From 98ef9c89a35265668e8e96647c380249e88cb079 Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@fedoraproject.org>
Date: Dec 03 2015 15:59:49 +0000
Subject: Add patch to fix palm rejection on certain touchpads (rhbz 1287819)


---

diff --git a/HID-multitouch-enable-palm-rejection-if-device-imple.patch b/HID-multitouch-enable-palm-rejection-if-device-imple.patch
new file mode 100644
index 0000000..b9753fc
--- /dev/null
+++ b/HID-multitouch-enable-palm-rejection-if-device-imple.patch
@@ -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
+
diff --git a/kernel.spec b/kernel.spec
index 59101b7..2f62ddd 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -661,6 +661,9 @@ Patch568: Input-aiptek-fix-crash-on-detecting-device-without-e.patch
 #rhbz 1275490
 Patch569: 0001-iwlwifi-Add-new-PCI-IDs-for-the-8260-series.patch
 
+#rhbz 1287819
+Patch570: HID-multitouch-enable-palm-rejection-if-device-imple.patch
+
 # END OF PATCH DEFINITIONS
 
 %endif
@@ -2106,6 +2109,7 @@ fi
 # 
 %changelog
 * Thu Dec 03 2015 Josh Boyer <jwboyer@fedoraproject.org>
+- Add patch to fix palm rejection on certain touchpads (rhbz 1287819)
 - Add new PCI ids for wireless, including Lenovo Yoga (rhbz 1275490)
 
 * Tue Dec 01 2015 Josh Boyer <jwboyer@fedoraproject.org>