linux-kernel - [PATCH v8 05/10] HID: asus: initialize LED endpoint early for old NKEY keyboards

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Message-ID: <20251101104712.8011-6-lkml@antheas.dev>
Date: Sat,  1 Nov 2025 11:47:07 +0100
From: Antheas Kapenekakis <lkml@...heas.dev>
To: 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 <hdegoede@...hat.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Denis Benato <benato.denis96@...il.com>,
	Antheas Kapenekakis <lkml@...heas.dev>
Subject: [PATCH v8 05/10] HID: asus: initialize LED endpoint early for old
 NKEY keyboards

These keyboards have always had initialization in the kernel for 0x5d.
At this point, it is hard to verify again and we risk regressions by
removing this. Therefore, initialize with 0x5d as well.

Signed-off-by: Antheas Kapenekakis <lkml@...heas.dev>
---
 drivers/hid/hid-asus.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index 726f5d8e22d1..221c7195e885 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -91,6 +91,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
 #define QUIRK_ROG_CLAYMORE_II_KEYBOARD BIT(12)
 #define QUIRK_ROG_ALLY_XPAD		BIT(13)
 #define QUIRK_SKIP_REPORT_FIXUP		BIT(14)
+#define QUIRK_ROG_NKEY_LEGACY		BIT(15)
 
 #define I2C_KEYBOARD_QUIRKS			(QUIRK_FIX_NOTEBOOK_REPORT | \
 						 QUIRK_NO_INIT_REPORTS | \
@@ -669,6 +670,16 @@ static int asus_kbd_register_leds(struct hid_device *hdev)
 	if (ret < 0)
 		return ret;
 
+	if (drvdata->quirks & QUIRK_ROG_NKEY_LEGACY) {
+		/*
+		 * These keyboards might need 0x5d for shortcuts to work.
+		 * As it has been more than 5 years, it is hard to verify.
+		 */
+		ret = asus_kbd_init(hdev, FEATURE_KBD_LED_REPORT_ID1);
+		if (ret < 0)
+			return ret;
+	}
+
 	/* Get keyboard functions */
 	ret = asus_kbd_get_functions(hdev, &kbd_func, FEATURE_KBD_REPORT_ID);
 	if (ret < 0)
@@ -1409,10 +1420,10 @@ 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 },
-- 
2.51.2