1 /* 2 * Copyright 2022 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 /* FILE POLICY AND INTENDED USAGE: 27 * This file manages link detection states and receiver states by using various 28 * link protocols. It also provides helper functions to interpret certain 29 * capabilities or status based on the states it manages or retrieve them 30 * directly from connected receivers. 31 */ 32 33 #include "link_dpms.h" 34 #include "link_detection.h" 35 #include "link_hwss.h" 36 #include "protocols/link_edp_panel_control.h" 37 #include "protocols/link_ddc.h" 38 #include "protocols/link_hpd.h" 39 #include "protocols/link_dpcd.h" 40 #include "protocols/link_dp_capability.h" 41 #include "protocols/link_dp_dpia.h" 42 #include "protocols/link_dp_phy.h" 43 #include "protocols/link_dp_training.h" 44 #include "protocols/link_dp_dpia_bw.h" 45 #include "accessories/link_dp_trace.h" 46 47 #include "link_enc_cfg.h" 48 #include "dm_helpers.h" 49 #include "clk_mgr.h" 50 51 // Offset DPCD 050Eh == 0x5A 52 #define MST_HUB_ID_0x5A 0x5A 53 54 #define DC_LOGGER \ 55 link->ctx->logger 56 #define DC_LOGGER_INIT(logger) 57 58 #define LINK_INFO(...) \ 59 DC_LOG_HW_HOTPLUG( \ 60 __VA_ARGS__) 61 /* 62 * Some receivers fail to train on first try and are good 63 * on subsequent tries. 2 retries should be plenty. If we 64 * don't have a successful training then we don't expect to 65 * ever get one. 66 */ 67 #define LINK_TRAINING_MAX_VERIFY_RETRY 2 68 69 static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u"; 70 71 static const u8 dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR"; 72 73 static enum ddc_transaction_type get_ddc_transaction_type(enum signal_type sink_signal) 74 { 75 enum ddc_transaction_type transaction_type = DDC_TRANSACTION_TYPE_NONE; 76 77 switch (sink_signal) { 78 case SIGNAL_TYPE_DVI_SINGLE_LINK: 79 case SIGNAL_TYPE_DVI_DUAL_LINK: 80 case SIGNAL_TYPE_HDMI_TYPE_A: 81 case SIGNAL_TYPE_LVDS: 82 case SIGNAL_TYPE_RGB: 83 transaction_type = DDC_TRANSACTION_TYPE_I2C; 84 break; 85 86 case SIGNAL_TYPE_DISPLAY_PORT: 87 case SIGNAL_TYPE_EDP: 88 transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX; 89 break; 90 91 case SIGNAL_TYPE_DISPLAY_PORT_MST: 92 /* MST does not use I2COverAux, but there is the 93 * SPECIAL use case for "immediate dwnstrm device 94 * access" (EPR#370830). 95 */ 96 transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX; 97 break; 98 99 default: 100 break; 101 } 102 103 return transaction_type; 104 } 105 106 static enum signal_type get_basic_signal_type(struct graphics_object_id encoder, 107 struct graphics_object_id downstream) 108 { 109 if (downstream.type == OBJECT_TYPE_CONNECTOR) { 110 switch (downstream.id) { 111 case CONNECTOR_ID_SINGLE_LINK_DVII: 112 switch (encoder.id) { 113 case ENCODER_ID_INTERNAL_DAC1: 114 case ENCODER_ID_INTERNAL_KLDSCP_DAC1: 115 case ENCODER_ID_INTERNAL_DAC2: 116 case ENCODER_ID_INTERNAL_KLDSCP_DAC2: 117 return SIGNAL_TYPE_RGB; 118 default: 119 return SIGNAL_TYPE_DVI_SINGLE_LINK; 120 } 121 break; 122 case CONNECTOR_ID_DUAL_LINK_DVII: 123 { 124 switch (encoder.id) { 125 case ENCODER_ID_INTERNAL_DAC1: 126 case ENCODER_ID_INTERNAL_KLDSCP_DAC1: 127 case ENCODER_ID_INTERNAL_DAC2: 128 case ENCODER_ID_INTERNAL_KLDSCP_DAC2: 129 return SIGNAL_TYPE_RGB; 130 default: 131 return SIGNAL_TYPE_DVI_DUAL_LINK; 132 } 133 } 134 break; 135 case CONNECTOR_ID_SINGLE_LINK_DVID: 136 return SIGNAL_TYPE_DVI_SINGLE_LINK; 137 case CONNECTOR_ID_DUAL_LINK_DVID: 138 return SIGNAL_TYPE_DVI_DUAL_LINK; 139 case CONNECTOR_ID_VGA: 140 return SIGNAL_TYPE_RGB; 141 case CONNECTOR_ID_HDMI_TYPE_A: 142 return SIGNAL_TYPE_HDMI_TYPE_A; 143 case CONNECTOR_ID_LVDS: 144 return SIGNAL_TYPE_LVDS; 145 case CONNECTOR_ID_DISPLAY_PORT: 146 case CONNECTOR_ID_USBC: 147 return SIGNAL_TYPE_DISPLAY_PORT; 148 case CONNECTOR_ID_EDP: 149 return SIGNAL_TYPE_EDP; 150 default: 151 return SIGNAL_TYPE_NONE; 152 } 153 } 154 155 return SIGNAL_TYPE_NONE; 156 } 157 158 /* 159 * @brief 160 * Detect output sink type 161 */ 162 static enum signal_type link_detect_sink_signal_type(struct dc_link *link, 163 enum dc_detect_reason reason) 164 { 165 enum signal_type result; 166 struct audio_support *aud_support; 167 struct graphics_object_id enc_id; 168 169 /* External DP bridges should use DP signal regardless of connector type. */ 170 if (link->ext_enc_id.id) 171 return SIGNAL_TYPE_DISPLAY_PORT; 172 173 if (link->is_dig_mapping_flexible) 174 enc_id = (struct graphics_object_id){.id = ENCODER_ID_UNKNOWN}; 175 else 176 enc_id = link->link_enc->id; 177 result = get_basic_signal_type(enc_id, link->link_id); 178 179 /* Use basic signal type for link without physical connector. */ 180 if (link->ep_type != DISPLAY_ENDPOINT_PHY) 181 return result; 182 183 /* 184 * Internal digital encoder will detect only dongles 185 * that require digital signal 186 */ 187 188 /* 189 * Detection mechanism is different 190 * for different native connectors. 191 * LVDS connector supports only LVDS signal; 192 * PCIE is a bus slot, the actual connector needs to be detected first; 193 * eDP connector supports only eDP signal; 194 * HDMI should check straps for audio 195 */ 196 switch (link->link_id.id) { 197 case CONNECTOR_ID_HDMI_TYPE_A: 198 /* 199 * check audio support: 200 * if native HDMI is not supported, switch to DVI 201 */ 202 aud_support = &link->dc->res_pool->audio_support; 203 204 if (!aud_support->hdmi_audio_native) 205 result = SIGNAL_TYPE_DVI_SINGLE_LINK; 206 break; 207 case CONNECTOR_ID_DISPLAY_PORT: 208 case CONNECTOR_ID_USBC: 209 /* 210 * DP HPD short pulse. Passive DP dongle will not 211 * have short pulse 212 */ 213 if (reason != DETECT_REASON_HPDRX) { 214 /* 215 * Check whether DP signal detected: if not - 216 * we assume signal is DVI; it could be corrected 217 * to HDMI after dongle detection 218 */ 219 if (!dm_helpers_is_dp_sink_present(link)) 220 result = SIGNAL_TYPE_DVI_SINGLE_LINK; 221 } 222 break; 223 case CONNECTOR_ID_PCIE: 224 /* ZAZTODO implement PCIE add-on card detection */ 225 break; 226 default: 227 break; 228 } 229 230 return result; 231 } 232 233 static enum signal_type decide_signal_from_strap_and_dongle_type(enum display_dongle_type dongle_type, 234 struct audio_support *audio_support) 235 { 236 enum signal_type signal = SIGNAL_TYPE_NONE; 237 238 switch (dongle_type) { 239 case