drm/radeon/dpm: enable dynamic vce state switching v2

enable vce states when vce is active.  When vce is active,
it adjusts the currently selected state (performance, battery,
uvd, etc.)

v2: add code comments

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>

drivers/gpu/drm/radeon/radeon_cs.c

@@ -347,6 +347,9 @@ static int radeon_cs_ib_chunk(struct radeon_device *rdev,
 
 	if (parser->ring == R600_RING_TYPE_UVD_INDEX)
 		radeon_uvd_note_usage(rdev);
+	else if ((parser->ring == TN_RING_TYPE_VCE1_INDEX) ||
+		 (parser->ring == TN_RING_TYPE_VCE2_INDEX))
+		radeon_vce_note_usage(rdev);
 
 	radeon_cs_sync_rings(parser);
 	r = radeon_ib_schedule(rdev, &parser->ib, NULL);