linux-kernel - Re: [PATCH v2 0/4] usb: dwc3: dual-role support

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Date:   Mon, 13 Mar 2017 10:33:39 +0200
From:   Roger Quadros <rogerq@...com>
To:     <balbi@...nel.org>
CC:     <vivek.gautam@...eaurora.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/4] usb: dwc3: dual-role support

Felipe,

On 16/02/17 15:06, Roger Quadros wrote:
> Hi,
> 
> We rely on the OTG controller block or Extcon to provide us with
> VBUS and ID line status via an interrupt.
> 
> This is then used to switch the controller between host, peripheral
> and idle roles based on the following table.
> 
>     ID  VBUS    dual-role state
>     --  ----    ---------------
>     0   x       A_HOST - Host controller active
>     1   0       B_IDLE - Both Host and Gadget controllers inactive
>     1   1       B_PERIPHERAL - Gadget controller active
> 
> Series depends on
> [1] dwc3 trivial fixes - https://lkml.org/lkml/2017/2/15/204

Would appreciate any feedback on this series. Thanks.

> 
> Changelog:
> v2:
> - Use extcon device for VBUS/ID events if extcon phandle is present.
> - Fix bugs during system suspend/resume.
> 
> cheers,
> -roger
> 
> Roger Quadros (4):
>   usb: dwc3: core.h: add some register definitions
>   usb: dwc3: omap: don't miss events during suspend/resume
>   usb: dwc3: add dual-role support
>   usb: dwc3: Workaround for super-speed host on dra7 in dual-role mode
> 
>  Documentation/devicetree/bindings/usb/dwc3.txt |   2 +
>  drivers/usb/dwc3/core.c                        | 752 ++++++++++++++++++++++++-
>  drivers/usb/dwc3/core.h                        | 131 ++++-
>  drivers/usb/dwc3/dwc3-omap.c                   |  16 +
>  drivers/usb/dwc3/gadget.c                      |  18 +-
>  5 files changed, 895 insertions(+), 24 deletions(-)
> 

-- 
cheers,
-roger