Khadas VIM3L linux kernel 4.19 빌드하기

여러가지 시도 끝에 android 11 빌드를 성공함

https://blog.djjproject.com/836

 

이때 커널 버전을 4.19로 진행하여 부팅을 성공했음.

4.19 커널을 받아 이미지를 직접 생성해보아야함

 

https://android.googlesource.com/kernel/hikey-linaro

$ mkdir kernel-source $ cd kernel-source/ $ git clone https://android.googlesource.com/kernel/hikey-linaro -b android-amlogic-bmeson-4.19 .

[~/vim3l-a11/device/amlogic/kernel-source] $ ls android                            build.config.gki-debug.x86_64     crypto         MAINTAINERS arch                               build.config.gki_kasan            Documentation  Makefile block                              build.config.gki_kasan.aarch64    drivers        mm build.config.aarch64               build.config.gki_kasan.x86_64     firmware       net build.config.allmodconfig          build.config.gki_kprobes          fs             OWNERS build.config.allmodconfig.aarch64  build.config.gki_kprobes.aarch64  include        README build.config.allmodconfig.arm      build.config.gki_kprobes.x86_64   init           samples build.config.allmodconfig.x86_64   build.config.gki.x86_64           ipc            scripts build.config.arm                   build.config.x86_64               Kbuild         security build.config.common                build.config.yukawa.aarch64       Kconfig        sound build.config.gki                   certs                             kernel         tools build.config.gki.aarch64           COPYING                           lib            usr build.config.gki-debug.aarch64     CREDITS                           LICENSES       virt

 

추가 툴체인 clone

$ git clone https://android.googlesource.com/platform/prebuilts/gas/linux-x86 prebuilts/gas/linux-x86

 

환경변수 설정

[~/vim3l-a11] $ export TOP=$(pwd) [~/vim3l-a11] $ echo $TOP /home/djjproject/vim3l-a11

$ export PATH=$TOP/prebuilts/clang/host/linux-x86/clang-r383902b/bin:$PATH $ export PATH=$TOP/prebuilts/gas/linux-x86:$PATH $ export PATH=$TOP/prebuilts/misc/linux-x86/lz4:$PATH

 

빌드 수행 전, 환경변수 설정

$ export ARCH=arm64 $ export CROSS_COMPILE=aarch64-linux-gnu- $ export LLVM=1

 

커널 빌드 수행

$ cd device/amlogic/kernel-source/ $ make meson_defconfig $ make DTC_FLAGS="-@" -j12

#### build completed successfully (05:38 (mm:ss)) ####

 

파일 배치 전에 원본 파일 확인

[~/vim3l-a11/device/amlogic/kernel-source] $ ls ../yukawa-kernel/4.19/ Image.lz4                      meson-g12b-a311d-khadas-vim3-android.dtb  meson-sm1-khadas-vim3l.dtb meson-g12a-sei510-android.dtb  meson-g12b-a311d-khadas-vim3.dtb          meson-sm1-sei610-android.dtb meson-g12a-sei510.dtb          meson-sm1-khadas-vim3l-android.dtb        meson-sm1-sei610.dtb

 

device 소스에서 어느 dtb 사용하는지 확인

[~/vim3l-a11/device/amlogic/yukawa] $ cat build/tasks/dtimages.mk # Please keep this list fixed: add new files in the end of the list DTB_FILES := \         $(LOCAL_DTB)/meson-g12a-sei510.dtb \         $(LOCAL_DTB)/meson-sm1-sei610.dtb \         $(LOCAL_DTB)/meson-sm1-khadas-vim3l.dtb \         $(LOCAL_DTB)/meson-g12b-a311d-khadas-vim3.dtb # Please keep this list fixed: add new files in the end of the list DTBO_FILES := \         $(LOCAL_DTB)/meson-g12a-sei510-android.dtb \         $(LOCAL_DTB)/meson-sm1-sei610-android.dtb \         $(LOCAL_DTB)/meson-sm1-khadas-vim3l-android.dtb \         $(LOCAL_DTB)/meson-g12b-a311d-khadas-vim3-android.dtb \

위 목록에서 선택을 어떻게 하는거지?

 

meson-sm1-khadas-vim3l-android.dts 는 overlay 파일

s905d3 CPU이기 때문에 코드명은 sm1 이 맞음

위에서 보이는 sei510 은 S905X2 (g12a) / sei610은 S905X3 (sm1)

# kernel-source/arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l-android.dts // SPDX-License-Identifier: (GPL-2.0+ OR MIT) /*  * Copyright (c) 2019 BayLibre SAS. All rights reserved.  */ /dts-v1/; /plugin/; #include <dt-bindings/phy/phy.h> #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/gpio/meson-g12a-gpio.h> #include <dt-bindings/input/input.h> #include <dt-bindings/interrupt-controller/irq.h> / {   compatible = "khadas,vim3l", "amlogic,sm1";   model = "Khadas VIM3L";   fragment@101 {         target-path = "/";         __overlay__ {                 reserved-memory {                         #address-cells = <2>;                         #size-cells = <2>;                         ramoops@0x0d000000 {                                 compatible = "ramoops";                                 reg = <0x0 0x0d000000 0x0 0x00100000>;                                 record-size = <0x8000>;                                 console-size = <0x8000>;                                 ftrace-size = <0x0>;                                 pmsg-size = <0x8000>;                         };                 };

