int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr, struct mixart_msg *request, u32 notif_event);
int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request);
int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr, struct mixart_msg *request, u32 notif_event);
int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request);