This is a note to let you know that I've just added the patch titled
Input: zforce_ts - fix dual touch recognition
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
input-zforce_ts-fix-dual-touch-recognition.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6984ab1ab35f422292b7781c65284038bcc0f6a6 Mon Sep 17 00:00:00 2001
From: Knut Wohlrab <Knut.Wohlrab@xxxxxxxxxxxx>
Date: Mon, 25 Apr 2016 14:08:25 -0700
Subject: Input: zforce_ts - fix dual touch recognition
From: Knut Wohlrab <Knut.Wohlrab@xxxxxxxxxxxx>
commit 6984ab1ab35f422292b7781c65284038bcc0f6a6 upstream.
A wrong decoding of the touch coordinate message causes a wrong touch
ID. Touch ID for dual touch must be 0 or 1.
According to the actual Neonode nine byte touch coordinate coding,
the state is transported in the lower nibble and the touch ID in
the higher nibble of payload byte five.
Signed-off-by: Knut Wohlrab <Knut.Wohlrab@xxxxxxxxxxxx>
Signed-off-by: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/input/touchscreen/zforce_ts.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/input/touchscreen/zforce_ts.c
+++ b/drivers/input/touchscreen/zforce_ts.c
@@ -370,8 +370,8 @@ static int zforce_touch_event(struct zfo
point.coord_x = point.coord_y = 0;
}
- point.state = payload[9 * i + 5] & 0x03;
- point.id = (payload[9 * i + 5] & 0xfc) >> 2;
+ point.state = payload[9 * i + 5] & 0x0f;
+ point.id = (payload[9 * i + 5] & 0xf0) >> 4;
/* determine touch major, minor and orientation */
point.area_major = max(payload[9 * i + 6],
Patches currently in stable-queue which might be from Knut.Wohlrab@xxxxxxxxxxxx are
queue-4.4/input-zforce_ts-fix-dual-touch-recognition.patch
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