I did test Tony's binaries on four different PCBs.
Always with the same result:
U-Boot SPL 2016.11-00247-g97ece0bff7 (Sep 11 2017 - 20:25:07) OMAP5432-GP ES2.0 SDRAM: identified size not same as expected size identified: 4 expected: 40000000
spl:board_init_r()
spl_init() Trying to boot from MMC1 WARNING: DDR RAM is not working! (12340078) Found LC15 V5.1 board_mmc_init called (vers = 51) MLO hard: gpio7 = eMMC soft: gpio82 = 0 (mmc1=eMMC) ctrl: gpio76 = 1 (ctrl=soft) MMC Device 0 not found spl: could not find mmc device. error: -19 SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ###ä
The number in the brackets behind DDR RAM is not working! is different with each PCB but seems to be consistent for each one.
Is that the issue you had as well, Nikolaus?
One more idea: Tony, as it worked for you with either 1.39V (or was it 1.42V?) OR DLL off, maybe both have a positive effect?
What about a build with 1.39V with DLL off?
Could you please provide a build with that?