Revert "HID: multitouch: enable palm rejection if device implements confidence usage"

This reverts commit 25a84db15b3f ("HID: multitouch: enable palm rejection
if device implements confidence usage")

The commit enables palm rejection for Win8 Precision Touchpad devices but
the quirk MT_QUIRK_VALID_IS_CONFIDENCE it is using is not working very
properly. This quirk is originally designed for some WIn7 touchscreens. Use
of this for a Win8 Precision Touchpad will cause unexpected pointer jumping
problem.

Cc: [email protected] # v4.5+
Reviewed-by: Benjamin Tissoires <[email protected]>
Tested-by: Andy Lutomirski <[email protected]> # XPS 13 9350, BIOS 1.4.3
Signed-off-by: Allen Hung <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 95b7d61d9910f3c65fced473c4e2fab5ce0d4e9b..4ef700688657010381ceb4e5ee0d65b094afb787 100644 (file)
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -502,11 +502,6 @@ 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: