ALSA SoC Architecture Document

ALSA SoC Architecture Document

[Anuj Aggarwal]

Hi,

I was looking for ASoC architecture document and came across a
presentation done by Liam Girdwood for ASoC in Jan 2006
(http://www.embedded-kernel-track.org/2006/ASoC.pdf). But I could not
find the presentation because the link has expired.

Can someone share the presentation or any other ASoC specific
architecture document, which can help someone understand the design
and data/control paths?

Thanks in advance
Anuj Aggarwal

Re: ALSA SoC Architecture Document

[Mark Brown]

On Tue, Feb 17, 2009 at 05:41:24PM +0530, Anuj Aggarwal wrote:

> I was looking for ASoC architecture document and came across a
> presentation done by Liam Girdwood for ASoC in Jan 2006
> (http://www.embedded-kernel-track.org/2006/ASoC.pdf). But I could not
> find the presentation because the link has expired.

> Can someone share the presentation or any other ASoC specific
> architecture document, which can help someone understand the design
> and data/control paths?

Google turns up some presentations[1], though most of them are
relatively old.  For the most part the documentation that is shipped
with the kernel under Documentation/sound/alsa/soc is about as up to
date as it gets beyond the code itself.  If you have any specific
questions please just ask away.

[1] eg https://foss.in/2006/cfp/slides/ALSA_and_OLPC_audio_82.pdf

Re: ALSA SoC Architecture Document

[Anuj Aggarwal]

As I have mentioned earlier, I am specifically looking for some
architecture/block diagrams and data/control paths which will enable
users to grasp quickly what is lying underneath, instead of the user
going and reading the kernel documentation.

On Tue, Feb 17, 2009 at 6:37 PM, Mark Brown <broonie@sirena.org.uk> wrote:
> On Tue, Feb 17, 2009 at 05:41:24PM +0530, Anuj Aggarwal wrote:
>
>> I was looking for ASoC architecture document and came across a
>> presentation done by Liam Girdwood for ASoC in Jan 2006
>> (http://www.embedded-kernel-track.org/2006/ASoC.pdf). But I could not
>> find the presentation because the link has expired.
>
>> Can someone share the presentation or any other ASoC specific
>> architecture document, which can help someone understand the design
>> and data/control paths?
>
> Google turns up some presentations[1], though most of them are
> relatively old.  For the most part the documentation that is shipped
> with the kernel under Documentation/sound/alsa/soc is about as up to
> date as it gets beyond the code itself.  If you have any specific
> questions please just ask away.
>
> [1] eg https://foss.in/2006/cfp/slides/ALSA_and_OLPC_audio_82.pdf
>



-- 
Best Regards,
Anuj Aggarwal

Re: ALSA SoC Architecture Document

[Mark Brown]

On Tue, Feb 17, 2009 at 06:50:32PM +0530, Anuj Aggarwal wrote:

[Please don't top post.]

> As I have mentioned earlier, I am specifically looking for some
> architecture/block diagrams and data/control paths which will enable
> users to grasp quickly what is lying underneath, instead of the user
> going and reading the kernel documentation.

What exactly are you trying to give an overview of - who is the user and
what do they want to know?

If you're trying to explain what the controls exposed to user space map
to then that's going to be specific to a given board (and codec).  If
you just want a brief overview of how things are structured in kernel
without any detail then if there's nothing in any of the presentations
then something along the lines of the quick ASCII art below *might*
help?

                 /----\
                 |ALSA|
                 \----/
                   ||
               /---------\
               |ASoC core|
               \---------/
                   ||
          =====================
          ||       ||        ||
      /-------\ /--------\ /-----\
      |Machine| |Platform| |Codec|
      \-------/ \--------/ \-----/