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 "protocols/link_ddc.h" 37 #include "protocols/link_dp_capability.h" 38 #include "protocols/link_dp_dpia_bw.h" 39 #include "protocols/link_dp_dpia.h" 40 #include "protocols/link_dp_irq_handler.h" 41 #include "protocols/link_dp_phy.h" 42 #include "protocols/link_dp_training.h" 43 #include "protocols/link_edp_panel_control.h" 44 #include "protocols/link_hpd.h" 45 #include "gpio_service_interface.h" 46 #include "atomfirmware.h" 47 48 #define DC_LOGGER \ 49 dc_ctx->logger 50 #define DC_LOGGER_INIT(logger) 51 52 #define LINK_INFO(...) \ 53 DC_LOG_HW_HOTPLUG( \ 54 __VA_ARGS__) 55 56 /* link factory owns the creation/destruction of link structures. */ 57 static void construct_link_service_factory(struct link_service *link_srv) 58 { 59 60 link_srv->create_link = link_create; 61 link_srv->destroy_link = link_destroy; 62 } 63 64 /* link_detection manages link detection states and receiver states by using 65 * various link protocols. It also provides helper functions to interpret 66 * certain capabilities or status based on the states it manages or retrieve 67 * them directly from connected receivers. 68 */ 69 static void construct_link_service_detection(struct link_service *link_srv) 70 { 71 link_srv->detect_link = link_detect; 72 link_srv->detect_connection_type = link_detect_connection_type; 73 link_srv->add_remote_sink = link_add_remote_sink; 74 link_srv->remove_remote_sink = link_remove_remote_sink; 75 link_srv->get_hpd_state = link_get_hpd_state; 76 link_srv->get_hpd_gpio = link_get_hpd_gpio; 77 link_srv->enable_hpd = link_enable_hpd; 78 link_srv->disable_hpd = link_disable_hpd; 79 link_srv->enable_hpd_filter = link_enable_hpd_filter; 80 link_srv->reset_cur_dp_mst_topology = link_reset_cur_dp_mst_topology; 81 link_srv->get_status = link_get_status; 82 link_srv->is_hdcp1x_supported = link_is_hdcp14; 83 link_srv->is_hdcp2x_supported = link_is_hdcp22; 84 link_srv->clear_dprx_states = link_clear_dprx_states; 85 } 86 87 /* link resource implements accessors to link resource. */ 88 static void construct_link_service_resource(struct link_service *link_srv) 89 { 90 link_srv->get_cur_res_map = link_get_cur_res_map; 91 link_srv->restore_res_map = link_restore_res_map; 92 link_srv->get_cur_link_res = link_get_cur_link_res; 93 } 94 95 /* link validation owns timing validation against various link limitations. (ex. 96 * link bandwidth, receiver capability or our hardware capability) It also 97 * provides helper functions exposing bandwidth formulas used in validation. 98 */ 99 static void construct_link_service_validation(struct link_service *link_srv) 100 { 101 link_srv->validate_mode_timing = link_validate_mode_timing; 102 link_srv->dp_link_bandwidth_kbps = dp_link_bandwidth_kbps; 103 link_srv->validate_dpia_bandwidth = link_validate_dpia_bandwidth; 104 link_srv->dp_required_hblank_size_bytes = dp_required_hblank_size_bytes; 105 } 106 107 /* link dpms owns the programming sequence of stream's dpms state associated 108 * with the link and link's enable/disable sequences as result of the stream's 109 * dpms state change. 110 */ 111 static void construct_link_service_dpms(struct link_service *link_srv) 112 { 113 link_srv->set_dpms_on = link_set_dpms_on; 114 link_srv->set_dpms_off = link_set_dpms_off; 115 link_srv->resume = link_resume; 116 link_srv->blank_all_dp_displays = link_blank_all_dp_displays; 117 link_srv->blank_all_edp_displays = link_blank_all_edp_displays; 118 link_srv->blank_dp_stream = link_blank_dp_stream; 119 link_srv->increase_mst_payload = link_increase_mst_payload; 120 link_srv->reduce_mst_payload = link_reduce_mst_payload; 121 link_srv->set_dsc_on_stream = link_set_dsc_on_stream; 122 link_srv->set_dsc_enable = link_set_dsc_enable; 123 link_srv->update_dsc_config = link_update_dsc_config; 124 } 125 126 /* link ddc implements generic display communication protocols such as i2c, aux 127 * and scdc. It should not contain any specific applications of these 128 * protocols such as display capability query, detection, or handshaking such as 129 * link training. 