1 /* 2 * Copyright © 2008 Intel Corporation 3 * 2014 Red Hat Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22 * IN THE SOFTWARE. 23 * 24 */ 25 26 #include <drm/drm_atomic_helper.h> 27 #include <drm/drm_edid.h> 28 #include <drm/drm_probe_helper.h> 29 30 #include "i915_drv.h" 31 #include "intel_atomic.h" 32 #include "intel_audio.h" 33 #include "intel_connector.h" 34 #include "intel_ddi.h" 35 #include "intel_display_types.h" 36 #include "intel_dp.h" 37 #include "intel_dp_mst.h" 38 #include "intel_dpio_phy.h" 39 40 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, 41 struct intel_crtc_state *crtc_state, 42 struct drm_connector_state *conn_state, 43 struct link_config_limits *limits) 44 { 45 struct drm_atomic_state *state = crtc_state->base.state; 46 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 47 struct intel_dp *intel_dp = &intel_mst->primary->dp; 48 struct intel_connector *connector = 49 to_intel_connector(conn_state->connector); 50 const struct drm_display_mode *adjusted_mode = 51 &crtc_state->base.adjusted_mode; 52 void *port = connector->port; 53 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 54 DP_DPCD_QUIRK_CONSTANT_N); 55 int bpp, slots = -EINVAL; 56 57 crtc_state->lane_count = limits->max_lane_count; 58 crtc_state->port_clock = limits->max_clock; 59 60 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) { 61 crtc_state->pipe_bpp = bpp; 62 63 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, 64 crtc_state->pipe_bpp); 65 66 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr, 67 port, crtc_state->pbn); 68 if (slots == -EDEADLK) 69 return slots; 70 if (slots >= 0) 71 break; 72 } 73 74 if (slots < 0) { 75 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots); 76 return slots; 77 } 78 79 intel_link_compute_m_n(crtc_state->pipe_bpp, 80 crtc_state->lane_count, 81 adjusted_mode->crtc_clock, 82 crtc_state->port_clock, 83 &crtc_state->dp_m_n, 84 constant_n, crtc_state->fec_enable); 85 crtc_state->dp_m_n.tu = slots; 86 87 return 0; 88 } 89 90 static int intel_dp_mst_compute_config(struct intel_encoder *encoder, 91 struct intel_crtc_state *pipe_config, 92 struct drm_connector_state *conn_state) 93 { 94 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 95 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 96 struct intel_dp *intel_dp = &intel_mst->primary->dp; 97 struct intel_connector *connector = 98 to_intel_connector(conn_state->connector); 99 struct intel_digital_connector_state *intel_conn_state = 100 to_intel_digital_connector_state(conn_state); 101 const struct drm_display_mode *adjusted_mode = 102 &pipe_config->base.adjusted_mode; 103 void *port = connector->port; 104 struct link_config_limits limits; 105 int ret; 106 107 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 108 return -EINVAL; 109 110 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 111 pipe_config->has_pch_encoder = false; 112 113 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO) 114 pipe_config->has_audio = 115 drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port); 116 else 117 pipe_config->has_audio = 118 intel_conn_state->force_audio == HDMI_AUDIO_ON; 119 120 /* 121 * for MST we always configure max link bw - the spec doesn't 122 * seem to suggest we should do otherwise. 123 */ 124 limits.min_clock = 125 limits.max_clock = intel_dp_max_link_rate(intel_dp); 126 127 limits.min_lane_count = 128 limits.max_lane_count = intel_dp_max_lane_count(intel_dp); 129 130 limits.min_bpp = intel_dp_min_bpp(pipe_config); 131 /* 132 * FIXME: If all the streams can't fit into the link with 133 * their current pipe_bpp we should reduce pipe_bpp across 134 * the board until things start to fit. Until then we 135 * limit to <= 8bpc since that's what was hardcoded for all 136 * MST streams previously. This hack should be removed once 137 * we have the proper retry logic in place. 