vcaudio.4 revision 1.2
$NetBSD: vcaudio.4,v 1.2 2021/02/26 10:33:46 nia Exp $
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.Dd February 26, 2021 .Dt VCAUDIO 4 .Os .Sh NAME .Nm vcaudio .Nd Broadcom VideoCore integrated audio device driver .Sh SYNOPSIS .Cd "vcaudio* at vchiq?" .Sh DESCRIPTION The .Nm driver provides support for the VideoCore 4 audio interface found on Broadcom SoCs used in boards such as the Raspberry Pi.
Copyright (c) 2021 The NetBSD Foundation, Inc.
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.
.Dd February 26, 2021 .Dt VCAUDIO 4 .Os .Sh NAME .Nm vcaudio .Nd Broadcom VideoCore integrated audio device driver .Sh SYNOPSIS .Cd "vcaudio* at vchiq?" .Sh DESCRIPTION The .Nm driver provides support for the VideoCore 4 audio interface found on Broadcom SoCs used in boards such as the Raspberry Pi.
p Three outputs are supported: .Li auto , .Li headphones , and .Li hdmi . The selected output can be changed using the .Li outputs.select .Xr mixerctl 1 variable. .Li headphones corresponds to the analog 3.5mm jack on the Raspberry Pi.
p The hardware does not support recording. .Sh SEE ALSO .Xr mixerctl 1 , .Xr audio 4 , .Xr mixer 4 , .Xr vchiq 4 .Sh HISTORY The .Nm device driver appeared in .Nx 7.0 . .Sh BUGS The playback block size is fixed at 40ms of audio. The hardware output format is fixed at stereo 48kHz 16-bit LPCM so is not configurable with .Xr audiocfg 1 .