[PATCH 09/11] HID: asus: add support for the asus-wmi brightness handler

[Antheas Kapenekakis <lkml@antheas.dev>]

If the asus-wmi brightness handler is available, send the
keyboard brightness events to it instead of passing them
to userspace. If it is not, fall back to sending them to it.

Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev>
---
 drivers/hid/hid-asus.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index b39d61b31ff23..546603f5193c7 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -319,6 +319,17 @@ static int asus_event(struct hid_device *hdev, struct hid_field *field,
 			 usage->hid & HID_USAGE);
 	}
 
+	if (usage->type == EV_KEY && value) {
+		switch (usage->code) {
+		case KEY_KBDILLUMUP:
+			return !asus_brt_event(ASUS_BRT_UP);
+		case KEY_KBDILLUMDOWN:
+			return !asus_brt_event(ASUS_BRT_DOWN);
+		case KEY_KBDILLUMTOGGLE:
+			return !asus_brt_event(ASUS_BRT_TOGGLE);
+		}
+	}
+
 	return 0;
 }
 
-- 
2.48.1