1 /* 2 * Copyright 2023 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 owns the creation/destruction of link structure. 28 */ 29 #include "link_factory.h" 30 #include "link_detection.h" 31 #include "link_resource.h" 32 #include "link_validation.h" 33 #include "link_dpms.h" 34 #include "accessories/link_dp_cts.h" 35 #include "accessories/link_dp_trace.h" 36 #include "accessories/link_fpga.h" 37 #include "protocols/link_ddc.h" 38 #include "protocols/link_dp_capability.h" 39 #include "protocols/link_dp_dpia_bw.h" 40 #include "protocols/link_dp_dpia.h" 41 #include "protocols/link_dp_irq_handler.h" 42 #include "protocols/link_dp_phy.h" 43 #include "protocols/link_dp_training.h" 44 #include "protocols/link_edp_panel_control.h" 45 #include "protocols/link_hpd.h" 46 #include "gpio_service_interface.h" 47 #include "atomfirmware.h" 48 49 #define DC_LOGGER_INIT(logger) 50 51 #define LINK_INFO(...) \ 52 DC_LOG_HW_HOTPLUG( \ 53 __VA_ARGS__) 54 55 /* link factory owns the creation/destruction of link structures. */ 56 static void construct_link_service_factory(struct link_service *link_srv) 57 { 58 59 link_srv->create_link = link_create; 60 link_srv->destroy_link = link_destroy; 61 } 62 63 /* link_detection manages link detection states and receiver states by using 64 * various link protocols. It also provides helper functions to interpret 65 * certain capabilities or status based on the states it manages or retrieve 66 * them directly from connected receivers. 67 */ 68 static void construct_link_service_detection(struct link_service *link_srv) 69 { 70 link_srv->detect_link = link_detect; 71 link_srv->detect_connection_type = link_detect_connection_type; 72 link_srv->add_remote_sink = link_add_remote_sink; 73 link_srv->remove_remote_sink = link_remove_remote_sink; 74 link_srv->get_hpd_state = link_get_hpd_state; 75 link_srv->get_hpd_gpio = link_get_hpd_gpio; 76 link_srv->enable_hpd = link_enable_hpd; 77 link_srv->disable_hpd = link_disable_hpd; 78 link_srv->enable_hpd_filter = link_enable_hpd_filter; 79 link_srv->reset_cur_dp_mst_topology = link_reset_cur_dp_mst_topology; 80 link_srv->get_status = link_get_status; 81 link_srv->is_hdcp1x_supported = link_is_hdcp14; 82 link_srv->is_hdcp2x_supported = link_is_hdcp22; 83 link_srv->clear_dprx_states = link_clear_dprx_states; 84 } 85 86 /* link resource implements accessors to link resource. */ 87 static void construct_link_service_resource(struct link_service *link_srv) 88 { 89 link_srv->get_cur_res_map = link_get_cur_res_map; 90 link_srv->restore_res_map = link_restore_res_map; 91 link_srv->get_cur_link_res = link_get_cur_link_res; 92 } 93 94 /* link validation owns timing validation against various link limitations. (ex. 95 * link bandwidth, receiver capability or our hardware capability) It also 96 * provides helper functions exposing bandwidth formulas used in validation. 97 */ 98 static void construct_link_service_validation(struct link_service *link_srv) 99 { 100 link_srv->validate_mode_timing = link_validate_mode_timing; 101 link_srv->dp_link_bandwidth_kbps = dp_link_bandwidth_kbps; 102 link_srv->validate_dpia_bandwidth = link_validate_dpia_bandwidth; 103 } 104 105 /* link dpms owns the programming sequence of stream's dpms state associated 106 * with the link and link's enable/disable sequences as result of the stream's 107 * dpms state change. 