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