[PATCH 5.15 050/279] HID: multitouch: disable sticky fingers for UPERFECT Y

Greg Kroah-Hartman
2021-11-24T13:48:26Z

From: José Expósito <jose.exposito89@gmail.com>

[ Upstream commit 08b9a61a87bc339a73c584d8924c86ab36d204a7 ]

When a finger is on the screen, the UPERFECT Y portable touchscreen
monitor reports a contact in the first place. However, after this
initial report, contacts are not reported at the refresh rate of the
screen as required by the Windows 8 specs.

This behaviour triggers the release_timer, removing the fingers even
though they are still present.

To avoid it, add a new class, similar to MT_CLS_WIN_8 but without the
MT_QUIRK_STICKY_FINGERS quirk for this device.

Suggested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hid/hid-ids.h | 3 +++
drivers/hid/hid-multitouch.c | 13 +++++++++++++
2 files changed, 16 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 29564b370341e..3706c635b12ee 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1276,6 +1276,9 @@
#define USB_DEVICE_ID_WEIDA_8752 0xC300
#define USB_DEVICE_ID_WEIDA_8755 0xC301

+#define USB_VENDOR_ID_WINBOND 0x0416
+#define USB_DEVICE_ID_TSTP_MTOUCH 0xc168
+
#define USB_VENDOR_ID_WISEGROUP 0x0925
#define USB_DEVICE_ID_SMARTJOY_PLUS 0x0005
#define USB_DEVICE_ID_SUPER_JOY_BOX_3 0x8888
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 3ea7cb1cda84c..e1afddb7b33d8 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -193,6 +193,7 @@ static void mt_post_parse(struct mt_device *td, struct mt_application *app);
/* reserved 0x0014 */
#define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015
#define MT_CLS_WIN_8_DISABLE_WAKEUP 0x0016
+#define MT_CLS_WIN_8_NO_STICKY_FINGERS 0x0017

/* vendor specific classes */
#define MT_CLS_3M 0x0101
@@ -294,6 +295,13 @@ static const struct mt_class mt_classes[] = {
MT_QUIRK_WIN8_PTP_BUTTONS |
MT_QUIRK_DISABLE_WAKEUP,
.export_all_inputs = true },
+ { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
+ .quirks = MT_QUIRK_ALWAYS_VALID |
+ MT_QUIRK_IGNORE_DUPLICATES |
+ MT_QUIRK_HOVERING |
+ MT_QUIRK_CONTACT_CNT_ACCURATE |
+ MT_QUIRK_WIN8_PTP_BUTTONS,
+ .export_all_inputs = true },

/*
* vendor specific classes
@@ -2120,6 +2128,11 @@ static const struct hid_device_id mt_devices[] = {
MT_USB_DEVICE(USB_VENDOR_ID_VTL,
USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },

+ /* Winbond Electronics Corp. */
+ { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
+ HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
+ USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
+
/* Wistron panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
--
2.33.0