Hi,
I own a odroid c1+ and I use the same image as you (same kernel). Did you do something especial in order to make HDMI work? My odroid gets started, but no imagen no the screen. I tried multiple monitors with no luck.
root@odroidc1:~# uname -a
Linux odroidc1 6.12.28-dirty #2 SMP Thu Aug 13 19:47:10 UTC 2026 armv7l GNU/Linux
root@odroidc1:~#
Best regards!