PX30 Android8.1系统Uboot没有打印信息

路径：px30_android-8.1\u-boot\configs\evb-px30_defconfig
波特率错误，修改115200

打印信息：

Rockchip UBOOT DRM driver version: v1.0.0
LVDS: data mapping: vesa, data-width:24, format:0,
Using display timing dts
Detailed mode clock 71100 kHz, flags[a]
    H: 1280 1298 1308 1408
    V: 0800 0806 0808 0816
bus_format: 1011
CLK:      apll           600000000 Hz
          dpll           664000000 Hz
          cpll           640000000 Hz
          npll          1188000000 Hz
          gpll          1200000000 Hz
      aclk_bus           200000000 Hz
      hclk_bus           150000000 Hz
      pclk_bus           100000000 Hz
     aclk_peri           200000000 Hz
     hclk_peri           150000000 Hz
      pclk_pmu           100000000 Hz
Hit any key to stop autoboot:  0 
ca head not found
ANDROID: reboot reason: "recovery"
** Invalid Android Image header **
android_bootloader_boot_flow recovery part load fail
Android boot failed, error -1.
ca head not found
get share memory, arg0=0x0 arg1=0x9e00000 arg2=0x400000 arg3=0x1INFO:    USER-TA: Hello Rockchip Keymaster! rpmb :0
INFO:    USER-TA: TEE_ReadObjectData success !
INFO:    USER-TA: Goodbye Rockchip Keymaster!
do_boot_rockchip boot from Recovery partition!
=Booting Rockchip format image=
kernel   @ 0x02080000 (0x01255808)
ramdisk  @ 0x0a200000 (0x015a6864)
## Flattened Device Tree blob at 01f00000
   Booting using the fdt blob at 0x1f00000
   Loading Ramdisk to 06c59000, end 081ff864 ... OK
   Loading Device Tree to 0000000006c44000, end 0000000006c58399 ... OK
Adding bank: start=0x00200000, size=0x08200000
Adding bank: start=0x0a200000, size=0x35e00000
Can't find file:logo_kernel.bmp