port_descriptors.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/i2c_simple.h>
#include <soc/gpio.h>
#include <soc/platform_descriptors.h>
#include <types.h>
 
static const fsp_dxio_descriptor chausie_dxio_descriptors[] = {
        { /* GBE*/
                .engine_type = PCIE_ENGINE,
                .port_present = true,
                .start_logical_lane = 0,
                .end_logical_lane = 0,
                .device_number = 2,
                .function_number = 1,
                .link_speed_capability = GEN3,
                .turn_off_unused_lanes = true,
                .link_aspm = 2,
                .link_hotplug = 3,
                .clk_req = CLK_REQ3,
        },
        { /* WIFI */
                .engine_type = PCIE_ENGINE,
                .port_present = true,
                .start_logical_lane = 1,
                .end_logical_lane = 1,
                .device_number = 2,
                .function_number = 2,
                .link_speed_capability = GEN3,
                .turn_off_unused_lanes = true,
                .link_aspm = 2,
                .link_hotplug = 3,
                .clk_req = CLK_REQ1,
        },
        { /* NVMe SSD */
                .engine_type = PCIE_ENGINE,
                .port_present = true,
                .start_logical_lane = 2,
                .end_logical_lane = 3,
                .device_number = 2,
                .function_number = 3,
                .link_speed_capability = GEN3,
                .turn_off_unused_lanes = true,
                .link_aspm = 2,
                .link_hotplug = 3,
                .gpio_group_id = GPIO_27,
                .clk_req = CLK_REQ0,
        },
};
 
static fsp_ddi_descriptor chausie_ddi_descriptors[] = {
        { /* DDI0 - eDP */
                .connector_type = DDI_EDP,
                .aux_index = DDI_AUX1,
                .hdp_index = DDI_HDP1
        },
        { /* DDI1 - HDMI/DP */
                .connector_type = DDI_HDMI,
                .aux_index = DDI_AUX2,
                .hdp_index = DDI_HDP2
        },
        { /* DDI2 - DP (type C) */
                .connector_type = DDI_DP,
                .aux_index = DDI_AUX3,
                .hdp_index = DDI_HDP3,
        },
        { /* DDI3 - DP (type C) */
                .connector_type = DDI_DP,
                .aux_index = DDI_AUX4,
                .hdp_index = DDI_HDP4,
        },
        { /* DDI4 - unused */
                .connector_type = DDI_UNUSED_TYPE,
                .aux_index = DDI_AUX5,
                .hdp_index = DDI_HDP5,
        }
};
 
static uint8_t get_ddi1_type(void)
{
        const uint8_t eeprom_i2c_bus = 2;
        const uint8_t eeprom_i2c_address = 0x55;
        const uint16_t eeprom_connector_type_offset = 2;
        uint8_t eeprom_connector_type_data[2];
        uint16_t connector_type;
 
        if (i2c_2ba_read_bytes(eeprom_i2c_bus, eeprom_i2c_address,
                               eeprom_connector_type_offset, eeprom_connector_type_data,
                               sizeof(eeprom_connector_type_data))) {
                printk(BIOS_NOTICE,
                       "Display connector type couldn't be determined. Disabling DDI1.\n");
                return DDI_UNUSED_TYPE;
        }
 
        connector_type = eeprom_connector_type_data[1] | eeprom_connector_type_data[0] << 8;
 
        switch (connector_type) {
        case 0xc:
                printk(BIOS_DEBUG, "Configuring DDI1 as HDMI.\n");
                return DDI_HDMI;
                break;
        case 0x13:
                printk(BIOS_DEBUG, "Configuring DDI1 as DP.\n");
                return DDI_DP;
                break;
        case 0x14:
                printk(BIOS_DEBUG, "Configuring DDI1 as eDP.\n");
                return DDI_EDP;
                break;
        default:
                printk(BIOS_WARNING, "Unexpected display connector type %x. Disabling DDI1.\n",
                       connector_type);
                return DDI_UNUSED_TYPE;
        }
}
 
void mainboard_get_dxio_ddi_descriptors(
                const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num,
                const fsp_ddi_descriptor **ddi_descs, size_t *ddi_num)
{
        chausie_ddi_descriptors[1].connector_type = get_ddi1_type();
 
        *dxio_descs = chausie_dxio_descriptors;
        *dxio_num = ARRAY_SIZE(chausie_dxio_descriptors);
        *ddi_descs = chausie_ddi_descriptors;
        *ddi_num = ARRAY_SIZE(chausie_ddi_descriptors);
}