 

u-boot 소스를 확인해봐야 하지만, 아래 cmdline 을 보면

androidboot.dtbo_idx=2

 

아래의 순서대로 overlay 됨을 알 수 있음

meson-sm1-khadas-vim3l.dtb --> meson-sm1-khadas-vim3l-android.dtb

 

실제로 meson-sm1-khadas-vim3l.dts 파일을 보면

# arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l.dts // SPDX-License-Identifier: (GPL-2.0+ OR MIT) /*  * Copyright (c) 2019 BayLibre, SAS  * Author: Neil Armstrong <narmstrong@baylibre.com>  */ /dts-v1/; #include "meson-sm1.dtsi" #include "meson-khadas-vim3.dtsi" / {     compatible = "khadas,vim3l", "amlogic,sm1";     model = "Khadas VIM3L";     vddcpu: regulator-vddcpu {         /*          * Silergy SY8030DEC Regulator.          */         compatible = "pwm-regulator";         regulator-name = "VDDCPU";         regulator-min-microvolt = <690000>;         regulator-max-microvolt = <1050000>;         vin-supply = <&vsys_3v3>;         pwms = <&pwm_AO_cd 1 1250 0>;         pwm-dutycycle-range = <100 0>;         regulator-boot-on;         regulator-always-on;     }; }; &cpu0 {     cpu-supply = <&vddcpu>;     operating-points-v2 = <&cpu_opp_table>;     clocks = <&clkc CLKID_CPU_CLK>;     clock-latency = <50000>; };

 

그러면 결국에 복사해야할 파일은 3개임

Image.lz4 meson-sm1-khadas-vim3l.dtb meson-sm1-khadas-vim3l-android.dtb

 

dtb 파일 복사

[~/vim3l-a11/device/amlogic/kernel-source] $ cp arch/arm64/boot/dts/amlogic/ meson-sm1-khadas-vim3l.dtb ../yukawa-kernel/4.19/ meson-sm1-khadas-vim3l.dtb $ cp arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l-android.dtb ../yukawa-kernel/4.19/meson-sm1-khadas-vim3l-android.dtb

 

커널이미지 압축 및 복사

[~/vim3l-a11/device/amlogic/kernel-source] $ lz4c -f arch/arm64/boot/Image arch/arm64/boot/Image.lz4 Compressed 29659648 bytes into 20010826 bytes ==> 67.47% $ cp arch/arm64/boot/Image.lz4 ../yukawa-kernel/4.19/Image.lz4

 

boot.img / dtbo.img re-generate

[~/vim3l-a11] $ rm out/target/product/yukawa/boot.img out/target/product/yukawa/dtbo-unsigned.img

[~/vim3l-a11] $ make TARGET_VIM3L=true TARGET_KERNEL_USE=4.19 bootimage dtboimage -j12

 

커널 이미지 write / 보드를 USB 부트 모드로 놓고 진행

[~/vim3l-a11/out/target/product/yukawa] $ sudo boot-g12.py ../../../../device/amlogic/yukawa/bootloader/u-boot_kvim3l_noab.bin Firmware Version : ROM: 3.2 Stage: 0.0 Need Password: 0 Password OK: 0 Writing ../../../../device/amlogic/yukawa/bootloader/u-boot_kvim3l_noab.bin at 0xfffa0000... [DONE] Running at 0xfffa0000... [DONE] AMLC dataSize=16384, offset=65536, seq=0... [DONE] AMLC dataSize=49152, offset=393216, seq=1... [DONE] AMLC dataSize=16384, offset=229376, seq=2... [DONE] AMLC dataSize=49152, offset=245760, seq=3... [DONE] AMLC dataSize=16384, offset=65536, seq=4... [DONE] AMLC dataSize=49152, offset=393216, seq=5... [DONE] AMLC dataSize=16384, offset=229376, seq=6... [DONE] AMLC dataSize=49152, offset=245760, seq=7... [DONE] AMLC dataSize=49152, offset=294912, seq=8... [DONE] AMLC dataSize=16384, offset=65536, seq=9... [DONE] AMLC dataSize=1115504, offset=81920, seq=10... [DONE] [BL2 END]

[~/vim3l-a11/out/target/product/yukawa] $ sudo fastboot flash boot boot.img target reported max download size of 117440512 bytes sending 'boot' (15806 KB)... OKAY [  4.034s] writing 'boot'... OKAY [  1.506s] finished. total time: 5.541s [~/vim3l-a11/out/target/product/yukawa] $ sudo fastboot flash dtbo dtbo-unsigned.img target reported max download size of 117440512 bytes sending 'dtbo' (9 KB)... OKAY [  0.016s] writing 'dtbo'... OKAY [  0.011s] finished. total time: 0.026s [~/vim3l-a11/out/target/product/yukawa] $ sudo fastboot reboot rebooting...

 

커널 버전 확인 / 빌드 시간이 바뀐걸 확인 가능

vim3l:/ # uname -a Linux localhost 4.19.269-g9a555badda2a #1 SMP PREEMPT Tue Mar 4 12:44:12 UTC 2025 aarch64