Openharmony之GPU Mesa3D移植一（weston 老框架）
目录
1、获取openharmony rk分支版本代码
2、编译5.10内核
1）修改DTS
2）修改config配置
3）修改drivers/gpu/drm/drm_ioctl.c
4）编译
5）刷机
3、编译Buildroot
1）下载代码
2）修改配置
3）编译
4）刷机测试
4、重新编译rk分支
1）找到编译好的二进制文件
2）修改rk分支代码对应的编译配置项
3）重新编译
4）刷机
注意：
5、问题
1）内核编译报错：
2）内核刷机后进不了系统
3）编译buildroot报错
4）编译rk报错undefined symbol: wl_egl_window_create
5）编译rk报错undefined symbol: glEnable
6）刷机进入系统后图形起不来
本文主要介绍在OpenHarmony上，基于RK3568移植开源GPU Mesa3D图形驱动，使用的基线版本是openharmony 的RK分支+kernel4.19+Weston。
注意：weston是老版本中使用的，新版中已使用renderservice替换。
1、获取openharmony rk分支版本代码
该基线版本是RK分支的OpenHarmony版本，选用此版本的原因是，该版本使能了闭源的GPU。
- 从官网上拉取代码
创建编译openharmony的docker，安装依赖，下载源码，以及编译
- 创建docker：
- podman run --name hm-rk -it -v /home/test/22-01-30_rk /:/home/openharmony swr.cn-south-1.myhuaweicloud.com/openharmony-docker/openharmony-docker-standard:0.0.7 /bin/bash
- git config --global user.name "test"
- git config --global user.email "[email protected]"
- git config --global credential.helper store
- 安装依赖：
- curl -s https://gitee.com/oschina/repo/raw/fork_flow/repo-py3 > /usr/local/bin/repo
- chmod a+x /usr/local/bin/repo
- apt-get update && apt-get install -y binutils git git-lfs gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z1-dev ccache libgl1-mesa-dev libxml2-utils xsltproc unzip m4 bc gnutls-bin python3.8 python3-pip ruby libssl-dev
- pip3 install -i https://repo.huaweicloud.com/repository/pypi/simple requests
- 下载源码：
- repo init -u https://gitee.com/openharmonyrk/manifest -b master -m rk.xml --no-repo-verify
- repo sync -c
- repo forall -c 'git lfs pull'
- 编译：
- bash build/prebuilts_download.sh
- ./build.sh --product-name rk3568 --ccache
编译成功，刷机后，能进入系统，但是没有图形，注意RK版本的代码本省不能进图形是正常的。
2、编译5.10内核
Mesa3D需要高版本内核支持，而RK分支使用的是4.19的内核，所以需要升级内核，当前开源鸿蒙中2022.1.10后主干代码支持kernel5.10，因此编译kernel5.10需要使用Master 1.10以后的代码版本，具体如下：
- mkdir hm-master && cd hm-master
- podman run --name hm-master -it -v /home/test/hm-master/:/home/openharmony swr.cn-south-1.myhuaweicloud.com/openharmony-docker/openharmony-docker-standard:0.0.7 /bin/bash
- git config --global user.name "test"
- git config --global user.email "[email protected]"
- git config --global credential.helper store
- curl -s https://gitee.com/oschina/repo/raw/fork_flow/repo-py3 > /usr/local/bin/repo
- chmod a+x /usr/local/bin/repo
- repo init -u https://gitee.com/openharmony/manifest.git -b master --no-repo-verify
- repo sync -c
- repo forall -c 'git lfs pull'
- bash build/prebuilts_download.sh
- ./build.sh --product-name rk3568 --ccache --build-target kernel
注意：文档中只有本小节，即编译510内核才需要使用主干1.10以后的代码版本，其它小节均使用的是RK分支版本代码。
1）修改DTS
修改out/kernel/src_tmp/linux-5.10/arch/arm64/boot/dts/rockchip/rk3568.dtsi适配开源panfrost，如下：
--- arch/arm64/boot/dts/rockchip/rk3568.dtsi-bak 2022-02-15 01:39:52.169152789 +0000
+++ arch/arm64/boot/dts/rockchip/rk3568.dtsi 2022-02-15 02:02:42.096047298 +0000
@@ -1169,36 +1169,23 @@
};
gpu: gpu@fde60000 {
- compatible = "arm,mali-bifrost";
- reg = <0x0 0xfde60000 0x0 0x4000>;
+ compatible = "rockchip, rk3568-mali", "arm,mali-bifrost";
+ reg = <0x0 0xfde60000 0x0 0x20000>;
- interrupts = ,
+ interrupts = ,
,
- ;
- interrupt-names = "GPU", "MMU", "JOB";
-
- upthreshold = <40>;
