U-Boot kernel parameter does not work

Technical Support
, , ,
1

Environment
BSP5.5
Apalis-iMX8
EVA board

U-Boot parameters such as “console” and “badrate” have not been applied to the kernel.
The U-Boot script is strange.
Probably the effect of the boot method being Distroboot.

Best regards.

2

Please describe the problem!
What files have you modified?
How do you check?

3

You can check the kernel parameters below.
cat / proc / cmdline

However, the kernel parameters do not include ttyLP1.
The console and baudrate parameters are not reflected.

Enter the following command in U-Boot.

setenv console ttyLP3 earlycon
saveenv
reset

Normally it can be changed to UART2, but it is not reflected.

Best regards.

4

Hi @developer0916 , have you tried tdxargs?

5

It is possible to change it by changing tdxargs,
But should console, baudrate, etc. work?
The existence of unused settings is misleading.
This is a small issue.

Best regards.

6

Starting with BSP 5, all the custom Kernel Parameters should be added under tdxargs. So both console with the baudrate should be set under tdxargs.

Here is the complete list: The kernel’s command-line parameters — The Linux Kernel documentation

Try:

setenv tdxargs '${tdxargs} console=<port>,<baudrate>'
saveenv

Kind regards,
Alvaro.