For ASICs which don't supoort clock gating, querying CG status
may cause a hardware hang issue. So add a CG flag check to exit
directly in such a case.
Signed-off-by: Lang Yu <lang.yu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index b1d2dc39e8be..a7afcdc50ca8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1671,6 +1671,11 @@ void amdgpu_device_ip_get_clockgating_state(struct amdgpu_device *adev,
{
int i;
+ if (!adev->cg_flags) {
+ *flags = 0;
+ return;
+ }
+
for (i = 0; i < adev->num_ip_blocks; i++) {
if (!adev->ip_blocks[i].status.valid)
continue;
--
2.25.1
