earlycon serial support for imx8mq

[amitt]

Hello

Wondering if earlycon support has well tested on imx8mq based SoC ?

We are working on, boundry device provided Nitrogen8m board based on imx8mq SoC.

Nitrogen8M - An NXP i.MX8 M Single Board Computer Platform .

While testing earlycon serial support we just see garbage on our console, This is how our chosen node looks like:

      chosen {
                    bootargs = "console=ttymxc0,115200 earlycon=ec_imx6q,0x30860000,115200";
                    stdout-path = &uart1;
        };

We don't have anything set in bootargs from u-boot and following is how we load our kernel

setenv ipaddr 10.105.2.28;setenv serverip 10.105.2.27;tftp 0x40480000 Image;tftp 0x43000000 imx8mq-nitrogen8m.dtb
booti 0x40480000 - 0x43000000

Starting kernel ...

� ����� ������� � ���� � ��� �� ��� � ����� � � � �� �� ���� ����� ������� �� ��� � �� � � � ������ � �������� � ���� �� �� � �� �� �� � � � � � � � ���� � ��������� �� �

All, we see is random chars on console.

[b36401]

There should be nothing special to earlycon.
Please make sure that you are set the same serial port options in bootargs and terminal running on the PC.

Have a great day,
Victor

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