linux-kernel - Re: [RFC] Input - synaptics: re-route tracksticks buttons on the Lenovo 2015 series

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Date:	Thu, 5 Feb 2015 21:19:28 -0500
From:	Benjamin Tissoires <benjamin.tissoires@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Andrew Duggan <aduggan@...aptics.com>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] Input - synaptics: re-route tracksticks buttons on the
 Lenovo 2015 series

On Thu, Feb 5, 2015 at 8:49 PM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> On Thu, Feb 05, 2015 at 05:33:07PM -0800, Andrew Duggan wrote:
>> On 02/05/2015 12:38 PM, Benjamin Tissoires wrote:
>> >Lenovos 2015 series has the physical tracktick buttons wired
>> >through the touchpad. The kernel should re-route them through
>> >the pass-through interface.
>> >
>> >Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
>> >---
>> >
>> >Hi Dmitry,
>> >
>> >Well, in one of your replies regarding the Synaptics Lenovo 2015
>> >series, you mentioned that you wouldn't mind having the trackstick
>> >buttons re-routed through the trackstick (pass-through interface).
>> >
>> >I came out with this patch (checkpatch complains a lot about it but
>> >today's setup is not that convenient), and I'd like to hear what you
>> >think of it.
>> >
>> >If you agree to go this path, I'll remove the warnings from checkpatch
>> >and do a proper submission.
>> >
>> >The patch is still not future proof (if Synaptics updates the board like
>> >they did for the *40 series, we will need to fix this all over again),
>> >so I might have a little bit more of work to do. Anyway, it works.
>>
>> I discovered that there is a firmware query to determine if the
>> touchpad has stick buttons which are wired to the touchpad and are
>> reported as extended buttons. Query $01 bit 17 indicates that Query
>> $10 exists. Then Query $10 bit 0 indicates indicates the extended
>> buttons should be mapped to the guest stick buttons.
>>
>> Additional information and some diagrams are in the pdf here:
>> https://www.dropbox.com/s/vv1j4zsytgrw7mm/synaptics-tp-stick-buttons.pdf?dl=0
>
> Awesome, thanks Andrew.
>

Yep, definitively awesome. Also the firmware bump when you will fix
the auto-repeat key will greatly help us.

I'll prepare a patch series tomorrow!

Cheers,
Benjamin
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