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.h> 27 #include <drm/drm_atomic_helper.h> 28 #include <drm/drm_edid.h> 29 #include <drm/drm_probe_helper.h> 30 31 #include "i915_drv.h" 32 #include "intel_atomic.h" 33 #include "intel_audio.h" 34 #include "intel_connector.h" 35 #include "intel_crtc.h" 36 #include "intel_ddi.h" 37 #include "intel_de.h" 38 #include "intel_display_types.h" 39 #include "intel_dp.h" 40 #include "intel_dp_hdcp.h" 41 #include "intel_dp_mst.h" 42 #include "intel_dpio_phy.h" 43 #include "intel_hdcp.h" 44 #include "intel_hotplug.h" 45 #include "skl_scaler.h" 46 47 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, 48 struct intel_crtc_state *crtc_state, 49 struct drm_connector_state *conn_state, 50 struct link_config_limits *limits) 51 { 52 struct drm_atomic_state *state = crtc_state->uapi.state; 53 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 54 struct intel_dp *intel_dp = &intel_mst->primary->dp; 55 struct intel_connector *connector = 56 to_intel_connector(conn_state->connector); 57 struct drm_i915_private *i915 = to_i915(connector->base.dev); 58 const struct drm_display_mode *adjusted_mode = 59 &crtc_state->hw.adjusted_mode; 60 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CONSTANT_N); 61 int bpp, slots = -EINVAL; 62 63 crtc_state->lane_count = limits->max_lane_count; 64 crtc_state->port_clock = limits->max_rate; 65 66 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) { 67 crtc_state->pipe_bpp = bpp; 68 69 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, 70 crtc_state->pipe_bpp, 71 false); 72 73 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr, 74 connector->port, 75 crtc_state->pbn, 76 drm_dp_get_vc_payload_bw(&intel_dp->mst_mgr, 77 crtc_state->port_clock, 78 crtc_state->lane_count)); 79 if (slots == -EDEADLK) 80 return slots; 81 if (slots >= 0) 82 break; 83 } 84 85 if (slots < 0) { 86 drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n", 87 slots); 88 return slots; 89 } 90 91 intel_link_compute_m_n(crtc_state->pipe_bpp, 92 crtc_state->lane_count, 93 adjusted_mode->crtc_clock, 94 crtc_state->port_clock, 95 &crtc_state->dp_m_n, 96 constant_n, crtc_state->fec_enable); 97 crtc_state->dp_m_n.tu = slots; 98 99 return 0; 100 } 101 102 static int intel_dp_mst_compute_config(struct intel_encoder *encoder, 103 struct intel_crtc_state *pipe_config, 104 struct drm_connector_state *conn_state) 105 { 106 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 107 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 108 struct intel_dp *intel_dp = &intel_mst->primary->dp; 109 struct intel_connector *connector = 110 to_intel_connector(conn_state->connector); 111 struct intel_digital_connector_state *intel_conn_state = 112 to_intel_digital_connector_state(conn_state); 113 const struct drm_display_mode *adjusted_mode = 114 &pipe_config->hw.adjusted_mode; 115 struct link_config_limits limits; 116 int ret; 117 118 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 119 return -EINVAL; 120 121 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 122 pipe_config->has_pch_encoder = false; 123 124 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO) 125 pipe_config->has_audio = connector->port->has_audio; 126 else 127 pipe_config->has_audio = 128 intel_conn_state->force_audio == HDMI_AUDIO_ON; 129 130 /* 131 * for MST we always configure max link bw - the spec doesn't 132 * seem to suggest we should do otherwise. 133 */ 134 limits.min_rate = 135 limits.max_rate = intel_dp_max_link_rate(intel_dp); 136 137 limits.min_lane_count = 138 limits.max_lane_count = intel_dp_max_lane_count(intel_dp); 139 140 limits.min_bpp = intel_dp_min_bpp(pipe_config->output_format); 141 /* 142 * FIXME: If all the streams can't fit into the link with 143 * their current pipe_bpp we should reduce pipe_bpp across 144 * the board until things start to fit. Until then we 145 * limit to <= 8bpc since that's what was hardcoded for all 146 * MST streams previously. This hack should be removed once 147 * we have the proper retry logic in place. 