linux-kernel - Re: [alsa-devel] [PATCH v2 3/4] ASoC: simple-card: accept many DAI links

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Date:	Fri, 14 Mar 2014 19:58:19 +0100
From:	Jean-Francois Moine <moinejf@...e.fr>
To:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>,
	Jyri Sarha <jsarha@...com>
Cc:	Mark Brown <broonie@...nel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Subject: Re: [alsa-devel] [PATCH v2 3/4] ASoC: simple-card: accept many DAI
 links

On Wed, 12 Mar 2014 05:20:17 +0000
"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com> wrote:

> I'm not sure why only the first link needs parsing the DAIFMT ?

In my machine, there is only one audio device and the CODECs don't need
any format, sysclk or TDM slot.

But, as Jyri asked it too, I will add these properties.

> On my LS1 platform there are two CODECs and two CPU SAI deivces,
> SGTL5000 <---> SAI
> CS42888  <---> ESAI
> 
> Could the many dai links feature support this case? 

As Jyri said: why not two simple-cards?

> I my understanding is correct here, this patch will support the
> Board, in which board there maybe only one CODEC supporting many
> DAIs...

The audio (platform) device of my machine has two outputs (I2S and
S/PDIF = CPU DAIs) which are connected to different CODECs (HDMI
transmitter and S/PDIF connector).

There must be two different HDMI CODECs because the format and rate
constraints of the wires (I2S and S/PDIF) are different.

There is only one playback stream.

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/
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