I2S_DMALIST_MAX
sc->sc_idbdma = dbdma_alloc(sc->sc_dmat, I2S_DMALIST_MAX);
if (size > I2S_DMALIST_MAX * I2S_DMASEG_MAX)
sc->sc_odbdma = dbdma_alloc(sc->sc_dmat, I2S_DMALIST_MAX);
bus_dma_segment_t segs[I2S_DMALIST_MAX];