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 struct drm_i915_private *i915 = to_i915(connector->base.dev); 51 const struct drm_display_mode *adjusted_mode = 52 &crtc_state->hw.adjusted_mode; 53 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 0, 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 connector->port, 69 crtc_state->pbn, 0); 70 if (slots == -EDEADLK) 71 return slots; 72 if (slots >= 0) 73 break; 74 } 75 76 if (slots < 0) { 77 drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n", 78 slots); 79 return slots; 80 } 81 82 intel_link_compute_m_n(crtc_state->pipe_bpp, 83 crtc_state->lane_count, 84 adjusted_mode->crtc_clock, 85 crtc_state->port_clock, 86 &crtc_state->dp_m_n, 87 constant_n, crtc_state->fec_enable); 88 crtc_state->dp_m_n.tu = slots; 89 90 return 0; 91 } 92 93 static int intel_dp_mst_compute_config(struct intel_encoder *encoder, 94 struct intel_crtc_state *pipe_config, 95 struct drm_connector_state *conn_state) 96 { 97 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 98 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 99 struct intel_dp *intel_dp = &intel_mst->primary->dp; 100 struct intel_connector *connector = 101 to_intel_connector(conn_state->connector); 102 struct intel_digital_connector_state *intel_conn_state = 103 to_intel_digital_connector_state(conn_state); 104 const struct drm_display_mode *adjusted_mode = 105 &pipe_config->hw.adjusted_mode; 106 struct link_config_limits limits; 107 int ret; 108 109 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 110 return -EINVAL; 111 112 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 113 pipe_config->has_pch_encoder = false; 114 115 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO) 116 pipe_config->has_audio = connector->port->has_audio; 117 else 118 pipe_config->has_audio = 119 intel_conn_state->force_audio == HDMI_AUDIO_ON; 120 121 /* 122 * for MST we always configure max link bw - the spec doesn't 123 * seem to suggest we should do otherwise. 124 */ 125 limits.min_clock = 126 limits.max_clock = intel_dp_max_link_rate(intel_dp); 127 128 limits.min_lane_count = 129 limits.max_lane_count = intel_dp_max_lane_count(intel_dp); 130 131 limits.min_bpp = intel_dp_min_bpp(pipe_config); 132 /* 133 * FIXME: If all the streams can't fit into the link with 134 * their current pipe_bpp we should reduce pipe_bpp across 135 * the board until things start to fit. Until then we 136 * limit to <= 8bpc since that's what was hardcoded for all 137 * MST streams previously. This hack should be removed once 138 * we have the proper retry logic in place. 139 */ 140 limits.max_bpp = min(pipe_config->pipe_bpp, 24); 141 142 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits); 143 144 ret = intel_dp_mst_compute_link_config(encoder, pipe_config, 145 conn_state, &limits); 146 if (ret) 147 return ret; 148 149 pipe_config->limited_color_range = 150 intel_dp_limited_color_range(pipe_config, conn_state); 151 152 if (IS_GEN9_LP(dev_priv)) 153 pipe_config->lane_lat_optim_mask = 154 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); 155 156 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); 157 158 return 0; 159 } 160 161 /* 162 * Iterate over all connectors and return a mask of 163 * all CPU transcoders streaming over the same DP link. 164 */ 165 static unsigned int 166 intel_dp_mst_transcoder_mask(struct intel_atomic_state *state, 167 struct intel_dp *mst_port) 168 { 169 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 170 const struct intel_digital_connector_state *conn_state; 171 struct intel_connector *connector; 172 u8 transcoders = 0; 173 int i; 174 175 if (INTEL_GEN(dev_priv) < 12) 176 return 0; 177 178 for_each_new_intel_connector_in_state(state, connector, conn_state, i) { 179 const struct intel_crtc_state *crtc_state; 180 struct intel_crtc *crtc; 181 182 if (connector->mst_port != mst_port || !conn_state->base.crtc) 183 continue; 184 185 crtc = to_intel_crtc(conn_state->base.crtc); 186 crtc_state = intel_atomic_get_new_crtc_state(state, crtc); 187 188 if (!crtc_state->hw.active) 189 continue; 190 191 transcoders |= BIT(crtc_state->cpu_transcoder); 192 } 193 194 return transcoders; 195 } 196 197 static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder, 198 struct intel_crtc_state *crtc_state, 199 struct drm_connector_state *conn_state) 200 { 201 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state); 202 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 203 struct intel_dp *intel_dp = &intel_mst->primary->dp; 204 205 /* lowest numbered transcoder will be designated master */ 206 crtc_state->mst_master_transcoder = 207 ffs(intel_dp_mst_transcoder_mask(state, intel_dp)) - 1; 208 209 return 0; 210 } 211 212 /* 213 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs 214 * that shares the same MST stream as mode changed, 215 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do 216 * a fastset when possible. 217 */ 218 static int 219 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector, 220 struct intel_atomic_state *state) 221 { 222 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 223 struct drm_connector_list_iter connector_list_iter; 224 struct intel_connector *connector_iter; 225 226 if (INTEL_GEN(dev_priv) < 12) 227 return 0; 228 229 if (!intel_connector_needs_modeset(state, &connector->base)) 230 return 0; 231 232 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter); 233 for_each_intel_connector_iter(connector_iter, &connector_list_iter) { 234 struct intel_digital_connector_state *conn_iter_state; 235 struct intel_crtc_state *crtc_state; 236 struct intel_crtc *crtc; 237 int ret; 238 239 if (connector_iter->mst_port != connector->mst_port || 240 connector_iter == connector) 241 continue; 242 243 conn_iter_state = intel_atomic_get_digital_connector_state(state, 244 connector_iter); 245 if (IS_ERR(conn_iter_state)) { 246 drm_connector_list_iter_end(&connector_list_iter); 247 return PTR_ERR(conn_iter_state); 248 } 249 250 if (!conn_iter_state->base.crtc) 251 continue; 252 253 crtc = to_intel_crtc(conn_iter_state->base.crtc); 254 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); 255 if (IS_ERR(crtc_state)) { 256 drm_connector_list_iter_end(&connector_list_iter); 257 return PTR_ERR(crtc_state); 258 } 259 260 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base); 261 if (ret) { 262 drm_connector_list_iter_end(&connector_list_iter); 263 return ret; 264 } 265 crtc_state->uapi.mode_changed = true; 266 } 267 drm_connector_list_iter_end(&connector_list_iter); 268 269 return 0; 270 } 271 272 static int 273 intel_dp_mst_atomic_check(struct drm_connector *connector, 274 struct drm_atomic_state *_state) 275 { 276 struct intel_atomic_state *state = to_intel_atomic_state(_state); 277 struct drm_connector_state *new_conn_state = 278 drm_atomic_get_new_connector_state(&state->base, connector); 279 struct drm_connector_state *old_conn_state = 280 drm_atomic_get_old_connector_state(&state->base, connector); 281 struct intel_connector *intel_connector = 282 to_intel_connector(connector); 283 struct drm_crtc *new_crtc = new_conn_state->crtc; 284 struct drm_dp_mst_topology_mgr *mgr; 285 int ret; 286 287 ret = intel_digital_connector_atomic_check(connector, &state->base); 288 if (ret) 289 return ret; 290 291 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state); 292 if (ret) 293 return ret; 294 295 if (!old_conn_state->crtc) 296 return 0; 297 298 /* We only want to free VCPI if this state disables the CRTC on this 299 * connector 300 */ 301 if (new_crtc) { 302 struct intel_crtc *intel_crtc = to_intel_crtc(new_crtc); 303 struct intel_crtc_state *crtc_state = 304 intel_atomic_get_new_crtc_state(state, intel_crtc); 305 306 if (!crtc_state || 307 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) || 308 crtc_state->uapi.enable) 309 return 0; 310 } 311 312 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr; 313 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr, 314 intel_connector->port); 315 316 return ret; 317 } 318 319 static void intel_mst_disable_dp(struct intel_atomic_state *state, 320 struct intel_encoder *encoder, 321 const struct intel_crtc_state *old_crtc_state, 322 const struct drm_connector_state *old_conn_state) 323 { 324 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 325 struct intel_digital_port *intel_dig_port = intel_mst->primary; 326 struct intel_dp *intel_dp = &intel_dig_port->dp; 327 struct intel_connector *connector = 328 to_intel_connector(old_conn_state->connector); 329 struct drm_i915_private *i915 = to_i915(connector->base.dev); 330 int ret; 331 332 drm_dbg_kms(&i915->drm, "active links %d\n", 333 intel_dp->active_mst_links); 334 335 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); 336 337 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 338 if (ret) { 339 drm_dbg_kms(&i915->drm, "failed to update payload %d\n", ret); 340 } 341 if (old_crtc_state->has_audio) 342 intel_audio_codec_disable(encoder, 