drivers/gpu/drm/amd/display/dc/link/link_factory.c

   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_send_replay_cmd = edp_send_replay_cmd;
 217         link_srv->edp_set_coasting_vtotal = edp_set_coasting_vtotal;
 218         link_srv->edp_replay_residency = edp_replay_residency;
 219         link_srv->edp_set_replay_power_opt_and_coasting_vtotal = edp_set_replay_power_opt_and_coasting_vtotal;
 220
 221         link_srv->edp_wait_for_t12 = edp_wait_for_t12;
 222         link_srv->edp_is_ilr_optimization_required =
 223                         edp_is_ilr_optimization_required;
 224         link_srv->edp_backlight_enable_aux = edp_backlight_enable_aux;
 225         link_srv->edp_add_delay_for_T9 = edp_add_delay_for_T9;
 226         link_srv->edp_receiver_ready_T9 = edp_receiver_ready_T9;
 227         link_srv->edp_receiver_ready_T7 = edp_receiver_ready_T7;
 228         link_srv->edp_power_alpm_dpcd_enable = edp_power_alpm_dpcd_enable;
 229         link_srv->edp_set_panel_power = edp_set_panel_power;
 230 }
 231
 232 /* link dp cts implements dp compliance test automation protocols and manual
 233  * testing interfaces for debugging and certification purpose.
 234  */
 235 static void construct_link_service_dp_cts(struct link_service *link_srv)
 236 {
 237         link_srv->dp_handle_automated_test = dp_handle_automated_test;
 238         link_srv->dp_set_test_pattern = dp_set_test_pattern;
 239         link_srv->dp_set_preferred_link_settings =
 240                         dp_set_preferred_link_settings;
 241         link_srv->dp_set_preferred_training_settings =
 242                         dp_set_preferred_training_settings;
 243 }
 244
 245 /* link dp trace implements tracing interfaces for tracking major dp sequences
 246  * including execution status and timestamps
 247  */
 248 static void construct_link_service_dp_trace(struct link_service *link_srv)
 249 {
 250         link_srv->dp_trace_is_initialized = dp_trace_is_initialized;
 251         link_srv->dp_trace_set_is_logged_flag = dp_trace_set_is_logged_flag;
 252         link_srv->dp_trace_is_logged = dp_trace_is_logged;
 253         link_srv->dp_trace_get_lt_end_timestamp = dp_trace_get_lt_end_timestamp;
 254         link_srv->dp_trace_get_lt_counts = dp_trace_get_lt_counts;
 255         link_srv->dp_trace_get_link_loss_count = dp_trace_get_link_loss_count;
 256         link_srv->dp_trace_set_edp_power_timestamp =
 257                         dp_trace_set_edp_power_timestamp;
 258         link_srv->dp_trace_get_edp_poweron_timestamp =
 259                         dp_trace_get_edp_poweron_timestamp;
 260         link_srv->dp_trace_get_edp_poweroff_timestamp =
 261                         dp_trace_get_edp_poweroff_timestamp;
 262         link_srv->dp_trace_source_sequence = dp_trace_source_sequence;
 263 }
 264
 265 static void construct_link_service(struct link_service *link_srv)
 266 {
 267         /* All link service functions should fall under some sub categories.
 268          * If a new function doesn't perfectly fall under an existing sub
 269          * category, it must be that you are either adding a whole new aspect of
 270          * responsibility to link service or something doesn't belong to link
 271          * service. In that case please contact the arch owner to arrange a
 272          * design review meeting.
 273          */
 274         construct_link_service_factory(link_srv);
 275         construct_link_service_detection(link_srv);
 276         construct_link_service_resource(link_srv);
 277         construct_link_service_validation(link_srv);
 278         construct_link_service_dpms(link_srv);
 279         construct_link_service_ddc(link_srv);
 280         construct_link_service_dp_capability(link_srv);
 281         construct_link_service_dp_phy_or_dpia(link_srv);
 282         construct_link_service_dp_irq_handler(link_srv);
 283         construct_link_service_edp_panel_control(link_srv);
 284         construct_link_service_dp_cts(link_srv);
 285         construct_link_service_dp_trace(link_srv);
 286 }
 287
 288 struct link_service *link_create_link_service(void)
 289 {
 290         struct link_service *link_srv = kzalloc(sizeof(*link_srv), GFP_KERNEL);
 291
 292         if (link_srv == NULL)
 293                 goto fail;
 294
 295         construct_link_service(link_srv);
 296
 297         return link_srv;
 298 fail:
 299         return NULL;
 300 }
 301
 302 void link_destroy_link_service(struct link_service **link_srv)
 303 {
 304         kfree(*link_srv);
 305         *link_srv = NULL;
 306 }
 307
 308 static enum transmitter translate_encoder_to_transmitter(
 309                 struct graphics_object_id encoder)
 310 {
 311         switch (encoder.id) {
 312         case ENCODER_ID_INTERNAL_UNIPHY:
 313                 switch (encoder.enum_id) {
 314                 case ENUM_ID_1:
 315                         return TRANSMITTER_UNIPHY_A;
 316                 case ENUM_ID_2:
 317                         return TRANSMITTER_UNIPHY_B;
 318                 default:
 319                         return TRANSMITTER_UNKNOWN;
 320                 }
 321         break;
 322         case ENCODER_ID_INTERNAL_UNIPHY1:
 323                 switch (encoder.enum_id) {
 324                 case ENUM_ID_1:
 325                         return TRANSMITTER_UNIPHY_C;
 326                 case ENUM_ID_2:
 327                         return TRANSMITTER_UNIPHY_D;
 328                 default:
 329                         return TRANSMITTER_UNKNOWN;
 330                 }
 331         break;
 332         case ENCODER_ID_INTERNAL_UNIPHY2:
 333                 switch (encoder.enum_id) {
 334                 case ENUM_ID_1:
 335                         return TRANSMITTER_UNIPHY_E;
 336                 case ENUM_ID_2:
 337                         return TRANSMITTER_UNIPHY_F;
 338                 default:
 339                         return TRANSMITTER_UNKNOWN;
 340                 }
 341         break;
 342         case ENCODER_ID_INTERNAL_UNIPHY3:
 343                 switch (encoder.enum_id) {
 344                 case ENUM_ID_1:
 345                         return TRANSMITTER_UNIPHY_G;
 346                 default:
 347                         return TRANSMITTER_UNKNOWN;
 348                 }
 349         break;
 350         case ENCODER_ID_EXTERNAL_NUTMEG:
 351                 switch (encoder.enum_id) {
 352                 case ENUM_ID_1:
 353                         return TRANSMITTER_NUTMEG_CRT;
 354                 default:
 355                         return TRANSMITTER_UNKNOWN;
 356                 }
 357         break;
 358         case ENCODER_ID_EXTERNAL_TRAVIS:
 359                 switch (encoder.enum_id) {
 360                 case ENUM_ID_1:
 361                         return TRANSMITTER_TRAVIS_CRT;
 362                 case ENUM_ID_2:
 363                         return TRANSMITTER_TRAVIS_LCD;
 364                 default:
 365                         return TRANSMITTER_UNKNOWN;
 366                 }
 367         break;
 368         default:
 369                 return TRANSMITTER_UNKNOWN;
 370         }
 371 }
 372
 373 static void link_destruct(struct dc_link *link)
 374 {
 375         int i;
 376
 377         if (link->hpd_gpio) {
 378                 dal_gpio_destroy_irq(&link->hpd_gpio);
 379                 link->hpd_gpio = NULL;
 380         }
 381
 382         if (link->ddc)
 383                 link_destroy_ddc_service(&link->ddc);
 384
 385         if (link->panel_cntl)
 386                 link->panel_cntl->funcs->destroy(&link->panel_cntl);
 387
 388         if (link->link_enc && !link->is_dig_mapping_flexible) {
 389                 /* Update link encoder resource tracking variables. These are used for
 390                  * the dynamic assignment of link encoders to streams. Virtual links
 391                  * are not assigned encoder resources on creation.
 392                  */
 393                 if (link->link_id.id != CONNECTOR_ID_VIRTUAL && link->eng_id != ENGINE_ID_UNKNOWN) {
 394                         link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL;
 395                         link->dc->res_pool->dig_link_enc_count--;
 396                 }
 397                 link->link_enc->funcs->destroy(&link->link_enc);
 398         }
 399
 400         if (link->local_sink)
 401                 dc_sink_release(link->local_sink);
 402
 403         for (i = 0; i < link->sink_count; ++i)
 404                 dc_sink_release(link->remote_sinks[i]);
 405 }
 406
 407 static enum channel_id get_ddc_line(struct dc_link *link)
 408 {
 409         struct ddc *ddc;
 410         enum channel_id channel;
 411
 412         channel = CHANNEL_ID_UNKNOWN;
 413
 414         ddc = get_ddc_pin(link->ddc);
 415
 416         if (ddc) {
 417                 switch (dal_ddc_get_line(ddc)) {
 418                 case GPIO_DDC_LINE_DDC1:
 419                         channel = CHANNEL_ID_DDC1;
 420                         break;
 421                 case GPIO_DDC_LINE_DDC2:
 422                         channel = CHANNEL_ID_DDC2;
 423                         break;
 424                 case GPIO_DDC_LINE_DDC3:
 425                         channel = CHANNEL_ID_DDC3;
 426                         break;
 427                 case GPIO_DDC_LINE_DDC4:
 428                         channel = CHANNEL_ID_DDC4;
 429                         break;
 430                 case GPIO_DDC_LINE_DDC5:
 431                         channel = CHANNEL_ID_DDC5;
 432                         break;
 433                 case GPIO_DDC_LINE_DDC6:
 434                         channel = CHANNEL_ID_DDC6;
 435                         break;
 436                 case GPIO_DDC_LINE_DDC_VGA:
 437                         channel = CHANNEL_ID_DDC_VGA;
 438                         break;
 439                 case GPIO_DDC_LINE_I2C_PAD:
 440                         channel = CHANNEL_ID_I2C_PAD;
 441                         break;
 442                 default:
 443                         BREAK_TO_DEBUGGER();
 444                         break;
 445                 }
 446         }
 447
 448         return channel;
 449 }
 450
 451 static bool construct_phy(struct dc_link *link,
 452                               const struct link_init_data *init_params)
 453 {
 454         uint8_t i;
 455         struct ddc_service_init_data ddc_service_init_data = { 0 };
 456         struct dc_context *dc_ctx = init_params->ctx;
 457         struct encoder_init_data enc_init_data = { 0 };
 458         struct panel_cntl_init_data panel_cntl_init_data = { 0 };
 459         struct dc_bios *bios = init_params->dc->ctx->dc_bios;
 460         const struct dc_vbios_funcs *bp_funcs = bios->funcs;
 461         struct bp_disp_connector_caps_info disp_connect_caps_info = { 0 };
 462
 463         DC_LOGGER_INIT(dc_ctx->logger);
 464
 465         link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 466         link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
 467         link->link_status.dpcd_caps = &link->dpcd_caps;
 468
 469         link->dc = init_params->dc;
 470         link->ctx = dc_ctx;
 471         link->link_index = init_params->link_index;
 472
 473         memset(&link->preferred_training_settings, 0,
 474                sizeof(struct dc_link_training_overrides));
 475         memset(&link->preferred_link_setting, 0,
 476                sizeof(struct dc_link_settings));
 477
 478         link->link_id =
 479                 bios->funcs->get_connector_id(bios, init_params->connector_index);
 480
 481         link->ep_type = DISPLAY_ENDPOINT_PHY;
 482
 483         DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id);
 484
 485         if (bios->funcs->get_disp_connector_caps_info) {
 486                 bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info);
 487                 link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY;
 488                 DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display);
 489         }
 490
 491         if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
 492                 dm_output_to_console("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",
 493                                      __func__, init_params->connector_index,
 494                                      link->link_id.type, OBJECT_TYPE_CONNECTOR);
 495                 goto create_fail;
 496         }
 497
 498         if (link->dc->res_pool->funcs->link_init)
 499                 link->dc->res_pool->funcs->link_init(link);
 500
 501         link->hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
 502                                       link->ctx->gpio_service);
 503
 504         if (link->hpd_gpio) {
 505                 dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT);
 506                 dal_gpio_unlock_pin(link->hpd_gpio);
 507                 link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio);
 508
 509                 DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id);
 510                 DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en);
 511         }
 512
 513         switch (link->link_id.id) {
 514         case CONNECTOR_ID_HDMI_TYPE_A:
 515                 link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A;
 516
 517                 break;
 518         case CONNECTOR_ID_SINGLE_LINK_DVID:
 519         case CONNECTOR_ID_SINGLE_LINK_DVII:
 520                 link->connector_signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
 521                 break;
 522         case CONNECTOR_ID_DUAL_LINK_DVID:
 523         case CONNECTOR_ID_DUAL_LINK_DVII:
 524                 link->connector_signal = SIGNAL_TYPE_DVI_DUAL_LINK;
 525                 break;
 526         case CONNECTOR_ID_DISPLAY_PORT:
 527         case CONNECTOR_ID_MXM:
 528         case CONNECTOR_ID_USBC:
 529                 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
 530
 531                 if (link->hpd_gpio)
 532                         link->irq_source_hpd_rx =
 533                                         dal_irq_get_rx_source(link->hpd_gpio);
 534
 535                 break;
 536         case CONNECTOR_ID_EDP:
 537                 link->connector_signal = SIGNAL_TYPE_EDP;
 538
 539                 if (link->hpd_gpio) {
 540                         if (!link->dc->config.allow_edp_hotplug_detection)
 541                                 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 542
 543                         switch (link->dc->config.allow_edp_hotplug_detection) {
 544                         case HPD_EN_FOR_ALL_EDP:
 545                                 link->irq_source_hpd_rx =
 546                                                 dal_irq_get_rx_source(link->hpd_gpio);
 547                                 break;
 548                         case HPD_EN_FOR_PRIMARY_EDP_ONLY:
 549                                 if (link->link_index == 0)
 550                                         link->irq_source_hpd_rx =
 551                                                 dal_irq_get_rx_source(link->hpd_gpio);
 552                                 else
 553                                         link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 554                                 break;
 555                         case HPD_EN_FOR_SECONDARY_EDP_ONLY:
 556                                 if (link->link_index == 1)
 557                                         link->irq_source_hpd_rx =
 558                                                 dal_irq_get_rx_source(link->hpd_gpio);
 559                                 else
 560                                         link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 561                                 break;
 562                         default:
 563                                 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 564                                 break;
 565                         }
 566                 }
 567
 568                 break;
 569         case CONNECTOR_ID_LVDS:
 570                 link->connector_signal = SIGNAL_TYPE_LVDS;
 571                 break;
 572         default:
 573                 DC_LOG_WARNING("Unsupported Connector type:%d!\n",
 574                                link->link_id.id);
 575                 goto create_fail;
 576         }
 577
 578         LINK_INFO("Connector[%d] description: signal: %s\n",
 579                   init_params->connector_index,
 580                   signal_type_to_string(link->connector_signal));
 581
 582         ddc_service_init_data.ctx = link->ctx;
 583         ddc_service_init_data.id = link->link_id;
 584         ddc_service_init_data.link = link;
 585         link->ddc = link_create_ddc_service(&ddc_service_init_data);
 586
 587         if (!link->ddc) {
 588                 DC_ERROR("Failed to create ddc_service!\n");
 589                 goto ddc_create_fail;
 590         }
 591
 592         if (!link->ddc->ddc_pin) {
 593                 DC_ERROR("Failed to get I2C info for connector!\n");
 594                 goto ddc_create_fail;
 595         }
 596
 597         link->ddc_hw_inst =
 598                 dal_ddc_get_line(get_ddc_pin(link->ddc));
 599
 600         enc_init_data.ctx = dc_ctx;
 601         bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0,
 602                               &enc_init_data.encoder);
 603         enc_init_data.connector = link->link_id;
 604         enc_init_data.channel = get_ddc_line(link);
 605         enc_init_data.hpd_source = get_hpd_line(link);
 606
 607         link->hpd_src = enc_init_data.hpd_source;
 608
 609         enc_init_data.transmitter =
 610                 translate_encoder_to_transmitter(enc_init_data.encoder);
 611         link->link_enc =
 612                 link->dc->res_pool->funcs->link_enc_create(dc_ctx, &enc_init_data);
 613
 614         if (!link->link_enc) {
 615                 DC_ERROR("Failed to create link encoder!\n");
 616                 goto link_enc_create_fail;
 617         }
 618
 619         DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
 620         DC_LOG_DC("BIOS object table - IS_DP2_CAPABLE: %d", link->link_enc->features.flags.bits.IS_DP2_CAPABLE);
 621
 622         /* Update link encoder tracking variables. These are used for the dynamic
 623          * assignment of link encoders to streams.
 624          */
 625         link->eng_id = link->link_enc->preferred_engine;
 626         link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc;
 627         link->dc->res_pool->dig_link_enc_count++;
 628
 629         link->link_enc_hw_inst = link->link_enc->transmitter;
 630
 631         if (link->dc->res_pool->funcs->panel_cntl_create &&
 632                 (link->link_id.id == CONNECTOR_ID_EDP ||
 633                         link->link_id.id == CONNECTOR_ID_LVDS)) {
 634                 panel_cntl_init_data.ctx = dc_ctx;
 635                 panel_cntl_init_data.inst = panel_cntl_init_data.ctx->dc_edp_id_count;
 636                 panel_cntl_init_data.eng_id = link->eng_id;
 637                 link->panel_cntl =
 638                         link->dc->res_pool->funcs->panel_cntl_create(
 639                                                                 &panel_cntl_init_data);
 640                 panel_cntl_init_data.ctx->dc_edp_id_count++;
 641
 642                 if (link->panel_cntl == NULL) {
 643                         DC_ERROR("Failed to create link panel_cntl!\n");
 644                         goto panel_cntl_create_fail;
 645                 }
 646         }
 647         for (i = 0; i < 4; i++) {
 648                 if (bp_funcs->get_device_tag(dc_ctx->dc_bios,
 649                                              link->link_id, i,
 650                                              &link->device_tag) != BP_RESULT_OK) {
 651                         DC_ERROR("Failed to find device tag!\n");
 652                         goto device_tag_fail;
 653                 }
 654
 655                 /* Look for device tag that matches connector signal,
 656                  * CRT for rgb, LCD for other supported signal tyes
 657                  */
 658                 if (!bp_funcs->is_device_id_supported(dc_ctx->dc_bios,
 659                                                       link->device_tag.dev_id))
 660                         continue;
 661                 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_CRT &&
 662                     link->connector_signal != SIGNAL_TYPE_RGB)
 663                         continue;
 664                 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD &&
 665                     link->connector_signal == SIGNAL_TYPE_RGB)
 666                         continue;
 667
 668                 DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device);
 669                 DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type);
 670                 DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id);
 671                 break;
 672         }
 673
 674         if (bios->integrated_info) {
 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                                 &bios->integrated_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",
 688                                                   link->ddi_channel_mapping.raw);
 689                                         DC_LOG_DC("BIOS object table - chip_caps: %d",
 690                                                   link->chip_caps);
 691                                 } else if (path->device_tag ==
 692                                            link->device_tag.dev_id.raw_device_tag) {
 693                                         link->ddi_channel_mapping = path->channel_mapping;
 694                                         link->chip_caps = path->caps;
 695                                         DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X",
 696                                                   link->ddi_channel_mapping.raw);
 697                                         DC_LOG_DC("BIOS object table - chip_caps: %d",
 698                                                   link->chip_caps);
 699                                 }
 700
 701                                 if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) {
 702                                         link->bios_forced_drive_settings.VOLTAGE_SWING =
 703                                                 (bios->integrated_info->ext_disp_conn_info.fixdpvoltageswing & 0x3);
 704                                         link->bios_forced_drive_settings.PRE_EMPHASIS =
 705                                                 ((bios->integrated_info->ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3);
 706                                 }
 707
 708                                 break;
 709                         }
 710                 }
 711         }
 712         if (bios->funcs->get_atom_dc_golden_table)
 713                 bios->funcs->get_atom_dc_golden_table(bios);
 714
 715         /*
 716          * TODO check if GPIO programmed correctly
 717          *
 718          * If GPIO isn't programmed correctly HPD might not rise or drain
 719          * fast enough, leading to bounces.
