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_crtc_helper.h> 30#include <drm/drm_edid.h> 31 32static bool intel_dp_mst_compute_config(struct intel_encoder *encoder, 33 struct intel_crtc_config *pipe_config) 34{ 35 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 36 struct intel_digital_port *intel_dig_port = intel_mst->primary; 37 struct intel_dp *intel_dp = &intel_dig_port->dp; 38 struct drm_device *dev = encoder->base.dev; 39 int bpp; 40 int lane_count, slots; 41 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; 42 struct intel_connector *found = NULL, *intel_connector; 43 int mst_pbn; 44 45 pipe_config->dp_encoder_is_mst = true; 46 pipe_config->has_pch_encoder = false; 47 pipe_config->has_dp_encoder = true; 48 bpp = 24; 49 /* 50 * for MST we always configure max link bw - the spec doesn't 51 * seem to suggest we should do otherwise. 52 */ 53 lane_count = drm_dp_max_lane_count(intel_dp->dpcd); 54 intel_dp->link_bw = intel_dp_max_link_bw(intel_dp); 55 intel_dp->lane_count = lane_count; 56 57 pipe_config->pipe_bpp = 24; 58 pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw); 59 60 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) { 61 if (intel_connector->new_encoder == encoder) { 62 found = intel_connector; 63 break; 64 } 65 } 66 67 if (!found) { 68 DRM_ERROR("can't find connector\n"); 69 return false; 70 } 71 72 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp); 73 74 pipe_config->pbn = mst_pbn; 75 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn); 76 77 intel_link_compute_m_n(bpp, lane_count, 78 adjusted_mode->crtc_clock, 79 pipe_config->port_clock, 80 &pipe_config->dp_m_n); 81 82 pipe_config->dp_m_n.tu = slots; 83 return true; 84 85} 86 87static void intel_mst_disable_dp(struct intel_encoder *encoder) 88{ 89 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 90 struct intel_digital_port *intel_dig_port = intel_mst->primary; 91 struct intel_dp *intel_dp = &intel_dig_port->dp; 92 int ret; 93 94 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 95 96 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port); 97 98 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 99 if (ret) { 100 DRM_ERROR("failed to update payload %d\n", ret); 101 } 102} 103 104static void intel_mst_post_disable_dp(struct intel_encoder *encoder) 105{ 106 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 107 struct intel_digital_port *intel_dig_port = intel_mst->primary; 108 struct intel_dp *intel_dp = &intel_dig_port->dp; 109 110 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 111 112 /* this can fail */ 113 drm_dp_check_act_status(&intel_dp->mst_mgr); 114 /* and this can also fail */ 115 drm_dp_update_payload_part2(&intel_dp->mst_mgr); 116 117 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port); 118 119 intel_dp->active_mst_links--; 120 intel_mst->port = NULL; 121 if (intel_dp->active_mst_links == 0) { 122 intel_dig_port->base.post_disable(&intel_dig_port->base); 123 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); 124 } 125} 126 127static void intel_mst_pre_enable_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 struct drm_device *dev = encoder->base.dev; 133 struct drm_i915_private *dev_priv = dev->dev_private; 134 enum port port = intel_dig_port->port; 135 int ret; 136 uint32_t temp; 137 struct intel_connector *found = NULL, *intel_connector; 138 int slots; 139 struct drm_crtc *crtc = encoder->base.crtc; 140 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 141 142 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) { 143 if (intel_connector->new_encoder == encoder) { 144 found = intel_connector; 145 break; 146 } 147 } 148 149 if (!found) { 150 DRM_ERROR("can't find connector\n"); 151 return; 152 } 153 154 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 155 intel_mst->port = found->port; 156 157 if (intel_dp->active_mst_links == 0) { 158 enum port port = intel_ddi_get_encoder_port(encoder); 159 160 I915_WRITE(PORT_CLK_SEL(port), intel_crtc->config.ddi_pll_sel); 161 162 intel_ddi_init_dp_buf_reg(&intel_dig_port->base); 163 164 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); 165 166 167 intel_dp_start_link_train(intel_dp); 168 intel_dp_complete_link_train(intel_dp); 169 intel_dp_stop_link_train(intel_dp); 170 } 171 172 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, 173 intel_mst->port, intel_crtc->config.pbn, &slots); 174 if (ret == false) { 175 DRM_ERROR("failed to allocate vcpi\n"); 176 return; 177 } 178 179 180 intel_dp->active_mst_links++; 181 temp = I915_READ(DP_TP_STATUS(port)); 182 I915_WRITE(DP_TP_STATUS(port), temp); 183 184 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); 185} 186 187static void intel_mst_enable_dp(struct intel_encoder *encoder) 188{ 189 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 190 struct intel_digital_port *intel_dig_port = intel_mst->primary; 191 struct intel_dp *intel_dp = &intel_dig_port->dp; 192 struct drm_device *dev = intel_dig_port->base.base.dev; 193 struct drm_i915_private *dev_priv = dev->dev_private; 194 enum port port = intel_dig_port->port; 195 int ret; 196 197 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); 198 199 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT), 200 1)) 201 DRM_ERROR("Timed out waiting for ACT sent\n"); 202 203 ret = drm_dp_check_act_status(&intel_dp->mst_mgr); 204 205 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr); 206} 207 208static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, 209 enum pipe *pipe) 210{ 211 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); 212 *pipe = intel_mst->pipe; 213 if (intel_mst->port) 214 return true; 215 return false; 216} 217 218static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, 219 struct intel_crtc_config *pipe_config) 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_crtc *crtc = to_intel_crtc(encoder->base.crtc); 224 struct drm_device *dev = encoder->base.dev; 225 struct drm_i915_private *dev_priv = dev->dev_private; 226 enum transcoder cpu_transcoder = crtc->config.cpu_transcoder; 227 u32 temp, flags = 0; 228 229 pipe_config->has_dp_encoder = true; 230 231 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder)); 232 if (temp & TRANS_DDI_PHSYNC) 233 flags |= DRM_MODE_FLAG_PHSYNC; 234 else 235 flags |= DRM_MODE_FLAG_NHSYNC; 236 if (temp & TRANS_DDI_PVSYNC) 237 flags |= DRM_MODE_FLAG_PVSYNC; 238 else 239 flags |= DRM_MODE_FLAG_NVSYNC; 240 241 switch (temp & TRANS_DDI_BPC_MASK) { 242 case TRANS_DDI_BPC_6: 243 pipe_config->pipe_bpp = 18; 244 break; 245 case TRANS_DDI_BPC_8: 246 pipe_config->pipe_bpp = 24; 247 break; 248 case TRANS_DDI_BPC_10: 249 pipe_config->pipe_bpp = 30; 250 break; 251 case TRANS_DDI_BPC_12: 252 pipe_config->pipe_bpp = 36; 253 break; 254 default: 255 break; 256 } 257 pipe_config->adjusted_mode.flags |= flags; 258 intel_dp_get_m_n(crtc, pipe_config); 259 260 intel_ddi_clock_get(&intel_dig_port->base, pipe_config); 261} 262 263static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) 264{ 265 struct intel_connector *intel_connector = to_intel_connector(connector); 266 struct intel_dp *intel_dp = intel_connector->mst_port; 267 struct edid *edid; 268 int ret; 269 270 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); 271 if (!edid) 272 return 0; 273 274 ret = intel_connector_update_modes(connector, edid); 275 kfree(edid); 276 277 return ret; 278} 279 280static enum drm_connector_status 281intel_mst_port_dp_detect(struct drm_connector *connector) 282{ 283 struct intel_connector *intel_connector = to_intel_connector(connector); 284 struct intel_dp *intel_dp = intel_connector->mst_port; 285 286 return drm_dp_mst_detect_port(&intel_dp->mst_mgr, intel_connector->port); 287} 288 289static enum drm_connector_status 290intel_dp_mst_detect(struct drm_connector *connector, bool force) 291{ 292 enum drm_connector_status