[PATCH v3 2/7] HID: asus: Add missing Zenbook Duo hotkeys

[Paolo Pisati <p.pisati@gmail.com>]

From: Joshua Leivenzon <hacker1024@users.sourceforge.net>

Map the Zenbook Duo "screen swap" hotkey (vendor usage 0x9c) to
KEY_F19, like the other ASUS vendor keys that have no dedicated
keycode, so that userspace can bind it.

The mappings from the ROG Ally onwards belong to devices with built-in
keyboards and can share keycodes freely. The Zenbook Duo keyboard
cannot: it is a standard USB/Bluetooth device and can be connected to
another ASUS machine handled by this driver. Document that above the
ROG Ally mappings.

Signed-off-by: Joshua Leivenzon <hacker1024@users.sourceforge.net>
[pisati: drop the MyASUS key (0x86) mapping, 2061075360182 ("HID:
 asus: support the Zenbook A16 (UX3607OA) keyboard") maps it to
 KEY_PROG1 like asus-nb-wmi does]
Assisted-by: LLM
Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
Tested-by: Rebecca Mara Müller <rebecca.mara@posteo.de> # UX8407AA
---
 drivers/hid/hid-asus.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index 34739198d90e..242e273e4cb3 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -1264,6 +1264,19 @@ static int asus_input_mapping(struct hid_device *hdev,
 		case 0xb3: asus_map_key_clear(KEY_PROG3);	break; /* Fn+Left next aura */
 		case 0x6a: asus_map_key_clear(KEY_F13);		break; /* Screenpad toggle */
 		case 0x4b: asus_map_key_clear(KEY_F14);		break; /* Arrows/Pg-Up/Dn toggle */
+		case 0x9c: asus_map_key_clear(KEY_F19);		break; /* Screen swap */
+
+		/*
+		 * Mutually exclusive section: Special keys from different devices
+		 * can bind to the same keycodes without concern, as they will never
+		 * conflict.
+		 *
+		 * Note that devices with removable keyboards that connect over a
+		 * standard interface (e.g. Zenbook Duo UX8406 with USB/Bluetooth) do
+		 * not belong in this section, as such keyboards can be connected to
+		 * another ASUS device that also uses this driver for its own keyboard.
+		 */
+		/* ROG Ally */
 		case 0xa5: asus_map_key_clear(KEY_F15);		break; /* ROG Ally left back */
 		case 0xa6: asus_map_key_clear(KEY_F16);		break; /* ROG Ally QAM button */
 		case 0xa7: asus_map_key_clear(KEY_F17);		break; /* ROG Ally ROG long-press */
-- 
2.43.0