docs/devices/rb3.rst - website - Gitiles

 ..
  # Copyright (c) 2023, Linaro Ltd.
  #
  # SPDX-License-Identifier: MIT

 RB3
 ===

 RB3 is one of the supported dev-boards listed on
 `source.android.com <https://source.android.com/docs/setup/create/devices>`_.

 The vendor-packages required to build RB3 images with AOSP are
 listed `here <http://releases.devboardsforandroid.linaro.org/vendor-packages>`_.


 Getting started with RB3 (also known as DB845c)
 -----------------------------------------------

 Learn about your RB3 board as well as how to prepare and set up for basic
 use from the
 `96boards DB845c getting started page <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/getting-started/rb3-kit/>`_.

 Make sure you are running AOSP (ptable compatible) bootloader on DB845c. Latest
 bootloader binaries (build #97 and above) are `hosted here
 <http://snapshots.linaro.org/96boards/dragonboard845c/linaro/rescue/>`_.

 For flashing instructions checkout
 `96boards DB845c recovery page <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/installation/board-recovery.md.html>`_.

 .. note::
    You can also update bootloader binaries by running **flashall** script, which is
    a part of the vendor package of the RB3 AOSP build target. Boot in fastboot mode
    and run following command from your HOST machine:

 .. code::

    git clone https://gerrit.devboardsforandroid.linaro.org/linaro-vendor-package
    cd src/db845c/dragonboard-845c-bootloader-ufs-aosp/
    ./flashall


 Install pre-built AOSP images on RB3
 ------------------------------------

 Linaro create daily AOSP builds for DB845c that user can download, flash and
 boot from. If you are interested in prebuilt AOSP images for DB845c and want to
 avoid compiling your own, please download and flash boot.img, vendor_boot.img,
 super.img and userdata.img from
 `the snapshot here <http://snapshots.linaro.org/96boards/dragonboard845c/linaro/aosp-master>`_.

 Flash downloaded AOSP images by running following commands, while booted
 in fastboot mode::

    fastboot flash userdata userdata.img
    fastboot flash super super.img
    fastboot flash vendor_boot vendor_boot.img
    fastboot flash boot boot.img


 Compile AOSP from sources for RB3
 ---------------------------------

 #. Download the AOSP source tree and build db845c-trunk_staging-userdebug build target:

 ::

    repo init -u https://android.googlesource.com/platform/manifest -b master
    repo sync -j`nproc`
    ./device/linaro/dragonboard/fetch-vendor-package.sh
    source ./build/envsetup.sh
    lunch db845c-trunk_staging-userdebug
    make -j`nproc`


 #. Install:  `Boot DB845c into fastboot mode <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/installation/board-recovery.md.html#booting-into-fastboot>`_ and run following command:

 ::

    ./device/linaro/dragonboard/installer/db845c/flash-all-aosp.sh

 You can also perform QDL board recovery by running following script after
 booting DB845c in `USB flashing mode <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/installation/board-recovery.md.html#connecting-the-board-in-usb-flashing-mode-aka-edl-mode>`_:

 ::

    ./device/linaro/dragonboard/installer/db845c/recovery.sh


 Building the kernel for RB3
 ---------------------------

 The **Preferred** option is to build DB845c Android GKI kernel artifacts using
 official Bazel build. Run the following commands to clone the kernel source,
 prebuilt Android toolchains and build scripts.

 ::

    mkdir repo-db845c
    cd repo-db845c
    repo init -u https://android.googlesource.com/kernel/manifest -b common-android-mainline
    repo sync -j`nproc`
    tools/bazel clean
    tools/bazel run //common:db845c_dist

 Now delete all the objects in
 $(AOSP_TOPDIR)device/linaro/dragonboard-kernel/android-mainline/, then copy
 build artifacts from out/db845c/dist/ to
 $(AOSP_TOPDIR)/device/linaro/dragonboard-kernel/android-mainline/

 If you want to properly test the GKI kernel, you should

 * grab the latest kernel_aarch64 build from
   https://ci.android.com/builds/branches/aosp_kernel-common-android-mainline/grid?

 * under artifacts, download the Image.gz and copy it to
   $(AOSP_TOPDIR)/device/linaro/dragonboard-kernel/android-mainline/

 Then rebuild AOSP using:

 ::

    make TARGET_KERNEL_USE=mainline -j`nproc`'


 Booting AOSP from MMC Sdcard
 ----------------------------

 Booting AOSP on DB845c from a mmc sdcard is an experimental build configuration
 and is only intended to be used in the LKFT lab. Regular users should not enable
 this build flag and should flash and boot from the UFS instead.

 Booting from external sdcards will help prevent the internal emmc/ufs wear off
 in the long run and extend the lab-life of most of our devboards. To avoid
 flashing anything on internal UFS and boot solely from a sdcard, we are
 switching to chainloading U-Boot from ABL bootloader. For now we are using a WIP
 `upstream u-boot fork <https://source.devboardsforandroid.linaro.org/platform/external/u-boot/>`_.

