@epost.deb Hmmm, I am a bit skeptical about that; mainly because the SoC (on my board <-- this is important!) does not peek for sdcard at all during boot, thus u-boot is not involved; moreover if I read the SARADC2 from userland, I get it in the range of the eMMC-only boot configuration.
I emphasize this is on my board, because the manufacturer can chose the boot configuration placing a pair of resistors on the board. The manufacturer of my board choose the eMMC-only boot configuration.
If I find the two resistors, and remove the "pull-down" one, my board would try booting from all the options.
