On Fri, May 06, 2016 at 09:50:00AM +0300, Felipe Balbi wrote: > > Hi Guenter, > > Guenter Roeck <linux@xxxxxxxxxxxx> writes: > > On Tue, Feb 09, 2016 at 07:01:20PM +0200, Heikki Krogerus wrote: > >> Hi, > >> > >> The OS, or more precisely the user space, needs to be able to control > >> a few things regarding USB Type-C ports. The first thing that must be > >> allowed to be controlled is the data role. USB Type-C ports will > >> select the data role randomly with DRP ports. When USB PD is > >> supported, also independent (from data role) power role swapping can > >> be supported together with Alternate Mode control. > >> > >> I'm proposing with this set a Class for the Type-C connectors that > >> gives the user space control over those things on top of getting basic > >> details about the USB Type-C connectors and also partners. The details > >> include the capabilities of the port, the supported data and power > >> roles, supported accessories (audio and debug), supported Alternate > >> Modes, USB PD support and of course the type of the partner (USB, Alt > >> Mode, Accessory or Charger), and more or less the same details about > >> the partner. > >> > >> I'm not considering cables with this Class, and I have deliberately > >> left out some more technical details, like cable orientation, firstly > >> because I did not see much use for the user space from knowing that > >> an secondly because that kind of details are not always available for > >> example with UCSI. > >> > >> So the interface to the user space is kept as simple as I dared to > >> make it. > >> > >> NOTE: In case there is somebody wondering, this is not adding USB PD > >> support to Linux kernel. This is just about USB Type-C. > >> > > > > Hello Heikki, > > > > we have implemented a prototype TCPM (USB Type-C Protocol Manager) > > software on top of your patch set. It will support TCPCI as well > > as other USB-C controllers such as FUSB302. The plan is to use > > this software in systems where no separate controller is available. > > > > Is there any chance to advance this patch set ? It would be instrumental > > to get a unified interface to user space. > > A newer version of $subject is already in Greg's queue [1] > > [1] https://git.kernel.org/cgit/linux/kernel/git/gregkh/usb.git/commit/?h=usb-next&id=0c1849a8c7af652c92ad0265a7ca5934fd773c69 No that only has the separated UCSI driver, not the class. -- heikki -- 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
