From mboxrd@z Thu Jan 1 00:00:00 1970 From: Allen Hung Subject: [PATCH 1/1] HID: multitouch: enable palm rejection if device implements confidence usage Date: Fri, 20 Nov 2015 18:21:06 +0800 Message-ID: <1448014866-25348-1-git-send-email-allen_hung@dell.com> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Jiri Kosina Cc: LKML , linux-input@vger.kernel.org, Benjamin Tissoires , Allen Hung List-Id: linux-input@vger.kernel.org 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: Allen Hung --- drivers/hid/hid-multitouch.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 426b2f1..13aeff9 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -448,6 +448,11 @@ 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: -- 1.9.1