snd_bcm2835_route
int idx, enum snd_bcm2835_route route,
enum snd_bcm2835_route route, u32 numchannels);
enum snd_bcm2835_route route;
enum snd_bcm2835_route route,
enum snd_bcm2835_route route,
int idx, enum snd_bcm2835_route route,