Comment 3 for bug 1824259

This may be a kernel driver bug, and a regression from 4.12. See http://www.lattepanda.com/topic-p24689.html?sid=1fa88916eb19dd9d65e0abd3ecbf6210#p24689

This may be a missing piece of platform data in the kernel that would tell it to invert jack detection on this particular board. I will try testing with the functionality added to the kernel in https://github.com/torvalds/linux/commit/4999b0214b05a08b42bbafcb29a0b9c413002d3f which lets you tinker with the platform data at runtime.