[[PageOutline]] = Ubuntu on Ventana= [[Image(trusty-ventana-lxde.png,400px)]] While Gateworks cannot fully support all Linux distros, it is relatively simple to overlay a Gateworks Ventana kernel onto any non-Gateworks third party Linux distro rootfs image. For a full list of Linux BSP's for Ventana see [wiki:ventana#bsp here] This page is dedicated details regarding running Ubuntu on an Gateworks Ventana Board. See also: * the Gateworks Ventana [wiki:ventana#third_party_linux third party linux] page for more details on how to use other linux distro on Ventana. * [wiki:/ubuntu Gateworks Ubuntu Page for general notes] [=#prebuilt] == Gateworks pre-built Ubuntu Disk Images == Gateworks provides some pre-built Ubuntu firmware images for the Ventana Family: ||= Name =||= Size =||= Features =||= Notes =|| || bionic-ventana 18.04 || ~1.2GB^^^1^^^ || console support - Gateworks 4.20 kernel/drivers || **Recommended** || || xenial-ventana 16.04 || ~1.2GB^^^1^^^ || console support - Gateworks 4.20 kernel/drivers || || || trusty-ventana 14.04 || ~210MB || console support - Gateworks 3.14 kernel/drivers || || || trusty-mm-ventana 14.04 || ~650MB^^^1^^^ || HW acclerated gstreamer/gstreamer-imx - Gateworks 3.14 kernel/drivers || || || trusty-x11-ventana 14.04 || ~1000MB^^^1^^^ || HW accelerated X11 support with LXDE - Gateworks 3.14 kernel/drivers || || 1. requires 2GB and larger storage For a full Board Support Package providing building a Linux distro from source, please see the OpenWrt, Yocto, or Android BSP from the [wiki:ventana#bsp Ventana BSP] page === Ubuntu 18.04 LTS (Bionic Beaver) console image (**Recommended**) === - *** Note ***: This is a mainline kernel that does not have Video Hardware Acceleration support for gstreamer and a few other Gateworks specific items. For more information, read [wiki:ventana#MainlineLinuxKernelsupport Gateworks Mainline Linux Support]. A pre-built console image created using the [#debootstrap debootstrap] method for [http://releases.ubuntu.com/18.04/ Ubuntu 18.04 (Bionic Beaver)] can be downloaded: * [http://dev.gateworks.com/ventana/images/bionic-ventana_large.ubi bionic-ventana_large.ubi] - UBI image for 1GB/2GB Flash boards - see [wiki:/linux/ubi#BasicMethod here] for info about flashing UBI images - sha256sum: af05263c4142f0c276b8f5944ab9eec3f1e9ccbd4a7ee275c6e03bdead370d96 * [http://dev.gateworks.com/ventana/images/bionic-ventana_normal.ubi bionic-ventana_normal.ubi] - UBI image for 2GB Flash boards with new NAND Chip (GW5104-F.1) - see [wiki:/linux/ubi#BasicMethod here] for info about flashing UBI images - sha256sum: fb9d847e7fefae1ee2f3547d5d28f278095a71665e742595e13b1b690d1fd941 * [http://dev.gateworks.com/ubuntu/bionic/bionic-armhf.tar.xz bionic-armhf.tar.xz] - tarball of rootfs you can use to image onto microSD / mSATA - see [wiki:linux/blockdev linux/blockdev] for instructions - sha256sum: c12d0758a3629d537a1aaeab5c4030ccbf912f99ad2db3c7f490e723dfa77217 Features: - Ubuntu 18.04.1 LTS (from debootstrap instructions) - Ubuntu Bionic kernel (Linux 4.20 based) with drivers/firmware - custom bootscript supporting NAND/UBI, MMC, SATA, USB boot devices and root filesystems - extra packages: openssh-server can-utils i2c-tools usbutils pciutils - eth0 dhcp - user root passwd root [[CollapsibleStart(Old Releases)]] Old Releases: * Ubuntu 16.04 LTS (Xenial Xerus) console image - Important Notes: - This is a mainline kernel that does not have Video Hardware Acceleration support for gstreamer and a few other Gateworks specific items. For more information, read [wiki:ventana#MainlineLinuxKernelsupport Gateworks Mainline Linux Support]. - This requires the latest Gateworks Bootloader - U-Boot v2017.05 (see http://dev.gateworks.com/ventana/images and http://trac.gateworks.com/wiki/ventana/bootloader#PreBuiltBootloader) - A pre-built console image created using the [#debootstrap debootstrap] method for [http://releases.ubuntu.com/16.04/ Ubuntu 16.04 (Xenial Xerus)] can be downloaded: * [http://dev.gateworks.com/ventana/images/xenial-ventana_large.ubi xenial-ventana_large.ubi] - UBI image for 1GB/2GB Flash boards - see [wiki:/linux/ubi#BasicMethod here] for info about flashing UBI images - sha256sum: 590b4bc6af10fd8ff07061e73479fc5511fbe718a8b20e16cc6d9051e3ae5151 * [http://dev.gateworks.com/ventana/images/xenial-ventana_large.ubi xenial-ventana_normal.ubi] - UBI image for 2GB Flash boards - see [wiki:/linux/ubi#BasicMethod here] for info about flashing UBI images - sha256sum: 