From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthieu CASTET <matthieu.castet@parrot.com>
Subject: Re: [ASoC] machine driver and channel configuration
Date: Fri, 08 Jun 2007 17:55:03 +0200
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To: Timur Tabi <timur@freescale.com>
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Hi,

Timur Tabi a =E9crit :
> Matthieu CASTET wrote:
>> Hi,
>>
>> If the platform/cpu_dai driver and codec support capture and playback =

>> channels.
>> But on the board only the playback link is connected.
>>
>> In this configuration, the codec and platform/cpu_dai driver shouldn't =

>> try to
>> use the capture path (and the resource associated to this).
>>
>>
>> Is there a way to do something like that ?
> =

> I'm just learning about ASoC myself, but using wm8731.c as an example, =

> wouldn't this work:
> =

> struct snd_soc_codec_dai wm8731_dai =3D {
>     .name =3D "WM8731",
>     .playback =3D {
>         .stream_name =3D "Playback",
>         .channels_min =3D 1,
>         .channels_max =3D 2,
>         .rates =3D WM8731_RATES,
>         .formats =3D WM8731_FORMATS,},
>     .capture =3D {
>         .stream_name =3D "Capture",
>         .channels_min =3D 1,
>         .channels_max =3D 2,
>         .rates =3D WM8731_RATES,
>         .formats =3D WM8731_FORMATS,},
> =

> Just change capture.channels_min and channels_max to 0.
> =


Hum, yes I could change channel info at runtime before doing the =

platform_device_add in machine driver.

I'll try that.

Thanks.
Matthieu