Re: [PATCH v4 3/7] HID: asus: Force hid-input to bind to the Zenbook Duo hotkey interface

[Denis Benato <denis.benato@linux.dev>]

On 10/20/26 11:24, Paolo Pisati wrote:
> From: Joshua Leivenzon <hacker1024@users.sourceforge.net>
>
> The Zenbook Duo USB keyboard reports its hotkeys on a dedicated
> interface, separate from the keyboard and consumer control ones, that
> only contains ASUS vendor usage collections. hid-input does not
> consider those an input application and never binds to the interface,
> so the hotkeys are never mapped.
>
> Pass HID_CONNECT_HIDINPUT_FORCE for the interface of Zenbook Duo
> keyboards that carries the ASUS vendor collection, which skips that
> check, so the vendor usages go through asus_input_mapping() like on
> any other ASUS keyboard. The other interfaces either have a proper
> input application or nothing worth an input device.

Reviewed-by: Denis Benato <denis.benato@linux.dev>

> Signed-off-by: Joshua Leivenzon <hacker1024@users.sourceforge.net>
> [pisati: use HID_CONNECT_HIDINPUT_FORCE on the vendor interface instead
>  of injecting a fake keyboard collection into its report descriptor]
> Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
> Tested-by: Rebecca Mara Müller <rebecca.mara@posteo.de> # UX8407AA
> Reviewed-by: Denis Benato <denis.benato@linux.dev>
> ---
>  drivers/hid/hid-asus.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
> index 54f4d68eecc7..68211ebe1290 100644
> --- a/drivers/hid/hid-asus.c
> +++ b/drivers/hid/hid-asus.c
> @@ -1514,6 +1514,7 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
>  	struct asus_drvdata *drvdata;
>  	struct hid_report *rep;
>  	bool is_vendor = false;
> +	unsigned int connect_mask;
>  	int ret;
>  
>  	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
> @@ -1609,7 +1610,15 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
>  		return ret;
>  	}
>  
> -	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
> +	/*
> +	 * The Zenbook Duo hotkey interface only has vendor collections, which
> +	 * hid-input does not bind to on its own.
> +	 */
> +	connect_mask = HID_CONNECT_DEFAULT;
> +	if ((drvdata->quirks & QUIRK_ZENBOOK_DUO_KEYBOARD) && is_vendor)
> +		connect_mask |= HID_CONNECT_HIDINPUT_FORCE;
> +
> +	ret = hid_hw_start(hdev, connect_mask);
>  	if (ret) {
>  		asus_worker_stop(drvdata->worker);
>  		hid_err(hdev, "Asus hw start failed: %d\n", ret);