42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
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From 37e81f1a82ba4f214c05c4cc3807378753c7a867 Mon Sep 17 00:00:00 2001
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From: Allen Hung <allen_hung@dell.com>
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Date: Fri, 20 Nov 2015 18:21:06 +0800
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Subject: [PATCH] HID: multitouch: enable palm rejection if device implements
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confidence usage
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The usage Confidence is mandary to Windows Precision Touchpad devices. The
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appearance of this usage is checked in hidinput_connect but the quirk
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MT_QUIRK_VALID_IS_CONFIDENCE is not applied to device accordingly.
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Apply this quirk and also remove quirk MT_QUIRK_ALWAYS_VALID to enable palm
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rejection for the WIN 8 touchpad devices which have implemented usage
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Confidence in its input reports.
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Tested on Dell XPS 13 laptop.
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Signed-off-by: Allen Hung <allen_hung@dell.com>
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Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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---
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drivers/hid/hid-multitouch.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
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index 7c811252c1ce..0c94348a168d 100644
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--- a/drivers/hid/hid-multitouch.c
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+++ b/drivers/hid/hid-multitouch.c
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@@ -448,6 +448,11 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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mt_store_field(usage, td, hi);
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return 1;
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case HID_DG_CONFIDENCE:
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+ if (cls->name == MT_CLS_WIN_8 &&
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+ field->application == HID_DG_TOUCHPAD) {
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+ cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
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+ cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
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+ }
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mt_store_field(usage, td, hi);
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return 1;
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case HID_DG_TIPSWITCH:
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--
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2.5.0
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