U-Boot# mmc rescan; mmc dev; load mmc 0:1 0x108000000x90800000 u-boot.imx; sf probe; sleep 2; sf erase 0 0xc0000; sf write 0x108000000x90800000 0x400 a0000c0000

1. If your u-boot hasn't been finalized and still under development, it is recommended to shunt cross the test pin and boot directly from SD card first. Once your u-boot is fully tested and finalized, you can fuse your u-boot to SPI NOR flash.
2. When TEST# pin of SMARC-FiMX6 FiMX7 is not shunt crossed, it will always boot up from SPI NOR flash. U-boot will read the BOOT_SEL configuration and determine where it should load zImage and device tree blob. When TEST# is shunt crossed (pull low), it will always boot up from SD card.

#####HDMI######
#optargs="video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24,bpp=32 consoleblank=0"
#####LVDS#####
#optargs="video=mxcfb0:dev=ldb,if=RGB24,bpp=32 consoleblank=0 fbmem=24M vmalloc=400M"
#####Parallel LCD Setting#####
#optargs="video=mxcfb0:dev=lcd,CLAA-WVGA,if=RGB24,bpp=32 consoleblank=0 fbmem=24M vmalloc=400M"
#####Parallel LCD to CH7055A (VESA Timing Format) Setting #####
#optargs="video=mxcfb0:dev=lcd,768x576M@75,if=RGB24,bpp=32 consoleblank=0"
#optargs="video=mxcfb0:dev=lcd,1280x1024M@60,if=RGB24,bpp=32 consoleblank=0"
#optargs="video=mxcfb0:dev=lcd,640x480M@60,if=RGB24,bpp=32 consoleblank=0"

console=ttymxc2,115200
mmcdev=

0
mmcpart=1
image=zImage
loadaddr=

0x80800000
fdt_addr=

0x83000000
mmcroot=/dev/

mmcblk0p2 ro
mmcrootfstype=ext4

rootwait

fixrtc
netdev=eth0
ethact=FEC0
ipaddr=192.168.1.150
serverip=192.168.1.53
gatewayip=192.168.1.254
mmcargs=setenv

bootargs

console=${console}

root=${mmcroot}

rootfstype=${mmcrootfstype}

${optargs}
uenvcmd=run

loadzimage;

run

loadfdt;

run

mmcboot

$ sudo mkdir -p /media/boot/dtbs

$ sudo cp -v arch/arm/boot/dts/imx6qimx7d-smarcfimx6smarc.dtb arch/arm/boot/dts/imx6dlimx7s-smarcfimx6.dtb smarc /media/boot/dtbs

$ sudo tar xvfz imx6-ubuntu1604. imx7-ubuntu-16.04.2-armhf-2017-03-02.tar.gz -C /media/rootfs

1. After compiled u-boot, it will generated u-boot.imx (u-boot-dtb.imx if using and u-boot v2017.03) and u-boot-dtb.bin. The only difference is IVT header that will tell i.MX6 MX7 internal ROM where to load u-boot. If the firmware in SPI flash need to be update or empty. Users could pull the TEST# pin on carrier board to low. In this way, SMARC-FiMX6 FiMX7 will boot up to SD card first. The u-boot we need to use now will be u-boot-dtb.imx. Please rename it as u-boot.imx. The command to copy u-boot.imx to SD card now is:
   $ sudo dd if=u-boot.imx of=${DISK} bs=512 seek=2 
   In this case, user will only need to copy uEnv.txt, zImage and device tree blob to partition one of your boot device.  
2. MAC address is factory pre-installed at on board I2C EEPROM at offset 60 bytes. It starts with Embedian's vendor code 10:0D:32. u-boot will read it and pass this parameter to kernel.
3. If your rootfs is yocto built, the kernel modules will be included in the rootfs.

#####HDMI######
optargs="video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24,bpp=32 consoleblank=0"
#####LVDS#####
#optargs="video=mxcfb0:dev=ldb,if=RGB24,bpp=32 consoleblank=0 fbmem=24M vmalloc=400M"
#####Parallel LCD Setting#####
#optargs="video=mxcfb0:dev=lcd,CLAA-WVGA,if=RGB24,bpp=32 consoleblank=0 fbmem=24M vmalloc=400M"
#####Parallel LCD to CH7055A (VESA Timing Format) Setting #####
#optargs="video=mxcfb0:dev=lcd,768x576M@75,if=RGB24,bpp=32 consoleblank=0"
#optargs="video=mxcfb0:dev=lcd,1280x1024M@60,if=RGB24,bpp=32 consoleblank=0"
#optargs="video=mxcfb0:dev=lcd,640x480M@60,if=RGB24,bpp=32 consoleblank=0"

console=ttymxc2,115200
mmcdev=

1
mmcpart=1
image=zImage
loadaddr=

0x80800000
fdt_addr=

0x83000000
mmcroot=/dev/

mmcblk2p2 ro
mmcrootfstype=ext4

rootwait

fixrtc
netdev=eth0
ethact=FEC0
ipaddr=192.168.1.150
serverip=192.168.1.53
gatewayip=192.168.1.254
mmcargs=setenv

bootargs

console=${console}

root=${mmcroot}

rootfstype=${mmcrootfstype}

${optargs}
uenvcmd=run

loadzimage;

run

loadfdt;

run

mmcboot

$ pushd /media/rootfs

$ sudo tar cvfz ~/smarcfimx6smarcfimx7-emmc-rootfs.tar.gz .

$ sudo mv ~/smarcfimx6smarcfimx7-emmc-rootfs.tar.gz /media/rootfs/home/root

$ popd

$ sudo vim /media/rootfs/etc/udev/rules.d/70-persistent-net.rules

Delete all contents starting with "SUBSYSTEM=="

$ pushd /media/rootfs

$ sudo tar cvfz ~/smarcfimx6smarcfimx7-emmc-rootfs.tar.gz .

$ sudo mv ~/smarcfimx6smarcfimx7-emmc-rootfs.tar.gz /media/rootfs/home/root

$ popd

$ sudo mkdir -p /media/boot/dtbs

$ sudo cp imx6qpimx7d-smarc.dtb imx6qimx7s-smarc.dtb imx6dl-smarc.dtb /media/boot/dtbs

$ sudo tar -zxvf smarcfimx6smarcfimx7-emmc-rootfs.tar.gz -C /media/rootfs