138 */ 139 limits.max_bpp = min(pipe_config->pipe_bpp, 24); 140 141 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits); 142 143 ret = intel_dp_mst_compute_link_config(encoder, pipe_config, 144 conn_state, &limits); 145 if (ret) 146 return ret; 147 148 pipe_config->limited_color_range = 149 intel_dp_limited_color_range(pipe_config, conn_state); 150 151 if (IS_GEN9_LP(dev_priv)) 152 pipe_config->lane_lat_optim_mask = 153 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); 154 155 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); 156 157 return 0; 158 } 159 160 static int 161 intel_dp_mst_atomic_check(struct drm_connector *connector, 162 struct drm_atomic_state *state) 163 { 164 struct drm_connector_state *new_conn_state = 165 drm_atomic_get_new_connector_state(state, connector); 166 struct drm_connector_state *old_conn_state = 167 drm_atomic_get_old_connector_state(state, connector); 168 struct intel_connector *intel_connector = 169 to_intel_connector(connector); 170 struct drm_crtc *new_crtc = new_conn_state->crtc; 171 struct drm_crtc_state *crtc_state; 172 struct drm_dp_mst_topology_mgr *mgr; 173 int ret; 174 175 ret = intel_digital_connector_atomic_check(connector, state); 176 if (ret) 177 return ret; 178 179 if (!old_conn_state->crtc) 180 return 0; 181 182 /* We only want to free VCPI if this state disables the CRTC on this 183 * connector 184 */ 185 if (new_crtc) { 186 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc); 187 188 if (!crtc_state || 189 !drm_atomic_crtc_needs_modeset(crtc_state) || 190 crtc_state->enable) 191 return 0; 192 } 193 194 mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr; 195 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, 196 intel_connector->port); 197 198 return ret; 199 } 200 201 static void intel_mst_disable_dp(struct intel_encoder *encoder, 202 const struct intel_crtc_state *old_crtc_state, 203 const struct drm_connector_state *old_conn_state) 204 { 205 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 206 struct intel_digital_port *intel_dig_port = intel_mst->primary; 207 struct intel_dp *intel_dp = &intel_dig_port->dp; 208 struct intel_connector *connector = 209 to_intel_connector(old_conn_state->connector); 210 int ret; 211 212 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 213 214 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); 215 216 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 217 if (ret) { 218 DRM_DEBUG_KMS("failed to update payload %d\n", ret); 219 } 220 if (old_crtc_state->has_audio) 221 intel_audio_codec_disable(encoder, 222 old_crtc_state, old_conn_state); 223 } 224 225 static void intel_mst_post_disable_dp(struct intel_encoder *encoder, 226 const struct intel_crtc_state *old_crtc_state, 227 const struct drm_connector_state *old_conn_state) 228 { 229 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 230 struct intel_digital_port *intel_dig_port = intel_mst->primary; 231 struct intel_dp *intel_dp = &intel_dig_port->dp; 232 struct intel_connector *connector = 233 to_intel_connector(old_conn_state->connector); 234 235 intel_ddi_disable_pipe_clock(old_crtc_state); 236 237 /* this can fail */ 238 drm_dp_check_act_status(&intel_dp->mst_mgr); 239 /* and this can also fail */ 240 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 241 242 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); 243 244 /* 245 * Power down mst path before disabling the port, otherwise we end 246 * up getting interrupts from the sink upon detecting link loss. 247 */ 248 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, 249 false); 250 251 intel_dp->active_mst_links--; 252 253 intel_mst->connector = NULL; 254 if (intel_dp->active_mst_links == 0) { 255 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); 256 intel_dig_port->base.post_disable(&intel_dig_port->base, 257 old_crtc_state, NULL); 258 } 259 260 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 261 } 262 263 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder, 264 const struct intel_crtc_state *pipe_config, 265 const struct drm_connector_state *conn_state) 266 { 267 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 268 struct intel_digital_port *intel_dig_port = intel_mst->primary; 269 struct intel_dp *intel_dp = &intel_dig_port->dp; 270 271 if (intel_dp->active_mst_links == 0) 272 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base, 273 pipe_config, NULL); 274 } 275 276 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder, 277 const struct intel_crtc_state *old_crtc_state, 278 const struct drm_connector_state *old_conn_state) 279 { 280 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 281 struct intel_digital_port *intel_dig_port = intel_mst->primary; 282 struct intel_dp *intel_dp = &intel_dig_port->dp; 283 284 if (intel_dp->active_mst_links == 0) 285 intel_dig_port->base.post_pll_disable(&intel_dig_port->base, 286 old_crtc_state, 287 old_conn_state); 288 } 289 290 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, 291 const struct intel_crtc_state *pipe_config, 292 const struct drm_connector_state *conn_state) 293 { 294 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 295 struct intel_digital_port *intel_dig_port = intel_mst->primary; 296 struct intel_dp *intel_dp = &intel_dig_port->dp; 297 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 298 struct intel_connector *connector = 299 to_intel_connector(conn_state->connector); 300 int ret; 301 u32 temp; 302 303 /* MST encoders are bound to a crtc, not to a connector, 304 * force the mapping here for get_hw_state. 