[PATCH v4 2/7] drm/amdgpu/vcn : Skip vcn power-gating change for sriov

[Samir Dhume]

Signed-off-by: Samir Dhume <samir.dh...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c 
b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
index 550ac040b4be..411c1d802823 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
@@ -1317,6 +1317,15 @@ static int vcn_v4_0_3_set_powergating_state(void *handle,
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int ret;
 
+       /* for SRIOV, guest should not control VCN Power-gating
+        * MMSCH FW should control Power-gating and clock-gating
+        * guest should avoid touching CGC and PG
+        */
+       if (amdgpu_sriov_vf(adev)) {
+               adev->vcn.cur_state = AMD_PG_STATE_UNGATE;
+               return 0;
+       }
+
        if (state == adev->vcn.cur_state)
                return 0;
 
-- 
2.34.1