Resolved! Modifying an external in-tree Linux kernel module unsuccessfully
Following the instruction from https://wiki.st.com/stm32mpu/wiki/How_to_cross-compile_with_the_Developer_Package#Modifying_the_Linux_kernel_device_tree.........root@stm32mp1:~# modprobe vivid[ 903.683914] cec: version magic '4.19.94 SMP preempt mod_u...