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 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 drm_atomic_state *state;
  41         int bpp, i;
  42         int lane_count, slots;
  43         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  44         struct drm_connector *drm_connector;
  45         struct intel_connector *connector, *found = NULL;
  46         struct drm_connector_state *connector_state;
  47         int mst_pbn;
  48
  49         pipe_config->dp_encoder_is_mst = true;
  50         pipe_config->has_pch_encoder = false;
  51         pipe_config->has_dp_encoder = true;
  52         bpp = 24;
  53         /*
  54          * for MST we always configure max link bw - the spec doesn't
  55          * seem to suggest we should do otherwise.
  56          */
  57         lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
  58
  59
  60         pipe_config->lane_count = lane_count;
  61
  62         pipe_config->pipe_bpp = 24;
  63         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  64
  65         state = pipe_config->base.state;
  66
  67         for_each_connector_in_state(state, drm_connector, connector_state, i) {
  68                 connector = to_intel_connector(drm_connector);
  69
  70                 if (connector_state->best_encoder == &encoder->base) {
  71                         found = connector;
  72                         break;
  73                 }
  74         }
  75
  76         if (!found) {
  77                 DRM_ERROR("can't find connector\n");
  78                 return false;
  79         }
  80
  81         if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, found->port))
  82                 pipe_config->has_audio = true;
  83         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  84
  85         pipe_config->pbn = mst_pbn;
  86         slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
  87
  88         intel_link_compute_m_n(bpp, lane_count,
  89                                adjusted_mode->crtc_clock,
  90                                pipe_config->port_clock,
  91                                &pipe_config->dp_m_n);
  92
  93         pipe_config->dp_m_n.tu = slots;
  94
  95         return true;
  96
  97 }
  98
  99 static void intel_mst_disable_dp(struct intel_encoder *encoder)
 100 {
 101         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 102         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 103         struct intel_dp *intel_dp = &intel_dig_port->dp;
 104         struct drm_device *dev = encoder->base.dev;
 105         struct drm_i915_private *dev_priv = dev->dev_private;
 106         struct drm_crtc *crtc = encoder->base.crtc;
 107         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 108
 109         int ret;
 110
 111         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 112
 113         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);
 114
 115         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 116         if (ret) {
 117                 DRM_ERROR("failed to update payload %d\n", ret);
 118         }
 119         if (intel_crtc->config->has_audio) {
 120                 intel_audio_codec_disable(encoder);
 121                 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
 122         }
 123 }
 124
 125 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
 126 {
 127         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 128         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 129         struct intel_dp *intel_dp = &intel_dig_port->dp;
 130
 131         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 132
 133         /* this can fail */
 134         drm_dp_check_act_status(&intel_dp->mst_mgr);
 135         /* and this can also fail */
 136         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 137
 138         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);
 139
 140         intel_dp->active_mst_links--;
 141
 142         intel_mst->connector = NULL;
 143         if (intel_dp->active_mst_links == 0) {
 144                 intel_dig_port->base.post_disable(&intel_dig_port->base);
 145                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 146         }
 147 }
 148
 149 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
 150 {
 151         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 152         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 153         struct intel_dp *intel_dp = &intel_dig_port->dp;
 154         struct drm_device *dev = encoder->base.dev;
 155         struct drm_i915_private *dev_priv = dev->dev_private;
 156         enum port port = intel_dig_port->port;
 157         int ret;
 158         uint32_t temp;
 159         struct intel_connector *found = NULL, *connector;
 160         int slots;
 161         struct drm_crtc *crtc = encoder->base.crtc;
 162         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 163
 164         for_each_intel_connector(dev, connector) {
 165                 if (connector->base.state->best_encoder == &encoder->base) {
 166                         found = connector;
 167                         break;
 168                 }
 169         }
 170
 171         if (!found) {
 172                 DRM_ERROR("can't find connector\n");
 173                 return;
 174         }
 175
 176         /* MST encoders are bound to a crtc, not to a connector,
 177          * force the mapping here for get_hw_state.
 178          */
 179         found->encoder = encoder;
 180
 181         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 182
 183         intel_mst->connector = found;
 184
 185         if (intel_dp->active_mst_links == 0) {
 186                 intel_prepare_ddi_buffer(&intel_dig_port->base);
 187
 188                 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
 189
 190                 intel_dp_set_link_params(intel_dp, intel_crtc->config);
 191
 192                 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
 193
 194                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 195
 196                 intel_dp_start_link_train(intel_dp);
 197                 intel_dp_stop_link_train(intel_dp);
 198         }
 199
 200         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 201                                        intel_mst->connector->port,
 202                                        intel_crtc->config->pbn, &slots);
 203         if (ret == false) {
 204                 DRM_ERROR("failed to allocate vcpi\n");
 205                 return;
 206         }
 207
 208
 209         intel_dp->active_mst_links++;
 210         temp = I915_READ(DP_TP_STATUS(port));
 211         I915_WRITE(DP_TP_STATUS(port), temp);
 212
 213         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 214 }
 215
 216 static void intel_mst_enable_dp(struct intel_encoder *encoder)
 217 {
 218         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 219         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 220         struct intel_dp *intel_dp = &intel_dig_port->dp;
 221         struct drm_device *dev = intel_dig_port->base.base.dev;
 222         struct drm_i915_private *dev_priv = dev->dev_private;
 223         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
 224         enum port port = intel_dig_port->port;
 225         int ret;
 226
 227         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 228
 229         if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
 230                      1))
 231                 DRM_ERROR("Timed out waiting for ACT sent\n");
 232
 233         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 234
 235         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 236
 237         if (crtc->config->has_audio) {
 238                 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
 239                                  pipe_name(crtc->pipe));
 240                 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
 241                 intel_audio_codec_enable(encoder);
 242         }
 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(encoder->base.crtc);
 261         struct drm_device *dev = encoder->base.dev;
 262         struct drm_i915_private *dev_priv = dev->dev_private;
 263         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 264         u32 temp, flags = 0;
 265
 266         pipe_config->has_dp_encoder = true;
 267
 268         pipe_config->has_audio =
 269                 intel_ddi_is_audio_enabled(dev_priv, crtc);
 270
 271         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
 272         if (temp & TRANS_DDI_PHSYNC)
 273                 flags |= DRM_MODE_FLAG_PHSYNC;
 274         else
 275                 flags |= DRM_MODE_FLAG_NHSYNC;
 276         if (temp & TRANS_DDI_PVSYNC)
 277                 flags |= DRM_MODE_FLAG_PVSYNC;
 278         else
 279                 flags |= DRM_MODE_FLAG_NVSYNC;
 280
 281         switch (temp & TRANS_DDI_BPC_MASK) {
 282         case TRANS_DDI_BPC_6:
 283                 pipe_config->pipe_bpp = 18;
 284                 break;
 285         case TRANS_DDI_BPC_8:
 286                 pipe_config->pipe_bpp = 24;
 287                 break;
 288         case TRANS_DDI_BPC_10:
 289                 pipe_config->pipe_bpp = 30;
 290                 break;
 291         case TRANS_DDI_BPC_12:
 292                 pipe_config->pipe_bpp = 36;
 293                 break;
 294         default:
 295                 break;
 296         }
 297         pipe_config->base.adjusted_mode.flags |= flags;
 298
 299         pipe_config->lane_count =
 300                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
 301
 302         intel_dp_get_m_n(crtc, pipe_config);
 303
 304         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 305 }
 306
 307 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 308 {
 309         struct intel_connector *intel_connector = to_intel_connector(connector);
 310         struct intel_dp *intel_dp = intel_connector->mst_port;
 311         struct edid *edid;
 312         int ret;
 313
 314         if (!intel_dp) {
 315                 return intel_connector_update_modes(connector, NULL);
 316         }
 317
 318         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 319         ret = intel_connector_update_modes(connector, edid);
 320         kfree(edid);
 321
 322         return ret;
 323 }
 324
 325 static enum drm_connector_status
 326 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 327 {
 328         struct intel_connector *intel_connector = to_intel_connector(connector);
 329         struct intel_dp *intel_dp = intel_connector->mst_port;
 330
 331         if (!intel_dp)
 332                 return connector_status_disconnected;
 333         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
 334 }
 335
 336 static int
 337 intel_dp_mst_set_property(struct drm_connector *connector,
 338                           struct drm_property *property,
 339                           uint64_t val)
 340 {
 341         return 0;
 342 }
 343
 344 static void
 345 intel_dp_mst_connector_destroy(struct drm_connector *connector)
 346 {
 347         struct intel_connector *intel_connector = to_intel_connector(connector);
 348
 349         if (!IS_ERR_OR_NULL(intel_connector->edid))
 350                 kfree(intel_connector->edid);
 351
 352         drm_connector_cleanup(connector);
 353         kfree(connector);
 354 }
 355
 356 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 357         .dpms = drm_atomic_helper_connector_dpms,
 358         .detect = intel_dp_mst_detect,
 359         .fill_modes = drm_helper_probe_single_connector_modes,
 360         .set_property = intel_dp_mst_set_property,
 361         .atomic_get_property = intel_connector_atomic_get_property,
 362         .destroy = intel_dp_mst_connector_destroy,
 363         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 364         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 365 };
 366
 367 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 368 {
 369         return intel_dp_mst_get_ddc_modes(connector);
 370 }
 371
 372 static enum drm_mode_status
 373 intel_dp_mst_mode_valid(struct drm_connector *connector,
 374                         struct drm_display_mode *mode)
 375 {
 376         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 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->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 };
 418 #endif
 419
 420 #if 0 /* unused */
 421 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 422 {
 423         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 424
 425         drm_encoder_cleanup(encoder);
 426         kfree(intel_mst);
 427 }
 428
 429 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 430         .destroy = intel_dp_mst_encoder_destroy,
 431 };
 432 #endif
 433
 434 #if 0
 435 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 436 {
 437         if (connector->encoder && connector->base.state->crtc) {
 438                 enum pipe pipe;
 439                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 440                         return false;
 441                 return true;
 442         }
 443         return false;
 444 }
 445
 446 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
 447 {
 448 #ifdef CONFIG_DRM_FBDEV_EMULATION
 449         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 450
 451         if (dev_priv->fbdev)
 452                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 453                                                 &connector->base);
 454 #endif
 455 }
 456
 457 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
 458 {
 459 #ifdef CONFIG_DRM_FBDEV_EMULATION
 460         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 461
 462         if (dev_priv->fbdev)
 463                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 464                                                    &connector->base);
 465 #endif
 466 }
 467
 468 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)
 469 {
 470         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 471         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 472         struct drm_device *dev = intel_dig_port->base.base.dev;
 473         struct intel_connector *intel_connector;
 474         struct drm_connector *connector;
 475         int i;
 476
 477         intel_connector = intel_connector_alloc();
 478         if (!intel_connector)
 479                 return NULL;
 480
 481         connector = &intel_connector->base;
 482         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 483         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 484
 485         intel_connector->unregister = intel_connector_unregister;
 486         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 487         intel_connector->mst_port = intel_dp;
 488         intel_connector->port = port;
 489
 490         for (i = PIPE_A; i <= PIPE_C; i++) {
 491                 drm_mode_connector_attach_encoder(&intel_connector->base,
 492                                                   &intel_dp->mst_encoders[i]->base.base);
