drm/amdgpu/vce4: workaround VCE ring test slow issue

Add VCE ring test slow workaround for SRIOV.
Signed-off-by: Frank Min <Frank.Min@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c

@@ -955,7 +955,11 @@ int amdgpu_vce_ring_test_ring(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	uint32_t rptr = amdgpu_ring_get_rptr(ring);
 	unsigned i;
-	int r;
+	int r, timeout = adev->usec_timeout;
+
+	/* workaround VCE ring test slow issue for sriov*/
+	if (amdgpu_sriov_vf(adev))
+		timeout *= 10;
 
 	/* TODO: remove it if VCE can work for sriov */
 	if (amdgpu_sriov_vf(adev))
@@ -970,13 +974,13 @@ int amdgpu_vce_ring_test_ring(struct amdgpu_ring *ring)
 	amdgpu_ring_write(ring, VCE_CMD_END);
 	amdgpu_ring_commit(ring);
 
-	for (i = 0; i < adev->usec_timeout; i++) {
+	for (i = 0; i < timeout; i++) {
 		if (amdgpu_ring_get_rptr(ring) != rptr)
 			break;
 		DRM_UDELAY(1);
 	}
 
-	if (i < adev->usec_timeout) {
+	if (i < timeout) {
 		DRM_INFO("ring test on %d succeeded in %d usecs\n",
 			 ring->idx, i);
 	} else {