Re: [Bluez-devel] question: what does this patch from snd-bt-sco do?

[Marcel Holtmann <marcel@holtmann.org>]

Hi Lars,

> I hope you can remember the issue we had a few weeks ago about
> snd-bt-sco/bt-headset stuff.
> 
> I'm right now moving it from alsa 1.0.3 to 1.0.5a and kernel 2.6.7, and
> I want to get rid of this patch (as it seems you all don't like it).
> 
> But I still don't understand, and can't find out, what I have to do to
> set the dubious "alternate" setting of the hci_usb you spoke of. I'm
> totally lost here, and I hope you can help me out easily :)
> 
> I understand what it does, but I don't have *any* clue right now what I
> have to do to set the usb alternate setting.

the alternate setting is right for one SCO channel and a voice setting
of 0x0060.

> - - parameter to hci_usb on module load or some other CL stuff?
> - - changing something in the btsco userspace daemon that handles the
> rfcomm/sco-stuff?
> 
> If you could just supply a short code snippet that shows how to handle
> this stuff. Right now it does not look very wise to reduce support to
> audio 0x0060, because it seems that not many headsets support that audio
> encoding.

This has nothing to do with the headset, because we are talking about
the input coding and not the air coding.

> As soon as this works again, I'll put a new patch together and make it
> available.

What kind of patch? We need dynamic alternate setting adjustment for the
hci_usb driver. Nothing else.

Regards

Marcel




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