DISPLAY_DONGLE_DP_HDMI_DONGLE: 240 if (audio_support->hdmi_audio_on_dongle) 241 signal = SIGNAL_TYPE_HDMI_TYPE_A; 242 else 243 signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 244 break; 245 case DISPLAY_DONGLE_DP_DVI_DONGLE: 246 signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 247 break; 248 case DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE: 249 if (audio_support->hdmi_audio_native) 250 signal = SIGNAL_TYPE_HDMI_TYPE_A; 251 else 252 signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 253 break; 254 default: 255 signal = SIGNAL_TYPE_NONE; 256 break; 257 } 258 259 return signal; 260 } 261 262 static void read_scdc_caps(struct ddc_service *ddc_service, 263 struct dc_sink *sink) 264 { 265 uint8_t slave_address = HDMI_SCDC_ADDRESS; 266 uint8_t offset = HDMI_SCDC_MANUFACTURER_OUI; 267 268 if (ddc_service->link->local_sink && 269 !ddc_service->link->local_sink->edid_caps.scdc_present) 270 return; 271 272 link_query_ddc_data(ddc_service, slave_address, &offset, 273 sizeof(offset), sink->scdc_caps.manufacturer_OUI.byte, 274 sizeof(sink->scdc_caps.manufacturer_OUI.byte)); 275 276 offset = HDMI_SCDC_DEVICE_ID; 277 278 link_query_ddc_data(ddc_service, slave_address, &offset, 279 sizeof(offset), &(sink->scdc_caps.device_id.byte), 280 sizeof(sink->scdc_caps.device_id.byte)); 281 } 282 283 static bool i2c_read( 284 struct ddc_service *ddc, 285 uint32_t address, 286 uint8_t *buffer, 287 uint32_t len) 288 { 289 uint8_t offs_data = 0; 290 struct i2c_payload payloads[2] = { 291 { 292 .write = true, 293 .address = address, 294 .length = 1, 295 .data = &offs_data }, 296 { 297 .write = false, 298 .address = address, 299 .length = len, 300 .data = buffer } }; 301 302 struct i2c_command command = { 303 .payloads = payloads, 304 .number_of_payloads = 2, 305 .engine = DDC_I2C_COMMAND_ENGINE, 306 .speed = ddc->ctx->dc->caps.i2c_speed_in_khz }; 307 308 return dm_helpers_submit_i2c( 309 ddc->ctx, 310 ddc->link, 311 &command); 312 } 313 314 enum { 315 DP_SINK_CAP_SIZE = 316 DP_EDP_CONFIGURATION_CAP - DP_DPCD_REV + 1 317 }; 318 319 static void query_dp_dual_mode_adaptor( 320 struct ddc_service *ddc, 321 struct display_sink_capability *sink_cap) 322 { 323 uint8_t i; 324 bool is_valid_hdmi_signature; 325 enum display_dongle_type *dongle = &sink_cap->dongle_type; 326 uint8_t type2_dongle_buf[DP_ADAPTOR_TYPE2_SIZE]; 327 bool is_type2_dongle = false; 328 int retry_count = 2; 329 struct dp_hdmi_dongle_signature_data *dongle_signature; 330 struct dc_link *link = ddc->link; 331 332 /* Assume we have no valid DP passive dongle connected */ 333 *dongle = DISPLAY_DONGLE_NONE; 334 sink_cap->max_hdmi_pixel_clock = DP_ADAPTOR_DVI_MAX_TMDS_CLK; 335 336 /* Read DP-HDMI dongle I2c (no response interpreted as DP-DVI dongle)*/ 337 if (!i2c_read( 338 ddc, 339 DP_HDMI_DONGLE_ADDRESS, 340 type2_dongle_buf, 341 sizeof(type2_dongle_buf))) { 342 /* Passive HDMI dongles can sometimes fail here without retrying*/ 343 while (retry_count > 0) { 344 if (i2c_read(ddc, 345 DP_HDMI_DONGLE_ADDRESS, 346 type2_dongle_buf, 347 sizeof(type2_dongle_buf))) 348 break; 349 retry_count--; 350 } 351 if (retry_count == 0) { 352 *dongle = DISPLAY_DONGLE_DP_DVI_DONGLE; 353 sink_cap->max_hdmi_pixel_clock = DP_ADAPTOR_DVI_MAX_TMDS_CLK; 354 355 CONN_DATA_DETECT(link, type2_dongle_buf, sizeof(type2_dongle_buf), 356 "DP-DVI passive dongle %dMhz: ", 357 DP_ADAPTOR_DVI_MAX_TMDS_CLK / 1000); 358 return; 359 } 360 } 361 362 /* Check if Type 2 dongle.*/ 363 if (type2_dongle_buf[DP_ADAPTOR_TYPE2_REG_ID] == DP_ADAPTOR_TYPE2_ID) 364 is_type2_dongle = true; 365 366 dongle_signature = 367 (struct dp_hdmi_dongle_signature_data *)type2_dongle_buf; 368 369 is_valid_hdmi_signature = true; 370 371 /* Check EOT */ 372 if (dongle_signature->eot != DP_HDMI_DONGLE_SIGNATURE_EOT) { 373 is_valid_hdmi_signature = false; 374 } 375 376 /* Check signature */ 377 for (i = 0; i < sizeof(dongle_signature->id); ++i) { 378 /* If its not the right signature, 379 * skip mismatch in subversion byte.*/ 380 if (dongle_signature->id[i] != 381 dp_hdmi_dongle_signature_str[i] && i != 3) { 382 383 if (is_type2_dongle) { 384 is_valid_hdmi_signature = false; 385 break; 386 } 387 388 } 389 } 390 if (is_valid_hdmi_signature) 391 sink_cap->max_hdmi_pixel_clock = DP_ADAPTOR_HDMI_SAFE_MAX_TMDS_CLK; 392 393 if (is_type2_dongle) { 394 uint32_t max_tmds_clk = 395 type2_dongle_buf[DP_ADAPTOR_TYPE2_REG_MAX_TMDS_CLK]; 396 397 max_tmds_clk = max_tmds_clk * 2 + max_tmds_clk / 2; 398 399 if (0 == max_tmds_clk || 400 max_tmds_clk < DP_ADAPTOR_TYPE2_MIN_TMDS_CLK || 401 max_tmds_clk > DP_ADAPTOR_TYPE2_MAX_TMDS_CLK) { 402 *dongle = DISPLAY_DONGLE_DP_DVI_DONGLE; 403 404 CONN_DATA_DETECT(ddc->link, type2_dongle_buf, 405 sizeof(type2_dongle_buf), 406 "DP-DVI passive dongle %dMhz: ", 407 DP_ADAPTOR_DVI_MAX_TMDS_CLK / 1000); 408 } else { 409 if (is_valid_hdmi_signature == true) { 410 *dongle = DISPLAY_DONGLE_DP_HDMI_DONGLE; 411 412 CONN_DATA_DETECT(ddc->link, type2_dongle_buf, 413 sizeof(type2_dongle_buf), 414 "Type 2 DP-HDMI passive dongle %dMhz: ", 415 max_tmds_clk); 416 } else { 417 *dongle = DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE; 418 419 CONN_DATA_DETECT(ddc->link, type2_dongle_buf, 420 sizeof(type2_dongle_buf), 421 "Type 2 DP-HDMI passive dongle (no signature) %dMhz: ", 422 max_tmds_clk); 423 424 } 425 426 /* Multiply by 1000 to convert to kHz. */ 427 sink_cap->max_hdmi_pixel_clock = 428 max_tmds_clk * 1000; 429 } 430 sink_cap->is_dongle_type_one = false; 431 432 } else { 433 if (is_valid_hdmi_signature == true) { 434 *dongle = DISPLAY_DONGLE_DP_HDMI_DONGLE; 435 436 CONN_DATA_DETECT(ddc->link, type2_dongle_buf, 437 sizeof(type2_dongle_buf), 438 "Type 1 DP-HDMI passive dongle %dMhz: ", 439 sink_cap->max_hdmi_pixel_clock / 1000); 440 } else { 441 *dongle = DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE; 442 443 CONN_DATA_DETECT(ddc->link, type2_dongle_buf, 444 sizeof(type2_dongle_buf), 445 "Type 1 DP-HDMI passive dongle (no signature) %dMhz: ", 446 sink_cap->max_hdmi_pixel_clock / 1000); 447 } 448 sink_cap->is_dongle_type_one = true; 449 } 450 451 return; 452 } 453 454 static enum signal_type dp_passive_dongle_detection(struct ddc_service *ddc, 455 struct display_sink_capability *sink_cap, 456 struct audio_support *audio_support) 457 { 458 query_dp_dual_mode_adaptor(ddc, sink_cap); 