- downdifferential = <10>;
-
+ ;
+ interrupt-names = "job", "mmu", "gpu";
clocks = <&scmi_clk 1>, <&cru CLK_GPU>;
- clock-names = "clk_mali", "clk_gpu";
- power-domains = <&power RK3568_PD_GPU>;
- #cooling-cells = <2>;
+ clock-names = "core", "bus";
operating-points-v2 = <&gpu_opp_table>;
+ #cooling-cells = <2>;
+ power-domains = <&power RK3568_PD_GPU>;
status = "disabled";
- gpu_power_model: power-model {
- compatible = "simple-power-model";
- leakage-range= <5 15>;
- ls = <(-24002) 22823 0>;
- static-coefficient = <100000>;
- dynamic-coefficient = <953>;
- ts = <(-108890) 63610 (-1355) 20>;
- thermal-zone = "gpu-thermal";
- };
};
- gpu_opp_table: opp-table2 {
+ gpu_opp_table: gpu-opp-table {
compatible = "operating-points-v2";
mbist-vmin = <825000 900000 950000>;
@@ -1227,7 +1214,7 @@
};
opp-800000000 {
opp-hz = /bits/ 64 <800000000>;
- opp-microvolt = <950000>;
+ opp-microvolt = <1000000>;
};
}; 2）修改config配置
- cd out/kernel/src_tmp/linux-5.10
- make menuconfig ARCH=arm64
在graphic support中启用panfrost，
然后在Direct Rendering Manager取消选择Ignore drm ioctl permission，然后保存退出配置。
保存配置，并退出。
使用新的.config配置覆盖rockchip_linux_defconfig配置，使用make-ohos.sh脚本编译时config才能生效，如下：
cp .config arch/arm64/configs/rockchip_linux_defconfig
3）修改drivers/gpu/drm/drm_ioctl.c
修改out/kernel/src_tmp/linux-5.10/drivers/gpu/drm/drm_ioctl.c搜索关键字DUMB，将0修改为DRM_RENDER_ALLOW, 如下：
--- drivers/gpu/drm/drm_ioctl.c-bak 2022-02-16 02:16:18.211452279 +0000
+++ drivers/gpu/drm/drm_ioctl.c 2022-02-16 02:17:01.138864226 +0000
@@ -680,9 +680,9 @@
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb_ioctl, 0),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, 0),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, 0),
- DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, 0),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, 0),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER), 4）编译
PRODUCT_PATH="vendor/hihope/rk3568" ./make-ohos.sh TB-RK3568X0
5）刷机
图中所示img全部使用新版内核中编译出来的img刷机，即master部分都需要刷入编译5.10内核出来的img，
3、编译Buildroot
编译环境：ubuntu20.04
1）下载代码
- git clone https://gitee.com/xfan1024/oh-buildroot-mesa3d -b rpi3b
- cd oh-buildroot-mesa3d
- apt-get install cpio ruby -y
2）修改配置
- make mesa3d_rpi3b_defconfig
- make menuconfig ARCH=arm64
修改如下：
如果需要测试glmark2，还应该选中glmaster2
选中glmark2，然后保存退出，重新编译
3）编译
make -j8
4）刷机测试
在system分区刷入buildroot编译出来rootfs.ext2镜像，刷机成功后，在终端运行glmark2-es2-wayland，验证内核panfrost驱动和用户态panfrost驱动是否可以正常工作，具体如下：
- mkdir /tmp/xdg
- export XDG_RUNTIME_DIR=/tmp/xdg
- weston --tty 1 &
- glmark2-es2-wayland
4、重新编译rk分支
1）找到编译好的二进制文件
将通过buildroot编译出来的二进制文件拷贝到rk分支的device/rockchip/hardware/gpu/中，
output/target/usr/lib/libEGL.so.1
output/target/usr/lib/libGLESv1_CM.so.1
output/target/usr/lib/libGLESv2.so.2
output/target/usr/lib/libgbm.so.1
output/target/usr/lib/libglapi.so.0
output/build/mesa3d-21.3.3/build/src/gallium/targets/dri/libgallium_dri.so 2）修改rk分支代码对应的编译配置项
修改device/rockchip/rk3568/BUILD.gn
import("//build/ohos.gni")
print("rk3568_group in")
group("rk3568_group") {
deps = [
"//device/rockchip/hardware/gpu:libgallium_dri"
]
}修改device\rockchip\hardware\gpu\BUILD.gn为：
import("//build/ohos.gni")
import("//build/ohos/ndk/ndk.gni")
