1 files changed, 130 insertions, 0 deletions
diff --git a/src/mainboard/amd/birman/port_descriptors.c b/src/mainboard/amd/birman/port_descriptors.c
new file mode 100644
index 000000000000..f2ed5c54fe80
--- /dev/null
+++ b/src/mainboard/amd/birman/port_descriptors.c
@@ -0,0 +1,130 @@
+/* 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>
+
+/* TODO: Update for birman */
+
+static const fsp_dxio_descriptor birman_dxio_descriptors[] = {
+	{
+		.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,
+	},
+	{
+		.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,
+	},
+	{
+		.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 birman_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)
+{
+	birman_ddi_descriptors[1].connector_type = get_ddi1_type();
+
+	*dxio_descs = birman_dxio_descriptors;
+	*dxio_num = ARRAY_SIZE(birman_dxio_descriptors);
+	*ddi_descs = birman_ddi_descriptors;
+	*ddi_num = ARRAY_SIZE(birman_ddi_descriptors);
+}