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