+ case DMX_GET_CAPS:
+ if (!dmxdev->demux->get_caps) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
+ break;
+
+ case DMX_SET_SOURCE:
+ if (!dmxdev->demux->set_source) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = dmxdev->demux->set_source(dmxdev->demux, parg);
+ break;
+