459 460 return decide_signal_from_strap_and_dongle_type(sink_cap->dongle_type, 461 audio_support); 462 } 463 464 static void link_disconnect_sink(struct dc_link *link) 465 { 466 if (link->local_sink) { 467 dc_sink_release(link->local_sink); 468 link->local_sink = NULL; 469 } 470 471 link->dpcd_sink_count = 0; 472 //link->dpcd_caps.dpcd_rev.raw = 0; 473 } 474 475 static void link_disconnect_remap(struct dc_sink *prev_sink, struct dc_link *link) 476 { 477 dc_sink_release(link->local_sink); 478 link->local_sink = prev_sink; 479 } 480 481 static void query_hdcp_capability(enum signal_type signal, struct dc_link *link) 482 { 483 struct hdcp_protection_message msg22; 484 struct hdcp_protection_message msg14; 485 486 memset(&msg22, 0, sizeof(struct hdcp_protection_message)); 487 memset(&msg14, 0, sizeof(struct hdcp_protection_message)); 488 memset(link->hdcp_caps.rx_caps.raw, 0, 489 sizeof(link->hdcp_caps.rx_caps.raw)); 490 491 if ((link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && 492 link->ddc->transaction_type == 493 DDC_TRANSACTION_TYPE_I2C_OVER_AUX) || 494 link->connector_signal == SIGNAL_TYPE_EDP) { 495 msg22.data = link->hdcp_caps.rx_caps.raw; 496 msg22.length = sizeof(link->hdcp_caps.rx_caps.raw); 497 msg22.msg_id = HDCP_MESSAGE_ID_RX_CAPS; 498 } else { 499 msg22.data = &link->hdcp_caps.rx_caps.fields.version; 500 msg22.length = sizeof(link->hdcp_caps.rx_caps.fields.version); 501 msg22.msg_id = HDCP_MESSAGE_ID_HDCP2VERSION; 502 } 503 msg22.version = HDCP_VERSION_22; 504 msg22.link = HDCP_LINK_PRIMARY; 505 msg22.max_retries = 5; 506 dc_process_hdcp_msg(signal, link, &msg22); 507 508 if (signal == SIGNAL_TYPE_DISPLAY_PORT || signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { 509 msg14.data = &link->hdcp_caps.bcaps.raw; 510 msg14.length = sizeof(link->hdcp_caps.bcaps.raw); 511 msg14.msg_id = HDCP_MESSAGE_ID_READ_BCAPS; 512 msg14.version = HDCP_VERSION_14; 513 msg14.link = HDCP_LINK_PRIMARY; 514 msg14.max_retries = 5; 515 516 dc_process_hdcp_msg(signal, link, &msg14); 517 } 518 519 } 520 static void read_current_link_settings_on_detect(struct dc_link *link) 521 { 522 union lane_count_set lane_count_set = {0}; 523 uint8_t link_bw_set = 0; 524 uint8_t link_rate_set = 0; 525 uint32_t read_dpcd_retry_cnt = 10; 526 enum dc_status status = DC_ERROR_UNEXPECTED; 527 int i; 528 union max_down_spread max_down_spread = {0}; 529 530 // Read DPCD 00101h to find out the number of lanes currently set 531 for (i = 0; i < read_dpcd_retry_cnt; i++) { 532 status = core_link_read_dpcd(link, 533 DP_LANE_COUNT_SET, 534 &lane_count_set.raw, 535 sizeof(lane_count_set)); 536 /* First DPCD read after VDD ON can fail if the particular board 537 * does not have HPD pin wired correctly. So if DPCD read fails, 538 * which it should never happen, retry a few times. Target worst 539 * case scenario of 80 ms. 540 */ 541 if (status == DC_OK) { 542 link->cur_link_settings.lane_count = 543 lane_count_set.bits.LANE_COUNT_SET; 544 break; 545 } 546 547 msleep(8); 548 } 549 550 // Read DPCD 00100h to find if standard link rates are set 551 core_link_read_dpcd(link, DP_LINK_BW_SET, 552 &link_bw_set, sizeof(link_bw_set)); 553 554 if (link_bw_set == 0) { 555 if (link->connector_signal == SIGNAL_TYPE_EDP) { 556 /* If standard link rates are not being used, 557 * Read DPCD 00115h to find the edp link rate set used 558 */ 559 core_link_read_dpcd(link, DP_LINK_RATE_SET, 560 &link_rate_set, sizeof(link_rate_set)); 561 562 // edp_supported_link_rates_count = 0 for DP 563 if (link_rate_set < link->dpcd_caps.edp_supported_link_rates_count) { 564 link->cur_link_settings.link_rate = 565 link->dpcd_caps.edp_supported_link_rates[link_rate_set]; 566 link->cur_link_settings.link_rate_set = link_rate_set; 567 link->cur_link_settings.use_link_rate_set = true; 568 } 569 } else { 570 // Link Rate not found. Seamless boot may not work. 571 ASSERT(false); 572 } 573 } else { 574 link->cur_link_settings.link_rate = link_bw_set; 575 link->cur_link_settings.use_link_rate_set = false; 576 } 577 // Read DPCD 00003h to find the max down spread. 578 core_link_read_dpcd(link, DP_MAX_DOWNSPREAD, 579 &max_down_spread.raw, sizeof(max_down_spread)); 580 link->cur_link_settings.link_spread = 581 max_down_spread.bits.MAX_DOWN_SPREAD ? 582 LINK_SPREAD_05_DOWNSPREAD_30KHZ : LINK_SPREAD_DISABLED; 583 } 584 585 static bool detect_dp(struct dc_link *link, 586 struct display_sink_capability *sink_caps, 587 enum dc_detect_reason reason) 588 { 589 struct audio_support *audio_support = &link->dc->res_pool->audio_support; 590 591 sink_caps->signal = link_detect_sink_signal_type(link, reason); 592 sink_caps->transaction_type = 593 get_ddc_transaction_type(sink_caps->signal); 594 595 if (sink_caps->transaction_type == DDC_TRANSACTION_TYPE_I2C_OVER_AUX) { 596 sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT; 597 if (!detect_dp_sink_caps(link)) { 598 return false; 599 } 600 601 if (is_dp_branch_device(link)) 602 /* DP SST branch */ 603 link->type = dc_connection_sst_branch; 604 } else { 605 if (link->dc->debug.disable_dp_plus_plus_wa && 606 link->link_enc->features.flags.bits.IS_UHBR20_CAPABLE) 607 return false; 608 609 /* DP passive dongles */ 610 sink_caps->signal = dp_passive_dongle_detection(link->ddc, 611 sink_caps, 612 audio_support); 613 link->dpcd_caps.dongle_type = sink_caps->dongle_type; 614 link->dpcd_caps.is_dongle_type_one = sink_caps->is_dongle_type_one; 615 link->dpcd_caps.dpcd_rev.raw = 0; 616 link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw = 0; 617 } 618 619 if (link->ext_enc_id.id) { 620 /* Fix number of connected sinks reported by external DP bridge */ 621 link->dpcd_caps.sink_count.bits.SINK_COUNT = 1; 622 /* NUTMEG requires that we use HBR, doesn't work with RBR. */ 623 if (link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_00001A) 624 link->preferred_link_setting.link_rate = LINK_RATE_HIGH; 625 } 626 627 return true; 628 } 629 630 static bool is_same_edid(struct dc_edid *old_edid, struct dc_edid *new_edid) 631 { 632 if (old_edid == NULL || new_edid == NULL) 633 return false; 634 635 if (old_edid->length != new_edid->length) 636 return false; 637 638 if (new_edid->length == 0) 639 return false; 640 641 return (memcmp(old_edid->raw_edid, 642 new_edid->raw_edid, new_edid->length) == 0); 643 } 644 645 static bool wait_for_entering_dp_alt_mode(struct dc_link *link) 646 { 647 648 /** 649 * something is terribly wrong if time out is > 200ms. (5Hz) 650 * 500 microseconds * 400 tries us 200 ms 651 **/ 652 unsigned int sleep_time_in_microseconds = 500; 653 unsigned int tries_allowed = 400; 654 bool is_in_alt_mode; 655 unsigned long long enter_timestamp; 656 unsigned long long finish_timestamp; 657 unsigned long long time_taken_in_ns; 658 int tries_taken; 659 660 /** 661 * this function will only exist if we are on dcn21 (is_in_alt_mode is a 662 * function pointer, so checking to see if it is equal to 0 is the same 663 * as checking to see if it is null 664 **/ 665 if (!link->link_enc->funcs->is_in_alt_mode) 666 return true; 667 668 is_in_alt_mode = link->link_enc->funcs->is_in_alt_mode(link->link_enc); 669 DC_LOG_DC("DP Alt mode state on HPD: %d Link=%d\n", is_in_alt_mode, link->link_index); 670 671 if (is_in_alt_mode) 672 return true; 673 674 enter_timestamp = dm_get_timestamp(link->ctx); 675 676 for (tries_taken = 0; tries_taken < tries_allowed; tries_taken++) { 677 udelay(sleep_time_in_microseconds); 678 /* ask the link if alt mode is enabled, if so return ok */ 679 if (link->link_enc->funcs->is_in_alt_mode(link->link_enc)) { 680 finish_timestamp = dm_get_timestamp(link->ctx); 681 time_taken_in_ns = 682 dm_get_elapse_time_in_ns(link->ctx, 683 finish_timestamp, 684 enter_timestamp); 685 DC_LOG_WARNING("Alt mode entered finished after %llu ms\n", 686 div_u64(time_taken_in_ns, 1000000)); 687 return true; 688 } 689 } 690 finish_timestamp = dm_get_timestamp(link->ctx); 691 time_taken_in_ns = dm_get_elapse_time_in_ns(link->ctx, finish_timestamp, 692 enter_timestamp); 693 DC_LOG_WARNING("Alt mode has timed out after %llu ms\n", 694 div_u64(time_taken_in_ns, 1000000)); 695 return false; 696 } 697 698 static void apply_dpia_mst_dsc_always_on_wa(struct dc_link *link) 699 { 700 /* Apply work around for tunneled MST on certain USB4 docks. Always use DSC if dock 701 * reports DSC support. 702 */ 703 if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && 704 link->type == dc_connection_mst_branch && 705 link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_90CC24 && 706 link->dpcd_caps.branch_hw_revision == DP_BRANCH_HW_REV_20 && 707 link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT && 708 !link->dc->debug.dpia_debug.bits.disable_mst_dsc_work_around) 709 link->wa_flags.dpia_mst_dsc_always_on = true; 710 711 if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && 712 link->type == dc_connection_mst_branch && 713 link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_90CC24 && 714 link->dpcd_caps.branch_vendor_specific_data[2] == MST_HUB_ID_0x5A && 715 link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT && 716 !link->dc->debug.dpia_debug.bits.disable_mst_dsc_work_around) { 717 link->wa_flags.dpia_mst_dsc_always_on = true; 718 } 719 } 720 721 static void revert_dpia_mst_dsc_always_on_wa(struct dc_link *link) 722 { 723 /* Disable work around which keeps DSC on for tunneled MST on certain USB4 docks. */ 724 if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) 725 link->wa_flags.dpia_mst_dsc_always_on = false; 726 } 727 728 static bool discover_dp_mst_topology(struct dc_link *link, enum dc_detect_reason reason) 729 { 730 LINK_INFO("link=%d, mst branch is now Connected\n", 731 link->link_index); 732 733 link->type = dc_connection_mst_branch; 734 apply_dpia_mst_dsc_always_on_wa(link); 735 736 dm_helpers_dp_update_branch_info(link->ctx, link); 737 if (dm_helpers_dp_mst_start_top_mgr(link->ctx, 738 link, (reason == DETECT_REASON_BOOT || reason == DETECT_REASON_RESUMEFROMS3S4))) { 739 link_disconnect_sink(link); 740 } else { 741 link->type = dc_connection_sst_branch; 742 } 743 744 return link->type == dc_connection_mst_branch; 745 } 746 747 bool link_reset_cur_dp_mst_topology(struct dc_link *link) 748 { 749 LINK_INFO("link=%d, mst branch is now Disconnected\n", 750 link->link_index); 751 752 revert_dpia_mst_dsc_always_on_wa(link); 753 return dm_helpers_dp_mst_stop_top_mgr(link->ctx, link); 754 } 755 756 static bool should_prepare_phy_clocks_for_link_verification(const struct dc *dc, 757 enum dc_detect_reason reason) 758 { 759 int i; 760 bool can_apply_seamless_boot = false; 761 762 for (i = 0; i < dc->current_state->stream_count; i++) { 763 if (dc->current_state->streams[i]->apply_seamless_boot_optimization) { 764 can_apply_seamless_boot = true; 765 break; 766 } 767 } 768 769 return !can_apply_seamless_boot && reason != DETECT_REASON_BOOT; 770 } 771 772 static void prepare_phy_clocks_for_destructive_link_verification(const struct dc *dc) 773 { 774 dc_z10_restore(dc); 775 clk_mgr_exit_optimized_pwr_state(dc, dc->clk_mgr); 776 } 777 778 static void restore_phy_clocks_for_destructive_link_verification(const struct dc *dc) 779 { 780 clk_mgr_optimize_pwr_state(dc, dc->clk_mgr); 781 } 782 783 static void verify_link_capability_destructive(struct dc_link *link, 784 struct dc_sink *sink, 785 enum dc_detect_reason reason) 786 { 787 (void)sink; 788 bool should_prepare_phy_clocks = 789 should_prepare_phy_clocks_for_link_verification(link->dc, reason); 790 791 if (should_prepare_phy_clocks) 792 prepare_phy_clocks_for_destructive_link_verification(link->dc); 793 794 if (dc_is_dp_signal(link->local_sink->sink_signal)) { 795 struct dc_link_settings known_limit_link_setting = 796 dp_get_max_link_cap(link); 797 link_set_all_streams_dpms_off_for_link(link); 798 dp_verify_link_cap_with_retries( 799 link, &known_limit_link_setting, 800 LINK_TRAINING_MAX_VERIFY_RETRY); 801 } else { 802 ASSERT(0); 803 } 804 805 if (should_prepare_phy_clocks) 806 restore_phy_clocks_for_destructive_link_verification(link->dc); 807 } 808 809 static void verify_link_capability_non_destructive(struct dc_link *link) 810 { 811 if (dc_is_dp_signal(link->local_sink->sink_signal)) { 812 if (dc_is_embedded_signal(link->local_sink->sink_signal) || 813 link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) 814 /* TODO - should we check link encoder's max link caps here? 815 * How do we know which link encoder to check from? 816 */ 817 link->verified_link_cap = link->reported_link_cap; 818 else 819 link->verified_link_cap = dp_get_max_link_cap(link); 820 } 821 } 822 823 static bool