With video output enabled and USB keyboard supported there is no need for serial console. So let initialize USB subsystem so keyboard connected to board (either directly or via hub) can be used to interrupt autoboot.
U-Boot TPL 2020.07-rc3-00123-g52d6cbd1a7 (Jun 03 2020 - 17:34:20) Channel 0: LPDDR4, 50MHz BW=32 Col=10 Bk=8 CS0 Row=16/15 CS=1 Die BW=16 Size=2048MB Channel 1: LPDDR4, 50MHz BW=32 Col=10 Bk=8 CS0 Row=16/15 CS=1 Die BW=16 Size=2048MB 256B stride 256B stride lpddr4_set_rate: change freq to 400000000 mhz 0, 1 lpddr4_set_rate: change freq to 800000000 mhz 1, 0 Trying to boot from BOOTROM Returning to boot ROM... U-Boot SPL 2020.07-rc3-00123-g52d6cbd1a7 (Jun 03 2020 - 17:34:20 +0200) Trying to boot from SPI U-Boot 2020.07-rc3-00123-g52d6cbd1a7 (Jun 03 2020 - 17:34:20 +0200) SoC: Rockchip rk3399 Reset cause: RST Model: Pine64 RockPro64 v2.1 DRAM: 3.9 GiB PMIC: RK808 MMC: mmc@fe310000: 2, mmc@fe320000: 1, sdhci@fe330000: 0 Loading Environment from SPI Flash... SF: Detected gd25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB OK In: serial Out: vidconsole Err: vidconsole Model: Pine64 RockPro64 v2.1 Net: eth0: ethernet@fe300000 starting USB... Bus usb@fe380000: USB EHCI 1.00 Bus usb@fe3a0000: USB OHCI 1.0 Bus usb@fe3c0000: USB EHCI 1.00 Bus usb@fe3e0000: USB OHCI 1.0 Bus dwc3: Register 2000140 NbrPorts 2 Starting the controller USB XHCI 1.10 Bus dwc3: Register 2000140 NbrPorts 2 Starting the controller USB XHCI 1.10 scanning bus usb@fe380000 for devices... 1 USB Device(s) found scanning bus usb@fe3a0000 for devices... 1 USB Device(s) found scanning bus usb@fe3c0000 for devices... 1 USB Device(s) found scanning bus usb@fe3e0000 for devices... 2 USB Device(s) found scanning bus dwc3 for devices... 1 USB Device(s) found scanning bus dwc3 for devices... 2 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found Hit any key to stop autoboot: 0 => Signed-off-by: Marcin Juszkiewicz <mar...@juszkiewicz.com.pl> --- configs/rockpro64-rk3399_defconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git configs/rockpro64-rk3399_defconfig configs/rockpro64-rk3399_defconfig index 807747485a..a56126b042 100644 --- configs/rockpro64-rk3399_defconfig +++ configs/rockpro64-rk3399_defconfig @@ -11,6 +11,8 @@ CONFIG_DEBUG_UART_CLOCK=24000000 CONFIG_SPL_SPI_FLASH_SUPPORT=y CONFIG_SPL_SPI_SUPPORT=y CONFIG_DEBUG_UART=y +CONFIG_USE_PREBOOT=y +CONFIG_PREBOOT="usb start" CONFIG_DEFAULT_FDT_FILE="rockchip/rk3399-rockpro64.dtb" CONFIG_MISC_INIT_R=y CONFIG_DISPLAY_BOARDINFO_LATE=y -- 2.26.2