Date: Fri, 22 Jan 2010 11:40:55 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r202803 - stable/8/share/man/man4 Message-ID: <201001221140.o0MBetqn057632@svn.freebsd.org>
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Author: mav Date: Fri Jan 22 11:40:55 2010 New Revision: 202803 URL: http://svn.freebsd.org/changeset/base/202803 Log: MFC r202160: Update, reflecting added multichannel playback support. Modified: stable/8/share/man/man4/snd_hda.4 Directory Properties: stable/8/share/man/man4/ (props changed) stable/8/share/man/man4/de.4 (props changed) Modified: stable/8/share/man/man4/snd_hda.4 ============================================================================== --- stable/8/share/man/man4/snd_hda.4 Fri Jan 22 11:37:19 2010 (r202802) +++ stable/8/share/man/man4/snd_hda.4 Fri Jan 22 11:40:55 2010 (r202803) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd November 13, 2009 +.Dd January 12, 2010 .Dt SND_HDA 4 .Os .Sh NAME @@ -125,12 +125,14 @@ such as .Dq Li nofixedrate , will do the opposite and takes precedence. Options can be separated by whitespace and commas. +.Pp .Dq Li GPIO Ns s are a codec's General Purpose I/O pins which system integrators sometimes use to control external muters, amplifiers and so on. If you have no sound, or sound volume is not adequate, you may have to experiment a bit with the GPIO setup to find the optimal setup for your system. +.Pp The .Dq Li ivref Ns Ar X and @@ -178,6 +180,11 @@ A unique, per-association number used to particular association. Sequence numbers can be specified as numeric values from 0 to 15. .Pp +For output assotiations sequence numbers encode speaker pairs positions: +0 - Front, 1 - Center/LFE, 2 - Back, 3 - Front Wide Center, 4 - Side. +Standard combinations are: (0) - Stereo; (0, 2), (0, 4) - Quadro; +(0, 1, 2), (0, 1, 4) - 5.1; (0, 1, 2, 4) - 7.1. +.Pp The sequence number 15 has a special meaning for output associations. Output pins with this number and device type .Dq Ar Headphones @@ -639,6 +646,3 @@ to control external amplifiers. In some GPIO bits may be needed to make sound work on specific device. .Pp HDMI and DisplayPort audio may also require support from video driver. -.Pp -Due to OSS limitation multichannel (not multidevice) playback is not -supported.
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