 720          */
 721         program_hpd_filter(link);
 722
 723         link->psr_settings.psr_vtotal_control_support = false;
 724         link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
 725
 726         DC_LOG_DC("BIOS object table - %s finished successfully.\n", __func__);
 727         return true;
 728 device_tag_fail:
 729         link->link_enc->funcs->destroy(&link->link_enc);
 730 link_enc_create_fail:
 731         if (link->panel_cntl != NULL)
 732                 link->panel_cntl->funcs->destroy(&link->panel_cntl);
 733 panel_cntl_create_fail:
 734         link_destroy_ddc_service(&link->ddc);
 735 ddc_create_fail:
 736 create_fail:
 737
 738         if (link->hpd_gpio) {
 739                 dal_gpio_destroy_irq(&link->hpd_gpio);
 740                 link->hpd_gpio = NULL;
 741         }
 742
 743         DC_LOG_DC("BIOS object table - %s failed.\n", __func__);
 744         return false;
 745 }
 746
 747 static bool construct_dpia(struct dc_link *link,
 748                               const struct link_init_data *init_params)
 749 {
 750         struct ddc_service_init_data ddc_service_init_data = { 0 };
 751         struct dc_context *dc_ctx = init_params->ctx;
 752
 753         DC_LOGGER_INIT(dc_ctx->logger);
 754
 755         /* Initialized irq source for hpd and hpd rx */
 756         link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 757         link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
 758         link->link_status.dpcd_caps = &link->dpcd_caps;
 759
 760         link->dc = init_params->dc;
 761         link->ctx = dc_ctx;
 762         link->link_index = init_params->link_index;
 763
 764         memset(&link->preferred_training_settings, 0,
 765                sizeof(struct dc_link_training_overrides));
 766         memset(&link->preferred_link_setting, 0,
 767                sizeof(struct dc_link_settings));
 768
 769         /* Dummy Init for linkid */
 770         link->link_id.type = OBJECT_TYPE_CONNECTOR;
 771         link->link_id.id = CONNECTOR_ID_DISPLAY_PORT;
 772         link->link_id.enum_id = ENUM_ID_1 + init_params->connector_index;
 773         link->is_internal_display = false;
 774         link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
 775         LINK_INFO("Connector[%d] description:signal %d\n",
 776                   init_params->connector_index,
 777                   link->connector_signal);
 778
 779         link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA;
 780         link->is_dig_mapping_flexible = true;
 781
 782         /* TODO: Initialize link : funcs->link_init */
 783
 784         ddc_service_init_data.ctx = link->ctx;
 785         ddc_service_init_data.id = link->link_id;
 786         ddc_service_init_data.link = link;
 787         /* Set indicator for dpia link so that ddc wont be created */
 788         ddc_service_init_data.is_dpia_link = true;
 789
 790         link->ddc = link_create_ddc_service(&ddc_service_init_data);
 791         if (!link->ddc) {
 792                 DC_ERROR("Failed to create ddc_service!\n");
 793                 goto ddc_create_fail;
 794         }
 795
 796         /* Set dpia port index : 0 to number of dpia ports */
 797         link->ddc_hw_inst = init_params->connector_index;
 798
 799         // Assign Dpia preferred eng_id
 800         if (link->dc->res_pool->funcs->get_preferred_eng_id_dpia)
 801                 link->dpia_preferred_eng_id = link->dc->res_pool->funcs->get_preferred_eng_id_dpia(link->ddc_hw_inst);
 802
 803         /* TODO: Create link encoder */
 804
 805         link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
 806
 807         /* Some docks seem to NAK I2C writes to segment pointer with mot=0. */
 808         link->wa_flags.dp_mot_reset_segment = true;
 809
 810         return true;
 811
 812 ddc_create_fail:
 813         return false;
 814 }
 815
 816 static bool link_construct(struct dc_link *link,
 817                               const struct link_init_data *init_params)
 818 {
 819         /* Handle dpia case */
 820         if (init_params->is_dpia_link == true)
 821                 return construct_dpia(link, init_params);
 822         else
 823                 return construct_phy(link, init_params);
 824 }
 825
 826 struct dc_link *link_create(const struct link_init_data *init_params)
 827 {
 828         struct dc_link *link =
 829                         kzalloc(sizeof(*link), GFP_KERNEL);
 830
 831         if (NULL == link)
 832                 goto alloc_fail;
 833
 834         if (false == link_construct(link, init_params))
 835                 goto construct_fail;
 836
 837         return link;
 838
 839 construct_fail:
 840         kfree(link);
 841
 842 alloc_fail:
 843         return NULL;
 844 }
 845
 846 void link_destroy(struct dc_link **link)
 847 {
 848         link_destruct(*link);
 849         kfree(*link);
 850         *link = NULL;
 851 }