From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

The ASUS Zenbook A16 (UX3607OA), a Qualcomm Snapdragon X2 Elite Extreme
(Glymur)-based laptop, carries its main keyboard on an I2C-HID device
with the ID 0B05:4B42. Its Fn/media hotkeys are emitted as vendor-page
(HID_UP_ASUSVENDOR) usages on report 0x5A.

Match the device in hid-asus with the standard I2C keyboard quirks and
add the three usage mappings observed on the hardware:

  0x85 -> KEY_CAMERA  (Fn+F11, camera toggle)
  0x86 -> KEY_PROG1   (Fn+F12, MyASUS key)
  0x5f -> KEY_PROG2   (extra programmable key)

The camera-toggle key reports its usage (0x85) together with a companion
state byte in the same array report ("5a 85 01" / "5a 85 10"). The 0x10
companion aliases the brightness-down vendor usage and spuriously dims
the panel, so add QUIRK_FILTER_CAMERA_COMPANION to zero the companion
slots for this device before input mapping. The quirk is device-gated so
no other ASUS model is affected.

Assisted-by: Claude Code:claude-opus-4-8
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
---
 drivers/hid/hid-asus.c | 18 ++++++++++++++++++
 drivers/hid/hid-ids.h  |  1 +
 2 files changed, 19 insertions(+)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index d34d74df3dc0..789546238dc7 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -99,6 +99,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
 #define QUIRK_ROG_CLAYMORE_II_KEYBOARD	BIT(12)
 #define QUIRK_ROG_ALLY_XPAD		BIT(13)
 #define QUIRK_HID_FN_LOCK		BIT(14)
+#define QUIRK_FILTER_CAMERA_COMPANION	BIT(15)
 
 #define I2C_KEYBOARD_QUIRKS			(QUIRK_FIX_NOTEBOOK_REPORT | \
 						 QUIRK_NO_INIT_REPORTS | \
@@ -460,6 +461,17 @@ static int asus_raw_event(struct hid_device *hdev,
 			return -1;
 	}
 
+	/*
+	 * The camera-toggle key reports its vendor usage (0x85) together with a
+	 * companion state byte in the same array report, e.g. "5a 85 01" and
+	 * "5a 85 10" for the two toggle positions. The 0x10 companion aliases the
+	 * brightness-down vendor usage and would spuriously dim the panel, so drop
+	 * the companion slots and leave only the camera usage for input mapping.
+	 */
+	if (drvdata->quirks & QUIRK_FILTER_CAMERA_COMPANION &&
+	    report->id == FEATURE_KBD_REPORT_ID && size >= 3 && data[1] == 0x85)
+		memset(&data[2], 0, size - 2);
+
 	return 0;
 }
 
@@ -1051,6 +1063,8 @@ static int asus_input_mapping(struct hid_device *hdev,
 		case 0x6c: asus_map_key_clear(KEY_SLEEP);		break;
 		case 0x7c: asus_map_key_clear(KEY_MICMUTE);		break;
 		case 0x82: asus_map_key_clear(KEY_CAMERA);		break;
+		case 0x85: asus_map_key_clear(KEY_CAMERA);		break;
+		case 0x86: asus_map_key_clear(KEY_PROG1);	break; /* MyASUS key */
 		case 0x88: asus_map_key_clear(KEY_RFKILL);			break;
 		case 0xb5: asus_map_key_clear(KEY_CALC);			break;
 		case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP);		break;
@@ -1060,6 +1074,7 @@ static int asus_input_mapping(struct hid_device *hdev,
 		case 0x7e: asus_map_key_clear(KEY_EMOJI_PICKER);	break;
 
 		case 0x8b: asus_map_key_clear(KEY_PROG1);	break; /* ProArt Creator Hub key */
+		case 0x5f: asus_map_key_clear(KEY_PROG2);	break; /* S-shaped programmable key */
 		case 0x6b: asus_map_key_clear(KEY_F21);		break; /* ASUS touchpad toggle */
 		case 0x38: asus_map_key_clear(KEY_PROG1);	break; /* ROG key */
 		case 0xba: asus_map_key_clear(KEY_PROG2);	break; /* Fn+C ASUS Splendid */
@@ -1483,6 +1498,9 @@ static const __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 static const struct hid_device_id asus_devices[] = {
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
 		USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
+	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
+		USB_DEVICE_ID_ASUSTEK_I2C_ZENBOOK_KEYBOARD),
+	  I2C_KEYBOARD_QUIRKS | QUIRK_FILTER_CAMERA_COMPANION },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
 		USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index b70f719b3b07..f381fcd9a76d 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -220,6 +220,7 @@
 #define USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD	0x183d
 #define USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD	0x184a
 #define USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD	0x8585
+#define USB_DEVICE_ID_ASUSTEK_I2C_ZENBOOK_KEYBOARD	0x4b42
 #define USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD	0x0101
 #define USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1 0x1854
 #define USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2 0x1837

---
base-commit: 9eebf259d5352b87080d67758f483583d9e763d7
change-id: 20260724-topic-asus_keyboard-83122b29dc2a

Best regards,
--  
Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>