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Re: [RFC PATCHv2] usb: USB Type-C Connector Class

From Guenter Roeck <linux@roeck-us.net>
Newsgroups linux.kernel
Subject Re: [RFC PATCHv2] usb: USB Type-C Connector Class
Date 2016-06-01 15:40 +0200
Message-ID <rFexj-yn-13@gated-at.bofh.it> (permalink)
References (5 earlier) <rEQEG-2x9-33@gated-at.bofh.it> <rERhn-2Kk-1@gated-at.bofh.it> <rEVEm-5CE-29@gated-at.bofh.it> <rF9Hj-60K-1@gated-at.bofh.it> <rFak1-6tA-25@gated-at.bofh.it>
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On 06/01/2016 02:04 AM, Oliver Neukum wrote:
> On Wed, 2016-06-01 at 11:23 +0300, Heikki Krogerus wrote:
>> I think we can still add them later if they are still seen as
>> necessity later on, tough I seriously doubt it. It would not be
>> ideal, but adding an attribute should not really break anything,
>> right? Removing would.
>
> However, how do we learn that the other side has triggered a reset?
>

USB PD specification, section 6.8.2.2 (Modal Operation and Hard Reset):

A Hard Reset shall cause all Active Modes to be exited by both Port Partners
and any Cable Plugs (see Section 6.4.4.3.4).

Section 6.4.4.3.4 (Enter Mode Command):

The following events shall also cause the Port Partners and Cable Plug(s) to exit all Active Modes:
- A PD Hard Reset
- The Port Partners or Cable Plug(s) are Detached
- A Cable Reset (only exits the Cable Plug’s Active Modes)

The class code would not explicitly learn about the reset,
but it would be informed about the exited modes.

Guenter

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Thread

Re: [RFC PATCHv2] usb: USB Type-C Connector Class Oliver Neukum <oneukum@suse.com> - 2016-05-31 11:00 +0200
  Re: [RFC PATCHv2] usb: USB Type-C Connector Class Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-05-31 14:10 +0200
    Re: [RFC PATCHv2] usb: USB Type-C Connector Class Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-05-31 14:50 +0200
      Re: [RFC PATCHv2] usb: USB Type-C Connector Class Guenter Roeck <linux@roeck-us.net> - 2016-05-31 19:30 +0200
        Re: [RFC PATCHv2] usb: USB Type-C Connector Class Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-06-01 10:30 +0200
          Re: [RFC PATCHv2] usb: USB Type-C Connector Class Oliver Neukum <oneukum@suse.com> - 2016-06-01 10:40 +0200
          Re: [RFC PATCHv2] usb: USB Type-C Connector Class Oliver Neukum <oneukum@suse.com> - 2016-06-01 11:10 +0200
            Re: [RFC PATCHv2] usb: USB Type-C Connector Class Guenter Roeck <linux@roeck-us.net> - 2016-06-01 15:40 +0200
              Re: [RFC PATCHv2] usb: USB Type-C Connector Class Oliver Neukum <oneukum@suse.com> - 2016-06-02 08:30 +0200
                Re: [RFC PATCHv2] usb: USB Type-C Connector Class Guenter Roeck <linux@roeck-us.net> - 2016-06-02 08:40 +0200
                Re: [RFC PATCHv2] usb: USB Type-C Connector Class Oliver Neukum <oneukum@suse.com> - 2016-06-02 09:50 +0200

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