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/drmP.h> 27 #include "i915_drv.h" 28 #include "intel_drv.h" 29 #include <drm/drm_atomic_helper.h> 30 #include <drm/drm_crtc_helper.h> 31 #include <drm/drm_edid.h> 32 33 #if 0 34 static bool intel_dp_mst_compute_config(struct intel_encoder *encoder, 35 struct intel_crtc_state *pipe_config) 36 { 37 struct drm_device *dev = encoder->base.dev; 38 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 39 struct intel_digital_port *intel_dig_port = intel_mst->primary; 40 struct intel_dp *intel_dp = &intel_dig_port->dp; 41 struct drm_atomic_state *state; 42 int bpp, i; 43 int lane_count, slots, rate; 44 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; 45 struct drm_connector *drm_connector; 46 struct intel_connector *connector, *found = NULL; 47 struct drm_connector_state *connector_state; 48 int mst_pbn; 49 50 pipe_config->dp_encoder_is_mst = true; 51 pipe_config->has_pch_encoder = false; 52 pipe_config->has_dp_encoder = true; 53 bpp = 24; 54 /* 55 * for MST we always configure max link bw - the spec doesn't 56 * seem to suggest we should do otherwise. 57 */ 58 lane_count = drm_dp_max_lane_count(intel_dp->dpcd); 59 60 rate = intel_dp_max_link_rate(intel_dp); 61 62 if (intel_dp->num_sink_rates) { 63 intel_dp->link_bw = 0; 64 intel_dp->rate_select = intel_dp_rate_select(intel_dp, rate); 65 } else { 66 intel_dp->link_bw = drm_dp_link_rate_to_bw_code(rate); 67 intel_dp->rate_select = 0; 68 } 69 70 intel_dp->lane_count = lane_count; 71 72 pipe_config->pipe_bpp = 24; 73 pipe_config->port_clock = rate; 74 75 state = pipe_config->base.state; 76 77 for_each_connector_in_state(state, drm_connector, connector_state, i) { 78 connector = to_intel_connector(drm_connector); 79 80 if (connector_state->best_encoder == &encoder->base) { 81 found = connector; 82 break; 83 } 84 } 85 86 if (!found) { 87 DRM_ERROR("can't find connector\n"); 88 return false; 89 } 90 91 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp); 92 93 pipe_config->pbn = mst_pbn; 94 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn); 95 96 intel_link_compute_m_n(bpp, lane_count, 97 adjusted_mode->crtc_clock, 98 pipe_config->port_clock, 99 &pipe_config->dp_m_n); 100 101 pipe_config->dp_m_n.tu = slots; 102 103 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) 104 hsw_dp_set_ddi_pll_sel(pipe_config); 105 106 return true; 107 108 } 109 110 static void intel_mst_disable_dp(struct intel_encoder *encoder) 111 { 112 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 113 struct intel_digital_port *intel_dig_port = intel_mst->primary; 114 struct intel_dp *intel_dp = &intel_dig_port->dp; 115 int ret; 116 117 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 118 119 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port); 120 121 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 122 if (ret) { 123 DRM_ERROR("failed to update payload %d\n", ret); 124 } 125 } 126 127 static void intel_mst_post_disable_dp(struct intel_encoder *encoder) 128 { 129 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 130 struct intel_digital_port *intel_dig_port = intel_mst->primary; 131 struct intel_dp *intel_dp = &intel_dig_port->dp; 132 133 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 134 135 /* this can fail */ 136 drm_dp_check_act_status(&intel_dp->mst_mgr); 137 /* and this can also fail */ 138 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 139 140 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port); 141 142 intel_dp->active_mst_links--; 143 intel_mst->port = NULL; 144 if (intel_dp->active_mst_links == 0) { 145 intel_dig_port->base.post_disable(&intel_dig_port->base); 146 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); 147 } 148 } 149 150 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder) 151 { 152 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 153 struct intel_digital_port *intel_dig_port = intel_mst->primary; 154 struct intel_dp *intel_dp = &intel_dig_port->dp; 155 struct drm_device *dev = encoder->base.dev; 156 struct drm_i915_private *dev_priv = dev->dev_private; 157 enum port port = intel_dig_port->port; 158 int ret; 159 uint32_t temp; 160 struct intel_connector *found = NULL, *connector; 161 int slots; 162 struct drm_crtc *crtc = encoder->base.crtc; 163 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 164 165 for_each_intel_connector(dev, connector) { 166 if (connector->base.state->best_encoder == &encoder->base) { 167 found = connector; 168 break; 169 } 170 } 171 172 if (!found) { 173 DRM_ERROR("can't find connector\n"); 174 return; 175 } 176 177 /* MST encoders are bound to a crtc, not to a connector, 178 * force the mapping here for get_hw_state. 179 */ 180 found->encoder = encoder; 181 182 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 183 intel_mst->port = found->port; 184 185 if (intel_dp->active_mst_links == 0) { 186 enum port port = intel_ddi_get_encoder_port(encoder); 187 188 /* FIXME: add support for SKL */ 189 if (INTEL_INFO(dev)->gen < 9) 190 I915_WRITE(PORT_CLK_SEL(port), 191 intel_crtc->config->ddi_pll_sel); 192 193 intel_ddi_init_dp_buf_reg(&intel_dig_port->base); 194 195 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 196 197 198 intel_dp_start_link_train(intel_dp); 199 intel_dp_complete_link_train(intel_dp); 200 intel_dp_stop_link_train(intel_dp); 201 } 202 203 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 204 intel_mst->port, 205 intel_crtc->config->pbn, &slots); 206 if (ret == false) { 207 DRM_ERROR("failed to allocate vcpi\n"); 208 return; 209 } 210 211 212 intel_dp->active_mst_links++; 213 temp = I915_READ(DP_TP_STATUS(port)); 214 I915_WRITE(DP_TP_STATUS(port), temp); 215 216 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 217 } 218 219 static void intel_mst_enable_dp(struct intel_encoder *encoder) 220 { 221 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 222 struct intel_digital_port *intel_dig_port = intel_mst->primary; 223 struct intel_dp *intel_dp = &intel_dig_port->dp; 224 struct drm_device *dev = intel_dig_port->base.base.dev; 225 struct drm_i915_private *dev_priv = dev->dev_private; 226 enum port port = intel_dig_port->port; 227 int ret; 228 229 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 230 231 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT), 232 1)) 233 DRM_ERROR("Timed out waiting for ACT sent\n"); 234 235 ret = drm_dp_check_act_status(&intel_dp->mst_mgr); 236 237 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr); 238 } 239 240 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 241 enum pipe *pipe) 242 { 243 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 244 *pipe = intel_mst->pipe; 245 if (intel_mst->port) 246 return true; 247 return false; 248 } 249 250 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 251 struct intel_crtc_state *pipe_config) 252 { 253 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 254 struct intel_digital_port *intel_dig_port = intel_mst->primary; 255 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); 256 struct drm_device *dev = encoder->base.dev; 257 struct drm_i915_private *dev_priv = dev->dev_private; 258 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder; 259 u32 temp, flags = 0; 260 261 pipe_config->has_dp_encoder = true; 262 263 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder)); 264 if (temp & TRANS_DDI_PHSYNC) 265 flags |= DRM_MODE_FLAG_PHSYNC; 266 else 267 flags |= DRM_MODE_FLAG_NHSYNC; 268 if (temp & TRANS_DDI_PVSYNC) 269 flags |= DRM_MODE_FLAG_PVSYNC; 270 else 271 flags |= DRM_MODE_FLAG_NVSYNC; 272 273 switch (temp & TRANS_DDI_BPC_MASK) { 274 case TRANS_DDI_BPC_6: 275 pipe_config->pipe_bpp = 18; 276 break; 277 case TRANS_DDI_BPC_8: 278 pipe_config->pipe_bpp = 24; 279 break; 280 case TRANS_DDI_BPC_10: 281 pipe_config->pipe_bpp = 30; 282 break; 283 case TRANS_DDI_BPC_12: 284 pipe_config->pipe_bpp = 36; 285 break; 286 default: 287 break; 288 } 289 pipe_config->base.adjusted_mode.flags |= flags; 290 intel_dp_get_m_n(crtc, pipe_config); 291 292 intel_ddi_clock_get(&intel_dig_port->base, pipe_config); 293 } 294 295 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 296 { 297 struct intel_connector *intel_connector = to_intel_connector(connector); 298 struct intel_dp *intel_dp = intel_connector->mst_port; 299 struct edid *edid; 300 int ret; 301 302 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 303 if (!edid) 304 return 0; 305 306 ret = intel_connector_update_modes(connector, edid); 307 kfree(edid); 308 309 return ret; 310 } 311 312 static enum drm_connector_status 313 intel_dp_mst_detect(struct drm_connector *connector, bool force) 314 { 315 struct intel_connector *intel_connector = to_intel_connector(connector); 316 struct intel_dp *intel_dp = intel_connector->mst_port; 317 318 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port); 319 } 320 321 