From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benoit Cousson Subject: Re: ASoC: Two codecs on a single CPU DAI Date: Wed, 21 May 2014 13:29:37 +0200 Message-ID: <537C8E21.8040400@baylibre.com> References: <537B53C9.6000900@barix.com> <537B5CA4.8010607@metafoo.de> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mail-wi0-f172.google.com (mail-wi0-f172.google.com [209.85.212.172]) by alsa0.perex.cz (Postfix) with ESMTP id E4650261A3D for ; Wed, 21 May 2014 13:29:40 +0200 (CEST) Received: by mail-wi0-f172.google.com with SMTP id hi2so7472910wib.17 for ; Wed, 21 May 2014 04:29:39 -0700 (PDT) In-Reply-To: <537B5CA4.8010607@metafoo.de> 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: Petr Kulhavy Cc: alsa-devel@alsa-project.org, Lars-Peter Clausen List-Id: alsa-devel@alsa-project.org Hi Petr, I'm about to release a v4, but you can used the previous version that = was working fine for my setup. I'm glad to have more users for the series, because my setup is so = simple that I cannot validate all the code I'm about to change :-( Bottom line; The more, the merrier. Regards, Benoit On 20/05/2014 15:46, Lars-Peter Clausen wrote: > On 05/20/2014 03:08 PM, Petr Kulhavy wrote: >> Hi, >> >> I'm writing a driver for a custom DaVinci board, which has two codecs >> (Wolfson and STA323 amplifier) connected to the same CPU DAI. The >> intention >> is that both codecs always play the same audio, only the volume/mixer >> settings are controlled separately. In addition to that the design is >> atypical by the fact, that the Wolfson is the clock master. So in >> order to >> play audio on the amplifier the Wolfson must be initialized as well. >> >> My question is: how to reflect this architecture in a SOC platform >> driver? >> >> As the first approach I tried to create two DAI links, one for each >> codec. >> That worked if audio was first played on the Wolfson link (clock >> master was >> initialized) and then on the second link, using the same sampling rate. >> >> But in fact I would need only one DAI link to both. So then I tried to >> make >> just one link to Wolfson and put the amplifier as an "aux_dev". However >> there I need to set hw_params and format for the amplifier codec DAI and >> those functions were not called. In fact there was no codec DAI >> created for >> the amplifier. I've also seen that one can define rtd_aux runtimes, >> but have >> nowhere found how to use it. >> >> Could someone please help me? > > Hi, > > Benoit is currently working on adding support for this to the ASoC > framework, see this patch series: > http://comments.gmane.org/gmane.linux.alsa.devel/122160 > > - Lars > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel -- = Beno=EEt Cousson BayLibre Embedded Linux Technology Lab www.baylibre.com