On 06/23/2016 01:31 AM, Allen Hung wrote:
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.
Signed-off-by: Allen Hung <allen_hung@xxxxxxxx>
---
drivers/hid/hid-multitouch.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 95b7d61..4ef7006 100644
--- 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:
This and patch 2 are:
Tested-by: Andy Lutomirski <luto@xxxxxxxxxx> # XPS 13 9350, BIOS 1.4.3
(And I'm curious why 1.4.3 seems to have been pulled. Might it have
been this issue? For better or for worse, I upgraded in the narrow
window in which it was available on Dell's website.)
--Andy
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