platform/x86: dell-wmi-base: Handle META key Lock/Unlock events

Some Alienware devices have a key that locks/unlocks the Meta key. This
key triggers a WMI event that should be ignored by the kernel, as it's
handled by internally the firmware.

There is no known way of changing this default behavior. The firmware
would lock/unlock the Meta key, regardless of how the event is handled.

Tested on an Alienware x15 R1.

Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20241031154441.6663-2-kuurtb@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Author: kuu-rt

drivers/platform/x86/dell/dell-wmi-base.c

@@ -80,6 +80,12 @@ static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = {
 static const struct key_entry dell_wmi_keymap_type_0000[] = {
 	{ KE_IGNORE, 0x003a, { KEY_CAPSLOCK } },
 
+	/* Meta key lock */
+	{ KE_IGNORE, 0xe000, { KEY_RIGHTMETA } },
+
+	/* Meta key unlock */
+	{ KE_IGNORE, 0xe001, { KEY_RIGHTMETA } },
+
 	/* Key code is followed by brightness level */
 	{ KE_KEY,    0xe005, { KEY_BRIGHTNESSDOWN } },
 	{ KE_KEY,    0xe006, { KEY_BRIGHTNESSUP } },