Variscite DART-6UL: U-boot integration succeeds with Yocto Sumo, but fails with Thud

General Discussions
,
22

I have tried building an image with your settings (except for MENDER_STORAGE_TOTAL_SIZE_MB, as my device is different). First, bitbake was complaining because it couldn’t find u-boot.imx. To overcome that, I applied your solution from this thread - a bbappend file to the u-boot recipe:

do_compile_append() {
    if [ -n "${UBOOT_CONFIG}" ]
    then
        unset i j
        for config in ${UBOOT_MACHINE}; do
            i=$(expr $i + 1);
            for type in ${UBOOT_CONFIG}; do
                j=$(expr $j + 1);
                if [ $j -eq $i ]
                then
                    dd if="${B}/${config}/SPL" of="${B}/${config}/u-boot-${type}.imx"
                    dd if="${B}/${config}/u-boot.img" of="${B}/${config}/u-boot-${type}.imx" obs=1K seek=68
                fi
            done
            unset  j
        done
        unset  i
    else
        dd if="${B}/SPL" of="${B}/u-boot.imx"
        dd if="${B}/u-boot.img" of="${B}/u-boot.imx" obs=1K seek=68
    fi

}

do_deploy_append () {
    if [ -n "${UBOOT_CONFIG}" ]
    then
        for config in ${UBOOT_MACHINE}; do
            i=$(expr $i + 1);
            for type in ${UBOOT_CONFIG}; do
                j=$(expr $j + 1);
                if [ $j -eq $i ]
                then
                    install -d ${DEPLOYDIR}
                    install -m 644 ${B}/${config}/u-boot-${type}.imx ${DEPLOYDIR}/u-boot-${type}-${PV}-${PR}.imx
                    cd ${DEPLOYDIR}
                    ln -sf u-boot-${type}-${PV}-${PR}.imx u-boot-${type}.imx
                    ln -sf u-boot-${type}-${PV}-${PR}.imx u-boot.imx
                fi
            done
            unset  j
        done
        unset  i
    else
        install -d ${DEPLOYDIR}
        install -m 644 ${B}/u-boot.imx ${DEPLOYDIR}/u-boot-${PV}-${PR}.imx
        cd ${DEPLOYDIR}
        rm -f u-boot*.imx
        ln -sf u-boot-${PV}-${PR}.imx u-boot.imx

   fi

}

After that, I could generate an image. Unfortunately, it still doesn’t boot, and gets stuck at the same point as in the previous case:

U-Boot SPL 2017.03-mx6ul+ga7869c2cde (Aug 17 2020 - 07:41:25)

Part number: VSM-6UL-706B
Assembly: AS1812142595
Date of production: 2019 Feb 18
DART-6UL configuration: eMMC WiFi
Trying to boot from MMC1
MMC Boot Device: mmc1 (eMMC)


U-Boot 2017.03-mx6ul+ga7869c2cde (Aug 17 2020 - 07:41:25 +0000)

CPU:   Freescale i.MX6ULL rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 48C
Reset cause: POR
Board: Variscite DART-6UL
I2C:   ready
DRAM:  512 MiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
*** Warning - bad CRC, using default environment

Display: VAR-WVGA-LCD (800x480)
Video: 800x480x24
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Error: could not access storage.
In:    serial
Out:   serial
Err:   serial
switch to partitions #0, OK
mmc1(part 0) is current device
eMMC:  7.3 GiB
Net:   got MAC0 address from fuse: f8:dc:7a:26:f6:9c
FEC0 [PRIME], usb_ether
Error: usb_ether address not set.

Normal Boot
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc1(part 0) is current device
switch to partitions #0, OK
mmc1(part 0) is current device