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->uapi.state; 46 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 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->hw.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 false); 66 67 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr, 68 port, crtc_state->pbn, 0); 69 if (slots == -EDEADLK) 70 return slots; 71 if (slots >= 0) 72 break; 73 } 74 75 if (slots < 0) { 76 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots); 77 return slots; 78 } 79 80 intel_link_compute_m_n(crtc_state->pipe_bpp, 81 crtc_state->lane_count, 82 adjusted_mode->crtc_clock, 83 crtc_state->port_clock, 84 &crtc_state->dp_m_n, 85 constant_n, crtc_state->fec_enable); 86 crtc_state->dp_m_n.tu = slots; 87 88 return 0; 89 } 90 91 /* 92 * Iterate over all connectors and return the smallest transcoder in the MST 93 * stream 94 */ 95 static enum transcoder 96 intel_dp_mst_master_trans_compute(struct intel_atomic_state *state, 97 struct intel_dp *mst_port) 98 { 99 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 100 struct intel_digital_connector_state *conn_state; 101 struct intel_connector *connector; 102 enum pipe ret = I915_MAX_PIPES; 103 int i; 104 105 if (INTEL_GEN(dev_priv) < 12) 106 return INVALID_TRANSCODER; 107 108 for_each_new_intel_connector_in_state(state, connector, conn_state, i) { 109 struct intel_crtc_state *crtc_state; 110 struct intel_crtc *crtc; 111 112 if (connector->mst_port != mst_port || !conn_state->base.crtc) 113 continue; 114 115 crtc = to_intel_crtc(conn_state->base.crtc); 116 crtc_state = intel_atomic_get_new_crtc_state(state, crtc); 117 if (!crtc_state->uapi.active) 118 continue; 119 120 /* 121 * Using crtc->pipe because crtc_state->cpu_transcoder is 122 * computed, so others CRTCs could have non-computed 123 * cpu_transcoder 124 */ 125 if (crtc->pipe < ret) 126 ret = crtc->pipe; 127 } 128 129 if (ret == I915_MAX_PIPES) 130 return INVALID_TRANSCODER; 131 132 /* Simple cast works because TGL don't have a eDP transcoder */ 133 return (enum transcoder)ret; 134 } 135 136 static int intel_dp_mst_compute_config(struct intel_encoder *encoder, 137 struct intel_crtc_state *pipe_config, 138 struct drm_connector_state *conn_state) 139 { 140 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state); 141 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 142 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 143 struct intel_dp *intel_dp = &intel_mst->primary->dp; 144 struct intel_connector *connector = 145 to_intel_connector(conn_state->connector); 146 struct intel_digital_connector_state *intel_conn_state = 147 to_intel_digital_connector_state(conn_state); 148 const struct drm_display_mode *adjusted_mode = 149 &pipe_config->hw.adjusted_mode; 150 void *port = connector->port; 151 struct link_config_limits limits; 152 int ret; 153 154 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 155 return -EINVAL; 156 157 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 158 pipe_config->has_pch_encoder = false; 159 160 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO) 161 pipe_config->has_audio = 162 drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port); 163 else 164 pipe_config->has_audio = 165 intel_conn_state->force_audio == HDMI_AUDIO_ON; 166 167 /* 168 * for MST we always configure max link bw - the spec doesn't 169 * seem to suggest we should do otherwise. 170 */ 171 limits.min_clock = 172 limits.max_clock = intel_dp_max_link_rate(intel_dp); 173 174 limits.min_lane_count = 175 limits.max_lane_count = intel_dp_max_lane_count(intel_dp); 176 177 limits.min_bpp = intel_dp_min_bpp(pipe_config); 178 /* 179 * FIXME: If all the streams can't fit into the link with 180 * their current pipe_bpp we should reduce pipe_bpp across 181 * the board until things start to fit. Until then we 182 * limit to <= 8bpc since that's what was hardcoded for all 183 * MST streams previously. This hack should be removed once 184 * we have the proper retry logic in place. 