1 /* $NetBSD: display_timing.c,v 1.1 2017/06/03 14:48:02 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: display_timing.c,v 1.1 2017/06/03 14:48:02 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/device.h> 35 #include <sys/kmem.h> 36 #include <sys/bus.h> 37 38 #include <dev/fdt/fdtvar.h> 39 #include <dev/fdt/display_timing.h> 40 41 #define GETPROP(n, v) \ 42 of_getprop_uint32(phandle, (n), (v)) 43 44 int 45 display_timing_parse(int phandle, struct display_timing *timing) 46 { 47 if (GETPROP("clock-frequency", &timing->clock_freq) || 48 GETPROP("hactive", &timing->hactive) || 49 GETPROP("vactive", &timing->vactive) || 50 GETPROP("hfront-porch", &timing->hfront_porch) || 51 GETPROP("hback-porch", &timing->hback_porch) || 52 GETPROP("hsync-len", &timing->hsync_len) || 53 GETPROP("vfront-porch", &timing->vfront_porch) || 54 GETPROP("vback-porch", &timing->vback_porch) || 55 GETPROP("vsync-len", &timing->vsync_len)) 56 return EINVAL; 57 58 return 0; 59 } 60