drm/amdgpu: Avoid fetching VRAM vendor info

The present way to fetch VRAM vendor information turns out to be not
reliable on GFX 9.4.3 dGPUs as well. Avoid using the data.

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

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 40a00ea0009f6aca367c68a43e11ae608f71d416..e67a62db9e12629b40c92f322922cc763ce53ce7 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1947,14 +1947,6 @@ static int gmc_v9_0_init_mem_ranges(struct amdgpu_device *adev)
 
 static void gmc_v9_4_3_init_vram_info(struct amdgpu_device *adev)
 {
-       static const u32 regBIF_BIOS_SCRATCH_4 = 0x50;
-       u32 vram_info;
-
-       /* 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;
-       }
        adev->gmc.vram_type = AMDGPU_VRAM_TYPE_HBM;
        adev->gmc.vram_width = 128 * 64;
 }