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