mode_rate > max_rate || mode->clock > max_dotclk)
 394                 return MODE_CLOCK_HIGH;
 395
 396         return MODE_OK;
 397 }
 398
 399 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 400                                                          struct drm_connector_state *state)
 401 {
 402         struct intel_connector *intel_connector = to_intel_connector(connector);
 403         struct intel_dp *intel_dp = intel_connector->mst_port;
 404         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 405
 406         if (!intel_dp)
 407                 return NULL;
 408         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 409 }
 410
 411 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
 412 {
 413         struct intel_connector *intel_connector = to_intel_connector(connector);
 414         struct intel_dp *intel_dp = intel_connector->mst_port;
 415         if (!intel_dp)
 416                 return NULL;
 417         return &intel_dp->mst_encoders[0]->base.base;
 418 }
 419
 420 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 421         .get_modes = intel_dp_mst_get_modes,
 422         .mode_valid = intel_dp_mst_mode_valid,
 423         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 424         .best_encoder = intel_mst_best_encoder,
 425         .atomic_check = intel_dp_mst_atomic_check,
 426 };
 427
 428 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 429 {
 430         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 431
 432         drm_encoder_cleanup(encoder);
 433         kfree(intel_mst);
 434 }
 435
 436 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 437         .destroy = intel_dp_mst_encoder_destroy,
 438 };
 439
 440 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 441 {
 442         if (connector->encoder && connector->base.state->crtc) {
 443                 enum pipe pipe;
 444                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 445                         return false;
 446                 return true;
 447         }
 448         return false;
 449 }
 450
 451 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
 452 {
 453 #ifdef CONFIG_DRM_FBDEV_EMULATION
 454         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 455
 456         if (dev_priv->fbdev)
 457                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 458                                                 &connector->base);
 459 #endif
 460 }
 461
 462 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
 463 {
 464 #ifdef CONFIG_DRM_FBDEV_EMULATION
 465         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 466
 467         if (dev_priv->fbdev)
 468                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 469                                                    &connector->base);
 470 #endif
 471 }
 472
 473 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)
 474 {
 475         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 476         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 477         struct drm_device *dev = intel_dig_port->base.base.dev;
 478         struct intel_connector *intel_connector;
 479         struct drm_connector *connector;
 480         int i;
 481
 482         intel_connector = intel_connector_alloc();
 483         if (!intel_connector)
 484                 return NULL;
 485
 486         connector = &intel_connector->base;
 487         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 488         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 489
 490         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 491         intel_connector->mst_port = intel_dp;
 492         intel_connector->port = port;
 493
 494         for (i = PIPE_A; i <= PIPE_C; i++) {
 495                 drm_mode_connector_attach_encoder(&intel_connector->base,
 496                                                   &intel_dp->mst_encoders[i]->base.base);
 497         }
 498         intel_dp_add_properties(intel_dp, connector);
 499
 500         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 501         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 502
 503         drm_mode_connector_set_path_property(connector, pathprop);
 504         return connector;
 505 }
 506
 507 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 508 {
 509         struct intel_connector *intel_connector = to_intel_connector(connector);
 510         struct drm_device *dev = connector->dev;
 511
 512         drm_modeset_lock_all(dev);
 513         intel_connector_add_to_fbdev(intel_connector);
 514         drm_modeset_unlock_all(dev);
 515
 516         drm_connector_register(&intel_connector->base);
 517 }
 518
 519 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 520                                            struct drm_connector *connector)
 521 {
 522         struct intel_connector *intel_connector = to_intel_connector(connector);
 523         struct drm_device *dev = connector->dev;
 524
 525         drm_connector_unregister(connector);
 526
 527         /* need to nuke the connector */
 528         drm_modeset_lock_all(dev);
 529         intel_connector_remove_from_fbdev(intel_connector);
 530         intel_connector->mst_port = NULL;
 531         drm_modeset_unlock_all(dev);
 532
 533         drm_connector_unreference(&intel_connector->base);
 534         DRM_DEBUG_KMS("\n");
 535 }
 536
 537 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 538 {
 539         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 540         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 541         struct drm_device *dev = intel_dig_port->base.base.dev;
 542
 543         drm_kms_helper_hotplug_event(dev);
 544 }
 545
 546 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 547         .add_connector = intel_dp_add_mst_connector,
 548         .register_connector = intel_dp_register_mst_connector,
 549         .destroy_connector = intel_dp_destroy_mst_connector,
 550         .hotplug = intel_dp_mst_hotplug,
 551 };
 552
 553 static struct intel_dp_mst_encoder *
 554 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 555 {
 556         struct intel_dp_mst_encoder *intel_mst;
 557         struct intel_encoder *intel_encoder;
 558         struct drm_device *dev = intel_dig_port->base.base.dev;
 559
 560         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 561
 562         if (!intel_mst)
 563                 return NULL;
 564
 565         intel_mst->pipe = pipe;
 566         intel_encoder = &intel_mst->base;
 567         intel_mst->primary = intel_dig_port;
 568
 569         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 570                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 571
 572         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 573         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 574         intel_encoder->port = intel_dig_port->port;
 575         intel_encoder->crtc_mask = 0x7;
 576         intel_encoder->cloneable = 0;
 577
 578         intel_encoder->compute_config = intel_dp_mst_compute_config;
 579         intel_encoder->disable = intel_mst_disable_dp;
 580         intel_encoder->post_disable = intel_mst_post_disable_dp;
 581         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 582         intel_encoder->enable = intel_mst_enable_dp;
 583         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 584         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 585
 586         return intel_mst;
 587
 588 }
 589
 590 static bool
 591 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 592 {
 593         int i;
 594         struct intel_dp *intel_dp = &intel_dig_port->dp;
 595
 596         for (i = PIPE_A; i <= PIPE_C; i++)
 597                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
 598         return true;
 599 }
 600
 601 int
 602 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 603 {
 604         struct intel_dp *intel_dp = &intel_dig_port->dp;
 605         struct drm_device *dev = intel_dig_port->base.base.dev;
 606         int ret;
 607
 608         intel_dp->can_mst = true;
 609         intel_dp->mst_mgr.cbs = &mst_cbs;
 610
 611         /* create encoders */
 612         intel_dp_create_fake_mst_encoders(intel_dig_port);
 613         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 614                                            &intel_dp->aux, 16, 3, conn_base_id);
 615         if (ret) {
 616                 intel_dp->can_mst = false;
 617                 return ret;
 618         }
 619         return 0;
 620 }
 621
 622 void
 623 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 624 {
 625         struct intel_dp *intel_dp = &intel_dig_port->dp;
 626
 627         if (!intel_dp->can_mst)
 628                 return;
 629
 630         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 631         /* encoders will get killed by normal cleanup */
 632 }