drivers/gpu/drm/i915/display/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/drm_atomic_helper.h>
  27 #include <drm/drm_edid.h>
  28 #include <drm/drm_probe_helper.h>
  29
  30 #include "i915_drv.h"
  31 #include "intel_atomic.h"
  32 #include "intel_audio.h"
  33 #include "intel_connector.h"
  34 #include "intel_ddi.h"
  35 #include "intel_dp.h"
  36 #include "intel_dp_mst.h"
  37 #include "intel_dpio_phy.h"
  38 #include "intel_drv.h"
  39
  40 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
  41                                             struct intel_crtc_state *crtc_state,
  42                                             struct drm_connector_state *conn_state,
  43                                             struct link_config_limits *limits)
  44 {
  45         struct drm_atomic_state *state = crtc_state->base.state;
  46         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  47         struct intel_dp *intel_dp = &intel_mst->primary->dp;
  48         struct intel_connector *connector =
  49                 to_intel_connector(conn_state->connector);
  50         const struct drm_display_mode *adjusted_mode =
  51                 &crtc_state->base.adjusted_mode;
  52         void *port = connector->port;
  53         bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
  54                                            DP_DPCD_QUIRK_CONSTANT_N);
  55         int bpp, slots = -EINVAL;
  56
  57         crtc_state->lane_count = limits->max_lane_count;
  58         crtc_state->port_clock = limits->max_clock;
  59
  60         for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
  61                 crtc_state->pipe_bpp = bpp;
  62
  63                 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
  64                                                        crtc_state->pipe_bpp);
  65
  66                 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  67                                                       port, crtc_state->pbn);
  68                 if (slots == -EDEADLK)
  69                         return slots;
  70                 if (slots >= 0)
  71                         break;
  72         }
  73
  74         if (slots < 0) {
  75                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  76                 return slots;
  77         }
  78
  79         intel_link_compute_m_n(crtc_state->pipe_bpp,
  80                                crtc_state->lane_count,
  81                                adjusted_mode->crtc_clock,
  82                                crtc_state->port_clock,
  83                                &crtc_state->dp_m_n,
  84                                constant_n);
  85         crtc_state->dp_m_n.tu = slots;
  86
  87         return 0;
  88 }
  89
  90 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
  91                                        struct intel_crtc_state *pipe_config,
  92                                        struct drm_connector_state *conn_state)
  93 {
  94         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
  95         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  96         struct intel_dp *intel_dp = &intel_mst->primary->dp;
  97         struct intel_connector *connector =
  98                 to_intel_connector(conn_state->connector);
  99         struct intel_digital_connector_state *intel_conn_state =
 100                 to_intel_digital_connector_state(conn_state);
 101         const struct drm_display_mode *adjusted_mode =
 102                 &pipe_config->base.adjusted_mode;
 103         void *port = connector->port;
 104         struct link_config_limits limits;
 105         int ret;
 106
 107         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 108                 return -EINVAL;
 109
 110         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 111         pipe_config->has_pch_encoder = false;
 112
 113         if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
 114                 pipe_config->has_audio =
 115                         drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port);
 116         else
 117                 pipe_config->has_audio =
 118                         intel_conn_state->force_audio == HDMI_AUDIO_ON;
 119
 120         /*
 121          * for MST we always configure max link bw - the spec doesn't
 122          * seem to suggest we should do otherwise.
 123          */
 124         limits.min_clock =
 125         limits.max_clock = intel_dp_max_link_rate(intel_dp);
 126
 127         limits.min_lane_count =
 128         limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
 129
 130         limits.min_bpp = intel_dp_min_bpp(pipe_config);
 131         limits.max_bpp = pipe_config->pipe_bpp;
 132
 133         intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
 134
 135         ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
 136                                                conn_state, &limits);
 137         if (ret)
 138                 return ret;
 139
 140         pipe_config->limited_color_range =
 141                 intel_dp_limited_color_range(pipe_config, conn_state);
 142
 143         if (IS_GEN9_LP(dev_priv))
 144                 pipe_config->lane_lat_optim_mask =
 145                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 146
 147         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 148
 149         return 0;
 150 }
 151
 152 static int
 153 intel_dp_mst_atomic_check(struct drm_connector *connector,
 154                           struct drm_atomic_state *state)
 155 {
 156         struct drm_connector_state *new_conn_state =
 157                 drm_atomic_get_new_connector_state(state, connector);
 158         struct drm_connector_state *old_conn_state =
 159                 drm_atomic_get_old_connector_state(state, connector);
 160         struct intel_connector *intel_connector =
 161                 to_intel_connector(connector);
 162         struct drm_crtc *new_crtc = new_conn_state->crtc;
 163         struct drm_crtc_state *crtc_state;
 164         struct drm_dp_mst_topology_mgr *mgr;
 165         int ret;
 166
 167         ret = intel_digital_connector_atomic_check(connector, state);
 168         if (ret)
 169                 return ret;
 170
 171         if (!old_conn_state->crtc)
 172                 return 0;
 173
 174         /* We only want to free VCPI if this state disables the CRTC on this
 175          * connector
 176          */
 177         if (new_crtc) {
 178                 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
 179
 180                 if (!crtc_state ||
 181                     !drm_atomic_crtc_needs_modeset(crtc_state) ||
 182                     crtc_state->enable)
 183                         return 0;
 184         }
 185
 186         mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
 187         ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
 188                                                intel_connector->port);
 189
 190         return ret;
 191 }
 192
 193 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 194                                  const struct intel_crtc_state *old_crtc_state,
 195                                  const struct drm_connector_state *old_conn_state)
 196 {
 197         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 198         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 199         struct intel_dp *intel_dp = &intel_dig_port->dp;
 200         struct intel_connector *connector =
 201                 to_intel_connector(old_conn_state->connector);
 202         int ret;
 203
 204         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 205
 206         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 207
 208         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 209         if (ret) {
 210                 DRM_ERROR("failed to update payload %d\n", ret);
 211         }
 212         if (old_crtc_state->has_audio)
 213                 intel_audio_codec_disable(encoder,
 214                                           old_crtc_state, old_conn_state);
 215 }
 216
 217 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 218                                       const struct intel_crtc_state *old_crtc_state,
 219                                       const struct drm_connector_state *old_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 intel_connector *connector =
 225                 to_intel_connector(old_conn_state->connector);
 226
 227         intel_ddi_disable_pipe_clock(old_crtc_state);
 228
 229         /* this can fail */
 230         drm_dp_check_act_status(&intel_dp->mst_mgr);
 231         /* and this can also fail */
 232         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 233
 234         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 235
 236         /*
 237          * Power down mst path before disabling the port, otherwise we end
 238          * up getting interrupts from the sink upon detecting link loss.
 239          */
 240         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 241                                      false);
 242
 243         intel_dp->active_mst_links--;
 244
 245         intel_mst->connector = NULL;
 246         if (intel_dp->active_mst_links == 0) {
 247                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 248                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 249                                                   old_crtc_state, NULL);
 250         }
 251
 252         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 253 }
 254
 255 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 256                                         const struct intel_crtc_state *pipe_config,
 257                                         const struct drm_connector_state *conn_state)
 258 {
 259         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 260         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 261         struct intel_dp *intel_dp = &intel_dig_port->dp;
 262
 263         if (intel_dp->active_mst_links == 0)
 264                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 265                                                     pipe_config, NULL);
 266 }
 267
 268 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 269                                           const struct intel_crtc_state *old_crtc_state,
 270                                           const struct drm_connector_state *old_conn_state)
 271 {
 272         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 273         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 274         struct intel_dp *intel_dp = &intel_dig_port->dp;
 275
 276         if (intel_dp->active_mst_links == 0)
 277                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 278                                                       old_crtc_state,
 279                                                       old_conn_state);
 280 }
 281
 282 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 283                                     const struct intel_crtc_state *pipe_config,
 284                                     const struct drm_connector_state *conn_state)
 285 {
 286         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 287         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 288         struct intel_dp *intel_dp = &intel_dig_port->dp;
 289         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 290         enum port port = intel_dig_port->base.port;
 291         struct intel_connector *connector =
 292                 to_intel_connector(conn_state->connector);
 293         int ret;
 294         u32 temp;
 295
 296         /* MST encoders are bound to a crtc, not to a connector,
 297          * force the mapping here for get_hw_state.
