drm/amdgpu: Skip access GRBM_CNTL under SRIOV on gfx_v11

[Why]
GRBM_CNTL is a PF_only register on gfx_v11.
RLCG interface will return "out of range" under SRIOV VF.

[How]
Skip access GRBM_CNTL under gfx_v11 SRIOV VF.

Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index 443ce66..f68e13b 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -1626,7 +1626,8 @@ static void gfx_v11_0_constants_init(struct amdgpu_device *adev)
        u32 tmp;
        int i;
 
-       WREG32_FIELD15_PREREG(GC, 0, GRBM_CNTL, READ_TIMEOUT, 0xff);
+       if (!amdgpu_sriov_vf(adev))
+               WREG32_FIELD15_PREREG(GC, 0, GRBM_CNTL, READ_TIMEOUT, 0xff);
 
        gfx_v11_0_setup_rb(adev);
        gfx_v11_0_get_cu_info(adev, &adev->gfx.cu_info);