I found two related threads suggesting that falcon mode may not be supported on this processor.
Specifically, one saying k3 processors do not support falcon mode, and another saying that J721e does not have support.
I'm not asking if there is support today, but is it possible to implement on this processor by modifying u-boot-ti-staging.
I'd like to follow the AM62 FAQ that was released earlier this year, which seems to hint having k3 is actually not an issue.
What other documentation is there to improve cold boot time?
I'm not seeing any reason falcon mode couldn't be implemented specifically on the A72 u-boot image.