linux-kernel - Re: [PATCH v2 04/10] usb: dwc3: Add two quirks for Hisilicon Kirin Soc Platform

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Message-ID: <d5f8db99-15bf-51a7-553f-c97cf2b70cfd@huawei.com>
Date:   Mon, 18 Feb 2019 20:31:52 +0800
From:   Chen Yu <chenyu56@...wei.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
CC:     <liuyu712@...ilicon.com>, USB <linux-usb@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        Suzhuangluan <suzhuangluan@...ilicon.com>,
        Kongfei <kongfei@...ilicon.com>, <wanghu17@...ilicon.com>,
        <butao@...ilicon.com>, Yao Chen <chenyao11@...wei.com>,
        <fangshengzhou@...ilicon.com>, <lipengcheng8@...wei.com>,
        songxiaowei <songxiaowei@...ilicon.com>,
        xu yiping <xuyiping@...ilicon.com>, <xuyoujun4@...wei.com>,
        <yudongbin@...ilicon.com>, <zangleigang@...ilicon.com>,
        Felipe Balbi <balbi@...nel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Binghui Wang <wangbinghui@...ilicon.com>
Subject: Re: [PATCH v2 04/10] usb: dwc3: Add two quirks for Hisilicon Kirin
 Soc Platform

Hi,

On 2019/2/18 20:21, Andy Shevchenko wrote:
> On Mon, Feb 18, 2019 at 1:23 PM Yu Chen <chenyu56@...wei.com> wrote:
>>
>> There are tow quirks for DesignWare USB3 DRD Core of Hisilicon Kirin Soc.
>> 1)SPLIT_BOUNDARY_DISABLE should be set for Host mode
>> 2)A GCTL soft reset should be executed when switch mode
> 
> Thus, it must be two patches, no?
> 
>> +static void dwc3_gctl_core_soft_reset(struct dwc3 *dwc)
>> +{
>> +       u32 reg;
>> +
>> +       reg = dwc3_readl(dwc->regs, DWC3_GCTL);
> 
>> +       reg |= (DWC3_GCTL_CORESOFTRESET);
> 
> Redundant parens.
> 
>> +       dwc3_writel(dwc->regs, DWC3_GCTL, reg);
>> +
>> +       reg = dwc3_readl(dwc->regs, DWC3_GCTL);
> 
>> +       reg &= ~(DWC3_GCTL_CORESOFTRESET);
> 
> Ditto.
> 
>> +       dwc3_writel(dwc->regs, DWC3_GCTL, reg);
>> +}
> 
>> +static void dwc3_complete(struct device *dev)
>> +{
> 
>> +       struct dwc3     *dwc = dev_get_drvdata(dev);
>> +       u32             reg;
> 
> Indentation style is different to the other functions in the same patch.
> Use simple space here.
> 
>> +       if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST &&
>> +                       dwc->dis_split_quirk) {
>> +               dev_dbg(dwc->dev, "set DWC3_GUCTL3_SPLITDISABLE\n");
>> +               reg = dwc3_readl(dwc->regs, DWC3_GUCTL3);
>> +               reg |= DWC3_GUCTL3_SPLITDISABLE;
>> +               dwc3_writel(dwc->regs, DWC3_GUCTL3, reg);
>> +       }
>> +}
> 
>> --- a/drivers/usb/dwc3/gadget.c
>> +++ b/drivers/usb/dwc3/gadget.c
>> @@ -269,7 +269,7 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
>>  {
>>         const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;
>>         struct dwc3             *dwc = dep->dwc;
> 
>> -       u32                     timeout = 1000;
>> +       u32                     timeout = 5000;
> 
> I don't see anything about this change in commit message. Moreoever,
> it looks like it must be a separate logical change with its own
> description.
> 
>>         u32                     saved_config = 0;
>>         u32                     reg;
> 
> 

I will separate these changes into different patches. Thanks!