On Mon, 31 Aug 2009 14:16:06 +0100, Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, Aug 31, 2009 at 02:48:55PM +0530, Aggarwal, Anuj wrote: > >> I have 3 instances of AIC23 on my board and all are connected to >> different I2C/McBSP and hence can be used independently. How should >> I use/modify the current AIC23 driver and write the asoc board-specific >> file to enable all the AIC23 instances? Is there any similar >> implementation in the audio subsystem which I can look as a reference? > > This is not currently supported; it needs a lot of work in the core to > allow multiple CODEC drivers to coexist. Things like and the > presentation of controls to user space can't really cope at the minute. > It's a bit easier in your case since you essentially have three sound > cards (rather than one card with multiple CODECS) but there's still a > bit of work needed around device registration. > > For now you'll need to write three machine drivers only one of which is > permitted to be loaded at once; once the core has this support added > you'll then be able to load all three at once and have the three appear > as separate sound cards. If you'd like to contribute the core support > that'd be excellent :) > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel -- Pedro I. Sanchez What if the codecs are different? My board has a playback-only device (TAS5709) and a capture-only device (PCM1800). Would it be OK to implement a single machine driver with num_dai=2? Or would you suggest to implement two different sound cards? -- Pedro _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
