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 "i915_drv.h"
  27 #include "intel_drv.h"
  28 #include <drm/drm_atomic_helper.h>
  29 #include <drm/drm_edid.h>
  30 #include <drm/drm_probe_helper.h>
  31
  32 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
  33                                             struct intel_crtc_state *crtc_state,
  34                                             struct drm_connector_state *conn_state,
  35                                             struct link_config_limits *limits)
  36 {
  37         struct drm_atomic_state *state = crtc_state->base.state;
  38         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  39         struct intel_dp *intel_dp = &intel_mst->primary->dp;
  40         struct intel_connector *connector =
  41                 to_intel_connector(conn_state->connector);
  42         const struct drm_display_mode *adjusted_mode =
  43                 &crtc_state->base.adjusted_mode;
  44         void *port = connector->port;
  45         bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
  46                                            DP_DPCD_QUIRK_CONSTANT_N);
  47         int bpp, slots = -EINVAL;
  48
  49         crtc_state->lane_count = limits->max_lane_count;
  50         crtc_state->port_clock = limits->max_clock;
  51
  52         for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
  53                 crtc_state->pipe_bpp = bpp;
  54
  55                 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
  56                                                        crtc_state->pipe_bpp);
  57
  58                 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  59                                                       port, crtc_state->pbn);
  60                 if (slots == -EDEADLK)
  61                         return slots;
  62                 if (slots >= 0)
  63                         break;
  64         }
  65
  66         if (slots < 0) {
  67                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  68                 return slots;
  69         }
  70
  71         intel_link_compute_m_n(crtc_state->pipe_bpp,
  72                                crtc_state->lane_count,
  73                                adjusted_mode->crtc_clock,
  74                                crtc_state->port_clock,
  75                                &crtc_state->dp_m_n,
  76                                constant_n);
  77         crtc_state->dp_m_n.tu = slots;
  78
  79         return 0;
  80 }
  81
  82 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
  83                                        struct intel_crtc_state *pipe_config,
  84                                        struct drm_connector_state *conn_state)
  85 {
  86         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
  87         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  88         struct intel_dp *intel_dp = &intel_mst->primary->dp;
  89         struct intel_connector *connector =
  90                 to_intel_connector(conn_state->connector);
  91         struct intel_digital_connector_state *intel_conn_state =
  92                 to_intel_digital_connector_state(conn_state);
  93         const struct drm_display_mode *adjusted_mode =
  94                 &pipe_config->base.adjusted_mode;
  95         void *port = connector->port;
  96         struct link_config_limits limits;
  97         int ret;
  98
  99         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 100                 return -EINVAL;
 101
 102         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 103         pipe_config->has_pch_encoder = false;
 104
 105         if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
 106                 pipe_config->has_audio =
 107                         drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port);
 108         else
 109                 pipe_config->has_audio =
 110                         intel_conn_state->force_audio == HDMI_AUDIO_ON;
 111
 112         /*
 113          * for MST we always configure max link bw - the spec doesn't
 114          * seem to suggest we should do otherwise.
 115          */
 116         limits.min_clock =
 117         limits.max_clock = intel_dp_max_link_rate(intel_dp);
 118
 119         limits.min_lane_count =
 120         limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
 121
 122         limits.min_bpp = 6 * 3;
 123         limits.max_bpp = pipe_config->pipe_bpp;
 124
 125         intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
 126
 127         ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
 128                                                conn_state, &limits);
 129         if (ret)
 130                 return ret;
 131
 132         pipe_config->limited_color_range =
 133                 intel_dp_limited_color_range(pipe_config, conn_state);
 134
 135         if (IS_GEN9_LP(dev_priv))
 136                 pipe_config->lane_lat_optim_mask =
 137                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 138
 139         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 140
 141         return 0;
 142 }
 143
 144 static int
 145 intel_dp_mst_atomic_check(struct drm_connector *connector,
 146                           struct drm_connector_state *new_conn_state)
 147 {
 148         struct drm_atomic_state *state = new_conn_state->state;
 149         struct drm_connector_state *old_conn_state =
 150                 drm_atomic_get_old_connector_state(state, connector);
 151         struct intel_connector *intel_connector =
 152                 to_intel_connector(connector);
 153         struct drm_crtc *new_crtc = new_conn_state->crtc;
 154         struct drm_crtc_state *crtc_state;
 155         struct drm_dp_mst_topology_mgr *mgr;
 156         int ret;
 157
 158         ret = intel_digital_connector_atomic_check(connector, new_conn_state);
 159         if (ret)
 160                 return ret;
 161
 162         if (!old_conn_state->crtc)
 163                 return 0;
 164
 165         /* We only want to free VCPI if this state disables the CRTC on this
 166          * connector
 167          */
 168         if (new_crtc) {
 169                 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
 170
 171                 if (!crtc_state ||
 172                     !drm_atomic_crtc_needs_modeset(crtc_state) ||
 173                     crtc_state->enable)
 174                         return 0;
 175         }
 176
 177         mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
 178         ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
 179                                                intel_connector->port);
 180
 181         return ret;
 182 }
 183
 184 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 185                                  const struct intel_crtc_state *old_crtc_state,
 186                                  const struct drm_connector_state *old_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 intel_connector *connector =
 192                 to_intel_connector(old_conn_state->connector);
 193         int ret;
 194
 195         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 196
 197         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 198
 199         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 200         if (ret) {
 201                 DRM_ERROR("failed to update payload %d\n", ret);
 202         }
 203         if (old_crtc_state->has_audio)
 204                 intel_audio_codec_disable(encoder,
 205                                           old_crtc_state, old_conn_state);
 206 }
 207
 208 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 209                                       const struct intel_crtc_state *old_crtc_state,
 210                                       const struct drm_connector_state *old_conn_state)
 211 {
 212         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 213         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 214         struct intel_dp *intel_dp = &intel_dig_port->dp;
 215         struct intel_connector *connector =
 216                 to_intel_connector(old_conn_state->connector);
 217
 218         intel_ddi_disable_pipe_clock(old_crtc_state);
 219
 220         /* this can fail */
 221         drm_dp_check_act_status(&intel_dp->mst_mgr);
 222         /* and this can also fail */
 223         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 224
 225         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 226
 227         /*
 228          * Power down mst path before disabling the port, otherwise we end
 229          * up getting interrupts from the sink upon detecting link loss.
 230          */
 231         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 232                                      false);
 233
 234         intel_dp->active_mst_links--;
 235
 236         intel_mst->connector = NULL;
 237         if (intel_dp->active_mst_links == 0) {
 238                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 239                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 240                                                   old_crtc_state, NULL);
 241         }
 242
 243         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 244 }
 245
 246 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 247                                         const struct intel_crtc_state *pipe_config,
 248                                         const struct drm_connector_state *conn_state)
 249 {
 250         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 251         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 252         struct intel_dp *intel_dp = &intel_dig_port->dp;
 253
 254         if (intel_dp->active_mst_links == 0)
 255                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 256                                                     pipe_config, NULL);
 257 }
 258
 259 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 260                                           const struct intel_crtc_state *old_crtc_state,
 261                                           const struct drm_connector_state *old_conn_state)
 262 {
 263         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 264         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 265         struct intel_dp *intel_dp = &intel_dig_port->dp;
 266
 267         if (intel_dp->active_mst_links == 0)
 268                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 269                                                       old_crtc_state,
 270                                                       old_conn_state);
 271 }
 272
 273 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 274                                     const struct intel_crtc_state *pipe_config,
 275                                     const struct drm_connector_state *conn_state)
 276 {
 277         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 278         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 279         struct intel_dp *intel_dp = &intel_dig_port->dp;
 280         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 281         enum port port = intel_dig_port->base.port;
 282         struct intel_connector *connector =
 283                 to_intel_connector(conn_state->connector);
 284         int ret;
 285         u32 temp;
 286
 287         /* MST encoders are bound to a crtc, not to a connector,
 288          * force the mapping here for get_hw_state.
 289          */
 290         connector->encoder = encoder;
 291         intel_mst->connector = connector;
 292
 293         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 294
 295         if (intel_dp->active_mst_links == 0)
 296                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 297
 298         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 299
 300         if (intel_dp->active_mst_links == 0)
 301                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 302                                                 pipe_config, NULL);
 303
 304         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 305                                        connector->port,
 306                                        pipe_config->pbn,
 307                                        pipe_config->dp_m_n.tu);
 308         if (!ret)
 309                 DRM_ERROR("failed to allocate vcpi\n");
 310
 311         intel_dp->active_mst_links++;
 312         temp = I915_READ(DP_TP_STATUS(port));
 313         I915_WRITE(DP_TP_STATUS(port), temp);
 314
 315         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 316
 317         intel_ddi_enable_pipe_clock(pipe_config);
 318 }
 319
 320 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 321                                 const struct intel_crtc_state *pipe_config,
 322                                 const struct drm_connector_state *conn_state)
 323 {
 324         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 325         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 326         struct intel_dp *intel_dp = &intel_dig_port->dp;
 327         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 328         enum port port = intel_dig_port->base.port;
 329
 330         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 331
 332         if (intel_wait_for_register(&dev_priv->uncore,
 333                                     DP_TP_STATUS(port),
 334                                     DP_TP_STATUS_ACT_SENT,
 335                                     DP_TP_STATUS_ACT_SENT,
 336                                     1))
 337                 DRM_ERROR("Timed out waiting for ACT sent\n");
 338
 339         drm_dp_check_act_status(&intel_dp->mst_mgr);
 340
 341         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 342         if (pipe_config->has_audio)
 343                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 344 }
 345
 346 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 347                                       enum pipe *pipe)
 348 {
 349         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 350         *pipe = intel_mst->pipe;
 351         if (intel_mst->connector)
 352                 return true;
 353         return false;
 354 }
 355
 356 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 357                                         struct intel_crtc_state *pipe_config)
 358 {
 359         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 360         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 361
 362         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 363 }
 364
 365 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 366 {
 367         struct intel_connector *intel_connector = to_intel_connector(connector);
 368         struct intel_dp *intel_dp = intel_connector->mst_port;
 369         struct edid *edid;
 370         int ret;
 371
 372         if (drm_connector_is_unregistered(connector))
 373                 return intel_connector_update_modes(connector, NULL);
 374
 375         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 376         ret = intel_connector_update_modes(connector, edid);
 377         kfree(edid);
 378
 379         return ret;
 380 }
 381
 382 static enum drm_connector_status
 383 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 384 {
 385         struct intel_connector *intel_connector = to_intel_connector(connector);
 386         struct intel_dp *intel_dp = intel_connector->mst_port;
 387
 388         if (drm_connector_is_unregistered(connector))
 389                 return connector_status_disconnected;
 390         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 391                                       intel_connector->port);
 392 }
 393
 394 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 395         .detect = intel_dp_mst_detect,
 396         .fill_modes = drm_helper_probe_single_connector_modes,
 397         .atomic_get_property = intel_digital_connector_atomic_get_property,
 398         .atomic_set_property = intel_digital_connector_atomic_set_property,
 399         .late_register = intel_connector_register,
 400         .early_unregister = intel_connector_unregister,
 401         .destroy = intel_connector_destroy,
 402         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 403         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
 404 };
 405
 406 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 407 {
 408         return intel_dp_mst_get_ddc_modes(connector);
 409 }
 410
 411 static enum drm_mode_status
 412 intel_dp_mst_mode_valid(struct drm_connector *connector,
 413                         struct drm_display_mode *mode)
 414 {
 415         struct intel_connector *intel_connector = to_intel_connector(connector);
 416         struct intel_dp *intel_dp = intel_connector->mst_port;
 417         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 418         int max_rate, mode_rate, max_lanes, max_link_clock;
 419
 420         if (drm_connector_is_unregistered(connector))
 421                 return MODE_ERROR;
 422
 423         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 424                 return MODE_NO_DBLESCAN;
 425
 426         max_link_clock = intel_dp_max_link_rate(intel_dp);
 427         max_lanes = intel_dp_max_lane_count(intel_dp);
 428
 429         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 430         mode_rate = intel_dp_link_required(mode->clock, 18);
 431
 432         /* TODO - validate mode against available PBN for link */
 433         if (mode->clock < 10000)
 434                 return MODE_CLOCK_LOW;
 435
 436         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 437                 return MODE_H_ILLEGAL;
 438
 439         if (mode_rate > max_rate || mode->clock > max_dotclk)
 440                 return MODE_CLOCK_HIGH;
 441
 442         return MODE_OK;
 443 }
 444
 445 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 446                                                          struct drm_connector_state *state)
 447 {
 448         struct intel_connector *intel_connector = to_intel_connector(connector);
 449         struct intel_dp *intel_dp = intel_connector->mst_port;
 450         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 451
 452         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 453 }
 454
 455 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 456         .get_modes = intel_dp_mst_get_modes,
 457         .mode_valid = intel_dp_mst_mode_valid,
 458         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 459         .atomic_check = intel_dp_mst_atomic_check,
 460 };
 461
 462 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 463 {
 464         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 465
 466         drm_encoder_cleanup(encoder);
 467         kfree(intel_mst);
 468 }
 469
 470 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 471         .destroy = intel_dp_mst_encoder_destroy,
 472 };
 473
 474 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 475 {
 476         if (connector->encoder && connector->base.state->crtc) {
 477                 enum pipe pipe;
 478                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 479                         return false;
 480                 return true;
 481         }
 482         return false;
 483 }
 484
 485 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)
 486 {
 487         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 488         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 489         struct drm_device *dev = intel_dig_port->base.base.dev;
 490         struct drm_i915_private *dev_priv = to_i915(dev);
 491         struct intel_connector *intel_connector;
 492         struct drm_connector *connector;
 493         enum pipe pipe;
 494         int ret;
 495
 496         intel_connector = intel_connector_alloc();
 497         if (!intel_connector)
 498                 return NULL;
 499
 500         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 501         intel_connector->mst_port = intel_dp;
 502         intel_connector->port = port;
 503         drm_dp_mst_get_port_malloc(port);
 504
 505         connector = &intel_connector->base;
 506         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 507                                  DRM_MODE_CONNECTOR_DisplayPort);
 508         if (ret) {
 509                 intel_connector_free(intel_connector);
 510                 return NULL;
 511         }
 512
 513         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 514
 515         for_each_pipe(dev_priv, pipe) {
 516                 struct drm_encoder *enc =
 517                         &intel_dp->mst_encoders[pipe]->base.base;
 518
 519                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 520                 if (ret)
 521                         goto err;
 522         }
 523
 524         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 525         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 526
 527         ret = drm_connector_set_path_property(connector, pathprop);
 528         if (ret)
 529                 goto err;
 530
 531         intel_attach_force_audio_property(connector);
 532         intel_attach_broadcast_rgb_property(connector);
 533         drm_connector_attach_max_bpc_property(connector, 6, 12);
 534
 535         return connector;
 536
 537 err:
 538         drm_connector_cleanup(connector);
 539         return NULL;
 540 }
 541
 542 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 543 {
 544         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 545
 546         if (dev_priv->fbdev)
 547                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 548                                                 connector);
 549
 550         drm_connector_register(connector);
 551 }
 552
 553 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 554                                            struct drm_connector *connector)
 555 {
 556         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 557
 558         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 559         drm_connector_unregister(connector);
 560
 561         if (dev_priv->fbdev)
 562                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 563                                                    connector);
 564
 565         drm_connector_put(connector);
 566 }
 567
 568 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 569         .add_connector = intel_dp_add_mst_connector,
 570         .register_connector = intel_dp_register_mst_connector,
 571         .destroy_connector = intel_dp_destroy_mst_connector,
 572 };
 573
 574 static struct intel_dp_mst_encoder *
 575 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 576 {
 577         struct intel_dp_mst_encoder *intel_mst;
 578         struct intel_encoder *intel_encoder;
 579         struct drm_device *dev = intel_dig_port->base.base.dev;
 580
 581         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 582
 583         if (!intel_mst)
 584                 return NULL;
 585
 586         intel_mst->pipe = pipe;
 587         intel_encoder = &intel_mst->base;
 588         intel_mst->primary = intel_dig_port;
 589
 590         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 591                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 592
 593         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 594         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 595         intel_encoder->port = intel_dig_port->base.port;
 596         intel_encoder->crtc_mask = 0x7;
 597         intel_encoder->cloneable = 0;
 598
 599         intel_encoder->compute_config = intel_dp_mst_compute_config;
 600         intel_encoder->disable = intel_mst_disable_dp;
 601         intel_encoder->post_disable = intel_mst_post_disable_dp;
 602         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 603         intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
 604         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 605         intel_encoder->enable = intel_mst_enable_dp;
 606         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 607         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 608
 609         return intel_mst;
 610
 611 }
 612
 613 static bool
 614 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 615 {
 616         struct intel_dp *intel_dp = &intel_dig_port->dp;
 617         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 618         enum pipe pipe;
 619
 620         for_each_pipe(dev_priv, pipe)
 621                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 622         return true;
 623 }
 624
 625 int
 626 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 627 {
 628         struct intel_dp *intel_dp = &intel_dig_port->dp;
 629         struct drm_device *dev = intel_dig_port->base.base.dev;
 630         int ret;
 631
 632         intel_dp->can_mst = true;
 633         intel_dp->mst_mgr.cbs = &mst_cbs;
 634
 635         /* create encoders */
 636         intel_dp_create_fake_mst_encoders(intel_dig_port);
 637         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 638                                            &intel_dp->aux, 16, 3, conn_base_id);
 639         if (ret) {
 640                 intel_dp->can_mst = false;
 641                 return ret;
 642         }
 643         return 0;
 644 }
 645
 646 void
 647 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 648 {
 649         struct intel_dp *intel_dp = &intel_dig_port->dp;
 650
 651         if (!intel_dp->can_mst)
 652                 return;
 653
 654         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 655         /* encoders will get killed by normal cleanup */
 656 }