[wdmaudiodev] Re: Raspberry Pi OTG Audio
- From: Robert Bielik <Robert.Bielik@xxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 12 Feb 2018 04:47:45 +0000
Now, all of this is a lot of code and large projects to get an overview of.
Perhaps you could tell us what you wish to achieve. Do you need improved
device or driver code?
Pretty much fix the linux UAC2 gadget to be USB 2.0 compliant, i.e. provide a
feedback ep for the OUT ep. Today this stops linux audio gadgets from working
in windows. They do however seem to work on Mac and Linux (AFAIK), so I'm not
sure how that works 😊
Regards
/Robert
"Set the phase" = "define the speed" in this context.
Cheers,
Børge
On Sun, Feb 11, 2018 at 7:37 PM, Robert Bielik <Robert.Bielik@xxxxxxxxx
<mailto:Robert.Bielik@xxxxxxxxx> > wrote:
Thanks Børge,
> If it is of any help: I work on an open source project with
UAC2 device and
> ASIO driver, both with audio OUT and feedback IN
endpoints. All functional.
It might be, do you have a link to that project ?
> AFAIK you can use an audio IN endpoint to set the phase as
an alternative to
> dedicated feedback IN.
Ok, don't really know what phase means in this context, but I'll
look it up 😊
Regards
/Robert
>
> Børge
>
> On Sunday, February 11, 2018, Robert Bielik
<Robert.Bielik@xxxxxxxxx <mailto:Robert.Bielik@xxxxxxxxx>
> <mailto:Robert.Bielik@xxxxxxxxx
<mailto:Robert.Bielik@xxxxxxxxx> > > wrote:
>
>
> > Wait, never mind – I recognize that failing status code.
> usbaudio2.sys is
> > complaining that you have an asynchronous data OUT
> endpoint but it can’t
> > find a corresponding feedback endpoint.
>
> Thanks Matthew, that explains it. And this is, as of linux
4.15.*
> not implemented, there is no feedback endpoint defined in
the UAC2 gadget
> driver.
>
> Damn.
>
> Regards
> /Robert
>
>
>
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