This is a note to let you know that I've just added the patch titled
Input: elantech - fix semi-mt protocol for v3 HW
to the 4.0-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-elantech-fix-semi-mt-protocol-for-v3-hw.patch
and it can be found in the queue-4.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 3c0213d17a09601e0c6c0ae0e27caf70d988290f Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <[email protected]>
Date: Thu, 23 Apr 2015 09:08:43 -0700
Subject: Input: elantech - fix semi-mt protocol for v3 HW
From: Benjamin Tissoires <[email protected]>
commit 3c0213d17a09601e0c6c0ae0e27caf70d988290f upstream.
When the v3 hardware sees more than one finger, it uses the semi-mt
protocol to report the touches. However, it currently works when
num_fingers is 0, 1 or 2, but when it is 3 and above, it sends only 1
finger as if num_fingers was 1.
This confuses userspace which knows how to deal with extra fingers
when all the slots are used, but not when some are missing.
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=90101
Signed-off-by: Benjamin Tissoires <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/input/mouse/elantech.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -315,7 +315,7 @@ static void elantech_report_semi_mt_data
unsigned int x2, unsigned int y2)
{
elantech_set_slot(dev, 0, num_fingers != 0, x1, y1);
- elantech_set_slot(dev, 1, num_fingers == 2, x2, y2);
+ elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2);
}
/*
Patches currently in stable-queue which might be from
[email protected] are
queue-4.0/input-elantech-fix-semi-mt-protocol-for-v3-hw.patch
queue-4.0/revert-hid-logitech-hidpp-support-combo-keyboard-touchpad-tk820.patch
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