drm/msm eDP problem

drm/msm eDP problem

[antonets]

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Hi all,

HW: QCS6490 custom board, close to RB3Gen2. SW: Ubuntu 24.04.5 kernel
6.8.0-1084.89.

I'm using DRM/MSM with the eDP interface set to maximum debug output.
Everything looks great, with no error messages at all.

However, the screen is blank.

A few details.

On the same hardware modifications with a DSI interface, everything works
flawlessly.

On hardware with an eDP interface running the QCLinux version (DRM/SDE),
everything works (SDE source code is available).

I've spent 5 months trying to find the problem, so far without success.
There's a lot of debugging information, and I didn't include it in this
post. If necessary, I can provide it.

Conclusion: I'm missing some small detail.

An aggravating factor is that I don't have access to the documentation for
HW.

Ultimately, I need advice on which part of DRM might be the problem.

 

Thanks,

Dmitriy Antonets

 

 


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