projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cc3f414c ST |
1 | /* |
| 2 | * generic videomode helper | |
| 3 | * | |
| 4 | * Copyright (c) 2012 Steffen Trumtrar <[email protected]>, Pengutronix | |
| 5 | * | |
| 6 | * This file is released under the GPLv2 | |
| 7 | */ | |
| 8 | #include <linux/errno.h> | |
| 9 | #include <linux/export.h> | |
| 10 | #include <linux/of.h> | |
| 11 | #include <video/display_timing.h> | |
| 12 | #include <video/of_display_timing.h> | |
| 13 | #include <video/of_videomode.h> | |
| 14 | #include <video/videomode.h> | |
| 15 | ||
| 16 | /** | |
| 17 | * of_get_videomode - get the videomode #<index> from devicetree | |
| 18 | * @np - devicenode with the display_timings | |
| 19 | * @vm - set to return value | |
| 20 | * @index - index into list of display_timings | |
| 21 | * (Set this to OF_USE_NATIVE_MODE to use whatever mode is | |
| 22 | * specified as native mode in the DT.) | |
| 23 | * | |
| 24 | * DESCRIPTION: | |
| 25 | * Get a list of all display timings and put the one | |
| 26 | * specified by index into *vm. This function should only be used, if | |
| 27 | * only one videomode is to be retrieved. A driver that needs to work | |
| 28 | * with multiple/all videomodes should work with | |
| 29 | * of_get_display_timings instead. | |
| 30 | **/ | |
| 31 | int of_get_videomode(struct device_node *np, struct videomode *vm, | |
| 32 | int index) | |
| 33 | { | |
| 34 | struct display_timings *disp; | |
| 35 | int ret; | |
| 36 | ||
| 37 | disp = of_get_display_timings(np); | |
| 38 | if (!disp) { | |
| 6d7e6533 | 39 | pr_err("%pOF: no timings specified\n", np); |
| cc3f414c ST |
40 | return -EINVAL; |
| 41 | } | |
| 42 | ||
| 43 | if (index == OF_USE_NATIVE_MODE) | |
| 44 | index = disp->native_mode; | |
| 45 | ||
| 6cd2c7db | 46 | ret = videomode_from_timings(disp, vm, index); |
| cc3f414c ST |
47 | |
| 48 | display_timings_release(disp); | |
| 49 | ||
| 37b617f9 | 50 | return ret; |
| cc3f414c ST |
51 | } |
| 52 | EXPORT_SYMBOL_GPL(of_get_videomode); |