148 */ 149 limits.max_bpp = min(pipe_config->pipe_bpp, 24); 150 151 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits); 152 153 ret = intel_dp_mst_compute_link_config(encoder, pipe_config, 154 conn_state, &limits); 155 if (ret) 156 return ret; 157 158 pipe_config->limited_color_range = 159 intel_dp_limited_color_range(pipe_config, conn_state); 160 161 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 162 pipe_config->lane_lat_optim_mask = 163 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); 164 165 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); 166 167 return 0; 168 } 169 170 /* 171 * Iterate over all connectors and return a mask of 172 * all CPU transcoders streaming over the same DP link. 173 */ 174 static unsigned int 175 intel_dp_mst_transcoder_mask(struct intel_atomic_state *state, 176 struct intel_dp *mst_port) 177 { 178 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 179 const struct intel_digital_connector_state *conn_state; 180 struct intel_connector *connector; 181 u8 transcoders = 0; 182 int i; 183 184 if (DISPLAY_VER(dev_priv) < 12) 185 return 0; 186 187 for_each_new_intel_connector_in_state(state, connector, conn_state, i) { 188 const struct intel_crtc_state *crtc_state; 189 struct intel_crtc *crtc; 190 191 if (connector->mst_port != mst_port || !conn_state->base.crtc) 192 continue; 193 194 crtc = to_intel_crtc(conn_state->base.crtc); 195 crtc_state = intel_atomic_get_new_crtc_state(state, crtc); 196 197 if (!crtc_state->hw.active) 198 continue; 199 200 transcoders |= BIT(crtc_state->cpu_transcoder); 201 } 202 203 return transcoders; 204 } 205 206 static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder, 207 struct intel_crtc_state *crtc_state, 208 struct drm_connector_state *conn_state) 209 { 210 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state); 211 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 212 struct intel_dp *intel_dp = &intel_mst->primary->dp; 213 214 /* lowest numbered transcoder will be designated master */ 215 crtc_state->mst_master_transcoder = 216 ffs(intel_dp_mst_transcoder_mask(state, intel_dp)) - 1; 217 218 return 0; 219 } 220 221 /* 222 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs 223 * that shares the same MST stream as mode changed, 224 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do 225 * a fastset when possible. 226 */ 227 static int 228 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector, 229 struct intel_atomic_state *state) 230 { 231 struct drm_i915_private *dev_priv = to_i915(state->base.dev); 232 struct drm_connector_list_iter connector_list_iter; 233 struct intel_connector *connector_iter; 234 235 if (DISPLAY_VER(dev_priv) < 12) 236 return 0; 237 238 if (!intel_connector_needs_modeset(state, &connector->base)) 239 return 0; 240 241 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter); 242 for_each_intel_connector_iter(connector_iter, &connector_list_iter) { 243 struct intel_digital_connector_state *conn_iter_state; 244 struct intel_crtc_state *crtc_state; 245 struct intel_crtc *crtc; 246 int ret; 247 248 if (connector_iter->mst_port != connector->mst_port || 249 connector_iter == connector) 250 continue; 251 252 conn_iter_state = intel_atomic_get_digital_connector_state(state, 253 connector_iter); 254 if (IS_ERR(conn_iter_state)) { 255 drm_connector_list_iter_end(&connector_list_iter); 256 return PTR_ERR(conn_iter_state); 257 } 258 259 if (!conn_iter_state->base.crtc) 260 continue; 261 262 crtc = to_intel_crtc(conn_iter_state->base.crtc); 263 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); 264 if (IS_ERR(crtc_state)) { 265 drm_connector_list_iter_end(&connector_list_iter); 266 return PTR_ERR(crtc_state); 267 } 268 269 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base); 270 if (ret) { 271 drm_connector_list_iter_end(&connector_list_iter); 272 return ret; 273 } 274 crtc_state->uapi.mode_changed = true; 275 } 276 drm_connector_list_iter_end(&connector_list_iter); 277 278 return 0; 