src_set_state
int (*src_set_state)(void *blk, unsigned int state);
.src_set_state = src_set_state,
.src_set_state = src_set_state,
hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
.set_state = src_set_state,
hw->src_set_state(src->rsc.ctrl_blk, state);