 298          */
 299         connector->encoder = encoder;
 300         intel_mst->connector = connector;
 301
 302         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 303
 304         if (intel_dp->active_mst_links == 0)
 305                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 306
 307         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 308
 309         if (intel_dp->active_mst_links == 0)
 310                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 311                                                 pipe_config, NULL);
 312
 313         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 314                                        connector->port,
 315                                        pipe_config->pbn,
 316                                        pipe_config->dp_m_n.tu);
 317         if (!ret)
 318                 DRM_ERROR("failed to allocate vcpi\n");
 319
 320         intel_dp->active_mst_links++;
 321         temp = I915_READ(DP_TP_STATUS(port));
 322         I915_WRITE(DP_TP_STATUS(port), temp);
 323
 324         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 325
 326         intel_ddi_enable_pipe_clock(pipe_config);
 327 }
 328
 329 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 330                                 const struct intel_crtc_state *pipe_config,
 331                                 const struct drm_connector_state *conn_state)
 332 {
 333         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 334         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 335         struct intel_dp *intel_dp = &intel_dig_port->dp;
 336         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 337         enum port port = intel_dig_port->base.port;
 338
 339         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 340
 341         if (intel_wait_for_register(&dev_priv->uncore,
 342                                     DP_TP_STATUS(port),
 343                                     DP_TP_STATUS_ACT_SENT,
 344                                     DP_TP_STATUS_ACT_SENT,
 345                                     1))
 346                 DRM_ERROR("Timed out waiting for ACT sent\n");
 347
 348         drm_dp_check_act_status(&intel_dp->mst_mgr);
 349
 350         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 351         if (pipe_config->has_audio)
 352                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 353 }
 354
 355 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 356                                       enum pipe *pipe)
 357 {
 358         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 359         *pipe = intel_mst->pipe;
 360         if (intel_mst->connector)
 361                 return true;
 362         return false;
 363 }
 364
 365 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 366                                         struct intel_crtc_state *pipe_config)
 367 {
 368         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 369         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 370
 371         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 372 }
 373
 374 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 375 {
 376         struct intel_connector *intel_connector = to_intel_connector(connector);
 377         struct intel_dp *intel_dp = intel_connector->mst_port;
 378         struct edid *edid;
 379         int ret;
 380
 381         if (drm_connector_is_unregistered(connector))
 382                 return intel_connector_update_modes(connector, NULL);
 383
 384         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 385         ret = intel_connector_update_modes(connector, edid);
 386         kfree(edid);
 387
 388         return ret;
 389 }
 390
 391 static enum drm_connector_status
 392 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 393 {
 394         struct intel_connector *intel_connector = to_intel_connector(connector);
 395         struct intel_dp *intel_dp = intel_connector->mst_port;
 396
 397         if (drm_connector_is_unregistered(connector))
 398                 return connector_status_disconnected;
 399         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 400                                       intel_connector->port);
 401 }
 402
 403 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 404         .detect = intel_dp_mst_detect,
 405         .fill_modes = drm_helper_probe_single_connector_modes,
 406         .atomic_get_property = intel_digital_connector_atomic_get_property,
 407         .atomic_set_property = intel_digital_connector_atomic_set_property,
 408         .late_register = intel_connector_register,
 409         .early_unregister = intel_connector_unregister,
 410         .destroy = intel_connector_destroy,
 411         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 412         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
 413 };
 414
 415 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 416 {
 417         return intel_dp_mst_get_ddc_modes(connector);
 418 }
 419
 420 static enum drm_mode_status
 421 intel_dp_mst_mode_valid(struct drm_connector *connector,
 422                         struct drm_display_mode *mode)
 423 {
 424         struct intel_connector *intel_connector = to_intel_connector(connector);
 425         struct intel_dp *intel_dp = intel_connector->mst_port;
 426         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 427         int max_rate, mode_rate, max_lanes, max_link_clock;
 428
 429         if (drm_connector_is_unregistered(connector))
 430                 return MODE_ERROR;
 431
 432         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 433                 return MODE_NO_DBLESCAN;
 434
 435         max_link_clock = intel_dp_max_link_rate(intel_dp);
 436         max_lanes = intel_dp_max_lane_count(intel_dp);
 437
 438         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 439         mode_rate = intel_dp_link_required(mode->clock, 18);
 440
 441         /* TODO - validate mode against available PBN for link */
 442         if (mode->clock < 10000)
 443                 return MODE_CLOCK_LOW;
 444
 445         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 446                 return MODE_H_ILLEGAL;
 447
 448         if (mode_rate > max_rate || mode->clock > max_dotclk)
 449                 return MODE_CLOCK_HIGH;
 450
 451         return MODE_OK;
 452 }
 453
 454 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 455                                                          struct drm_connector_state *state)
 456 {
 457         struct intel_connector *intel_connector = to_intel_connector(connector);
 458         struct intel_dp *intel_dp = intel_connector->mst_port;
 459         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 460
 461         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 462 }
 463
 464 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 465         .get_modes = intel_dp_mst_get_modes,
 466         .mode_valid = intel_dp_mst_mode_valid,
 467         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 468         .atomic_check = intel_dp_mst_atomic_check,