279 } 280 281 static int 282 intel_dp_mst_atomic_check(struct drm_connector *connector, 283 struct drm_atomic_state *_state) 284 { 285 struct intel_atomic_state *state = to_intel_atomic_state(_state); 286 struct drm_connector_state *new_conn_state = 287 drm_atomic_get_new_connector_state(&state->base, connector); 288 struct drm_connector_state *old_conn_state = 289 drm_atomic_get_old_connector_state(&state->base, connector); 290 struct intel_connector *intel_connector = 291 to_intel_connector(connector); 292 struct drm_crtc *new_crtc = new_conn_state->crtc; 293 struct drm_dp_mst_topology_mgr *mgr; 294 int ret; 295 296 ret = intel_digital_connector_atomic_check(connector, &state->base); 297 if (ret) 298 return ret; 299 300 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state); 301 if (ret) 302 return ret; 303 304 if (!old_conn_state->crtc) 305 return 0; 306 307 /* We only want to free VCPI if this state disables the CRTC on this 308 * connector 309 */ 310 if (new_crtc) { 311 struct intel_crtc *crtc = to_intel_crtc(new_crtc); 312 struct intel_crtc_state *crtc_state = 313 intel_atomic_get_new_crtc_state(state, crtc); 314 315 if (!crtc_state || 316 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) || 317 crtc_state->uapi.enable) 318 return 0; 319 } 320 321 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr; 322 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr, 323 intel_connector->port); 324 325 return ret; 326 } 327 328 static void clear_act_sent(struct intel_encoder *encoder, 329 const struct intel_crtc_state *crtc_state) 330 { 331 struct drm_i915_private *i915 = to_i915(encoder->base.dev); 332 333 intel_de_write(i915, dp_tp_status_reg(encoder, crtc_state), 334 DP_TP_STATUS_ACT_SENT); 335 } 336 337 static void wait_for_act_sent(struct intel_encoder *encoder, 338 const struct intel_crtc_state *crtc_state) 339 { 340 struct drm_i915_private *i915 = to_i915(encoder->base.dev); 341 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 342 struct intel_dp *intel_dp = &intel_mst->primary->dp; 343 344 if (intel_de_wait_for_set(i915, dp_tp_status_reg(encoder, crtc_state), 345 DP_TP_STATUS_ACT_SENT, 1)) 346 drm_err(&i915->drm, "Timed out waiting for ACT sent\n"); 347 348 drm_dp_check_act_status(&intel_dp->mst_mgr); 349 } 350 351 static void intel_mst_pre_disable_dp(struct intel_atomic_state *state, 352 struct intel_encoder *encoder, 353 const struct intel_crtc_state *old_crtc_state, 354 const struct drm_connector_state *old_conn_state) 355 { 356 if (old_crtc_state->has_audio) 357 intel_audio_codec_disable(encoder, old_crtc_state, 358 old_conn_state); 359 } 360 361 static void intel_mst_disable_dp(struct intel_atomic_state *state, 362 struct intel_encoder *encoder, 363 const struct intel_crtc_state *old_crtc_state, 364 const struct drm_connector_state *old_conn_state) 365 { 366 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 367 struct intel_digital_port *dig_port = intel_mst->primary; 368 struct intel_dp *intel_dp = &dig_port->dp; 369 struct intel_connector *connector = 370 to_intel_connector(old_conn_state->connector); 371 struct drm_i915_private *i915 = to_i915(connector->base.dev); 372 int ret; 373 374 drm_dbg_kms(&i915->drm, "active links %d\n", 375 intel_dp->active_mst_links); 376 377 intel_hdcp_disable(intel_mst->connector); 378 379 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); 380 381 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr, 1); 382 if (ret) { 383 drm_dbg_kms(&i915->drm, "failed to update payload %d\n", ret); 384 } 385 } 386 387 static void intel_mst_post_disable_dp(struct intel_atomic_state *state, 388 struct intel_encoder *encoder, 389 const struct intel_crtc_state *old_crtc_state, 390 const struct drm_connector_state *old_conn_state) 391 { 392 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 393 struct intel_digital_port *dig_port = intel_mst->primary; 394 struct intel_dp *intel_dp = &dig_port->dp; 395 struct intel_connector *connector = 396 to_intel_connector(old_conn_state->connector); 397 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 398 bool last_mst_stream; 399 400 intel_dp->active_mst_links--; 401 last_mst_stream = intel_dp->active_mst_links == 0; 402 drm_WARN_ON(&dev_priv->drm, 403 DISPLAY_VER(dev_priv) >= 12 && last_mst_stream && 404 !intel_dp_mst_is_master_trans(old_crtc_state)); 405 406 intel_crtc_vblank_off(old_crtc_state); 407 408 intel_disable_transcoder(old_crtc_state); 409 410 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 411 412 clear_act_sent(encoder, old_crtc_state); 413 414 intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder), 415 TRANS_DDI_DP_VC_PAYLOAD_ALLOC, 0); 416 417 wait_for_act_sent(encoder, old_crtc_state); 418 419 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); 420 421 intel_ddi_disable_transcoder_func(old_crtc_state); 422 423 if (DISPLAY_VER(dev_priv) >= 9) 424 skl_scaler_disable(old_crtc_state); 425 else 426 ilk_pfit_disable(old_crtc_state); 427 428 /* 429 * Power down mst path before disabling the port, otherwise we end 430 * up getting interrupts from the sink upon detecting link loss. 431 */ 432 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, 433 false); 434 435 /* 436 * BSpec 4287: disable DIP after the transcoder is disabled and before 437 * the transcoder clock select is set to none. 438 */ 439 if (last_mst_stream) 440 intel_dp_set_infoframes(&dig_port->base, false, 441 old_crtc_state, NULL); 442 /* 443 * From TGL spec: "If multi-stream slave transcoder: Configure 444 * Transcoder Clock Select to direct no clock to the transcoder" 445 * 446 * From older GENs spec: "Configure Transcoder Clock Select to direct 447 * no clock to the transcoder" 448 */ 449 if (DISPLAY_VER(dev_priv) < 12 || !last_mst_stream) 450 intel_ddi_disable_pipe_clock(old_crtc_state); 451 452 453 intel_mst->connector = NULL; 454 if (last_mst_stream) 455 dig_port->base.post_disable(state, &dig_port->base, 456 old_crtc_state, NULL); 457 458 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 459 intel_dp->active_mst_links); 460 } 461 462 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state, 463 struct intel_encoder *encoder, 464 const struct intel_crtc_state *pipe_config, 465 const struct drm_connector_state *conn_state) 466 { 467 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 468 struct intel_digital_port *dig_port = intel_mst->primary; 469 struct intel_dp *intel_dp = &dig_port->dp; 470 471 if (intel_dp->active_mst_links == 0) 472 dig_port->base.pre_pll_enable(state, &dig_port->base, 473 pipe_config, NULL); 474 } 475 476 static void intel_mst_pre_enable_dp(struct intel_atomic_state *state, 477 struct intel_encoder *encoder, 478 const struct intel_crtc_state *pipe_config, 479 const struct drm_connector_state *conn_state) 480 { 481 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 482 struct intel_digital_port *dig_port = intel_mst->primary; 483 struct intel_dp *intel_dp = &dig_port->dp; 484 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 485 struct intel_connector *connector = 486 to_intel_connector(conn_state->connector); 487 int ret; 488 bool first_mst_stream; 489 490 /* MST encoders are bound to a crtc, not to a connector, 491 * force the mapping here for get_hw_state. 492 */ 493 connector->encoder = encoder; 494 intel_mst->connector = connector; 495 first_mst_stream = intel_dp->active_mst_links == 0; 496 drm_WARN_ON(&dev_priv->drm, 497 DISPLAY_VER(dev_priv) >= 12 && first_mst_stream && 498 !intel_dp_mst_is_master_trans(pipe_config)); 499 500 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 501 intel_dp->active_mst_links); 502 503 if (first_mst_stream) 504 intel_dp_set_power(intel_dp, DP_SET_POWER_D0); 505 506 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); 507 508 if (first_mst_stream) 509 dig_port->base.pre_enable(state, &dig_port->base, 510 pipe_config, NULL); 511 512 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 513 connector->port, 514 pipe_config->pbn, 515 pipe_config->dp_m_n.tu); 516 if (!ret) 517 drm_err(&dev_priv->drm, "failed to