185 */ 186 limits.max_bpp = min(pipe_config->pipe_bpp, 24); 187 188 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits); 189 190 ret = intel_dp_mst_compute_link_config(encoder, pipe_config, 191 conn_state, &limits); 192 if (ret) 193 return ret; 194 195 pipe_config->limited_color_range = 196 intel_dp_limited_color_range(pipe_config, conn_state); 197 198 if (IS_GEN9_LP(dev_priv)) 199 pipe_config->lane_lat_optim_mask = 200 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); 201 202 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); 203 204 pipe_config->mst_master_transcoder = intel_dp_mst_master_trans_compute(state, intel_dp); 205 206 return 0; 207 } 208 209 /* 210 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs 211 * that shares the same MST stream as mode changed, 212 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do 213 * a fastset when possible. 214 */ 215 static int 216 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector, 217 struct intel_atomic_state *state) 218 { 219 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 220 struct drm_connector_list_iter connector_list_iter; 221 struct intel_connector *connector_iter; 222 223 if (INTEL_GEN(dev_priv) < 12) 224 return 0; 225 226 if (!intel_connector_needs_modeset(state, &connector->base)) 227 return 0; 228 229 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter); 230 for_each_intel_connector_iter(connector_iter, &connector_list_iter) { 231 struct intel_digital_connector_state *conn_iter_state; 232 struct intel_crtc_state *crtc_state; 233 struct intel_crtc *crtc; 234 int ret; 235 236 if (connector_iter->mst_port != connector->mst_port || 237 connector_iter == connector) 238 continue; 239 240 conn_iter_state = intel_atomic_get_digital_connector_state(state, 241 connector_iter); 242 if (IS_ERR(conn_iter_state)) { 243 drm_connector_list_iter_end(&connector_list_iter); 244 return PTR_ERR(conn_iter_state); 245 } 246 247 if (!conn_iter_state->base.crtc) 248 continue; 249 250 crtc = to_intel_crtc(conn_iter_state->base.crtc); 251 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); 252 if (IS_ERR(crtc_state)) { 253 drm_connector_list_iter_end(&connector_list_iter); 254 return PTR_ERR(crtc_state); 255 } 256 257 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base); 258 if (ret) { 259 drm_connector_list_iter_end(&connector_list_iter); 260 return ret; 261 } 262 crtc_state->uapi.mode_changed = true; 263 } 264 drm_connector_list_iter_end(&connector_list_iter); 265 266 return 0; 267 } 268 269 static int 270 intel_dp_mst_atomic_check(struct drm_connector *connector, 271 struct drm_atomic_state *_state) 272 { 273 struct intel_atomic_state *state = to_intel_atomic_state(_state); 274 struct drm_connector_state *new_conn_state = 275 drm_atomic_get_new_connector_state(&state->base, connector); 276 struct drm_connector_state *old_conn_state = 277 drm_atomic_get_old_connector_state(&state->base, connector); 278 struct intel_connector *intel_connector = 279 to_intel_connector(connector); 280 struct drm_crtc *new_crtc = new_conn_state->crtc; 281 struct drm_dp_mst_topology_mgr *mgr; 282 int ret; 283 284 ret = intel_digital_connector_atomic_check(connector, &state->base); 285 if (ret) 286 return ret; 287 288 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state); 289 if (ret) 290 return ret; 291 292 if (!old_conn_state->crtc) 293 return 0; 294 295 /* We only want to free VCPI if this state disables the CRTC on this 296 * connector 297 */ 298 if (new_crtc) { 299 struct intel_crtc *intel_crtc = to_intel_crtc(new_crtc); 300 struct intel_crtc_state *crtc_state = 301 intel_atomic_get_new_crtc_state(state, intel_crtc); 302 303 if (!crtc_state || 304 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) || 305 crtc_state->uapi.enable) 306 return 0; 307 } 308 309 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr; 310 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr, 311 intel_connector->port); 312 313 return ret; 314 } 315 316 static void intel_mst_disable_dp(struct intel_encoder *encoder, 317 const struct intel_crtc_state *old_crtc_state, 318 const struct drm_connector_state *old_conn_state) 319 { 320 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 321 struct intel_digital_port *intel_dig_port = intel_mst->primary; 322 struct intel_dp *intel_dp = &intel_dig_port->dp; 323 struct intel_connector *connector = 324 to_intel_connector(old_conn_state->connector); 325 int ret; 326 327 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 328 329 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); 330 331 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 