On Dienstag, 8. September 2020 17:52:17 CEST Ludwig Nussel wrote:
> Stefan Brüns wrote:
> > On Freitag, 4. September 2020 17:43:37 CEST Ludwig Nussel wrote:
> >> Stefan Brüns wrote:
> >>> On Freitag, 4. September 2020 14:25:37 CEST Ludwig Nussel wrote:
> >>>> [...]
> >>>> Looking at "usb info" one can see that the gadget has two
> 
> endpoints. One
> 
> >>>> for input and one for output. Whereas real keyboards and also an
> 
> Arduino
> 
> >>>> pretending to be a keyboard only has an input endpoint. Could that be
> >>>> relevant?
> >>>> I couldn't find how to disable the second endpoint via configfs though.
> > 
> > [...]
> > You may try this patch:
> > https://build.opensuse.org/package/view_file/
> > home:StefanBruens:branches:hardware:boot/u-boot/0001-usb-kbd-Also-accept-
> > keyboards-with-Interrupt-OUT-end.patch?expand=1
> 
> So with your patch and
> https://build.opensuse.org/package/view_file/home:lnussel:branches:hardware:
> boot/u-boot/0001-Fix-RPi-2-3-USB-keyboard.patch

I have something similar cooking. Actually, I would avoid the extra CONFIG 
option and just always use Get_Report for the initial state, and only use the 
Interrupt pipe for event polling later.

Can you try if setting CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE also works? As 
far as I can see this does not check for a non-empty response, but just 
creates the queue. Nb, CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE is the default 
for Allwinner SoCs.

> it works! Are you planning to send yours upstream?

Yes, definitely, just a matter of limited time.

Kind regards, Stefan

-- 
Stefan Brüns  /  Bergstraße 21  /  52062 Aachen
phone: +49 241 53809034     mobile: +49 151 50412019

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