EDP ​​screen adapter board for NanoPC-T4

 
The project has been tested and is working properly.
 
The LCSC prototype is 1.2mm thick, using a JLCSC 7628 structure. The minimum line spacing is 6mil.
 
**Note:** Pay close attention to the orientation of the EDP ribbon cables at both ends!!!
**Note:** Pay close attention to the orientation of
the EDP ribbon cables at both ends!!! **Note:** Pay close attention to the orientation of the EDP ribbon cables at both ends!!!
Don't ask me how I know this…
 
The specific type of ribbon cable used depends on your screen; I used two correctly aligned ribbon cables this time.
 
 
The resistors soldered on the PCB are pull-up resistors for the EDP AUX channel. During debugging, because the NanoPC-T4 board had them but they weren't installed, I added them;
 
in practice, they weren't needed. There was a very frustrating experience when adapting the device tree. The FriendlyARM 4.19 kernel source code had significant compatibility issues with the T4, and there was absolutely no software support. As a beginner, I struggled for a very long time. Either the screen backlight wasn't working and the panel displayed normally, or the backlight was working but the panel wasn't. I especially want to complain about FriendlyARM's software support. I applied to four support groups and only got into two after a month, and those groups were completely inactive with no replies or daily chat.
 
Finally, I discovered, to my dismay, that FriendlyARM automatically turns off the backlight after recognizing the panel, requiring manual activation! No matter how absurd this is, it actually works. Finally, I wrote a shell script and placed it in the system startup directory to "manually" turn on the backlight at startup...
 
Finally, the screen lit up and I got to the desktop. The white bars were because the screen was defective; after replacing the screen, it returned to normal.
 
 
Finally, here's a picture of Genshin Impact using an adapter (doge).