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
display_timing_parse(int phandle,struct display_timing * timing)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