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[v2,2/3] HID: lenovo: Sync Fn-lock state on button press for Compact and TrackPoint II keyboards

Message ID 20211216224611.440397-3-iam@valdikss.org.ru
State Accepted
Commit a0a5c2a696990520eba366fae67573306641b93b
Headers show
Series HID: lenovo: ThinkPad TrackPoint Keyboard II support | expand

Commit Message

ValdikSS Dec. 16, 2021, 10:46 p.m. UTC
When Fn-Esc is pressed on the keyboard, it emits the scancode which could
be used to sync the fn_lock sysfs state.

Previously fn_lock only allowed to set new Fn-lock state and did not
keep the value in sync upon Fn-Esc press, which is now fixed.

Signed-off-by: ValdikSS <iam@valdikss.org.ru>
---
 drivers/hid/hid-lenovo.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index a612ae7df..e9466ae8a 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -690,6 +690,15 @@  static int lenovo_event_cptkbd(struct hid_device *hdev,
 		return 1;
 	}
 
+	if (usage->type == EV_KEY && usage->code == KEY_FN_ESC && value == 1) {
+		/*
+		 * The user has toggled the Fn-lock state. Toggle our own
+		 * cached value of it and sync our value to the keyboard to
+		 * ensure things are in sync (the syncing should be a no-op).
+		 */
+		cptkbd_data->fn_lock = !cptkbd_data->fn_lock;
+	}
+
 	return 0;
 }