On Thu, Jul 2, 2020 at 7:55 PM Jun Li <lijun.kernel@xxxxxxxxx> wrote: > John Stultz <john.stultz@xxxxxxxxxx> 于2020年7月3日周五 上午5:46写道： > > I was curious if you or anyone else had any thoughts on how to debug > > this further? > > If you force your gadget to be USB2(e.g. in dts) > > + maximum-speed = "high-speed"; > > will you still reproduce this issue? Thanks for the suggestion! Unfortunately, I gave that a try, but still reproduced the same issue with this setting. Curious, what the issue is your were thinking this would help with? > Does your gadget connect to host super speed port directly via a C-to-A cable > in your test labs? or there is something between? I'm not sure of the details in the lab, however I can reproduce this on my desk with a Host machine <-> USB hub <-> USB-C port. Additionally, the board itself is a little complicated, in that the USB-C port is USB2 only (however, it does have two USB-A USB3 ports behind an on-board hub and a switch to decide if the USB-C or hub ports are enabled since there is only one usb controller). thanks -john
