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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Sean O'Brien <seobrien@chromium.org>,
	Jiri Kosina <jkosina@suse.com>,
	Sasha Levin <sashal@kernel.org>,
	jikos@kernel.org,
	bentiss@kernel.org,
	linux-input@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 10/13] HID: Add quirk for Logitech Casa touchpad
Date: Mon, 27 May 2024 10:18:04 -0400
Message-ID: <20240527141819.3854376-10-sashal@kernel.org>
In-Reply-To: <20240527141819.3854376-1-sashal@kernel.org>
References: <20240527141819.3854376-1-sashal@kernel.org>
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From: Sean O'Brien <seobrien@chromium.org>

[ Upstream commit dd2c345a94cfa3873cc20db87387ee509c345c1b ]

This device sometimes doesn't send touch release signals when moving
from >=4 fingers to <4 fingers. Using MT_QUIRK_NOT_SEEN_MEANS_UP instead
of MT_QUIRK_ALWAYS_VALID makes sure that no touches become stuck.

MT_QUIRK_FORCE_MULTI_INPUT is not necessary for this device, but does no
harm.

Signed-off-by: Sean O'Brien <seobrien@chromium.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hid/hid-ids.h        | 1 +
 drivers/hid/hid-multitouch.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 7b1fdfde5b405..0504bdd465013 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -777,6 +777,7 @@
 #define USB_DEVICE_ID_LOGITECH_AUDIOHUB 0x0a0e
 #define USB_DEVICE_ID_LOGITECH_T651	0xb00c
 #define USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD	0xb309
+#define USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD	0xbb00
 #define USB_DEVICE_ID_LOGITECH_C007	0xc007
 #define USB_DEVICE_ID_LOGITECH_C077	0xc077
 #define USB_DEVICE_ID_LOGITECH_RECEIVER	0xc101
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 2e14e3071aa69..fea27d66d91c0 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -2082,6 +2082,12 @@ static const struct hid_device_id mt_devices[] = {
 			   USB_VENDOR_ID_LENOVO,
 			   USB_DEVICE_ID_LENOVO_X12_TAB) },
 
+	/* Logitech devices */
+	{ .driver_data = MT_CLS_NSMU,
+		HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_LOGITECH,
+			USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD) },
+
 	/* MosArt panels */
 	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 		MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
-- 
2.43.0