how to support(register) multiple input devices?

[incity]

There is no interface to register devices with libinput_read_state.(3 parameters)

[kisvegabor]

@Johennes could you comment on this?

[Johennes]

@incity you need to define a custom callback and inside of it call libinput_read_state with the state extracted from the driver's user_data field. See e.g. https://gitlab.com/cherrypicker/unl0kr/-/blob/master/indev.c#L357.