From: Lang Yu Lang.Yu@amd.com
commit bca52455a3c07922ee976714b00563a13a29ab15 upstream.
We observed a GPU hang when querying GMC CG state(i.e., cat amdgpu_pm_info) on cyan skillfish. Acctually, cyan skillfish doesn't support any CG features.
Just prevent it from accessing GMC CG registers.
Signed-off-by: Lang Yu Lang.Yu@amd.com Reviewed-by: Lijo Lazar lijo.lazar@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 --- drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c @@ -1147,6 +1147,9 @@ static void gmc_v10_0_get_clockgating_st { struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(10, 1, 3)) + return; + adev->mmhub.funcs->get_clockgating(adev, flags);
if (adev->ip_versions[ATHUB_HWIP][0] >= IP_VERSION(2, 1, 0))