Re: Inaccessible dual-role port on CherryTrail

2018-10-02 Thread Rob Weber
On Wed, Sep 19, 2018 at 02:36:17PM +0300, Heikki Krogerus wrote: > > I noticed that bits [21:20] are set as 0b11. The datasheet describes > > these bits as software configuration of the OTG_ID signal functionality. > > With these bits set, does that mean that the OS is expected to be > > configurin

Re: Inaccessible dual-role port on CherryTrail

2018-09-19 Thread Heikki Krogerus
On Fri, Sep 14, 2018 at 02:59:49PM -0700, Rob Weber wrote: > On Fri, Sep 14, 2018 at 11:09:15AM +0300, Heikki Krogerus wrote: > > Adding Hans. Hans has become something of a Cherry Trail expert. > > Hello Hans. Yesterday I was reading through your blog posts that describe > your work with the GPD

Re: Inaccessible dual-role port on CherryTrail

2018-09-14 Thread Heikki Krogerus
Hi Rob, Adding Hans. Hans has become something of a Cherry Trail expert. On Thu, Sep 13, 2018 at 03:40:12PM -0700, Rob Weber wrote: > Hi linux-usb, > > I'm currently bringing up a custom board that uses a CherryTrail > processor and I'm having quite a bit of trouble accessing the dual-role > por

Re: Inaccessible dual-role port on CherryTrail

2018-09-14 Thread Rob Weber
On Fri, Sep 14, 2018 at 09:00:30AM +0200, Greg KH wrote: > > I'm running a 4.9.115 kernel built using Yocto with a few patches applied > > to enable HDMI audio. > > 4.9 is really old by now, and lots and lots of USB-C and dwc3 and xhci > changes have happened in the almost 2 years since that kerne

Re: Inaccessible dual-role port on CherryTrail

2018-09-14 Thread Greg KH
On Thu, Sep 13, 2018 at 03:40:12PM -0700, Rob Weber wrote: > Hi linux-usb, > > I'm currently bringing up a custom board that uses a CherryTrail > processor and I'm having quite a bit of trouble accessing the dual-role > port from Linux. > > Our system includes two USB 3.0-capable ports with Type-

Inaccessible dual-role port on CherryTrail

2018-09-13 Thread Rob Weber
Hi linux-usb, I'm currently bringing up a custom board that uses a CherryTrail processor and I'm having quite a bit of trouble accessing the dual-role port from Linux. Our system includes two USB 3.0-capable ports with Type-C connectors. One port is designed to be a host-only port (downstream-fac