108 */ 109 static void construct_link_service_dpms(struct link_service *link_srv) 110 { 111 link_srv->set_dpms_on = link_set_dpms_on; 112 link_srv->set_dpms_off = link_set_dpms_off; 113 link_srv->resume = link_resume; 114 link_srv->blank_all_dp_displays = link_blank_all_dp_displays; 115 link_srv->blank_all_edp_displays = link_blank_all_edp_displays; 116 link_srv->blank_dp_stream = link_blank_dp_stream; 117 link_srv->increase_mst_payload = link_increase_mst_payload; 118 link_srv->reduce_mst_payload = link_reduce_mst_payload; 119 link_srv->set_dsc_on_stream = link_set_dsc_on_stream; 120 link_srv->set_dsc_enable = link_set_dsc_enable; 121 link_srv->update_dsc_config = link_update_dsc_config; 122 } 123 124 /* link ddc implements generic display communication protocols such as i2c, aux 125 * and scdc. It should not contain any specific applications of these 126 * protocols such as display capability query, detection, or handshaking such as 127 * link training. 128 */ 129 static void construct_link_service_ddc(struct link_service *link_srv) 130 { 131 link_srv->create_ddc_service = link_create_ddc_service; 132 link_srv->destroy_ddc_service = link_destroy_ddc_service; 133 link_srv->query_ddc_data = link_query_ddc_data; 134 link_srv->aux_transfer_raw = link_aux_transfer_raw; 135 link_srv->configure_fixed_vs_pe_retimer = link_configure_fixed_vs_pe_retimer; 136 link_srv->aux_transfer_with_retries_no_mutex = 137 link_aux_transfer_with_retries_no_mutex; 138 link_srv->is_in_aux_transaction_mode = link_is_in_aux_transaction_mode; 139 link_srv->get_aux_defer_delay = link_get_aux_defer_delay; 140 } 141 142 /* link dp capability implements dp specific link capability retrieval sequence. 143 * It is responsible for retrieving, parsing, overriding, deciding capability 144 * obtained from dp link. Link capability consists of encoders, DPRXs, cables, 145 * retimers, usb and all other possible backend capabilities. 146 */ 147 static void construct_link_service_dp_capability(struct link_service *link_srv) 148 { 149 link_srv->dp_is_sink_present = dp_is_sink_present; 150 link_srv->dp_is_fec_supported = dp_is_fec_supported; 151 link_srv->dp_is_128b_132b_signal = dp_is_128b_132b_signal; 152 link_srv->dp_get_max_link_enc_cap = dp_get_max_link_enc_cap; 153 link_srv->dp_get_verified_link_cap = dp_get_verified_link_cap; 154 link_srv->dp_get_encoding_format = link_dp_get_encoding_format; 155 link_srv->dp_should_enable_fec = dp_should_enable_fec; 156 link_srv->dp_decide_link_settings = link_decide_link_settings; 157 link_srv->mst_decide_link_encoding_format = 158 mst_decide_link_encoding_format; 159 link_srv->edp_decide_link_settings = edp_decide_link_settings; 160 link_srv->bw_kbps_from_raw_frl_link_rate_data = 161 link_bw_kbps_from_raw_frl_link_rate_data; 162 link_srv->dp_overwrite_extended_receiver_cap = 163 dp_overwrite_extended_receiver_cap; 164 link_srv->dp_decide_lttpr_mode = dp_decide_lttpr_mode; 165 } 166 167 /* link dp phy/dpia implements basic dp phy/dpia functionality such as 168 * enable/disable output and set lane/drive settings. It is responsible for 169 * maintaining and update software state representing current phy/dpia status 170 * such as current link settings. 171 */ 172 static void construct_link_service_dp_phy_or_dpia(struct link_service *link_srv) 173 { 174 link_srv->dpia_handle_usb4_bandwidth_allocation_for_link = 175 dpia_handle_usb4_bandwidth_allocation_for_link; 176 link_srv->dpia_handle_bw_alloc_response = dpia_handle_bw_alloc_response; 177 link_srv->dp_set_drive_settings = dp_set_drive_settings; 178 link_srv->dpcd_write_rx_power_ctrl = dpcd_write_rx_power_ctrl; 179 } 180 181 /* link dp irq handler implements DP HPD short pulse handling sequence according 182 * to DP specifications 183 */ 184 static void construct_link_service_dp_irq_handler(struct link_service *link_srv) 185 { 186 link_srv->dp_parse_link_loss_status = dp_parse_link_loss_status; 187 link_srv->dp_should_allow_hpd_rx_irq = dp_should_allow_hpd_rx_irq; 188 link_srv->dp_handle_link_loss = dp_handle_link_loss; 189 link_srv->dp_read_hpd_rx_irq_data = dp_read_hpd_rx_irq_data; 190 link_srv->dp_handle_hpd_rx_irq = dp_handle_hpd_rx_irq; 191 } 192 193 /* link edp panel control implements retrieval and configuration of eDP panel 194 * features such as PSR and ABM and it also manages specs defined eDP panel 195 * power sequences. 196 */ 197 static void construct_link_service_edp_panel_control(struct link_service *link_srv) 198 { 199 link_srv->edp_panel_backlight_power_on = edp_panel_backlight_power_on; 200 link_srv->edp_get_backlight_level = edp_get_backlight_level; 201 link_srv->edp_get_backlight_level_nits = edp_get_backlight_level_nits; 202 link_srv->edp_set_backlight_level = edp_set_backlight_level; 203 link_srv->edp_set_backlight_level_nits = edp_set_backlight_level_nits; 204 link_srv->edp_get_target_backlight_pwm = edp_get_target_backlight_pwm; 205 link_srv->edp_get_psr_state = edp_get_psr_state; 206 link_srv->edp_set_psr_allow_active = edp_set_psr_allow_active; 207 link_srv->edp_setup_psr = edp_setup_psr; 208 link_srv->edp_set_sink_vtotal_in_psr_active = 209 edp_set_sink_vtotal_in_psr_active; 210 link_srv->edp_get_psr_residency = edp_get_psr_residency; 211 212 link_srv->edp_get_replay_state = edp_get_replay_state; 213 link_srv->edp_set_replay_allow_active = edp_set_replay_allow_active; 214 link_srv->edp_setup_replay = edp_setup_replay; 215 link_srv->edp_set_coasting_vtotal = edp_set_coasting_vtotal; 216 link_srv->edp_replay_residency = edp_replay_residency; 217 218 link_srv->edp_wait_for_t12 = edp_wait_for_t12; 219 link_srv->edp_is_ilr_optimization_required = 220 edp_is_ilr_optimization_required; 221 link_srv->edp_backlight_enable_aux = edp_backlight_enable_aux; 222 link_srv->edp_add_delay_for_T9 = edp_add_delay_for_T9; 223 link_srv->edp_receiver_ready_T9 = edp_receiver_ready_T9; 224 link_srv->edp_receiver_ready_T7 = edp_receiver_ready_T7; 225 link_srv->edp_power_alpm_dpcd_enable = edp_power_alpm_dpcd_enable; 226 link_srv->edp_set_panel_power = edp_set_panel_power; 227 } 228 229 /* link dp cts implements dp compliance test automation protocols and manual 230 * testing interfaces for debugging and certification purpose. 231 */ 232 static void construct_link_service_dp_cts(struct link_service *link_srv) 233 { 234 link_srv->dp_handle_automated_test = dp_handle_automated_test; 235 link_srv->dp_set_test_pattern = dp_set_test_pattern; 236 link_srv->dp_set_preferred_link_settings = 237 dp_set_preferred_link_settings; 238 link_srv->dp_set_preferred_training_settings = 239 dp_set_preferred_training_settings; 240 } 241 242 /* link dp trace implements tracing interfaces for tracking major dp sequences 243 * including execution status and timestamps 244 */ 245 static void construct_link_service_dp_trace(struct link_service *link_srv) 246 { 247 link_srv->dp_trace_is_initialized = dp_trace_is_initialized; 248 link_srv->dp_trace_set_is_logged_flag = dp_trace_set_is_logged_flag; 249 link_srv->dp_trace_is_logged = dp_trace_is_logged; 250 link_srv->dp_trace_get_lt_end_timestamp = dp_trace_get_lt_end_timestamp; 251 link_srv->dp_trace_get_lt_counts = dp_trace_get_lt_counts; 252 link_srv->dp_trace_get_link_loss_count = dp_trace_get_link_loss_count; 253 link_srv->dp_trace_set_edp_power_timestamp = 254 dp_trace_set_edp_power_timestamp; 255 link_srv->dp_trace_get_edp_poweron_timestamp = 256 dp_trace_get_edp_poweron_timestamp; 257 link_srv->dp_trace_get_edp_poweroff_timestamp = 258 dp_trace_get_edp_poweroff_timestamp; 259 link_srv->dp_trace_source_sequence = dp_trace_source_sequence; 260 } 261 262 static void construct_link_service(struct link_service *link_srv) 263 { 264 /* All link service functions should fall under some sub categories. 265 * If a new function doesn't perfectly fall under an existing sub 266 * category, it must be that you are either adding a whole new aspect of 267 * responsibility to link service or something doesn't belong to link 268 * service. In that case please contact the arch owner to arrange a 269 * design review meeting. 270 */ 271 construct_link_service_factory(link_srv); 272 construct_link_service_detection(link_srv); 273 construct_link_service_resource(link_srv); 274 construct_link_service_validation(link_srv); 275 construct_link_service_dpms(link_srv); 276 construct_link_service_ddc(link_srv); 277 construct_link_service_dp_capability(link_srv); 278 construct_link_service_dp_phy_or_dpia(link_srv); 279 construct_link_service_dp_irq_handler(link_srv); 280 construct_link_service_edp_panel_control(link_srv); 281 construct_link_service_dp_cts(link_srv); 282 construct_link_service_dp_trace(link_srv); 283 } 284 285 struct link_service *link_create_link_service(void) 286 { 287 struct link_service *link_srv = kzalloc(sizeof(*link_srv), GFP_KERNEL); 288 289 if (link_srv == NULL) 290 goto fail; 291 292 construct_link_service(link_srv); 293 294 return link_srv; 295 fail: 296 return NULL; 297 } 298 299 void link_destroy_link_service(struct link_service **link_srv) 300 { 301 kfree(*link_srv); 302 *link_srv = NULL; 303 } 304 305 static enum transmitter translate_encoder_to_transmitter( 306 struct graphics_object_id encoder) 307 { 308 switch (encoder.id) { 309 case ENCODER_ID_INTERNAL_UNIPHY: 310 switch (encoder.enum_id) { 311 case ENUM_ID_1: 312 return TRANSMITTER_UNIPHY_A; 313 case ENUM_ID_2: 314 return TRANSMITTER_UNIPHY_B; 315 default: 316 return TRANSMITTER_UNKNOWN; 317 } 318 break; 319 case ENCODER_ID_INTERNAL_UNIPHY1: 320 switch (encoder.enum_id) { 321 case ENUM_ID_1: 322 return TRANSMITTER_UNIPHY_C; 323 case ENUM_ID_2: 324 return TRANSMITTER_UNIPHY_D; 325 default: 326 return TRANSMITTER_UNKNOWN; 327 } 328 break; 329 case ENCODER_ID_INTERNAL_UNIPHY2: 330 switch (encoder.enum_id) { 331 case ENUM_ID_1: 332 return TRANSMITTER_UNIPHY_E; 333 case ENUM_ID_2: 334 return TRANSMITTER_UNIPHY_F; 335 default: 336 return TRANSMITTER_UNKNOWN; 337 } 338 break; 339 case ENCODER_ID_INTERNAL_UNIPHY3: 340 switch (encoder.enum_id) { 341 case ENUM_ID_1: 342 return TRANSMITTER_UNIPHY_G; 343 default: 344 return TRANSMITTER_UNKNOWN; 345 } 346 break; 347 case ENCODER_ID_EXTERNAL_NUTMEG: 348 switch (encoder.enum_id) { 349 case ENUM_ID_1: 350 return TRANSMITTER_NUTMEG_CRT; 351 default: 352 return TRANSMITTER_UNKNOWN; 353 } 354 break; 355 case ENCODER_ID_EXTERNAL_TRAVIS: 356 switch (encoder.enum_id) { 357 case ENUM_ID_1: 358 return TRANSMITTER_TRAVIS_CRT; 359 case ENUM_ID_2: 360 return TRANSMITTER_TRAVIS_LCD; 361 default: 362 return TRANSMITTER_UNKNOWN; 363 } 364 break; 365 default: 366 return TRANSMITTER_UNKNOWN; 367 } 368 } 369 370 static void link_destruct(struct dc_link *link) 371 { 372 int i; 373 374 if (link->hpd_gpio) { 375 dal_gpio_destroy_irq(&link->hpd_gpio); 376 link->hpd_gpio = NULL; 377 } 378 379 if (link->ddc) 380 link_destroy_ddc_service(&link->ddc); 381 382 if (link->panel_cntl) 383 link->panel_cntl->funcs->destroy(&link->panel_cntl); 384 385 if (link->link_enc) { 386 /* Update link encoder resource tracking variables. These are used for 387 * the dynamic assignment of link encoders to streams. Virtual links 388 * are not assigned encoder resources on creation. 389 */ 390 if (link->link_id.id != CONNECTOR_ID_VIRTUAL) { 391 link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL; 392 link->dc->res_pool->dig_link_enc_count--; 393 } 394 link->link_enc->funcs->destroy(&link->link_enc); 395 } 396 397 if (link->local_sink) 398 dc_sink_release(link->local_sink); 399 400 for (i = 0; i < link->sink_count; ++i) 401 dc_sink_release(link->remote_sinks[i]); 402 } 403 404 static enum channel_id get_ddc_line(struct dc_link *link) 405 { 406 struct ddc *ddc; 407 enum channel_id channel; 408 409 channel = CHANNEL_ID_UNKNOWN; 410 411 ddc = get_ddc_pin(link->ddc); 412 413 if (ddc) { 414 switch (dal_ddc_get_line(ddc)) { 415 case GPIO_DDC_LINE_DDC1: 416 channel = CHANNEL_ID_DDC1; 417 break; 418 case GPIO_DDC_LINE_DDC2: 419 channel = CHANNEL_ID_DDC2; 420 break; 421 case GPIO_DDC_LINE_DDC3: 422 channel = CHANNEL_ID_DDC3; 423 break; 424 case GPIO_DDC_LINE_DDC4: 425 channel = CHANNEL_ID_DDC4; 426 break; 427 case GPIO_DDC_LINE_DDC5: 428 channel = CHANNEL_ID_DDC5; 429 break; 430 case GPIO_DDC_LINE_DDC6: 431 channel = CHANNEL_ID_DDC6; 432 break; 433 case GPIO_DDC_LINE_DDC_VGA: 434 channel = CHANNEL_ID_DDC_VGA; 435 break; 436 case GPIO_DDC_LINE_I2C_PAD: 437 channel = CHANNEL_ID_I2C_PAD; 438 break; 439 default: 440 BREAK_TO_DEBUGGER(); 441 break; 442 } 443 } 444 445 return channel; 446 } 447 448 static bool construct_phy(struct dc_link *link, 449 const struct link_init_data *init_params) 450 { 451 uint8_t i; 452 struct ddc_service_init_data ddc_service_init_data = { 0 }; 453 struct dc_context *dc_ctx = init_params->ctx; 454 struct encoder_init_data enc_init_data = { 0 }; 455 struct panel_cntl_init_data panel_cntl_init_data = { 0 }; 456 struct integrated_info info = { 0 }; 457 struct dc_bios *bios = init_params->dc->ctx->dc_bios; 458 const struct dc_vbios_funcs *bp_funcs = bios->funcs; 459 struct bp_disp_connector_caps_info disp_connect_caps_info = { 0 }; 460 461 DC_LOGGER_INIT(dc_ctx->logger); 462 463 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 464 link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID; 465 link->link_status.dpcd_caps = &link->dpcd_caps; 466 467 link->dc = init_params->dc; 468 link->ctx = dc_ctx; 469 link->link_index = init_params->link_index; 470 471 memset(&link->preferred_training_settings, 0, 472 sizeof(struct dc_link_training_overrides)); 473 memset(&link->preferred_link_setting, 0, 474 sizeof(struct dc_link_settings)); 475 476 link->link_id = 477 bios->funcs->get_connector_id(bios, init_params->connector_index); 478 479 link->ep_type = DISPLAY_ENDPOINT_PHY; 480 481 DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id); 482 483 if (bios->funcs->get_disp_connector_caps_info) { 484 bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info); 485 link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY; 486 DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display); 487 } 488 489 if (link->link_id.type != OBJECT_TYPE_CONNECTOR) { 490 dm_output_to_console("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n", 491 __func__, init_params->connector_index, 492 link->link_id.type, OBJECT_TYPE_CONNECTOR); 493 goto create_fail; 494 } 495 496 if (link->dc->res_pool->funcs->link_init) 497 link->dc->res_pool->funcs->link_init(link); 498 499 link->hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id, 500 link->ctx->gpio_service); 501 502 if (link->hpd_gpio) { 503 dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT); 504 dal_gpio_unlock_pin(link->hpd_gpio); 505 link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio); 506 507 DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id); 508 DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en); 509 } 510 511 switch (link->link_id.id) { 512 case CONNECTOR_ID_HDMI_TYPE_A: 513 link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A; 514 515 break; 516 case CONNECTOR_ID_SINGLE_LINK_DVID: 517 case CONNECTOR_ID_SINGLE_LINK_DVII: 518 link->connector_signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 519 break; 520 case CONNECTOR_ID_DUAL_LINK_DVID: 521 case CONNECTOR_ID_DUAL_LINK_DVII: 522 link->connector_signal = SIGNAL_TYPE_DVI_DUAL_LINK; 523 break; 524 case CONNECTOR_ID_DISPLAY_PORT: 525 case CONNECTOR_ID_USBC: 526 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT; 527 528 if (link->hpd_gpio) 529 link->irq_source_hpd_rx = 530 dal_irq_get_rx_source(link->hpd_gpio); 531 532 break; 533 case CONNECTOR_ID_EDP: 534 link->connector_signal = SIGNAL_TYPE_EDP; 535 536 if (link->hpd_gpio) { 537 if (!link->dc->config.allow_edp_hotplug_detection) 538 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 539 540 switch (link->dc->config.allow_edp_hotplug_detection) { 541 case HPD_EN_FOR_ALL_EDP: 542 link->irq_source_hpd_rx = 543 dal_irq_get_rx_source(link->hpd_gpio); 544 break; 545 case HPD_EN_FOR_PRIMARY_EDP_ONLY: 546 if (link->link_index == 0) 547 link->irq_source_hpd_rx = 548 dal_irq_get_rx_source(link->hpd_gpio); 549 else 550 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 551 break; 552 case HPD_EN_FOR_SECONDARY_EDP_ONLY: 553 if (link->link_index == 1) 554 link->irq_source_hpd_rx = 555 dal_irq_get_rx_source(link->hpd_gpio); 556 else 557 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 558 break; 559 default: 560 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 561 break; 562 } 563 } 564 565 break; 566 case CONNECTOR_ID_LVDS: 567 link->connector_signal = SIGNAL_TYPE_LVDS; 568 break; 569 default: 570 DC_LOG_WARNING("Unsupported Connector type:%d!\n", 571 link->link_id.id); 572 goto create_fail; 573 } 574 575 LINK_INFO("Connector[%d] description: signal: %s\n", 576 init_params->connector_index, 577 signal_type_to_string(link->connector_signal)); 578 579 ddc_service_init_data.ctx = link->ctx; 580 ddc_service_init_data.id = link->link_id; 581 ddc_service_init_data.link = link; 582 link->ddc = link_create_ddc_service(&ddc_service_init_data); 583 584 if (!link->ddc) { 585 DC_ERROR("Failed to create ddc_service!\n"); 586 goto ddc_create_fail; 587 } 588 589 if (!link->ddc->ddc_pin) { 590 DC_ERROR("Failed to get I2C info for connector!\n"); 591 goto ddc_create_fail; 592 } 593 594 link->ddc_hw_inst = 595 dal_ddc_get_line(get_ddc_pin(link->ddc)); 596 597 598 if (link->dc->res_pool->funcs->panel_cntl_create && 599 (link->link_id.id == CONNECTOR_ID_EDP || 600 link->link_id.id == CONNECTOR_ID_LVDS)) { 601 panel_cntl_init_data.ctx = dc_ctx; 602 panel_cntl_init_data.inst = 603 panel_cntl_init_data.ctx->dc_edp_id_count; 604 link->panel_cntl = 605 link->dc->res_pool->funcs->panel_cntl_create( 606 &panel_cntl_init_data); 607 panel_cntl_init_data.ctx->dc_edp_id_count++; 608 609 if (link->panel_cntl == NULL) { 610 DC_ERROR("Failed to create link panel_cntl!\n"); 611 goto panel_cntl_create_fail; 612 } 613 } 614 615 enc_init_data.ctx = dc_ctx; 616 bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0, 617 &enc_init_data.encoder); 618 enc_init_data.connector = link->link_id; 619 enc_init_data.channel = get_ddc_line(link); 620 enc_init_data.hpd_source = get_hpd_line(link); 621 622 link->hpd_src = enc_init_data.hpd_source; 623 624 enc_init_data.transmitter = 625 translate_encoder_to_transmitter(enc_init_data.encoder); 626 link->link_enc = 627 link->dc->res_pool->funcs->link_enc_create(dc_ctx, &enc_init_data); 628 629 DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C); 630 DC_LOG_DC("BIOS object table - IS_DP2_CAPABLE: %d", link->link_enc->features.flags.bits.IS_DP2_CAPABLE); 631 632 if (!link->link_enc) { 633 DC_ERROR("Failed to create link encoder!