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