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_display_types.h" 36 #include "intel_dp.h" 37 #include "intel_dp_mst.h" 38 #include "intel_dpio_phy.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, crtc_state->fec_enable); 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 /* 132 * FIXME: If all the streams can't fit into the link with 133 * their current pipe_bpp we should reduce pipe_bpp across 134 * the board until things start to fit. Until then we 135 * limit to <= 8bpc since that's what was hardcoded for all 136 * MST streams previously. This hack should be removed once 137 * we have the proper retry logic in place. 138 */ 139 limits.max_bpp = min(pipe_config->pipe_bpp, 24); 140 141 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits); 142 143 ret = intel_dp_mst_compute_link_config(encoder, pipe_config, 144 conn_state, &limits); 145 if (ret) 146 return ret; 147 148 pipe_config->limited_color_range = 149 intel_dp_limited_color_range(pipe_config, conn_state); 150 151 if (IS_GEN9_LP(dev_priv)) 152 pipe_config->lane_lat_optim_mask = 153 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); 154 155 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); 156 157 return 0; 158 } 159 160 static int 161 intel_dp_mst_atomic_check(struct drm_connector *connector, 162 struct drm_atomic_state *state) 163 { 164 struct drm_connector_state *new_conn_state = 165 drm_atomic_get_new_connector_state(state, connector); 166 struct drm_connector_state *old_conn_state = 167 drm_atomic_get_old_connector_state(state, connector); 168 struct intel_connector *intel_connector = 169 to_intel_connector(connector); 170 struct drm_crtc *new_crtc = new_conn_state->crtc; 171 struct drm_crtc_state *crtc_state; 172 struct drm_dp_mst_topology_mgr *mgr; 173 int ret; 174 175 ret = intel_digital_connector_atomic_check(connector, state); 176 if (ret) 177 return ret; 178 179 if (!old_conn_state->crtc) 180 return 0; 181 182 /* We only want to free VCPI if this state disables the CRTC on this 183 * connector 184 */ 185 if (new_crtc) { 186 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc); 187 188 if (!crtc_state || 189 !drm_atomic_crtc_needs_modeset(crtc_state) || 190 crtc_state->enable) 191 return 0; 192 } 193 194 mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr; 195 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, 196 intel_connector->port); 197 198 return ret; 199 } 200 201 static void intel_mst_disable_dp(struct intel_encoder *encoder, 202 const struct intel_crtc_state *old_crtc_state, 203 const struct drm_connector_state *old_conn_state) 204 { 205 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 206 struct intel_digital_port *intel_dig_port = intel_mst->primary; 207 struct intel_dp *intel_dp = &intel_dig_port->dp; 208 struct intel_connector *connector = 209 to_intel_connector(old_conn_state->connector); 210 int ret; 211 212 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 213 214 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); 215 216 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 217 if (ret) { 218 DRM_DEBUG_KMS("failed to update payload %d\n", ret); 219 } 220 if (old_crtc_state->has_audio) 221 intel_audio_codec_disable(encoder, 222 old_crtc_state, old_conn_state); 223 } 224 225 static void intel_mst_post_disable_dp(struct intel_encoder *encoder, 226 const struct intel_crtc_state *old_crtc_state, 227 const struct drm_connector_state *old_conn_state) 228 { 229 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 230 struct intel_digital_port *intel_dig_port = intel_mst->primary; 231 struct intel_dp *intel_dp = &intel_dig_port->dp; 232 struct intel_connector *connector = 233 to_intel_connector(old_conn_state->connector); 234 235 intel_ddi_disable_pipe_clock(old_crtc_state); 236 237 /* this can fail */ 238 drm_dp_check_act_status(&intel_dp->mst_mgr); 239 /* and this can also fail */ 240 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 241 242 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); 243 244 /* 245 * Power down mst path before disabling the port, otherwise we end 246 * up getting interrupts from the sink upon detecting link loss. 247 */ 248 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, 249 false); 250 251 intel_dp->active_mst_links--; 252 253 intel_mst->connector = NULL; 254 if (intel_dp->active_mst_links == 0) { 255 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); 256 intel_dig_port->base.post_disable(&intel_dig_port->base, 257 old_crtc_state, NULL); 258 } 259 260 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 261 } 262 263 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder, 264 const struct intel_crtc_state *pipe_config, 265 const struct drm_connector_state *conn_state) 266 { 267 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 268 struct intel_digital_port *intel_dig_port = intel_mst->primary; 269 struct intel_dp *intel_dp = &intel_dig_port->dp; 270 271 if (intel_dp->active_mst_links == 0) 272 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base, 273 pipe_config, NULL); 274 } 275 276 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder, 277 const struct intel_crtc_state *old_crtc_state, 278 const struct drm_connector_state *old_conn_state) 279 { 280 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 281 struct intel_digital_port *intel_dig_port = intel_mst->primary; 282 struct intel_dp *intel_dp = &intel_dig_port->dp; 283 284 if (intel_dp->active_mst_links == 0) 285 intel_dig_port->base.post_pll_disable(&intel_dig_port->base, 286 old_crtc_state, 287 old_conn_state); 288 } 289 290 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, 291 const struct intel_crtc_state *pipe_config, 292 const struct drm_connector_state *conn_state) 293 { 294 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 295 struct intel_digital_port *intel_dig_port = intel_mst->primary; 296 struct intel_dp *intel_dp = &intel_dig_port->dp; 297 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 298 struct intel_connector *connector = 299 to_intel_connector(conn_state->connector); 300 int ret; 301 u32 temp; 302 303 /* MST encoders are bound to a crtc, not to a connector, 304 * force the mapping here for get_hw_state. 305 */ 306 connector->encoder = encoder; 307 intel_mst->connector = connector; 308 309 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 310 311 if (intel_dp->active_mst_links == 0) 312 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 313 314 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); 315 316 if (intel_dp->active_mst_links == 0) 317 intel_dig_port->base.pre_enable(&intel_dig_port->base, 318 pipe_config, NULL); 319 320 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 321 connector->port, 322 pipe_config->pbn, 323 pipe_config->dp_m_n.tu); 324 if (!ret) 325 DRM_ERROR("failed to allocate vcpi\n"); 326 327 intel_dp->active_mst_links++; 328 temp = I915_READ(intel_dp->regs.dp_tp_status); 329 I915_WRITE(intel_dp->regs.dp_tp_status, temp); 330 331 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 332 333 intel_ddi_enable_pipe_clock(pipe_config); 334 335 intel_ddi_set_dp_msa(pipe_config, conn_state); 336 } 337 338 static void intel_mst_enable_dp(struct intel_encoder *encoder, 339 const struct intel_crtc_state *pipe_config, 340 const struct drm_connector_state *conn_state) 341 { 342 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 343 struct intel_digital_port *intel_dig_port = intel_mst->primary; 344 struct intel_dp *intel_dp = &intel_dig_port->dp; 345 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 346 347 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 348 349 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 350 DP_TP_STATUS_ACT_SENT, 1)) 351 DRM_ERROR("Timed out waiting for ACT sent\n"); 352 353 drm_dp_check_act_status(&intel_dp->mst_mgr); 354 355 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 356 if (pipe_config->has_audio) 357 intel_audio_codec_enable(encoder, pipe_config, conn_state); 358 } 359 360 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 361 enum pipe *pipe) 362 { 363 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 364 *pipe = intel_mst->pipe; 365 if (intel_mst->connector) 366 return true; 367 return false; 368 } 369 370 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 371 struct intel_crtc_state *pipe_config) 372 { 373 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 374 struct intel_digital_port *intel_dig_port = intel_mst->primary; 375 376 intel_ddi_get_config(&intel_dig_port->base, pipe_config); 377 } 378 379 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 380 { 381 struct intel_connector *intel_connector = to_intel_connector(connector); 382 struct intel_dp *intel_dp = intel_connector->mst_port; 383 struct edid *edid; 384 int ret; 385 386 if (drm_connector_is_unregistered(connector)) 387 return intel_connector_update_modes(connector, NULL); 388 389 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 390 ret = intel_connector_update_modes(connector, edid); 391 kfree(edid); 392 393 return ret; 394 } 395 396 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 397 .fill_modes = drm_helper_probe_single_connector_modes, 398 .atomic_get_property = intel_digital_connector_atomic_get_property, 399 .atomic_set_property = intel_digital_connector_atomic_set_property, 400 .late_register = intel_connector_register, 401 .early_unregister = intel_connector_unregister, 402 .destroy = intel_connector_destroy, 403 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 404 .atomic_duplicate_state = intel_digital_connector_duplicate_state, 405 }; 406 407 static int intel_dp_mst_get_modes(struct drm_connector *connector) 408 { 409 return intel_dp_mst_get_ddc_modes(connector); 410 } 411 412 static enum drm_mode_status 413 intel_dp_mst_mode_valid(struct drm_connector *connector, 414 struct drm_display_mode *mode) 415 { 416 struct drm_i915_private *dev_priv = to_i915(connector->dev); 417 struct intel_connector *intel_connector = to_intel_connector(connector); 418 struct intel_dp *intel_dp = intel_connector->mst_port; 419 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 420 int max_rate, mode_rate, max_lanes, max_link_clock; 421 422 if (drm_connector_is_unregistered(connector)) 423 return MODE_ERROR; 424 425 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 426 return MODE_NO_DBLESCAN; 427 428 max_link_clock = intel_dp_max_link_rate(intel_dp); 429 max_lanes = intel_dp_max_lane_count(intel_dp); 430 431 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); 432 mode_rate = intel_dp_link_required(mode->clock, 18); 433 434 /* TODO - validate mode against available PBN for link */ 435 if (mode->clock < 10000) 436 return MODE_CLOCK_LOW; 437 438 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 439 return MODE_H_ILLEGAL; 440 441 if (mode_rate > max_rate || mode->clock > max_dotclk) 442 return MODE_CLOCK_HIGH; 443 444 return intel_mode_valid_max_plane_size(dev_priv, mode); 445 } 446 447 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 448 struct drm_connector_state *state) 449 { 450 struct intel_connector *intel_connector = to_intel_connector(connector); 451 struct intel_dp *intel_dp = intel_connector->mst_port; 452 struct intel_crtc *crtc = to_intel_crtc(state->crtc); 453 454 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 455 } 456 457 static int 458 intel_dp_mst_detect(struct drm_connector *connector, 459 struct drm_modeset_acquire_ctx *ctx, bool force) 460 { 461 struct intel_connector *intel_connector = to_intel_connector(connector); 462 struct intel_dp *intel_dp = intel_connector->mst_port; 463 464 if (drm_connector_is_unregistered(connector)) 465 return connector_status_disconnected; 466 467 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr, 468 intel_connector->port); 469 } 470 471 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 472 .get_modes = intel_dp_mst_get_modes, 473 .mode_valid = intel_dp_mst_mode_valid, 474 .atomic_best_encoder = intel_mst_atomic_best_encoder, 475 .atomic_check = intel_dp_mst_atomic_check, 476 .detect_ctx = intel_dp_mst_detect, 477 }; 478 479 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 480 { 481 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 482 483 drm_encoder_cleanup(encoder); 484 kfree(intel_mst); 485 } 486 487 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 488 .destroy = intel_dp_mst_encoder_destroy, 489 }; 490 491 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 492 { 493 if (connector->encoder && connector->base.state->crtc) { 494 enum pipe pipe; 495 if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) 496 return false; 497 return true; 498 } 499 return false; 500 } 501 502 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) 503 { 504 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 505 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 506 struct drm_device *dev = intel_dig_port->base.base.dev; 507 struct drm_i915_private *dev_priv = to_i915(dev); 508 struct intel_connector *intel_connector; 509 struct drm_connector *connector; 510 enum pipe pipe; 511 int ret; 512 513 intel_connector = intel_connector_alloc(); 514 if (!intel_connector) 515 return NULL; 516 517 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 518 intel_connector->mst_port = intel_dp; 519 intel_connector->port = port; 520 drm_dp_mst_get_port_malloc(port); 521 522 connector = &intel_connector->base; 523 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, 524 DRM_MODE_CONNECTOR_DisplayPort); 525 if (ret) { 526 intel_connector_free(intel_connector); 527 return NULL; 528 } 529 530 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 531 532 for_each_pipe(dev_priv, pipe) { 533 struct drm_encoder *enc = 534 &intel_dp->mst_encoders[pipe]->base.base; 535 536 ret = drm_connector_attach_encoder(&intel_connector->base, enc); 537 if (ret) 538 goto err; 539 } 540 541 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 542 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 543 544 ret = drm_connector_set_path_property(connector, pathprop); 545 if (ret) 546 goto err; 547 548 intel_attach_force_audio_property(connector); 549 intel_attach_broadcast_rgb_property(connector); 550 551 /* 552 * Reuse the prop from the SST connector because we're 553 * not allowed to create new props after device registration. 