305 */ 306 connector->encoder = encoder; 307 intel_mst->connector = connector; 308 309 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 310 311 if (intel_dp->active_mst_links == 0) 312 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 313 314 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); 315 316 if (intel_dp->active_mst_links == 0) 317 intel_dig_port->base.pre_enable(&intel_dig_port->base, 318 pipe_config, NULL); 319 320 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 321 connector->port, 322 pipe_config->pbn, 323 pipe_config->dp_m_n.tu); 324 if (!ret) 325 DRM_ERROR("failed to allocate vcpi\n"); 326 327 intel_dp->active_mst_links++; 328 temp = I915_READ(intel_dp->regs.dp_tp_status); 329 I915_WRITE(intel_dp->regs.dp_tp_status, temp); 330 331 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 332 333 intel_ddi_enable_pipe_clock(pipe_config); 334 } 335 336 static void intel_mst_enable_dp(struct intel_encoder *encoder, 337 const struct intel_crtc_state *pipe_config, 338 const struct drm_connector_state *conn_state) 339 { 340 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 341 struct intel_digital_port *intel_dig_port = intel_mst->primary; 342 struct intel_dp *intel_dp = &intel_dig_port->dp; 343 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 344 345 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); 346 347 if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status, 348 DP_TP_STATUS_ACT_SENT, 1)) 349 DRM_ERROR("Timed out waiting for ACT sent\n"); 350 351 drm_dp_check_act_status(&intel_dp->mst_mgr); 352 353 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 354 if (pipe_config->has_audio) 355 intel_audio_codec_enable(encoder, pipe_config, conn_state); 356 } 357 358 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 359 enum pipe *pipe) 360 { 361 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 362 *pipe = intel_mst->pipe; 363 if (intel_mst->connector) 364 return true; 365 return false; 366 } 367 368 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 369 struct intel_crtc_state *pipe_config) 370 { 371 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 372 struct intel_digital_port *intel_dig_port = intel_mst->primary; 373 374 intel_ddi_get_config(&intel_dig_port->base, pipe_config); 375 } 376 377 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 378 { 379 struct intel_connector *intel_connector = to_intel_connector(connector); 380 struct intel_dp *intel_dp = intel_connector->mst_port; 381 struct edid *edid; 382 int ret; 383 384 if (drm_connector_is_unregistered(connector)) 385 return intel_connector_update_modes(connector, NULL); 386 387 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 388 ret = intel_connector_update_modes(connector, edid); 389 kfree(edid); 390 391 return ret; 392 } 393 394 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 395 .fill_modes = drm_helper_probe_single_connector_modes, 396 .atomic_get_property = intel_digital_connector_atomic_get_property, 397 .atomic_set_property = intel_digital_connector_atomic_set_property, 398 .late_register = intel_connector_register, 399 .early_unregister = intel_connector_unregister, 400 .destroy = intel_connector_destroy, 401 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 402 .atomic_duplicate_state = intel_digital_connector_duplicate_state, 403 }; 404 405 static int intel_dp_mst_get_modes(struct drm_connector *connector) 406 { 407 return intel_dp_mst_get_ddc_modes(connector); 408 } 409 410 static enum drm_mode_status 411 intel_dp_mst_mode_valid(struct drm_connector *connector, 412 struct drm_display_mode *mode) 413 { 414 struct drm_i915_private *dev_priv = to_i915(connector->dev); 415 struct intel_connector *intel_connector = to_intel_connector(connector); 416 struct intel_dp *intel_dp = intel_connector->mst_port; 417 