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HID: lenovo: Sync Fn-lock state on button press for Compact and TrackPoint II keyboards

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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: Florian Klink <flokli@flokli.de>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
ValdikSS 2022-02-13 22:49:23 +01:00 committed by Jiri Kosina
parent 24401f291d
commit a0a5c2a696
1 changed files with 9 additions and 0 deletions
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9
drivers/hid/hid-lenovo.c
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@ -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;
}