should_verify_link_capability_destructively(struct dc_link *link, 824 enum dc_detect_reason reason) 825 { 826 bool destrictive = false; 827 struct dc_link_settings max_link_cap; 828 bool is_link_enc_unavailable = false; 829 830 if (!link->dc->config.unify_link_enc_assignment) 831 is_link_enc_unavailable = link->link_enc && 832 link->dc->res_pool->funcs->link_encs_assign && 833 !link_enc_cfg_is_link_enc_avail( 834 link->ctx->dc, 835 link->link_enc->preferred_engine, 836 link); 837 838 if (dc_is_dp_signal(link->local_sink->sink_signal)) { 839 max_link_cap = dp_get_max_link_cap(link); 840 destrictive = true; 841 842 if (link->dc->debug.skip_detection_link_training || 843 dc_is_embedded_signal(link->local_sink->sink_signal) || 844 (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && 845 !link->dc->config.enable_dpia_pre_training)) { 846 destrictive = false; 847 } else if (link_dp_get_encoding_format(&max_link_cap) == 848 DP_8b_10b_ENCODING) { 849 if (link->dpcd_caps.is_mst_capable || 850 is_link_enc_unavailable) { 851 destrictive = false; 852 } 853 } 854 } 855 856 return destrictive; 857 } 858 859 static void verify_link_capability(struct dc_link *link, struct dc_sink *sink, 860 enum dc_detect_reason reason) 861 { 862 if (should_verify_link_capability_destructively(link, reason)) 863 verify_link_capability_destructive(link, sink, reason); 864 else 865 verify_link_capability_non_destructive(link); 866 } 867 868 /** 869 * link_detect_evaluate_edid_header() - Evaluate if an EDID header is acceptable. 870 * 871 * Evaluates an 8-byte EDID header to check if it's good enough 872 * for the purpose of determining whether a display is connected 873 * without reading the full EDID. 874 * 875 * @edid_header: The first 8 bytes of the EDID read from DDC. 876 * 877 * Return: true if the header looks valid (>= 6 of 8 bytes match the 878 * expected 00/FF pattern), false otherwise. 879 */ 880 static bool link_detect_evaluate_edid_header(uint8_t edid_header[8]) 881 { 882 int edid_header_score = 0; 883 int i; 884 885 for (i = 0; i < 8; ++i) 886 edid_header_score += edid_header[i] == ((i == 0 || i == 7) ? 0x00 : 0xff); 887 888 return edid_header_score >= 6; 889 } 890 891 /** 892 * link_detect_ddc_probe() - Probe the DDC to see if a display is connected. 893 * 894 * Detect whether a display is connected to DDC without reading full EDID. 895 * Reads only the EDID header (the first 8 bytes of EDID) from DDC and 896 * evaluates whether that matches. 897 * 898 * @link: DC link whose DDC/I2C is probed for the EDID header. 899 * 900 * Return: true if the EDID header was read and passes validation, 901 * false otherwise. 902 */ 903 static bool link_detect_ddc_probe(struct dc_link *link) 904 { 905 enum signal_type signal = link_detect_sink_signal_type(link, DETECT_REASON_HPD); 906 enum ddc_transaction_type transaction_type = get_ddc_transaction_type(signal); 907 uint8_t edid_header[8] = {0}; 908 uint8_t zero = 0; 909 bool ddc_probed; 910 911 if (!link->ddc) 912 return false; 913 914 if (link->dc->hwss.prepare_ddc) 915 link->dc->hwss.prepare_ddc(link); 916 917 set_ddc_transaction_type(link->ddc, transaction_type); 918 919 ddc_probed = link_query_ddc_data(link->ddc, 0x50, &zero, 1, edid_header, sizeof(edid_header)); 920 921 if (!ddc_probed) 922 return false; 923 924 if (!link_detect_evaluate_edid_header(edid_header)) 925 return false; 926 927 return true; 928 } 929 930 /** 931 * link_detect_dac_load_detect() - Performs DAC load detection. 932 * 933 * Load detection can be used to detect the presence of an 934 * analog display when we can't read DDC. This causes a visible 935 * visual glitch so it should be used sparingly. 936 * 937 * @link: DC link to test using the DAC load-detect path. 938 * 939 * Return: true if the VBIOS load-detect call reports OK, false 940 * otherwise. 941 */ 942 static bool link_detect_dac_load_detect(struct dc_link *link) 943 { 944 if (!link->dc->hwss.dac_load_detect) 945 return false; 946 947 return link->dc->hwss.dac_load_detect(link); 948 } 949 950 /* 951 * detect_link_and_local_sink() - Detect if a sink is attached to a given link 952 * 953 * link->local_sink is created or destroyed as needed. 954 * 955 * This does not create remote sinks. 956 */ 957 static bool detect_link_and_local_sink(struct dc_link *link, 958 enum dc_detect_reason reason) 959 { 960 struct dc_sink_init_data sink_init_data = { 0 }; 961 struct display_sink_capability sink_caps = { 0 }; 962 uint32_t i; 963 bool converter_disable_audio = false; 964 struct audio_support *aud_support = &link->dc->res_pool->audio_support; 965 bool same_edid = false; 966 enum dc_edid_status edid_status; 967 struct dc_context *dc_ctx = link->ctx; 968 struct dc *dc = dc_ctx->dc; 969 struct dc_sink *sink = NULL; 970 struct dc_sink *prev_sink = NULL; 971 struct dpcd_caps prev_dpcd_caps; 972 enum dc_connection_type new_connection_type = dc_connection_none; 973 const uint32_t post_oui_delay = 30; // 30ms 974 975 if (dc_is_virtual_signal(link->connector_signal)) 976 return false; 977 978 if (((link->connector_signal == SIGNAL_TYPE_LVDS || 979 link->connector_signal == SIGNAL_TYPE_EDP) && 980 (!link->dc->config.allow_edp_hotplug_detection)) && 981 link->local_sink) { 982 // need to re-write OUI and brightness in resume case 983 if (link->connector_signal == SIGNAL_TYPE_EDP && 984 (link->dpcd_sink_ext_caps.bits.oled == 1)) { 985 dpcd_set_source_specific_data(link); 986 msleep(post_oui_delay); 987 set_default_brightness_aux(link); 988 } 989 990 return true; 991 } 992 993 if (!link_detect_connection_type(link, &new_connection_type)) { 994 BREAK_TO_DEBUGGER(); 995 return false; 996 } 997 998 prev_sink = link->local_sink; 999 if (prev_sink) { 1000 dc_sink_retain(prev_sink); 1001 memcpy(&prev_dpcd_caps, &link->dpcd_caps, sizeof(struct dpcd_caps)); 1002 } 1003 1004 link_disconnect_sink(link); 1005 if (new_connection_type != dc_connection_none) { 1006 link->type = new_connection_type; 1007 link->link_state_valid = false; 1008 1009 /* From Disconnected-to-Connected. */ 1010 switch (link->connector_signal) { 1011 case SIGNAL_TYPE_HDMI_TYPE_A: { 1012 sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C; 1013 if (aud_support->hdmi_audio_native) 1014 sink_caps.signal = SIGNAL_TYPE_HDMI_TYPE_A; 1015 else 1016 sink_caps.signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 1017 break; 1018 } 1019 1020 case SIGNAL_TYPE_DVI_SINGLE_LINK: { 1021 sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C; 1022 sink_caps.signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 1023 break; 1024 } 1025 1026 case SIGNAL_TYPE_DVI_DUAL_LINK: { 1027 sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C; 1028 sink_caps.signal = SIGNAL_TYPE_DVI_DUAL_LINK; 1029 break; 1030 } 1031 1032 case SIGNAL_TYPE_RGB: { 1033 sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C; 1034 sink_caps.signal = SIGNAL_TYPE_RGB; 1035 break; 1036 } 1037 1038 case SIGNAL_TYPE_LVDS: { 1039 sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C; 1040 sink_caps.signal = SIGNAL_TYPE_LVDS; 1041 break; 1042 } 1043 1044 case SIGNAL_TYPE_EDP: { 1045 detect_edp_sink_caps(link); 1046 read_current_link_settings_on_detect(link); 1047 1048 /* Disable power sequence on MIPI panel + converter 1049 */ 1050 if (dc->config.enable_mipi_converter_optimization && 1051 dc_ctx->dce_version == DCN_VERSION_3_01 && 1052 link->dpcd_caps.sink_dev_id == DP_BRANCH_DEVICE_ID_0022B9 && 1053 memcmp(&link->dpcd_caps.branch_dev_name, DP_SINK_BRANCH_DEV_NAME_7580, 1054 sizeof(link->dpcd_caps.branch_dev_name)) == 0) { 1055 dc->config.edp_no_power_sequencing = true; 1056 1057 if (!link->dpcd_caps.set_power_state_capable_edp) 1058 link->wa_flags.dp_keep_receiver_powered = true; 1059 } 1060 1061 sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX; 1062 sink_caps.signal = SIGNAL_TYPE_EDP; 1063 break; 1064 } 1065 1066 case SIGNAL_TYPE_DISPLAY_PORT: { 1067 1068 /* wa HPD high coming too early*/ 1069 if (link->ep_type == DISPLAY_ENDPOINT_PHY && 1070 link->link_enc->features.flags.bits.DP_IS_USB_C == 1) { 1071 1072 /* if alt mode times out, return false */ 1073 if (!wait_for_entering_dp_alt_mode(link)) 1074 return false; 1075 } 1076 1077 if (!detect_dp(link, &sink_caps, reason)) { 1078 1079 if (prev_sink) 1080 dc_sink_release(prev_sink); 1081 return false; 1082 } 1083 1084 /* Active SST downstream branch device unplug*/ 1085 if (link->type == dc_connection_sst_branch && 1086 link->dpcd_caps.sink_count.bits.SINK_COUNT == 0) { 1087 if (prev_sink) 1088 /* Downstream unplug */ 1089 dc_sink_release(prev_sink); 1090 return true; 1091 } 1092 1093 /* disable audio for non DP to HDMI active sst converter */ 1094 if (link->type == dc_connection_sst_branch && 1095 is_dp_active_dongle(link) && 1096 (link->dpcd_caps.dongle_type != 1097 DISPLAY_DONGLE_DP_HDMI_CONVERTER)) 1098 converter_disable_audio = true; 1099 1100 /* limited link rate to HBR3 for DPIA until we implement USB4 V2 */ 1101 if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && 1102 link->reported_link_cap.link_rate > LINK_RATE_HIGH3) 1103 link->reported_link_cap.link_rate = LINK_RATE_HIGH3; 1104 1105 if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling 1106 && link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc 1107 && link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support) { 1108 if (link_dpia_enable_usb4_dp_bw_alloc_mode(link) == false) 1109 link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc = false; 1110 } 1111 break; 1112 } 1113 1114 default: 1115 DC_ERROR("Invalid connector type! signal:%d\n", 1116 link->connector_signal); 1117 if (prev_sink) 1118 dc_sink_release(prev_sink); 1119 return false; 1120 } /* switch() */ 1121 1122 if (link->dpcd_caps.sink_count.bits.SINK_COUNT) 1123 link->dpcd_sink_count = 1124 link->dpcd_caps.sink_count.bits.SINK_COUNT; 1125 else 1126 link->dpcd_sink_count = 1; 1127 1128 set_ddc_transaction_type(link->ddc, 1129 sink_caps.transaction_type); 1130 1131 link->aux_mode = 1132 link_is_in_aux_transaction_mode(link->ddc); 1133 1134 sink_init_data.link = link; 1135 sink_init_data.sink_signal = sink_caps.signal; 1136 1137 sink = dc_sink_create(&sink_init_data); 1138 if (!sink) { 1139 DC_ERROR("Failed to create sink!\n"); 1140 if (prev_sink) 1141 dc_sink_release(prev_sink); 1142 return false; 1143 } 1144 1145 sink->link->dongle_max_pix_clk = sink_caps.max_hdmi_pixel_clock; 1146 sink->converter_disable_audio = converter_disable_audio; 1147 1148 /* dc_sink_create returns a new reference */ 1149 link->local_sink = sink; 1150 1151 edid_status = dm_helpers_read_local_edid(link->ctx, 1152 link, sink); 1153 1154 switch (edid_status) { 1155 case EDID_BAD_CHECKSUM: 1156 DC_LOG_ERROR("EDID checksum invalid.\n"); 1157 break; 1158 case EDID_PARTIAL_VALID: 1159 DC_LOG_ERROR("Partial EDID valid, abandon invalid blocks.\n"); 1160 break; 1161 case EDID_NO_RESPONSE: 1162 /* Analog connectors without EDID: 1163 * - old monitor that actually doesn't have EDID 1164 * - cheap DVI-A cable or adapter that doesn't connect DDC 1165 */ 1166 if (dc_connector_supports_analog(link->link_id.id)) { 1167 /* If we didn't already detect a display using 1168 * DAC load detection, we know it isn't connected. 1169 */ 1170 if (link->type != dc_connection_analog_load) { 1171 if (prev_sink) 1172 dc_sink_release(prev_sink); 1173 link_disconnect_sink(link); 1174 return false; 1175 } 1176 1177 LINK_INFO("link=%d, analog display detected without EDID\n", 1178 link->link_index); 1179 1180 link->type = dc_connection_analog_load; 1181 sink->edid_caps.analog = true; 1182 break; 1183 } 1184 1185 DC_LOG_ERROR("No EDID read.\n"); 1186 1187 /* 1188 * Abort detection for non-DP connectors if we have 1189 * no EDID 1190 * 1191 * DP needs to report as connected if HDP is high 1192 * even if we have no EDID in order to go to 1193 * fail-safe mode 1194 */ 1195 if (dc_is_hdmi_signal(link->connector_signal) || 1196 dc_is_dvi_signal(link->connector_signal)) { 1197 if (prev_sink) 1198 dc_sink_release(prev_sink); 1199 1200 return false; 1201 } 1202 1203 if (link->type == dc_connection_sst_branch && 1204 link->dpcd_caps.dongle_type == 1205 DISPLAY_DONGLE_DP_VGA_CONVERTER && 1206 reason == DETECT_REASON_HPDRX) { 1207 /* Abort detection for DP-VGA adapters when EDID 1208 * can't be read and detection reason is VGA-side 1209 * hotplug 1210 */ 1211 if (prev_sink) 1212 dc_sink_release(prev_sink); 1213 link_disconnect_sink(link); 1214 1215 return true; 1216 } 1217 1218 break; 1219 default: 1220 break; 1221 } 1222 1223 // Check if edid is the same 1224 if ((prev_sink) && 1225 (edid_status == EDID_THE_SAME || edid_status == EDID_OK)) 1226 same_edid = is_same_edid(&prev_sink->dc_edid, 