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 418 int max_rate, mode_rate, max_lanes, max_link_clock; 419 420 if (drm_connector_is_unregistered(connector)) 421 return MODE_ERROR; 422 423 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 424 return MODE_NO_DBLESCAN; 425 426 max_link_clock = intel_dp_max_link_rate(intel_dp); 427 max_lanes = intel_dp_max_lane_count(intel_dp); 428 429 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); 430 mode_rate = intel_dp_link_required(mode->clock, 18); 431 432 /* TODO - validate mode against available PBN for link */ 433 if (mode->clock < 10000) 434 return MODE_CLOCK_LOW; 435 436 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 437 return MODE_H_ILLEGAL; 438 439 if (mode_rate > max_rate || mode->clock > max_dotclk) 440 return MODE_CLOCK_HIGH; 441 442 return intel_mode_valid_max_plane_size(dev_priv, mode); 443 } 444 445 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 446 struct drm_connector_state *state) 447 { 448 struct intel_connector *intel_connector = to_intel_connector(connector); 449 struct intel_dp *intel_dp = intel_connector->mst_port; 450 struct intel_crtc *crtc = to_intel_crtc(state->crtc); 451 452 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 453 } 454 455 static int 456 intel_dp_mst_detect(struct drm_connector *connector, 457 struct drm_modeset_acquire_ctx *ctx, bool force) 458 { 459 struct intel_connector *intel_connector = to_intel_connector(connector); 460 struct intel_dp *intel_dp = intel_connector->mst_port; 461 462 if (drm_connector_is_unregistered(connector)) 463 return connector_status_disconnected; 464 465 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr, 466 intel_connector->port); 467 } 468 469 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 470 .get_modes = intel_dp_mst_get_modes, 471 .mode_valid = intel_dp_mst_mode_valid, 472 .atomic_best_encoder = intel_mst_atomic_best_encoder, 473 .atomic_check = intel_dp_mst_atomic_check, 474 .detect_ctx = intel_dp_mst_detect, 475 }; 476 477 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 478 { 479 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 480 481 drm_encoder_cleanup(encoder); 482 kfree(intel_mst); 483 } 484 485 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 486 .destroy = intel_dp_mst_encoder_destroy, 487 }; 488 489 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 490 { 491 if (connector->encoder && connector->base.state->crtc) { 492 enum pipe pipe; 493 if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) 494 return false; 495 return true; 496 } 497 return false; 498 } 499 500 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) 501 { 502 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 503 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 504 struct drm_device *dev = intel_dig_port->base.base.dev; 505 struct drm_i915_private *dev_priv = to_i915(dev); 506 struct intel_connector *intel_connector; 507 struct drm_connector *connector; 508 enum pipe pipe; 509 int ret; 510 511 intel_connector = intel_connector_alloc(); 512 if (!intel_connector) 513 return NULL; 514 515 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 516 intel_connector->mst_port = intel_dp; 517 intel_connector->port = port; 518 drm_dp_mst_get_port_malloc(port); 519 520 connector = &intel_connector->base; 521 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, 522 DRM_MODE_CONNECTOR_DisplayPort); 523 if (ret) { 524 intel_connector_free(intel_connector); 525 return NULL; 526 } 527 528 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 529 530 for_each_pipe(dev_priv, pipe) { 531 struct drm_encoder *enc = 532 &intel_dp->mst_encoders[pipe]->base.base; 533 534 ret = drm_connector_attach_encoder(&intel_connector->base, enc); 535 if (ret) 536 goto err; 537 } 538 539 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 540 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 541 542 ret = drm_connector_set_path_property(connector, pathprop); 543 if (ret) 544 goto err; 545 546 intel_attach_force_audio_property(connector); 547 intel_attach_broadcast_rgb_property(connector); 548 549 /* 550 * Reuse the prop from the SST connector because we're 551 * not allowed to create new props after device registration. 