[PATCH] drm/amdgpu/vcn: set VCN5 power gating state to GATE on suspend

[David (Ming Qiang) Wu]

On suspend, we need to set power gating state to GATE when
VCN5 is busy, otherwise we will get following error on resume:

[drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring vcn_unified_0 test failed (-110)
[drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of IP block <vcn_v5_0_0> failed -110
amdgpu: amdgpu_device_ip_resume failed (-110).
PM: dpm_run_callback(): pci_pm_resume+0x0/0x100 returns -110
PM: failed to resume async: error -110

Signed-off-by: David (Ming Qiang) Wu <David.Wu3 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c
index 9b87d6a49b39..36d4ca645c56 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c
@@ -229,6 +229,13 @@ static int vcn_v5_0_0_hw_fini(void *handle)
 	for (i = 0; i < adev->vcn.num_vcn_inst; ++i) {
 		if (adev->vcn.harvest_config & (1 << i))
 			continue;
+		if (!amdgpu_sriov_vf(adev)) {
+			if ((adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) ||
+				(adev->vcn.cur_state != AMD_PG_STATE_GATE &&
+				RREG32_SOC15(VCN, i, regUVD_STATUS))) {
+				vcn_v5_0_0_set_powergating_state(adev, AMD_PG_STATE_GATE);
+			}
+		}
 	}
 
 	return 0;
-- 
2.34.1