Quick follow up on the problems I was having rebuilding the kernel on the 410c. It turns out I had run into an known issue with the current release (15.07) that has been identified and fixed, all I needed to do was include the correct patch and the build worked. Here are my ‘revised’ instructions on how to successfully rebuild the kernel on the 410c, you will not there is a cherry-pick command added after fetching the source and before compiling it.
Hardware
- 410c board and power supply.
- HDMI Display
- USB Mouse and Keyboard
- 8GB SDCard (for installing Linux)
- 8GB SDCard (for swap space to build)
410c Setup
Install Ubuntu. Follow the SDCard install instructions here (use the 8GB SDCard):
o http://linaro.co/96b-linuxuserguide
Set MAC address
o Start ->other -> bash
o cd /lib/firmware/wlan
o sudo vi macaddr0
Change mac adder to match sticker on board
<esc>:wq
o reboot
o Connect to access point
Check mac address matches sticker on board.
o Start ->other -> bash
o ifconfig
install a 8GB SDCard, partition it, and mount it.
o sudo gdisk /dev/mmcblk1p1
o Command (? for help): o
o This option deletes all partitions and creates a new protective MBR.
o Proceed? (Y/N): y
o #build a 8GB partition for swap
o Command (? for help): n
o Partition number (1-128, default 1):
o First sector (34-8388574, default = 2048) or {±}size{KMGTP}:
o Last sector (2048-8388574, default = 8388574) or {±}size{KMGTP}: 8G
o Current type is ‘Linux filesystem’
o Hex code or GUID (L to show codes, Enter = 8300): 8200
o Changed type of partition to ‘Linux swap’
o
o Command (? for help): w
o Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!!
o Do you want to proceed? (Y/N): y
o
Reboot and run the following commands
o sudo mkswp /dev/mmcblk1p1
edit /etc/fstab and add the following line
o sudo vi /etc/fstab
/dev/mmcblk1p1 none swap sw 0 0
<esc>:wq
Reboot and run the following commands
o free # ensure swap is mounted
Install dev tools and support programs
Login to linaro/linaro. Start -> Other -> bash
o sudo apt-get update
o sudo apt-get install linux-headers-$(uname -r) build-essential
o sudo apt-get install linux-headers-$(uname -r) –fix-missing build-essential
o sudo apt-get install git
o sudo apt-get install device-tree-compiler
fetch the kernel sources and rebuild them
o cd /usr/src
o sudo mkdir linux-4.0.0
o sudo chown linaro linux-4.0.0
o sudo chgrp linaro linux-4.0.0
o cd linux-4.0.0
o git clone -n working/qualcomm/kernel.git - Qualcomm Landing Team kernel
o cd kernel
o git checkout -b kernel-15.07 ubuntu-qcom-dragonboard410c-15.07
o git cherry-pick –n fb68837eb7fbd9e65f6b9ed40718caa2b00452f1
o export ARCH=arm64
o make defconfig distro.config
o make -j4 Image dtbs modules
o sudo make INSTALL_MOD_STRIP=1 modules_install
o sudo make install #<-- it would be nice if this worked, then we wouldn’t need to do the remaining steps.
use the ramdisk that you just built
o cp /boot/initrd.img-4.0.0 .
o #wget http://builds.96boards.org/snapshots/dragonboard410c/linaro/ubuntu/latest/initrd.img-*
build the boot img file and install it onto the boot partition
o git clone git://codeaurora.org/quic/kernel/skales
o skales/dtbTool -o dt.img -s 2048 arch/arm64/boot/dts/qcom/
o export cmdline=“root=/dev/disk/by-partlabel/rootfs rw rootwait console=ttyMSM0,115200n8”
o skales/mkbootimg --kernel arch/arm64/boot/Image
o --ramdisk initrd.img-4.0.0
o --output boot-db410c.img
o --dt dt.img
o --pagesize 2048
o --base 0x80000000
o --cmdline “$cmdline”
o sudo dd if=boot-db410c.img of=/dev/mmcblk0p8
o sync
o reboot
