4.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Allen Hung <allen_hung@xxxxxxxx>
commit 62630ea768869beeb1e514b0bf5607a0c9b93d12 upstream.
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.
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Tested-by: Andy Lutomirski <luto@xxxxxxxxxx> # XPS 13 9350, BIOS 1.4.3
Signed-off-by: Allen Hung <allen_hung@xxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-multitouch.c | 5 -----
1 file changed, 5 deletions(-)
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -502,11 +502,6 @@ static int mt_touch_input_mapping(struct
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:
--
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