\n"); 634 goto link_enc_create_fail; 635 } 636 637 /* Update link encoder tracking variables. These are used for the dynamic 638 * assignment of link encoders to streams. 639 */ 640 link->eng_id = link->link_enc->preferred_engine; 641 link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc; 642 link->dc->res_pool->dig_link_enc_count++; 643 644 link->link_enc_hw_inst = link->link_enc->transmitter; 645 for (i = 0; i < 4; i++) { 646 if (bp_funcs->get_device_tag(dc_ctx->dc_bios, 647 link->link_id, i, 648 &link->device_tag) != BP_RESULT_OK) { 649 DC_ERROR("Failed to find device tag!\n"); 650 goto device_tag_fail; 651 } 652 653 /* Look for device tag that matches connector signal, 654 * CRT for rgb, LCD for other supported signal tyes 655 */ 656 if (!bp_funcs->is_device_id_supported(dc_ctx->dc_bios, 657 link->device_tag.dev_id)) 658 continue; 659 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_CRT && 660 link->connector_signal != SIGNAL_TYPE_RGB) 661 continue; 662 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD && 663 link->connector_signal == SIGNAL_TYPE_RGB) 664 continue; 665 666 DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device); 667 DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type); 668 DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id); 669 break; 670 } 671 672 if (bios->integrated_info) 673 info = *bios->integrated_info; 674 675 /* Look for channel mapping corresponding to connector and device tag */ 676 for (i = 0; i < MAX_NUMBER_OF_EXT_DISPLAY_PATH; i++) { 677 struct external_display_path *path = 678 &info.ext_disp_conn_info.path[i]; 679 680 if (path->device_connector_id.enum_id == link->link_id.enum_id && 681 path->device_connector_id.id == link->link_id.id && 682 path->device_connector_id.type == link->link_id.type) { 683 if (link->device_tag.acpi_device != 0 && 684 path->device_acpi_enum == link->device_tag.acpi_device) { 685 link->ddi_channel_mapping = path->channel_mapping; 686 link->chip_caps = path->caps; 687 DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw); 688 DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps); 689 } else if (path->device_tag == 690 link->device_tag.dev_id.raw_device_tag) { 691 link->ddi_channel_mapping = path->channel_mapping; 692 link->chip_caps = path->caps; 693 DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw); 694 DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps); 695 } 696 697 if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) { 698 link->bios_forced_drive_settings.VOLTAGE_SWING = 699 (info.ext_disp_conn_info.fixdpvoltageswing & 0x3); 700 link->bios_forced_drive_settings.PRE_EMPHASIS = 701 ((info.ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3); 702 } 703 704 break; 705 } 706 } 707 708 if (bios->funcs->get_atom_dc_golden_table) 709 bios->funcs->get_atom_dc_golden_table(bios); 710 711 /* 712 * TODO check if GPIO programmed correctly 713 * 714 * If GPIO isn't programmed correctly HPD might not rise or drain 715 * fast enough, leading to bounces. 716 */ 717 program_hpd_filter(link); 718 719 link->psr_settings.psr_vtotal_control_support = false; 720 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED; 721 722 DC_LOG_DC("BIOS object table - %s finished successfully.