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_hotplug.h" 37 #include "intel_dp.h" 38 #include "intel_dp_mst.h" 39 #include "intel_dpio_phy.h" 40 41 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, 42 struct intel_crtc_state *crtc_state, 43 struct drm_connector_state *conn_state, 44 struct link_config_limits *limits) 45 { 46 struct drm_atomic_state *state = crtc_state->uapi.state; 47 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 48 struct intel_dp *intel_dp = &intel_mst->primary->dp; 49 struct intel_connector *connector = 50 to_intel_connector(conn_state->connector); 51 struct drm_i915_private *i915 = to_i915(connector->base.dev); 52 const struct drm_display_mode *adjusted_mode = 53 &crtc_state->hw.adjusted_mode; 54 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 0, 55 DP_DPCD_QUIRK_CONSTANT_N); 56 int bpp, slots = -EINVAL; 57 58 crtc_state->lane_count = limits->max_lane_count; 59 crtc_state->port_clock = limits->max_clock; 60 61 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) { 62 crtc_state->pipe_bpp = bpp; 63 64 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, 65 crtc_state->pipe_bpp, 66 false); 67 68 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr, 69 connector->port, 70 crtc_state->pbn, 0); 71 if (slots == -EDEADLK) 72 return slots; 73 if (slots >= 0) 74 break; 75 } 76 77 if (slots < 0) { 78 drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n", 79 slots); 80 return slots; 81 } 82 83 intel_link_compute_m_n(crtc_state->pipe_bpp, 84 crtc_state->lane_count, 85 adjusted_mode->crtc_clock, 86 crtc_state->port_clock, 87 &crtc_state->dp_m_n, 88 constant_n, crtc_state->fec_enable); 89 crtc_state->dp_m_n.tu = slots; 90 91 return 0; 92 } 93 94 static int intel_dp_mst_compute_config(struct intel_encoder *encoder, 95 struct intel_crtc_state *pipe_config, 96 struct drm_connector_state *conn_state) 97 { 98 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 99 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 100 struct intel_dp *intel_dp = &intel_mst->primary->dp; 101 struct intel_connector *connector = 102 to_intel_connector(conn_state->connector); 103 struct intel_digital_connector_state *intel_conn_state = 104 to_intel_digital_connector_state(conn_state); 105 const struct drm_display_mode *adjusted_mode = 106 &pipe_config->hw.adjusted_mode; 107 struct link_config_limits limits; 108 int ret; 109 110 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 111 return -EINVAL; 112 113 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 114 pipe_config->has_pch_encoder = false; 115 116 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO) 117 pipe_config->has_audio = connector->port->has_audio; 118 else 119 pipe_config->has_audio = 120 intel_conn_state->force_audio == HDMI_AUDIO_ON; 121 122 /* 123 * for MST we always configure max link bw - the spec doesn't 124 * seem to suggest we should do otherwise. 125 */ 126 limits.min_clock = 127 limits.max_clock = intel_dp_max_link_rate(intel_dp); 128 129 limits.min_lane_count = 130 limits.max_lane_count = intel_dp_max_lane_count(intel_dp); 131 132 limits.min_bpp = intel_dp_min_bpp(pipe_config); 133 /* 134 * FIXME: If all the streams can't fit into the link with 135 * their current pipe_bpp we should reduce pipe_bpp across 136 * the board until things start to fit. Until then we 137 * limit to <= 8bpc since that's what was hardcoded for all 138 * MST streams previously. This hack should be removed once 139 * we have the proper retry logic in place. 140 */ 141 limits.max_bpp = min(pipe_config->pipe_bpp, 24); 142 143 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits); 144 145 ret = intel_dp_mst_compute_link_config(encoder, pipe_config, 146 conn_state, &limits); 147 if (ret) 148 return ret; 149 150 pipe_config->limited_color_range = 151 intel_dp_limited_color_range(pipe_config, conn_state); 152 153 if (IS_GEN9_LP(dev_priv)) 154 pipe_config->lane_lat_optim_mask = 155 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); 156 157 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); 158 159 return 0; 160 } 161 162 /* 163 * Iterate over all connectors and return a mask of 164 * all CPU transcoders streaming over the same DP link. 165 */ 166 static unsigned int 167 intel_dp_mst_transcoder_mask(struct intel_atomic_state *state, 168 struct intel_dp *mst_port) 169 { 170 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 171 const struct intel_digital_connector_state *conn_state; 172 struct intel_connector *connector; 173 u8 transcoders = 0; 174 int i; 175 176 if (INTEL_GEN(dev_priv) < 12) 177 return 0; 178 179 for_each_new_intel_connector_in_state(state, connector, conn_state, i) { 180 const struct intel_crtc_state *crtc_state; 181 struct intel_crtc *crtc; 182 183 if (connector->mst_port != mst_port || !conn_state->base.crtc) 184 continue; 185 186 crtc = to_intel_crtc(conn_state->base.crtc); 187 crtc_state = intel_atomic_get_new_crtc_state(state, crtc); 188 189 if (!crtc_state->hw.active) 190 continue; 191 192 transcoders |= BIT(crtc_state->cpu_transcoder); 193 } 194 195 return transcoders; 196 } 197 198 static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder, 199 struct intel_crtc_state *crtc_state, 200 struct drm_connector_state *conn_state) 201 { 202 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state); 203 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 204 struct intel_dp *intel_dp = &intel_mst->primary->dp; 205 206 /* lowest numbered transcoder will be designated master */ 207 crtc_state->mst_master_transcoder = 208 ffs(intel_dp_mst_transcoder_mask(state, intel_dp)) - 1; 209 210 return 0; 211 } 212 213 /* 214 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs 215 * that shares the same MST stream as mode changed, 216 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do 217 * a fastset when possible. 218 */ 219 static int 220 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector, 221 struct intel_atomic_state *state) 222 { 223 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 224 struct drm_connector_list_iter connector_list_iter; 225 struct intel_connector *connector_iter; 226 227 if (INTEL_GEN(dev_priv) < 12) 228 return 0; 229 230 if (!intel_connector_needs_modeset(state, &connector->base)) 231 return 0; 232 233 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter); 234 for_each_intel_connector_iter(connector_iter, &connector_list_iter) { 235 struct intel_digital_connector_state *conn_iter_state; 236 struct intel_crtc_state *crtc_state; 237 struct intel_crtc *crtc; 238 int ret; 239 240 if (connector_iter->mst_port != connector->mst_port || 241 connector_iter == connector) 242 continue; 243 244 conn_iter_state = intel_atomic_get_digital_connector_state(state, 245 connector_iter); 246 if (IS_ERR(conn_iter_state)) { 247 drm_connector_list_iter_end(&connector_list_iter); 248 return PTR_ERR(conn_iter_state); 249 } 250 251 if (!conn_iter_state->base.crtc) 252 continue; 253 254 crtc = to_intel_crtc(conn_iter_state->base.crtc); 255 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); 256 if (IS_ERR(crtc_state)) { 257 drm_connector_list_iter_end(&connector_list_iter); 258 return PTR_ERR(crtc_state); 259 } 260 261 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base); 262 if (ret) { 263 drm_connector_list_iter_end(&connector_list_iter); 264 return ret; 265 } 266 crtc_state->uapi.mode_changed = true; 267 } 268 drm_connector_list_iter_end(&connector_list_iter); 269 270 return 0; 271 } 272 273 static int 274 intel_dp_mst_atomic_check(struct drm_connector *connector, 275 struct drm_atomic_state *_state) 276 { 277 struct intel_atomic_state *state = to_intel_atomic_state(_state); 278 struct drm_connector_state *new_conn_state = 279 drm_atomic_get_new_connector_state(&state->base, connector); 280 struct drm_connector_state *old_conn_state = 281 drm_atomic_get_old_connector_state(&state->base, connector); 282 struct intel_connector *intel_connector = 283 to_intel_connector(connector); 284 struct drm_crtc *new_crtc = new_conn_state->crtc; 285 struct drm_dp_mst_topology_mgr *mgr; 286 int ret; 