Unable to use ceemmc

After reinstalling Android on the eMMC, I am unable to boot the 9.2.1 nor the 9.2.0 image from the SD card. It is stuck on the Khadas logo.

On the serial console, nothing seems to happen after:

Starting kernel ...

uboot time: 5889137 us
[    0.000000@0] Booting Linux on physical CPU 0x0
[    0.000000@0] Linux version 4.9.190 (adamg@zulu) (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36)) ) #1 SMP PREEMPT Sun Sep 15 17:53:52 BST 2019
[    0.000000@0] Boot CPU: AArch64 Processor [410fd034]
[    0.000000@0] Machine model: Khadas
[    0.000000@0] earlycon: aml-uart0 at MMIO 0x00000000ff803000 (options '')
[    0.000000@0] bootconsole [aml-uart0] enabled
bl31 reboot reason: 0x0
bl31 reboot reason: 0x0