From mboxrd@z Thu Jan 1 00:00:00 1970 From: Petr Kulhavy Subject: Re: ASoC: Two codecs on a single CPU DAI Date: Thu, 22 May 2014 15:49:41 +0200 Message-ID: <537E0075.50500@barix.com> References: <537B53C9.6000900@barix.com> <537B5CA4.8010607@metafoo.de> <537C8E21.8040400@baylibre.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wi0-f175.google.com (mail-wi0-f175.google.com [209.85.212.175]) by alsa0.perex.cz (Postfix) with ESMTP id CCC0B265589 for ; Thu, 22 May 2014 15:49:45 +0200 (CEST) Received: by mail-wi0-f175.google.com with SMTP id f8so9286791wiw.2 for ; Thu, 22 May 2014 06:49:45 -0700 (PDT) In-Reply-To: <537C8E21.8040400@baylibre.com> 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: Benoit Cousson Cc: alsa-devel@alsa-project.org, Lars-Peter Clausen List-Id: alsa-devel@alsa-project.org Hi Benoit, thank you, I will try them out. At the moment I need to focus on other projects, but in a few weeks I should be able to get back to the drivers. Regards Petr On 21.05.2014 13:29, Benoit Cousson wrote: > 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 > >