From 89f504abc8770d7d1459c16ade4b416e57471a18 Mon Sep 17 00:00:00 2001
From: Youwan Wang <youwan@nfschina.com>
Date: Mon, 16 Dec 2024 10:18:01 +0800
Subject: [PATCH] HID: multitouch: Add quirk for Hantick 5288 touchpad

BugLink: https://bugs.launchpad.net/bugs/2114239

[ Upstream commit b5e65ae557da9fd17b08482ee44ee108ba636182 ]

This device sometimes doesn't send touch release signals when moving
from >=2 fingers to <2 fingers. Using MT_QUIRK_NOT_SEEN_MEANS_UP instead
of MT_QUIRK_ALWAYS_VALID makes sure that no touches become stuck.

Signed-off-by: Enze Xie <enze@nfschina.com>
Signed-off-by: Youwan Wang <youwan@nfschina.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
---
 drivers/hid/hid-multitouch.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index e43b1fabd36f..facf1cb25805 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -2295,6 +2295,11 @@ static const struct hid_device_id mt_devices[] = {
 		HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
 			USB_DEVICE_ID_GOOGLE_WHISKERS) },
 
+	/* Hantick */
+	{ .driver_data = MT_CLS_NSMU,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			   I2C_VENDOR_ID_HANTICK, I2C_PRODUCT_ID_HANTICK_5288) },
+
 	/* Generic MT device */
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },