.. _aosp: #### AOSP #### This page contains information that tells how to get OP-TEE up and running on HiKey devices (see :ref:`hikey`, :ref:`hikey960`) together with AOSP. .. warning:: The build used to be based on the latest OP-TEE release and used to be updated every quarter together with the regular OP-TEE releases. However, the AOSP build hasn't been updated since July 2021 and is **no longer maintained**. .. note:: We **only** use and support this static/stable configuration. If you try using it with the latest available AOSP, there is a risk that both OP-TEE and other parts are not working as expected. Prerequisites ************* - You should already be able to build AOSP for Hikey according to the `official instructions`_. Note that the official build is **NOT** part of the OP-TEE build. It is a separate and non-related build used only to verify and make sure that your system has everything needed to build AOSP without any issues. - Distro should have necessary packages installed, and the repo tool should be installed. Note that AOSP is built with Java. Also make sure that the ``mtools`` package is installed, which is needed to make the hikey boot image. - In addition, you will need the pre-requisites necessary to build optee-os. After following the AOSP setup instructions, the following additional packages from main :ref:`prerequisites` page are needed. Please install them. Build instructions ****************** .. code-block:: bash $ git clone https://github.com/linaro-swg/optee_android_manifest [-b ] # release tags come in the form of X.Y.Z, e.g. 3.8.0 $ cd optee_android_manifest HiKey620 - LeMaker 8GB .. code-block:: bash $ ./sync-p.sh $ ./build-p.sh HiKey620 - CircuitCo 4GB .. code-block:: bash $ ./sync-p.sh $ ./build-p.sh -4g HiKey960 .. code-block:: bash $ ./sync-p-hikey960.sh $ ./build-p-hikey960.sh These steps **MUST** finish with **no errors**. For ``sync*.sh`` scripts, that means there must be no errors prior to the ``Sync done!`` console output. For ``build*.sh`` scripts, that means there must be a ``#### build completed successfully (MM:SS (mm:ss)) ####`` console output! If there are errors, then there is no point in trying to flash the device. .. warning:: - ``--force-sync`` is used which means you might **lose your work** so save often, save frequent, and save accordingly, especially before running ``sync-p.sh`` again! - **Attention!** Do **NOT** use ``git clean`` with ``-x`` or ``-X`` or ``-e`` option in ``optee_android_manifest/``, else risk **losing all files** in the directory!!! .. hint:: You can add the ``-squashfs`` option to ``build.sh`` option to make ``system.img`` size smaller, but this will make ``/system`` read-only, so you won't be able to push files to it. Currently, only version P is supported. Other existing files are for internal development purposes ONLY and **NOT SUPPORTED**! Flashing the image ****************** The instructions for flashing the image can be found in detail under ``device/linaro/hikey/installer/hikey{960}/README`` in the tree. 1. Set jumpers/switches ``1-2`` and ``3-4``, and unset ``5-6``. 2. Reset the board. After that, invoke: HiKey620 .. code-block:: bash $ cp -a out/target/product/hikey/*.img device/linaro/hikey/installer/hikey/ $ sudo ./device/linaro/hikey/installer/hikey/flash-all.sh /dev/ttyUSBn HiKey960 .. code-block:: bash $ cp -a out/target/product/hikey960/*.img device/linaro/hikey/installer/hikey960/ $ sudo ./device/linaro/hikey/installer/hikey960/flash-all.sh /dev/ttyUSBn where the ``/dev/ttyUSBn`` device is the one that appears after rebooting with the 3-4 jumper set. Note that the device only remains in this recovery mode for about 90 seconds. If you take too long to run the flash commands, it will need to be reset again. After flashing, unset the 3-4 jumper again to boot normally. Partial flashing **************** The last handful of lines in the ``flash-all.sh`` script flash various images. After modifying and rebuilding Android, it is only necessary to flash `boot`, `system`, `cache`, `vendor` and `userdata`. If you aren't modifying the kernel, `boot` is not necessary, either. Experimental prebuilts ********************** Available at http://snapshots.linaro.org/android under ``android-hikey*`` directories. Note that these images do not always work and are **NOT SUPPORTED** as well! Running xtest ************* Do NOT try to run ``tee-supplicant`` as it has already been started automatically as a service! Once booted to the command prompt, ``xtest`` can be run immediately from the console or an ``adb`` shell. For more details about running OP-TEE, please see :ref:`optee_test_run_xtest` at :ref:`optee_test`. Running VTS Gtest unit for Gatekeeper and Keymaster (Optional) ************************************************************** On the device after going into the command prompt, run: .. code-block:: bash $ su $ ./data/nativetest64/VtsHalGatekeeperV1_0TargetTest/VtsHalGatekeeperV1_0TargetTest $ ./data/nativetest64/VtsHalKeymasterV3_0TargetTest/VtsHalKeymasterV3_0TargetTest .. note:: These tests need to be run as root. Enable adb over USB ******************* Boot the device. On serial console: .. code-block:: bash $ su setprop sys.usb.configfs 1 $ stop adbd $ start adbd Known issues ************ - If you don't have a monitor or hdmi emulator (dummy plug) connected to the board, you'll see constant errors scrolling on the console. As a workaround, move ``android.hardware.graphics.composer@2.1-service.rc`` out of ``/vendor/etc/init``. Move it back in when working with a monitor again. - Adb over USB currently doesn't work on HiKey960. As a workaround, use adb over tcpip. See https://bugs.96boards.org/show_bug.cgi?id=502 for details on how to connect. There are still some limitations however. E.g. running ``adb shell`` or a second ``adb`` instance will break the current adb tcpip connection. This might be due to unstable WiFi (there are periodic error messages like ``wlcore: WARNING corrupted packet in RX: status: 0x1 len: 76``) or just incompleteness of the generic HiKey960 builds under P. .. _official instructions: https://source.android.com/source/devices.html