allocate vcpi\n"); 518 519 intel_dp->active_mst_links++; 520 521 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr, 1); 522 523 /* 524 * Before Gen 12 this is not done as part of 525 * dig_port->base.pre_enable() and should be done here. For 526 * Gen 12+ the step in which this should be done is different for the 527 * first MST stream, so it's done on the DDI for the first stream and 528 * here for the following ones. 529 */ 530 if (DISPLAY_VER(dev_priv) < 12 || !first_mst_stream) 531 intel_ddi_enable_pipe_clock(encoder, pipe_config); 532 533 intel_ddi_set_dp_msa(pipe_config, conn_state); 534 535 intel_dp_set_m_n(pipe_config, M1_N1); 536 } 537 538 static void intel_mst_enable_dp(struct intel_atomic_state *state, 539 struct intel_encoder *encoder, 540 const struct intel_crtc_state *pipe_config, 541 const struct drm_connector_state *conn_state) 542 { 543 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 544 struct intel_digital_port *dig_port = intel_mst->primary; 545 struct intel_dp *intel_dp = &dig_port->dp; 546 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 547 enum transcoder trans = pipe_config->cpu_transcoder; 548 549 drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder); 550 551 clear_act_sent(encoder, pipe_config); 552 553 if (intel_dp_is_uhbr(pipe_config)) { 554 const struct drm_display_mode *adjusted_mode = 555 &pipe_config->hw.adjusted_mode; 556 u64 crtc_clock_hz = KHz(adjusted_mode->crtc_clock); 557 558 intel_de_write(dev_priv, TRANS_DP2_VFREQHIGH(pipe_config->cpu_transcoder), 559 TRANS_DP2_VFREQ_PIXEL_CLOCK(crtc_clock_hz >> 24)); 560 intel_de_write(dev_priv, TRANS_DP2_VFREQLOW(pipe_config->cpu_transcoder), 561 TRANS_DP2_VFREQ_PIXEL_CLOCK(crtc_clock_hz & 0xffffff)); 562 } 563 564 intel_ddi_enable_transcoder_func(encoder, pipe_config); 565 566 intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(trans), 0, 567 TRANS_DDI_DP_VC_PAYLOAD_ALLOC); 568 569 drm_dbg_kms(&dev_priv->drm, "active links %d\n", 570 intel_dp->active_mst_links); 571 572 wait_for_act_sent(encoder, pipe_config); 573 574 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 575 576 if (DISPLAY_VER(dev_priv) >= 12 && pipe_config->fec_enable) 577 intel_de_rmw(dev_priv, CHICKEN_TRANS(trans), 0, 578 FECSTALL_DIS_DPTSTREAM_DPTTG); 579 580 intel_enable_transcoder(pipe_config); 581 582 intel_crtc_vblank_on(pipe_config); 583 584 if (pipe_config->has_audio) 585 intel_audio_codec_enable(encoder, pipe_config, conn_state); 586 587 /* Enable hdcp if it's desired */ 588 if (conn_state->content_protection == 589 DRM_MODE_CONTENT_PROTECTION_DESIRED) 590 intel_hdcp_enable(to_intel_connector(conn_state->connector), 591 pipe_config, 592 (u8)conn_state->hdcp_content_type); 593 } 594 595 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 596 enum pipe *pipe) 597 { 598 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 599 *pipe = intel_mst->pipe; 600 if (intel_mst->connector) 601 return true; 602 return false; 603 } 604 605 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 606 struct intel_crtc_state *pipe_config) 607 { 608 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 609 struct intel_digital_port *dig_port = intel_mst->primary; 610 611 dig_port->base.get_config(&dig_port->base, pipe_config); 612 } 613 614 static bool intel_dp_mst_initial_fastset_check(struct intel_encoder *encoder, 615 struct intel_crtc_state *crtc_state) 616 { 617 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 618 struct intel_digital_port *dig_port = intel_mst->primary; 619 620 return intel_dp_initial_fastset_check(&dig_port->base, crtc_state); 621 } 622 623 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 624 { 625 struct intel_connector *intel_connector = to_intel_connector(connector); 626 struct intel_dp *intel_dp = intel_connector->mst_port; 627 struct edid *edid; 628 int ret; 629 630 if (drm_connector_is_unregistered(connector)) 631 return intel_connector_update_modes(connector, NULL); 632 633 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 634 ret = intel_connector_update_modes(connector, edid); 635 kfree(edid); 636 637 return ret; 638 } 639 640 static int 641 intel_dp_mst_connector_late_register(struct drm_connector *connector) 642 { 643 struct intel_connector *intel_connector = to_intel_connector(connector); 644 int ret; 645 646 ret = drm_dp_mst_connector_late_register(connector, 647 intel_connector->port); 648 if (ret < 0) 649 return ret; 650 651 ret = intel_connector_register(connector); 652 if (ret < 0) 653 drm_dp_mst_connector_early_unregister(connector, 654 intel_connector->port); 655 656 return ret; 657 } 658 659 static void 660 intel_dp_mst_connector_early_unregister(struct drm_connector *connector) 661 { 662 struct intel_connector *intel_connector = to_intel_connector(connector); 663 664 intel_connector_unregister(connector); 665 drm_dp_mst_connector_early_unregister(connector, 666 intel_connector->port); 667 } 668 669 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 670 .fill_modes = drm_helper_probe_single_connector_modes, 671 .atomic_get_property = intel_digital_connector_atomic_get_property, 672 .atomic_set_property = intel_digital_connector_atomic_set_property, 673 .late_register = intel_dp_mst_connector_late_register, 674 .early_unregister = intel_dp_mst_connector_early_unregister, 675 .destroy = intel_connector_destroy, 676 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 677 .atomic_duplicate_state = intel_digital_connector_duplicate_state, 678 }; 679 680 static int intel_dp_mst_get_modes(struct drm_connector *connector) 681 { 682 return intel_dp_mst_get_ddc_modes(connector); 683 } 684 685 static int 686 intel_dp_mst_mode_valid_ctx(struct drm_connector *connector, 687 struct drm_display_mode *mode, 688 struct drm_modeset_acquire_ctx *ctx, 689 enum drm_mode_status *status) 690 { 691 struct drm_i915_private *dev_priv = to_i915(connector->dev); 692 struct intel_connector *intel_connector = to_intel_connector(connector); 693 struct intel_dp *intel_dp = intel_connector->mst_port; 694 struct drm_dp_mst_topology_mgr *mgr = &intel_dp->mst_mgr; 695 struct drm_dp_mst_port *port = intel_connector->port; 696 const int min_bpp = 18; 697 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 698 int max_rate, mode_rate, max_lanes, max_link_clock; 699 int ret; 700 701 if (drm_connector_is_unregistered(connector)) { 702 *status = MODE_ERROR; 703 return 0; 704 } 705 706 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) { 707 *status = MODE_NO_DBLESCAN; 708 return 0; 709 } 710 711 max_link_clock = intel_dp_max_link_rate(intel_dp); 712 max_lanes = intel_dp_max_lane_count(intel_dp); 713 714 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); 715 mode_rate = intel_dp_link_required(mode->clock, min_bpp); 716 717 ret = drm_modeset_lock(&mgr->base.lock, ctx); 718 if (ret) 719 return ret; 720 721 if (mode_rate > max_rate || mode->clock > max_dotclk || 722 drm_dp_calc_pbn_mode(mode->clock, min_bpp, false) > port->full_pbn) { 723 *status = MODE_CLOCK_HIGH; 724 return 0; 725 } 726 727 if (mode->clock < 10000) { 728 *status = MODE_CLOCK_LOW; 729 return 0; 730 } 731 732 if (mode->flags & DRM_MODE_FLAG_DBLCLK) { 733 *status = MODE_H_ILLEGAL; 734 return 0; 735 } 736 737 *status = intel_mode_valid_max_plane_size(dev_priv, mode, false); 738 return 0; 739 } 740 741 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 742 struct drm_atomic_state *state) 743 { 744 struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state, 745 connector); 746 struct intel_connector *intel_connector = to_intel_connector(connector); 747 struct intel_dp *intel_dp = intel_connector->mst_port; 748 struct intel_crtc *crtc = to_intel_crtc(connector_state->crtc); 749 750 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 751 } 752 753 static int 754 intel_dp_mst_detect(struct drm_connector *connector, 755 struct drm_modeset_acquire_ctx *ctx, bool force) 756 { 757 struct drm_i915_private *i915 = to_i915(connector->dev); 758 struct intel_connector *intel_connector = to_intel_connector(connector); 759 struct