[alsa-devel] Problem using alsa to implement an Android dock

Clemens Ladisch clemens at ladisch.de
Mon Jun 10 14:02:34 CEST 2013

Jeremy Rosen wrote:
> my problems arrive when both the dock mode and the accessory mode are
> enabled. in that case Alsa will not recognise the usb sound device exposed
> by android.

>       bInterfaceNumber        1
>       bInterfaceSubClass      Control Device
>       AudioControl Interface Descriptor:
>         baInterfaceNr           0
>         baInterfaceNr           1
>       bInterfaceNumber        2
>       bInterfaceSubClass      Streaming

This is a bug in the Android firmware: it says that the audio driver
should look at interfaces 0 and 1, but the actual audio interfaces are
1 and 2.

I'll look into this ...


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