mesa3d_common_prebuilts = [
"libgbm.so.1",
"libEGL.so.1",
"libglapi.so.0",
"libGLESv1_CM.so.1",
"libGLESv2.so.2",
]
mesa3d_common_deps = []
foreach(file, mesa3d_common_prebuilts) {
target = "mesa3d-common-$file"
ohos_prebuilt_shared_library(target) {
source = file
subsystem_name = "hdf"
part_name = "hdf"
install_enable = true
}
mesa3d_common_deps += [ ":$target" ]
}
group("mali-bifrost-g52-g2p0-wayland") {
deps = mesa3d_common_deps
}
ohos_prebuilt_shared_library("libgallium_dri") {
source = "libgallium_dri.so"
part_name = "rockchip_products"
install_enable = true
symlink_target_name = [
"panfrost_dri.so",
"rockchip_dri.so",
]
} 修改third_party/weston/libweston/renderer-gl/egl-glue.c
--- libweston/renderer-gl/egl-glue.c-bak 2022-02-16 15:10:25.758230255 +0800
+++ libweston/renderer-gl/egl-glue.c 2022-02-16 15:13:36.431391104 +0800
@@ -662,7 +662,8 @@
gr->has_dmabuf_import_modifiers = true;
}
- if (weston_check_egl_extension(extensions, "EGL_KHR_fence_sync")) {
+ if (weston_check_egl_extension(extensions, "EGL_KHR_fence_sync") &&
+ weston_check_egl_extension(extensions, "EGL_ANDROID_native_fence_sync")) {
gr->create_sync =
(void *) eglGetProcAddress("eglCreateSyncKHR");
gr->destroy_sync = 修改foundation/graphic/standard/frameworks/surface/src/producer_egl_surface.cpp
--- foundation/graphic/standard/frameworks/surface/src/producer_egl_surface.cpp-bak 2022-02-16 15:16:00.298830342 +0800
+++ foundation/graphic/standard/frameworks/surface/src/producer_egl_surface.cpp 2022-02-16 15:18:26.454451058 +0800
@@ -307,6 +307,9 @@
if (CreateEglFenceFd(fd) != SURFACE_ERROR_OK) {
BLOGNE("CreateEglFenceFd failed.");
// return SURFACE_ERROR_ERROR;
+ fd = EGL_NO_NATIVE_FENCE_FD_ANDROID;
+ glFlush();
+ glFinish();
}
BLOGNE("flush fence fd %{public}d.", fd); 修改base/startup/init_lite/ueventd/etc/ueventd.config
--- base/startup/init_lite/ueventd/etc/ueventd.config-bak 2022-02-16 15:19:16.460426687 +0800
+++ base/startup/init_lite/ueventd/etc/ueventd.config 2022-02-16 15:19:44.243635535 +0800
@@ -73,4 +73,5 @@
/dev/rtc0 0640 1000 1000
/dev/tty0 0660 0 1000
/dev/uinput 0660 3011 3011
-
+/dev/dri/card1 0666 0 1003
+/dev/dri/renderD129 0666 0 1003 修改third_party/wayland_standard/BUILD.gn
--- ../22-01-30_rk-bak/third_party/wayland_standard/BUILD.gn 2022-01-30 15:37:09.000000000 +0800
+++ third_party/wayland_standard/BUILD.gn 2022-02-21 17:59:33.821781825 +0800
@@ -181,6 +181,22 @@
]
}
+ohos_shared_library("wayland_egl") {
+ sources = [
+ "egl/wayland-egl.c",
+ ]
+ include_dirs = [
+ "egl",
+ "include/protocol",
+ "src",
+ ]
+ public_deps = [
+ ":wayland_core_protocol",
+ ":wayland_version",
+ ]
+ part_name = "graphic_standard"
+ subsystem_name = "graphic"
+}
ohos_shared_library("libwayland_client.0") {
sources = [
"src/connection.c", 修改third_party/weston/BUILD.gn
--- /home/test/22-01-30_rk-bak/third_party/weston/BUILD.gn 2022-01-30 15:37:09.000000000 +0800
+++ third_party/weston/BUILD.gn 2022-02-21 17:51:04.904373460 +0800
@@ -392,6 +392,7 @@
"libweston",
"libweston/backend-drm/auth",
".",
+ "//third_party/wayland_standard/egl",
]
cflags = [
@@ -496,6 +497,7 @@
"//third_party/wayland_standard:libwayland_client",
