linux-kernel - Re: [PATCH v2 1/3] usb: roles: intel

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Message-ID: <0e4dd22d-8553-1d51-22a2-d6252e5c5dc5@redhat.com>
Date:   Wed, 23 May 2018 20:03:43 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v2 1/3] usb: roles: intel_xhci: Always allow user control

Hi,

On 23-05-18 16:37, Heikki Krogerus wrote:
> Trying to determine the USB port type with this mux is very
> difficult. To simplify the situation, always allowing user
> control, even if the port is USB Type-C port.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
>   .../usb/roles/intel-xhci-usb-role-switch.c    | 21 +------------------
>   1 file changed, 1 insertion(+), 20 deletions(-)
> 
> diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c
> index 30b07ea3a3c6..3f14153d753f 100644
> --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c
> +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c
> @@ -39,20 +39,6 @@ struct intel_xhci_usb_data {
>   	void __iomem *base;
>   };
>   
> -struct intel_xhci_acpi_match {
> -	const char *hid;
> -	int hrv;
> -};
> -
> -/*
> - * ACPI IDs for PMICs which do not support separate data and power role
> - * detection (USB ACA detection for micro USB OTG), we allow userspace to
> - * change the role manually on these.
> - */
> -static const struct intel_xhci_acpi_match allow_userspace_ctrl_ids[] = {
> -	{ "INT33F4",  3 }, /* X-Powers AXP288 PMIC */
> -};
> -
>   static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role)
>   {
>   	struct intel_xhci_usb_data *data = dev_get_drvdata(dev);
> @@ -139,6 +125,7 @@ static enum usb_role intel_xhci_usb_get_role(struct device *dev)
>   static struct usb_role_switch_desc sw_desc = {
>   	.set = intel_xhci_usb_set_role,
>   	.get = intel_xhci_usb_get_role,
> +	.allow_userspace_control = true,
>   };
>   
>   static int intel_xhci_usb_probe(struct platform_device *pdev)


I hate to be pedantic here, but the sw_desc can and should be made
const now, with that fixed the entire series is:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> @@ -146,7 +133,6 @@ static int intel_xhci_usb_probe(struct platform_device *pdev)
>   	struct device *dev = &pdev->dev;
>   	struct intel_xhci_usb_data *data;
>   	struct resource *res;
> -	int i;
>   
>   	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
>   	if (!data)
> @@ -159,11 +145,6 @@ static int intel_xhci_usb_probe(struct platform_device *pdev)
>   	if (!data->base)
>   		return -ENOMEM;
>   
> -	for (i = 0; i < ARRAY_SIZE(allow_userspace_ctrl_ids); i++)
> -		if (acpi_dev_present(allow_userspace_ctrl_ids[i].hid, "1",
> -				     allow_userspace_ctrl_ids[i].hrv))
> -			sw_desc.allow_userspace_control = true;
> -
>   	platform_set_drvdata(pdev, data);
>   
>   	data->role_sw = usb_role_switch_register(dev, &sw_desc);
>