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

Jean-Francois Moine moinejf at free.fr
Fri Mar 14 19:58:19 CET 2014

On Wed, 12 Mar 2014 05:20:17 +0000
"Li.Xiubo at freescale.com" <Li.Xiubo at freescale.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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