287 288 ret = intel_digital_connector_atomic_check(connector, &state->base); 289 if (ret) 290 return ret; 291 292 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state); 293 if (ret) 294 return ret; 295 296 if (!old_conn_state->crtc) 297 return 0; 298 299 /* We only want to free VCPI if this state disables the CRTC on this 300 * connector 301 */ 302 if (new_crtc) { 303 struct intel_crtc *intel_crtc = to_intel_crtc(new_crtc); 304 struct intel_crtc_state *crtc_state = 305 intel_atomic_get_new_crtc_state(state, intel_crtc); 306 307 if (!crtc_state || 308 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) || 309 crtc_state->uapi.enable) 310 return 0; 311 } 312 313 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr; 314 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr, 315 intel_connector->port); 316 317 return ret; 318 } 319 320 static void intel_mst_disable_dp(struct intel_atomic_state *state, 321 struct intel_encoder *encoder, 322 const struct intel_crtc_state *old_crtc_state, 323 const struct drm_connector_state *old_conn_state) 324 { 325 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 326 struct intel_digital_port *intel_dig_port = intel_mst->primary; 327 struct intel_dp *intel_dp = &intel_dig_port->dp; 328 struct intel_connector *connector = 329 to_intel_connector(old_conn_state->connector); 330 struct drm_i915_private *i915 = to_i915(connector->base.dev); 331 int ret; 332 333 drm_dbg_kms(&i915->drm, "active links %d\n", 334 intel_dp->active_mst_links); 335 336 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); 337 338 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 339 if (ret) { 340 drm_dbg_kms(&i915->drm, "failed to update payload %d\n", ret); 341 } 342 if (old_crtc_state->has_audio) 343 intel_audio_codec_disable(encoder, 344 old_crtc_state, old_conn_state); 345 } 346 347 static void intel_mst_post_disable_dp(struct intel_atomic_state *state, 348 struct intel_encoder *encoder, 349 const struct intel_crtc_state *old_crtc_state, 350 const struct drm_connector_state *old_conn_state) 351 { 352 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 353 struct intel_digital_port *intel_dig_port = intel_mst->primary; 354 struct intel_dp *intel_dp = &intel_dig_port->dp; 355 struct intel_connector *connector = 356 to_intel_connector(old_conn_state->connector); 357 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 358 bool last_mst_stream; 359 u32 val; 360 361 intel_dp->active_mst_links--; 362 last_mst_stream = intel_dp->active_mst_links == 0; 363 drm_WARN_ON(&dev_priv->drm, 364 INTEL_GEN(dev_priv) >= 12 && last_mst_stream && 365 !intel_dp_mst_is_master_trans(old_crtc_state)); 366 367 intel_crtc_vblank_off(old_crtc_state); 368 369 intel_disable_pipe(old_crtc_state); 370 371 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 372 373 val = intel_de_read(dev_priv, 374 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder)); 375 val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC; 376 intel_de_write(dev_priv, 377 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder), 378 val); 379 380 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 381 DP_TP_STATUS_ACT_SENT, 1)) 382 drm_err(&dev_priv->drm, 383 "Timed out waiting for ACT sent when disabling\n"); 384 drm_dp_check_act_status(&intel_dp->mst_mgr); 385 386 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); 387 388 intel_ddi_disable_transcoder_func(old_crtc_state); 389 390 if (INTEL_GEN(dev_priv) >= 9) 391 skl_scaler_disable(old_crtc_state); 392 else 393 ilk_pfit_disable(old_crtc_state); 394 395 /* 396 * Power down mst path before disabling the port, otherwise we end 397 * up getting interrupts from the sink upon detecting link loss. 398 */ 399 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, 400 false); 401 402 /* 403 * BSpec 4287: disable DIP after the transcoder is disabled and before 404 * the transcoder clock select is set to none. 405 */ 406 if (last_mst_stream) 407 intel_dp_set_infoframes(&intel_dig_port->base, false, 408 old_crtc_state, NULL); 409 /* 