This projects aims to create an upgradable AOSP build system for the Redmi K20 Pro (raphael). No repository from AOSP is changed: no commit over AOSP is at the moment present on these sources.
All the changes are provided in separate repositories: this allows to upgrade Android with minimal effort, potentially also for future major versions.
Most of the added repositories is provided by LineageOS and PixelExperience or CAF, so thanks to them for those repos.
Follow the instructions from Google to setup a machine to build AOSP master branch: https://source.android.com/setup/build/initializing
Then, sync all the sources:
$ repo init -u https://android.googlesource.com/platform/manifest -b master
$ cd .repo
$ git clone --branch master https://github.com/log1cs/local_manifests.git local_manifests
$ cd ..
$ repo sync -c --no-clone-bundle --no-tags
then:
$ source build/envsetup.sh
$ lunch aosp_raphael-user (or lunch aosp_raphael-userdebug)
$ make -j12
the images will be available in out/target/product/raphael.
To build an OTA:
$ source build/envsetup.sh
$ lunch aosp_raphael-user (or lunch aosp_raphael-userdebug)
$ make -j12
$ make otatools-package -j12
$ make otapackage_custom -j12
and the OTA zip will be available in out/target/product/raphael.
The images can be flashed using fastboot:
$ fastboot flash boot out/target/product/raphael/boot.img
$ fastboot flash recovery out/target/product/raphael/recovery.img
$ fastboot flash system out/target/product/raphael/system.img
$ fastboot flash vendor out/target/product/raphael/vendor.img
Format data if this is a first flash:
$ fastboot format userdata
Note that not all the fastboot versions support the 'format' command.
The OTA can be flashed from the recovery (using the 'ADB sideload' feature) or using third party recoveries like TWRP.
The ROM sources include a prebuilt kernel. To build a kernel from sources and update it in the Android sources, follow these instructions.
Download the sources and the cross compilers (needed only the first time):
$ cd ~
$ mkdir kernel_build
$ cd kernel_build
$ git clone --single-branch --branch thirteen https://github.com/log1cs/kernel_xiaomi_sm8150.git kernel_xiaomi_sm8150
$ git clone --depth 1 -b android12L-release --single-branch https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/ prebuilt_aarch64
$ git clone --depth 1 -b android12L-release --single-branch https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/ prebuilt_arm
$ git clone --depth 1 -b android-13.0.0_r6 --single-branch https://android.googlesource.com/platform/prebuilts/clang/host/linux-x86 prebuilt_clang
$ git clone --depth 1 -b android-13.0.0_r6 --single-branch https://android.googlesource.com/platform/prebuilts/build-tools prebuilt_tools
Build the kernel:
$ cd ~/kernel_build/kernel_xiaomi_sm8150
$ git pull
$ CC_ARM32_PATH=~/kernel_build/prebuit_arm/bin
$ CC_ARCH64_PATH=~/kernel_build/prebuilt_aarch64/bin
$ CC_CLANG_PATH=~/kernel_build/prebuilt_clang/clang-r450784d/bin
$ MAKE_PATH=~/kernel_build/prebuilt_tools/linux-x86/bin
$ ${MAKE_PATH}/make -j8 ARCH=arm64 CROSS_COMPILE_ARM32=arm-linux-androidkernel- CROSS_COMPILE=aarch64-linux-android- CC=clang CLANG_TRIPLE=aarch64-linux- PATH="${CC_ARM32_PATH}:${CC_ARCH64_PATH}:${CC_CLANG_PATH}:${PATH}" O=out LLVM=1 LLVM_IAS=1 lycoris_raphael_defconfig
$ ${MAKE_PATH}/make -j8 ARCH=arm64 CROSS_COMPILE_ARM32=arm-linux-androidkernel- CROSS_COMPILE=aarch64-linux-android- CC=clang CLANG_TRIPLE=aarch64-linux- PATH="${CC_ARM32_PATH}:${CC_ARCH64_PATH}:${CC_CLANG_PATH}:${PATH}" O=out LLVM=1 LLVM_IAS=1
Copy the Image.gz-dtb file from the prebuilt directory to the Android build system:
$ cp ~/kernel_build/kernel_xiaomi_sm8150/out/arch/arm64/boot/Image.gz-dtb ~/aosp_build_system/kernel/raphael/prebuilt/Image.gz-dtb
Build Android again to update the kernel.
Some patches are needed over AOSP to fix specific issues. At the moment, 2 patches are needed:
- To avoid crashes with some Gapps versions: https://github.com/crdroidandroid/android_external_setupcompat/commit/0450c92cbe5c75cc31d4cdc0958918836b28ca53
- To fix issues with SIM 2: https://github.com/crdroidandroid/android_frameworks_opt_telephony/commit/cbded5de818d1d23ea8ac7a67f178a95da64a9f0
- To enable the styles and colors selection under Settings -> Wallpaper & style: https://github.com/Flamingo-OS/packages_apps_Launcher3/commit/e6d6b64264ef45a72791347d9f39d85ff412e58f https://github.com/LineageOS/android_packages_apps_ThemePicker/commit/14584d051eb8959e8bfb3b29173a0c40b9e991c5
- To fix a Dialer crash when opening Settings -> Display options: https://github.com/RiceDroid/android_packages_apps_Dialer/commit/8c4ab1faf4d534d32f570c4bf9cf002ab3ad20d0
- Fix offline charging 'always on display' issue: https://android-review.googlesource.com/c/platform/bootable/recovery/+/2205736/
These patches are not necessary to boot or use Android.
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