try_fmt 507 drivers/media/i2c/sr030pc30.c static const struct sr030pc30_format *try_fmt(struct v4l2_subdev *sd, try_fmt 233 drivers/media/pci/bt8xx/bttv-vbi.c static int try_fmt(struct v4l2_vbi_format *f, const struct bttv_tvnorm *tvnorm,