HDMI drive register permanence


We tuned the HDMI drive strength on our TX2 system in order to meet EMC requirements using devmem2 per DA-09326-001_v1.7. Of course, those changes do not persist between power-ups, or even HDMI hot plug events.

How can we make these register changes permanent/default?


You have to write it to the prod settings in device tree.


Thank you very much for the quick reply! Is it right for me to conclude, then, that making this change entails rebuilding the kernel?

Rebuilding the dtb is sufficient. No need to build the full kernel image/modules.

Ok, understood. Thank you very much, Wayne!