| /* | |
| * 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); |