130 */ 131 static void construct_link_service_ddc(struct link_service *link_srv) 132 { 133 link_srv->create_ddc_service = link_create_ddc_service; 134 link_srv->destroy_ddc_service = link_destroy_ddc_service; 135 link_srv->query_ddc_data = link_query_ddc_data; 136 link_srv->aux_transfer_raw = link_aux_transfer_raw; 137 link_srv->configure_fixed_vs_pe_retimer = link_configure_fixed_vs_pe_retimer; 138 link_srv->aux_transfer_with_retries_no_mutex = 139 link_aux_transfer_with_retries_no_mutex; 140 link_srv->is_in_aux_transaction_mode = link_is_in_aux_transaction_mode; 141 link_srv->get_aux_defer_delay = link_get_aux_defer_delay; 142 } 143 144 /* link dp capability implements dp specific link capability retrieval sequence. 145 * It is responsible for retrieving, parsing, overriding, deciding capability 146 * obtained from dp link. Link capability consists of encoders, DPRXs, cables, 147 * retimers, usb and all other possible backend capabilities. 148 */ 149 static void construct_link_service_dp_capability(struct link_service *link_srv) 150 { 151 link_srv->dp_is_sink_present = dp_is_sink_present; 152 link_srv->dp_is_fec_supported = dp_is_fec_supported; 153 link_srv->dp_is_128b_132b_signal = dp_is_128b_132b_signal; 154 link_srv->dp_get_max_link_enc_cap = dp_get_max_link_enc_cap; 155 link_srv->dp_get_verified_link_cap = dp_get_verified_link_cap; 156 link_srv->dp_get_encoding_format = link_dp_get_encoding_format; 157 link_srv->dp_should_enable_fec = dp_should_enable_fec; 158 link_srv->dp_decide_link_settings = link_decide_link_settings; 159 link_srv->mst_decide_link_encoding_format = 160 mst_decide_link_encoding_format; 161 link_srv->edp_decide_link_settings = edp_decide_link_settings; 162 link_srv->bw_kbps_from_raw_frl_link_rate_data = 163 link_bw_kbps_from_raw_frl_link_rate_data; 164 link_srv->dp_overwrite_extended_receiver_cap = 165 dp_overwrite_extended_receiver_cap; 166 link_srv->dp_decide_lttpr_mode = dp_decide_lttpr_mode; 167 } 168 169 /* link dp phy/dpia implements basic dp phy/dpia functionality such as 170 * enable/disable output and set lane/drive settings. It is responsible for 171 * maintaining and update software state representing current phy/dpia status 172 * such as current link settings. 173 */ 174 static void construct_link_service_dp_phy_or_dpia(struct link_service *link_srv) 175 { 176 link_srv->dpia_handle_usb4_bandwidth_allocation_for_link = 177 dpia_handle_usb4_bandwidth_allocation_for_link; 178 link_srv->dpia_handle_bw_alloc_response = dpia_handle_bw_alloc_response; 179 link_srv->dp_set_drive_settings = dp_set_drive_settings; 180 link_srv->dpcd_write_rx_power_ctrl = dpcd_write_rx_power_ctrl; 181 } 182 183 /* link dp irq handler implements DP HPD short pulse handling sequence according 184 * to DP specifications 185 */ 186 static void construct_link_service_dp_irq_handler(struct link_service *link_srv) 187 { 188 link_srv->dp_parse_link_loss_status = dp_parse_link_loss_status; 189 link_srv->dp_should_allow_hpd_rx_irq = dp_should_allow_hpd_rx_irq; 190 link_srv->dp_handle_link_loss = dp_handle_link_loss; 191 link_srv->dp_read_hpd_rx_irq_data = dp_read_hpd_rx_irq_data; 192 link_srv->dp_handle_hpd_rx_irq = dp_handle_hpd_rx_irq; 193 } 194 195 /* link edp panel control implements retrieval and configuration of eDP panel 196 * features such as PSR and ABM and it also manages specs defined eDP panel 197 * power sequences. 198 */ 199 static void construct_link_service_edp_panel_control(struct link_service *link_srv) 200 { 201 link_srv->edp_panel_backlight_power_on = edp_panel_backlight_power_on; 202 link_srv->edp_get_backlight_level = edp_get_backlight_level; 203 link_srv->edp_get_backlight_level_nits = edp_get_backlight_level_nits; 204 link_srv->edp_set_backlight_level = edp_set_backlight_level; 205 link_srv->edp_set_backlight_level_nits = edp_set_backlight_level_nits; 206 link_srv->edp_get_target_backlight_pwm = edp_get_target_backlight_pwm; 207 link_srv->edp_get_psr_state = edp_get_psr_state; 208 link_srv->edp_set_psr_allow_active = edp_set_psr_allow_active; 209 link_srv->edp_setup_psr = edp_setup_psr; 210 link_srv->edp_set_sink_vtotal_in_psr_active = 211 edp_set_sink_vtotal_in_psr_active; 212 link_srv->edp_get_psr_residency = edp_get_psr_residency; 213 214 link_srv->edp_get_replay_state = edp_get_replay_state; 215 link_srv->edp_set_replay_allow_active = edp_set_replay_allow_active; 216 link_srv->edp_setup_replay = edp_setup_replay; 217 link_srv->edp_send_replay_cmd = edp_send_replay_cmd; 218 link_srv->edp_set_coasting_vtotal = edp_set_coasting_vtotal; 219 link_srv->edp_replay_residency = edp_replay_residency; 220 link_srv->edp_set_replay_power_opt_and_coasting_vtotal = edp_set_replay_power_opt_and_coasting_vtotal; 221 222 link_srv->edp_wait_for_t12 = edp_wait_for_t12; 223 link_srv->edp_is_ilr_optimization_required = 224 edp_is_ilr_optimization_required; 225 link_srv->edp_backlight_enable_aux = edp_backlight_enable_aux; 226 link_srv->edp_add_delay_for_T9 = edp_add_delay_for_T9; 227 link_srv->edp_receiver_ready_T9 = edp_receiver_ready_T9; 228 link_srv->edp_receiver_ready_T7 = edp_receiver_ready_T7; 229 link_srv->edp_power_alpm_dpcd_enable = edp_power_alpm_dpcd_enable; 230 link_srv->edp_set_panel_power = edp_set_panel_power; 231 } 232 233 /* link dp cts implements dp compliance test automation protocols and manual 234 * testing interfaces for debugging and certification purpose. 235 */ 236 static void construct_link_service_dp_cts(struct link_service *link_srv) 237 { 238 link_srv->dp_handle_automated_test = dp_handle_automated_test; 239 link_srv->dp_set_test_pattern = dp_set_test_pattern; 240 link_srv->dp_set_preferred_link_settings = 241 dp_set_preferred_link_settings; 242 link_srv->dp_set_preferred_training_settings = 243 dp_set_preferred_training_settings; 244 } 245 246 /* link dp trace implements tracing interfaces for tracking major dp sequences 247 * including execution status and timestamps 248 */ 249 static void construct_link_service_dp_trace(struct link_service *link_srv) 250 { 251 link_srv->dp_trace_is_initialized = dp_trace_is_initialized; 252 link_srv->dp_trace_set_is_logged_flag = dp_trace_set_is_logged_flag; 253 link_srv->dp_trace_is_logged = dp_trace_is_logged; 254 link_srv->dp_trace_get_lt_end_timestamp = dp_trace_get_lt_end_timestamp; 255 link_srv->dp_trace_get_lt_counts = dp_trace_get_lt_counts; 256 link_srv->dp_trace_get_link_loss_count = dp_trace_get_link_loss_count; 257 link_srv->dp_trace_set_edp_power_timestamp = 258 dp_trace_set_edp_power_timestamp; 259 link_srv->dp_trace_get_edp_poweron_timestamp = 260 dp_trace_get_edp_poweron_timestamp; 261 link_srv->dp_trace_get_edp_poweroff_timestamp = 262 dp_trace_get_edp_poweroff_timestamp; 263 link_srv->dp_trace_source_sequence = dp_trace_source_sequence; 264 } 265 266 static void construct_link_service(struct link_service *link_srv) 267 { 268 /* All link service functions should fall under some sub categories. 269 * If a new function doesn't perfectly fall under an existing sub 270 * category, it must be that you are either adding a whole new aspect of 271 * responsibility to link service or something doesn't belong to link 272 * service. In that case please contact the arch owner to arrange a 273 * design review meeting. 274 */ 275 construct_link_service_factory(link_srv); 276 construct_link_service_detection(link_srv); 277 construct_link_service_resource(link_srv); 278 construct_link_service_validation(link_srv); 279 construct_link_service_dpms(link_srv); 280 construct_link_service_ddc(link_srv); 281 construct_link_service_dp_capability(link_srv); 282 construct_link_service_dp_phy_or_dpia(link_srv); 283 construct_link_service_dp_irq_handler(link_srv); 284 construct_link_service_edp_panel_control(link_srv); 285 construct_link_service_dp_cts(link_srv); 286 construct_link_service_dp_trace(link_srv); 287 } 288 289 struct link_service *link_create_link_service(void) 290 { 291 struct link_service *link_srv = kzalloc(sizeof(*link_srv), GFP_KERNEL); 292 293 if (link_srv == NULL) 294 goto fail; 295 296 construct_link_service(link_srv); 297 298 return link_srv; 299 fail: 300 return NULL; 301 } 302 303 void link_destroy_link_service(struct link_service **link_srv) 304 { 305 kfree(*link_srv); 306 *link_srv = NULL; 307 } 308 309 static enum transmitter translate_encoder_to_transmitter( 310 struct graphics_object_id encoder) 311 { 312 switch (encoder.id) { 313 case ENCODER_ID_INTERNAL_UNIPHY: 314 switch (encoder.enum_id) { 315 case ENUM_ID_1: 316 return TRANSMITTER_UNIPHY_A; 317 case ENUM_ID_2: 318 return TRANSMITTER_UNIPHY_B; 319 default: 320 return TRANSMITTER_UNKNOWN; 321 } 322 break; 323 case ENCODER_ID_INTERNAL_UNIPHY1: 324 switch (encoder.enum_id) { 325 case ENUM_ID_1: 326 return TRANSMITTER_UNIPHY_C; 327 case ENUM_ID_2: 328 return TRANSMITTER_UNIPHY_D; 329 default: 330 return TRANSMITTER_UNKNOWN; 331 } 332 break; 333 case ENCODER_ID_INTERNAL_UNIPHY2: 334 switch (encoder.enum_id) { 335 case ENUM_ID_1: 336 return TRANSMITTER_UNIPHY_E; 337 case ENUM_ID_2: 338 return TRANSMITTER_UNIPHY_F; 339 default: 340 return TRANSMITTER_UNKNOWN; 341 } 342 break; 343 case ENCODER_ID_INTERNAL_UNIPHY3: 344 switch (encoder.enum_id) { 345 case ENUM_ID_1: 346 return TRANSMITTER_UNIPHY_G; 347 default: 348 return TRANSMITTER_UNKNOWN; 349 } 350 break; 351 case ENCODER_ID_EXTERNAL_NUTMEG: 352 switch (encoder.enum_id) { 353 case ENUM_ID_1: 354 return TRANSMITTER_NUTMEG_CRT; 355 default: 356 return TRANSMITTER_UNKNOWN; 357 } 358 break; 359 case ENCODER_ID_EXTERNAL_TRAVIS: 360 switch (encoder.enum_id) { 361 case ENUM_ID_1: 362 return TRANSMITTER_TRAVIS_CRT; 363 case ENUM_ID_2: 364 return TRANSMITTER_TRAVIS_LCD; 365 default: 366 return TRANSMITTER_UNKNOWN; 367 } 368 break; 369 default: 370 return TRANSMITTER_UNKNOWN; 371 } 372 } 373 374 static void link_destruct(struct dc_link *link) 375 { 376 int i; 377 378 if (link->hpd_gpio) { 379 dal_gpio_destroy_irq(&link->hpd_gpio); 380 link->hpd_gpio = NULL; 381 } 382 383 if (link->ddc) 384 link_destroy_ddc_service(&link->ddc); 385 386 if (link->panel_cntl) 387 link->panel_cntl->funcs->destroy(&link->panel_cntl); 388 389 if (link->link_enc && !link->is_dig_mapping_flexible) { 390 /* Update link encoder resource tracking variables. These are used for 391 * the dynamic assignment of link encoders to streams. Virtual links 392 * are not assigned encoder resources on creation. 