Boot failed when replace kernel Image


I try to config lane numes in EP mode. so add dbi register access in config_ep function. but when replaced /boot/Image.
It fails to boot up.
When fallback to original image. it still fails to boot up.

Here is the stuck log:
[ 0.000000] OF: fdt: - 100000000 , 780000000
[ 0.000000] earlycon: tegra_comb_uart0 at MMIO32 0x000000000c168000 (options ‘’)
[ 0.000000] bootconsole [tegra_comb_uart0] enabled
[ 0.000000] Found tegra_fbmem: 00800000@a069c000
[ 0.000000] Found lut_mem: 00002008@a0697000
▒▒WARNING: pll_d3 has no dyn ramp
WARNING: at platform/drivers/mailbox/mail_mach.c:148
WARNING: at platform/drivers/mailbox/mail_mach.c:161
WARNING: at platform/drivers/mailbox/mail_mach.c:177
WARNING: at platform/drivers/mailbox/mail_mach.c:161

Could you help figure me out what is happening?

Thank you very much.

it seems that kernel booting stops, and back to cboot stage.

thank you very much.

How did you add the alternate Image? How did you put the original Image back in place if it no longer booted? What changes were made to “/boot/extlinux/extlinux.conf”?

Which L4T release?