410 * From TGL spec: "If multi-stream slave transcoder: Configure 411 * Transcoder Clock Select to direct no clock to the transcoder" 412 * 413 * From older GENs spec: "Configure Transcoder Clock Select to direct 414 * no clock to the transcoder" 415 */ 416 if (INTEL_GEN(dev_priv) < 12 || !last_mst_stream) 417 intel_ddi_disable_pipe_clock(old_crtc_state); 418 419 420 intel_mst->connector = NULL; 421 if (last_mst_stream) 422 intel_dig_port->base.post_disable(state, &intel_dig_port->base, 423 old_crtc_state, NULL); 424 425 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 426 intel_dp->active_mst_links); 427 } 428 429 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state, 430 struct intel_encoder *encoder, 431 const struct intel_crtc_state *pipe_config, 432 const struct drm_connector_state *conn_state) 433 { 434 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 435 struct intel_digital_port *intel_dig_port = intel_mst->primary; 436 struct intel_dp *intel_dp = &intel_dig_port->dp; 437 438 if (intel_dp->active_mst_links == 0) 439 intel_dig_port->base.pre_pll_enable(state, &intel_dig_port->base, 440 pipe_config, NULL); 441 } 442 443 static void intel_mst_pre_enable_dp(struct intel_atomic_state *state, 444 struct intel_encoder *encoder, 445 const struct intel_crtc_state *pipe_config, 446 const struct drm_connector_state *conn_state) 447 { 448 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 449 struct intel_digital_port *intel_dig_port = intel_mst->primary; 450 struct intel_dp *intel_dp = &intel_dig_port->dp; 451 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 452 struct intel_connector *connector = 453 to_intel_connector(conn_state->connector); 454 int ret; 455 u32 temp; 456 bool first_mst_stream; 457 458 /* MST encoders are bound to a crtc, not to a connector, 459 * force the mapping here for get_hw_state. 460 */ 461 connector->encoder = encoder; 462 intel_mst->connector = connector; 463 first_mst_stream = intel_dp->active_mst_links == 0; 464 drm_WARN_ON(&dev_priv->drm, 465 INTEL_GEN(dev_priv) >= 12 && first_mst_stream && 466 !intel_dp_mst_is_master_trans(pipe_config)); 467 468 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 469 intel_dp->active_mst_links); 470 471 if (first_mst_stream) 472 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 473 474 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); 475 476 if (first_mst_stream) 477 intel_dig_port->base.pre_enable(state, &intel_dig_port->base, 478 pipe_config, NULL); 479 480 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 481 connector->port, 482 pipe_config->pbn, 483 pipe_config->dp_m_n.tu); 484 if (!ret) 485 drm_err(&dev_priv->drm, "failed to allocate vcpi\n"); 486 487 intel_dp->active_mst_links++; 488 temp = intel_de_read(dev_priv, intel_dp->regs.dp_tp_status); 489 intel_de_write(dev_priv, intel_dp->regs.dp_tp_status, temp); 490 491 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 492 493 /* 494 * Before Gen 12 this is not done as part of 495 * intel_dig_port->base.pre_enable() and should be done here. For 496 * Gen 12+ the step in which this should be done is different for the 497 * first MST stream, so it's done on the DDI for the first stream and 498 * here for the following ones. 499 */ 500 if (INTEL_GEN(dev_priv) < 12 || !first_mst_stream) 501 intel_ddi_enable_pipe_clock(encoder, pipe_config); 502 503 intel_ddi_set_dp_msa(pipe_config, conn_state); 504 505 intel_dp_set_m_n(pipe_config, M1_N1); 506 } 507 508 static void intel_mst_enable_dp(struct intel_atomic_state *state, 509 struct intel_encoder *encoder, 510 const struct intel_crtc_state *pipe_config, 511 const struct drm_connector_state *conn_state) 512 { 513 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 514 struct intel_digital_port *intel_dig_port = intel_mst->primary; 515 struct intel_dp *intel_dp = &intel_dig_port->dp; 516 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 517 518 drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder); 519 520 intel_ddi_enable_transcoder_func(encoder, pipe_config); 