On 07.07.2017 04:12, Peter Chen wrote: > On Thu, Jul 06, 2017 at 01:13:01AM +0300, Dmitry Osipenko wrote: >> On 05.07.2017 23:31, Stephen Warren wrote: >>> On 07/05/2017 11:19 AM, Dmitry Osipenko wrote: >>>> Some time ago Thierry Reding sent out patches that enabled UDC on NVIDIA >>>> Tegra, unfortunately they haven't got enough traction to get into the >>>> kernel. I've rebased those patches and added a fix for the Ethernet USB >>>> Gadget on Tegra20, Marc Dietrich tested UDC driver on AC100 and Nicolas >>>> Chauvet on TK1. Like an original patchset, this series adds support for >>>> the peripheral mode only. >>> >>> Does this mean that the relevant ports no longer support host mode? That's going >>> to be a user-visible regression, which doesn't sound like a good idea. Isn't OTG >>> possible instead? >> >> We are going to switch only AC100 and TrimSlice to use the UDC driver. Do you >> know whether that port is working in a host mode with the tegra-ehci driver on >> these devices? That should be a micro USB port. Since that port is working in a >> device mode by default, I presume that switching it into a host mode would >> require some extra 'dance', otherwise I may drop the AC100 / TrimSlice patches. >> >> The full-featured OTG should be possible, it could be done later if desired. I'm >> leaving it to somebody else to implement. >> > > Full-featured OTG? Do you mean it is compliances OTG spec, or just > support dual-role switch through ID pin or external connector? > I meant the dual-role. -- Dmitry -- 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
