Coolpi 4b support dynamic update logo

[大法师]

Sometimes we may need to customize the logo display. We just need to copy logo bmp files to first partition of tf-card or emmc. Two logo files can be the same.

It should be noted that uboot must be upgraded to the latest.
uboot-20230222.zip

Ubuntu 22.04.1 LTS coolpi ttyS0

coolpi login: coolpi
Password: 
Welcome to Ubuntu 22.04.1 LTS (GNU/Linux 5.10.110 aarch64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

This system has been minimized by removing packages and content that are
not required on a system that users do not log into.

To restore this content, you can run the 'unminimize' command.

56 updates can be applied immediately.
27 of these updates are standard security updates.
To see these additional updates run: apt list --upgradable


The list of available updates is more than a week old.
To check for new updates run: sudo apt update
Last login: Wed Feb 22 06:11:20 UTC 2023 on ttyS0
coolpi@coolpi:~$ sudo cp logo.bmp logo_kernel.bmp /boot/firmware/
[sudo] password for coolpi: 
coolpi@coolpi:~$ sudo reboot