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 } 630