Apologies if this info is already out there, but I think what I'm trying to do is unique and so have been coming up short on my searches.
I have a 2014 double cab with Entune Premium + Nav (no JBL).
Utilizing a small computer (i.e. a Raspberry Pi), I want to be able to push video to the Head Unit LCD, and audio to the speaker system in the vehicle.
Via a toggle switch, I'd like to switch the video display to the computer instead of the radio interface (similar to how the rear-view camera switches on when in reverse). Theoretically if I do the mod to allow me to view the reverse camera at any time, I can splice into the video wire with another switch to the computer video output, right? The computer has an RCA video-out.
I'd also like to create an always-on connection from the computer to the speaker system so that at any time (even if radio is playing), I can feed audio to the speakers. The computer has a 3.5mm audio-out jack.
Can anybody tell me if either of the two objectives above are feasible? Thanks.