Forum Post: RE: DM8107 UD DVR Kit boot and rootfs from SDCARD

I will post here the steps that I have used to make the boot work using SDCard, maybe can help someone. I have used only the files in pre_built folder.

First, the rootfs that comes with DVR SDK in folder pre_built is a jffs2 file (rfs_128_ud810x_dvr.jffs2). This file is for the NAND.

Let's convert it to a tar.gz file:

mknod /tmp/mtdblock0 b 31 0
modprobe mtdblock
modprobe mtdram total_size=65536 erase_size=256
modprobe jffs2
dd if=/pathtoimage/rfs_128_ud810x_dvr.jffs2 of=/tmp/mtdblock0
mkdir /media/jffs2
mount -t jffs2 /tmp/mtdblock0 /media/jffs2

Go inside the folder /media/jffs2

Give the commands:

tar -czf /DestionationFolder/rootfs.tar.gz *

Now put the files rootfs.tar.gz, MLO, u-boot_ud810x_dvr.bin and uImage_ud810x_dvr in a folder with the script mksd.sh (Please visit the site to view this file)

Run the script:

./mksd.sh /dev/SD_DEVICE_NAME MLO u-boot_ud810x_dvr.bin uImage_ud810x_dvr rootfs.tar.gz

The card probably will need be umounted before execute the script.

Put the SDCard on DVR kit and stop u-boot before Linux load.

Give the commands:

mmcinfo
fatload mmc 0:1 0x81000000 uImage_ud810x_dvr

setenv bootargs 'mem=128M console=ttyO0,115200n8 noinitrd root=/dev/mmcblk0p2 rw rootfs=ext3 ip=192.168.1.200 vram=20M notifyk.vpssm3_sva=0xBFFD0000 i2c_bus=3,400 ddr_mem=512M'

bootm 0x81000000

This will boot directly from SD card.


For a autonomous boot, the u-boot will need be recompiled with bootargs above hardcoded. Change the file:

ti8107_dvr.h (include/configs)

In this way isn't necessary to save the env variables to EEPROM or SDCard.