Re: USB DWC2 stops responding when insert/remove cable multiple times

[Minas Harutyunyan <Minas.Harutyunyan-HKixBCOQz3hWk0Htik3J/w@public.gmane.org>]

Hi Otavio,


On 2/19/2020 7:10 PM, Otavio Salvador wrote:
> Hello Minas,
> 
> On Wed, Feb 19, 2020 at 9:26 AM Minas Harutyunyan
> <Minas.Harutyunyan@synopsys.com> wrote:
>> On 2/17/2020 11:53 PM, Otavio Salvador wrote:
>>> On Mon, Feb 17, 2020 at 10:26 AM Minas Harutyunyan
>>> <Minas.Harutyunyan@synopsys.com> wrote:
>>>> Enable debug prints to get full dwc2 debug prints to see what happen
>>>> with dwc2.
>>
>>> [ 1054.529774] dwc2 30180000.usb: ep0 state:0
>>> [ 1054.529785] dwc2 30180000.usb: dwc2_hsotg_start_req: DxEPCTL=0x84088200
>>> [ 1054.529801] dwc2 30180000.usb: dwc2_hsotg_start_req: DXEPCTL=0x80088200
>>> [ 1054.529928] dwc2 30180000.usb: ep2out: req 26bd9b9f: 512@06b7dbca,
>>> noi=0, zero=0, snok=0
>>> [ 1054.537095] dwc2 30180000.usb: dwc2_hsotg_irq: 04008428 00000400
>>> (d88c3cc4) retry 8
>>> [ 1054.537119] dwc2 30180000.usb: GINTSTS_ErlySusp
>>> [ 1054.540147] dwc2 30180000.usb: gintsts=04008828  gintmsk=d88c3cc4
>>> [ 1054.540172] dwc2 30180000.usb: USB SUSPEND
>>> [ 1054.540191] dwc2 30180000.usb: dwc2_handle_usb_suspend_intr: DSTS=0x5ad801
>>> [ 1054.540211] dwc2 30180000.usb: DSTS.Suspend Status=1 HWCFG4.Power
>>> Optimize=1 HWCFG4.Hibernation=0
>>> [ 1054.540242] dwc2 30180000.usb: dwc2_hsotg_irq: 04008028 00000000
>>> (d88c3cc4) retry 8
>>> [ 1054.585402] dwc2 30180000.usb: ep1in: req 01eff31b: 353@bf8d62d8,
>>> noi=0, zero=1, snok=0
>>> [ 1054.585422] dwc2 30180000.usb: dwc2_hsotg_ep_queue: submit request
>>> only in active state
>>> [ 1054.661667] dwc2 30180000.usb: dwc2_hsotg_irq: 04008428 00000400
>>> (d88c3cc4) retry 8
>>> [ 1054.661694] dwc2 30180000.usb: GINTSTS_ErlySusp
>>> [ 1054.664715] dwc2 30180000.usb: gintsts=04008828  gintmsk=d88c3cc4
>>> [ 1054.664741] dwc2 30180000.usb: USB SUSPEND
>>> [ 1054.664760] dwc2 30180000.usb: dwc2_handle_usb_suspend_intr: DSTS=0x5ad801
>>> [ 1054.664781] dwc2 30180000.usb: DSTS.Suspend Status=1 HWCFG4.Power
>>>
>>
>> Actually, I don't see any issue with dwc2 from the log. Only not clear
>> why SUSPEND happen hear. Is it because of disconnect/connect or
>> reloading g_serial?
>> Is this log recorded when issue seen?
> 
> Yes, the log was recorded however we did not reload the g_serial
> module. So when we gathered the logs, it was stuck.
> 
>> Anyway, before SUSPEND and after dwc2 successfully perform transfers on
>> all EP's - ep1in bulk, ep2out bulk and ep3in interrupt.
>> Can you provide dmesg with dwc2 debug prints with exception case inside.
> 
> The log I sent was taken with:
> 
> 1) boot device
> 2) ran 'dmesg -c' so we cleaned the old messages
> 3) cause the lock up to happen
> 4) gather dmesg output
> 
> What sequence do you want us to do?

Yes. Can you provide also USB trace?

Thanks,
Minas


> --
> Otavio Salvador                             O.S. Systems
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ossystems.com.br&d=DwIBaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=6z9Al9FrHR_ZqbbtSAsD16pvOL2S3XHxQnSzq8kusyI&m=LRZmjUC_RsqI1Ky9A0SkfCqicsDkCoHnGnXttwUlXec&s=815r-d3BXkFFJtIB2EQ8OA2fcr6ooNEpbYfvoARbD3s&e=         https://urldefense.proofpoint.com/v2/url?u=http-3A__code.ossystems.com.br&d=DwIBaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=6z9Al9FrHR_ZqbbtSAsD16pvOL2S3XHxQnSzq8kusyI&m=LRZmjUC_RsqI1Ky9A0SkfCqicsDkCoHnGnXttwUlXec&s=O1psrp_ccT1F6H678r50HId1cWn6g8UxKWstZ_kBzO8&e=
> Mobile: +55 (53) 9 9981-7854          Mobile: +1 (347) 903-9750
>