Dne 22. 07. 20 v 17:25 harrison conroy napsal(a): > Hi Ruslan, > > I am working on a project that involves using an RPi 4 as a USB Gadget > and we have run into the feedback endpoint issue causing Windows 10 to > not recognize it as a USB audio device. Do you have any updates on this > patch for the community? Any help would be greatly appreciated. As a temporary workaround you can change the EP OUT type from USB_ENDPOINT_SYNC_ASYNC to USB_ENDPOINT_SYNC_ADAPTIVE. Or you can add implicit feedback flag to the EP IN. Win10 should handle implicit feedback OK, unlike Win7. Unfortunately linux still requires an explicit quirk for the implicit feedback https://www.spinics.net/lists/alsa-devel/msg111824.html . Yet it is still a workaround because IMO the existing EP IN is in fact not async but adaptive, clocked by the USB frames. Pavel.
