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