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Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux

From Lu Baolu <baolu.lu@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux
Date 2016-06-07 11:30 +0200
Message-ID <rHluG-Te-13@gated-at.bofh.it> (permalink)
References (7 earlier) <rGT5o-7iV-7@gated-at.bofh.it> <rGWPE-1F4-13@gated-at.bofh.it> <rHfIC-5zJ-5@gated-at.bofh.it> <rHiGt-7uM-13@gated-at.bofh.it> <rHjjc-7Z6-23@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Hi,

On 06/07/2016 02:34 PM, Jun Li wrote:
>> > On 06/07/2016 11:03 AM, Jun Li wrote:
>>> > > Hi Roger
>>> > >
>>>> > >>
>>>> > >> For Mux devices implementing dual-role, the mux device driver _must_
>>>> > >> use OTG/dual-role core API so that a common ABI is presented to user
>>>> > >> space for OTG/dual-role.
>>> > > That's the only point we have concern, do dual role switch through
>>> > > OTG/dual-role core, not do it by itself.
>> > 
>> > That really depends on how do you define "dual role". Can you please
>> > provide an unambiguous definition of "dual role" used in OTG/dual-role
>> > framework?
> Host and peripheral.
>

This is definitely ambiguous.

By reading OTG/dual-role code, my understanding is that "dual-role" is a
"reduced OTG" which is for DRD devices lacking of some OTG negotiation
protocols.

We really can't say "it's the scope of OTG/dual-role" whenever it comes to
"host and peripheral".

Best regards,
Lu Baolu

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Thread

[PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-02 03:40 +0200
  Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-03 09:50 +0200
    Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-06-03 10:20 +0200
      Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-03 11:30 +0200
    Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-03 18:10 +0200
      Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-04 04:40 +0200
        Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-05 09:00 +0200
          RE: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Jun Li <jun.li@nxp.com> - 2016-06-05 10:40 +0200
            Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-05 10:50 +0200
              RE: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Jun Li <jun.li@nxp.com> - 2016-06-06 03:10 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-06 04:40 +0200
              Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-06 04:20 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-06 04:50 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-06 09:00 +0200
          Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-06 03:40 +0200
            Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-06 05:10 +0200
              Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-06 09:10 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-06 09:40 +0200
              Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Roger Quadros <rogerq@ti.com> - 2016-06-06 09:10 +0200
                RE: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Jun Li <jun.li@nxp.com> - 2016-06-07 05:20 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-07 08:30 +0200
                RE: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Jun Li <jun.li@nxp.com> - 2016-06-07 09:10 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-07 11:30 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Roger Quadros <rogerq@ti.com> - 2016-06-07 14:50 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Lu Baolu <baolu.lu@linux.intel.com> - 2016-06-07 12:00 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Roger Quadros <rogerq@ti.com> - 2016-06-07 15:00 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-06-07 15:10 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Roger Quadros <rogerq@ti.com> - 2016-06-07 16:10 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-06-07 17:10 +0200
                RE: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Jun Li <jun.li@nxp.com> - 2016-06-08 05:10 +0200
                RE: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Jun Li <jun.li@nxp.com> - 2016-06-08 08:30 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Peter Chen <hzpeterchen@gmail.com> - 2016-06-08 08:40 +0200
                Re: [PATCH v10 2/7] usb: mux: add generic code for dual role port mux Roger Quadros <rogerq@ti.com> - 2016-06-08 10:00 +0200

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