status; 293 status = intel_mst_port_dp_detect(connector); 294 return status; 295} 296 297static int 298intel_dp_mst_set_property(struct drm_connector *connector, 299 struct drm_property *property, 300 uint64_t val) 301{ 302 return 0; 303} 304 305static void 306intel_dp_mst_connector_destroy(struct drm_connector *connector) 307{ 308 struct intel_connector *intel_connector = to_intel_connector(connector); 309 310 if (!IS_ERR_OR_NULL(intel_connector->edid)) 311 kfree(intel_connector->edid); 312 313 drm_connector_cleanup(connector); 314 kfree(connector); 315} 316 317static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { 318 .dpms = intel_connector_dpms, 319 .detect = intel_dp_mst_detect, 320 .fill_modes = drm_helper_probe_single_connector_modes, 321 .set_property = intel_dp_mst_set_property, 322 .destroy = intel_dp_mst_connector_destroy, 323}; 324 325static int intel_dp_mst_get_modes(struct drm_connector *connector) 326{ 327 return intel_dp_mst_get_ddc_modes(connector); 328} 329 330static enum drm_mode_status 331intel_dp_mst_mode_valid(struct drm_connector *connector, 332 struct drm_display_mode *mode) 333{ 334 /* TODO - validate mode against available PBN for link */ 335 if (mode->clock < 10000) 336 return MODE_CLOCK_LOW; 337 338 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 339 return MODE_H_ILLEGAL; 340 341 return MODE_OK; 342} 343 344static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector) 345{ 346 struct intel_connector *intel_connector = to_intel_connector(connector); 347 struct intel_dp *intel_dp = intel_connector->mst_port; 348 return &intel_dp->mst_encoders[0]->base.base; 349} 350 351static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { 352 .get_modes = intel_dp_mst_get_modes, 353 .mode_valid = intel_dp_mst_mode_valid, 354 .best_encoder = intel_mst_best_encoder, 355}; 356 357static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) 358{ 359 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); 360 361 drm_encoder_cleanup(encoder); 362 kfree(intel_mst); 363} 364 365static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { 366 .destroy = intel_dp_mst_encoder_destroy, 367}; 368 369static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) 370{ 371 if (connector->encoder) { 372 enum pipe pipe; 373 if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) 374 return false; 375 return true; 376 } 377 return false; 378} 379 380static void intel_connector_add_to_fbdev(struct intel_connector *connector) 381{ 382#ifdef CONFIG_DRM_I915_FBDEV 383 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 384 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base); 385#endif 386} 387 388static void intel_connector_remove_from_fbdev(struct intel_connector *connector) 389{ 390#ifdef CONFIG_DRM_I915_FBDEV 391 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 392 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base); 393#endif 394} 395 396static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, char *pathprop) 397{ 398 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 399 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 400 struct drm_device *dev = intel_dig_port->base.base.dev; 401 struct intel_connector *intel_connector; 402 struct drm_connector *connector; 403 int i; 404 405 intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); 406 if (!intel_connector) 407 return NULL; 408 409 connector = &intel_connector->base; 410 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); 411 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); 412 413 intel_connector->unregister = intel_connector_unregister; 414 intel_connector->get_hw_state = intel_dp_mst_get_hw_state; 415 intel_connector->mst_port = intel_dp; 416 intel_connector->port = port; 417 418 for (i = PIPE_A; i <= PIPE_C; i++) { 419 drm_mode_connector_attach_encoder(&intel_connector->base, 420 &intel_dp->mst_encoders[i]->base.base); 