CM3 Official Display, Can it only be enabled by a custom dt-blob.bin file?

[hrsmjjames]

Hi all,

A while ago I started using the CM3 and used https://www.raspberrypi.org/documentati ... display.md to build a custom dt-blob.bin to enable the display. I'm not revisiting this as I want to use Noobs with the device and found I could only get the display to work with Noobs when my dt-blob.bin was on the recovery partition.

Am I correct in that you can't enable the official display with the CM3 just by providing an overlay via config.txt, you have to always use a dt-blob.bin?

Thanks

[6by9]

You are correct.

There are parameters for things like which I2C peripheral and GPIOs, and DSI port the display is connected to which are not defined by the CM board as you could route it anywhere, and which are a function of the firmware so don't fit in the Linux device tree. That info therefore has to go in dt-blob.bin. It's the same for the camera modules.

[hrsmjjames]

Brilliant, thanks for confirming this