@mitu I did indeed configure my controller when I first booted up. Had to re-do it a few times because I was having issues with the blue tooth. I guess I must have mucked something up when I re-configured my controller, because I went back to re-configure my input from the emulationstation ui just to make sure, and now the problem is fixed, I feel like such a dope for not trying this, thanks.
There is a naming scheme that the emulator goes by, if you search "retropie psx bios wiki".
You can have all the bios, but the emulator will automatically select from its naming scheme list, the one considered most compatible closest to the top of the list, out of what it can find in the bios folder.
Never really played the PSP and am a bit skeptical to do so if the Pi already has trouble/can't play the PS2
A pi 4 handles many psp games surprisingly well. Even more performance can be gained by overclocking and setting the display resolution to 720p instead of 1080p via the runcommand menu. Some games will require a little frameskipping and others will be fine without it.
Rip your CDs as cue/bin files directly. Verify the files are correct by comparing the checksums for the .bin files and the .cue file's contents with the ones published on redump.org. You can use ImgBurn on Windows to rip the disc to .cue/.bin files.
Has anyone succeeded at running any games at 2x resolution at a reasonable speed? Even on an overclocked Pi4 doesn't seem up to this. This is certainly an emulator that will grow in usefulness as the capability of Raspberry Pis increase although I think I will probably stick with PCSX Rearmed in the short term.
I have been running a few games (spyro, ff1/2, crash bandicoot, ONE) at 4x res, with 32x msaa at over full speed (Vulkan hardware rendering). My pi4 is overclocked, but pretty much stock RetroPie.