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drm/amdgpu: Prefer shadow rom when available

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commit 27145f78f56a3178c4f9ffe51c4406d8dd0ca90c upstream.

Fetch VBIOS from shadow ROM when available before trying other methods
like EFI method.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Fixes: 9c081c11c6 ("drm/amdgpu: Reorder to read EFI exported ROM first")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4066
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lijo Lazar
2025-03-25 11:42:08 +05:30
committed by Greg Kroah-Hartman
parent 68b591d64d
commit 531d463364
1 changed files with 27 additions and 7 deletions
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34
drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
View File

@@ -437,6 +437,13 @@ success:
return true;
}
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);
}
static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)
{
if (amdgpu_atrm_get_bios(adev)) {
@@ -455,14 +462,27 @@ static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)
goto success;
}
if (amdgpu_read_platform_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from platform\n");
goto success;
}
if (amdgpu_prefer_rom_resource(adev)) {
if (amdgpu_read_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
goto success;
}
if (amdgpu_read_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
goto success;
if (amdgpu_read_platform_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from platform\n");
goto success;
}
} else {
if (amdgpu_read_platform_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from platform\n");
goto success;
}
if (amdgpu_read_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
goto success;
}
}
if (amdgpu_read_bios_from_rom(adev)) {