linux-kernel - Re: [PATCH v10 02/11] HID: asus: initialize additional endpoints only for legacy devices

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Message-ID: <400c681d-a841-4bfd-a7a3-b8d4c6683124@gmail.com>
Date: Wed, 26 Nov 2025 21:27:24 +0100
From: Denis Benato <benato.denis96@...il.com>
To: Antheas Kapenekakis <lkml@...heas.dev>,
 platform-driver-x86@...r.kernel.org, linux-input@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Jiri Kosina <jikos@...nel.org>,
 Benjamin Tissoires <bentiss@...nel.org>,
 Corentin Chary <corentin.chary@...il.com>, "Luke D . Jones"
 <luke@...nes.dev>, Hans de Goede <hansg@...nel.org>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: Re: [PATCH v10 02/11] HID: asus: initialize additional endpoints only
 for legacy devices


On 11/22/25 12:00, Antheas Kapenekakis wrote:
> Currently, ID1/ID2 initializations are performed for all NKEY devices.
> However, ID1 initializations are only required for RGB control and are
> only supported for RGB capable devices. ID2 initializations are only
> required for initializing the Anime display endpoint which is only
> supported on devices with an Anime display. Both of these
> initializations are out of scope for this driver (this is a brightness
> control and keyboard shortcut driver) and they should not be performed
> for devices that do not support them in any case.
>
> At the same time, there are older NKEY devices that have only been
> tested with these initializations in the kernel and it is not possible
> to recheck them. There is a possibility that especially with the ID1
> initialization, certain laptop models might have their shortcuts stop
> working (currently unproven).
>
> For an abundance of caution, only initialize ID1/ID2 for those older
> NKEY devices by introducing a quirk for them and replacing the NKEY
> quirk in the block that performs the inits with that.
Reviewed-by: Denis Benato <benato.denis96@...il.com>
> Signed-off-by: Antheas Kapenekakis <lkml@...heas.dev>
> ---
>  drivers/hid/hid-asus.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
> index a82286a427b8..9004814fb0d3 100644
> --- a/drivers/hid/hid-asus.c
> +++ b/drivers/hid/hid-asus.c
> @@ -90,6 +90,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
>  #define QUIRK_ROG_NKEY_KEYBOARD		BIT(11)
>  #define QUIRK_ROG_CLAYMORE_II_KEYBOARD BIT(12)
>  #define QUIRK_ROG_ALLY_XPAD		BIT(13)
> +#define QUIRK_ROG_NKEY_LEGACY		BIT(14)
>  
>  #define I2C_KEYBOARD_QUIRKS			(QUIRK_FIX_NOTEBOOK_REPORT | \
>  						 QUIRK_NO_INIT_REPORTS | \
> @@ -652,7 +653,7 @@ static int asus_kbd_register_leds(struct hid_device *hdev)
>  	if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
>  		return -ENODEV;
>  
> -	if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) {
> +	if (drvdata->quirks & QUIRK_ROG_NKEY_LEGACY) {
>  		ret = asus_kbd_init(hdev, FEATURE_KBD_LED_REPORT_ID1);
>  		if (ret < 0)
>  			return ret;
> @@ -1376,10 +1377,10 @@ static const struct hid_device_id asus_devices[] = {
>  	  QUIRK_USE_KBD_BACKLIGHT },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
>  	    USB_DEVICE_ID_ASUSTEK_ROG_NKEY_KEYBOARD),
> -	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD },
> +	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD | QUIRK_ROG_NKEY_LEGACY },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
>  	    USB_DEVICE_ID_ASUSTEK_ROG_NKEY_KEYBOARD2),
> -	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD },
> +	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD | QUIRK_ROG_NKEY_LEGACY },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
>  	    USB_DEVICE_ID_ASUSTEK_ROG_Z13_LIGHTBAR),
>  	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD },