/*
* Copyright 2023 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: AMD
*
*/
/* FILE POLICY AND INTENDED USAGE:
* This file owns the creation/destruction of link structure.
*/
#include "link_factory.h"
#include "link_detection.h"
#include "link_resource.h"
#include "link_validation.h"
#include "link_dpms.h"
#include "accessories/link_dp_cts.h"
#include "accessories/link_dp_trace.h"
#include "protocols/link_ddc.h"
#include "protocols/link_dp_capability.h"
#include "protocols/link_dp_dpia_bw.h"
#include "protocols/link_dp_dpia.h"
#include "protocols/link_dp_irq_handler.h"
#include "protocols/link_dp_phy.h"
#include "protocols/link_dp_training.h"
#include "protocols/link_edp_panel_control.h"
#include "protocols/link_hpd.h"
#include "gpio_service_interface.h"
#include "atomfirmware.h"
#define DC_LOGGER \
dc_ctx->logger
#define DC_LOGGER_INIT(logger)
#define LINK_INFO(...) \
DC_LOG_HW_HOTPLUG( \
__VA_ARGS__)
/* link factory owns the creation/destruction of link structures. */
static void construct_link_service_factory(struct link_service *link_srv)
{
link_srv->create_link = link_create;
link_srv->destroy_link = link_destroy;
}
/* link_detection manages link detection states and receiver states by using
* various link protocols. It also provides helper functions to interpret
* certain capabilities or status based on the states it manages or retrieve
* them directly from connected receivers.
*/
static void construct_link_service_detection(struct link_service *link_srv)
{
link_srv->detect_link = link_detect;
link_srv->detect_connection_type = link_detect_connection_type;
link_srv->add_remote_sink = link_add_remote_sink;
link_srv->remove_remote_sink = link_remove_remote_sink;
link_srv->get_hpd_state = link_get_hpd_state;
link_srv->get_hpd_gpio = link_get_hpd_gpio;
link_srv->enable_hpd = link_enable_hpd;
link_srv->disable_hpd = link_disable_hpd;
link_srv->enable_hpd_filter = link_enable_hpd_filter;
link_srv->reset_cur_dp_mst_topology = link_reset_cur_dp_mst_topology;
link_srv->get_status = link_get_status;
link_srv->is_hdcp1x_supported = link_is_hdcp14;
link_srv->is_hdcp2x_supported = link_is_hdcp22;
link_srv->clear_dprx_states = link_clear_dprx_states;
}
/* link resource implements accessors to link resource. */
static void construct_link_service_resource(struct link_service *link_srv)
{
link_srv->get_cur_res_map = link_get_cur_res_map;
link_srv->restore_res_map = link_restore_res_map;
link_srv->get_cur_link_res = link_get_cur_link_res;
}
/* link validation owns timing validation against various link limitations. (ex.
* link bandwidth, receiver capability or our hardware capability) It also
* provides helper functions exposing bandwidth formulas used in validation.
*/
static void construct_link_service_validation(struct link_service *link_srv)
{
link_srv->validate_mode_timing = link_validate_mode_timing;
link_srv->dp_link_bandwidth_kbps = dp_link_bandwidth_kbps;
link_srv->validate_dpia_bandwidth = link_validate_dpia_bandwidth;
}
/* link dpms owns the programming sequence of stream's dpms state associated
* with the link and link's enable/disable sequences as result of the stream's
* dpms state change.
*/
static void construct_link_service_dpms(struct link_service *link_srv)
{
link_srv->set_dpms_on = link_set_dpms_on;
link_srv->set_dpms_off = link_set_dpms_off;
link_srv->resume = link_resume;
link_srv->blank_all_dp_displays = link_blank_all_dp_displays;
link_srv->blank_all_edp_displays = link_blank_all_edp_displays;
link_srv->blank_dp_stream = link_blank_dp_stream;
link_srv->increase_mst_payload = link_increase_mst_payload;
link_srv->reduce_mst_payload = link_reduce_mst_payload;
link_srv->set_dsc_on_stream = link_set_dsc_on_stream;
link_srv->set_dsc_enable = link_set_dsc_enable;
link_srv->update_dsc_config = link_update_dsc_config;
}
/* link ddc implements generic display communication protocols such as i2c, aux
* and scdc. It should not contain any specific applications of these
* protocols such as display capability query, detection, or handshaking such as
* link training.