332 if (ret) { 333 DRM_DEBUG_KMS("failed to update payload %d\n", ret); 334 } 335 if (old_crtc_state->has_audio) 336 intel_audio_codec_disable(encoder, 337 old_crtc_state, old_conn_state); 338 } 339 340 static void intel_mst_post_disable_dp(struct intel_encoder *encoder, 341 const struct intel_crtc_state *old_crtc_state, 342 const struct drm_connector_state *old_conn_state) 343 { 344 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 345 struct intel_digital_port *intel_dig_port = intel_mst->primary; 346 struct intel_dp *intel_dp = &intel_dig_port->dp; 347 struct intel_connector *connector = 348 to_intel_connector(old_conn_state->connector); 349 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 350 bool last_mst_stream; 351 u32 val; 352 353 intel_dp->active_mst_links--; 354 last_mst_stream = intel_dp->active_mst_links == 0; 355 WARN_ON(INTEL_GEN(dev_priv) >= 12 && last_mst_stream && 356 !intel_dp_mst_is_master_trans(old_crtc_state)); 357 358 intel_crtc_vblank_off(old_crtc_state); 359 360 intel_disable_pipe(old_crtc_state); 361 362 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 363 364 val = I915_READ(TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder)); 365 val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC; 366 I915_WRITE(TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder), val); 367 368 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 369 DP_TP_STATUS_ACT_SENT, 1)) 370 DRM_ERROR("Timed out waiting for ACT sent when disabling\n"); 371 drm_dp_check_act_status(&intel_dp->mst_mgr); 372 373 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); 374 375 intel_ddi_disable_transcoder_func(old_crtc_state); 376 377 if (INTEL_GEN(dev_priv) >= 9) 378 skl_scaler_disable(old_crtc_state); 379 else 380 ilk_pfit_disable(old_crtc_state); 381 382 /* 383 * Power down mst path before disabling the port, otherwise we end 384 * up getting interrupts from the sink upon detecting link loss. 385 */ 386 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, 387 false); 388 /* 389 * From TGL spec: "If multi-stream slave transcoder: Configure 390 * Transcoder Clock Select to direct no clock to the transcoder" 391 * 392 * From older GENs spec: "Configure Transcoder Clock Select to direct 393 * no clock to the transcoder" 394 */ 395 if (INTEL_GEN(dev_priv) < 12 || !last_mst_stream) 396 intel_ddi_disable_pipe_clock(old_crtc_state); 397 398 399 intel_mst->connector = NULL; 400 if (last_mst_stream) 401 intel_dig_port->base.post_disable(&intel_dig_port->base, 402 old_crtc_state, NULL); 403 404 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 405 } 406 407 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder, 408 const struct intel_crtc_state *pipe_config, 409 const struct drm_connector_state *conn_state) 410 { 411 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 412 struct intel_digital_port *intel_dig_port = intel_mst->primary; 413 struct intel_dp *intel_dp = &intel_dig_port->dp; 414 415 if (intel_dp->active_mst_links == 0) 416 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base, 417 pipe_config, NULL); 418 } 419 420 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, 421 const struct intel_crtc_state *pipe_config, 422 const struct drm_connector_state *conn_state) 423 { 424 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 425 struct intel_digital_port *intel_dig_port = intel_mst->primary; 426 struct intel_dp *intel_dp = &intel_dig_port->dp; 427 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 428 struct intel_connector *connector = 429 to_intel_connector(conn_state->connector); 430 int ret; 431 u32 temp; 432 bool first_mst_stream; 433 434 /* MST encoders are bound to a crtc, not to a connector, 435 * force the mapping here for get_hw_state. 