Re: [alsa-devel] [PATCH] ARM: kirkwood: enable S/PDIF

[Sebastian Hesselbarth]

On 07/23/13 15:06, Mark Brown wrote:
> On Tue, Jul 23, 2013 at 09:43:47AM +0100, Russell King - ARM Linux wrote:
> > On Tue, Jul 23, 2013 at 10:23:20AM +0200, Jean-Francois Moine wrote:
> > > This patch enables S/PDIF.
>
> > > Signed-off-by: Jean-Francois Moine <moinejf@xxxxxxx>
>
> > I'm not submitting my patch to do this because:
>
> > (a) we don't know what effect this has on other hardware.
>
> This patch will do absolutely nothing unless it's used in a machine
> driver which connects a S/PDIF CODEC to it.  I see no reason not to
> apply it, someone with hardware with more complex needs can always build
> on it later.

Mark,

the mask that is changed in the patch is what will be written
into i2s controller's registers. So, if there is no S/PDIF in that 
specific controller that bit can possibly have a different meaning.
Also, enabling both I2S playback and SPDIF playback can cause the
controller to behave differently.

I share Russell's concern about it and would rather like to use
multiple codecs per DAI (DPCM) for that. I see Daniel Mack picked
that up again, maybe he submits something soon.

Sebastian
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