cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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of_videomode.c (1406B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * generic videomode helper
      4 *
      5 * Copyright (c) 2012 Steffen Trumtrar <s.trumtrar@pengutronix.de>, Pengutronix
      6 */
      7#include <linux/errno.h>
      8#include <linux/export.h>
      9#include <linux/of.h>
     10#include <video/display_timing.h>
     11#include <video/of_display_timing.h>
     12#include <video/of_videomode.h>
     13#include <video/videomode.h>
     14
     15/**
     16 * of_get_videomode - get the videomode #<index> from devicetree
     17 * @np: devicenode with the display_timings
     18 * @vm: set to return value
     19 * @index: index into list of display_timings
     20 *	    (Set this to OF_USE_NATIVE_MODE to use whatever mode is
     21 *	     specified as native mode in the DT.)
     22 *
     23 * DESCRIPTION:
     24 * Get a list of all display timings and put the one
     25 * specified by index into *vm. This function should only be used, if
     26 * only one videomode is to be retrieved. A driver that needs to work
     27 * with multiple/all videomodes should work with
     28 * of_get_display_timings instead.
     29 **/
     30int of_get_videomode(struct device_node *np, struct videomode *vm,
     31		     int index)
     32{
     33	struct display_timings *disp;
     34	int ret;
     35
     36	disp = of_get_display_timings(np);
     37	if (!disp) {
     38		pr_err("%pOF: no timings specified\n", np);
     39		return -EINVAL;
     40	}
     41
     42	if (index == OF_USE_NATIVE_MODE)
     43		index = disp->native_mode;
     44
     45	ret = videomode_from_timings(disp, vm, index);
     46
     47	display_timings_release(disp);
     48
     49	return ret;
     50}
     51EXPORT_SYMBOL_GPL(of_get_videomode);