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Subject答复: 答复: 答复: [PATCH] input: alps-f ix the issue alps cs19 trackstick do not work.
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.

Best Regards
发件人: Pali Rohár <>
发送时间: Monday, June 10, 2019 6:43 PM
收件人: 劉 曉曉 Xiaoxiao Liu <>
抄送: XiaoXiao Liu <>;;;;;; 曹 曉建 Xiaojian Cao <>;; 斉藤 直樹 Naoki Saito <>; 川瀬 英夫 Hideo Kawase <>
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,


> 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
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