CONFIG_DEBUG_RK3X_UART0 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging messages via Rockchip RK30/RK31 UART0
configname: CONFIG_DEBUG_RK3X_UART0
Kernel low-level debugging port
└─>Kernel low-level debugging messages via Rockchip RK30/RK31 UART0
In linux kernel since version 3.11 (release Date: 2013-09-02)
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
on Rockchip based platforms.