1227 &sink->dc_edid); 1228 1229 if (sink->edid_caps.panel_patch.skip_scdc_overwrite) 1230 link->ctx->dc->debug.hdmi20_disable = true; 1231 1232 if (sink->edid_caps.panel_patch.remove_sink_ext_caps) 1233 link->dpcd_sink_ext_caps.raw = 0; 1234 1235 if (dc_is_hdmi_signal(link->connector_signal)) 1236 read_scdc_caps(link->ddc, link->local_sink); 1237 1238 if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && 1239 sink_caps.transaction_type == 1240 DDC_TRANSACTION_TYPE_I2C_OVER_AUX) { 1241 /* 1242 * TODO debug why certain monitors don't like 1243 * two link trainings 1244 */ 1245 query_hdcp_capability(sink->sink_signal, link); 1246 } else { 1247 // If edid is the same, then discard new sink and revert back to original sink 1248 if (same_edid) { 1249 link_disconnect_remap(prev_sink, link); 1250 sink = prev_sink; 1251 prev_sink = NULL; 1252 } 1253 1254 if (!sink->edid_caps.analog) 1255 query_hdcp_capability(sink->sink_signal, link); 1256 } 1257 1258 /* DVI-I connector connected to analog display. */ 1259 if ((link->link_id.id == CONNECTOR_ID_DUAL_LINK_DVII || 1260 link->link_id.id == CONNECTOR_ID_SINGLE_LINK_DVII) && 1261 sink->edid_caps.analog) 1262 sink->sink_signal = SIGNAL_TYPE_RGB; 1263 1264 /* HDMI-DVI Dongle */ 1265 if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A && 1266 !sink->edid_caps.edid_hdmi) 1267 sink->sink_signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 1268 else if (dc_is_dvi_signal(sink->sink_signal) && 1269 dc_is_dvi_signal(link->connector_signal) && 1270 aud_support->hdmi_audio_native && 1271 sink->edid_caps.edid_hdmi) 1272 sink->sink_signal = SIGNAL_TYPE_HDMI_TYPE_A; 1273 1274 if (link->local_sink && dc_is_dp_signal(sink_caps.signal)) 1275 dp_trace_init(link); 1276 1277 /* Connectivity log: detection */ 1278 for (i = 0; i < sink->dc_edid.length / DC_EDID_BLOCK_SIZE; i++) { 1279 CONN_DATA_DETECT(link, 1280 &sink->dc_edid.raw_edid[i * DC_EDID_BLOCK_SIZE], 1281 DC_EDID_BLOCK_SIZE, 1282 "%s: [Block %d] ", sink->edid_caps.display_name, i); 1283 } 1284 1285 DC_LOG_DETECTION_EDID_PARSER("%s: " 1286 "manufacturer_id = %X, " 1287 "product_id = %X, " 1288 "serial_number = %X, " 1289 "manufacture_week = %d, " 1290 "manufacture_year = %d, " 1291 "display_name = %s, " 1292 "speaker_flag = %d, " 1293 "audio_mode_count = %d\n", 1294 __func__, 1295 sink->edid_caps.manufacturer_id, 1296 sink->edid_caps.product_id, 1297 sink->edid_caps.serial_number, 1298 sink->edid_caps.manufacture_week, 1299 sink->edid_caps.manufacture_year, 1300 sink->edid_caps.display_name, 1301 sink->edid_caps.speaker_flags, 1302 sink->edid_caps.audio_mode_count); 1303 1304 for (i = 0; i < sink->edid_caps.audio_mode_count; i++) { 1305 DC_LOG_DETECTION_EDID_PARSER("%s: mode number = %d, " 1306 "format_code = %d, " 1307 "channel_count = %d, " 1308 "sample_rate = %d, " 1309 "sample_size = %d\n", 1310 __func__, 1311 i, 1312 sink->edid_caps.audio_modes[i].format_code, 1313 sink->edid_caps.audio_modes[i].channel_count, 1314 sink->edid_caps.audio_modes[i].sample_rate, 1315 sink->edid_caps.audio_modes[i].sample_size); 1316 } 1317 1318 if (link->connector_signal == SIGNAL_TYPE_EDP) { 1319 // Init dc_panel_config by HW config 1320 if (dc_ctx->dc->res_pool->funcs->get_panel_config_defaults) 1321 dc_ctx->dc->res_pool->funcs->get_panel_config_defaults(&link->panel_config); 1322 // Pickup base DM settings 1323 dm_helpers_init_panel_settings(dc_ctx, &link->panel_config, sink); 1324 // Override dc_panel_config if system has specific settings 1325 dm_helpers_override_panel_settings(dc_ctx, link); 1326 1327 //sink only can use supported link rate table, we are foreced to enable it 1328 if (link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN) 1329 link->panel_config.ilr.optimize_edp_link_rate = true; 1330 link->reported_link_cap.link_rate = get_max_edp_link_rate(link); 1331 } 1332 1333 } else { 1334 /* From Connected-to-Disconnected. */ 1335 link->type = dc_connection_none; 1336 sink_caps.signal = SIGNAL_TYPE_NONE; 1337 memset(&link->hdcp_caps, 0, sizeof(struct hdcp_caps)); 1338 /* When we unplug a passive DP-HDMI dongle connection, dongle_max_pix_clk 1339 * is not cleared. If we emulate a DP signal on this connection, it thinks 1340 * the dongle is still there and limits the number of modes we can emulate. 1341 * Clear dongle_max_pix_clk on disconnect to fix this 1342 */ 1343 link->dongle_max_pix_clk = 0; 1344 1345 dc_link_clear_dprx_states(link); 1346 dp_trace_reset(link); 1347 } 1348 1349 LINK_INFO("link=%d, dc_sink_in=%p is now %s prev_sink=%p edid same=%d\n", 1350 link->link_index, sink, 1351 (sink_caps.signal == 1352 SIGNAL_TYPE_NONE ? "Disconnected" : "Connected"), 1353 prev_sink, same_edid); 1354 1355 if (prev_sink) 1356 dc_sink_release(prev_sink); 1357 1358 return true; 1359 } 1360 1361 /** 1362 * link_detect_connection_type_analog() - Determines if an analog sink is connected. 1363 * 1364 * @link: DC link to evaluate (must support analog signalling). 1365 * @type: Updated with the detected connection type: 1366 * dc_connection_single (analog via DDC), 1367 * dc_connection_analog_load (via load-detect), 1368 * or dc_connection_none. 1369 * 1370 * Return: true if detection completed. 1371 */ 1372 static bool link_detect_connection_type_analog(struct dc_link *link, enum dc_connection_type *type) 1373 { 1374 /* Don't care about connectors that don't support an analog signal. */ 1375 ASSERT(dc_connector_supports_analog(link->link_id.id)); 1376 1377 if (link_detect_ddc_probe(link)) { 1378 *type = dc_connection_single; 1379 return true; 1380 } 1381 1382 if (link_detect_dac_load_detect(link)) { 1383 *type = dc_connection_analog_load; 1384 return true; 1385 } 1386 1387 *type = dc_connection_none; 1388 return true; 1389 } 1390 1391 /* 1392 * link_detect_connection_type() - Determine if there is a sink connected 1393 * 1394 * @type: Returned connection type 1395 * Does not detect downstream devices, such as MST sinks 1396 * or display connected through active dongles 1397 */ 1398 bool link_detect_connection_type(struct dc_link *link, enum dc_connection_type *type) 1399 { 1400 if (link->connector_signal == SIGNAL_TYPE_LVDS) { 1401 *type = dc_connection_single; 1402 return true; 1403 } 1404 1405 /* Ignore the HPD pin (if any) for analog connectors. 