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