linux-kernel - Re: [PATCH v2 2/2] usb: dwc3: remove generic PHY calibrate() calls

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Date:   Sun, 28 Jul 2019 17:58:56 +0200
From:   Jochen Sprickerhof <jochen@...ickerhof.de>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     Anand Moon <linux.amoon@...il.com>,
        Linux USB Mailing List <linux-usb@...r.kernel.org>,
        linux-samsung-soc@...r.kernel.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Felipe Balbi <balbi@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: Re: [PATCH v2 2/2] usb: dwc3: remove generic PHY calibrate() calls

Hi Marek,

Tested on my XU4
Tested-by: Jochen Sprickerhof <jochen@...ickerhof.de>

* Anand Moon <linux.amoon@...il.com> [2019-07-23 00:30]:
>Hi Marek,
>
>On Fri, 19 Jul 2019 at 13:43, Marek Szyprowski <m.szyprowski@...sung.com> wrote:
>>
>> Calls to USB2 generic PHY calibrate() method has been moved to HCD core,
>> which now successfully handles generic PHYs and their calibration after
>> every HCD reset. This fixes all the timing issues related to PHY
>> calibration done directly from DWC3 driver: incorrect operation after
>> system suspend/resume or USB3.0 detection failure when XHCI-plat driver
>> compiled as separate module.
>>
>
>Tested on my XU3 / XU4 / HC1
>Tested-by: Anand Moon <linux.amoon@...il.com>
>
>
>> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
>> ---
>>  drivers/usb/dwc3/core.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
>> index c9bb93a2c81e..7dd6d419254d 100644
>> --- a/drivers/usb/dwc3/core.c
>> +++ b/drivers/usb/dwc3/core.c
>> @@ -168,7 +168,6 @@ static void __dwc3_set_mode(struct work_struct *work)
>>                                 otg_set_vbus(dwc->usb2_phy->otg, true);
>>                         phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
>>                         phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
>> -                       phy_calibrate(dwc->usb2_generic_phy);
>>                 }
>>                 break;
>>         case DWC3_GCTL_PRTCAP_DEVICE:
>> @@ -1166,7 +1165,6 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
>>                                 dev_err(dev, "failed to initialize host\n");
>>                         return ret;
>>                 }
>> -               phy_calibrate(dwc->usb2_generic_phy);
>>                 break;
>>         case USB_DR_MODE_OTG:
>>                 INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
>> --
>> 2.17.1
>>
>

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