436 */ 437 connector->encoder = encoder; 438 intel_mst->connector = connector; 439 first_mst_stream = intel_dp->active_mst_links == 0; 440 WARN_ON(INTEL_GEN(dev_priv) >= 12 && first_mst_stream && 441 !intel_dp_mst_is_master_trans(pipe_config)); 442 443 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 444 445 if (first_mst_stream) 446 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 447 448 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); 449 450 if (first_mst_stream) 451 intel_dig_port->base.pre_enable(&intel_dig_port->base, 452 pipe_config, NULL); 453 454 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 455 connector->port, 456 pipe_config->pbn, 457 pipe_config->dp_m_n.tu); 458 if (!ret) 459 DRM_ERROR("failed to allocate vcpi\n"); 460 461 intel_dp->active_mst_links++; 462 temp = I915_READ(intel_dp->regs.dp_tp_status); 463 I915_WRITE(intel_dp->regs.dp_tp_status, temp); 464 465 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 466 467 /* 468 * Before Gen 12 this is not done as part of 469 * intel_dig_port->base.pre_enable() and should be done here. For 470 * Gen 12+ the step in which this should be done is different for the 471 * first MST stream, so it's done on the DDI for the first stream and 472 * here for the following ones. 473 */ 474 if (INTEL_GEN(dev_priv) < 12 || !first_mst_stream) 475 intel_ddi_enable_pipe_clock(pipe_config); 476 477 intel_ddi_set_dp_msa(pipe_config, conn_state); 478 } 479 480 static void intel_mst_enable_dp(struct intel_encoder *encoder, 481 const struct intel_crtc_state *pipe_config, 482 const struct drm_connector_state *conn_state) 483 { 484 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 485 struct intel_digital_port *intel_dig_port = intel_mst->primary; 486 struct intel_dp *intel_dp = &intel_dig_port->dp; 487 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 488 489 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 490 491 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 492 DP_TP_STATUS_ACT_SENT, 1)) 493 DRM_ERROR("Timed out waiting for ACT sent\n"); 494 495 drm_dp_check_act_status(&intel_dp->mst_mgr); 496 497 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 498 if (pipe_config->has_audio) 499 intel_audio_codec_enable(encoder, pipe_config, conn_state); 500 } 501 502 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 503 enum pipe *pipe) 504 { 505 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 506 *pipe = intel_mst->pipe; 507 if (intel_mst->connector) 508 return true; 509 return false; 510 } 511 512 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 513 struct intel_crtc_state *pipe_config) 514 { 515 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 516 struct intel_digital_port *intel_dig_port = intel_mst->primary; 517 518 intel_ddi_get_config(&intel_dig_port->base, pipe_config); 519 } 520 521 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 522 { 523 struct intel_connector *intel_connector = to_intel_connector(connector); 524 struct intel_dp *intel_dp = intel_connector->mst_port; 525 struct edid *edid; 526 int ret; 527 528 if (drm_connector_is_unregistered(connector)) 529 return intel_connector_update_modes(connector, NULL); 530 531 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 532 ret = intel_connector_update_modes(connector, edid); 533 kfree(edid); 534 535 return ret; 536 } 537 538 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 539 .fill_modes = drm_helper_probe_single_connector_modes, 540 .atomic_get_property = intel_digital_connector_atomic_get_property, 541 .atomic_set_property = intel_digital_connector_atomic_set_property, 542 .late_register = intel_connector_register, 543 .early_unregister = intel_connector_unregister, 544 .destroy = intel_connector_destroy, 545 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 546 .atomic_duplicate_state = intel_digital_connector_duplicate_state, 547 }; 548 549 static int intel_dp_mst_get_modes(struct drm_connector *connector) 550 { 551 return intel_dp_mst_get_ddc_modes(connector); 552 } 553 554 static enum drm_mode_status 555 intel_dp_mst_mode_valid(struct drm_connector *connector, 556 struct drm_display_mode *mode) 557 { 558 struct drm_i915_private *dev_priv = to_i915(connector->dev); 559 struct intel_connector *intel_connector = to_intel_connector(connector); 560 struct intel_dp *intel_dp = intel_connector->mst_port; 561 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 562 int max_rate, mode_rate, max_lanes, max_link_clock; 563 564 if (drm_connector_is_unregistered(connector)) 565 return MODE_ERROR; 566 567 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 568 return MODE_NO_DBLESCAN; 569 570 max_link_clock = intel_dp_max_link_rate(intel_dp); 571 max_lanes = intel_dp_max_lane_count(intel_dp); 572 573 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); 574 mode_rate = intel_dp_link_required(mode->clock, 