 493         }
 494         intel_dp_add_properties(intel_dp, connector);
 495
 496         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 497         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 498
 499         drm_mode_connector_set_path_property(connector, pathprop);
 500         return connector;
 501 }
 502
 503 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 504 {
 505         struct intel_connector *intel_connector = to_intel_connector(connector);
 506         struct drm_device *dev = connector->dev;
 507         drm_modeset_lock_all(dev);
 508         intel_connector_add_to_fbdev(intel_connector);
 509         drm_modeset_unlock_all(dev);
 510         drm_connector_register(&intel_connector->base);
 511 }
 512
 513 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 514                                            struct drm_connector *connector)
 515 {
 516         struct intel_connector *intel_connector = to_intel_connector(connector);
 517         struct drm_device *dev = connector->dev;
 518
 519         intel_connector->unregister(intel_connector);
 520
 521         /* need to nuke the connector */
 522         drm_modeset_lock_all(dev);
 523         intel_connector_remove_from_fbdev(intel_connector);
 524         intel_connector->mst_port = NULL;
 525         drm_modeset_unlock_all(dev);
 526
 527         drm_connector_unreference(&intel_connector->base);
 528         DRM_DEBUG_KMS("\n");
 529 }
 530
 531 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 532 {
 533         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 534         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 535         struct drm_device *dev = intel_dig_port->base.base.dev;
 536
 537         drm_kms_helper_hotplug_event(dev);
 538 }
 539
 540 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 541         .add_connector = intel_dp_add_mst_connector,
 542         .register_connector = intel_dp_register_mst_connector,
 543         .destroy_connector = intel_dp_destroy_mst_connector,
 544         .hotplug = intel_dp_mst_hotplug,
 545 };
 546
 547 static struct intel_dp_mst_encoder *
 548 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 549 {
 550         struct intel_dp_mst_encoder *intel_mst;
 551         struct intel_encoder *intel_encoder;
 552         struct drm_device *dev = intel_dig_port->base.base.dev;
 553
 554         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 555
 556         if (!intel_mst)
 557                 return NULL;
 558
 559         intel_mst->pipe = pipe;
 560         intel_encoder = &intel_mst->base;
 561         intel_mst->primary = intel_dig_port;
 562
 563         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 564                          DRM_MODE_ENCODER_DPMST, NULL);
 565
 566         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 567         intel_encoder->crtc_mask = 0x7;
 568         intel_encoder->cloneable = 0;
 569
 570         intel_encoder->compute_config = intel_dp_mst_compute_config;
 571         intel_encoder->disable = intel_mst_disable_dp;
 572         intel_encoder->post_disable = intel_mst_post_disable_dp;
 573         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 574         intel_encoder->enable = intel_mst_enable_dp;
 575         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 576         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 577
 578         return intel_mst;
 579
 580 }
 581
 582 static bool
 583 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 584 {
 585         int i;
 586         struct intel_dp *intel_dp = &intel_dig_port->dp;
 587
 588         for (i = PIPE_A; i <= PIPE_C; i++)
 589                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
 590         return true;
 591 }
 592 #endif
 593
 594 int
 595 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 596 {
 597         struct intel_dp *intel_dp = &intel_dig_port->dp;
 598 #if 0
 599         struct drm_device *dev = intel_dig_port->base.base.dev;
 600         int ret;
 601
 602         intel_dp->can_mst = true;
 603         intel_dp->mst_mgr.cbs = &mst_cbs;
 604
 605         /* create encoders */
 606         intel_dp_create_fake_mst_encoders(intel_dig_port);
 607         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
 608         if (ret) {
 609                 intel_dp->can_mst = false;
 610                 return ret;
 611         }
 612 #endif
 613         intel_dp->can_mst = false;
 614         return 0;
 615 }
 616
 617 void
 618 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 619 {
 620         struct intel_dp *intel_dp = &intel_dig_port->dp;
 621
 622         if (!intel_dp->can_mst)
 623                 return;
 624
 625 #if 0
 626         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 627 #endif
 628         /* encoders will get killed by normal cleanup */
 629 }