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Overlay for Raspberry Pi 7" Display for Rock4b (or SE)


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I was merely searching on the forum for info on how to find overlays and came across your post, as I too have an unrelated issue with Rock4b (or SE) overlays.

As a complete noob on overlays I had a quick look through that overlay file and simply wondered if you are using the right overlay file for the pin header you're using.


Looking at the Rock4 SE schematic, that said overlay points to I2C1 which is attached to I2C_SDA_AUDIO/I2C_SCL_AUDIO which then feeds into an audio codec device (ES8316) and then into J8204 15PH. If you are using J8203 15PH then it uses I2C4, which must be a different overlay.


Of course I could be talking nonsense here 😬


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