On 28/03/17 14:10, Felipe Balbi wrote: > > Hi, > > Roger Quadros <rogerq@xxxxxx> writes: >> dra7 OTG core limits the host controller to USB2.0 (high-speed) mode >> when we're operating in dual-role. > > yeah, that's not a quirk. DRA7 supports OTGv2, not OTGv3. There was no > USB3 when OTGv2 was written. > > DRA7 just shouldn't use OTG core altogether. In fact, this is the very > thing I've been saying for a long time. Make the simplest implementation > possible. The dead simple, does-one-thing-only sort of implementation. > > All we need for Dual-Role (without OTG extras) is some input for ID and > VBUS, then we add/remove HCD/UDC conditionally and set PRTCAPDIR. > The catch is that on AM437x there is no way to get ID and VBUS events other than the OTG controller so we have to rely on the OTG controller for that. :( I agree on the simplicity part. Let's do what minimal is necessary first. cheers, -roger -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
