Hi, Jerry
I modified the code as follows.
$OUT/Linux_for_Tegra/bootloader/t186ref/BCT/tegra194-mb1-bct-misc-l4t.cfg
-enable_combined_uart = 1;
+enable_combined_uart = 0;
-spe_uart_instance = 0x2;
+spe_uart_instance = 0xff;
$OUT/Linux_for_Tegra/bootloader/t186ref/BCT/tegra194-mb1-soft-fuses-l4t.cfg
-Verbosity = 4; # 0: Disabled: 1: Critical, 2: Error, 3: Warn, 4: Info, 5: Debug
+Verbosity = 0; # 0: Disabled: 1: Critical, 2: Error, 3: Warn, 4: Info, 5: Debug
However, if you change it and flash the board, the board stops during kernel booting.
And I restored only 'tegra194-mb1-bct-misc-l4t.cfg ’ to its original state.
enable_combined_uart = 1;
spe_uart_instance = 0x2;
Then, the OS booting was completed normally.
Is there a part where I missed something?