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From:   Hui Wang <hui.wang@canonical.com>
To:     Xiaoxiao Liu <xiaoxiao.liu-1@cn.alps.com>,
        =?UTF-8?Q?Pali_Roh=c3=a1r?= <pali.rohar@gmail.com>
Cc:     XiaoXiao Liu <sliuuxiaonxiao@gmail.com>,
        "dmitry.torokhov@gmail.com" <dmitry.torokhov@gmail.com>,
        "peter.hutterer@who-t.net" <peter.hutterer@who-t.net>,
        "linux-input@vger.kernel.org" <linux-input@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Xiaojian Cao <xiaojian.cao@cn.alps.com>,
        "zhangfp1@lenovo.com" <zhangfp1@lenovo.com>,
        Naoki Saito <naoki.saito@alpsalpine.com>,
        Hideo Kawase <hideo.kawase@alpsalpine.com>
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Message-ID: <5587ddb9-fb5f-03db-ac11-a696c85c5f2f@canonical.com>
Date:   Tue, 11 Jun 2019 12:32:33 +0800
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On 2019/6/11 上午11:23, Hui Wang wrote:
> On 2019/6/11 上午11:05, Xiaoxiao Liu wrote:
>> Hi Pali,
>>
>> I discussed with our FW team about this problem.
>> We think the V8 method means a touchpad feature  and does not fit the 
>> CS19 trackpoint device.
>> CS19 TrackPoint needn't  use any Absolute (Raw) mode and is usually 
>> use standard mouse data.
>> CS19 TrackPoint device is a completely different device with 
>> DualPoint device of Dell/HP.
>> CS19 TrackPoint device is independent  of Touchpad. (Touchpad is 
>> connecting by I2C, TrackPoint is directly connecting with PS2 port.)
>> And it has completely another FW.
>>
>> So we think it is better to use the mouse mode for CS19 trackpoint.
>
> Maybe here is some mis-understanding,  the mouse mode here doesn't 
> mean we use psmouse-base.c for cs19 (bare ps/2 mouse), we plan to use 
> trackpoint.c to drive this HW, so this trackpoint has all features a 
> trackpoint should have.
>
And I sent a patch one month ago to let the the trackpoint.c to drive 
this HW: https://www.spinics.net/lists/linux-input/msg61341.html, maybe 
that patch is reference.
> Regards,
>
> Hui.
>
>>
>> Best Regards
>> Shona
>> -----邮件原件-----
>> 发件人: Pali Rohár <pali.rohar@gmail.com>
>> 发送时间: Monday, June 10, 2019 6:43 PM
>> 收件人: 劉 曉曉 Xiaoxiao Liu <xiaoxiao.liu-1@cn.alps.com>
>> 抄送: XiaoXiao Liu <sliuuxiaonxiao@gmail.com>; 
>> dmitry.torokhov@gmail.com; peter.hutterer@who-t.net; 
>> hui.wang@canonical.com; linux-input@vger.kernel.org; 
>> linux-kernel@vger.kernel.org; 曹 曉建 Xiaojian Cao 
>> <xiaojian.cao@cn.alps.com>; zhangfp1@lenovo.com; 斉藤 直樹 Naoki Saito 
>> <naoki.saito@alpsalpine.com>; 川瀬 英夫 Hideo Kawase 
>> <hideo.kawase@alpsalpine.com>
>> 主题: Re: 答复: 答复: [PATCH] input: alps-fix the issue alps cs19 
>> trackstick do not work.
>>
>> On Monday 10 June 2019 10:03:51 Xiaoxiao Liu wrote:
>>> Hi Pali,
>> Hi!
>>
>>> We register our CS19 device as ALPS_ONLY_TRACKSTICK device.
>>> And let the V8 protocol function support the process of 
>>> ALPS_ONLY_TRACKSTICK device.
>>>
>>> I want to confirm if this solution OK?
>> Yes, it is fine. Just make sure that touchapad input device is not 
>> registered when this ALPS_ONLY_TRACKSTICK flag is set. So userspace 
>> would not see any fake/unavailable touchpad input device.
>>
>>> Xiaoxiao.Liu
>> -- 
>> Pali Rohár
>> pali.rohar@gmail.com