linux-kernel - Re: [PATCH v3 2/3] usb: dwc3: imx8mp: add 2 software managed quirk properties for host mode

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Message-ID: <20240904214553.45ynrcqzm6p7n72w@synopsys.com>
Date: Wed, 4 Sep 2024 21:46:02 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Frank Li <Frank.Li@....com>
CC: Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>,
        "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
        "jun.li@....com" <jun.li@....com>
Subject: Re: [PATCH v3 2/3] usb: dwc3: imx8mp: add 2 software managed quirk
 properties for host mode

On Wed, Sep 04, 2024, Frank Li wrote:
> Add 2 software manage quirk properties (xhci-missing-cas-quirk and
> xhci-skip-phy-init-quirk) for xhci host.
> 
> dwc3 driver have PHY management to cover both device and host mode, so add
> xhci-skip-phy-init-quirk to skip PHY management from HCD core.
> 
> Cold Attach Status (CAS) bit can't be set at i.MX8MP after resume from
> suspend state. So set xhci-missing-cas-quirk.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> Change from v2 to v3
> - rework commit message to descript why need set quirk.
> 
> Change from v1 to v2
> - use {0}
> ---
>  drivers/usb/dwc3/dwc3-imx8mp.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c
> index 392fa1232788c..bd6953246f42e 100644
> --- a/drivers/usb/dwc3/dwc3-imx8mp.c
> +++ b/drivers/usb/dwc3/dwc3-imx8mp.c
> @@ -144,6 +144,17 @@ static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx)
>  	return IRQ_HANDLED;
>  }
>  
> +static int dwc3_imx8mp_set_software_node(struct device *dev)
> +{
> +	struct property_entry props[3] = { 0 };
> +	int prop_idx = 0;
> +
> +	props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-missing-cas-quirk");
> +	props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-skip-phy-init-quirk");
> +
> +	return device_create_managed_software_node(dev, props, NULL);
> +}
> +
>  static int dwc3_imx8mp_probe(struct platform_device *pdev)
>  {
>  	struct device		*dev = &pdev->dev;
> @@ -226,6 +237,13 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
>  		goto disable_rpm;
>  	}
>  
> +	err = dwc3_imx8mp_set_software_node(dev);
> +	if (err) {
> +		err = -ENODEV;
> +		dev_err(dev, "failed to create software node\n");
> +		goto disable_rpm;
> +	}
> +
>  	err = of_platform_populate(node, NULL, NULL, dev);
>  	if (err) {
>  		dev_err(&pdev->dev, "failed to create dwc3 core\n");
> 
> -- 
> 2.34.1
> 

This doesn't look like it's based on top of Greg's usb-testing branch.
But I think it should still apply, please double check.

Regardless,

Acked-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>

Thanks,
Thinh