*/
static void construct_link_service_ddc(struct link_service *link_srv)
{
link_srv->create_ddc_service = link_create_ddc_service;
link_srv->destroy_ddc_service = link_destroy_ddc_service;
link_srv->query_ddc_data = link_query_ddc_data;
link_srv->aux_transfer_raw = link_aux_transfer_raw;
link_srv->configure_fixed_vs_pe_retimer = link_configure_fixed_vs_pe_retimer;
link_srv->aux_transfer_with_retries_no_mutex =
link_aux_transfer_with_retries_no_mutex;
link_srv->is_in_aux_transaction_mode = link_is_in_aux_transaction_mode;
link_srv->get_aux_defer_delay = link_get_aux_defer_delay;
}
/* link dp capability implements dp specific link capability retrieval sequence.
* It is responsible for retrieving, parsing, overriding, deciding capability
* obtained from dp link. Link capability consists of encoders, DPRXs, cables,
* retimers, usb and all other possible backend capabilities.
*/
static void construct_link_service_dp_capability(struct link_service *link_srv)
{
link_srv->dp_is_sink_present = dp_is_sink_present;
link_srv->dp_is_fec_supported = dp_is_fec_supported;
link_srv->dp_is_128b_132b_signal = dp_is_128b_132b_signal;
link_srv->dp_get_max_link_enc_cap = dp_get_max_link_enc_cap;
link_srv->dp_get_verified_link_cap = dp_get_verified_link_cap;
link_srv->dp_get_encoding_format = link_dp_get_encoding_format;
link_srv->dp_should_enable_fec = dp_should_enable_fec;
link_srv->dp_decide_link_settings = link_decide_link_settings;
link_srv->mst_decide_link_encoding_format =
mst_decide_link_encoding_format;
link_srv->edp_decide_link_settings = edp_decide_link_settings;
link_srv->bw_kbps_from_raw_frl_link_rate_data =
link_bw_kbps_from_raw_frl_link_rate_data;
link_srv->dp_overwrite_extended_receiver_cap =
dp_overwrite_extended_receiver_cap;
link_srv->dp_decide_lttpr_mode = dp_decide_lttpr_mode;
}
/* link dp phy/dpia implements basic dp phy/dpia functionality such as
* enable/disable output and set lane/drive settings. It is responsible for
* maintaining and update software state representing current phy/dpia status
* such as current link settings.
*/
static void construct_link_service_dp_phy_or_dpia(struct link_service *link_srv)
{
link_srv->dpia_handle_usb4_bandwidth_allocation_for_link =
dpia_handle_usb4_bandwidth_allocation_for_link;
link_srv->dpia_handle_bw_alloc_response = dpia_handle_bw_alloc_response;
link_srv->dp_set_drive_settings = dp_set_drive_settings;
link_srv->dpcd_write_rx_power_ctrl = dpcd_write_rx_power_ctrl;
}
/* link dp irq handler implements DP HPD short pulse handling sequence according
* to DP specifications
*/
static void construct_link_service_dp_irq_handler(struct link_service *link_srv)
{
link_srv->dp_parse_link_loss_status = dp_parse_link_loss_status;
link_srv->dp_should_allow_hpd_rx_irq = dp_should_allow_hpd_rx_irq;
link_srv->dp_handle_link_loss = dp_handle_link_loss;
link_srv->dp_read_hpd_rx_irq_data = dp_read_hpd_rx_irq_data;
link_srv->dp_handle_hpd_rx_irq = dp_handle_hpd_rx_irq;
}
/* link edp panel control implements retrieval and configuration of eDP panel
* features such as PSR and ABM and it also manages specs defined eDP panel
* power sequences.
*/
static void construct_link_service_edp_panel_control(struct link_service *link_srv)
{
link_srv->edp_panel_backlight_power_on = edp_panel_backlight_power_on;
link_srv->edp_get_backlight_level = edp_get_backlight_level;
link_srv->edp_get_backlight_level_nits = edp_get_backlight_level_nits;
link_srv->edp_set_backlight_level = edp_set_backlight_level;
link_srv->edp_set_backlight_level_nits = edp_set_backlight_level_nits;
link_srv->edp_get_target_backlight_pwm = edp_get_target_backlight_pwm;
link_srv->edp_get_psr_state = edp_get_psr_state;
link_srv->edp_set_psr_allow_active = edp_set_psr_allow_active;
link_srv->edp_setup_psr = edp_setup_psr;
link_srv->edp_set_sink_vtotal_in_psr_active =
edp_set_sink_vtotal_in_psr_active;
link_srv->edp_get_psr_residency = edp_get_psr_residency;
link_srv->edp_get_replay_state = edp_get_replay_state;
link_srv->edp_set_replay_allow_active = edp_set_replay_allow_active;
link_srv->edp_setup_replay = edp_setup_replay;
link_srv->edp_send_replay_cmd = edp_send_replay_cmd;
link_srv->edp_set_coasting_vtotal = edp_set_coasting_vtotal;
link_srv->edp_replay_residency = edp_replay_residency;
link_srv->edp_set_replay_power_opt_and_coasting_vtotal = edp_set_replay_power_opt_and_coasting_vtotal;
link_srv->edp_wait_for_t12 = edp_wait_for_t12;
link_srv->edp_is_ilr_optimization_required =
edp_is_ilr_optimization_required;
link_srv->edp_backlight_enable_aux = edp_backlight_enable_aux;
link_srv->edp_add_delay_for_T9 = edp_add_delay_for_T9;
link_srv->edp_receiver_ready_T9 = edp_receiver_ready_T9;
link_srv->edp_receiver_ready_T7 = edp_receiver_ready_T7;
link_srv->edp_power_alpm_dpcd_enable = edp_power_alpm_dpcd_enable;
link_srv->edp_set_panel_power = edp_set_panel_power;
}
/* link dp cts implements dp compliance test automation protocols and manual
* testing interfaces for debugging and certification purpose.
*/
static void construct_link_service_dp_cts(struct link_service *link_srv)
{
link_srv->dp_handle_automated_test = dp_handle_automated_test;
link_srv->dp_set_test_pattern = dp_set_test_pattern;
link_srv->dp_set_preferred_link_settings =
dp_set_preferred_link_settings;
link_srv->dp_set_preferred_training_settings =
dp_set_preferred_training_settings;
}
/* link dp trace implements tracing interfaces for tracking major dp sequences
* including execution status and timestamps
*/
static void construct_link_service_dp_trace(struct link_service *link_srv)
{
link_srv->dp_trace_is_initialized = dp_trace_is_initialized;
link_srv->dp_trace_set_is_logged_flag = dp_trace_set_is_logged_flag;
link_srv->dp_trace_is_logged = dp_trace_is_logged;
link_srv->dp_trace_get_lt_end_timestamp = dp_trace_get_lt_end_timestamp;
link_srv->dp_trace_get_lt_counts = dp_trace_get_lt_counts;
link_srv->dp_trace_get_link_loss_count = dp_trace_get_link_loss_count;
link_srv->dp_trace_set_edp_power_timestamp =
dp_trace_set_edp_power_timestamp;
link_srv->dp_trace_get_edp_poweron_timestamp =
dp_trace_get_edp_poweron_timestamp;
link_srv->dp_trace_get_edp_poweroff_timestamp =
dp_trace_get_edp_poweroff_timestamp;
link_srv->dp_trace_source_sequence = dp_trace_source_sequence;
}
static void construct_link_service(struct link_service *link_srv)
{
/* All link service functions should fall under some sub categories.
* If a new function doesn't perfectly fall under an existing sub
* category, it must be that you are either adding a whole new aspect of
* responsibility to link service or something doesn't belong to link
* service. In that case please contact the arch owner to arrange a
* design review meeting.
