Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1334534

Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface

From Oliver Neukum <oneukum@suse.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface
Date 2016-02-15 16:40 +0100
Message-ID <r2tpL-2SR-7@gated-at.bofh.it> (permalink)
References (1 earlier) <r0jXB-76q-39@gated-at.bofh.it> <r0lcZ-7On-1@gated-at.bofh.it> <r0AlI-YK-5@gated-at.bofh.it> <r0GKv-5hG-13@gated-at.bofh.it> <r106v-1qh-39@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

On Thu, 2016-02-11 at 15:50 +0200, Heikki Krogerus wrote:
> Because USB Type-C ports (DRP ones) will select the data role randomly
> when you connect (to an other DRP port). USB Type-C spec defines that
> you can "prefer" host mode, but when both ends prefer host mode, it's
> +-0.

That question has not been answered. It would be awkward for the OS
to find itself in the slave role, which it is ill equipped for. So
the data role should be switched before the new device is announced
to user space. How is that handled?

	Regards
		Oliver

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-09 18:10 +0100
  [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-09 18:10 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Greg KH <gregkh@linuxfoundation.org> - 2016-02-09 19:30 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-10 11:40 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Greg KH <gregkh@linuxfoundation.org> - 2016-02-10 18:30 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-11 15:10 +0100
            Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-15 16:40 +0100
              Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-16 10:30 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-16 14:50 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-17 09:00 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-17 10:10 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbif@gmail.com> - 2016-02-17 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-17 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-17 12:20 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbi@kernel.org> - 2016-02-17 14:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-17 15:30 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Peter Chen <hzpeterchen@gmail.com> - 2016-02-18 10:20 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 11:50 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Rajaram R <rajaram.officemail@gmail.com> - 2016-02-18 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 11:50 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Rajaram R <rajaram.officemail@gmail.com> - 2016-02-18 12:10 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbi@kernel.org> - 2016-02-17 14:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-17 15:00 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbif@gmail.com> - 2016-02-18 08:10 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-18 11:30 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Felipe Balbi <balbif@gmail.com> - 2016-02-18 11:40 +0100
                Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-18 11:50 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Peter Chen <hzpeterchen@gmail.com> - 2016-02-18 10:40 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-18 10:50 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 12:30 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-10 13:10 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-10 13:00 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 14:30 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-10 15:10 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Bjørn Mork <bjorn@mork.no> - 2016-02-10 16:20 +0100
            Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-11 09:30 +0100
              Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Bjørn Mork <bjorn@mork.no> - 2016-02-11 10:10 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 15:20 +0100
        Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-10 15:30 +0100
          Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.de> - 2016-02-10 16:20 +0100
            Fwd: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-02-11 09:20 +0100
              Re: Fwd: [PATCH 2/3] usb: type-c: USB Type-C Connector System  Software Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-11 15:20 +0100
    Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Oliver Neukum <oneukum@suse.com> - 2016-02-10 14:10 +0100
      Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software  Interface Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-11 15:10 +0100
  [PATCH 3/3] usb: type-c: UCSI ACPI driver Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-09 18:10 +0100
    Re: [PATCH 3/3] usb: type-c: UCSI ACPI driver Greg KH <gregkh@linuxfoundation.org> - 2016-02-09 19:30 +0100
      Re: [PATCH 3/3] usb: type-c: UCSI ACPI driver Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-10 11:30 +0100
  Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Oliver Neukum <oneukum@suse.com> - 2016-02-17 20:00 +0100
    Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 10:30 +0100
  Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Rajaram R <rajaram.officemail@gmail.com> - 2016-02-17 20:40 +0100
    Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-02-18 12:10 +0100
      Re: [PATCH 0/3] usb: USB Type-C Class and driver for UCSI Oliver Neukum <oneukum@suse.com> - 2016-02-18 12:20 +0100

csiph-web