On tir, 2020-05-12 at 15:52 -0400, Alan Stern wrote: > On Tue, May 12, 2020 at 09:25:38PM +0200, Claus Stovgaard wrote: > > > > In a certain scenario I would like to force the dwc3 to only > > connect > > via superspeed and not fall back to USB2. > > > > What options exist for forcing the dwc3 to keep retry? > > The USB-3 spec forbids devices from operating only at SuperSpeed. > Devices must be able to connect at high speed, although possibly > with > reduced functionality. > > Alan Stern > I understand the requirement from the USB 3 specification. Though in the scenario for this specific device, it is not about comply with the USB 3 specification, but my question is rather what options I have for not comply with the specification here, and then force retry of USB 3, using the dwc3 as device. The device is in a fixed mounting with a fixed host. Sometimes when the host and device is powered up, it ends in high-speed instead of super- speed. I would like the option for "I will not be compliant with USB, but rather retry super-speed". Regards Claus
