ICE1712_DSC_CONTROL
tmp = snd_ice1712_ds_read(ice, substream->number * 2, ICE1712_DSC_CONTROL);
snd_ice1712_ds_write(ice, substream->number * 2, ICE1712_DSC_CONTROL, tmp);
snd_ice1712_ds_write(ice, chn, ICE1712_DSC_CONTROL, tmp);
if (!(snd_ice1712_ds_read(ice, substream->number * 2, ICE1712_DSC_CONTROL) & 1))