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Flashing images on Qualcomm Snapdragon Ride SX 4.0

Obtaining images

To flash AutoSD onto the Ride 4 board, you need two images:

aboot.img
This is an Android boot image. It contains the automotive kernel, the initial RAM file system (initramfs), Device Tree Blob (DTB), and the kernel command line. The boot loader reads this image to start the kernel. You flash aboot.img to the boot_a partition, which is appointed for the Android boot image.
rootfs.simg
This is a sparse disk image. A sparse disk image grows in size, as required, to accommodate data without storing empty space. rootfs.simg contains the root file system partition. The file system organizes files installed from RPM packages and files generated for configuration purposes.

You can obtain these images by using the following methods:

  • Download the nightly images. The AutoSD CI pipeline builds these images each night.
  • Build the images. Use tools provided by AutoSD to build example images or customize your own images.

Downloading nightly images

Download and uncompress prebuilt nightly AutoSD aboot.img and rootfs.simg images for Ride 4.

  1. Identify the name of the latest nightly image and store the value in a variable called latest:

    $ latest=$(curl -s 'https://autosd.sig.centos.org/AutoSD-9/nightly/RideSX4/?C=M;O=D' | sed -ne \
's|^<img.*href="(auto-osbuild-ridesx4-autosd9-developer-regular[^@"]\+/\)".*|\1|p' | head -n1)

  2. Download the images from the Automotive SIG nightly builds repository:

    $ wget -np -R "index.html*" -nH --cut-dirs=3 --recursive \
"https://autosd.sig.centos.org/AutoSD-9/nightly/RideSX4/$latest"

    This command downloads a directory that contains the compressed image files.

  3. Uncompress the aboot.img.xz and rootfs.simg.xz files:

    xz -d "$latest/aboot.img.xz" "$latest/rootfs.simg.xz"

Next steps

Now that you have downloaded and uncompressed the image files, you can flash the images onto the Ride 4 board.

Building images

To build AutoSD images, use the automotive-image-builder tool, which is available in the automotive-image-builder repository. This repository contains a configuration file for Qualcomm Ride 4 that you can use to build images for your Ride 4 board.

Prerequisites

  • An AArch64 system with internet access

  1. Clone the automotive-image-builder repository:

    git clone --recurse-submodules https://gitlab.com/CentOS/automotive/sample-images

  2. Build the images:

    $ ./automotive-image-builder/automotive-image-builder --container build --distro autosd \
--mode package --target ridesx4 --export aboot.simg \
images/developer.mpp.yml autosd-ridesx4-developer-regular

    This command creates the autosd-ridesx4-developer-regular directory, which contains the aboot.img and rootfs.simg image files.

Next steps

Now that you have built the image files, you can flash the images onto the Ride 4 board.

Flashing images

Flash the AutoSD images onto the Ride 4 board.

For more information about how to install and run ES12 on Ride 4, see the Release Notes on the Qualcomm document viewer site.

Note

Qualcomm credentials are required to access the Qualcomm document viewer site. For more information, see Create a Qualcomm ID.

Prerequisites

  1. Connect a USB cable from your workstation to the USB0 port on the Ride 4.

  2. From the workstation, identify the System on Chip (SoC) device:

    R4SX_TTY="/dev/$(basename $(readlink /dev/serial/by-id/usb-FTDI_Qualcomm_AIR_8775_*-if01-port0))"

  3. From the workstation, use a TTY application to connect to the SoC device and log in as the root user.

    Note

    The workstation in this step must be connected to the SoC device through USB. The workstation must be configured to use fastboot.

  4. Reboot the SoC device and quickly press and hold the down arrow key until you see boot messages on the terminal window.

  5. From the workstation, verify that the SoC device is in a fastboot state:

    # fastboot devices
c2b86509    fastboot

    Note

    The command returns an ID that confirms device is ready to flash. In this example, the ID is c2b86509.

  6. Flash the boot_a and system_a partitions with the images:

    # fastboot flash boot_a aboot.img
# fastboot flash system_a rootfs.simg

  7. Continue to boot the SoC device:

    # fastboot continue

  8. Log in to the operating system (OS) using user ID root and password password.

Additional Resources:

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