Re: [PATCH 2/2] ARM: dts: omap5: Add dr_mode for dwc3

[Dmitry Lifshitz]

Hi,

On 09/08/2014 04:24 PM, Felipe Balbi wrote:
> Hi,
>
> On Mon, Sep 08, 2014 at 02:34:33PM +0300, Dmitry Lifshitz wrote:
> > Hi Felipe, Roger
> >
> > On 04/16/2014 07:16 PM, Felipe Balbi wrote:
> > > On Fri, Oct 11, 2013 at 05:46:12PM +0300, Roger Quadros wrote:
> > > > Hi,
> > > >
> > > > On 10/10/2013 01:49 PM, Kishon Vijay Abraham I wrote:
> > > > > From: George Cherian <george.cherian@xxxxxx>
> > > > >
> > > > > Added dr_mode property in dwc3 and set its default mode to device.
> > > >
> > > > If there is a specific reason why this is not set to "otg", we need
> > > > to explain it here.
> > > >
> > > > AFAIK the port is meant to be used as OTG port.
> > >
> > > we still don't have the workaround for dual role ports, I've been
> > > working on it but still need to retest and make sure it's working fine
> > > before merging upstream.
> >
> >
> > Does the OTG port suppose to work with OMAP5? I mean role switching
> > mechanism?
> >
> > I'm testing kernel v3.16 with OMAP5 based board (CM-T54).
> >
> > If I set CONFIG_USB_DWC3_DUAL_ROLE, than nothing is going on when I plug
> > some device/host cable into micro USB3.0 port (VBUS/ID detection with extcon
> > events works fine).
>
> Dual role does not work. We allow the driver to the built with both Host
> and Peripheral support because some platforms have more than one port
> and building the driver with dual role allows us to make one port host
> and one peripheral.

Please, can you provide some detail about platforms with several ports.
How do that ports are connected to DWC3?


Thanks,

Dmitry


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