1 /*
2  *  linux/drivers/video/fb_cmdline.c
3  *
4  *  Copyright (C) 2014 Intel Corp
5  *  Copyright (C) 1994 Martin Schaller
6  *
7  *	2001 - Documented with DocBook
8  *	- Brad Douglas <brad@neruo.com>
9  *
10  * This file is subject to the terms and conditions of the GNU General Public
11  * License.  See the file COPYING in the main directory of this archive
12  * for more details.
13  *
14  * Authors:
15  *    Daniel Vetter <daniel.vetter@ffwll.ch>
16  */
17 
18 #include <linux/export.h>
19 #include <linux/fb.h>
20 #include <linux/string.h>
21 
22 #include <video/cmdline.h>
23 
24 /**
25  * fb_get_options - get kernel boot parameters
26  * @name:   framebuffer name as it would appear in
27  *          the boot parameter line
28  *          (video=<name>:<options>)
29  * @option: the option will be stored here
30  *
31  * The caller owns the string returned in @option and is
32  * responsible for releasing the memory.
33  *
34  * NOTE: Needed to maintain backwards compatibility
35  */
36 int fb_get_options(const char *name, char **option)
37 {
38 	const char *options = NULL;
39 	bool is_of = false;
40 	bool enabled;
41 
42 	if (name)
43 		is_of = strncmp(name, "offb", 4);
44 
45 	enabled = __video_get_options(name, &options, is_of);
46 
47 	if (options) {
48 		if (!strncmp(options, "off", 3))
49 			enabled = false;
50 	}
51 
52 	if (option) {
53 		if (options)
54 			*option = kstrdup(options, GFP_KERNEL);
55 		else
56 			*option = NULL;
57 	}
58 
59 	return enabled ? 0 : 1; // 0 on success, 1 otherwise
60 }
61 EXPORT_SYMBOL(fb_get_options);
62