Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Fri, 22 Jan 2021 16:15:40 +0900
From:   Jung Daehwan <dh10.jung@samsung.com>
To:     Wesley Cheng <wcheng@codeaurora.org>,
        Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
        Daehwan Jung <dh10.jung@samsung.com>
Cc:     Felipe Balbi <balbi@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "open list:DESIGNWARE USB3 DRD IP DRIVER" <linux-usb@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: Re: usb: dwc3: gadget: skip pullup and set_speed after suspend
Message-ID: <20210122071540.GB121941@ubuntu>
Reply-To: eg Kroah-Hartman <gregkh@linuxfoundation.org>
MIME-Version: 1.0
In-Reply-To: <20210122064125.GA121941@ubuntu>
User-Agent: Mutt/1.5.24 (2015-08-30)
Content-Type: multipart/mixed;
        boundary="----WZLI4USkVYiVjVtGawWGutc5pNztY3GR2qy8kqsclN4GFAmP=_2224e_"
CMS-TYPE: 102P
DLP-Filter: Pass
References: <CGME20210122065248epcas2p19a972d3a385b91d6e05a16f2ef7b0dd6@epcas2p1.samsung.com>
        <20210122064125.GA121941@ubuntu>
Precedence: bulk

------WZLI4USkVYiVjVtGawWGutc5pNztY3GR2qy8kqsclN4GFAmP=_2224e_
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline

On Fri, Jan 22, 2021 03:32, Wesley cheng wrote:
> Hi Daehwan,
> 
> If this is an unexpected event where userspace initiates the UDC bind
> sequence, then after the above sequence occurs, the DWC3 device should
> still be able to re-enter runtime suspend after the autosuspend timer
> expires.  Since the cable is disconnected, the dwc->connected flag would
> still be false.  Is this not happening in your situation?
> 
> I'm just trying to understand what issue you're seeing other than the
> momentary transition from runtime suspend (due to cable disconnect)
> -->runtime resume (due to unexpected UDC bind) --> runtime  suspend (due
> to nothing connected).
> 
> Thanks
> Wesley cheng

Hi Wesley,

I don't know why but DWC3 device is not re-entering runtime-suspend in
my situation. I'm still debugging it.
Even if DWC3 re-enter runtime-suspend but it doesn't mean stopping gadget.
Are you stopping gadget manually in this case?

Best Regards,
Jung Daehwan

------WZLI4USkVYiVjVtGawWGutc5pNztY3GR2qy8kqsclN4GFAmP=_2224e_
Content-Type: text/plain; charset="utf-8"


------WZLI4USkVYiVjVtGawWGutc5pNztY3GR2qy8kqsclN4GFAmP=_2224e_--