18); 575 576 /* TODO - validate mode against available PBN for link */ 577 if (mode->clock < 10000) 578 return MODE_CLOCK_LOW; 579 580 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 581 return MODE_H_ILLEGAL; 582 583 if (mode_rate > max_rate || mode->clock > max_dotclk) 584 return MODE_CLOCK_HIGH; 585 586 return intel_mode_valid_max_plane_size(dev_priv, mode); 587 } 588 589 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 590 struct drm_connector_state *state) 591 { 592 struct intel_connector *intel_connector = to_intel_connector(connector); 593 struct intel_dp *intel_dp = intel_connector->mst_port; 594 struct intel_crtc *crtc = to_intel_crtc(state->crtc); 595 596 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 597 } 598 599 static int 600 intel_dp_mst_detect(struct drm_connector *connector, 601 struct drm_modeset_acquire_ctx *ctx, bool force) 602 { 603 struct intel_connector *intel_connector = to_intel_connector(connector); 604 struct intel_dp *intel_dp = intel_connector->mst_port; 605 606 if (drm_connector_is_unregistered(connector)) 607 return connector_status_disconnected; 608 609 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr, 610 intel_connector->port); 611 } 612 613 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 614 .get_modes = intel_dp_mst_get_modes, 615 .mode_valid = intel_dp_mst_mode_valid, 616 .atomic_best_encoder = intel_mst_atomic_best_encoder, 617 .atomic_check = intel_dp_mst_atomic_check, 618 .detect_ctx = intel_dp_mst_detect, 619 }; 620 621 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 622 { 623 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder)); 624 625 drm_encoder_cleanup(encoder); 626 kfree(intel_mst); 627 } 628 629 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 630 .destroy = intel_dp_mst_encoder_destroy, 631 }; 632 633 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 634 { 635 if (connector->encoder && connector->base.state->crtc) { 636 enum pipe pipe; 637 if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) 638 return false; 639 return true; 640 } 641 return false; 642 } 643 644 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) 645 { 646 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 647 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 648 struct drm_device *dev = intel_dig_port->base.base.dev; 649 struct drm_i915_private *dev_priv = to_i915(dev); 650 struct intel_connector *intel_connector; 651 struct drm_connector *connector; 652 enum pipe pipe; 653 int ret; 654 655 intel_connector = intel_connector_alloc(); 656 if (!intel_connector) 657 return NULL; 658 659 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 660 intel_connector->mst_port = intel_dp; 661 intel_connector->port = port; 662 drm_dp_mst_get_port_malloc(port); 663 664 connector = &intel_connector->base; 665 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, 666 DRM_MODE_CONNECTOR_DisplayPort); 667 if (ret) { 668 intel_connector_free(intel_connector); 669 return NULL; 670 } 671 672 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 673 674 for_each_pipe(dev_priv, pipe) { 675 struct drm_encoder *enc = 676 &intel_dp->mst_encoders[pipe]->base.base; 677 678 ret = drm_connector_attach_encoder(&intel_connector->base, enc); 679 if (ret) 680 goto err; 681 } 682 683 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 684 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 685 686 ret = drm_connector_set_path_property(connector, pathprop); 687 if (ret) 688 goto err; 689 690 intel_attach_force_audio_property(connector); 691 intel_attach_broadcast_rgb_property(connector); 692 693 /* 694 * Reuse the prop from the SST connector because we're 695 * not allowed to create new props after device registration. 696 */ 697 connector->max_bpc_property = 698 intel_dp->attached_connector->base.max_bpc_property; 699 if (connector->max_bpc_property) 700 drm_connector_attach_max_bpc_property(connector, 6, 12); 701 702 return connector; 703 704 err: 705 drm_connector_cleanup(connector); 706 return NULL; 707 } 708 709 static void intel_dp_register_mst_connector(struct drm_connector *connector) 710 { 711 struct drm_i915_private *dev_priv = to_i915(connector->dev); 712 713 if (dev_priv->fbdev) 714 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, 715 connector); 716 717 drm_connector_register(connector); 718 } 719 720 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 721 struct drm_connector *connector) 722 { 723 struct drm_i915_private *dev_priv = to_i915(connector->dev); 724 725 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name); 726 drm_connector_unregister(connector); 727 728 if (dev_priv->fbdev) 729 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, 730 connector); 731 732 drm_connector_put(connector); 733 } 734 735 static const struct drm_dp_mst_topology_cbs mst_cbs = { 736 .add_connector = intel_dp_add_mst_connector, 737 .register_connector = intel_dp_register_mst_connector, 738 .destroy_connector = intel_dp_destroy_mst_connector, 739 }; 740 741 static struct intel_dp_mst_encoder * 742 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 743 { 744 struct intel_dp_mst_encoder *intel_mst; 745 struct intel_encoder *intel_encoder; 746 struct drm_device *dev = intel_dig_port->base.base.dev; 747 748 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 749 750 if (!intel_mst) 751 return NULL; 752 753 intel_mst->pipe = pipe; 754 intel_encoder = &intel_mst->base; 755 intel_mst->primary = intel_dig_port; 756 757 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 758 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); 759 760 intel_encoder->type = INTEL_OUTPUT_DP_MST; 761 intel_encoder->power_domain = intel_dig_port->base.power_domain; 762 intel_encoder->port = intel_dig_port->base.port; 763 intel_encoder->cloneable = 0; 764 /* 765 * This is wrong, but broken userspace uses the intersection 766 * of possible_crtcs of all the encoders of a given connector 767 * to figure out which crtcs can drive said connector. What 768 * should be used instead is the union of possible_crtcs. 769 * To keep such userspace functioning we must misconfigure 770 * this to make sure the intersection is not empty :( 771 */ 772 intel_encoder->pipe_mask = ~0; 773 774 intel_encoder->compute_config = intel_dp_mst_compute_config; 775 intel_encoder->disable = intel_mst_disable_dp; 776 intel_encoder->post_disable = intel_mst_post_disable_dp; 777 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; 778 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 779 intel_encoder->enable = intel_mst_enable_dp; 780 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 781 intel_encoder->get_config = intel_dp_mst_enc_get_config; 782 783 return intel_mst; 784 785 } 786 787 static bool 788 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 789 { 790 struct intel_dp *intel_dp = &intel_dig_port->dp; 791 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev); 792 enum pipe pipe; 793 794 for_each_pipe(dev_priv, pipe) 795 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe); 796 return true; 797 } 798 799 int 800 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port) 801 { 802 return intel_dig_port->dp.active_mst_links; 803 } 804 805 int 806 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 807 { 808 struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); 809 struct intel_dp *intel_dp = &intel_dig_port->dp; 810 enum port port = intel_dig_port->base.port; 811 int ret; 812 813 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) 814 return 0; 815 816 if (INTEL_GEN(i915) < 12 && port == PORT_A) 817 return 0; 818 819 if (INTEL_GEN(i915) < 11 && port == PORT_E) 820 return 0; 821 822 intel_dp->mst_mgr.cbs = &mst_cbs; 823 824 /* create encoders */ 825 intel_dp_create_fake_mst_encoders(intel_dig_port); 826 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, 827 &intel_dp->aux, 16, 3, conn_base_id); 828 if (ret) 829 return ret; 830 831 intel_dp->can_mst = true; 832 833 return 0; 834 } 835 836 void 837 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 838 { 839 struct intel_dp *intel_dp = &intel_dig_port->dp; 840 841 if (!intel_dp->can_mst) 842 return; 843 844 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 845 /* encoders will get killed by normal cleanup */ 846 } 847 848 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state) 849 { 850 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder; 851 } 852 853 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state) 854 { 855 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER && 856 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder; 857 } 858