From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anssi Hannula Subject: Re: Fwd: Front speakers doesn't work in multichannel output, regression in ALC888 Date: Thu, 14 May 2015 10:45:30 +0300 Message-ID: <5554529A.4040202@iki.fi> References: <2927807.UsnFnTlWVL@luklap.workgroup> <4324603.tPLEjaP5mH@luklap.workgroup> <4678913.FpDgrA5u1d@luklap.workgroup> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail3.ippnet.fi (mail3.ippnet.fi [62.197.168.3]) by alsa0.perex.cz (Postfix) with ESMTP id E61B626053E for ; Thu, 14 May 2015 09:45:39 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Raymond Yau Cc: lukasz.wojnilowicz@gmail.com, tiwai@suse.de, ALSA Development Mailing List List-Id: alsa-devel@alsa-project.org 14.05.2015, 09:26, Raymond Yau kirjoitti: >>>> I started MS Windows and without externals speakers plugged in I >>> >>> could test >>> > 5.1 configuration and it seemed that sound was coming from >>> different directions. >>> >>> > >>> > What I managed to determine: >>> > I've got 3 stacks: >>> > 1 ST: Headphone, Line-out (FL and FR), SPDIF >>> > 2 ST: Microphone, Line-out (CLFE) >>> > 3 ST: Line-in, Line-out (RL and RR) >>> > >>> > I've got 5 responsive output pins >>> > PIN 0x14: Internal FL FR >>> > PIN 0x15: External FL FR >>> > PIN 0x17: Internal LFE >>> > PIN 0x18: External CLFE >>> > PIN 0x1a: External RL RR >>> > >>> > How can we make it work with these information? > > speaker-test -Dhw:0,0 -c6 -t wav > >>> >>> >>> > https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/plain/Documentation/sound/alsa/Channel-Mapping-API.txt >>> [1] >>> >>> seem chnmap type _FIXED , _VAR and _PAIRED does not fit when LFE and >>> FC can be swapped for internal speaker and external speaker >> >> >> Right, you can't do it with a single map of one of those types. > > http://git.alsa-project.org/?p=alsa-utils.git&a=search&h=HEAD&st=commit&s=chmap > > do chmap of internal speakers need {FL FR RL RR LFE NA} ? >>From above it looks like there are 3 internal speakers, so I guess e.g. {FL FR LFE NA} might be in order (or just {FL FR LFE} if 3-channel playback is supported). > http://git.alsa-project.org/?p=alsa-lib.git&a=search&h=HEAD&st=commit&s=chmap > > as set_chmap() still not yet implemented in pcm_route.c > > do speaker-test need to specify channel map when using those odd number > channels ? > > speaker-test -D surround21 -c3 -t wav > speaker-test -D surround41 -c5 -t wav -mFL,FR,RL,RR,LFE > speaker-test -D surround50 -c5 -t wav Well, the driver should provide the correct chmap. > http://git.alsa-project.org/?p=alsa-utils.git;a=commitdiff;h=7b14c00b56784f69ecc954a2de36e0a058fc8849;hp=000bf230cfb3b0abe88d27701dd77982675126ec > > this example seem not working > > speaker-test -c2 -t wav -Dplug:front -mFR,FL You are getting an error? If so, that is expected if the underlying device does not support the wanted channel map. >> >> >>> > https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=0fb87bb474f978446786263deff6263284e6e011 >>> [2] >>> >>> How do the driver implement channel map when codec has swap >>> center/lfe switch ? >>> >>> Do chmap contain both {FL FR RL RR FC LFE} and {FL FR RL RR LFE FC} ? >> >> >> If you want to provide support for userspace doing it both ways, then > yes, you need those two _FIXED maps. > > Can chmap contain two _FIXED maps of same number of channels ? Sure. -- Anssi Hannula