pvr2_ctrl_get_def
int pvr2_ctrl_get_def(struct pvr2_ctrl *, int *valptr);
ret = pvr2_ctrl_get_def(cip->cptr, &val);
pvr2_ctrl_get_def(hcp, &ldef);
pvr2_ctrl_get_def(vcp, &ldef);
pvr2_ctrl_get_def(cptr, &val);
pvr2_ctrl_get_def(cptr, &val);