*/
construct_link_service_factory(link_srv);
construct_link_service_detection(link_srv);
construct_link_service_resource(link_srv);
construct_link_service_validation(link_srv);
construct_link_service_dpms(link_srv);
construct_link_service_ddc(link_srv);
construct_link_service_dp_capability(link_srv);
construct_link_service_dp_phy_or_dpia(link_srv);
construct_link_service_dp_irq_handler(link_srv);
construct_link_service_edp_panel_control(link_srv);
construct_link_service_dp_cts(link_srv);
construct_link_service_dp_trace(link_srv);
}
struct link_service *link_create_link_service(void)
{
struct link_service *link_srv = kzalloc(sizeof(*link_srv), GFP_KERNEL);
if (link_srv == NULL)
goto fail;
construct_link_service(link_srv);
return link_srv;
fail:
return NULL;
}
void link_destroy_link_service(struct link_service **link_srv)
{
kfree(*link_srv);
*link_srv = NULL;
}
static enum transmitter translate_encoder_to_transmitter(
struct graphics_object_id encoder)
{
switch (encoder.id) {
case ENCODER_ID_INTERNAL_UNIPHY:
switch (encoder.enum_id) {
case ENUM_ID_1:
return TRANSMITTER_UNIPHY_A;
case ENUM_ID_2:
return TRANSMITTER_UNIPHY_B;
default:
return TRANSMITTER_UNKNOWN;
}
break;
case ENCODER_ID_INTERNAL_UNIPHY1:
switch (encoder.enum_id) {
case ENUM_ID_1:
return TRANSMITTER_UNIPHY_C;
case ENUM_ID_2:
return TRANSMITTER_UNIPHY_D;
default:
return TRANSMITTER_UNKNOWN;
}
break;
case ENCODER_ID_INTERNAL_UNIPHY2:
switch (encoder.enum_id) {
case ENUM_ID_1:
return TRANSMITTER_UNIPHY_E;
case ENUM_ID_2:
return TRANSMITTER_UNIPHY_F;
default:
return TRANSMITTER_UNKNOWN;
}
break;
case ENCODER_ID_INTERNAL_UNIPHY3:
switch (encoder.enum_id) {
case ENUM_ID_1:
return TRANSMITTER_UNIPHY_G;
default:
return TRANSMITTER_UNKNOWN;
}
break;
case ENCODER_ID_EXTERNAL_NUTMEG:
switch (encoder.enum_id) {
case ENUM_ID_1:
return TRANSMITTER_NUTMEG_CRT;
default:
return TRANSMITTER_UNKNOWN;
}
break;
case ENCODER_ID_EXTERNAL_TRAVIS:
switch (encoder.enum_id) {
case ENUM_ID_1:
return TRANSMITTER_TRAVIS_CRT;
case ENUM_ID_2:
return TRANSMITTER_TRAVIS_LCD;
default:
return TRANSMITTER_UNKNOWN;
}
break;
default:
return TRANSMITTER_UNKNOWN;
}
}
static void link_destruct(struct dc_link *link)
{
int i;
if (link->hpd_gpio) {
dal_gpio_destroy_irq(&link->hpd_gpio);
link->hpd_gpio = NULL;
}
if (link->ddc)
link_destroy_ddc_service(&link->ddc);
if (link->panel_cntl)
link->panel_cntl->funcs->destroy(&link->panel_cntl);
if (link->link_enc && !link->is_dig_mapping_flexible) {
/* Update link encoder resource tracking variables. These are used for
* the dynamic assignment of link encoders to streams. Virtual links
* are not assigned encoder resources on creation.
*/
if (link->link_id.id != CONNECTOR_ID_VIRTUAL && link->eng_id != ENGINE_ID_UNKNOWN) {
link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL;
link->dc->res_pool->dig_link_enc_count--;
}
link->link_enc->funcs->destroy(&link->link_enc);
}
if (link->local_sink)
dc_sink_release(link->local_sink);
for (i = 0; i < link->sink_count; ++i)
dc_sink_release(link->remote_sinks[i]);
}
static enum channel_id get_ddc_line(struct dc_link *link)
{
struct ddc *ddc;
enum channel_id channel;
channel = CHANNEL_ID_UNKNOWN;
ddc = get_ddc_pin(link->ddc);
if (ddc) {
switch (dal_ddc_get_line(ddc)) {
case GPIO_DDC_LINE_DDC1:
channel = CHANNEL_ID_DDC1;
break;
case GPIO_DDC_LINE_DDC2:
channel = CHANNEL_ID_DDC2;
break;
case GPIO_DDC_LINE_DDC3:
channel = CHANNEL_ID_DDC3;
break;
case GPIO_DDC_LINE_DDC4:
channel = CHANNEL_ID_DDC4;
break;
case GPIO_DDC_LINE_DDC5:
channel = CHANNEL_ID_DDC5;
break;
case GPIO_DDC_LINE_DDC6:
channel = CHANNEL_ID_DDC6;
break;
case GPIO_DDC_LINE_DDC_VGA:
channel = CHANNEL_ID_DDC_VGA;
break;
case GPIO_DDC_LINE_I2C_PAD:
channel = CHANNEL_ID_I2C_PAD;
break;
default:
BREAK_TO_DEBUGGER();
break;
}
}
return channel;
}
static bool construct_phy(struct dc_link *link,
const struct link_init_data *init_params)
{
uint8_t i;
struct ddc_service_init_data ddc_service_init_data = { 0 };
struct dc_context *dc_ctx = init_params->ctx;
