diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
index e3cf8e49d3364ca2871243928bea69242da4305f..aaa3662ca63a1d0b5f79a6def015960b47d8c3a4 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
@@ -702,6 +702,7 @@ static int uvd_v7_0_mmsch_start(struct amdgpu_device *adev,
 		dev_err(adev->dev, "failed to init MMSCH, mmVCE_MMSCH_VF_MAILBOX_RESP = %x\n", data);
 		return -EBUSY;
 	}
+	WDOORBELL32(adev->uvd.ring_enc[0].doorbell_index, 0);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c b/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
index a7af08a353424eba90f170a815b5012189d5187e..77f1b60ab4165a043ed2a039f0707c910c09d488 100644
--- a/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
@@ -190,6 +190,7 @@ static int vce_v4_0_mmsch_start(struct amdgpu_device *adev,
 		dev_err(adev->dev, "failed to init MMSCH, mmVCE_MMSCH_VF_MAILBOX_RESP = %x\n", data);
 		return -EBUSY;
 	}
+	WDOORBELL32(adev->vce.ring[0].doorbell_index, 0);
 
 	return 0;
 }