8306ece4a237320e6d8c120dffc4a1393aa877eb78a548a54e52f556e619584f * [http://dev.gateworks.com/ubuntu/xenial/xenial-armhf.tar.gz xenial-armhf.tar.gz] - tarball of rootfs you can use to image onto microSD / mSATA - see [wiki:linux/blockdev linux/blockdev] fpr instructions - sha256sum: a03dede35c64a8e28a71279b262ae9092a29ca8fd7de0e09faba4c6cc1f1356b - Features: - Ubuntu 16.04 (from debootstrap instructions) - Ubuntu Xenial kernel (Linux 4.11 based) with drivers/firmware - custom bootscript supporting NAND/UBI, MMC, SATA, USB boot devices and root filesystems - extra packages: openssh-server can-utils i2c-tools usbutils pciutils - eth0 dhcp - user root passwd root * Ubuntu 14.04 LTS (Trusty Tahr) console image - Important Notes: - This is a mainline kernel that does not have Video Hardware Acceleration support for gstreamer and a few other Gateworks specific items. For more information, read [wiki:ventana#MainlineLinuxKernelsupport Gateworks Mainline Linux Support]. - This requires the latest Gateworks Bootloader - U-Boot v2017.05 (see http://dev.gateworks.com/ventana/images and http://trac.gateworks.com/wiki/ventana/bootloader#PreBuiltBootloader) - A pre-built console image created using the [#debootstrap debootstrap] method for [http://releases.ubuntu.com/14.04/ Ubuntu 14.04 (Trusty Tahr)] can be downloaded: * [http://dev.gateworks.com/ventana/images/trusty-ventana_large.ubi trusty-ventana_large.ubi] - UBI image for 1GB/2GB Flash boards (see wiki:/linux/ubi#BasicMethod for info about flashing UBI images) * [http://dev.gateworks.com/ventana/images/trusty-ventana_normal.ubi trusty-ventana_normal.ubi] - UBI image for 256MB Flash boards (see wiki:/linux/ubi#BasicMethod for info about flashing UBI images) * [http://dev.gateworks.com/ubuntu/trusty/trusty-ventana.tar.gz trusty-ventana.tar.gz] - tarball of rootfs you can use to image onto microSD / mSATA using instructions from [wiki:linux/blockdev linux/blockdev] - Features: - Ubuntu 14.04 (from debootstrap instructions) - Gateworks 3.14 kernel with modules - ventana bootscript - extra packages: openssh-server can-utils i2c-tools usbutils pciutils - eth0 dhcp - user root passwd root * Ubuntu 14.04 LTS (Trusty Tahr) multimedia image - A pre-built console image created using the [#debootstrap debootstrap] method for [http://releases.ubuntu.com/14.04/ Ubuntu 14.04 (Trusty Tahr)] and adding gstreamer-imx for IPU/VPU/GPU hw video acceleration can be downloaded: * [http://blog.gateworks.com/?wpdmpro=trusty-armhf-ventana_20160112_large.ubi trusty-armhf-ventana_20160112_large.ubi] - UBI image for 1GB/2GB Flash boards (see wiki:/linux/ubi#BasicMethod for info about flashing UBI images) * [http://blog.gateworks.com/?wpdmpro=trusty-armhf-ventana_20160112.tar.gz trusty-armhf-ventana_20160112.tar.gz] - tarball of rootfs you can use to image onto microSD / mSATA using instructions from [wiki:linux/blockdev linux/blockdev] - Features: - Ubuntu 14.04 (from debootstrap instructions) - Gateworks 3.14 kernel with modules - ventana bootscript - extra packages: openssh-server can-utils i2c-tools usbutils pciutils - eth0 dhcp - user root passwd root - gstreamer (gstreamer1.0-x gstreamer1.0-tools gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-alsa) - fsl vpu firmware - fsl lib-vpu - fsl codec library - fsl libg2d - dev tools (build-essential autoconf libtool wget python pkg-config git) - python - gstreamer/gstreamer-imx/libimxvpuapi - v4l-utils - For details on Gstreamer and Gstreamer-imx see our [wiki:Yocto/gstreamer page] * Ubuntu 14.04 LTS (Trusty Tahr) X11 LXDE image - A pre-built console image created using the [#debootstrap debootstrap] method for [http://releases.ubuntu.com/14.04/ Ubuntu 14.04 (Trusty Tahr)] and adding gstreamer-imx for IPU/VPU/GPU hw video acceleration as well as X11/LXDE with hardware acceleration can be downloaded: * [http://blog.gateworks.com/?wpdmpro=trusty-x11-ventana_large-ubi] - UBI image for 1GB/2GB Flash boards (see wiki:/linux/ubi#BasicMethod for info about flashing UBI images) (sha256sum:fc795f2ec1e302ec5ee746ec4435f090c32584187a875c02582e4dfac5fd1397) * [http://blog.gateworks.com/?wpdmpro=trusty-x11 trusty-x11-ventana.tar.gz] - tarball of rootfs you can use to image onto microSD / mSATA / USB using instructions from [wiki:linux/blockdev linux/blockdev] (sha256sum:29166d5ebe6fc73c081b171f4f5ad15440b7d9a94c46c1d0111b47ea2fbd0c29) - Features: - ubuntu 14.04 (from debootstrap instructions) - Gateworks 3.14 kernel with modules - ventana bootscript - extra