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Subject: Re: [PATCH 1/1] HID: multitouch: enable palm rejection if device
 implements confidence usage
To: Benjamin Tissoires <benjamin.tissoires@gmail.com>,
        Jiri Kosina <jikos@kernel.org>
References: <1448014866-25348-1-git-send-email-allen_hung@dell.com>
 <alpine.LNX.2.00.1511261521350.20111@pobox.suse.cz>
 <CAN+gG=Ga92-UPbbcjiL0p2b4gO0iQE_-U6wXiq_x3=39z+edSg@mail.gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        linux-input <linux-input@vger.kernel.org>
From: Allen Hung <allen_hung@dell.com>
Message-ID: <5677CA23.9050008@dell.com>
Date: Mon, 21 Dec 2015 17:45:07 +0800
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On 12/18/2015 05:52 AM, Benjamin Tissoires wrote:
> On Thu, Nov 26, 2015 at 3:21 PM, Jiri Kosina <jikos@kernel.org> wrote:
>> On Fri, 20 Nov 2015, Allen Hung wrote:
>>
>>> 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 <allen_hung@dell.com>
>> Applied to for-4.5/multitouch. Thanks,
>>
> Allen, looks like the Dell XPS13 2015 (or was it the 2014?) has
> problems with your patch:
> https://bugzilla.redhat.com/show_bug.cgi?id=1292583 (we backported
> this change in the Fedora kernel 4.2.7).
>
> Would you mind checking that this patch does not create regressions on
> older series of laptops?
>
> Thanks in advance.
>
> Cheers,
> Benjamin
Hi Benjamin,

It looks like a XPS13 2014 but I can confirm this with my colleagues who are in charge of this product line. I don't mind checking this patch with more older series of laptops. I will do it and let you know the status. Should I also test the machines with Fedora 23, or just go with Ubuntu OS? The XPS machines are shipped with Ubuntu.
Btw, the issue reporter said she/he cannot reproduce the issue (posted on Dec. 18).

Regards,
Allen Hung