Android automotive 9/10 with dual display support

[user0x11]

Hi,
I am currently working on a POC with below requirements,

OS

• Android 9/10 automotive ( with buildable source code )

Hardware

• Dual display running parallel (one for Android UI another for cluster instrument )

• LTE 4g connectivity

• CAN bus interface to gather sensor data over CAN.

So can anyone help me to provide details that Dragonboard 845C can help to achieve them ?

Thanks

[user0x11]

Hi,
Can anyone help me in here ?

Thanks

[robertfoss]

Hi @user0x11,

We’re not able to supply you with a guide for implementing this, but we can help you with specific issues.

As for you getting started I would start with:

• Build Android automotive
• Build the latest kernel release
  • Use the latest upstream kernel release
  • Use this kconfig .config file http://releases.linaro.org/96boards/dragonboard845c/linaro/debian/latest/config-5.10.0-qcomlt-arm64
  • Merge .config with android recommended kconfig options
    • scripts/kconfig/merge_config.sh <...>/device_defconfig <...>/android-base.cfg <...>/android-base-ARCH.cfg <...>/android-recommended.cfg
  • Use a build image script like this one: build_db845c.sh
• Flash android build
• Flash kernel boot.img

[user0x11]

Hi @robertfoss ,

Thank you for your quick response.

At lest can i know that weather dual display is supported parallel and CAN bus and LTE interface are available for android automotive 9/10?

Thanks

[robertfoss]

You’ll find the this information in the hardware documentation:

rb3-hardware-user-manual.PDF

But to answer your questions;

• 2x DSI output is supported
• CAN bus is supported
• The db845c/rb3 has no integrated modem, but the ‘Machine Communication Mezzanine’ board does
  • https://www.thundercomm.com/app_en/product/1548923718772791
  • Currently no upstream linux support exists for this mezzanine

[user0x11]

Thanks a lot for proper guidance,
One last query, we can build automotive for DB845c, so can we modify AOSP related changes for DB845 ?

Thanks

[robertfoss]

Update: I looked into the 96boards AOSP repo, and there does seem to exist db845c support.

I don’t think I understand your question. But you can make any changes you like to the AOSP repos.

Building Android Open Source Project (AOSP) for Dragonboard

[user0x11]

Hi,

I have cloned the code but not able to find car combo in lunch menu.
But i figure out this link How can I bring up Dragonboard 845c with Android Automotive 11 - #3 by xian.lv
Will this wok in bringup android automotive in 845C ?
is it stable car build for 845C ?

Thanks

[robertfoss]

I’m not at all familiar with the automotive versions of AOSP, but the URL you pasted seems to contain the android-device you need for db845c_car-userdebug.

[user0x11]

Hi @robertfoss,

So can we get any help on that ?

Thanks

[robertfoss]

If you find issues or bugs then yes, but we can’t build the platform for you. Android Automotive is not explicitly supported.