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Commit 25a84db1 authored by Allen Hung's avatar Allen Hung Committed by Jiri Kosina
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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: default avatarAllen Hung <allen_hung@dell.com>
Reviewed-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 319645ca

drivers/hid/hid-multitouch.c

+5 −0
Original line number Diff line number Diff line
@@ -486,6 +486,11 @@ 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: