Question about codec which is supporting TDM / 5.1ch

Question about codec which is supporting TDM / 5.1ch

[Kuninori Morimoto]

Hi ALSA / ALSA SoC

Now, we want to create new board, and then, we want to use below codec if exist.
Can you show it to us if it was exist ?
(I researched it on upstream Linux source tree, but couldn't find....)

 - upstream Linux supports its driver
 - it supports TDM format
 - it supports 5.1ch sound
 - it supports DT bindings (if possible) 

Best regards
---
Kuninori Morimoto

Re: Question about codec which is supporting TDM / 5.1ch

[Mark Brown]

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On Wed, Jan 21, 2015 at 07:44:17AM +0000, Kuninori Morimoto wrote:

> Now, we want to create new board, and then, we want to use below codec if exist.
> Can you show it to us if it was exist ?
> (I researched it on upstream Linux source tree, but couldn't find....)

>  - upstream Linux supports its driver
>  - it supports TDM format
>  - it supports 5.1ch sound
>  - it supports DT bindings (if possible) 

Some of the Wolfson/Cirrus mobile CODECs can do that with some fiddling
and mixing of output types but they're not really a good fit.  Most of
the things doing 5.1 are like the WM8580 - they use separate data lines
rather than TDM, as far as I can tell a lot of 5.1 systems out there do
this by hooking up multiple stereo CODECs in parallel as slaves rather
than by using a single 5.1 CODEC.

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Re: Question about codec which is supporting TDM / 5.1ch

[Lars-Peter Clausen]

On 01/21/2015 08:44 AM, Kuninori Morimoto wrote:
>
> Hi ALSA / ALSA SoC
>
> Now, we want to create new board, and then, we want to use below codec if exist.
> Can you show it to us if it was exist ?
> (I researched it on upstream Linux source tree, but couldn't find....)
>
>   - upstream Linux supports its driver
>   - it supports TDM format
>   - it supports 5.1ch sound
>   - it supports DT bindings (if possible)

Hi,

The AD1937(I2C) and AD1938/AD1939/ADAU1328(SPI) have TDM support and 8 DACs. 
So they can support up to 7.1.

For more info see 
http://wiki.analog.com/resources/tools-software/linux-drivers/sound/ad1936

- Lars

Re: Question about codec which is supporting TDM / 5.1ch

[Kuninori Morimoto]

Hi Mark

> > Now, we want to create new board, and then, we want to use below codec if exist.
> > Can you show it to us if it was exist ?
> > (I researched it on upstream Linux source tree, but couldn't find....)
> 
> >  - upstream Linux supports its driver
> >  - it supports TDM format
> >  - it supports 5.1ch sound
> >  - it supports DT bindings (if possible) 
> 
> Some of the Wolfson/Cirrus mobile CODECs can do that with some fiddling
> and mixing of output types but they're not really a good fit.  Most of
> the things doing 5.1 are like the WM8580 - they use separate data lines
> rather than TDM, as far as I can tell a lot of 5.1 systems out there do
> this by hooking up multiple stereo CODECs in parallel as slaves rather
> than by using a single 5.1 CODEC.

Thank you for your information.
I guess multi-codec is for this purpose ?

If yes, I wonder what is different between DPCM and multi-codec ?


Best regards
---
Kuninori Morimoto

Re: Question about codec which is supporting TDM / 5.1ch

[Kuninori Morimoto]

Hi Lars

> > Now, we want to create new board, and then, we want to use below codec if exist.
> > Can you show it to us if it was exist ?
> > (I researched it on upstream Linux source tree, but couldn't find....)
> >
> >   - upstream Linux supports its driver
> >   - it supports TDM format
> >   - it supports 5.1ch sound
> >   - it supports DT bindings (if possible)
> 
> Hi,
> 
> The AD1937(I2C) and AD1938/AD1939/ADAU1328(SPI) have TDM support and 8 DACs. 
> So they can support up to 7.1.
> 
> For more info see 
> http://wiki.analog.com/resources/tools-software/linux-drivers/sound/ad1936

Thank you for your information !!


Best regards
---
Kuninori Morimoto