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