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

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Date:   Thu, 08 Aug 2019 12:51:20 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Jochen Sprickerhof <jochen@...ickerhof.de>,
        Anand Moon <linux.amoon@...il.com>
Subject: Re: [PATCH v2 2/2 RESEND] usb: dwc3: remove generic PHY calibrate() calls


Hi,

Marek Szyprowski <m.szyprowski@...sung.com> writes:

> 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.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Tested-by: Anand Moon <linux.amoon@...il.com>
> Tested-by: Jochen Sprickerhof <jochen@...ickerhof.de>
> ---
>  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);

are you sure you're the only one using phy_calibrate()? I don't want any
regressions because of this :-p

-- 
balbi

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