393 */ 394 if (link->link_id.id != CONNECTOR_ID_VIRTUAL && link->eng_id != ENGINE_ID_UNKNOWN) { 395 link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL; 396 link->dc->res_pool->dig_link_enc_count--; 397 } 398 link->link_enc->funcs->destroy(&link->link_enc); 399 } 400 401 if (link->local_sink) 402 dc_sink_release(link->local_sink); 403 404 for (i = 0; i < link->sink_count; ++i) 405 dc_sink_release(link->remote_sinks[i]); 406 } 407 408 static enum channel_id get_ddc_line(struct dc_link *link) 409 { 410 struct ddc *ddc; 411 enum channel_id channel; 412 413 channel = CHANNEL_ID_UNKNOWN; 414 415 ddc = get_ddc_pin(link->ddc); 416 417 if (ddc) { 418 switch (dal_ddc_get_line(ddc)) { 419 case GPIO_DDC_LINE_DDC1: 420 channel = CHANNEL_ID_DDC1; 421 break; 422 case GPIO_DDC_LINE_DDC2: 423 channel = CHANNEL_ID_DDC2; 424 break; 425 case GPIO_DDC_LINE_DDC3: 426 channel = CHANNEL_ID_DDC3; 427 break; 428 case GPIO_DDC_LINE_DDC4: 429 channel = CHANNEL_ID_DDC4; 430 break; 431 case GPIO_DDC_LINE_DDC5: 432 channel = CHANNEL_ID_DDC5; 433 break; 434 case GPIO_DDC_LINE_DDC6: 435 channel = CHANNEL_ID_DDC6; 436 break; 437 case GPIO_DDC_LINE_DDC_VGA: 438 channel = CHANNEL_ID_DDC_VGA; 439 break; 440 case GPIO_DDC_LINE_I2C_PAD: 441 channel = CHANNEL_ID_I2C_PAD; 442 break; 443 default: 444 BREAK_TO_DEBUGGER(); 445 break; 446 } 447 } 448 449 return channel; 450 } 451 452 static bool construct_phy(struct dc_link *link, 453 const struct link_init_data *init_params) 454 { 455 uint8_t i; 456 struct ddc_service_init_data ddc_service_init_data = { 0 }; 457 struct dc_context *dc_ctx = init_params->ctx; 458 struct encoder_init_data enc_init_data = { 0 }; 459 struct panel_cntl_init_data panel_cntl_init_data = { 0 }; 460 struct dc_bios *bios = init_params->dc->ctx->dc_bios; 461 const struct dc_vbios_funcs *bp_funcs = bios->funcs; 462 struct bp_disp_connector_caps_info disp_connect_caps_info = { 0 }; 463 464 DC_LOGGER_INIT(dc_ctx->logger); 465 466 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 467 link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID; 468 link->link_status.dpcd_caps = &link->dpcd_caps; 469 470 link->dc = init_params->dc; 471 link->ctx = dc_ctx; 472 link->link_index = init_params->link_index; 473 474 memset(&link->preferred_training_settings, 0, 475 sizeof(struct dc_link_training_overrides)); 476 memset(&link->preferred_link_setting, 0, 477 sizeof(struct dc_link_settings)); 478 479 link->link_id = 480 bios->funcs->get_connector_id(bios, init_params->connector_index); 481 482 link->ep_type = DISPLAY_ENDPOINT_PHY; 483 484 DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id); 485 486 if (bios->funcs->get_disp_connector_caps_info) { 487 bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info); 488 link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY; 489 DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display); 490 } 491 492 if (link->link_id.type != OBJECT_TYPE_CONNECTOR) { 493 dm_output_to_console("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n", 494 __func__, init_params->connector_index, 495 link->link_id.type, OBJECT_TYPE_CONNECTOR); 496 goto create_fail; 497 } 498 499 if (link->dc->res_pool->funcs->link_init) 500 link->dc->res_pool->funcs->link_init(link); 501 502 link->hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id, 503 link->ctx->gpio_service); 504 505 if (link->hpd_gpio) { 506 dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT); 507 dal_gpio_unlock_pin(link->hpd_gpio); 508 link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio); 509 510 DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id); 511 DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en); 512 } 513 514 switch (link->link_id.id) { 515 case CONNECTOR_ID_HDMI_TYPE_A: 516 link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A; 