Hi all:
I've experienced the same issue with v3.5.4 using both AD1 and AD2 with SDK for an embedded project.
If I place in the cmdline.txt dwc_otg.speed=1 , The RPI improves and hangs disappear at the beginning, but after several minutes working with AD the errors appear again " DPTIo failed: ERC 0x2" and I have to shutdown my tests.
Any clue to workaround these problems?