[alsa-devel] ALSA and MediaController

Mark Brown broonie at opensource.wolfsonmicro.com
Sat May 21 12:57:32 CEST 2011

Raymond, it's fairly basic process for Linux lists to do a reply to
all.  Please pay attention to this.

On Sat, May 21, 2011 at 10:43:55AM +0800, Raymond Yau wrote:
> 2011/5/18 pl bossart <bossart.nospam at gmail.com>:
> > During the ALSA/Embedded audio workshop two weeks ago we talked about
> > using the MediaController API (merged in 2.6.39) to provide userspace
> > with a graph-like representation of the transforms implemented in
> > firmware or hardware.

> How Media controller or PA handle hda jack retasking of those 3 jacks
> motherboard (channel mode or smart 5.1 switch) ?

> For those mini ITX motherboard without front audio panel, there will
> be no capture source if the HDA codec does not support stereo mix
> after the driver retask those input jacks for 5.1 outputs

This just sounds like a fairly basic reconfiguration of the CODEC, it's
no different to any other rerouting.

> Does this mean that those 3 jacks , 5 jacks and 6 jacks desktop need
> to add the rear panel jack to use snd_jack_report ?

It seems like a good idea to report any jacks we can do detection on....

More information about the Alsa-devel mailing list