amdgpu: detect if we are using atomfirmware or atombios for vbios (v2)
Supposedly atomfirmware rom header is 3.3 atombios is 1.1.
v2: rebased on newer kernel
Acked-by: Christian König <christian.koenig@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 821f7cc..365e735 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -86,6 +86,18 @@ static bool check_atom_bios(uint8_t *bios, size_t size)
return false;
}
+static bool is_atom_fw(uint8_t *bios)
+{
+ uint16_t bios_header_start = bios[0x48] | (bios[0x49] << 8);
+ uint8_t frev = bios[bios_header_start + 2];
+ uint8_t crev = bios[bios_header_start + 3];
+
+ if ((frev < 3) ||
+ ((frev == 3) && (crev < 3)))
+ return false;
+
+ return true;
+}
/* If you boot an IGP board with a discrete card as the primary,
* the IGP rom is not accessible via the rom bar as the IGP rom is
@@ -419,26 +431,30 @@ static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
bool amdgpu_get_bios(struct amdgpu_device *adev)
{
if (amdgpu_atrm_get_bios(adev))
- return true;
+ goto success;
if (amdgpu_acpi_vfct_bios(adev))
- return true;
+ goto success;
if (igp_read_bios_from_vram(adev))
- return true;
+ goto success;
if (amdgpu_read_bios(adev))
- return true;
+ goto success;
if (amdgpu_read_bios_from_rom(adev))
- return true;
+ goto success;
if (amdgpu_read_disabled_bios(adev))
- return true;
+ goto success;
if (amdgpu_read_platform_bios(adev))
- return true;
+ goto success;
DRM_ERROR("Unable to locate a BIOS ROM\n");
return false;
+
+success:
+ adev->is_atom_fw = is_atom_fw(adev->bios);
+ return true;
}