521 522 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 523 intel_dp->active_mst_links); 524 525 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 526 DP_TP_STATUS_ACT_SENT, 1)) 527 drm_err(&dev_priv->drm, "Timed out waiting for ACT sent\n"); 528 529 drm_dp_check_act_status(&intel_dp->mst_mgr); 530 531 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 532 533 intel_enable_pipe(pipe_config); 534 535 intel_crtc_vblank_on(pipe_config); 536 537 if (pipe_config->has_audio) 538 intel_audio_codec_enable(encoder, pipe_config, conn_state); 539 } 540 541 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 542 enum pipe *pipe) 543 { 544 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 545 *pipe = intel_mst->pipe; 546 if (intel_mst->connector) 547 return true; 548 return false; 549 } 550 551 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 552 struct intel_crtc_state *pipe_config) 553 { 554 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 555 struct intel_digital_port *intel_dig_port = intel_mst->primary; 556 557 intel_ddi_get_config(&intel_dig_port->base, pipe_config); 558 } 559 560 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 561 { 562 struct intel_connector *intel_connector = to_intel_connector(connector); 563 struct intel_dp *intel_dp = intel_connector->mst_port; 564 struct edid *edid; 565 int ret; 566 567 if (drm_connector_is_unregistered(connector)) 568 return intel_connector_update_modes(connector, NULL); 569 570 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 571 ret = intel_connector_update_modes(connector, edid); 572 kfree(edid); 573 574 return ret; 575 } 576 577 static int 578 intel_dp_mst_connector_late_register(struct drm_connector *connector) 579 { 580 struct intel_connector *intel_connector = to_intel_connector(connector); 581 int ret; 582 583 ret = drm_dp_mst_connector_late_register(connector, 584 intel_connector->port); 585 if (ret < 0) 586 return ret; 587 588 ret = intel_connector_register(connector); 589 if (ret < 0) 590 drm_dp_mst_connector_early_unregister(connector, 591 intel_connector->port); 592 593 return ret; 594 } 595 596 static void 597 intel_dp_mst_connector_early_unregister(struct drm_connector *connector) 598 { 599 struct intel_connector *intel_connector = to_intel_connector(connector); 600 601 intel_connector_unregister(connector); 602 drm_dp_mst_connector_early_unregister(connector, 603 intel_connector->port); 604 } 605 606 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 607 .fill_modes = drm_helper_probe_single_connector_modes, 608 .atomic_get_property = intel_digital_connector_atomic_get_property, 609 .atomic_set_property = intel_digital_connector_atomic_set_property, 610 .late_register = intel_dp_mst_connector_late_register, 611 .early_unregister = intel_dp_mst_connector_early_unregister, 612 .destroy = intel_connector_destroy, 613 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 614 .atomic_duplicate_state = intel_digital_connector_duplicate_state, 615 }; 616 617 static int intel_dp_mst_get_modes(struct drm_connector *connector) 618 { 619 return intel_dp_mst_get_ddc_modes(connector); 620 } 621 622 static enum drm_mode_status 623 intel_dp_mst_mode_valid(struct drm_connector *connector, 624 struct drm_display_mode *mode) 625 { 626 struct drm_i915_private *dev_priv = to_i915(connector->dev); 627 struct intel_connector *intel_connector = to_intel_connector(connector); 628 struct intel_dp *intel_dp = intel_connector->mst_port; 629 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 630 int max_rate, mode_rate, max_lanes, max_link_clock; 631 632 if (drm_connector_is_unregistered(connector)) 633 return MODE_ERROR; 634 635 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 636 return MODE_NO_DBLESCAN; 637 638 max_link_clock = intel_dp_max_link_rate(intel_dp); 639 max_lanes = intel_dp_max_lane_count(intel_dp); 640 641 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); 642 mode_rate = intel_dp_link_required(mode->clock, 18); 643 644 /* TODO - validate mode against available