It’s nice that Microsoft is pushing for all pen tablet (stylus) support in laptops to use the obvious generic set of HID reports. Quite probably, Microsoft is to thank for the Wacom touchscreen in my Pixelbook implementing that. I’ve seen the heaps of code in the Linux kernel to support Wacom’s custom protocols, that would’ve been very NOT fun to implement :)

Took like an hour max to get to working reports in console (dmesg), all that’s left is to evdev-ify it. Coming to iichid pull requests soon (but for now there’s no multiple device support in hidbus, so won’t be mergeable yet).