static int 322 intel_dp_mst_set_property(struct drm_connector *connector, 323 struct drm_property *property, 324 uint64_t val) 325 { 326 return 0; 327 } 328 329 static void 330 intel_dp_mst_connector_destroy(struct drm_connector *connector) 331 { 332 struct intel_connector *intel_connector = to_intel_connector(connector); 333 334 if (!IS_ERR_OR_NULL(intel_connector->edid)) 335 kfree(intel_connector->edid); 336 337 drm_connector_cleanup(connector); 338 kfree(connector); 339 } 340 341 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 342 .dpms = drm_atomic_helper_connector_dpms, 343 .detect = intel_dp_mst_detect, 344 .fill_modes = drm_helper_probe_single_connector_modes, 345 .set_property = intel_dp_mst_set_property, 346 .atomic_get_property = intel_connector_atomic_get_property, 347 .destroy = intel_dp_mst_connector_destroy, 348 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 349 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 350 }; 351 352 static int intel_dp_mst_get_modes(struct drm_connector *connector) 353 { 354 return intel_dp_mst_get_ddc_modes(connector); 355 } 356 357 static enum drm_mode_status 358 intel_dp_mst_mode_valid(struct drm_connector *connector, 359 struct drm_display_mode *mode) 360 { 361 /* TODO - validate mode against available PBN for link */ 362 if (mode->clock < 10000) 363 return MODE_CLOCK_LOW; 364 365 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 366 return MODE_H_ILLEGAL; 367 368 return MODE_OK; 369 } 370 371 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, 372 struct drm_connector_state *state) 373 { 374 struct intel_connector *intel_connector = to_intel_connector(connector); 375 struct intel_dp *intel_dp = intel_connector->mst_port; 376 struct intel_crtc *crtc = to_intel_crtc(state->crtc); 377 378 return &intel_dp->mst_encoders[crtc->pipe]->base.base; 379 } 380 381 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector) 382 { 383 struct intel_connector *intel_connector = to_intel_connector(connector); 384 struct intel_dp *intel_dp = intel_connector->mst_port; 385 return &intel_dp->mst_encoders[0]->base.base; 386 } 387 388 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 389 .get_modes = intel_dp_mst_get_modes, 390 .mode_valid = intel_dp_mst_mode_valid, 391 .atomic_best_encoder = intel_mst_atomic_best_encoder, 392 .best_encoder = intel_mst_best_encoder, 393 }; 394 #endif 395 396 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 397 { 398 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 399 400 drm_encoder_cleanup(encoder); 401 kfree(intel_mst); 402 } 403 404 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 405 .destroy = intel_dp_mst_encoder_destroy, 406 }; 407 408 #if 0 409 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 410 { 411 if (connector->encoder && connector->base.state->crtc) { 412 enum pipe pipe; 413 if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) 414 return false; 415 return true; 416 } 417 return false; 418 } 419 420 static void intel_connector_add_to_fbdev(struct intel_connector *connector) 421 { 422 #ifdef CONFIG_DRM_FBDEV_EMULATION 423 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 424 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base); 425 #endif 426 } 427 428 static void intel_connector_remove_from_fbdev(struct intel_connector *connector) 429 { 430 #ifdef CONFIG_DRM_FBDEV_EMULATION 431 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 432 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base); 433 #endif 434 } 435 436 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) 437 { 438 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 439 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 440 struct drm_device *dev = intel_dig_port->base.base.dev; 441 struct intel_connector *intel_connector; 442 struct drm_connector *connector; 443 int i; 444 445 intel_connector = intel_connector_alloc(); 446 if (!intel_connector) 447 return NULL; 448 449 connector = &intel_connector->base; 450 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); 451 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 452 453 intel_connector->unregister = intel_connector_unregister; 454 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 455 intel_connector->mst_port = intel_dp; 456 intel_connector->port = port; 457 458 for (i = PIPE_A; i <= PIPE_C; i++) { 459 drm_mode_connector_attach_encoder(&intel_connector->base, 460 &intel_dp->mst_encoders[i]->base.base); 461 } 462 intel_dp_add_properties(intel_dp, connector); 463 464 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 465 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); 466 467 drm_mode_connector_set_path_property(connector, pathprop); 468 return connector; 469 } 470 471 static void intel_dp_register_mst_connector(struct drm_connector *connector) 472 { 473 struct intel_connector *intel_connector = to_intel_connector(connector); 474 struct drm_device *dev = connector->dev; 475 drm_modeset_lock_all(dev); 476 intel_connector_add_to_fbdev(intel_connector); 477 drm_modeset_unlock_all(dev); 478 drm_connector_register(&intel_connector->base); 479 } 480 481 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 482 struct drm_connector *connector) 483 { 484 struct intel_connector *intel_connector = to_intel_connector(connector); 485 struct drm_device *dev = connector->dev; 486 487 /* need to nuke the connector */ 488 drm_modeset_lock_all(dev); 489 if (connector->state->crtc) { 490 struct drm_mode_set set; 491 int ret; 492 493 memset(&set, 0, sizeof(set)); 494 set.crtc = connector->state->crtc, 495 496 ret = drm_atomic_helper_set_config(&set); 497 498 WARN(ret, "Disabling mst crtc failed with %i\n", ret); 499 } 500 drm_modeset_unlock_all(dev); 501 502 intel_connector->unregister(intel_connector); 503 504 drm_modeset_lock_all(dev); 505 intel_connector_remove_from_fbdev(intel_connector); 506 drm_connector_cleanup(connector); 507 drm_modeset_unlock_all(dev); 508 509 kfree(intel_connector); 510 DRM_DEBUG_KMS("\n"); 511 } 512 513 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr) 514 { 515 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 516 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 517 struct drm_device *dev = intel_dig_port->base.base.dev; 518 519 drm_kms_helper_hotplug_event(dev); 520 } 521 522 static struct drm_dp_mst_topology_cbs mst_cbs = { 523 .add_connector = intel_dp_add_mst_connector, 524 .register_connector = intel_dp_register_mst_connector, 525 .destroy_connector = intel_dp_destroy_mst_connector, 526 .hotplug = intel_dp_mst_hotplug, 527 }; 528 529 static struct intel_dp_mst_encoder * 530 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 531 { 532 struct intel_dp_mst_encoder *intel_mst; 533 struct intel_encoder *intel_encoder; 534 struct drm_device *dev = intel_dig_port->base.base.dev; 535 536 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 537 538 if (!intel_mst) 539 return NULL; 540 541 intel_mst->pipe = pipe; 542 intel_encoder = &intel_mst->base; 543 intel_mst->primary = intel_dig_port; 544 545 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 546 DRM_MODE_ENCODER_DPMST); 547 548 intel_encoder->type = INTEL_OUTPUT_DP_MST; 549 intel_encoder->crtc_mask = 0x7; 550 intel_encoder->cloneable = 0; 551 552 intel_encoder->compute_config = intel_dp_mst_compute_config; 553 intel_encoder->disable = intel_mst_disable_dp; 554 intel_encoder->post_disable = intel_mst_post_disable_dp; 555 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 556 intel_encoder->enable = intel_mst_enable_dp; 557 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 558 intel_encoder->get_config = intel_dp_mst_enc_get_config; 559 560 return intel_mst; 561 562 } 563 564 static bool 565 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 566 { 567 int i; 568 struct intel_dp *intel_dp = &intel_dig_port->dp; 569 570 for (i = PIPE_A; i <= PIPE_C; i++) 571 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i); 572 return true; 573 } 574 #endif 575 576 int 577 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 578 { 579 struct intel_dp *intel_dp = &intel_dig_port->dp; 580 #if 0 581 struct drm_device *dev = intel_dig_port->base.base.dev; 582 int ret; 583 584 intel_dp->can_mst = true; 585 intel_dp->mst_mgr.cbs = &mst_cbs; 586 587 /* create encoders */ 588 intel_dp_create_fake_mst_encoders(intel_dig_port); 589 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id); 590 if (ret) { 591 intel_dp->can_mst = false; 592 return ret; 593 } 594 #endif 595 intel_dp->can_mst = false; 596 return 0; 597 } 598 599 void 600 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 601 { 602 struct intel_dp *intel_dp = &intel_dig_port->dp; 603 604 if (!intel_dp->can_mst) 605 return; 606 607 #if 0 608 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 609 #endif 610 /* encoders will get killed by normal cleanup */ 611 } 612