AGX Xavier can i change the log picture by using dd to change the mmcblk0p28

Hi everyone
I want to change the log picture from NVIDIA starting up picture to my defining picture
1 - I use command find that BMP is mmcblk0p28, so can i just use the dd command with my genarating xxx.blob file to change the log picture?
2 - if this is not ok, does have any other way to change the stating up picture without using recovery mode?

root@dev-desktop:/# ls -al /dev/disk/by-partlabel/
total 0
drwxr-xr-x 2 root root 880 8月  24 10:25 .
drwxr-xr-x 7 root root 140 8月  24 10:25 ..
lrwxrwxrwx 1 root root  16 8月  24 10:25 BMP -> ../../mmcblk0p28
lrwxrwxrwx 1 root root  16 8月  24 10:25 BMP_b -> ../../mmcblk0p29

Thank you very much!
Best wishes with you.

please refer to

→ Linux_for_Tegra/tools/bmp-splash/bmp-blob-README.txt

We don’t guarantee dd. If you want to try the OTA upgrade, you can check the bootloader update method.