linux-kernel - Re: [PATCH 1/4] Input: Add trackpoint doubletap and system debug info keycodes

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Date: Tue, 16 Apr 2024 10:35:22 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Mark Pearson <mpearson-lenovo@...ebb.ca>,
 Peter Hutterer <peter.hutterer@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Henrique de Moraes Holschuh <hmh@....eng.br>,
 ibm-acpi-devel@...ts.sourceforge.net,
 "platform-driver-x86@...r.kernel.org" <platform-driver-x86@...r.kernel.org>,
 linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
 Nitin Joshi1 <njoshi1@...ovo.com>, Vishnu Sankar <vsankar@...ovo.com>
Subject: Re: [PATCH 1/4] Input: Add trackpoint doubletap and system debug info
 keycodes

Hi,

On 4/15/24 9:58 PM, Dmitry Torokhov wrote:
> On Mon, Apr 15, 2024 at 09:50:37PM +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 4/15/24 9:40 PM, Dmitry Torokhov wrote:
>>> On Wed, Apr 10, 2024 at 10:48:10PM -0400, Mark Pearson wrote:
>>>>
>>>> I have a stronger preference to keep the KEY_DOUBLECLICK - that one seems less controversial as a genuine new input event.
>>>
>>> Please see my response to Peter's letter. I think it very much depends
>>> on how it will be used (associated with the pointer or standalone as it
>>> is now).
>>>
>>> For standalone application, recalling your statement that on Win you
>>> have this gesture invoke configuration utility I would argue for
>>> KEY_CONFIG for it.
>>
>> KEY_CONFIG is already generated by Fn + F# on some ThinkPads to launch
>> the GNOME/KDE control center/panel and I believe that at least GNOME
>> comes with a default binding to map KEY_CONFIG to the control-center.
> 
> Not KEY_CONTROLPANEL?

No when this was added most distros were still using X11 not Wayland so
it was preferable to use KEY_foo symbols with codes below 240.

> Are there devices that use both Fn+# and the doubleclick? Would it be an
> acceptable behavior for the users to have them behave the same?

That is a good question, at least my current ThinkPad does not have
the Fn + F## combo for the control center anymore. So I guess we could
indeed re-use KEY_CONFIG for the double-tap.

Regards,

Hans