421 } 422 intel_dp_add_properties(intel_dp, connector); 423 424 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); 425 drm_mode_connector_set_path_property(connector, pathprop); 426 drm_reinit_primary_mode_group(dev); 427 mutex_lock(&dev->mode_config.mutex); 428 intel_connector_add_to_fbdev(intel_connector); 429 mutex_unlock(&dev->mode_config.mutex); 430 drm_connector_register(&intel_connector->base); 431 return connector; 432} 433 434static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 435 struct drm_connector *connector) 436{ 437 struct intel_connector *intel_connector = to_intel_connector(connector); 438 struct drm_device *dev = connector->dev; 439 /* need to nuke the connector */ 440 mutex_lock(&dev->mode_config.mutex); 441 intel_connector_dpms(connector, DRM_MODE_DPMS_OFF); 442 mutex_unlock(&dev->mode_config.mutex); 443 444 intel_connector->unregister(intel_connector); 445 446 mutex_lock(&dev->mode_config.mutex); 447 intel_connector_remove_from_fbdev(intel_connector); 448 drm_connector_cleanup(connector); 449 mutex_unlock(&dev->mode_config.mutex); 450 451 drm_reinit_primary_mode_group(dev); 452 453 kfree(intel_connector); 454 DRM_DEBUG_KMS("\n"); 455} 456 457static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr) 458{ 459 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); 460 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); 461 struct drm_device *dev = intel_dig_port->base.base.dev; 462 463 drm_kms_helper_hotplug_event(dev); 464} 465 466static struct drm_dp_mst_topology_cbs mst_cbs = { 467 .add_connector = intel_dp_add_mst_connector, 468 .destroy_connector = intel_dp_destroy_mst_connector, 469 .hotplug = intel_dp_mst_hotplug, 470}; 471 472static struct intel_dp_mst_encoder * 473intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) 474{ 475 struct intel_dp_mst_encoder *intel_mst; 476 struct intel_encoder *intel_encoder; 477 struct drm_device *dev = intel_dig_port->base.base.dev; 478 479 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); 480 481 if (!intel_mst) 482 return NULL; 483 484 intel_mst->pipe = pipe; 485 intel_encoder = &intel_mst->base; 486 intel_mst->primary = intel_dig_port; 487 488 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, 489 DRM_MODE_ENCODER_DPMST); 490 491 intel_encoder->type = INTEL_OUTPUT_DP_MST; 492 intel_encoder->crtc_mask = 0x7; 493 intel_encoder->cloneable = 0; 494 495 intel_encoder->compute_config = intel_dp_mst_compute_config; 496 intel_encoder->disable = intel_mst_disable_dp; 497 intel_encoder->post_disable = intel_mst_post_disable_dp; 498 intel_encoder->pre_enable = intel_mst_pre_enable_dp; 499 intel_encoder->enable = intel_mst_enable_dp; 500 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; 501 intel_encoder->get_config = intel_dp_mst_enc_get_config; 502 503 return intel_mst; 504 505} 506 507static bool 508intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) 509{ 510 int i; 511 struct intel_dp *intel_dp = &intel_dig_port->dp; 512 513 for (i = PIPE_A; i <= PIPE_C; i++) 514 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i); 515 return true; 516} 517 518int 519intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) 520{ 521 struct intel_dp *intel_dp = &intel_dig_port->dp; 522 struct drm_device *dev = intel_dig_port->base.base.dev; 523 int ret; 524 525 intel_dp->can_mst = true; 526 intel_dp->mst_mgr.cbs = &mst_cbs; 527 528 /* create encoders */ 529 intel_dp_create_fake_mst_encoders(intel_dig_port); 530 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id); 531 if (ret) { 532 intel_dp->can_mst = false; 533 return ret; 534 } 535 return 0; 536} 537 538void 539intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) 540{ 541 struct intel_dp *intel_dp = &intel_dig_port->dp; 542 543 if (!intel_dp->can_mst) 544 return; 545 546 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); 547 /* encoders will get killed by normal cleanup */ 548} 549