amixer_set_x
hw->amixer_set_x(amixer->rsc.ctrl_blk,
hw->amixer_set_x(amixer->rsc.ctrl_blk, BLANK_SLOT);
hw->amixer_set_x(amixer->rsc.ctrl_blk,
int (*amixer_set_x)(void *blk, unsigned int x);
.amixer_set_x = amixer_set_x,
.amixer_set_x = amixer_set_x,