Hi Ruslan, On 2/1/2021 3:44 AM, Ruslan Bilovol wrote: > Hi Minas and other USB experts, > > I'm currently developing new features for UAC1/UAC2 audio gadgets > like Volume/Mute controls which use Control SETUP + DATA OUT > transactions through ep0. > > While it works fine on BeagleBone black board with MUSB UDC, > on Raspberry Pi 4 with DWC2 UDC there is an issue. > > I found that when DWC2 receives ep0 SETUP + DATA OUT transaction, > it doesn't copy data transferred from the host to EP0 in DATA OUT stage > to the usb_request->buf buffer. This buffer contains unchanged data from > previous transactions. > Could you please send debug log with issue and usb trace. Thanks, Minas