517 518 break; 519 case CONNECTOR_ID_SINGLE_LINK_DVID: 520 case CONNECTOR_ID_SINGLE_LINK_DVII: 521 link->connector_signal = SIGNAL_TYPE_DVI_SINGLE_LINK; 522 break; 523 case CONNECTOR_ID_DUAL_LINK_DVID: 524 case CONNECTOR_ID_DUAL_LINK_DVII: 525 link->connector_signal = SIGNAL_TYPE_DVI_DUAL_LINK; 526 break; 527 case CONNECTOR_ID_DISPLAY_PORT: 528 case CONNECTOR_ID_MXM: 529 case CONNECTOR_ID_USBC: 530 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT; 531 532 if (link->hpd_gpio) 533 link->irq_source_hpd_rx = 534 dal_irq_get_rx_source(link->hpd_gpio); 535 536 break; 537 case CONNECTOR_ID_EDP: 538 link->connector_signal = SIGNAL_TYPE_EDP; 539 540 if (link->hpd_gpio) { 541 if (!link->dc->config.allow_edp_hotplug_detection) 542 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 543 544 switch (link->dc->config.allow_edp_hotplug_detection) { 545 case HPD_EN_FOR_ALL_EDP: 546 link->irq_source_hpd_rx = 547 dal_irq_get_rx_source(link->hpd_gpio); 548 break; 549 case HPD_EN_FOR_PRIMARY_EDP_ONLY: 550 if (link->link_index == 0) 551 link->irq_source_hpd_rx = 552 dal_irq_get_rx_source(link->hpd_gpio); 553 else 554 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 555 break; 556 case HPD_EN_FOR_SECONDARY_EDP_ONLY: 557 if (link->link_index == 1) 558 link->irq_source_hpd_rx = 559 dal_irq_get_rx_source(link->hpd_gpio); 560 else 561 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 562 break; 563 default: 564 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 565 break; 566 } 567 } 568 569 break; 570 case CONNECTOR_ID_LVDS: 571 link->connector_signal = SIGNAL_TYPE_LVDS; 572 break; 573 default: 574 DC_LOG_WARNING("Unsupported Connector type:%d!\n", 575 link->link_id.id); 576 goto create_fail; 577 } 578 579 LINK_INFO("Connector[%d] description: signal: %s\n", 580 init_params->connector_index, 581 signal_type_to_string(link->connector_signal)); 582 583 ddc_service_init_data.ctx = link->ctx; 584 ddc_service_init_data.id = link->link_id; 585 ddc_service_init_data.link = link; 586 link->ddc = link_create_ddc_service(&ddc_service_init_data); 587 588 if (!link->ddc) { 589 DC_ERROR("Failed to create ddc_service!\n"); 590 goto ddc_create_fail; 591 } 592 593 if (!link->ddc->ddc_pin) { 594 DC_ERROR("Failed to get I2C info for connector!\n"); 595 goto ddc_create_fail; 596 } 597 598 link->ddc_hw_inst = 599 dal_ddc_get_line(get_ddc_pin(link->ddc)); 600 601 enc_init_data.ctx = dc_ctx; 602 bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0, 603 &enc_init_data.encoder); 604 enc_init_data.connector = link->link_id; 605 enc_init_data.channel = get_ddc_line(link); 606 enc_init_data.hpd_source = get_hpd_line(link); 607 608 link->hpd_src = enc_init_data.hpd_source; 609 610 enc_init_data.transmitter = 611 translate_encoder_to_transmitter(enc_init_data.encoder); 612 link->link_enc = 613 link->dc->res_pool->funcs->link_enc_create(dc_ctx, &enc_init_data); 614 615 if (!link->link_enc) { 616 DC_ERROR("Failed to create link encoder!\n"); 617 goto link_enc_create_fail; 618 } 619 620 DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C); 621 DC_LOG_DC("BIOS object table - IS_DP2_CAPABLE: %d", link->link_enc->features.flags.bits.IS_DP2_CAPABLE); 622 623 /* Update link encoder tracking variables. These are used for the dynamic 624 * assignment of link encoders to streams. 625 */ 626 link->eng_id = link->link_enc->preferred_engine; 627 link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc; 628 link->dc->res_pool->dig_link_enc_count++; 629 630 link->link_enc_hw_inst = link->link_enc->transmitter; 631 632 if (link->dc->res_pool->funcs->panel_cntl_create && 633 (link->link_id.id == CONNECTOR_ID_EDP || 634 link->link_id.id == CONNECTOR_ID_LVDS)) { 635 panel_cntl_init_data.ctx = dc_ctx; 636 panel_cntl_init_data.inst = panel_cntl_init_data.ctx->dc_edp_id_count; 637 panel_cntl_init_data.eng_id = link->eng_id; 638 link->panel_cntl = 639 link->dc->res_pool->funcs->panel_cntl_create( 640 &panel_cntl_init_data); 641 panel_cntl_init_data.ctx->dc_edp_id_count++; 642 643 if (link->panel_cntl == NULL) { 644 DC_ERROR("Failed to create link panel_cntl!\n"); 645 goto panel_cntl_create_fail; 646 } 647 } 648 for (i = 0; i < 4; i++) { 649 if (bp_funcs->get_device_tag(dc_ctx->dc_bios, 650 link->link_id, i, 651 &link->device_tag) != BP_RESULT_OK) { 652 DC_ERROR("Failed to find device tag!\n"); 653 goto device_tag_fail; 654 } 655 656 /* Look for device tag that matches connector signal, 657 * CRT for rgb, LCD for other supported signal tyes 658 */ 659 if (!bp_funcs->is_device_id_supported(dc_ctx->dc_bios, 660 link->device_tag.dev_id)) 661 continue; 662 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_CRT && 663 link->connector_signal != SIGNAL_TYPE_RGB) 664 continue; 665 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD && 666 link->connector_signal == SIGNAL_TYPE_RGB) 667 continue; 668 669 DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device); 670 DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type); 671 DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id); 672 break; 673 } 674 675 if (bios->integrated_info) { 676 /* Look for channel mapping corresponding to connector and device tag */ 677 for (i = 0; i < MAX_NUMBER_OF_EXT_DISPLAY_PATH; i++) { 678 struct external_display_path *path = 679 &bios->integrated_info->ext_disp_conn_info.path[i]; 680 681 if (path->device_connector_id.enum_id == link->link_id.enum_id && 682 path->device_connector_id.id == link->link_id.id && 683 path->device_connector_id.type == link->link_id.type) { 684 if (link->device_tag.acpi_device != 0 && 685 path->device_acpi_enum == link->device_tag.acpi_device) { 686 link->ddi_channel_mapping = path->channel_mapping; 687 link->chip_caps = path->caps; 688 DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", 689 link->ddi_channel_mapping.raw); 690 DC_LOG_DC("BIOS object table - chip_caps: %d", 691 link->chip_caps); 692 } else if (path->device_tag == 693 link->device_tag.dev_id.raw_device_tag) { 694 link->ddi_channel_mapping = path->channel_mapping; 695 link->chip_caps = path->caps; 696 DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", 697 link->ddi_channel_mapping.raw); 698 DC_LOG_DC("BIOS object table - chip_caps: %d", 699 link->chip_caps); 700 } 701 702 if ((link->chip_caps & AMD_EXT_DISPLAY_PATH_CAPS__EXT_CHIP_MASK) == AMD_EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) { 703 link->bios_forced_drive_settings.VOLTAGE_SWING = 704 (bios->integrated_info->ext_disp_conn_info.fixdpvoltageswing & 0x3); 705 link->bios_forced_drive_settings.PRE_EMPHASIS = 706 ((bios->integrated_info->ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3); 707 } 708 709 break; 710 } 711 } 712 } 713 if (bios->funcs->get_atom_dc_golden_table) 714 bios->funcs->get_atom_dc_golden_table(bios); 715 716 /* 717 * TODO check if GPIO programmed correctly 718 * 719 * If GPIO isn't programmed correctly HPD might not rise or drain 720 * fast enough, leading to bounces. 721 */ 722 program_hpd_filter(link); 723 724 link->psr_settings.psr_vtotal_control_support = false; 725 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED; 726 727 DC_LOG_DC("BIOS object table - %s finished successfully.