"//device/rockchip/hardware/gpu:mali-bifrost-g52-g2p0-wayland",
"//foundation/graphic/standard/frameworks/wmserver:wms_protocol",
+ "//third_party/wayland_standard:wayland_egl",
]
part_name = "graphic_standard" 修改配置foundation/graphic/standard/frameworks/animation_server/BUILD.gn
--- a/frameworks/animation_server/BUILD.gn
+++ b/frameworks/animation_server/BUILD.gn
@@ -116,6 +116,7 @@ ohos_executable("animation_server") {
"//foundation/graphic/standard:libwmservice",
"//foundation/graphic/standard/utils:libgraphic_utils",
"//foundation/multimodalinput/input/frameworks/proxy:libmmi-client",
+ "//device/hihope/hardware/gpu:mali-bifrost-g52-g2p0-wayland",
]
part_name = "graphic_standard" 修改third_party/weston/weston.cfg 配置，
--- ../22-01-30_rk-bak/third_party/weston/weston.cfg 2022-01-30 15:37:09.000000000 +0800
+++ third_party/weston/weston.cfg 2022-02-22 09:51:33.688896864 +0800
@@ -14,6 +14,8 @@
"export XKB_CONFIG_EXTRA_PATH /etc/xkb",
"mkdir /data/weston",
"chmod 777 /data/weston",
+ "chmod 777 -R /dev/dri/*",
+ "export LIBGL_DRIVERS_PATH /system/lib",
"start weston",
"trigger weston_start",
"sleep 2" 3）重新编译
./build.sh --product-name rk3568 –ccache
4）刷机
System、vendor、userdata 3个分区刷入rk分支新编译出来的img，
刷机成功后，能正常进入系统，图形也正常启动，使用中速度明显感觉快了很多，即使输入wifi密码也能成功。
5、问题
1）内核编译报错：
解决办法：
使用命令，
PRODUCT_PATH="vendor/hihope/rk3568" ./make-ohos.sh TB-RK3568X0
2）内核刷机后进不了系统
把rk编译出来的img刷机后能进入系统，但是没有图形，把之前编译出来的rootfs.ext2和新编译出来的510内核boot_linux.img刷机后，串口显示如下：
解决办法：
有两种办法，一是把新老boot_linux.img 解压开对比
新老版中extlinux.conf对比发现都是类似的内容，唯一的区别就是有如TC031C的标识，串口输出中有找不到extlinux.conf.TC031C的打印
把old中extlinux.conf.TC031C拷贝到新版中，并复制toybrick.dtb为toybrick.dtb.TC031C
- cd new
- cp toybrick.dtb toybrick.dtb.TC031C
- cp ../old/extlinux.conf.TC031C ./
重新刷入新的boot_linux.img，正常进入系统。
二是图中所示img全部使用新版内核中编译出来的img刷机（推荐该办法）。
3）编译buildroot报错
编译报如下：
解决办法：
删除output目录，修改编译参数重新编译
- rm -rf output/
- make -j8
4）编译rk报错undefined symbol: wl_egl_window_create
错误提示如下：
ld.lld: error: undefined symbol: wl_egl_window_create
>>> referenced by simple-egl-hos.c:371 (../../third_party/weston/clients/simple-egl-hos.c:371)
>>> obj/third_party/weston/clients/simple-egl-hos/simple-egl-hos.o:(main)
ld.lld: error: undefined symbol: wl_egl_window_destroy
>>> referenced by simple-egl-hos.c:418 (../../third_party/weston/clients/simple-egl-hos.c:418)
>>> obj/third_party/weston/clients/simple-egl-hos/simple-egl-hos.o:(main)
clang-10: error: linker command failed with exit code 1 (use -v to see invocation) 解决办法：
在third_party/wayland_standard/BUILD.gn中新增编译wayland-egl.c
--- ../22-01-30_rk-bak/third_party/wayland_standard/BUILD.gn 2022-01-30 15:37:09.000000000 +0800
+++ third_party/wayland_standard/BUILD.gn 2022-02-21 17:59:33.821781825 +0800
@@ -181,6 +181,22 @@
]
}
+ohos_shared_library("wayland_egl") {
+ sources = [
+ "egl/wayland-egl.c",
+ ]
+ include_dirs = [
+ "egl",
+ "include/protocol",
+ "src",
+ ]
+ public_deps = [
+ ":wayland_core_protocol",
+ ":wayland_version",
+ ]
+ part_name = "graphic_standard"
+ subsystem_name = "graphic"
+}
ohos_shared_library("libwayland_client.0") {
sources = [
"src/connection.c", 在third_party/weston/BUILD.gn中增加对应的依赖
--- /home/test/22-01-30_rk-bak/third_party/weston/BUILD.gn 2022-01-30 15:37:09.000000000 +0800
