Re: [PATCH v1 0/9] Support UDC on Tegra 20/30/114/124

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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?

-- 

Best Regards,
Peter Chen
--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [ARM Kernel]     [Linux ARM]     [Linux ARM MSM]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux