Gamepad configuration issue, Linux (Pinephone)

[gamerminstrel]

This is admittedly a bit of a niche issue, but I'm hoping for some help (or at least someone to point me in the right direction);

I have a Pinephone (basically a smartphone running Full Linux(Debian) instead of Android), and a Razer Kishi gamepad.

Connecting the Razer Kishi to my Android smartphone, PPSSPP works exactly as intended. But PPSSPP on the Pinephone has inconsistent/wrong inputs.

-The DPAD is not recognized at all.
-When navigating the PPSSPP Menu, up and down on the joystick are inverted. This is not an issue when I try running games (cave story form the homebrew channel for testing)

Extra credit- I don't know if this is an issue specifically with PPSSPP, but trying to use the touch screen on PPSSPP makes the pinephone freak out, flickering and causing ghost inputs until I close the app.