kernel >= 4.19.90 won't boot

It seems kernel version starting from 4.19.90 won't boot on my pyra. 4.19.89 is the last one that works.

They all get stuck on "Starting kernel ..." in uboot.

I've tried the latest letux image too, to confirm it's not something in my compile/packaging process, or custom uboot, but that doesn't boot either ( kernel Linux-4.19.95-letux-lpae+ , with omap5-letux-cortex15-v5.3+pyra-v5.2.dtb )

I've also tried the 5.4.11 kernel, that boots , but /sys/devices/platform/txs02612/switch doesn't exist there, so it can't find the emmc.

(and the display turns off after a second or so, but i think that was a known problem for the 5.x kernels)