 .. note::
    In the long run we plan to switch to AOSP/external/u-boot project to catch up
    with the Android bootloader features.

 Set ``TARGET_SDCARD_BOOT=true`` at build time to build and boot AOSP from a mmc
 sdcard. This device configuration need atleast 8GB sdcard to boot from. Here are
 the instructions to prepare and flash AOSP images on a MMC sdcard:

 .. note::
    Following commands that are listed with **=>** prompt means those commands need
    to be run from the u-boot prompt on the device and commands with **$** means
    they need to be run from the HOST machine.

 * Boot DB845c in the fastboot mode as mentioned above and erase the boot
   partition to make sure that every reboot/reset lands at the ABL fastboot mode
   prompt.

 ::

    $ fastboot erase boot

 * Build U-Boot for DB845c and boot with it:

 ::

    $ git clone https://source.devboardsforandroid.linaro.org/platform/external/u-boot
    $ cd u-boot
    $ source envsetup.sh
    $ mu qcom_defconfig
    $ budt dragonboard845c
    $ fastboot boot /tmp/u-boot.img   # this will boot U-Boot on DB845c

 * Prepare AOSP partition layout on the sdcard from the U-Boot prompt. Make sure
   that a 8GB+ MMC sdcard is plugged into the board:

 ::

    => run gpt_mmc_aosp
    => reset                          # this will reboot in ABL fastboot mode
    $ fastboot boot /tmp/u-boot.img
    => run fastboot                   # starting U-Boot's fastboot command
    $ fastboot erase boot erase init_boot erase vendor_boot erase modemst1 erase modemst2 erase fsg erase fsc erase misc erase metadata erase super erase userdata
    $ fastboot reboot                 # rebooting in ABL fastboot mode
    $ fastboot boot /tmp/u-boot.img
    => run fastboot

 * Build AOSP target db845c-userdebug with MMC sdcard support and flash images on
   the MMC sdcard. Make sure we run U-Boot's fastboot command on the device
   before running the flash commands:

 ::

    $ make TARGET_SDCARD_BOOT=true -j`nproc`
    $ cd out/target/product/db845c
    $ fastboot flash super ./super.img flash userdata ./userdata.img format:ext4 metadata reboot
    $ fastboot boot ./boot.img

 .. note::
    We do not flash **boot.img** on the sdcard; instead, we load the boot image from
    device RAM by running ``fastboot boot boot.img``.


 Device Maintainer(s)
 ********************
 - Amit Pundir <pundir at #aosp-developers on OFTC IRC>
	..
	# Copyright (c) 2023, Linaro Ltd.
	#
	# SPDX-License-Identifier: MIT

	RB3
	===

	RB3 is one of the supported dev-boards listed on
	`source.android.com <https://source.android.com/docs/setup/create/devices>`_.

	The vendor-packages required to build RB3 images with AOSP are
	listed `here <http://releases.devboardsforandroid.linaro.org/vendor-packages>`_.


	Getting started with RB3 (also known as DB845c)
	-----------------------------------------------

	Learn about your RB3 board as well as how to prepare and set up for basic
	use from the
	`96boards DB845c getting started page <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/getting-started/rb3-kit/>`_.

	Make sure you are running AOSP (ptable compatible) bootloader on DB845c. Latest
	bootloader binaries (build #97 and above) are `hosted here
	<http://snapshots.linaro.org/96boards/dragonboard845c/linaro/rescue/>`_.

	For flashing instructions checkout
	`96boards DB845c recovery page <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/installation/board-recovery.md.html>`_.

	.. note::
	You can also update bootloader binaries by running flashall script, which is
	a part of the vendor package of the RB3 AOSP build target. Boot in fastboot mode
	and run following command from your HOST machine:

	.. code::

	git clone https://gerrit.devboardsforandroid.linaro.org/linaro-vendor-package
	cd src/db845c/dragonboard-845c-bootloader-ufs-aosp/
	./flashall


	Install pre-built AOSP images on RB3
	------------------------------------

	Linaro create daily AOSP builds for DB845c that user can download, flash and
	boot from. If you are interested in prebuilt AOSP images for DB845c and want to
	avoid compiling your own, please download and flash boot.img, vendor_boot.img,
	super.img and userdata.img from
	`the snapshot here <http://snapshots.linaro.org/96boards/dragonboard845c/linaro/aosp-master>`_.

