mlx_print_phys_drv
mlx_print_phys_drv(drv, chn, targ, "# ", 1);
mlx_print_phys_drv(&pd, channel, target, " ", verbosity - 1);
extern void mlx_print_phys_drv(struct mlx_phys_drv *drv, int channel, int target, const char *prefix, int verbose);