// SPDX-License-Identifier: GPL-2.0 /* * Based on the fbdev code in drivers/video/fbdev/core/fb_cmdline: * * Copyright (C) 2014 Intel Corp * Copyright (C) 1994 Martin Schaller * * 2001 - Documented with DocBook * - Brad Douglas <[email protected]> * * 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 <[email protected]> */ #include <linux/fb.h> /* for FB_MAX */ #include <linux/init.h> #include <video/cmdline.h> /* * FB_MAX is the maximum number of framebuffer devices and also * the maximum number of video= parameters. Although not directly * related to each other, it makes sense to keep it that way. */ static const char *video_options[FB_MAX] __read_mostly; static const char *video_option __read_mostly; static int video_of_only __read_mostly; static const char *__video_get_option_string(const char *name) { … } /** * video_get_options - get kernel boot parameters * @name: name of the output as it would appear in the boot parameter * line (video=<name>:<options>) * * Looks up the video= options for the given name. Names are connector * names with DRM, or driver names with fbdev. If no video option for * the name has been specified, the function returns the global video= * setting. A @name of NULL always returns the global video setting. * * Returns: * The string of video options for the given name, or NULL if no video * option has been specified. */ const char *video_get_options(const char *name) { … } EXPORT_SYMBOL(…); #if IS_ENABLED(CONFIG_FB_CORE) bool __video_get_options(const char *name, const char **options, bool is_of) { … } EXPORT_SYMBOL(…); #endif /* * Process command line options for video adapters. This function is * a __setup and __init function. It only stores the options. Drivers * have to call video_get_options() as necessary. */ static int __init video_setup(char *options) { … } __setup(…);
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