Serial port configuration

    Hello,

    I have a strange issue on my RK3036 the console should be on ttyS2.

    When I boot with the "stock" rockchip kernel this is what I get:

    [ 0.541192] 20060000.serial: ttyS0 at MMIO 0x20060000 (irq = 43, base_baud = 1500000) is a 16550A

    [ 0.543286] console [ttyS2] disabled

    [ 0.563776] 20068000.serial: ttyS2 at MMIO 0x20068000 (irq = 44, base_baud = 1500000) is a 16550A

    [ 1.451507] console [ttyS2] enabled


    however with the LibreElec config I get:

    [ 5.208566] ttyS2 - failed to request DMA


    Any hint what might be wrong? I noticed that the kernel config is completely different in LibreElec what is stored in the rockchip-linux/kernel config

    (e.g. Tinkerboard's config is completely different compared with the corresponding RKxx defconfig (which is practically rockchip_linux-defconfig)

    Thanks,