62 lines
2.3 KiB
Groff
62 lines
2.3 KiB
Groff
.\" $NetBSD: ddc.4,v 1.1 2006/05/11 21:00:19 gdamore Exp $
|
|
.\"
|
|
.\" Copyright (c) 2006 Itronix Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Written by Garrett D'Amore for Itronix Inc.
|
|
.\"
|
|
.\" 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.
|
|
.\" 3. The name of Itronix Inc. may not be used to endorse
|
|
.\" or promote products derived from this software without specific
|
|
.\" prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC.
|
|
.\" 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.
|
|
.\"
|
|
.Dd May 11, 2006
|
|
.Dt DDC 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm ddc
|
|
.Nd VESA Display Data Channel V2 devices
|
|
.Sh SYNOPSIS
|
|
.Cd "ddc at iic? addr 0x50"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver provides support for accessing the VESA Display Data Channel Version 2
|
|
supported by many video displays.
|
|
.Sh BUGS
|
|
This driver does not provide any mechanism for access from user applications.
|
|
Its only use at this point is to provide a means for framebuffer device
|
|
drivers to query monitor description data (EDID) using a specialized
|
|
in-kernel API. No support for sending control commands to display devices
|
|
is provided.
|
|
.Sh SEE ALSO
|
|
.Xr iic 4 ,
|
|
.Xr ddc 9 ,
|
|
.Xr edid 9
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device appeared in
|
|
.Nx 4.0 .
|
|
.Sh AUTHORS
|
|
.An Garrett D'Amore Aq gdamore@NetBSD.org
|