MT9M111_MIN_DARK_ROWS
mt9m111->rect.top = MT9M111_MIN_DARK_ROWS;
rect.top = clamp(rect.top, MT9M111_MIN_DARK_ROWS,
MT9M111_MIN_DARK_ROWS + MT9M111_MAX_HEIGHT -
sel->r.top = MT9M111_MIN_DARK_ROWS;