NetBSD/share/man/man4/ddc.4

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.\" $NetBSD: ddc.4,v 1.2 2006/12/23 06:52:49 wiz 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:
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.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" 3. The name of Itronix Inc. may not be used to endorse
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.\" prior written permission.
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.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