554 */ 555 connector->max_bpc_property = 556 intel_dp->attached_connector->base.max_bpc_property; 557 if (connector->max_bpc_property) 558 drm_connector_attach_max_bpc_property(connector, 6, 12); 559 560 return connector; 561 562 err: 563 drm_connector_cleanup(connector); 564 return NULL; 565 } 566 567 static void intel_dp_register_mst_connector(struct drm_connector *connector) 568 { 569 struct drm_i915_private *dev_priv = to_i915(connector->dev); 570 571 if (dev_priv->fbdev) 572 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, 573 connector); 574 575 drm_connector_register(connector); 576 } 577 578 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 579 struct drm_connector *connector) 580 { 581 struct drm_i915_private *dev_priv = to_i915(connector->dev); 582 583 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name); 584 drm_connector_unregister(connector); 585 586 if (dev_priv->fbdev) 587 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, 588 connector); 589 590 drm_connector_put(connector); 591 } 592 593 static const struct drm_dp_mst_topology_cbs mst_cbs = { 594 .add_connector = intel_dp_add_mst_connector, 595 .register_connector = intel_dp_register_mst_connector, 596 .destroy_connector = intel_dp_destroy_mst_connector, 597 }; 598 599 static struct intel_dp_mst_encoder * 600 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 601 { 602 struct intel_dp_mst_encoder *intel_mst; 603 struct intel_encoder *intel_encoder; 604 struct drm_device *dev = intel_dig_port->base.base.dev; 605 606 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 607 608 if (!intel_mst) 609 return NULL; 610 611 intel_mst->pipe = pipe; 612 intel_encoder = &intel_mst->base; 613 intel_mst->primary = intel_dig_port; 614 615 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 616 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); 617 618 intel_encoder->type = INTEL_OUTPUT_DP_MST; 619 intel_encoder->power_domain = intel_dig_port->base.power_domain; 620 intel_encoder->port = intel_dig_port->base.port; 621 intel_encoder->cloneable = 0; 622 /* 623 * This is wrong, but broken userspace uses the intersection 624 * of possible_crtcs of all the encoders of a given connector 625 * to figure out which crtcs can drive said connector. What 626 * should be used instead is the union of possible_crtcs. 627 * To keep such userspace functioning we must misconfigure 628 * this to make sure the intersection is not empty :( 629 */ 630 intel_encoder->pipe_mask = ~0; 631 632 intel_encoder->compute_config = intel_dp_mst_compute_config; 633 intel_encoder->disable = intel_mst_disable_dp; 634 intel_encoder->post_disable = intel_mst_post_disable_dp; 635 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; 636 intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp; 637 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 638 intel_encoder->enable = intel_mst_enable_dp; 639 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 640 intel_encoder->get_config = intel_dp_mst_enc_get_config; 641 642 return intel_mst; 643 644 } 645 646 static bool 647 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 648 { 649 struct intel_dp *intel_dp = &intel_dig_port->dp; 650 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev); 651 enum pipe pipe; 652 653 for_each_pipe(dev_priv, pipe) 654 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe); 655 return true; 656 } 657 658 int 659 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port) 660 { 661 return intel_dig_port->dp.active_mst_links; 662 } 663 664 int 665 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 666 { 667 struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); 668 struct intel_dp *intel_dp = &intel_dig_port->dp; 669 enum port port = intel_dig_port->base.port; 670 int ret; 671 672 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) 673 return 0; 674 675 if (INTEL_GEN(i915) < 12 && port == PORT_A) 676 return 0; 677 678 if (INTEL_GEN(i915) < 11 && port == PORT_E) 679 return 0; 680 681 intel_dp->mst_mgr.cbs = &mst_cbs; 682 683 /* create encoders */ 684 intel_dp_create_fake_mst_encoders(intel_dig_port); 685 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, 686 &intel_dp->aux, 16, 3, conn_base_id); 687 if (ret) 688 return ret; 689 690 intel_dp->can_mst = true; 691 692 return 0; 693 } 694 695 void 696 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 697 { 698 struct intel_dp *intel_dp = &intel_dig_port->dp; 699 700 if (!intel_dp->can_mst) 701 return; 702 703 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 704 /* encoders will get killed by normal cleanup */ 705 } 706