drm/amdgpu: Avoid fetching VRAM vendor info

commit 55173942a63668bdc1d61812c7c9e0406aefb5bf upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index ad91329f227df0e2b06b724c6610bf595877f9e7..ced2e1bdccb7a156aa330f49474f940a9cc7bd7a 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;
 }