[src/trunk]: src/sys/dev/fdt Add helper for parsing display timings.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/75bd3f02f5c6
branches:  trunk
changeset: 354081:75bd3f02f5c6
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Jun 03 14:48:02 2017 +0000

description:
Add helper for parsing display timings.

diffstat:

 sys/dev/fdt/display_timing.c |  59 ++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/fdt/display_timing.h |  47 +++++++++++++++++++++++++++++++++++
 sys/dev/fdt/files.fdt        |   5 ++-
 3 files changed, 110 insertions(+), 1 deletions(-)

diffs (130 lines):

diff -r 63d043b3c5bd -r 75bd3f02f5c6 sys/dev/fdt/display_timing.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/display_timing.c      Sat Jun 03 14:48:02 2017 +0000
@@ -0,0 +1,59 @@
+/* $NetBSD: display_timing.c,v 1.1 2017/06/03 14:48:02 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: display_timing.c,v 1.1 2017/06/03 14:48:02 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kmem.h>
+#include <sys/bus.h>
+
+#include <dev/fdt/fdtvar.h>
+#include <dev/fdt/display_timing.h>
+
+#define        GETPROP(n, v)   \
+       of_getprop_uint32(phandle, (n), (v))
+
+int
+display_timing_parse(int phandle, struct display_timing *timing)
+{
+       if (GETPROP("clock-frequency", &timing->clock_freq) ||
+           GETPROP("hactive", &timing->hactive) ||
+           GETPROP("vactive", &timing->vactive) ||
+           GETPROP("hfront-porch", &timing->hfront_porch) ||
+           GETPROP("hback-porch", &timing->hback_porch) ||
+           GETPROP("hsync-len", &timing->hsync_len) ||
+           GETPROP("vfront-porch", &timing->vfront_porch) ||
+           GETPROP("vback-porch", &timing->vback_porch) ||
+           GETPROP("vsync-len", &timing->vsync_len))
+               return EINVAL;
+
+       return 0;
+}
diff -r 63d043b3c5bd -r 75bd3f02f5c6 sys/dev/fdt/display_timing.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/display_timing.h      Sat Jun 03 14:48:02 2017 +0000
@@ -0,0 +1,47 @@
+/* $NetBSD: display_timing.h,v 1.1 2017/06/03 14:48:02 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _FDT_DISPLAY_TIMING_H
+#define _FDT_DISPLAY_TIMING_H
+
+struct display_timing {
+       /* required */
+       u_int           clock_freq;
+       u_int           hactive;
+       u_int           vactive;
+       u_int           hfront_porch;
+       u_int           hback_porch;
+       u_int           hsync_len;
+       u_int           vfront_porch;
+       u_int           vback_porch;
+       u_int           vsync_len;
+};
+
+int    display_timing_parse(int, struct display_timing *);
+
+#endif /* !_FDT_DISPLAY_TIMING_H */
diff -r 63d043b3c5bd -r 75bd3f02f5c6 sys/dev/fdt/files.fdt
--- a/sys/dev/fdt/files.fdt     Sat Jun 03 14:47:52 2017 +0000
+++ b/sys/dev/fdt/files.fdt     Sat Jun 03 14:48:02 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.15 2017/06/02 15:09:16 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.16 2017/06/03 14:48:03 jmcneill Exp $
 
 include        "external/bsd/libfdt/conf/files.libfdt"
 
@@ -38,3 +38,6 @@
 device cpus { } : fdtbus
 attach cpus at fdt
 file   dev/fdt/cpus.c                          cpus
+
+define fdt_display_timing
+file   dev/fdt/display_timing.c                fdt_display_timing