How to check if If i2c-hid and hid-rmi are not used for touchpad?

I'm seeing the following warning in dmesg:

The touchpad works, but I feel that it is not working as well as it used to. I'm on Gentoo with a custom configured kernel. I've recently switched to other distros and came back to Gentoo and reconfigured the kernel from the ground up. I don't believe I did something out of the ordinary with regards to the input devices, so this might be a bug as suggested in dmesg.

If i2c-hid and hid-rmi are not used

My question: how do I check if those are not used?

you might want to try setting psmouse.synaptics_intertouch to 1

Returns nothing, so nothing to set there.