packages: openssh-server can-utils i2c-tools usbutils pciutils - eth0 dhcp - user root passwd root - gstreamer (gstreamer1.0-x gstreamer1.0-tools gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-alsa) - fsl vpu firmware - fsl lib-vpu - fsl codec library - fsl libg2d - dev tools (build-essential autoconf libtool wget python pkg-config git) - python - gstreamer/gstreamer-imx/libimxvpuapi - v4l-utils - lxde [[CollapsibleEnd]] [=#rootfs] == Root filesystem Sources There are several sources of pre-built root filesystems that are compatible with Ventana. As Ventana uses an i.MX6 SoC, you need to use something that is compatible with an ARMv7 instruction set. Many pre-built distributions will reference 'armhf' which means 'ARM hard-float' which is appropriate for the i.MX6 as it has hardware floating-point. Sources: * [#debootstrap build your own via debootstrap] '''(recommended)''' * [#linaro Linaro] - Linaro has several root filesystems including server, nano, developer, core, and ALIP. Each root filesystem will have different things installed for different purposes. Choose carefully which will work for you. [=#linaro] === Linaro The [https://releases.linaro.org/ Linaro] Developer Platform Team also creates Ubuntu flavored images. Linaro is a non profit org that manages engineers who work on improving the state of ARM open source software. They provide 4 different types of rootfs to choose from: * '''Nano''' - minimum rootfs containing console support and apt package management * '''Developer''' - minimum rootfs containing console support and apt package management and development tools (toolchain, debuggers, profiling, etc) * '''ALIP''' - a small distribution created using upstream Ubuntu packages containing LXDE (Lubuntu) with lightdm, X11 and chromium as the default graphics applications but still with an emphasis on small size * '''Ubuntu Desktop''' - basically a stock Ubuntu Desktop environment with a few extra packages which should bring the same environment you would find with Unity, Firefox, etc. These rootfs images can be found [https://releases.linaro.org here] within directories based on a year and a month. These directories are not to be confused with Ubuntu versions (also based on a year and a month). '''Note that not all the above rootfs images are available for every monthly build.''' For example, you can find the Linaro built Ubuntu 14.04 (trusty) rootfs images at https://releases.linaro.org/14.07/ubuntu/trusty-images References: * [https://wiki.linaro.org/Platform/DevPlatform/Rootfs Linaro Rootfs Wiki] * https://releases.linaro.org/ Notes: * You can use apt-get to install additional packages [=#debootstrap] === Build your own Ubuntu rootfs via debootstrap The preferred way to create a Ubuntu root filesystem is to use the {{{deboostrap}}} utility on a Debian or Ubuntu host. This tool provides a 2-stage install where the second stage is within a chroot environment using qemu-arm. Requirements: - Linux Ubuntu or Debian System with network connection and sudo permissions - Linux Kernel (ie Gateworks latest pre-built 3.14 kernel with full hardware support, Ubuntu pre-built kernel (missing full video in/out support but more up-to-date), or a vanilla mainline kernel (still missing full video in/out support but even more up-to-date), or a kernel of your own) - see below steps for more detail - Ventana target board with bootloader - boot device with 2GB+ of free space (micro-SD, USB mass storage, mSATA, 1GB/2GB NAND flash) Important notes: * we set and use '''target''' and '''distro''' env variables in step 2 and use those env variables in the remaining steps to make this tutorial more version-agnostic. Please be aware of this and do not deviate from the steps unless or until you completely understand what you are doing. Steps: 1. Install pre-requisites: {{{ #!bash sudo apt-get install qemu-user-static debootstrap binfmt-support }}} 2. Perform first stage install of minimal filesystem: {{{ #!bash target=rootfs distro=xenial sudo debootstrap --arch=armhf --foreign $distro $target # copy qemu-arm-static binary for the binfmt packages to find it and copy in resolv.conf from host sudo cp /usr/bin/qemu-arm-static $target/usr/bin }}} * See http://ports.ubuntu.com/ubuntu-ports/dists/ and https://wiki.ubuntu.com/Releases for a list of Ubuntu releases. For example: 18.04=bionic (latest LTS), 16.04=xenial, 14.04=trusty * this minimal rootfs is still missing some core packages and configuration before it can be