struct encoder_init_data enc_init_data = { 0 };
struct panel_cntl_init_data panel_cntl_init_data = { 0 };
struct dc_bios *bios = init_params->dc->ctx->dc_bios;
const struct dc_vbios_funcs *bp_funcs = bios->funcs;
struct bp_disp_connector_caps_info disp_connect_caps_info = { 0 };
DC_LOGGER_INIT(dc_ctx->logger);
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
link->link_status.dpcd_caps = &link->dpcd_caps;
link->dc = init_params->dc;
link->ctx = dc_ctx;
link->link_index = init_params->link_index;
memset(&link->preferred_training_settings, 0,
sizeof(struct dc_link_training_overrides));
memset(&link->preferred_link_setting, 0,
sizeof(struct dc_link_settings));
link->link_id =
bios->funcs->get_connector_id(bios, init_params->connector_index);
link->ep_type = DISPLAY_ENDPOINT_PHY;
DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id);
if (bios->funcs->get_disp_connector_caps_info) {
bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info);
link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY;
DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display);
}
if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
dm_output_to_console("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",
__func__, init_params->connector_index,
link->link_id.type, OBJECT_TYPE_CONNECTOR);
goto create_fail;
}
if (link->dc->res_pool->funcs->link_init)
link->dc->res_pool->funcs->link_init(link);
link->hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
link->ctx->gpio_service);
if (link->hpd_gpio) {
dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT);
dal_gpio_unlock_pin(link->hpd_gpio);
link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio);
DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id);
DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en);
}
switch (link->link_id.id) {
case CONNECTOR_ID_HDMI_TYPE_A:
link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A;
break;
case CONNECTOR_ID_SINGLE_LINK_DVID:
case CONNECTOR_ID_SINGLE_LINK_DVII:
link->connector_signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
break;
case CONNECTOR_ID_DUAL_LINK_DVID:
case CONNECTOR_ID_DUAL_LINK_DVII:
link->connector_signal = SIGNAL_TYPE_DVI_DUAL_LINK;
break;
case CONNECTOR_ID_DISPLAY_PORT:
case CONNECTOR_ID_MXM:
case CONNECTOR_ID_USBC:
link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
if (link->hpd_gpio)
link->irq_source_hpd_rx =
dal_irq_get_rx_source(link->hpd_gpio);
break;
case CONNECTOR_ID_EDP:
link->connector_signal = SIGNAL_TYPE_EDP;
if (link->hpd_gpio) {
if (!link->dc->config.allow_edp_hotplug_detection)
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
switch (link->dc->config.allow_edp_hotplug_detection) {
case HPD_EN_FOR_ALL_EDP:
link->irq_source_hpd_rx =
dal_irq_get_rx_source(link->hpd_gpio);
break;
case HPD_EN_FOR_PRIMARY_EDP_ONLY:
if (link->link_index == 0)
link->irq_source_hpd_rx =
dal_irq_get_rx_source(link->hpd_gpio);
else
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
break;
case HPD_EN_FOR_SECONDARY_EDP_ONLY:
if (link->link_index == 1)
link->irq_source_hpd_rx =
dal_irq_get_rx_source(link->hpd_gpio);
else
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
break;
default:
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
break;
}
}
break;
case CONNECTOR_ID_LVDS:
link->connector_signal = SIGNAL_TYPE_LVDS;
break;
default:
DC_LOG_WARNING("Unsupported Connector type:%d!\n",
link->link_id.id);
goto create_fail;
}
LINK_INFO("Connector[%d] description: signal: %s\n",
init_params->connector_index,
signal_type_to_string(link->connector_signal));
ddc_service_init_data.ctx = link->ctx;
ddc_service_init_data.id = link->link_id;
ddc_service_init_data.link = link;
link->ddc = link_create_ddc_service(&ddc_service_init_data);
if (!link->ddc) {
DC_ERROR("Failed to create ddc_service!\n");
goto ddc_create_fail;
}
if (!link->ddc->ddc_pin) {
DC_ERROR("Failed to get I2C info for connector!\n");
goto ddc_create_fail;
}
link->ddc_hw_inst =
dal_ddc_get_line(get_ddc_pin(link->ddc));
enc_init_data.ctx = dc_ctx;
bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0,
&enc_init_data.encoder);
enc_init_data.connector = link->link_id;
enc_init_data.channel = get_ddc_line(link);
enc_init_data.hpd_source = get_hpd_line(link);
link->hpd_src = enc_init_data.hpd_source;
enc_init_data.transmitter =
translate_encoder_to_transmitter(enc_init_data.encoder);
link->link_enc =
link->dc->res_pool->funcs->link_enc_create(dc_ctx, &enc_init_data);
if (!link->link_enc) {
DC_ERROR("Failed to create link encoder!\n");
goto link_enc_create_fail;
}
DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
DC_LOG_DC("BIOS object table - IS_DP2_CAPABLE: %d", link->link_enc->features.flags.bits.IS_DP2_CAPABLE);
/* Update link encoder tracking variables. These are used for the dynamic
* assignment of link encoders to streams.
*/
link->eng_id = link->link_enc->preferred_engine;
link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc;
link->dc->res_pool->dig_link_enc_count++;
link->link_enc_hw_inst = link->link_enc->transmitter;
if (link->dc->res_pool->funcs->panel_cntl_create &&
(link->link_id.id == CONNECTOR_ID_EDP ||
link->link_id.id == CONNECTOR_ID_LVDS)) {
panel_cntl_init_data.ctx = dc_ctx;
panel_cntl_init_data.inst = panel_cntl_init_data.ctx->dc_edp_id_count;
panel_cntl_init_data.eng_id = link->eng_id;
link->panel_cntl =
link->dc->res_pool->funcs->panel_cntl_create(
&panel_cntl_init_data);
panel_cntl_init_data.ctx->dc_edp_id_count++;
if (link->panel_cntl == NULL) {
DC_ERROR("Failed to create link panel_cntl!\n");
goto panel_cntl_create_fail;
}
}
for (i = 0; i < 4; i++) {
if (bp_funcs->get_device_tag(dc_ctx->dc_bios,
link->link_id, i,
&link->device_tag) != BP_RESULT_OK) {
DC_ERROR("Failed to find device tag!\n");
goto device_tag_fail;
}
/* Look for device tag that matches connector signal,
* CRT for rgb, LCD for other supported signal tyes
*/
if (!bp_funcs->is_device_id_supported(dc_ctx->dc_bios,
link->device_tag.dev_id))
continue;
if (link->device_tag.dev_id.device_type == DEVICE_TYPE_CRT &&
link->connector_signal != SIGNAL_TYPE_RGB)
continue;
if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD &&
link->connector_signal == SIGNAL_TYPE_RGB)
continue;
DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device);
DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type);
DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id);
break;
}
if (bios->integrated_info) {
/* Look for channel mapping corresponding to connector and device tag */
for (i = 0; i < MAX_NUMBER_OF_EXT_DISPLAY_PATH; i++) {
struct external_display_path *path =
&bios->integrated_info->ext_disp_conn_info.path[i];
if (path->device_connector_id.enum_id == link->link_id.enum_id &&
path->device_connector_id.id == link->link_id.id &&
path->device_connector_id.type == link->link_id.type) {
if (link->device_tag.acpi_device != 0 &&
path->device_acpi_enum == link->device_tag.acpi_device) {
link->ddi_channel_mapping = path->channel_mapping;
link->chip_caps = path->caps;
DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X",
link->ddi_channel_mapping.raw);
DC_LOG_DC("BIOS object table - chip_caps: %d",
link->chip_caps);
} else if (path->device_tag ==
link->device_tag.dev_id.raw_device_tag) {
link->ddi_channel_mapping = path->channel_mapping;
link->chip_caps = path->caps;
DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X",
link->ddi_channel_mapping.raw);
DC_LOG_DC("BIOS object table - chip_caps: %d",
link->chip_caps);
}
if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) {
link->bios_forced_drive_settings.VOLTAGE_SWING =
(bios->integrated_info->ext_disp_conn_info.fixdpvoltageswing & 0x3);
link->bios_forced_drive_settings.PRE_EMPHASIS =
((bios->integrated_info->ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3);
}
break;
}
}
}
if (bios->funcs->get_atom_dc_golden_table)
bios->funcs->get_atom_dc_golden_table(bios);
/*
* TODO check if GPIO programmed correctly
*
* If GPIO isn't programmed correctly HPD might not rise or drain
* fast enough, leading to bounces.