intel_dp *intel_dp = intel_connector->mst_port; 760 761 if (!INTEL_DISPLAY_ENABLED(i915)) 762 return connector_status_disconnected; 763 764 if (drm_connector_is_unregistered(connector)) 765 return connector_status_disconnected; 766 767 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr, 768 intel_connector->port); 769 } 770 771 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 772 .get_modes = intel_dp_mst_get_modes, 773 .mode_valid_ctx = intel_dp_mst_mode_valid_ctx, 774 .atomic_best_encoder = intel_mst_atomic_best_encoder, 775 .atomic_check = intel_dp_mst_atomic_check, 776 .detect_ctx = intel_dp_mst_detect, 777 }; 778 779 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 780 { 781 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder)); 782 783 drm_encoder_cleanup(encoder); 784 kfree(intel_mst); 785 } 786 787 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 788 .destroy = intel_dp_mst_encoder_destroy, 789 }; 790 791 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 792 { 793 if (intel_attached_encoder(connector) && connector->base.state->crtc) { 794 enum pipe pipe; 795 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe)) 796 return false; 797 return true; 798 } 799 return false; 800 } 801 802 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) 803 { 804 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 805 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); 806 struct drm_device *dev = dig_port->base.base.dev; 807 struct drm_i915_private *dev_priv = to_i915(dev); 808 struct intel_connector *intel_connector; 809 struct drm_connector *connector; 810 enum pipe pipe; 811 int ret; 812 813 intel_connector = intel_connector_alloc(); 814 if (!intel_connector) 815 return NULL; 816 817 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 818 intel_connector->mst_port = intel_dp; 819 intel_connector->port = port; 820 drm_dp_mst_get_port_malloc(port); 821 822 connector = &intel_connector->base; 823 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, 824 DRM_MODE_CONNECTOR_DisplayPort); 825 if (ret) { 826 intel_connector_free(intel_connector); 827 return NULL; 828 } 829 830 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 831 832 for_each_pipe(dev_priv, pipe) { 833 struct drm_encoder *enc = 834 &intel_dp->mst_encoders[pipe]->base.base; 835 836 ret = drm_connector_attach_encoder(&intel_connector->base, enc); 837 if (ret) 838 goto err; 839 } 840 841 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 842 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 843 844 ret = drm_connector_set_path_property(connector, pathprop); 845 if (ret) 846 goto err; 847 848 intel_attach_force_audio_property(connector); 849 intel_attach_broadcast_rgb_property(connector); 850 851 ret = intel_dp_hdcp_init(dig_port, intel_connector); 852 if (ret) 853 drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP MST init failed, skipping.\n", 854 connector->name, connector->base.id); 855 /* 856 * Reuse the prop from the SST connector because we're 857 * not allowed to create new props after device registration. 858 */ 859 connector->max_bpc_property = 860 intel_dp->attached_connector->base.max_bpc_property; 861 if (connector->max_bpc_property) 862 drm_connector_attach_max_bpc_property(connector, 6, 12); 863 864 return connector; 865 866 err: 867 drm_connector_cleanup(connector); 868 return NULL; 869 } 870 871 static void 872 intel_dp_mst_poll_hpd_irq(struct drm_dp_mst_topology_mgr *mgr) 873 { 874 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 875 876 intel_hpd_trigger_irq(dp_to_dig_port(intel_dp)); 877 } 878 879 static const struct drm_dp_mst_topology_cbs mst_cbs = { 880 .add_connector = intel_dp_add_mst_connector, 881 .poll_hpd_irq = intel_dp_mst_poll_hpd_irq, 882 }; 883 884 static struct intel_dp_mst_encoder * 885 intel_dp_create_fake_mst_encoder(struct intel_digital_port *dig_port, enum pipe pipe) 886 { 887 struct intel_dp_mst_encoder *intel_mst; 888 struct intel_encoder *intel_encoder; 889 struct drm_device *dev = dig_port->base.base.dev; 890 891 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 892 893 if (!intel_mst) 894 return NULL; 895 896 intel_mst->pipe = pipe; 897 intel_encoder = &intel_mst->base; 898 intel_mst->primary = dig_port; 899 900 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 901 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); 902 903 intel_encoder->type = INTEL_OUTPUT_DP_MST; 904 intel_encoder->power_domain = dig_port->base.power_domain; 905 intel_encoder->port = dig_port->base.port; 906 intel_encoder->cloneable = 0; 907 /* 908 * This is wrong, but broken userspace uses the intersection 909 * of possible_crtcs of all the encoders of a given connector 910 * to figure out which crtcs can drive said connector. What 911 * should be used instead is the union of possible_crtcs. 912 * To keep such userspace functioning we must misconfigure 913 * this to make sure the intersection is not empty :( 914 */ 915 intel_encoder->pipe_mask = ~0; 916 917 intel_encoder->compute_config = intel_dp_mst_compute_config; 918 intel_encoder->compute_config_late = intel_dp_mst_compute_config_late; 919 intel_encoder->pre_disable = intel_mst_pre_disable_dp; 920 intel_encoder->disable = intel_mst_disable_dp; 921 intel_encoder->post_disable = intel_mst_post_disable_dp; 922 intel_encoder->update_pipe = intel_ddi_update_pipe; 923 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; 924 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 925 intel_encoder->enable = intel_mst_enable_dp; 926 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 927 intel_encoder->get_config = intel_dp_mst_enc_get_config; 928 intel_encoder->initial_fastset_check = intel_dp_mst_initial_fastset_check; 929 930 return intel_mst; 931 932 } 933 934 static bool 935 intel_dp_create_fake_mst_encoders(struct intel_digital_port *dig_port) 936 { 937 struct intel_dp *intel_dp = &dig_port->dp; 938 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev); 939 enum pipe pipe; 940 941 for_each_pipe(dev_priv, pipe) 942 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(dig_port, pipe); 943 return true; 944 } 945 946 int 947 intel_dp_mst_encoder_active_links(struct intel_digital_port *dig_port) 948 { 949 return dig_port->dp.active_mst_links; 950 } 951 952 int 953 intel_dp_mst_encoder_init(struct intel_digital_port *dig_port, int conn_base_id) 954 { 955 struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); 956 struct intel_dp *intel_dp = &dig_port->dp; 957 enum port port = dig_port->base.port; 958 int ret; 959 int max_source_rate = 960 intel_dp->source_rates[intel_dp->num_source_rates - 1]; 961 962 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) 963 return 0; 964 965 if (DISPLAY_VER(i915) < 12 && port == PORT_A) 966 return 0; 967 968 if (DISPLAY_VER(i915) < 11 && port == PORT_E) 969 return 0; 970 971 intel_dp->mst_mgr.cbs = &mst_cbs; 972 973 /* create encoders */ 974 intel_dp_create_fake_mst_encoders(dig_port); 975 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, 976 &intel_dp->aux, 16, 3, 977 dig_port->max_lanes, 978 max_source_rate, 979 conn_base_id); 980 if (ret) { 981 intel_dp->mst_mgr.cbs = NULL; 982 return ret; 983 } 984 985 return 0; 986 } 987 988 bool intel_dp_mst_source_support(struct intel_dp *intel_dp) 989 { 990 return intel_dp->mst_mgr.cbs; 991 } 992 993 void 994 intel_dp_mst_encoder_cleanup(struct intel_digital_port *dig_port) 995 { 996 struct intel_dp *intel_dp = &dig_port->dp; 997 998 if (!intel_dp_mst_source_support(intel_dp)) 999 return; 1000 1001 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 1002 /* encoders will get killed by normal cleanup */ 1003 1004 intel_dp->mst_mgr.cbs = NULL; 1005 } 1006 1007 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state) 1008 { 1009 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder; 1010 } 1011 1012 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state) 1013 { 1014 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER && 1015 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder; 1016 } 1017