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 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 421 { 422 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 423 424 drm_encoder_cleanup(encoder); 425 kfree(intel_mst); 426 } 427 428 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 429 .destroy = intel_dp_mst_encoder_destroy, 430 }; 431 432 #if 0 433 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 434 { 435 if (connector->encoder && connector->base.state->crtc) { 436 enum pipe pipe; 437 if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) 438 return false; 439 return true; 440 } 441 return false; 442 } 443 444 static void intel_connector_add_to_fbdev(struct intel_connector *connector) 445 { 446 #ifdef CONFIG_DRM_FBDEV_EMULATION 447 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 448 449 if (dev_priv->fbdev) 450 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, 451 &connector->base); 452 #endif 453 } 454 455 static void intel_connector_remove_from_fbdev(struct intel_connector *connector) 456 { 457 #ifdef CONFIG_DRM_FBDEV_EMULATION 458 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 459 460 if (dev_priv->fbdev) 461 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, 462 &connector->base); 463 #endif 464 } 465 466 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) 467 { 468 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 469 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 470 struct drm_device *dev = intel_dig_port->base.base.dev; 471 struct intel_connector *intel_connector; 472 struct drm_connector *connector; 473 int i; 474 475 intel_connector = intel_connector_alloc(); 476 if (!intel_connector) 477 return NULL; 478 479 connector = &intel_connector->base; 480 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); 481 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 482 483 intel_connector->unregister = intel_connector_unregister; 484 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 485 intel_connector->mst_port = intel_dp; 486 intel_connector->port = port; 487 488 for (i = PIPE_A; i <= PIPE_C; i++) { 489 drm_mode_connector_attach_encoder(&intel_connector->base, 490 &intel_dp->mst_encoders[i]->base.base); 491 } 492 intel_dp_add_properties(intel_dp, connector); 493 494 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 495 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 496 497 drm_mode_connector_set_path_property(connector, pathprop); 498 return connector; 499 } 500 501 static void intel_dp_register_mst_connector(struct drm_connector *connector) 502 { 503 struct intel_connector *intel_connector = to_intel_connector(connector); 504 struct drm_device *dev = connector->dev; 505 drm_modeset_lock_all(dev); 506 intel_connector_add_to_fbdev(intel_connector); 507 drm_modeset_unlock_all(dev); 508 drm_connector_register(&intel_connector->base); 509 } 510 511 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 512 struct drm_connector *connector) 513 { 514 struct intel_connector *intel_connector = to_intel_connector(connector); 515 struct drm_device *dev = connector->dev; 516 517 intel_connector->unregister(intel_connector); 518 519 /* need to nuke the connector */ 520 drm_modeset_lock_all(dev); 521 intel_connector_remove_from_fbdev(intel_connector); 522 intel_connector->mst_port = NULL; 523 drm_modeset_unlock_all(dev); 524 525 drm_connector_unreference(&intel_connector->base); 526 DRM_DEBUG_KMS("\n"); 527 } 528 529 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr) 530 { 531 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 532 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 533 struct drm_device *dev = intel_dig_port->base.base.dev; 534 535 drm_kms_helper_hotplug_event(dev); 536 } 537 538 static const struct drm_dp_mst_topology_cbs mst_cbs = { 539 .add_connector = intel_dp_add_mst_connector, 540 .register_connector = intel_dp_register_mst_connector, 541 .destroy_connector = intel_dp_destroy_mst_connector, 542 .hotplug = intel_dp_mst_hotplug, 543 }; 544 545 static struct intel_dp_mst_encoder * 546 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 547 { 548 struct intel_dp_mst_encoder *intel_mst; 549 struct intel_encoder *intel_encoder; 550 struct drm_device *dev = intel_dig_port->base.base.dev; 551 552 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 553 554 if (!intel_mst) 555 return NULL; 556 557 intel_mst->pipe = pipe; 558 intel_encoder = &intel_mst->base; 559 intel_mst->primary = intel_dig_port; 560 561 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 562 DRM_MODE_ENCODER_DPMST, NULL); 563 564 intel_encoder->type = INTEL_OUTPUT_DP_MST; 565 intel_encoder->crtc_mask = 0x7; 566 intel_encoder->cloneable = 0; 567 568 intel_encoder->compute_config = intel_dp_mst_compute_config; 569 intel_encoder->disable = intel_mst_disable_dp; 570 intel_encoder->post_disable = intel_mst_post_disable_dp; 571 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 572 intel_encoder->enable = intel_mst_enable_dp; 573 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 574 intel_encoder->get_config = intel_dp_mst_enc_get_config; 575 576 return intel_mst; 577 578 } 579 580 static bool 581 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 582 { 583 int i; 584 struct intel_dp *intel_dp = &intel_dig_port->dp; 585 586 for (i = PIPE_A; i <= PIPE_C; i++) 587 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i); 588 return true; 589 } 590 #endif 591 592 int 593 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 594 { 595 struct intel_dp *intel_dp = &intel_dig_port->dp; 596 #if 0 597 struct drm_device *dev = intel_dig_port->base.base.dev; 598 int ret; 599 600 intel_dp->can_mst = true; 601 intel_dp->mst_mgr.cbs = &mst_cbs; 602 603 /* create encoders */ 604 intel_dp_create_fake_mst_encoders(intel_dig_port); 605 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id); 606 if (ret) { 607 intel_dp->can_mst = false; 608 return ret; 609 } 610 #endif 611 intel_dp->can_mst = false; 612 return 0; 613 } 614 615 void 616 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 617 { 618 struct intel_dp *intel_dp = &intel_dig_port->dp; 619 620 if (!intel_dp->can_mst) 621 return; 622 623 #if 0 624 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 625 #endif 626 /* encoders will get killed by normal cleanup */ 627 } 628