On 10/18/25 12:17, Antheas Kapenekakis wrote:
> Currently, RGB initialization forks depending on whether a device is
> NKEY. Then, NKEY devices are initialized using 0x5a, 0x5d, 0x5e
> endpoints, and non-NKEY devices with 0x5a and then a
> backlight check, which is omitted for NKEY devices.
>
> Remove the fork, using a common initialization sequence for both,
> where they are both only initialized with 0x5a, then checked for
> backlight support. This patch should not affect existing functionality.
>
> 0x5d and 0x5e endpoint initializations are performed by Windows
> userspace programs associated with different usages that reside under
> the vendor HID. Specifically, 0x5d is used by Armoury Crate, which
> controls RGB and 0x5e by an animation program for certain Asus laptops.
> Neither is used currently in the driver.
What benefits do we get from removing the unused initialization?
If this has never caused any troubles I don't see the reason for removing
them. Moreover the lighting protocol is known and I might as well add
support for it in the near future,
> Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev>
> ---
> drivers/hid/hid-asus.c | 56 ++++++++++++++----------------------------
> 1 file changed, 19 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
> index a444d41e53b6..7ea1037c3979 100644
> --- a/drivers/hid/hid-asus.c
> +++ b/drivers/hid/hid-asus.c
> @@ -638,50 +638,32 @@ static int asus_kbd_register_leds(struct hid_device *hdev)
> unsigned char kbd_func;
> int ret;
>
> - if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) {
> - /* Initialize keyboard */
> - ret = asus_kbd_init(hdev, FEATURE_KBD_REPORT_ID);
> - if (ret < 0)
> - return ret;
> -
> - /* The LED endpoint is initialised in two HID */
> - ret = asus_kbd_init(hdev, FEATURE_KBD_LED_REPORT_ID1);
> - if (ret < 0)
> - return ret;
> -
> - ret = asus_kbd_init(hdev, FEATURE_KBD_LED_REPORT_ID2);
> - if (ret < 0)
> - return ret;
> -
> - if (dmi_match(DMI_PRODUCT_FAMILY, "ProArt P16")) {
> - ret = asus_kbd_disable_oobe(hdev);
> - if (ret < 0)
> - return ret;
> - }
> -
> - if (drvdata->quirks & QUIRK_ROG_ALLY_XPAD) {
> - intf = to_usb_interface(hdev->dev.parent);
> - udev = interface_to_usbdev(intf);
> - validate_mcu_fw_version(hdev,
> - le16_to_cpu(udev->descriptor.idProduct));
> - }
> + ret = asus_kbd_init(hdev, FEATURE_KBD_REPORT_ID);
> + if (ret < 0)
> + return ret;
>
> - } else {
> - /* Initialize keyboard */
> - ret = asus_kbd_init(hdev, FEATURE_KBD_REPORT_ID);
> - if (ret < 0)
> - return ret;
> + /* Get keyboard functions */
> + ret = asus_kbd_get_functions(hdev, &kbd_func, FEATURE_KBD_REPORT_ID);
> + if (ret < 0)
> + return ret;
>
> - /* Get keyboard functions */
> - ret = asus_kbd_get_functions(hdev, &kbd_func, FEATURE_KBD_REPORT_ID);
> + if (dmi_match(DMI_PRODUCT_FAMILY, "ProArt P16")) {
> + ret = asus_kbd_disable_oobe(hdev);
> if (ret < 0)
> return ret;
> + }
>
> - /* Check for backlight support */
> - if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
> - return -ENODEV;
> + if (drvdata->quirks & QUIRK_ROG_ALLY_XPAD) {
> + intf = to_usb_interface(hdev->dev.parent);
> + udev = interface_to_usbdev(intf);
> + validate_mcu_fw_version(
> + hdev, le16_to_cpu(udev->descriptor.idProduct));
> }
>
> + /* Check for backlight support */
> + if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
> + return -ENODEV;
> +
> drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
> sizeof(struct asus_kbd_leds),
> GFP_KERNEL);