PBN for link */ 645 if (mode->clock < 10000) 646 return MODE_CLOCK_LOW; 647 648 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 649 return MODE_H_ILLEGAL; 650 651 if (mode_rate > max_rate || mode->clock > max_dotclk) 652 return MODE_CLOCK_HIGH; 653 654 return intel_mode_valid_max_plane_size(dev_priv, mode); 655 } 656 657 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 658 struct drm_connector_state *state) 659 { 660 struct intel_connector *intel_connector = to_intel_connector(connector); 661 struct intel_dp *intel_dp = intel_connector->mst_port; 662 struct intel_crtc *crtc = to_intel_crtc(state->crtc); 663 664 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 665 } 666 667 static int 668 intel_dp_mst_detect(struct drm_connector *connector, 669 struct drm_modeset_acquire_ctx *ctx, bool force) 670 { 671 struct intel_connector *intel_connector = to_intel_connector(connector); 672 struct intel_dp *intel_dp = intel_connector->mst_port; 673 674 if (drm_connector_is_unregistered(connector)) 675 return connector_status_disconnected; 676 677 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr, 678 intel_connector->port); 679 } 680 681 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 682 .get_modes = intel_dp_mst_get_modes, 683 .mode_valid = intel_dp_mst_mode_valid, 684 .atomic_best_encoder = intel_mst_atomic_best_encoder, 685 .atomic_check = intel_dp_mst_atomic_check, 686 .detect_ctx = intel_dp_mst_detect, 687 }; 688 689 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 690 { 691 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder)); 692 693 drm_encoder_cleanup(encoder); 694 kfree(intel_mst); 695 } 696 697 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 698 .destroy = intel_dp_mst_encoder_destroy, 699 }; 700 701 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 702 { 703 if (intel_attached_encoder(connector) && connector->base.state->crtc) { 704 enum pipe pipe; 705 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe)) 706 return false; 707 return true; 708 } 709 return false; 710 } 711 712 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) 713 { 714 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 715 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 716 struct drm_device *dev = intel_dig_port->base.base.dev; 717 struct drm_i915_private *dev_priv = to_i915(dev); 718 struct intel_connector *intel_connector; 719 struct drm_connector *connector; 720 enum pipe pipe; 721 int ret; 722 723 intel_connector = intel_connector_alloc(); 724 if (!intel_connector) 725 return NULL; 726 727 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 728 intel_connector->mst_port = intel_dp; 729 intel_connector->port = port; 730 drm_dp_mst_get_port_malloc(port); 731 732 connector = &intel_connector->base; 733 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, 734 DRM_MODE_CONNECTOR_DisplayPort); 735 if (ret) { 736 intel_connector_free(intel_connector); 737 return NULL; 738 } 739 740 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 741 742 for_each_pipe(dev_priv, pipe) { 743 struct drm_encoder *enc = 744 &intel_dp->mst_encoders[pipe]->base.base; 745 746 ret = drm_connector_attach_encoder(&intel_connector->base, enc); 747 if (ret) 748 goto err; 749 } 750 751 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 752 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 753 754 ret = drm_connector_set_path_property(connector, pathprop); 755 if (ret) 756 goto err; 757 758 intel_attach_force_audio_property(connector); 759 intel_attach_broadcast_rgb_property(connector); 760 761 /* 762 * Reuse the prop from the SST connector because we're 763 * not allowed to create new props after device registration. 764 */ 765 connector->max_bpc_property = 766 intel_dp->attached_connector->base.max_bpc_property; 767 if (connector->max_bpc_property) 768 drm_connector_attach_max_bpc_property(connector, 6, 12); 769 770 return connector; 771 772 err: 773 drm_connector_cleanup(connector); 774 return NULL; 775 } 776 777 static void 778 intel_dp_mst_poll_hpd_irq(struct drm_dp_mst_topology_mgr *mgr) 779 { 780 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 781 782 intel_hpd_trigger_irq(dp_to_dig_port(intel_dp)); 783 } 784 785 static const struct drm_dp_mst_topology_cbs mst_cbs = { 786 .add_connector = intel_dp_add_mst_connector, 787 .poll_hpd_irq = intel_dp_mst_poll_hpd_irq, 788 }; 789 790 static struct intel_dp_mst_encoder * 791 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 792 { 793 struct intel_dp_mst_encoder *intel_mst; 794 struct intel_encoder *intel_encoder; 795 struct drm_device *dev = intel_dig_port->base.base.dev; 796 797 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 798 799 if (!intel_mst) 800 return NULL; 801 802 intel_mst->pipe = pipe; 803 intel_encoder = &intel_mst->base; 804 intel_mst->primary = intel_dig_port; 805 806 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 807 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); 808 809 intel_encoder->type = INTEL_OUTPUT_DP_MST; 810 intel_encoder->power_domain = intel_dig_port->base.power_domain; 811 intel_encoder->port = intel_dig_port->base.port; 812 intel_encoder->cloneable = 0; 813 /* 814 * This is wrong, but broken userspace uses the intersection 815 * of possible_crtcs of all the encoders of a given connector 816 * to figure out which crtcs can drive said connector. What 817 * should be used instead is the union of possible_crtcs. 818 * To keep such userspace functioning we must misconfigure 819 * this to make sure the intersection is not empty :( 820 */ 821 intel_encoder->pipe_mask = ~0; 822 823 intel_encoder->compute_config = intel_dp_mst_compute_config; 824 intel_encoder->compute_config_late = intel_dp_mst_compute_config_late; 825 intel_encoder->disable = intel_mst_disable_dp; 826 intel_encoder->post_disable = intel_mst_post_disable_dp; 827 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; 828 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 829 intel_encoder->enable = intel_mst_enable_dp; 830 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 831 intel_encoder->get_config = intel_dp_mst_enc_get_config; 832 833 return intel_mst; 834 835 } 836 837 static bool 838 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 839 { 840 struct intel_dp *intel_dp = &intel_dig_port->dp; 841 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev); 842 enum pipe pipe; 843 844 for_each_pipe(dev_priv, pipe) 845 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe); 846 return true; 847 } 848 849 int 850 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port) 851 { 852 return intel_dig_port->dp.active_mst_links; 853 } 854 855 int 856 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 857 { 858 struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); 859 struct intel_dp *intel_dp = &intel_dig_port->dp; 860 enum port port = intel_dig_port->base.port; 861 int ret; 862 863 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) 864 return 0; 865 866 if (INTEL_GEN(i915) < 12 && port == PORT_A) 867 return 0; 868 869 if (INTEL_GEN(i915) < 11 && port == PORT_E) 870 return 0; 871 872 intel_dp->mst_mgr.cbs = &mst_cbs; 873 874 /* create encoders */ 875 intel_dp_create_fake_mst_encoders(intel_dig_port); 876 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, 877 &intel_dp->aux, 16, 3, conn_base_id); 878 if (ret) 879 return ret; 880 881 intel_dp->can_mst = true; 882 883 return 0; 884 } 885 886 void 887 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 888 { 889 struct intel_dp *intel_dp = &intel_dig_port->dp; 890 891 if (!intel_dp->can_mst) 892 return; 893 894 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 895 /* encoders will get killed by normal cleanup */ 896 } 897 898 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state) 899 { 900 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder; 901 } 902 903 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state) 904 { 905 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER && 906 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder; 907 } 908