On Mon, Feb 05, 2018 at 02:49:55PM -0800, Dmitry Torokhov wrote: > On Sun, Feb 04, 2018 at 04:08:39PM +0100, Pali Rohár wrote: > > Hi! Now playing again with trackpoint connected to ALPS rushmore > > touchpad and I'm seeking a nice feature. Via ALPS PS/2 protocol it > > reports pressure of trackpoint. Parser for it is already implemented in > > alps.c and value is assigned to variable "z". When I just move > > trackpoint z is zero, when I push trackpoint while moving, then z is > > number higher, maximally 32. Variable "z" is set, but unused. > > > > Do we have some input interface which can be used to report this > > pressure of trackpoint to userspace? I can use this feature e.g. as > > additional button... > > We could either do the conversion in kernel and emit BTN_LEFT, or > report ABS_PRESSURE and see if userspace will be able to handle > REL_X/REL_Y/ABS_PRESSURE device. > > Adding Peter. judging by trackpoint history, I'd leave the pressure->click conversion to userspace because every trackpoint may need a different threshold setting. "easier" to have this in userspace with dmi matches etc. plus, converting to BTN_LEFT in the kernel means we cannot use it as a separate interaction anymore. That aside, I think exporting ABS_PRESSURE is fine, that's what it's there for. Nothing will use it for now though, tbh not sure yet how that would be exported from libinput. but worth filing a bug for, please assign it to me. Cheers, Peter -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
