From: Lijo Lazar <lijo.lazar@amd.com>
Date: Wed, 29 Apr 2026 10:04:57 +0000 (+0530)
Subject: drm/amdgpu: Prefer ROM BAR for default VGA device
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=9e32d17592950478baffaecdbda8e2e60935fd3d;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu: Prefer ROM BAR for default VGA device

Fetching from platform ROM doesn't work with hybrid ROM images. For
default VGA devices also prefer ROM BAR.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
index 35d04e69aec0..aa039e148a5e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -33,6 +33,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/acpi.h>
+#include <linux/vgaarb.h>
 /*
  * BIOS.
  */
@@ -467,7 +468,8 @@ static bool amdgpu_prefer_rom_resource(struct amdgpu_device *adev)
 {
 	struct resource *res = &adev->pdev->resource[PCI_ROM_RESOURCE];
 
-	return (res->flags & IORESOURCE_ROM_SHADOW);
+	return (res->flags & IORESOURCE_ROM_SHADOW) ||
+	       adev->pdev == vga_default_device();
 }
 
 static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)