343 old_crtc_state, old_conn_state); 344 } 345 346 static void intel_mst_post_disable_dp(struct intel_atomic_state *state, 347 struct intel_encoder *encoder, 348 const struct intel_crtc_state *old_crtc_state, 349 const struct drm_connector_state *old_conn_state) 350 { 351 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 352 struct intel_digital_port *intel_dig_port = intel_mst->primary; 353 struct intel_dp *intel_dp = &intel_dig_port->dp; 354 struct intel_connector *connector = 355 to_intel_connector(old_conn_state->connector); 356 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 357 bool last_mst_stream; 358 u32 val; 359 360 intel_dp->active_mst_links--; 361 last_mst_stream = intel_dp->active_mst_links == 0; 362 drm_WARN_ON(&dev_priv->drm, 363 INTEL_GEN(dev_priv) >= 12 && last_mst_stream && 364 !intel_dp_mst_is_master_trans(old_crtc_state)); 365 366 intel_crtc_vblank_off(old_crtc_state); 367 368 intel_disable_pipe(old_crtc_state); 369 370 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 371 372 val = intel_de_read(dev_priv, 373 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder)); 374 val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC; 375 intel_de_write(dev_priv, 376 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder), 377 val); 378 379 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 380 DP_TP_STATUS_ACT_SENT, 1)) 381 drm_err(&dev_priv->drm, 382 "Timed out waiting for ACT sent when disabling\n"); 383 drm_dp_check_act_status(&intel_dp->mst_mgr); 384 385 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); 386 387 intel_ddi_disable_transcoder_func(old_crtc_state); 388 389 if (INTEL_GEN(dev_priv) >= 9) 390 skl_scaler_disable(old_crtc_state); 391 else 392 ilk_pfit_disable(old_crtc_state); 393 394 /* 395 * Power down mst path before disabling the port, otherwise we end 396 * up getting interrupts from the sink upon detecting link loss. 397 */ 398 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, 399 false); 400 /* 401 * From TGL spec: "If multi-stream slave transcoder: Configure 402 * Transcoder Clock Select to direct no clock to the transcoder" 403 * 404 * From older GENs spec: "Configure Transcoder Clock Select to direct 405 * no clock to the transcoder" 406 */ 407 if (INTEL_GEN(dev_priv) < 12 || !last_mst_stream) 408 intel_ddi_disable_pipe_clock(old_crtc_state); 409 410 411 intel_mst->connector = NULL; 412 if (last_mst_stream) 413 intel_dig_port->base.post_disable(state, &intel_dig_port->base, 414 old_crtc_state, NULL); 415 416 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 417 intel_dp->active_mst_links); 418 } 419 420 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state, 421 struct intel_encoder *encoder, 422 const struct intel_crtc_state *pipe_config, 423 const struct drm_connector_state *conn_state) 424 { 425 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 426 struct intel_digital_port *intel_dig_port = intel_mst->primary; 427 struct intel_dp *intel_dp = &intel_dig_port->dp; 428 429 if (intel_dp->active_mst_links == 0) 430 intel_dig_port->base.pre_pll_enable(state, &intel_dig_port->base, 431 pipe_config, NULL); 432 } 433 434 static void intel_mst_pre_enable_dp(struct intel_atomic_state *state, 435 struct intel_encoder *encoder, 436 const struct intel_crtc_state *pipe_config, 437 const struct drm_connector_state *conn_state) 438 { 439 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 440 struct intel_digital_port *intel_dig_port = intel_mst->primary; 441 struct intel_dp *intel_dp = &intel_dig_port->dp; 442 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 443 struct intel_connector *connector = 444 to_intel_connector(conn_state->connector); 445 int ret; 446 u32 temp; 447 bool first_mst_stream; 448 449 /* MST encoders are bound to a crtc, not to a connector, 450 * force the mapping here for get_hw_state. 451 */ 452 connector->encoder = encoder; 453 intel_mst->connector = connector; 454 first_mst_stream = intel_dp->active_mst_links == 0; 455 drm_WARN_ON(&dev_priv->drm, 456 INTEL_GEN(dev_priv) >= 12 && first_mst_stream && 457 !intel_dp_mst_is_master_trans(pipe_config)); 458 459 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 460 intel_dp->active_mst_links); 461 462 if (first_mst_stream) 463 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 464 465 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); 466 467 if (first_mst_stream) 468 intel_dig_port->base.pre_enable(state, &intel_dig_port->base, 469 pipe_config, NULL); 470 471 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 472 connector->port, 473 pipe_config->pbn, 474 pipe_config->dp_m_n.tu); 475 if (!ret) 476 drm_err(&dev_priv->drm, "failed to allocate vcpi\n"); 477 478 intel_dp->active_mst_links++; 479 temp = intel_de_read(dev_priv, intel_dp->regs.dp_tp_status); 480 intel_de_write(dev_priv, intel_dp->regs.dp_tp_status, temp); 481 482 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 483 484 /* 485 * Before Gen 12 this is not done as part of 486 * intel_dig_port->base.pre_enable() and should be done here. For 487 * Gen 12+ the step in which this should be done is different for the 488 * first MST stream, so it's done on the DDI for the first stream and 489 * here for the following ones. 490 */ 491 if (INTEL_GEN(dev_priv) < 12 || !first_mst_stream) 492 intel_ddi_enable_pipe_clock(encoder, pipe_config); 493 494 intel_ddi_set_dp_msa(pipe_config, conn_state); 495 496 intel_dp_set_m_n(pipe_config, M1_N1); 497 } 498 499 static void intel_mst_enable_dp(struct intel_atomic_state *state, 500 struct intel_encoder *encoder, 501 const struct intel_crtc_state *pipe_config, 502 const struct drm_connector_state *conn_state) 503 { 504 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 505 struct intel_digital_port *intel_dig_port = intel_mst->primary; 506 struct intel_dp *intel_dp = &intel_dig_port->dp; 507 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 508 509 drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder); 510 511 intel_ddi_enable_transcoder_func(encoder, pipe_config); 512 513 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 514 intel_dp->active_mst_links); 515 516 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 517 DP_TP_STATUS_ACT_SENT, 1)) 518 drm_err(&dev_priv->drm, "Timed out waiting for ACT sent\n"); 519 520 drm_dp_check_act_status(&intel_dp->mst_mgr); 521 522 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 523 524 intel_enable_pipe(pipe_config); 525 526 intel_crtc_vblank_on(pipe_config); 527 528 if (pipe_config->has_audio) 529 intel_audio_codec_enable(encoder, pipe_config, conn_state); 530 } 531 532 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 533 enum pipe *pipe) 534 { 535 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 536 *pipe = intel_mst->pipe; 537 if (intel_mst->connector) 538 return true; 539 return false; 540 } 541 542 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 543 struct intel_crtc_state *pipe_config) 544 { 545 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 546 struct intel_digital_port *intel_dig_port = intel_mst->primary; 547 548 intel_ddi_get_config(&intel_dig_port->base, pipe_config); 549 } 550 551 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 552 { 553 struct intel_connector *intel_connector = to_intel_connector(connector); 554 struct intel_dp *intel_dp = intel_connector->mst_port; 555 struct edid *edid; 556 int ret; 557 558 if (drm_connector_is_unregistered(connector)) 559 return intel_connector_update_modes(connector, NULL); 560 561 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 562 ret = intel_connector_update_modes(connector, edid); 563 kfree(edid); 564 565 return ret; 566 } 567 568 static int 569 intel_dp_mst_connector_late_register(struct drm_connector *connector) 570 { 571 struct intel_connector *intel_connector = to_intel_connector(connector); 572 int ret; 573 574 ret = drm_dp_mst_connector_late_register(connector, 575 intel_connector->port); 576 if (ret < 0) 577 return ret; 578 579 ret = intel_connector_register(connector); 580 if (ret < 0) 581 drm_dp_mst_connector_early_unregister(connector, 582 intel_connector->port); 583 584 return ret; 585 } 586 587 static void 588 intel_dp_mst_connector_early_unregister(struct drm_connector *connector) 589 { 590 struct intel_connector *intel_connector = to_intel_connector(connector); 591 592 intel_connector_unregister(connector); 593 drm_dp_mst_connector_early_unregister(connector, 594 intel_connector->port); 595 } 596 597 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 598 .fill_modes = drm_helper_probe_single_connector_modes, 599 .atomic_get_property = intel_digital_connector_atomic_get_property, 600 .atomic_set_property = intel_digital_connector_atomic_set_property, 601 .late_register = intel_dp_mst_connector_late_register, 602 .early_unregister = intel_dp_mst_connector_early_unregister, 603 .destroy = intel_connector_destroy, 604 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 605 .atomic_duplicate_state = intel_digital_connector_duplicate_state, 606 }; 607 608 static int intel_dp_mst_get_modes(struct drm_connector *connector) 609 { 610 return intel_dp_mst_get_ddc_modes(connector); 611 } 612 613 static enum drm_mode_status 614 intel_dp_mst_mode_valid(struct drm_connector *connector, 615 struct drm_display_mode *mode) 616 { 617 struct drm_i915_private *dev_priv = to_i915(connector->dev); 618 struct intel_connector *intel_connector = to_intel_connector(connector); 619 struct intel_dp *intel_dp = intel_connector->mst_port; 620 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 621 int max_rate, mode_rate, max_lanes, max_link_clock; 622 623 if (drm_connector_is_unregistered(connector)) 624 return MODE_ERROR; 625 626 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 627 return MODE_NO_DBLESCAN; 628 629 max_link_clock = intel_dp_max_link_rate(intel_dp); 630 max_lanes = intel_dp_max_lane_count(intel_dp); 631 632 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); 633 mode_rate = intel_dp_link_required(mode->clock, 18); 634 635 /* TODO - validate mode against available PBN for link */ 636 if (mode->clock < 10000) 637 return MODE_CLOCK_LOW; 638 639 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 640 return MODE_H_ILLEGAL; 641 642 if (mode_rate > max_rate || mode->clock > max_dotclk) 643 return MODE_CLOCK_HIGH; 644 645 return intel_mode_valid_max_plane_size(dev_priv, mode); 646 } 647 648 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 649 struct drm_connector_state *state) 650 { 651 struct intel_connector *intel_connector = to_intel_connector(connector); 652 struct intel_dp *intel_dp = intel_connector->mst_port; 653 struct intel_crtc *crtc = to_intel_crtc(state->crtc); 654 655 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 656 } 657 658 static int 659 intel_dp_mst_detect(struct drm_connector *connector, 660 struct drm_modeset_acquire_ctx *ctx, bool force) 661 { 662 struct intel_connector *intel_connector = to_intel_connector(connector); 663 struct intel_dp *intel_dp = intel_connector->mst_port; 664 665 if (drm_connector_is_unregistered(connector)) 666 return connector_status_disconnected; 667 668 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr, 669 intel_connector->port); 670 } 671 672 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 673 .get_modes = intel_dp_mst_get_modes, 674 .mode_valid = intel_dp_mst_mode_valid, 675 .atomic_best_encoder = intel_mst_atomic_best_encoder, 676 .atomic_check = intel_dp_mst_atomic_check, 677 .detect_ctx = intel_dp_mst_detect, 678 }; 679 680 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 681 { 682 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder)); 683 684 drm_encoder_cleanup(encoder); 685 kfree(intel_mst); 686 } 687 688 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 689 .destroy = intel_dp_mst_encoder_destroy, 690 }; 691 692 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 693 { 694 if (intel_attached_encoder(connector) && connector->base.state->crtc) { 695 enum pipe pipe; 696 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe)) 697 return false; 698 return true; 699 } 700 return false; 701 } 702 703 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) 704 { 705 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 706 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 707 struct drm_device *dev = intel_dig_port->base.base.dev; 708 struct drm_i915_private *dev_priv = to_i915(dev); 709 struct intel_connector *intel_connector; 710 struct drm_connector *connector; 711 enum pipe pipe; 712 int ret; 713 714 intel_connector = intel_connector_alloc(); 715 if (!intel_connector) 716 return NULL; 717 718 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 719 intel_connector->mst_port = intel_dp; 720 intel_connector->port = port; 721 drm_dp_mst_get_port_malloc(port); 722 723 connector = &intel_connector->base; 724 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, 725 DRM_MODE_CONNECTOR_DisplayPort); 726 if (ret) { 727 intel_connector_free(intel_connector); 728 return NULL; 729 } 730 731 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 732 733 for_each_pipe(dev_priv, pipe) { 734 struct drm_encoder *enc = 735 &intel_dp->mst_encoders[pipe]->base.base; 736 737 ret = drm_connector_attach_encoder(&intel_connector->base, enc); 738 if (ret) 739 goto err; 740 } 741 742 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 743 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 744 745 ret = drm_connector_set_path_property(connector, pathprop); 746 if (ret) 747 goto err; 748 749 intel_attach_force_audio_property(connector); 750 intel_attach_broadcast_rgb_property(connector); 751 752 /* 753 * Reuse the prop from the SST connector because we're 754 * not allowed to create new props after device registration. 755 */ 756 connector->max_bpc_property = 757 intel_dp->attached_connector->base.max_bpc_property; 758 if (connector->max_bpc_property) 759 drm_connector_attach_max_bpc_property(connector, 6, 12); 760 761 return connector; 762 763 err: 764 drm_connector_cleanup(connector); 765 return NULL; 766 } 767 768 static const struct drm_dp_mst_topology_cbs mst_cbs = { 769 .add_connector = intel_dp_add_mst_connector, 770 }; 771 772 static struct intel_dp_mst_encoder * 773 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 774 { 775 struct intel_dp_mst_encoder *intel_mst; 776 struct intel_encoder *intel_encoder; 777 struct drm_device *dev = intel_dig_port->base.base.dev; 778 779 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 780 781 if (!intel_mst) 782 return NULL; 783 784 intel_mst->pipe = pipe; 785 intel_encoder = &intel_mst->base; 786 intel_mst->primary = intel_dig_port; 787 788 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 789 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); 790 791 intel_encoder->type = INTEL_OUTPUT_DP_MST; 792 intel_encoder->power_domain = intel_dig_port->base.power_domain; 793 intel_encoder->port = intel_dig_port->base.port; 794 intel_encoder->cloneable = 0; 795 /* 796 * This is wrong, but broken userspace uses the intersection 797 * of possible_crtcs of all the encoders of a given connector 798 * to figure out which crtcs can drive said connector. What 799 * should be used instead is the union of possible_crtcs. 800 * To keep such userspace functioning we must misconfigure 801 * this to make sure the intersection is not empty :( 802 */ 803 intel_encoder->pipe_mask = ~0; 804 805 intel_encoder->compute_config = intel_dp_mst_compute_config; 806 intel_encoder->compute_config_late = intel_dp_mst_compute_config_late; 807 intel_encoder->disable = intel_mst_disable_dp; 808 intel_encoder->post_disable = intel_mst_post_disable_dp; 809 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; 810 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 811 intel_encoder->enable = intel_mst_enable_dp; 812 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 813 intel_encoder->get_config = intel_dp_mst_enc_get_config; 814 815 return intel_mst; 816 817 } 818 819 static bool 820 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 821 { 822 struct intel_dp *intel_dp = &intel_dig_port->dp; 823 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev); 824 enum pipe pipe; 825 826 for_each_pipe(dev_priv, pipe) 827 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe); 828 return true; 829 } 830 831 int 832 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port) 833 { 834 return intel_dig_port->dp.active_mst_links; 835 } 836 837 int 838 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 839 { 840 struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); 841 struct intel_dp *intel_dp = &intel_dig_port->dp; 842 enum port port = intel_dig_port->base.port; 843 int ret; 844 845 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) 846 return 0; 847 848 if (INTEL_GEN(i915) < 12 && port == PORT_A) 849 return 0; 850 851 if (INTEL_GEN(i915) < 11 && port == PORT_E) 852 return 0; 853 854 intel_dp->mst_mgr.cbs = &mst_cbs; 855 856 /* create encoders */ 857 intel_dp_create_fake_mst_encoders(intel_dig_port); 858 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, 859 &intel_dp->aux, 16, 3, conn_base_id); 860 if (ret) 861 return ret; 862 863 intel_dp->can_mst = true; 864 865 return 0; 866 } 867 868 void 869 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 870 { 871 struct intel_dp *intel_dp = &intel_dig_port->dp; 872 873 if (!intel_dp->can_mst) 874 return; 875 876 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 877 /* encoders will get killed by normal cleanup */ 878 } 879 880 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state) 881 { 882 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder; 883 } 884 885 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state) 886 { 887 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER && 888 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder; 889 } 890