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dumping ground for generic driver convenience functions 

So far it contains only a generic WSDISPLAYIO_GET_EDID implementation that
relies on EDID data being passed to drivers as a device property.
This commit is contained in:
macallan 2011-06-29 03:09:37 +00:00
parent 5058059930
commit 8db9d73a65
2 changed files with 61 additions and 1 deletions
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3
sys/dev/wscons/files.wscons
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@ -1,4 +1,4 @@
# $NetBSD: files.wscons,v 1.44 2011/05/25 06:13:30 macallan Exp $
# $NetBSD: files.wscons,v 1.45 2011/06/29 03:09:37 macallan Exp $
#
# "Workstation Console" glue; attaches frame buffer to emulator & keyboard,
@ -46,6 +46,7 @@ attach wsmouse at wsmousedev
file dev/wscons/wsdisplay.c wsdisplay needs-flag
file dev/wscons/wsdisplay_compat_usl.c wsdisplay & wsdisplay_compat_usl
file dev/wscons/wsdisplay_util.c wsdisplay
file dev/wscons/wsemulconf.c wsdisplay
file dev/wscons/wsemul_dumb.c wsdisplay & !wsemul_no_dumb
file dev/wscons/wsemul_sun.c wsdisplay & wsemul_sun

59
sys/dev/wscons/wsdisplay_util.c Normal file
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@ -0,0 +1,59 @@
/* $NetBSD: wsdisplay_util.c,v 1.1 2011/06/29 03:09:37 macallan Exp $ */
/*-
* Copyright (c) 2009 Michael Lorenz
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/* some utility functions for use with wsdisplay */
#include <sys/param.h>
#include <sys/stdint.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <dev/cons.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
int
wsdisplayio_get_edid(device_t dev, struct wsdisplayio_edid_info *d)
{
prop_data_t edid_data;
int edid_size;
edid_data = prop_dictionary_get(device_properties(dev), "EDID");
if (edid_data != NULL) {
edid_size = prop_data_size(edid_data);
/* less than 128 bytes is bogus */
if (edid_size < 128)
return ENODEV;
d->data_size = edid_size;
if (d->buffer_size < edid_size)
return EAGAIN;
return copyout(prop_data_data_nocopy(edid_data),
d->edid_data, edid_size);
}
return ENODEV;
}