[PATCH] drm/amdgpu: Avoid fetching VRAM vendor info

[Alex Deucher]

On Fri, Feb 2, 2024 at 10:53 AM Lijo Lazar <lijo.lazar at amd.com> wrote:
>
> 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 at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 8 --------
>  1 file changed, 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> index a3a11538207b..c1161f465b37 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> @@ -1949,14 +1949,6 @@ 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;
>  }
> --
> 2.25.1
>