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Sun, 11 Jul 2021 08:15:31 +0000 Received: from DM4PR12MB5390.namprd12.prod.outlook.com ([fe80::d97c:7079:8a93:cd4]) by DM4PR12MB5390.namprd12.prod.outlook.com ([fe80::d97c:7079:8a93:cd4%3]) with mapi id 15.20.4308.026; Sun, 11 Jul 2021 08:15:31 +0000 X-SNPS-Relay: synopsys.com From: Minas Harutyunyan To: Martin Blumenstingl CC: Alan Stern , Matt Corallo , "linux-usb@vger.kernel.org" , "linux-amlogic@lists.infradead.org" , "linux.amoon@gmail.com" , Artur Petrosyan Subject: Re: ODROID-C1/-C2 USB Detection only triggered by some devices dwc2 Thread-Topic: ODROID-C1/-C2 USB Detection only triggered by some devices dwc2 Thread-Index: AQHXdizqoaSvbv4TcUGwLN6CtBbUjQ== Date: Sun, 11 Jul 2021 08:15:31 +0000 Message-ID: References: <0badab7c-f12e-e9ed-2f90-2cf5f25f4038@bluematt.me> <20210628005825.GA638648@rowland.harvard.edu> <20210628011628.GC638648@rowland.harvard.edu> <0c62655d-738c-4d71-6b7b-fe7fa90b54e3@bluematt.me> <20210628142418.GC656159@rowland.harvard.edu> <20210629150541.GB699290@rowland.harvard.edu> <20210629161807.GB703497@rowland.harvard.edu> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (Windows NT 10.0; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Hi Martin, On 7/10/2021 9:07 PM, Martin Blumenstingl wrote: > Hi Minas, > > On Thu, Jul 1, 2021 at 1:09 AM Martin Blumenstingl > wrote: >> >> Hi Minas, >> > It's been a week since I sent my last mail > In case you are taking some days off: enjoy that time! > Please let us know if you have any questions about this as we're > looking forward to some hints on how to debug (and of course fix!) > this. > First of all sorry for late feedback. I missed this email thread because in the subject there are no "dwc2" and my Outlook not move it to "dwc2" folder of my mailbox based on rules. Today, because of rear count of emails in linux-usb I was able to catch it. I have added "dwc2" word in subject to avoid this situation later. Couple of questions to understand the case. 1. Is it work normally earlier? If it was works fine earlier then which Kernel version and after which version broke? 2. Do you saw in dmesg: dwc2_core_reset: HANG! Soft Reset timeout GRSTCTL_CSFTRST If yes, then PHY not initialized correctly. Core can't reset if some clocks from PHY are not available. 3. During our recent testings we met the issue with PHY driver. Artur found a bug in phy_generic driver and submitted patch on July 10: [PATCH v2] usb: phy: Fix page fault from usb_phy_uevent In your case, as I understand correctly, used drivers/phy/amlogic/phy-meson8b-usb2.c. Could you please check if same issue exist there. 4. Can you provide full debug log for failed case? 5. I would preferred to see output of 'lsusb -t' for pass and fail cases. Thanks, Minas > > Best regards, > Martin > _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic