[alsa-devel] [RFC] Alsa mixer over serial port

Janusz Krzysztofik jkrzyszt at tis.icnet.pl
Sun Jul 5 22:55:21 CEST 2009

Thursday 02 July 2009 15:32:21 Mark Brown napisał(a):
> On Thu, Jul 02, 2009 at 03:27:43PM +0200, Janusz Krzysztofik wrote:
> > I can see two ways of getting this working:
> > 1) add a new line discipline that would take control over the serial
> > line and convert it to an alsa mixer,
> > 2) create a low level driver that would replace standard serial stuff
> > completely (like snd-serial-u16550 does, for example).
> >
> > Please advise which one is better.
> ASoC doesn't really care for itself - it just needs the upper layer
> interface, how exactly the driver ineteracts with the device is not
> important to ASoC.

Mark, thanks.

As there are no other votes, I choose line discipline. Generic form of 
required userspace support is already provided with util-linux-ng and it 
seems much better to use established low level driver code than reinvent a 
new one ;).

I hope there will be no problem getting a new line discipline registered with 
include/linux/tty.h, even if it turns out that the code using it is dedicated 
to a specific device not found on any other board than my Amstrad E3.


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