mb/prodrive/hermes: Add VBT for Avalanche systems

The Hermes mainboard is used in different system configurations. The
current VBT for Poseidon systems is unsuitable for Avalanche systems
because display ports are connected differently.

Add a new field in the BMC config EEPROM layout and use it to choose
the correct VBT for every system configuration.

Change-Id: I2647f2ae3f496b9ad75980ba86beb7800fdb0668
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59838
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/prodrive/hermes/Makefile.inc

@@ -10,3 +10,5 @@ ramstage-y += ramstage.c
 ramstage-y += mainboard.c
 ramstage-y += eeprom.c
 ramstage-y += smbios.c
+
+$(call add_vbt_to_cbfs, vbt-avalanche.bin, avalanche-data.vbt)

src/mainboard/prodrive/hermes/eeprom.h

@@ -63,6 +63,7 @@ _Static_assert(sizeof(struct eeprom_board_settings) == (10 + sizeof(uint32_t)),
 struct __packed eeprom_bmc_settings {
 	uint8_t pcie_mux;
 	uint8_t hsi;
+	uint8_t efp3_displayport;
 };
 
 #define HERMES_SERIAL_NUMBER_LENGTH	32

src/mainboard/prodrive/hermes/mainboard.c

@@ -8,6 +8,7 @@
 #include <crc_byte.h>
 #include <device/device.h>
 #include <device/dram/spd.h>
+#include <drivers/intel/gma/opregion.h>
 #include <gpio.h>
 #include <intelblocks/gpio.h>
 #include <intelblocks/pmclib.h>
@@ -18,6 +19,16 @@
 #include "eeprom.h"
 #include "gpio.h"
 
+const char *mainboard_vbt_filename(void)
+{
+	const struct eeprom_bmc_settings *bmc_cfg = get_bmc_settings();
+
+	if (bmc_cfg && bmc_cfg->efp3_displayport)
+		return "vbt-avalanche.bin";
+	else
+		return "vbt.bin"; /* Poseidon */
+}
+
 /* FIXME: Example code below */
 
 static void mb_configure_dp1_pwr(bool enable)