HDAC_RIRBWP
HDAC_WRITE_2(&sc->mem, HDAC_RIRBWP, HDAC_RIRBWP_RIRBWPRST);
rirbwp = HDAC_READ_1(&sc->mem, HDAC_RIRBWP);
hda_set_reg_by_offset(sc, HDAC_RIRBWP, rirb->wp);
rirb->wp = hda_get_reg_by_offset(sc, HDAC_RIRBWP);