	Flash downloaded AOSP images by running following commands, while booted
	in fastboot mode::

	fastboot flash userdata userdata.img
	fastboot flash super super.img
	fastboot flash vendor_boot vendor_boot.img
	fastboot flash boot boot.img


	Compile AOSP from sources for RB3
	---------------------------------

	#. Download the AOSP source tree and build db845c-trunk_staging-userdebug build target:

	::

	repo init -u https://android.googlesource.com/platform/manifest -b master
	repo sync -j`nproc`
	./device/linaro/dragonboard/fetch-vendor-package.sh
	source ./build/envsetup.sh
	lunch db845c-trunk_staging-userdebug
	make -j`nproc`


	#. Install: `Boot DB845c into fastboot mode <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/installation/board-recovery.md.html#booting-into-fastboot>`_ and run following command:

	::

	./device/linaro/dragonboard/installer/db845c/flash-all-aosp.sh

	You can also perform QDL board recovery by running following script after
	booting DB845c in `USB flashing mode <https://www.96boards.org/documentation/consumer/dragonboard/dragonboard845c/installation/board-recovery.md.html#connecting-the-board-in-usb-flashing-mode-aka-edl-mode>`_:

	::

	./device/linaro/dragonboard/installer/db845c/recovery.sh


	Building the kernel for RB3
	---------------------------

	The Preferred option is to build DB845c Android GKI kernel artifacts using
	official Bazel build. Run the following commands to clone the kernel source,
	prebuilt Android toolchains and build scripts.

	::

	mkdir repo-db845c
	cd repo-db845c
	repo init -u https://android.googlesource.com/kernel/manifest -b common-android-mainline
	repo sync -j`nproc`
	tools/bazel clean
	tools/bazel run //common:db845c_dist

	Now delete all the objects in
	$(AOSP_TOPDIR)device/linaro/dragonboard-kernel/android-mainline/, then copy
	build artifacts from out/db845c/dist/ to
	$(AOSP_TOPDIR)/device/linaro/dragonboard-kernel/android-mainline/

	If you want to properly test the GKI kernel, you should

	* grab the latest kernel_aarch64 build from
	https://ci.android.com/builds/branches/aosp_kernel-common-android-mainline/grid?

	* under artifacts, download the Image.gz and copy it to
	$(AOSP_TOPDIR)/device/linaro/dragonboard-kernel/android-mainline/

	Then rebuild AOSP using:

	::

	make TARGET_KERNEL_USE=mainline -j`nproc`'


	Booting AOSP from MMC Sdcard
	----------------------------

	Booting AOSP on DB845c from a mmc sdcard is an experimental build configuration
	and is only intended to be used in the LKFT lab. Regular users should not enable
	this build flag and should flash and boot from the UFS instead.

	Booting from external sdcards will help prevent the internal emmc/ufs wear off
	in the long run and extend the lab-life of most of our devboards. To avoid
	flashing anything on internal UFS and boot solely from a sdcard, we are
	switching to chainloading U-Boot from ABL bootloader. For now we are using a WIP
	`upstream u-boot fork <https://source.devboardsforandroid.linaro.org/platform/external/u-boot/>`_.

	.. note::
	In the long run we plan to switch to AOSP/external/u-boot project to catch up
	with the Android bootloader features.

	Set ``TARGET_SDCARD_BOOT=true`` at build time to build and boot AOSP from a mmc
	sdcard. This device configuration need atleast 8GB sdcard to boot from. Here are
	the instructions to prepare and flash AOSP images on a MMC sdcard:

	.. note::
	Following commands that are listed with => prompt means those commands need
	to be run from the u-boot prompt on the device and commands with $ means
	they need to be run from the HOST machine.

	* Boot DB845c in the fastboot mode as mentioned above and erase the boot
	partition to make sure that every reboot/reset lands at the ABL fastboot mode
	prompt.

	::

	$ fastboot erase boot

	* Build U-Boot for DB845c and boot with it:

	::

	$ git clone https://source.devboardsforandroid.linaro.org/platform/external/u-boot
	$ cd u-boot
	$ source envsetup.sh
	$ mu qcom_defconfig
	$ budt dragonboard845c
	$ fastboot boot /tmp/u-boot.img # this will boot U-Boot on DB845c

	* Prepare AOSP partition layout on the sdcard from the U-Boot prompt. Make sure
	that a 8GB+ MMC sdcard is plugged into the board:

	::

	=> run gpt_mmc_aosp
	=> reset # this will reboot in ABL fastboot mode
	$ fastboot boot /tmp/u-boot.img
	=> run fastboot # starting U-Boot's fastboot command
	$ fastboot erase boot erase init_boot erase vendor_boot erase modemst1 erase modemst2 erase fsg erase fsc erase misc erase metadata erase super erase userdata
	$ fastboot reboot # rebooting in ABL fastboot mode
	$ fastboot boot /tmp/u-boot.img
	=> run fastboot

	* Build AOSP target db845c-userdebug with MMC sdcard support and flash images on
	the MMC sdcard. Make sure we run U-Boot's fastboot command on the device
	before running the flash commands:

	::

	$ make TARGET_SDCARD_BOOT=true -j`nproc`
	$ cd out/target/product/db845c
	$ fastboot flash super ./super.img flash userdata ./userdata.img format:ext4 metadata reboot
	$ fastboot boot ./boot.img

	.. note::
	We do not flash boot.img on the sdcard; instead, we load the boot image from
	device RAM by running ``fastboot boot boot.img``.


	Device Maintainer(s)
	********************
	- Amit Pundir <pundir at #aosp-developers on OFTC IRC>