Hi Glenn, thanks a lot for answering.

I hope you don't mind if I ask you to guide me through these steps. I have 
both the kernel driver code, the datasheet and device schematics, so I have 
all's required  to complete this... I think. Except experience :)

For example, I've posted the device control names already, from kernel 
driver.
There's no external DSP, as the audio section is relatively simple and 
designed around a Realtek ALC5621 chip.
About control values. I've got the ALC5621 datasheet, but I miss where to 
define those values in our code. If you could provide how that works for 
the grouper' example, for just one control, I could try to map to my device 
and eventually extend to all controls.

On Thursday, 8 November 2012 14:42:21 UTC+1, ffxx68 wrote:
>
> Hi
>
> I'm trying to port a ICS implementation of ALSA audio to JB, or a tablet 
> device, under this project:
>
> Mainly, I have the following to integrate (which I have the patch for ICS):
>
> external/alsa-lib
> hardware/alsa_sound
>
> plus some other smaller fix around, but I want to understand first of all 
> what to do with these two first. 
>
> For example, I have the some files with the same names in both 
> hardware/alsa_sound and hardware/libhardware_legacy/
> audio (from AOSP), but their content is very different in the two 
> locations.
>
> If I keep the ones from hardware/alsa_sound, build fails.
> If I copy them from hardware/libhardware_legacy/audio to 
> hardware/alsa_sound, I can build but I get a crash during boot.
>
> Which one should I keep and compile? 
> Once compiled, which libraries should I use from alsa_sound or 
> libhardware_legacy/audio?
>
> Basically, I don't know the approach to follow, with the ALSA integration. 
> I couldn't find any guide, or tutorial, so any help in that sense is 
> welcome too.
>
> Thanks in advance
> Fabio
>

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