RE: [PATCH 1/2] Alps HID I2C T4 device support

[Masaki Ota <masaki.ota@jp.alps.com>]

Hi, Nikolaus,

There is no 044E:120C device, but it looks like Alps Touchpad is detected as PS/2 Touchpad.

Actually, this Touchpad has two interfaces. One is I2C, the other is PS/2.
Default setting is I2C, and if the system does not support I2C, Touchpad works as PS/2.

However, both of interface should work properly on Linux.
I tested it on Ubuntu +4.10 kernel.

If you don't apply my patch, does device work as I2C? (044E:120C appears?)

Best Regards,
Masaki Ota
-----Original Message-----
From: Nikolaus Rath [mailto:Nikolaus@rath.org] 
Sent: Wednesday, April 05, 2017 2:09 AM
To: 太田 真喜 Masaki Ota <masaki.ota@jp.alps.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>; linux-input@vger.kernel.org
Subject: Re: [PATCH 1/2] Alps HID I2C T4 device support

Hi Masaki,

Yes, I think I have a 044E:120C. Is there a way to find out for sure?
It's not listed by e.g. lspci.

The touchpad is definitely not reacting to anything. evemu-record does not show any events either.

I have attached the dmesg output.

Best,
-Nikolaus


On Apr 04 2017, Masaki Ota <masaki.ota@jp.alps.com> wrote:
> Hi, Nikolaus,
>
> Your Touchpad is 044E:120C, right?
>
> PATCH 1/2 supports 044E:120C Touchpad device.
> I think you can use all features of this Touchpad.
>
> PATCH 2/2 supports 044E:1215 Touchpad device.
> You don't need to care about this.
>
> If Touchpad does not work completely, there is something an error.
> What does dmesg show?
>
> Best Regards,
> Masaki Ota
> -----Original Message-----
> From: Nikolaus Rath [mailto:Nikolaus@rath.org]
> Sent: Tuesday, April 04, 2017 12:09 PM
> To: 太田 真喜 Masaki Ota <masaki.ota@jp.alps.com>; linux-kernel 
> <linux-kernel@vger.kernel.org>; linux-input@vger.kernel.org
> Subject: Re: [PATCH 1/2] Alps HID I2C T4 device support
>
> Hi Ota,
>
>> -Support Alps HID I2C T4 Touchpad device.
>> -Laptop names that use this Touchpad:HP Zbook Studio, Elitebook Folio 
>> G1, Elitebook 1030 G1, Elitebook 1040 G3
>>
>> Signed-off-by: Masaki Ota <masaki.ota@xxxxxxxxxxx>
>> ---
>>  drivers/hid/hid-alps.c | 500 +++++++++++++++++++++++++++++++++++++++----------
>>  drivers/hid/hid-core.c |   3 +-
>>  drivers/hid/hid-ids.h  |   1 +
>>  3 files changed, 403 insertions(+), 101 deletions(-)
>  
> I tried your patch on an HP Elitebook, but with rather limited success. Before, I was able to use the touchpad in limited fashion (https://bugs.freedesktop.org/show_bug.cgi?id=100345). With your patch (applied on top of 4.10), the touchpad no longer reacts at all.
>
> That said, I didn't find a patch 2/2 anywhere.. is there something missing?
>
> Thanks,
> -Nikolaus
>
> --
> GPG Fingerprint: ED31 791B 2C5C 1613 AF38 8B8A D113 FCAC 3C4E 599F
>
>              »Time flies like an arrow, fruit flies like a Banana.«


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