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51 lines
1.4 KiB
51 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* generic videomode helper |
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* |
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* Copyright (c) 2012 Steffen Trumtrar <[email protected]>, Pengutronix |
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*/ |
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#include <linux/errno.h> |
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#include <linux/export.h> |
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#include <linux/of.h> |
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#include <video/display_timing.h> |
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#include <video/of_display_timing.h> |
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#include <video/of_videomode.h> |
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#include <video/videomode.h> |
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/** |
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* of_get_videomode - get the videomode #<index> from devicetree |
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* @np: devicenode with the display_timings |
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* @vm: set to return value |
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* @index: index into list of display_timings |
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* (Set this to OF_USE_NATIVE_MODE to use whatever mode is |
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* specified as native mode in the DT.) |
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* |
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* DESCRIPTION: |
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* Get a list of all display timings and put the one |
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* specified by index into *vm. This function should only be used, if |
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* only one videomode is to be retrieved. A driver that needs to work |
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* with multiple/all videomodes should work with |
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* of_get_display_timings instead. |
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**/ |
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int of_get_videomode(struct device_node *np, struct videomode *vm, |
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int index) |
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{ |
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struct display_timings *disp; |
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int ret; |
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disp = of_get_display_timings(np); |
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if (!disp) { |
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pr_err("%pOF: no timings specified\n", np); |
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return -EINVAL; |
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} |
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if (index == OF_USE_NATIVE_MODE) |
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index = disp->native_mode; |
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ret = videomode_from_timings(disp, vm, index); |
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display_timings_release(disp); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(of_get_videomode);
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