On Tue, Nov 9, 2021 at 4:23 PM Nikita Travkin <nikita@xxxxxxx> wrote: > [Me] > > Have you notices some behaviour like surplus touch events > > (like many press/release events fall through to the UI) > > when using this driver? I think it might need some z fuzzing > > but I am not sure. > > > > On my device (8 inch tablet with BT532) I saw no problems with touch > so far. However another person with a different tablet (10 inch with > ZT7554) > indeed says that they notice "multiplied" touches that make typing hard > so maybe that depends on controller model/firmware... It may even be depending on specimen. I saw that the vendor driver does contain some debouncing code. > And speaking of that ZT7554: Seems like it's works with the driver > and I'd like to add the compatible for it in v2 but I'd also have to add > it to the bindings. Looking at how you add all other similar names for BT* > there does it make sense to add ZT* as well? Yeah probably, if they are electrically very similar. > Maybe you have some hints where > to look for a list of the models? I usually google ... try to find things like powerpoints with roadmaps from the vendor and things like that. Best thing is if they answer to mail but I don't know if Zinitix are even around anymore. > I've noticed a yet another quirky issue with the touch controller: > At least on my device, for some reason enabling touchkeys changes the > way the > controller reports the finger touch events which breaks multi-touch... > Assuming that *not* enabling the touchkeys leads to calibration being > wrong > (controller assigns the touchkey sense lines to the touch area in that > case) > I now have to resolve this quirk as well... Hm yeah I guess refer to the (messy) vendor driver for hints. Yours, Linus Walleij
