On 2019/6/17 下午3:49, Pali Rohár wrote:

On Monday 17 June 2019 01:29:17 Xiaoxiao Liu wrote:

quoted

Hi Pali,

Since design architecture change of CS19, input device connection has been changed to below architecture,
Touchpad has been moved to I2C connection.

   kernel/host  <--PS/2-->  EC  <--PS/2-->  external PS/2 mouse
            |                 |
            |                <--PS/2-->  trackstick
                |
                 <--I2C-->  Touchpad

Hi, thank you for explanation!

So in our case, ALPS device should not be put into passthrough mode as
there is no device after it.

quoted

In the past TrackPoint does not show in the device list because of TrackPoint was hidden device of Touchpad.
But from CS19, TrackPoint is directly connecting with PS2 port,
3 bytes packet does not need to take affect by other vendors Touchpad format.
So alps.c is no need for CS19 device.

So if trackpoint.c driver is working fine with this configuration, it is
just needed to instruct alps.c to not take this device.

Hello Pali,

When you have time, could you take a look at the patch of v4? It is 
implemented according to our discussion.

Thanks,

Hui.

quoted

Best Regards
Shona
-----邮件原件-----
发件人: Pali Rohár [off-list ref]
发送时间: Wednesday, June 12, 2019 1:39 AM
收件人: dmitry.torokhov@gmail.com
抄送: Hui Wang [off-list ref]; 劉 曉曉 Xiaoxiao Liu [off-list ref]; XiaoXiao Liu [off-list ref]; peter.hutterer@who-t.net; linux-input@vger.kernel.org; linux-kernel@vger.kernel.org; 曹 曉建 Xiaojian Cao [off-list ref]; zhangfp1@lenovo.com; 斉藤 直樹 Naoki Saito [off-list ref]; 川瀬 英夫 Hideo Kawase [off-list ref]