\n", __func__); 723 return true; 724 device_tag_fail: 725 link->link_enc->funcs->destroy(&link->link_enc); 726 link_enc_create_fail: 727 if (link->panel_cntl != NULL) 728 link->panel_cntl->funcs->destroy(&link->panel_cntl); 729 panel_cntl_create_fail: 730 link_destroy_ddc_service(&link->ddc); 731 ddc_create_fail: 732 create_fail: 733 734 if (link->hpd_gpio) { 735 dal_gpio_destroy_irq(&link->hpd_gpio); 736 link->hpd_gpio = NULL; 737 } 738 739 DC_LOG_DC("BIOS object table - %s failed.\n", __func__); 740 return false; 741 } 742 743 static bool construct_dpia(struct dc_link *link, 744 const struct link_init_data *init_params) 745 { 746 struct ddc_service_init_data ddc_service_init_data = { 0 }; 747 struct dc_context *dc_ctx = init_params->ctx; 748 749 DC_LOGGER_INIT(dc_ctx->logger); 750 751 /* Initialized irq source for hpd and hpd rx */ 752 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 753 link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID; 754 link->link_status.dpcd_caps = &link->dpcd_caps; 755 756 link->dc = init_params->dc; 757 link->ctx = dc_ctx; 758 link->link_index = init_params->link_index; 759 760 memset(&link->preferred_training_settings, 0, 761 sizeof(struct dc_link_training_overrides)); 762 memset(&link->preferred_link_setting, 0, 763 sizeof(struct dc_link_settings)); 764 765 /* Dummy Init for linkid */ 766 link->link_id.type = OBJECT_TYPE_CONNECTOR; 767 link->link_id.id = CONNECTOR_ID_DISPLAY_PORT; 768 link->link_id.enum_id = ENUM_ID_1 + init_params->connector_index; 769 link->is_internal_display = false; 770 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT; 771 LINK_INFO("Connector[%d] description:signal %d\n", 772 init_params->connector_index, 773 link->connector_signal); 774 775 link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA; 776 link->is_dig_mapping_flexible = true; 777 778 /* TODO: Initialize link : funcs->link_init */ 779 780 ddc_service_init_data.ctx = link->ctx; 781 ddc_service_init_data.id = link->link_id; 782 ddc_service_init_data.link = link; 783 /* Set indicator for dpia link so that ddc wont be created */ 784 ddc_service_init_data.is_dpia_link = true; 785 786 link->ddc = link_create_ddc_service(&ddc_service_init_data); 787 if (!link->ddc) { 788 DC_ERROR("Failed to create ddc_service!\n"); 789 goto ddc_create_fail; 790 } 791 792 /* Set dpia port index : 0 to number of dpia ports */ 793 link->ddc_hw_inst = init_params->connector_index; 794 795 // Assign Dpia preferred eng_id 796 if (link->dc->res_pool->funcs->get_preferred_eng_id_dpia) 797 link->dpia_preferred_eng_id = link->dc->res_pool->funcs->get_preferred_eng_id_dpia(link->ddc_hw_inst); 798 799 /* TODO: Create link encoder */ 800 801 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED; 802 803 /* Some docks seem to NAK I2C writes to segment pointer with mot=0. */ 804 link->wa_flags.dp_mot_reset_segment = true; 805 806 return true; 807 808 ddc_create_fail: 809 return false; 810 } 811 812 static bool link_construct(struct dc_link *link, 813 const struct link_init_data *init_params) 814 { 815 /* Handle dpia case */ 816 if (init_params->is_dpia_link == true) 817 return construct_dpia(link, init_params); 818 else 819 return construct_phy(link, init_params); 820 } 821 822 struct dc_link *link_create(const struct link_init_data *init_params) 823 { 824 struct dc_link *link = 825 kzalloc(sizeof(*link), GFP_KERNEL); 826 827 if (NULL == link) 828 goto alloc_fail; 829 830 if (false == link_construct(link, init_params)) 831 goto construct_fail; 832 833 return link; 834 835 construct_fail: 836 kfree(link); 837 838 alloc_fail: 839 return NULL; 840 } 841 842 void link_destroy(struct dc_link **link) 843 { 844 link_destruct(*link); 845 kfree(*link); 846 *link = NULL; 847 } 848