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Add patch to fix palm rejection on certain touchpads (rhbz 1287819)

This commit is contained in:
Josh Boyer 2015-12-03 10:59:46 -05:00
parent 1f24bf8ccd
commit 7361620af8
2 changed files with 47 additions and 0 deletions
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41
HID-multitouch-enable-palm-rejection-if-device-imple.patch Normal file
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@ -0,0 +1,41 @@
From 37e81f1a82ba4f214c05c4cc3807378753c7a867 Mon Sep 17 00:00:00 2001
From: Allen Hung <allen_hung@dell.com>
Date: Fri, 20 Nov 2015 18:21:06 +0800
Subject: [PATCH] HID: multitouch: enable palm rejection if device implements
confidence usage
The usage Confidence is mandary to Windows Precision Touchpad devices. The
appearance of this usage is checked in hidinput_connect but the quirk
MT_QUIRK_VALID_IS_CONFIDENCE is not applied to device accordingly.
Apply this quirk and also remove quirk MT_QUIRK_ALWAYS_VALID to enable palm
rejection for the WIN 8 touchpad devices which have implemented usage
Confidence in its input reports.
Tested on Dell XPS 13 laptop.
Signed-off-by: Allen Hung <allen_hung@dell.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
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 7c811252c1ce..0c94348a168d 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -448,6 +448,11 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
mt_store_field(usage, td, hi);
return 1;
case HID_DG_CONFIDENCE:
+ if (cls->name == MT_CLS_WIN_8 &&
+ field->application == HID_DG_TOUCHPAD) {
+ cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
+ cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
+ }
mt_store_field(usage, td, hi);
return 1;
case HID_DG_TIPSWITCH:
--
2.5.0

6
kernel.spec
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@ -597,6 +597,9 @@ Patch567: usbvision-fix-crash-on-detecting-device-with-invalid.patch
#CVE-2015-7515 rhbz 1285326 1285331
Patch568: Input-aiptek-fix-crash-on-detecting-device-without-e.patch
#rhbz 1287819
Patch570: HID-multitouch-enable-palm-rejection-if-device-imple.patch
# END OF PATCH DEFINITIONS
%endif
@ -2040,6 +2043,9 @@ fi
#
#
%changelog
* Thu Dec 03 2015 Josh Boyer <jwboyer@fedoraproject.org>
- Add patch to fix palm rejection on certain touchpads (rhbz 1287819)
* Wed Dec 02 2015 Laura Abbott <labbott@redhat.com> - 4.4.0-0.rc3.git2.1
- Linux v4.4-rc3-8-g6a24e72