booted. These steps are taken care of in a 2nd stage install within a chroot shell * the chroot shell below will provide network support (inherited from the host) 3. we now have a minimal Ubuntu rootfs - chroot to it and perform the 2nd stage install: {{{ #!bash sudo chroot $target # now we are in the chroot distro=xenial export LANG=C # setup second stage /debootstrap/debootstrap --second-stage }}} * this is the most minimal rootfs we would recommend 4. (optional) add additional apt package repos: {{{ #!bash cat < /etc/apt/sources.list deb http://ports.ubuntu.com/ubuntu-ports $distro main restricted universe multiverse deb http://ports.ubuntu.com/ubuntu-ports $distro-updates main restricted universe multiverse deb http://ports.ubuntu.com/ubuntu-ports $distro-security main restricted universe multiverse EOT }}} * you may want to customize the above list, depending on your needs. See [#packages below] for more detail on Ubuntu package feeds 5. (optional) update package database and setup locales (do not skip this step if you are needing to install any packages for the steps below or otherwise) {{{ #!bash apt-get update apt-get -f install # fixup missing package dependencies apt-get install locales dialog dpkg-reconfigure locales }}} 6. set hostname: {{{ #!bash echo ${distro}-armhf > /etc/hostname }}} 7. create a default fstab: {{{ #!bash cat < /etc/fstab /dev/root / auto defaults 1 1 EOT }}} * Note that this not required if you pass in 'rw' on the kernel cmdline. However while that is the default for the Ventana bootscripts for removeable storage it is not for NAND boot, therefore we will add a default fstab that will re-mount the kernel mounted rootfs as read-write * /dev/root in /etc/fstab will refer to the rootfs mounted by the kernel, thus the above entry simply re-mounts rootfs as read-write 8. set a root passwd so you can login {{{ #!bash passwd }}} - or consider adding a user via {{{adduser}}}: {{{ #!bash adduser myuser usermod -a -G tty myuser # add to tty group for tty access usermod -a -G dialout myuser # add to dialout group for UART access usermod -a -G sudo myuser # add to sudo group for root access }}} 9. (optional) configure networking: - wired ethernet with DHCP on eth0 {{{#!bash apt-get install net-tools ifupdown cat <> /etc/network/interfaces allow-hotplug eth0 auto eth0 iface eth0 inet dhcp EOF }}} - or static IP: {{{#!bash apt-get install net-tools ifupdown cat <> /etc/network/interfaces allow-hotplug eth0 auto eth0 iface eth0 inet static address 192.168.1.1 netmask 255.255.255.0 gateway 192.168.1.254 EOF }}} - or wireless (requires ~3MB of additional packages): {{{ #!bash apt-get install wpasupplicant iw cat << EOF >> /etc/network/interfaces # Wireless interface auto wlan0 iface wlan0 inet dhcp wireless_mode managed wireless_essid any wpa-driver nl80211 wpa-conf /etc/wpa_supplicant.conf EOF wpa_passphrase >> /etc/wpa_supplicant.conf }}} 10. (optional) install some useful packages {{{ #!bash apt-get install openssh-server # ssh server for remote access apt-get install can-utils i2c-tools usbutils pciutils # cmdline tools for various Ventana hardware support }}} * Note that by default root ssh access is disabled for security. See [#ssh below] for info on enabling it 11. install a kernel and kernel support (kernel+dtbs+modules+firmware+initrd). You have several options here (see [#kernels above] for more details). Gateworks recomends using a Gateworks pre-built kernel: a. **(recommended)** Gateworks Pre-built kernel (includes the same kernel drivers typically found on Ubuntu kernels including video capture/display and is built by Gateworks): {{{ #!bash cd / wget http://dev.gateworks.com/ventana/images/gateworks-linux-imx6-4.20.7.tar.xz tar -xvf gateworks-linux-imx6-4.20.7.tar.xz depmod $(ls /lib/modules/) # create module dependencies rm gateworks-linux-imx6-4.20.7.tar.xz }}} * the {{{depmod}}} trick above is to run depmod with the exact kernel version (which will be the subdir in /lib/modules). An alternative is to run {{{depmod}}} after the first boot * this kernel is recommended over the Ubuntu built kernel because it a) enables some drivers/features that Ubuntu leaves out, such as video capture b) may have patches for features that are not yet in mainline linux c) enables everything needed to boot from a Gateworks board static so that you do not need an initrd. a. Build your own kernel and install it as above with proper bootscript - see [wiki:linux/kernel#building] for more info (you can do this on a development host with a cross-toolchain or even even install development tools via the '''build-essential''' meta-package and build and install sources such as the kernel below (adds appx 180MB)) a. Ubuntu Pre-built kernel (includes the most kernel drivers and is built by and supported by Ubuntu): {{{#!bash # disable flash-kernel as its not needed and will otherwise error out echo "FLASH_KERNEL_SKIP=1" >> /etc/environment export FLASH_KERNEL_SKIP=1 # and export it for current operations # install kernel/firmware/headers apt-get install linux-generic # install mkimage apt-get install u-boot-tools # create u-boot image for kernel mkimage -A arm -O linux -T kernel -C none \ -a 0x10008000 -e 0x10008000 -n "linux" \ -d /boot/vmlinuz-*-generic /boot/uImage # install device-tree blobs cp /lib/firmware/*-generic/device-tree/imx6*-gw*.dtb /boot #blacklist imx rtc driver, Gateworks board uses GSC RTC, and does not use imx RTC echo "blacklist rtc_snvs" > /etc/modprobe.d/blacklist-rtc.conf }}} a. Gateworks pre-built downstream vendor kernel: 3.14 kernel supporting full video input (which is not currently in upstream Linux) - ** use this if you are going to be using video input ** {{{ #!bash cd / wget http://dev.gateworks.com/ventana/images/gateworks-linux-imx6-3.14.48.tar.gz tar -xvf gateworks-linux-imx6-3.14.48.tar.gz depmod $(ls /lib/modules/) # create module dependencies rm gateworks-linux-imx6-3.14.48.tar.gz }}} * the {{{depmod}}} trick above is to run depmod with the exact kernel version (which will be the subdir in /lib/modules). An alternative is to run {{{depmod}}} after the first boot a. Build your own kernel and install it as above with proper bootscript - see [wiki:linux/kernel#building] for more info (you can do this on a development host with a cross-toolchain or even even install development tools via the '''build-essential''' meta-package and build and install sources such as the kernel below (adds appx 180MB)) 12. exit the chroot shell and remove files we no longer need {{{ #!bash exit sudo rm $target/usr/bin/qemu-arm-static }}} * ''You may wish to move this file else place for later use should you wish to chroot again.'' 13. install to bootable media: * For a removable block storage device supported by your board such as a USB Mass Storage device, a microSD, an mSATA SSD the example below will create a single ext4 rootfs partition on a removable block storage device. Ensure you set DEVICE properly for your system. We use the 'udisks' application for mount/unmount so that the mount-point is obvious - if you know what your doing you could use standard mount/unmount as well: {{{ #!bash DEVICE=/dev/sdc # unmount all auto-mounted partitions for this device sudo umount ${DEVICE}? # partition disk - single ext partition printf ",,L,,\n" | sudo sfdisk -uS ${DEVICE} sync sudo mkfs.ext4 -O ^64bit -L rootfs ${DEVICE}1 # mount partition (will mount to /media/rootfs/) sudo udisks --mount ${DEVICE}1 # copy the root filesystem sudo cp -rupv $target/* /media/rootfs/ # unmount the disk sudo udisks --unmount ${DEVICE}1 }}} * To create a ubifs suitable for 1GB/2GB NAND flash (large layout) use the following: {{{ #!bash mkfs.ubifs -d $target -F -m 4096 -e 248KiB -c 8124 -x zlib -o ${distro}_large.ubifs }}} * For details on how to flash this onto NAND see [wiki:linux/ubi#uboot-ubifs] ==== version-specific notes ===== trusty (14.04) LTS An extra step is needed for serial console configuration: {{{ #!bash cat << EOT >> /etc/init/serial.conf start on stopped rc RUNLEVEL=[2345] stop on runlevel [!2345] respawn exec /sbin/getty 115200 ttymxc1 EOT }}} [=#kernel] == Kernel While a kernel is not specifically part of a root filesystem it usually resides on the root filesystem. There are several kernel sources you can choose from: * Gateworks pre-built 4.20 kernel (**recommended**) * Gateworks pre-built 3.14 kernel * Ubuntu built kernel * Kernel built by hand === Gateworks build kernel Gateworks periodically updates their pre-built IMX6 kernel release and it is easy to install on a running system: {{{#!bash wget http://dev.gateworks.com/ventana/images/gateworks-linux-4.20.7.tar.xz tar -C / -xvf gateworks-linux-4.20.7.tar.xz rm gateworks-linux-4.20.7.tar.xz }}} If you want to clean out old kernels no longer used, you can remove the directory of modules in /lib/modules/ Benefits of using the Gateworks kernel: * contains all drivers 'static' required to boot off boot devices supported by Gateworks boards (ie NAND, SATA, MMC, USB Mass storage all static in kernel) removing requirement for an 'inital ramdisk' (initrd) that Ubuntu Built kernels require * contains kernel patches that may not be in mainline yet * tested and supported by Gateworks === Ubuntu built kernel Ubuntu releases are based on a specific major kernel version. However over time the Ubuntu team releases new major kernel version updates for specific distro versions. An {{{apt-get install linux-image}}} will not change the kernel major version and you have to specifically install a new major version to switch to it. It is recommended that you use the Gateworks kernel above for the following reasons: * Ubuntu built kernels can require initrd for some boot devices complicating things (ie NAND and USB Mass Storage are kernel modules) * Ubuntu built kernels may be configured in ways not appropriate for Gateworks boards (ie the DS1672 RTC driver is not static which complicates restoring system time on boot from the GSC provided RTC) If you wish to use an Ubuntu built kernel here are some notes but Gateworks can not support you if you run into issues as we don't maintain this kernel. To install a specific kernel image search for available packages and pick the version you want. For example if wanting the 4-15.0-34-generic kernel: {{{#!bash apt-get update apt-get install linux-image-4.15.0-34-generic # install mkimage apt-get install u-boot-tools # create u-boot image for kernel mkimage -A arm -O linux -T kernel -C none \ -a 0x10008000 -e 0x10008000 -n "linux" \ -d /boot/vmlinuz-4.15.0-34-generic /boot/uImage # install device-tree blobs cp /lib/firmware/4.15.0-34-generic/device-tree/imx6*-gw*.dtb /boot #blacklist imx rtc driver, Gateworks board uses GSC RTC, and does not use imx RTC echo "blacklist rtc_snvs" > /etc/modprobe.d/blacklist-rtc.conf # create u-boot image for initrd mkimage -A arm -O linux -T ramdisk \ -a 0x0 -e 0x0 -n "initrd" \ -d /boot/initrd.img-4.15.0-34-generic /boot/uramdisk }}} - use {{{apt-get search linux-image}}} to determine what Ubuntu kernel versions are available If you want to clean out old kernels no longer used you can use {{{apt list --instealled | grep linux}} to list installed packages and remove them (remove linux-headers, linux-image, linux-modules for example). For example if you want to remove the 4.15.0-42-generic packages: {{{#!bash apt purge linux-image-4.15.0-42-generic linux-modules-4.15.0-42-generic linux-headers-4.15.0-42 }}} - modify the above to remove the specific version(s) you want to remove If booting from boot media that requires kernel modules you need to create an initrd: * The default Ubuntu kernel supports booting a microSD/SATA rootfs directly, but lacks nand/ubifs/ubi/usb-storage support. If you need that (and have a large enough flash to boot from that) you will need to use the Ubuntu initrd: - add NAND/ubifs/usb-storage modules to the initrd: {{{#!bash cat << EOF >> /etc/initramfs-tools/modules # for NAND/ubi gpmi_nand ubi mtd=2 ubifs # for usb-storage ci_hdrc_imx usb-storage EOF update-initramfs -u # press 'Enter' when prompted # create u-boot image for initrd mkimage -A arm -O linux -T ramdisk \ -a 0x0 -e 0x0 -n "initrd" \ -d /boot/initrd.img-*-generic /boot/uramdisk }}} You will need to create a boot script that sets kernel cmdline properly based on boot device and loads the Ubuntu initrd if needed. You can do this on the target board: {{{#!bash # The Gateworks bootscript is a good starting point wget https://raw.githubusercontent.com/Gateworks/linux-imx6/gateworks_4.20.7/gwventana_bootscript -O /boot/6x_bootscript-ventana.txt # re-enable ramdisk when its needed sed -i 's/^setenv rd_addr$/#setenv rd_addr/' /boot/6x_bootscript-ventana.txt mkimage -A arm -O linux -T script -n bootscript -d /boot/6x_bootscript-ventana.txt /boot/6x_bootscript-ventana }}} [=#gstreamer-imx] == Adding GStreamer IPU/VPU/GPU support via gstreamer-imx (**Trusty**) **Note: This section pertains only to the Gateworks downstream vendor 3.14 kernel with proprietary Freescale Drivers (Trusty Prebuilt image)** If using the Gateworks downstream vendor 3.14 kernel with proprietary Freescale drivers you can easily add IMX6 IPU, VPU, and GPU support via GStreamer and Gstreamer-imx plugins. Many of the pieces needed (firmware and source-code) are from Freescale and not freely redistributable thus must be downloaded from their mirror and extracted from a shell script that forces you to read and agree to their End User License Agreement (EULA). This support requires that you are using the Gateworks downstream vendor kernel as it has the necessary driver support that is not in the mainline Linux kernel. '''This procedure has not been proven on versions newer than Trusty. ''' There are several pre-requisites you will need to install and/or build using the instructions below: - Gateworks downstream vendor kernel (containing non-upstreamed IPU/VPU/GPU drivers) with kernel headers. See [wiki:linux/kernel here] for instructions on building, or [http://dev.gateworks.com/ventana/images/gateworks-linux-imx6-3.14.48.tar.gz here] for a pre-built kernel tarball - gstreamer and libs - firmware-imx-3.14.28-1.0.0.bin - Freescale VPU firmware (EULA required) - imx-vpu-5.4.31.bin - Freescale lib_vpu (EULA required) - this is the low-level documented API that works with the (undocumented) VPU kernel driver API. You can think of this as a kernel driver in userspace - libfslcodec-4.0.3.bin - Freescale Codec Library (EULA required) - imx-gpu-viv-5.0.11.p4.5-hfp.bin - Freescale libg2d (EULA required) - this is the low-level documented API that works with the (undocumented) Vivante Galcore GPU kernel driver API. You can think of this as a kernel driver in userspace - libimxvpuapi - community based open-source high-level library over the low-level imx-vpu API - gstreamer-imx - community based open-source GStreamer plugins to utilize hardware accellerated capture, display, transforms, compositing, decode, encode capabilities of the IMX6. The following instructions can be used on top of the [#debootstrap debootstrap created rootfs] but should work on other sources of Ubuntu or other Linux distributions root filesystems as well. 1. install build deps (~165MB): {{{ #!bash apt-get install build-essential autoconf libtool wget python pkg-config git }}} 2. install gstreamer1.x (~200MB): {{{ #!bash apt-get install gstreamer1.0-x gstreamer1.0-tools # install videoparserbad for video parsers like h264parse, mpegvideoparse and mpeg4videoparse apt-get install gstreamer1.0-plugins-good gstreamer1.0-plugins-bad # install alsa plugin apt-get install gstreamer1.0-alsa }}} * note that the gstreamer1.0-plugins-bad meta-package is in the multiverse package feed * at this point you could use 'gst-launch-1.0 videotestsrc ! fbdevsink' but it will not stretch to the display, and will not be hardware accelerated 3. install Freescale VPU firmware (firmware-imx) (EULA required) {{{ #!bash wget http://www.freescale.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-3.14.28-1.0.0.bin /bin/sh firmware-imx-*.bin # install firmware mkdir -p /lib/firmware/vpu cp firmware-imx-*/firmware/vpu/vpu_fw_imx6*.bin /lib/firmware/vpu }}} 4. build and install Freescale lib_vpu (EULA required) {{{ #!bash wget http://www.freescale.com/lgfiles/NMG/MAD/YOCTO/imx-vpu-5.4.31.bin /bin/sh imx-vpu-*.bin cd imx-vpu-* make PLATFORM=IMX6Q all make install # installs vpu_lib.h and vpu_io.h in /usr/include and libvpu.* in /usr/lib cd .. }}} 5. (optional) build and install Freescale Codec Library (libfslcodec) (EULA required) {{{ #!bash wget http://www.freescale.com/lgfiles/NMG/MAD/YOCTO/libfslcodec-4.0.3.bin /bin/sh libfslcodec-*.bin cd libfslcodec-* ./autogen.sh --prefix=/usr --enable-fhw --enable-vpu make all make install # move the libs where gstreamer plugins will find them mv /usr/lib/imx-mm/video-codec/* /usr/lib mv /usr/lib/imx-mm/audio-codec/* /usr/lib rm -rf /usr/lib/imx-mm/ cd .. }}} * this is optional and is needed if you want the audio codec support in gstreamer-imx * Note the Makefile will install the libs into $prefix/lib/imx-mm which is undesirable so we move them after 'make install' 6. (optional) install Freescale libg2d (EULA required) {{{ #!bash wget http://www.freescale.com/lgfiles/NMG/MAD/YOCTO/imx-gpu-viv-5.0.11.p4.5-hfp.bin /bin/sh imx-gpu-viv-*.bin cd imx-gpu-viv-* # install just the g2d headers/libs cp g2d/usr/include/* /usr/include/ cp -d g2d/usr/lib/* /usr/lib/ # install gpu-core headers/libs cp -d gpu-core/usr/lib/*.so* /usr/lib/ cp -Pr gpu-core/usr/include/* /usr/include/ # optional: install demos cp -r gpu-demos/opt / # optional: install gpu tools cp -axr gpu-tools/gmem-info/usr/bin/* /usr/bin/ cd .. }}} * this is part of the Freescale Vivante GPU driver and apps (imx-gpu-viv) package which provides libgl/libgles1/libgles2/wayland-egl/libgal-x11/egl/libopenvg/libg2d * it comes in soft-float (sfp) and hard-float (hfp) - we want the hard-float as we are using an armhf rootfs * this is not required but needed for the gstreamer-imx g2d transform and sink plugins 7. build and install libimxvpuapi library: - This library provides a community based open-source API to the Freescale imx-vpu library (the low-level IMX6 VPU interface). It is a replacement for Freescale's closed-development libfslvapwrapper library. {{{ #!bash git clone git://github.com/Freescale/libimxvpuapi.git cd libimxvpuapi ./waf configure --prefix=/usr ./waf ./waf install cd .. }}} 8. build and install gstreamer-imx: {{{ #!bash apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-good1.0-dev # +70MB git clone git://github.com/Freescale/gstreamer-imx.git cd gstreamer-imx ln -s /usr/lib/arm-linux-gnueabihf/gstreamer-1.0/ /usr/lib/gstreamer-1.0 ./waf configure --prefix=/usr --kernel-headers=/include ./waf ./waf install cd .. }}} * note './waf install' installs artifacts to its prefix + /lib/gstreamer-1.0 but they need to be installed to /usr/lib/arm-linux-gnueabihf/gstreamer-1.0 which is why we created a symlink above before installing * note the uniaudio decoder codecs are from Freescale (found in the fsl-mm-codeclib package) and you do not need these unless you want to use FSL's audio codecs instead of the GStreamer ones * note g2d lib required to build G2D * note that linux kernel headers are required to build PxP and IPU * note that x11 library is required to build EGL sink with Vivante direct textures (only needed for X11 support) * note that libfslaudiocodec is required to build audio plugins * After this step you should be able to see several plugins with {{{gst-inspect-1.0}}}: {{{ #!bash # gst-inspect-1.0 | grep imx imxv4l2videosrc: imxv4l2videosrc: V4L2 CSI Video Source imxipu: imxipucompositor: Freescale IPU video compositor imxipu: imxipuvideosink: Freescale IPU video sink imxipu: imxipuvideotransform: Freescale IPU video transform imxpxp: imxpxpvideotransform: Freescale PxP video transform imxpxp: imxpxpvideosink: Freescale PxP video sink imxvpu: imxvpuenc_mjpeg: Freescale VPU motion JPEG video encoder imxvpu: imxvpuenc_mpeg4: Freescale VPU MPEG-4 video encoder imxvpu: imxvpuenc_h264: Freescale VPU h.264 video encoder imxvpu: imxvpuenc_h263: Freescale VPU h.263 video encoder imxvpu: imxvpudec: Freescale VPU video decoder imxg2d: imxg2dcompositor: Freescale G2D video compositor imxg2d: imxg2dvideotransform: Freescale G2D video transform imxg2d: imxg2dvideosink: Freescale G2D video sink }}} 9. install a U-Boot bootscript to setup kernel parameters for your display output: {{{ #!bash apt-get install u-boot-tools wget https://github.com/Freescale/meta-freescale-3rdparty/raw/master/recipes-bsp/u-boot/u-boot-script-gateworks-imx/6x_bootscript-yocto.txt mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "boot script" -d 6x_bootscript-yocto.txt /boot/6x_bootscript-ventana reboot # reboot to setup bootargs for display }}} * The Freescale IMX6 display drivers use kernel parameters to configure what display outputs to enable and in what format. What displays, resolutions, and formats affect how much contiguous memory is needed (CMA) as well. The Gateworks Yocto BSP has a bootscript that configures connected displays based on various rules and we will use this here. See http://trac.gateworks.com/wiki/Yocto/Video_Out#DisplaysDevices for more info Now you will be able to use Gstreamer and Gstreamer-imx to tap the full potential of the IMX IPU/VPU/GPU hardware. Examples: * show gstreamer-imx plugins: {{{ #!bash # gst-inspect-1.0 | grep imx imxvpu: imxvpuenc_mjpeg: Freescale VPU motion JPEG video encoder imxvpu: imxvpuenc_mpeg4: Freescale VPU MPEG-4 video encoder imxvpu: imxvpuenc_h264: Freescale VPU h.264 video encoder imxvpu: imxvpuenc_h263: Freescale VPU h.263 video encoder imxvpu: imxvpudec: Freescale VPU video decoder imxv4l2videosrc: imxv4l2videosrc: V4L2 CSI Video Source imxg2d: imxg2dcompositor: Freescale G2D video compositor imxg2d: imxg2dvideotransform: Freescale G2D video transform imxg2d: imxg2dvideosink: Freescale G2D video sink imxipu: imxipucompositor: Freescale IPU video compositor imxipu: imxipuvideosink: Freescale IPU video sink imxipu: imxipuvideotransform: Freescale IPU video transform imxpxp: imxpxpvideotransform: Freescale PxP video transform imxpxp: imxpxpvideosink: Freescale PxP video sink }}} * imxipuvideosink: {{{ #!bash gst-launch-1.0 videotestsrc ! imxipuvideosink }}} * imxg2dvideosink: {{{ #!bash gst-launch-1.0 videotestsrc ! imxg2dvideosink }}} See the [wiki:Yocto/gstreamer Gstreamer wiki page] for more details.