On Tue, Apr 09, 2024 at 02:47:05PM -0700, Dmitry Torokhov wrote:
On Tue, Apr 09, 2024 at 03:23:52PM +1000, Peter Hutterer wrote:
On 09/04/2024 09:31, Dmitry Torokhov wrote:
Hi Mark,
On Sun, Mar 24, 2024 at 05:07:58PM -0400, Mark Pearson wrote:
Add support for new input events on Lenovo laptops that need exporting to
user space.
Lenovo trackpoints are adding the ability to generate a doubletap event.
Add a new keycode to allow this to be used by userspace.
What is the intended meaning of this keycode? How does it differ from
the driver sending BTN_LEFT press/release twice?
Lenovo support is using FN+N with Windows to collect needed details for
support cases. Add a keycode so that we'll be able to provide similar
support on Linux.
Is there a userspace consumer for this?
Funnily enough XKB has had a keysym for this for decades but it's not
hooked up anywhere due to the way it's pointer keys accessibility
feature was implemented. Theory is that most of userspace just needs
to patch the various pieces together for the new evdev code + keysym,
it's not really any different to handling a volume key (except this
one needs to be assignable).
What is the keysym? If we can make them relatable to each other that
would be good. Or maybe we could find a matching usage from HID usage
tables...
I was looking through the existing codes and I see:
#define KEY_INFO 0x166 /* AL OEM Features/Tips/Tutorial */
We also have KEY_VENDOR used in a few drivers/plafrom/x86, including
thinkkpad_acpi.c and I wonder if it would be suitable for this vendor
specific debug info collection application (which I honestly doubt will
materialize).