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drm/amdgpu: Avoid fetching vram vendor information

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For GFX 9.4.3 APUs, the current method of fetching vram vendor
information is not reliable. Avoid fetching the information.

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>
Cc: stable@vger.kernel.org # 6.7.x
This commit is contained in:
Lijo Lazar
2024-01-20 13:32:51 +05:30
committed by Alex Deucher
parent ca1ffb174f
commit 90751bdeee
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
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@@ -1950,7 +1950,8 @@ static void gmc_v9_4_3_init_vram_info(struct amdgpu_device *adev)
static const u32 regBIF_BIOS_SCRATCH_4 = 0x50;
u32 vram_info;
if (!amdgpu_sriov_vf(adev)) {
/* Only for dGPU, vendor informaton is reliable */
if (!amdgpu_sriov_vf(adev) && !(adev->flags & AMD_IS_APU)) {
vram_info = RREG32(regBIF_BIOS_SCRATCH_4);
adev->gmc.vram_vendor = vram_info & 0xF;
}