mb/amd/bilby: Add support for HDMI display

DDI 0/1 ports are shared for DP and HDMI. This implementation
adds support for HDMI display when HDMI is set as connector type
in ddi descriptors.

TEST=verify display over HDMI(0 and 1) in OS.

Signed-off-by: Aamir Bohra <aamirbohra@gmail.com>
Change-Id: I9697211c556f12d1fc0d49418b227fbe6b342673
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56756
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/amd/bilby/Kconfig

@@ -106,4 +106,36 @@ config EFS_SPI_MICRON_FLAG
 	int
 	default 0
 
+choice
+	prompt "DDI-0 connector type"
+	default CONNECT_DP_ON_DDI_0
+
+config CONNECT_HDMI_ON_DDI_0
+	bool "Use HDMI interface"
+
+config CONNECT_DP_ON_DDI_0
+	bool "Use Displayport interface"
+endchoice
+
+config DDI0_CONNECTOR_TYPE
+	int
+	default 0 if CONNECT_DP_ON_DDI_0
+	default 4 if CONNECT_HDMI_ON_DDI_0
+
+choice
+	prompt "DDI-1 connector type"
+	default CONNECT_DP_ON_DDI_1
+
+config CONNECT_HDMI_ON_DDI_1
+	bool "Use HDMI interface"
+
+config CONNECT_DP_ON_DDI_1
+	bool "Use Displayport interface"
+endchoice
+
+config DDI1_CONNECTOR_TYPE
+	int
+	default 0 if CONNECT_DP_ON_DDI_1
+	default 4 if CONNECT_HDMI_ON_DDI_1
+
 endif # BOARD_AMD_BILBY

src/mainboard/amd/bilby/gpio.c

@@ -17,8 +17,6 @@ static const struct soc_amd_gpio gpio_set_stage_ram[] = {
 	PAD_GPI(GPIO_11, PULL_UP),
 	/* APU_ALS_INT# */
 	PAD_SCI(GPIO_24, PULL_UP, EDGE_LOW),
-	/* SD card detect */
-	PAD_GPI(GPIO_31, PULL_UP),
 	/* NFC IRQ */
 	PAD_INT(GPIO_69, PULL_UP, EDGE_LOW, STATUS),
 };

src/mainboard/amd/bilby/mainboard.c

@@ -5,13 +5,18 @@
 #include <acpi/acpi.h>
 #include <amdblocks/amd_pci_util.h>
 #include <FspsUpd.h>
+#include <gpio.h>
 #include <soc/cpu.h>
 #include <soc/southbridge.h>
 #include <soc/pci_devs.h>
+#include <soc/platform_descriptors.h>
 #include <types.h>
 #include <commonlib/helpers.h>
 #include <chip.h>
 #include "gpio.h"
+#include "mainboard.h"
+
+#define MAINBOARD_SHARED_DDI_PORTS 2
 
 /* TODO: recheck IRQ tables */
 
@@ -79,6 +84,22 @@ static void pirq_setup(void)
 	picr_data_ptr = fch_pic_routing;
 }
 
+static void program_display_sel_gpios(void)
+{
+	int idx, port_type;
+	gpio_t display_sel[MAINBOARD_SHARED_DDI_PORTS] = {GPIO_29, GPIO_31};
+
+	for (idx = 0; idx < MAINBOARD_SHARED_DDI_PORTS; idx++) {
+		port_type = get_ddi_port_conn_type(idx);
+
+		if (port_type == HDMI)
+			gpio_output(display_sel[idx], 0);
+		else if (port_type == DP)
+			gpio_output(display_sel[idx], 1);
+	}
+
+}
+
 static void mainboard_init(void *chip_info)
 {
 	struct soc_amd_picasso_config *cfg = config_of_soc();
@@ -88,6 +109,8 @@ static void mainboard_init(void *chip_info)
 
 	mainboard_program_gpios();
 
+	program_display_sel_gpios();
+
 	/* Re-muxing LPCCLK0 can hang the system if LPC is in use. */
 	if (CONFIG(BILBY_LPC))
 		printk(BIOS_INFO, "eMMC not available due to LPC requirement\n");

src/mainboard/amd/bilby/mainboard.h

@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+int get_ddi_port_conn_type(uint8_t port_num);

src/mainboard/amd/bilby/port_descriptors.c

@@ -2,6 +2,7 @@
 
 #include <soc/platform_descriptors.h>
 #include <types.h>
+#include "mainboard.h"
 
 static const fsp_dxio_descriptor pco_dxio_descriptors[] = {
 	{ /* MXM - Entry 0 */
@@ -47,12 +48,12 @@ static const fsp_dxio_descriptor pco_dxio_descriptors[] = {
 
 static const fsp_ddi_descriptor pco_ddi_descriptors[] = {
 	{ /* DDI0 - DP */
-		.connector_type = DP,
+		.connector_type = CONFIG_DDI0_CONNECTOR_TYPE,
 		.aux_index = AUX1,
 		.hdp_index = HDP1
 	},
 	{ /* DDI1 - DP */
-		.connector_type = DP,
+		.connector_type = CONFIG_DDI1_CONNECTOR_TYPE,
 		.aux_index = AUX2,
 		.hdp_index = HDP2
 	},
@@ -68,6 +69,11 @@ static const fsp_ddi_descriptor pco_ddi_descriptors[] = {
 	}
 };
 
+int get_ddi_port_conn_type(uint8_t port_num)
+{
+	return pco_ddi_descriptors[port_num].connector_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)