AM62A7-Q1: DFU EMMC ROOTFS SIZE

Hi Kim,

Please explain how did you create the rootfs image for eMMC?

Hi, Liu

$ cd <path-ti-psdk>/filesystem
$ dd if=/dev/null of=rootfs.ext4 bs=1M seek=6000
$ mkfs.ext4 -F rootfs.ext4
$ mkdir mnt_fs
$ sudo mount -t ext4 rootfs.ext4 mnt_fs
$ cd mnt_fs
$ sudo tar xvf ../tisdk-edgeai-image-am62axx-evm.tar.xz
$ cd ..
$ sudo umount mnt_fs

Using the above command, I created an ext4 file and performed dfu flash.

Hi Liu,

free space does not appear.

Hi, Liu

The script doesn't work, but I solved the problem with the resize2fs command.

thank you

Hi Kim,

I got this script from the SDK rootfs image. It may not directly fit in this use case.

Can you please explain how you used resize2fs command resolving the problem?

Hi Liu,

When executing parted, free space could not be found, so I modified the command to df

FREE_SPACE=`parted /dev/$BOOT_DEV unit '%' print free | grep 'Free Space' | tail -n1 | awk '{print $3}'`

if [[ ${FREE_SPACE%.*} -gt 0 ]]; then
    echo "$FREE_SPACE of /dev/$BOOT_DEV is free. Extending partition #2"
    echo ",+" | sfdisk -N 2 /dev/$BOOT_DEV --no-reread
    partprobe
    resize2fs /dev/$ROOT_PART
fi

AVAIL_SPACE=`df -h | tail -n 1 | awk '{print $5}' | sed -e s/%//g `

if [[ ${AVAIL_SPACE} -eq 0 ]]; then
    echo ",+" | sfdisk -N 2 /dev/mmcblk0 --no-reread > /dev/null 2>&1
    partprobe
    resize2fs /dev/$ROOT_PART > /dev/null 2>&1
fi

Regards,

Kim

Thanks for sharing your solution.