Hi, On 23/06/16 15:00, Heikki Krogerus wrote: > Hi Oliver, > > On Thu, Jun 23, 2016 at 10:38:58AM +0200, Oliver Neukum wrote: >> On Thu, 2016-06-23 at 11:23 +0300, Heikki Krogerus wrote: >>> On Wed, Jun 22, 2016 at 06:44:18PM +0200, Oliver Neukum wrote: >> >>> No it's not. DRP means a port that can operate as _either_ Source >>> (host) or Sink (device), but not at the same time.. >> >> Yes, but it is unclear what you will be after a connection >> and that's the point. > > Which is a fact that we can do nothing about. The role after > connection with DRP ports will be dictated by the partner or selected > randomly in case the partner is also DRP. We can prefer a role, but > that in the end guarantees nothing. So if the role that we end up with > after connection (seen in current_data_role) does not satisfy us, all > we can do is try to swap it. > > I'm not sure what is your point here. What if the application wants to know exactly what role the device is operating in at the current moment? We need to have 2 distinct parameters. 1) supported_modes : host, device, host or device 2) current_mode: host, device, disconnected -- cheers, -roger -- 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
