I get "No serial driver found" error when I have compiled u-boot

Hello to everyone.

I tried to compile u-boot version 2020.07 + the patches offered here :

https://personalbsd.org/download/u-boot-ports/u-boot-khadas-edge-v-2020.07/

without changing anything. That's old but I want to compile everything to
see if it is able to turn on and make my monitor work correctly at
1920x1080.

So,the procedure that I followed has been the following.

First off I went to another board's build and I checked if a defconfig file
exists for this board.


1) Checked ./u-boot/configs/ directory :

/usr/ports/sysutils/u-boot-radxa-zero3/work/u-boot-2025.07-rc2/configs/khadas-edge-v-rk3399_defconfig


Then I found the defconfig file for the board and I tried to build a slave
u-boot port for the khadas :


# mkdir /usr/ports/sysutils/u-boot-khadas-edge-v

# cd /usr/ports/sysutils/u-boot-khadas-edge-v

# ee Makefile

MASTERDIR=      ${.CURDIR}/../u-boot-master

MODEL=          khadas-edge-v
BOARD_CONFIG=   khadas-edge-v-rk3399_defconfig
FAMILY=         rk3399

.include "${MASTERDIR}/Makefile"


2) Then I created the package description file :


# ee pkg-descr

U-Boot loader and related files for the khadas-edge-v :

To install this bootloader on an sdcard just do:

dd if=/usr/local/share/u-boot/u-boot-khadas-edge-v/idbloader.img
of=/path/to/sdcarddevice seek=64 conv=sync

dd if=/usr/local/share/u-boot/u-boot-khadas-edge-v/u-boot.itb
of=/path/to/sdcarddevice seek=16384 bs=512 conv=sync


3) At this point I tried to build the port :


Installed dependencies:

# make build-depends-list | cut -c 12- | xargs pkg install -A -y


Tried to build it :

# make install

What happened :


U-Boot TPL 2020.07 (Aug 26 2025 - 18:13:49)

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...

No serial driver found

resetting ...


This is my defconfig file :


CONFIG_ARM=y
CONFIG_ARCH_ROCKCHIP=y
CONFIG_SYS_TEXT_BASE=0x00200000
CONFIG_SYS_SPI_U_BOOT_OFFS=0x60000
CONFIG_ENV_SIZE=0x8000
CONFIG_ENV_SECT_SIZE=0x1000
# CONFIG_NR_DRAM_BANKS=1
CONFIG_DM_KEYBOARD=y
CONFIG_DISPLAY=y
CONFIG_VIDEO_ROCKCHIP=y
CONFIG_DISPLAY_ROCKCHIP_HDMI=y
CONFIG_ENV_OFFSET=0x3F8000
CONFIG_ROCKCHIP_RK3399=y
CONFIG_TARGET_EVB_RK3399=y
CONFIG_NR_DRAM_BANKS=1
CONFIG_DEBUG_UART_BASE=0xFF1A0000
CONFIG_DEBUG_UART_CLOCK=24000000
CONFIG_DEBUG_UART=y
CONFIG_DEFAULT_FDT_FILE="rockchip/rk3399-khadas-edge-v.dtb"
CONFIG_DISPLAY_BOARDINFO_LATE=y
# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
CONFIG_SPL_STACK_R=y
CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x10000
CONFIG_TPL=y

Mariuccio, [26 Aug 2025 22:23:59]
CONFIG_SYS_PROMPT="kedge# "
CONFIG_CMD_BOOTZ=y
CONFIG_CMD_GPT=y
CONFIG_CMD_MMC=y
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_TIME=y
CONFIG_SPL_OF_CONTROL=y
CONFIG_DEFAULT_DEVICE_TREE="rk3399-khadas-edge-v"
CONFIG_OF_SPL_REMOVE_PROPS="pinctrl-0 pinctrl-names clock-names
interrupt-parent assigned-clocks assigned-clock-rates assigned>
CONFIG_ENV_IS_IN_MMC=y
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_ROCKCHIP_GPIO=y
CONFIG_SYS_I2C_ROCKCHIP=y
CONFIG_MMC_DW=y
CONFIG_MMC_DW_ROCKCHIP=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_ROCKCHIP=y
CONFIG_PHY_REALTEK=y
CONFIG_DM_ETH=y

Mariuccio, [26 Aug 2025 22:24:17]
CONFIG_ETH_DESIGNWARE=y
CONFIG_GMAC_ROCKCHIP=y
CONFIG_PMIC_RK8XX=y
CONFIG_REGULATOR_PWM=y
CONFIG_REGULATOR_RK8XX=y
CONFIG_PWM_ROCKCHIP=y
CONFIG_RAM_RK3399_LPDDR4=y
CONFIG_BAUDRATE=1500000
CONFIG_DEBUG_UART_SHIFT=2
CONFIG_SYSRESET=y
CONFIG_USB=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_XHCI_DWC3=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_GENERIC=y
CONFIG_USB_HOST_ETHER=y
CONFIG_USB_ETHER_ASIX=y
CONFIG_USB_ETHER_ASIX88179=y
CONFIG_USB_ETHER_MCS7830=y
CONFIG_USB_ETHER_RTL8152=y
CONFIG_USB_ETHER_SMSC95XX=y
CONFIG_SPL_TINY_MEMSET=y
CONFIG_ERRNO_STR=y


Some help to understand what's missing / wrong ? thanks.

-- 
Mario.