pvr2_hdw_get_input_available
mmsk = pvr2_hdw_get_input_available(hdw);
mmsk = pvr2_hdw_get_input_available(hdw);
unsigned int pvr2_hdw_get_input_available(struct pvr2_hdw *);
if (pvr2_hdw_get_input_available(vp->channel.mc_head->hdw) &
input_mask &= pvr2_hdw_get_input_available(hdw);