\n", __func__); 728 return true; 729 device_tag_fail: 730 link->link_enc->funcs->destroy(&link->link_enc); 731 link_enc_create_fail: 732 if (link->panel_cntl != NULL) 733 link->panel_cntl->funcs->destroy(&link->panel_cntl); 734 panel_cntl_create_fail: 735 link_destroy_ddc_service(&link->ddc); 736 ddc_create_fail: 737 create_fail: 738 739 if (link->hpd_gpio) { 740 dal_gpio_destroy_irq(&link->hpd_gpio); 741 link->hpd_gpio = NULL; 742 } 743 744 DC_LOG_DC("BIOS object table - %s failed.\n", __func__); 745 return false; 746 } 747 748 static bool construct_dpia(struct dc_link *link, 749 const struct link_init_data *init_params) 750 { 751 struct ddc_service_init_data ddc_service_init_data = { 0 }; 752 struct dc_context *dc_ctx = init_params->ctx; 753 754 DC_LOGGER_INIT(dc_ctx->logger); 755 756 /* Initialized irq source for hpd and hpd rx */ 757 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID; 758 link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID; 759 link->link_status.dpcd_caps = &link->dpcd_caps; 760 761 link->dc = init_params->dc; 762 link->ctx = dc_ctx; 763 link->link_index = init_params->link_index; 764 765 memset(&link->preferred_training_settings, 0, 766 sizeof(struct dc_link_training_overrides)); 767 memset(&link->preferred_link_setting, 0, 768 sizeof(struct dc_link_settings)); 769 770 /* Dummy Init for linkid */ 771 link->link_id.type = OBJECT_TYPE_CONNECTOR; 772 link->link_id.id = CONNECTOR_ID_DISPLAY_PORT; 773 link->link_id.enum_id = ENUM_ID_1 + init_params->connector_index; 774 link->is_internal_display = false; 775 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT; 776 LINK_INFO("Connector[%d] description:signal %d\n", 777 init_params->connector_index, 778 link->connector_signal); 779 780 link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA; 781 link->is_dig_mapping_flexible = true; 782 783 /* TODO: Initialize link : funcs->link_init */ 784 785 ddc_service_init_data.ctx = link->ctx; 786 ddc_service_init_data.id = link->link_id; 787 ddc_service_init_data.link = link; 788 /* Set indicator for dpia link so that ddc wont be created */ 789 ddc_service_init_data.is_dpia_link = true; 790 791 link->ddc = link_create_ddc_service(&ddc_service_init_data); 792 if (!link->ddc) { 793 DC_ERROR("Failed to create ddc_service!\n"); 794 goto ddc_create_fail; 795 } 796 797 /* Set dpia port index : 0 to number of dpia ports */ 798 link->ddc_hw_inst = init_params->connector_index; 799 800 // Assign Dpia preferred eng_id 801 if (link->dc->res_pool->funcs->get_preferred_eng_id_dpia) 802 link->dpia_preferred_eng_id = link->dc->res_pool->funcs->get_preferred_eng_id_dpia(link->ddc_hw_inst); 803 804 /* TODO: Create link encoder */ 805 806 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED; 807 808 /* Some docks seem to NAK I2C writes to segment pointer with mot=0. */ 809 link->wa_flags.dp_mot_reset_segment = true; 810 811 return true; 812 813 ddc_create_fail: 814 return false; 815 } 816 817 static bool link_construct(struct dc_link *link, 818 const struct link_init_data *init_params) 819 { 820 /* Handle dpia case */ 821 if (init_params->is_dpia_link == true) 822 return construct_dpia(link, init_params); 823 else 824 return construct_phy(link, init_params); 825 } 826 827 struct dc_link *link_create(const struct link_init_data *init_params) 828 { 829 struct dc_link *link = 830 kzalloc(sizeof(*link), GFP_KERNEL); 831 832 if (NULL == link) 833 goto alloc_fail; 834 835 if (false == link_construct(link, init_params)) 836 goto construct_fail; 837 838 return link; 839 840 construct_fail: 841 kfree(link); 842 843 alloc_fail: 844 return NULL; 845 } 846 847 void link_destroy(struct dc_link **link) 848 { 849 link_destruct(*link); 850 kfree(*link); 851 *link = NULL; 852 } 853