62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
|
|
* linux/drivers/video/fb_cmdline.c
|
|
*
|
|
* Copyright (C) 2014 Intel Corp
|
|
* Copyright (C) 1994 Martin Schaller
|
|
*
|
|
* 2001 - Documented with DocBook
|
|
* - Brad Douglas <brad@neruo.com>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Authors:
|
|
* Daniel Vetter <daniel.vetter@ffwll.ch>
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <video/cmdline.h>
|
|
|
|
/**
|
|
* fb_get_options - get kernel boot parameters
|
|
* @name: framebuffer name as it would appear in
|
|
* the boot parameter line
|
|
* (video=<name>:<options>)
|
|
* @option: the option will be stored here
|
|
*
|
|
* The caller owns the string returned in @option and is
|
|
* responsible for releasing the memory.
|
|
*
|
|
* NOTE: Needed to maintain backwards compatibility
|
|
*/
|
|
int fb_get_options(const char *name, char **option)
|
|
{
|
|
const char *options = NULL;
|
|
bool is_of = false;
|
|
bool enabled;
|
|
|
|
if (name)
|
|
is_of = strncmp(name, "offb", 4);
|
|
|
|
enabled = __video_get_options(name, &options, is_of);
|
|
|
|
if (options) {
|
|
if (!strncmp(options, "off", 3))
|
|
enabled = false;
|
|
}
|
|
|
|
if (option) {
|
|
if (options)
|
|
*option = kstrdup(options, GFP_KERNEL);
|
|
else
|
|
*option = NULL;
|
|
}
|
|
|
|
return enabled ? 0 : 1; // 0 on success, 1 otherwise
|
|
}
|
|
EXPORT_SYMBOL(fb_get_options);
|