linux/arch/x86/boot/video-mode.c

// SPDX-License-Identifier: GPL-2.0-only
/* -*- linux-c -*- ------------------------------------------------------- *
 *
 *   Copyright (C) 1991, 1992 Linus Torvalds
 *   Copyright 2007-2008 rPath, Inc. - All Rights Reserved
 *
 * ----------------------------------------------------------------------- */

/*
 * arch/i386/boot/video-mode.c
 *
 * Set the video mode.  This is separated out into a different
 * file in order to be shared with the ACPI wakeup code.
 */

#include "boot.h"
#include "video.h"
#include "vesa.h"

#include <uapi/asm/boot.h>

/*
 * Common variables
 */
int adapter;		/* 0=CGA/MDA/HGC, 1=EGA, 2=VGA+ */
int force_x, force_y;	/* Don't query the BIOS for cols/rows */
int do_restore;		/* Screen contents changed during mode flip */
int graphic_mode;	/* Graphic mode with linear frame buffer */

/* Probe the video drivers and have them generate their mode lists. */
void probe_cards(int unsafe)
{ … }

/* Test if a mode is defined */
int mode_defined(u16 mode)
{ … }

/* Set mode (without recalc) */
static int raw_set_mode(u16 mode, u16 *real_mode)
{ … }

/*
 * Recalculate the vertical video cutoff (hack!)
 */
static void vga_recalc_vertical(void)
{ … }

/* Set mode (with recalc if specified) */
int set_mode(u16 mode)
{ … }