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 <20190719081212.9249-1-m.szyprowski@samsung.com> <20190719081326.9347-1-m.szyprowski@samsung.com>
In-Reply-To: <20190719081326.9347-1-m.szyprowski@samsung.com>
From:   Anand Moon <linux.amoon@gmail.com>
Date:   Tue, 23 Jul 2019 00:30:48 +0530
Message-ID: <CANAwSgQSQLVy=E3uzDq_sdmBR7Rcg=S1Tfr24o3DozHSP2wKiw@mail.gmail.com>
Subject: Re: [PATCH v2 2/2] usb: dwc3: remove generic PHY calibrate() calls
To:     Marek Szyprowski <m.szyprowski@samsung.com>
Cc:     Linux USB Mailing List <linux-usb@vger.kernel.org>,
        linux-samsung-soc@vger.kernel.org,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Mathias Nyman <mathias.nyman@intel.com>,
        Felipe Balbi <balbi@kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Jochen Sprickerhof <jochen@sprickerhof.de>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Marek,

On Fri, 19 Jul 2019 at 13:43, Marek Szyprowski <m.szyprowski@samsung.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@gmail.com>


> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.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
>