1406 * Instead rely on DDC and DAC. 1407 * 1408 * - VGA connectors don't have any HPD at all. 1409 * - Some DVI-A cables don't connect the HPD pin. 1410 * - Some DVI-A cables pull up the HPD pin. 1411 * (So it's high even when no display is connected.) 1412 */ 1413 if (dc_connector_supports_analog(link->link_id.id)) 1414 return link_detect_connection_type_analog(link, type); 1415 1416 if (link->connector_signal == SIGNAL_TYPE_EDP) { 1417 /*in case it is not on*/ 1418 if (!link->dc->config.edp_no_power_sequencing) 1419 link->dc->hwss.edp_power_control(link, true); 1420 link->dc->hwss.edp_wait_for_hpd_ready(link, true); 1421 } 1422 1423 /* Link may not have physical HPD pin. */ 1424 if (link->ep_type != DISPLAY_ENDPOINT_PHY) { 1425 if (link->is_hpd_pending || !dpia_query_hpd_status(link)) 1426 *type = dc_connection_none; 1427 else 1428 *type = dc_connection_single; 1429 1430 return true; 1431 } 1432 1433 1434 if (link_get_hpd_state(link)) { 1435 *type = dc_connection_single; 1436 /* TODO: need to do the actual detection */ 1437 } else { 1438 *type = dc_connection_none; 1439 if (link->connector_signal == SIGNAL_TYPE_EDP) { 1440 /* eDP is not connected, power down it */ 1441 if (!link->dc->config.edp_no_power_sequencing) 1442 link->dc->hwss.edp_power_control(link, false); 1443 } 1444 } 1445 1446 return true; 1447 } 1448 1449 bool link_detect(struct dc_link *link, enum dc_detect_reason reason) 1450 { 1451 bool is_local_sink_detect_success; 1452 bool is_delegated_to_mst_top_mgr = false; 1453 enum dc_connection_type pre_link_type = link->type; 1454 1455 is_local_sink_detect_success = detect_link_and_local_sink(link, reason); 1456 1457 if (is_local_sink_detect_success && link->local_sink) 1458 verify_link_capability(link, link->local_sink, reason); 1459 1460 DC_LOG_DC("%s: link_index=%d is_local_sink_detect_success=%d pre_link_type=%d link_type=%d\n", __func__, 1461 link->link_index, is_local_sink_detect_success, pre_link_type, link->type); 1462 1463 if (is_local_sink_detect_success && link->local_sink && 1464 dc_is_dp_signal(link->local_sink->sink_signal) && 1465 link->dpcd_caps.is_mst_capable) 1466 is_delegated_to_mst_top_mgr = discover_dp_mst_topology(link, reason); 1467 1468 if (pre_link_type == dc_connection_mst_branch && 1469 link->type != dc_connection_mst_branch) 1470 is_delegated_to_mst_top_mgr = link_reset_cur_dp_mst_topology(link); 1471 1472 return is_local_sink_detect_success && !is_delegated_to_mst_top_mgr; 1473 } 1474 1475 void link_clear_dprx_states(struct dc_link *link) 1476 { 1477 memset(&link->dprx_states, 0, sizeof(link->dprx_states)); 1478 } 1479 1480 bool link_is_hdcp14(struct dc_link *link, enum signal_type signal) 1481 { 1482 bool ret = false; 1483 1484 switch (signal) { 1485 case SIGNAL_TYPE_DISPLAY_PORT: 1486 case SIGNAL_TYPE_DISPLAY_PORT_MST: 1487 ret = link->hdcp_caps.bcaps.bits.HDCP_CAPABLE; 1488 break; 1489 case SIGNAL_TYPE_DVI_SINGLE_LINK: 1490 case SIGNAL_TYPE_DVI_DUAL_LINK: 1491 case SIGNAL_TYPE_HDMI_TYPE_A: 1492 /* HDMI doesn't tell us its HDCP(1.4) capability, so assume to always be capable, 1493 * we can poll for bksv but some displays have an issue with this. Since its so rare 1494 * for a display to not be 1.4 capable, this assumtion is ok 1495 */ 1496 ret = true; 1497 break; 1498 default: 1499 break; 1500 } 1501 return ret; 1502 } 1503 1504 bool link_is_hdcp22(struct dc_link *link, enum signal_type signal) 1505 { 1506 bool ret = false; 1507 1508 switch (signal) { 1509 case SIGNAL_TYPE_DISPLAY_PORT: 1510 case SIGNAL_TYPE_DISPLAY_PORT_MST: 1511 ret = (link->hdcp_caps.bcaps.bits.HDCP_CAPABLE && 1512 link->hdcp_caps.rx_caps.fields.byte0.hdcp_capable && 1513 (link->hdcp_caps.rx_caps.fields.version == 0x2)) ? 1 : 0; 1514 break; 1515 case SIGNAL_TYPE_DVI_SINGLE_LINK: 1516 case SIGNAL_TYPE_DVI_DUAL_LINK: 1517 case SIGNAL_TYPE_HDMI_TYPE_A: 1518 ret = (link->hdcp_caps.rx_caps.fields.version == 0x4) ? 1:0; 1519 break; 1520 default: 1521 break; 1522 } 1523 1524 return ret; 1525 } 1526 1527 const struct dc_link_status *link_get_status(const struct dc_link *link) 1528 { 1529 return &link->link_status; 1530 } 1531 1532 1533 static bool link_add_remote_sink_helper(struct dc_link *dc_link, struct dc_sink *sink) 1534 { 1535 if (dc_link->sink_count >= MAX_SINKS_PER_LINK) { 1536 BREAK_TO_DEBUGGER(); 1537 return false; 1538 } 1539 1540 dc_sink_retain(sink); 1541 1542 dc_link->remote_sinks[dc_link->sink_count] = sink; 1543 dc_link->sink_count++; 1544 1545 return true; 1546 } 1547 1548 struct dc_sink *link_add_remote_sink( 1549 struct dc_link *link, 1550 const uint8_t *edid, 1551 int len, 1552 struct dc_sink_init_data *init_data) 1553 { 1554 struct dc_sink *dc_sink; 1555 enum dc_edid_status edid_status; 1556 1557 if (len > DC_MAX_EDID_BUFFER_SIZE) { 1558 dm_error("Max EDID buffer size breached!\n"); 1559 return NULL; 1560 } 1561 1562 if (!init_data) { 1563 BREAK_TO_DEBUGGER(); 1564 return NULL; 1565 } 1566 1567 if (!init_data->link) { 1568 BREAK_TO_DEBUGGER(); 1569 return NULL; 1570 } 1571 1572 dc_sink = dc_sink_create(init_data); 1573 1574 if (!dc_sink) 1575 return NULL; 1576 1577 memmove(dc_sink->dc_edid.raw_edid, edid, len); 1578 dc_sink->dc_edid.length = len; 1579 1580 if (!link_add_remote_sink_helper( 1581 link, 1582 dc_sink)) 1583 goto fail_add_sink; 1584 1585 edid_status = dm_helpers_parse_edid_caps( 1586 link, 1587 &dc_sink->dc_edid, 1588 &dc_sink->edid_caps); 1589 1590 /* 1591 * Treat device as no EDID device if EDID 1592 * parsing fails 1593 */ 1594 if (edid_status != EDID_OK && edid_status != EDID_PARTIAL_VALID) { 1595 dc_sink->dc_edid.length = 0; 1596 dm_error("Bad EDID, status%d!\n", edid_status); 1597 } 1598 1599 return dc_sink; 1600 1601 fail_add_sink: 1602 dc_sink_release(dc_sink); 1603 return NULL; 1604 } 1605 1606 void link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink) 1607 { 1608 int i; 1609 1610 if (!link->sink_count) { 1611 BREAK_TO_DEBUGGER(); 1612 return; 1613 } 1614 1615 for (i = 0; i < link->sink_count; i++) { 1616 if (link->remote_sinks[i] == sink) { 1617 dc_sink_release(sink); 1618 link->remote_sinks[i] = NULL; 1619 1620 /* shrink array to remove empty place */ 1621 while (i < link->sink_count - 1) { 1622 link->remote_sinks[i] = link->remote_sinks[i+1]; 1623 i++; 1624 } 1625 link->remote_sinks[i] = NULL; 1626 link->sink_count--; 1627 return; 1628 } 1629 } 1630 } 1631