[alsa-devel] [RFC] [PATCH 1/3] ASoC: Add support for Conexant CX20442-11 voice modem codec

Janusz Krzysztofik jkrzyszt at tis.icnet.pl
Tue Jul 28 18:36:01 CEST 2009

Tuesday 28 July 2009 18:11:32 Mark Brown wrote:
> On Tue, Jul 28, 2009 at 06:07:29PM +0200, Janusz Krzysztofik wrote:
> > now. Activation of the line discipline would deregister the codec device
> > from the platform bus and reregister it again, now as the line discipline
> > provided device. Is this possible with current ASoC framework?
> No, not currently.  But why would you do that, anyway?
> Like I say, I'd suggest always keeping the controls registered and just
> masking and unmasking from user space - the control indexes get used so
> removing them will just confuse things.

However, in order for the machine driver to unmask/mask a machine specific 
control, the codec driver must drop the machine driver a message about the 
line discipline being activeted/deactivated, right? The only such existing 
feedback I can see the codec is able to use is via snd_soc_init_card() that 
calls snd_soc_dai_link.init() in turn. Am I missing something?


More information about the Alsa-devel mailing list