Andrea,
I need to play audio files (wav,mp3). I do not know how
much from "advanced ALSA" features I need, I just would
like to invest my time in something that will work in all
cases, rather than base my design on i2s driver, struggle
with lack of functionality and then move to ALSA.
Things that I know: I have to use DMA, I like to use abstarctions
ALSA introduces, I do not care about codec, solution has
to be extensible (features list will grow), I better use
stable/officialy supported distro like TS-Linux 2.4.
I did not know status of ALSA on TS-2.4 and ALSA generally on
TS-7400, this is why created the post. If my messages sound
unclear this is because I have little experience with
ALSA and TS.
Thanks,
Igor
--- In Ciaccia <> wrote:
>
> > > I did this, I can find the patches and make them available for
you.
> >
> > That would be nice. I see that you gone thru all these things in
> > Jan, did you actually manage to get sound via i2s? Anyway, I am
very
> > interested in your patches, this way or another I must have i2s
> > running, your code will save weeks of my work time...
>
> I think I don't completely understand what you mean with "get
sound with i2s"...
> If you just want to "get sound with i2s" you can use the TS 2.4
kernel, it comes with a
> i2s-cs4271 module in it.
>
> I wanted to have a fully working ALSA support for I2S/CS4271, so I
moved to the 2.6.
> If my goal was just to send some PCM data to the sound card and I
did not need all the
> power/flexibility of ALSA, the TS-2.4 kernel could have done the
trick.
>
> Igor, what do you need exactly? If you don't need advanced ALSA
features, forget about my posts.
> If you just want to send some data to your card, you can use the
original TS-2.4 kernel.
>
> > Btw, i2s driver that TS took from cirrus, is it what ALSA code
uses
> > down the road, I mean is it what called to do the job?
>
> I don't understand the line above. The TS-2.4 comes with an ALSA
driver (originally from cirrus).
> The driver "works", but some basic ALSA functionalities
(especially MMAP, also called "zero-copy" communication) are
missing...
>
> I think I misunderstood your first post...
>
> Andrea
>
>
>
>
>
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