 469 };
 470
 471 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 472 {
 473         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 474
 475         drm_encoder_cleanup(encoder);
 476         kfree(intel_mst);
 477 }
 478
 479 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 480         .destroy = intel_dp_mst_encoder_destroy,
 481 };
 482
 483 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 484 {
 485         if (connector->encoder && connector->base.state->crtc) {
 486                 enum pipe pipe;
 487                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 488                         return false;
 489                 return true;
 490         }
 491         return false;
 492 }
 493
 494 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)
 495 {
 496         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 497         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 498         struct drm_device *dev = intel_dig_port->base.base.dev;
 499         struct drm_i915_private *dev_priv = to_i915(dev);
 500         struct intel_connector *intel_connector;
 501         struct drm_connector *connector;
 502         enum pipe pipe;
 503         int ret;
 504
 505         intel_connector = intel_connector_alloc();
 506         if (!intel_connector)
 507                 return NULL;
 508
 509         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 510         intel_connector->mst_port = intel_dp;
 511         intel_connector->port = port;
 512         drm_dp_mst_get_port_malloc(port);
 513
 514         connector = &intel_connector->base;
 515         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 516                                  DRM_MODE_CONNECTOR_DisplayPort);
 517         if (ret) {
 518                 intel_connector_free(intel_connector);
 519                 return NULL;
 520         }
 521
 522         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 523
 524         for_each_pipe(dev_priv, pipe) {
 525                 struct drm_encoder *enc =
 526                         &intel_dp->mst_encoders[pipe]->base.base;
 527
 528                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 529                 if (ret)
 530                         goto err;
 531         }
 532
 533         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 534         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 535
 536         ret = drm_connector_set_path_property(connector, pathprop);
 537         if (ret)
 538                 goto err;
 539
 540         intel_attach_force_audio_property(connector);
 541         intel_attach_broadcast_rgb_property(connector);
 542         drm_connector_attach_max_bpc_property(connector, 6, 12);
 543
 544         return connector;
 545
 546 err:
 547         drm_connector_cleanup(connector);
 548         return NULL;
 549 }
 550
 551 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 552 {
 553         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 554
 555         if (dev_priv->fbdev)
 556                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 557                                                 connector);
 558
 559         drm_connector_register(connector);
 560 }
 561
 562 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 563                                            struct drm_connector *connector)
 564 {
 565         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 566
 567         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 568         drm_connector_unregister(connector);
 569
 570         if (dev_priv->fbdev)
 571                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 572                                                    connector);
 573
 574         drm_connector_put(connector);
 575 }
 576
 577 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 578         .add_connector = intel_dp_add_mst_connector,
 579         .register_connector = intel_dp_register_mst_connector,
 580         .destroy_connector = intel_dp_destroy_mst_connector,
 581 };
 582
 583 static struct intel_dp_mst_encoder *
 584 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 585 {
 586         struct intel_dp_mst_encoder *intel_mst;
 587         struct intel_encoder *intel_encoder;
 588         struct drm_device *dev = intel_dig_port->base.base.dev;
 589
 590         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 591
 592         if (!intel_mst)
 593                 return NULL;
 594
 595         intel_mst->pipe = pipe;
 596         intel_encoder = &intel_mst->base;
 597         intel_mst->primary = intel_dig_port;
 598
 599         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 600                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 601
 602         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 603         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 604         intel_encoder->port = intel_dig_port->base.port;
 605         intel_encoder->crtc_mask = 0x7;
 606         intel_encoder->cloneable = 0;
 607
 608         intel_encoder->compute_config = intel_dp_mst_compute_config;
 609         intel_encoder->disable = intel_mst_disable_dp;
 610         intel_encoder->post_disable = intel_mst_post_disable_dp;
 611         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 612         intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
 613         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 614         intel_encoder->enable = intel_mst_enable_dp;
 615         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 616         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 617
 618         return intel_mst;
 619
 620 }
 621
 622 static bool
 623 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 624 {
 625         struct intel_dp *intel_dp = &intel_dig_port->dp;
 626         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 627         enum pipe pipe;
 628
 629         for_each_pipe(dev_priv, pipe)
 630                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 631         return true;
 632 }
 633
 634 int
 635 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 636 {
 637         struct intel_dp *intel_dp = &intel_dig_port->dp;
 638         struct drm_device *dev = intel_dig_port->base.base.dev;
 639         int ret;
 640
 641         intel_dp->can_mst = true;
 642         intel_dp->mst_mgr.cbs = &mst_cbs;
 643
 644         /* create encoders */
 645         intel_dp_create_fake_mst_encoders(intel_dig_port);
 646         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 647                                            &intel_dp->aux, 16, 3, conn_base_id);
 648         if (ret) {
 649                 intel_dp->can_mst = false;
 650                 return ret;
 651         }
 652         return 0;
 653 }
 654
 655 void
 656 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 657 {
 658         struct intel_dp *intel_dp = &intel_dig_port->dp;
 659
 660         if (!intel_dp->can_mst)
 661                 return;
 662
 663         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 664         /* encoders will get killed by normal cleanup */
 665 }