From bcb67ed3c51cf83716247bbe26d5477e2cbe1f84 Mon Sep 17 00:00:00 2001
From: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Date: Fri, 16 Dec 2022 17:25:01 -0600
Subject: soc/amd/mendocino: Add support for selective GOP driver init

Add support for the selective GOP init feature by only running the FSP
GOP driver when necessary: if the FMAP cache is invalid, or if the
board is booted in either recovery or developer mode.

BUG=b:255812886
TEST=tested with rest of patch train

Change-Id: I7ddadc254e05aca0fdd7a9567160a9329cb0e15c
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70899
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
---
 src/soc/amd/mendocino/fsp_s_params.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/soc/amd/mendocino/fsp_s_params.c b/src/soc/amd/mendocino/fsp_s_params.c
index 3f7aa9f854..6551e202c7 100644
--- a/src/soc/amd/mendocino/fsp_s_params.c
+++ b/src/soc/amd/mendocino/fsp_s_params.c
@@ -4,12 +4,23 @@
 
 #include <acpi/acpi.h>
 #include <amdblocks/apob_cache.h>
+#include <amdblocks/vbios_cache.h>
+#include <console/console.h>
 #include <device/pci.h>
 #include <fsp/api.h>
 #include <program_loading.h>
+#include <security/vboot/vboot_common.h>
 
 static void fsp_assign_vbios_upds(FSP_S_CONFIG *scfg)
 {
+	if (CONFIG(USE_SELECTIVE_GOP_INIT) && vbios_cache_is_valid()) {
+		if (!vboot_recovery_mode_enabled() && !vboot_developer_mode_enabled()) {
+			scfg->vbios_buffer = 0;
+			printk(BIOS_SPEW, "%s: using VBIOS cache; skipping GOP driver.\n", __func__);
+			return;
+		}
+	}
+	printk(BIOS_SPEW, "%s: not using VBIOS cache; running GOP driver.\n", __func__);
 	scfg->vbios_buffer = CONFIG(RUN_FSP_GOP) ? PCI_VGA_RAM_IMAGE_START : 0;
 }
 
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