*/
program_hpd_filter(link);
link->psr_settings.psr_vtotal_control_support = false;
link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
DC_LOG_DC("BIOS object table - %s finished successfully.\n", __func__);
return true;
device_tag_fail:
link->link_enc->funcs->destroy(&link->link_enc);
link_enc_create_fail:
if (link->panel_cntl != NULL)
link->panel_cntl->funcs->destroy(&link->panel_cntl);
panel_cntl_create_fail:
link_destroy_ddc_service(&link->ddc);
ddc_create_fail:
create_fail:
if (link->hpd_gpio) {
dal_gpio_destroy_irq(&link->hpd_gpio);
link->hpd_gpio = NULL;
}
DC_LOG_DC("BIOS object table - %s failed.\n", __func__);
return false;
}
static bool construct_dpia(struct dc_link *link,
const struct link_init_data *init_params)
{
struct ddc_service_init_data ddc_service_init_data = { 0 };
struct dc_context *dc_ctx = init_params->ctx;
DC_LOGGER_INIT(dc_ctx->logger);
/* Initialized irq source for hpd and hpd rx */
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
link->link_status.dpcd_caps = &link->dpcd_caps;
link->dc = init_params->dc;
link->ctx = dc_ctx;
link->link_index = init_params->link_index;
memset(&link->preferred_training_settings, 0,
sizeof(struct dc_link_training_overrides));
memset(&link->preferred_link_setting, 0,
sizeof(struct dc_link_settings));
/* Dummy Init for linkid */
link->link_id.type = OBJECT_TYPE_CONNECTOR;
link->link_id.id = CONNECTOR_ID_DISPLAY_PORT;
link->link_id.enum_id = ENUM_ID_1 + init_params->connector_index;
link->is_internal_display = false;
link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
LINK_INFO("Connector[%d] description:signal %d\n",
init_params->connector_index,
link->connector_signal);
link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA;
link->is_dig_mapping_flexible = true;
/* TODO: Initialize link : funcs->link_init */
ddc_service_init_data.ctx = link->ctx;
ddc_service_init_data.id = link->link_id;
ddc_service_init_data.link = link;
/* Set indicator for dpia link so that ddc wont be created */
ddc_service_init_data.is_dpia_link = true;
link->ddc = link_create_ddc_service(&ddc_service_init_data);
if (!link->ddc) {
DC_ERROR("Failed to create ddc_service!\n");
goto ddc_create_fail;
}
/* Set dpia port index : 0 to number of dpia ports */
link->ddc_hw_inst = init_params->connector_index;
// Assign Dpia preferred eng_id
if (link->dc->res_pool->funcs->get_preferred_eng_id_dpia)
link->dpia_preferred_eng_id = link->dc->res_pool->funcs->get_preferred_eng_id_dpia(link->ddc_hw_inst);
/* TODO: Create link encoder */
link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
/* Some docks seem to NAK I2C writes to segment pointer with mot=0. */
link->wa_flags.dp_mot_reset_segment = true;
return true;
ddc_create_fail:
return false;
}
static bool link_construct(struct dc_link *link,
const struct link_init_data *init_params)
{
/* Handle dpia case */
if (init_params->is_dpia_link == true)
return construct_dpia(link, init_params);
else
return construct_phy(link, init_params);
}
struct dc_link *link_create(const struct link_init_data *init_params)
{
struct dc_link *link =
kzalloc(sizeof(*link), GFP_KERNEL);
if (NULL == link)
goto alloc_fail;
if (false == link_construct(link, init_params))
goto construct_fail;
return link;
construct_fail:
kfree(link);
alloc_fail:
return NULL;
}
void link_destroy(struct dc_link **link)
{
link_destruct(*link);
kfree(*link);
*link = NULL;
}
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