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Linux/AM5718: Using HDMI (and later LCD) interface during u-boot phase

Stefan Thorlacius
Intellectual 570 points

Part Number: AM5718

Tool/software: Linux

Hi

We have a custom board with an am5781 where we have a HDMI interface (via a PTN3366BSMP).

Is there some example of how to activate and present, for example colour bars on the HDMI during the u-boot start up?

This is for pure "start up test" to show the dispaly is working and colour bars is enough (even if we an idea of presenting different colour bars depening on if something goes wrong wuring the u-boot sequence).

The beagle.c board seems to have a something like this but according to beagle_display_init it uses DVI-D and S-video?

Or can we just copy the stuff that is DVID and it will work?

Regards