552 */ 553 connector->max_bpc_property = 554 intel_dp->attached_connector->base.max_bpc_property; 555 if (connector->max_bpc_property) 556 drm_connector_attach_max_bpc_property(connector, 6, 12); 557 558 return connector; 559 560 err: 561 drm_connector_cleanup(connector); 562 return NULL; 563 } 564 565 static void intel_dp_register_mst_connector(struct drm_connector *connector) 566 { 567 struct drm_i915_private *dev_priv = to_i915(connector->dev); 568 569 if (dev_priv->fbdev) 570 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, 571 connector); 572 573 drm_connector_register(connector); 574 } 575 576 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 577 struct drm_connector *connector) 578 { 579 struct drm_i915_private *dev_priv = to_i915(connector->dev); 580 581 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name); 582 drm_connector_unregister(connector); 583 584 if (dev_priv->fbdev) 585 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, 586 connector); 587 588 drm_connector_put(connector); 589 } 590 591 static const struct drm_dp_mst_topology_cbs mst_cbs = { 592 .add_connector = intel_dp_add_mst_connector, 593 .register_connector = intel_dp_register_mst_connector, 594 .destroy_connector = intel_dp_destroy_mst_connector, 595 }; 596 597 static struct intel_dp_mst_encoder * 598 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 599 { 600 struct intel_dp_mst_encoder *intel_mst; 601 struct intel_encoder *intel_encoder; 602 struct drm_device *dev = intel_dig_port->base.base.dev; 603 604 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 605 606 if (!intel_mst) 607 return NULL; 608 609 intel_mst->pipe = pipe; 610 intel_encoder = &intel_mst->base; 611 intel_mst->primary = intel_dig_port; 612 613 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 614 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); 615 616 intel_encoder->type = INTEL_OUTPUT_DP_MST; 617 intel_encoder->power_domain = intel_dig_port->base.power_domain; 618 intel_encoder->port = intel_dig_port->base.port; 619 intel_encoder->cloneable = 0; 620 /* 621 * This is wrong, but broken userspace uses the intersection 622 * of possible_crtcs of all the encoders of a given connector 623 * to figure out which crtcs can drive said connector. What 624 * should be used instead is the union of possible_crtcs. 625 * To keep such userspace functioning we must misconfigure 626 * this to make sure the intersection is not empty :( 627 */ 628 intel_encoder->pipe_mask = ~0; 629 630 intel_encoder->compute_config = intel_dp_mst_compute_config; 631 intel_encoder->disable = intel_mst_disable_dp; 632 intel_encoder->post_disable = intel_mst_post_disable_dp; 633 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; 634 intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp; 635 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 636 intel_encoder->enable = intel_mst_enable_dp; 637 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 638 intel_encoder->get_config = intel_dp_mst_enc_get_config; 639 640 return intel_mst; 641 642 } 643 644 static bool 645 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 646 { 647 struct intel_dp *intel_dp = &intel_dig_port->dp; 648 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev); 649 enum pipe pipe; 650 651 for_each_pipe(dev_priv, pipe) 652 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe); 653 return true; 654 } 655 656 int 657 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port) 658 { 659 return intel_dig_port->dp.active_mst_links; 660 } 661 662 int 663 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 664 { 665 struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev); 666 struct intel_dp *intel_dp = &intel_dig_port->dp; 667 enum port port = intel_dig_port->base.port; 668 int ret; 669 670 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) 671 return 0; 672 673 if (INTEL_GEN(i915) < 12 && port == PORT_A) 674 return 0; 675 676 if (INTEL_GEN(i915) < 11 && port == PORT_E) 677 return 0; 678 679 intel_dp->mst_mgr.cbs = &mst_cbs; 680 681 /* create encoders */ 682 intel_dp_create_fake_mst_encoders(intel_dig_port); 683 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, 684 &intel_dp->aux, 16, 3, conn_base_id); 685 if (ret) 686 return ret; 687 688 intel_dp->can_mst = true; 689 690 return 0; 691 } 692 693 void 694 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 695 { 696 struct intel_dp *intel_dp = &intel_dig_port->dp; 697 698 if (!intel_dp->can_mst) 699 return; 700 701 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 702 /* encoders will get killed by normal cleanup */ 703 } 704