+++ third_party/weston/BUILD.gn 2022-02-21 17:51:04.904373460 +0800
@@ -392,6 +392,7 @@
"libweston",
"libweston/backend-drm/auth",
".",
+ "//third_party/wayland_standard/egl",
]
cflags = [
@@ -496,6 +497,7 @@
"//third_party/wayland_standard:libwayland_client",
"//device/rockchip/hardware/gpu:mali-bifrost-g52-g2p0-wayland",
"//foundation/graphic/standard/frameworks/wmserver:wms_protocol",
+ "//third_party/wayland_standard:wayland_egl",
]
part_name = "graphic_standard" 5）编译rk报错undefined symbol: glEnable
错误提示如下：
[OHOS INFO] [2775/3124] ACTION //third_party/jsframework:ark_jsf(//build/toolchain/ohos:ohos_clang_arm)
^[[91m[OHOS ERROR]^[[0m [2756/3124] LINK graphic/graphic_standard/animation_server
^[[91m[OHOS ERROR]^[[0m FAILED: graphic/graphic_standard/animation_server exe.unstripped/graphic/graphic_standard/animation_server
^[[91m[OHOS ERROR]^[[0m /usr/bin/env "../../build/toolchain/gcc_link_wrapper.py" --output="graphic/graphic_standard/animation_server" --strip="../../prebuilts/clang/ohos/linux-x86_64/llvm/bin/llvm-strip" --unstripped-file="./exe.unstripped/graphic/graphic_standard/animation_server" -- ../../prebuilts/clang/ohos/linux-x86_64/llvm/bin/clang++ -Wl,--fatal-warnings -Wl,--build-id=md5 -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -Wl,--as-needed -fuse-ld=lld -Wl,--icf=all -Wl,--color-diagnostics -Wl,--no-undefined -Wl,--exclude-libs=libunwind_llvm.a -Wl,--exclude-libs=libc++_static.a -Wl,--exclude-libs=libvpx_assembly_arm.a --target=arm-linux-ohosmusl -Werror -Wl,--warn-shared-textrel -Wl,-O2 -Wl,--gc-sections -Wl,--gdb-index --sysroot=obj/third_party/musl -nostdlib -L../../prebuilts/clang/ohos/linux-x86_64/llvm/lib/arm-linux-ohosmusl/c++ -Lobj/third_party/musl/usr/lib/arm-linux-ohosmusl -L../../prebuilts/clang/ohos/linux-x86_64/llvm/lib/clang/10.0.1/lib/arm-linux-ohosmusl -Wl,--warn-shared-textrel -Bdynamic -Wl,-z,nocopyreloc -pie -o "./exe.unstripped/graphic/graphic_standard/animation_server" obj/third_party/musl/usr/lib/arm-linux-ohosmusl/Scrt1.o obj/third_party/musl/usr/lib/arm-linux-ohosmusl/crti.o -Wl,--start-group @"graphic/graphic_standard/animation_server.rsp" -lunwind ../../prebuilts/clang/ohos/linux-x86_64/llvm/lib/clang/10.0.1/lib/arm-linux-ohosmusl/libclang_rt.builtins.a -lc -lc++ -lc++abi -ldl -lm -Wl,--end-group obj/third_party/musl/usr/lib/arm-linux-ohosmusl/crtn.o
^[[91m[OHOS ERROR]^[[0m ld.lld: ^[[91merror^[[0m: undefined symbol: glEnable
^[[91m[OHOS ERROR]^[[0m >>> referenced by rotation_animation.cpp:47 (../../foundation/graphic/standard/frameworks/animation_server/server/src/rotation_animation.cpp:47)
^[[91m[OHOS ERROR]^[[0m >>> obj/foundation/graphic/standard/frameworks/animation_server/server/src/animation_server/rotation_animation.o:(OHOS::RotationAnimation::Init(OHOS::RotationAnimationParam&))
foundation/graphic/standard/frameworks/animation_server/server/src/rotation_animation.cpp:47)
^[[91m[OHOS ERROR]^[[0m >>> obj/foundation/graphic/standard/frameworks/animation_server/server/src/animation_server/rotation_animation.o:(OHOS::RotationAnimation::Init(OHOS::RotationAnimationParam&)) 使用nm -D 或者 objdump -tT 确定 glEnable 在哪个库文件中定义
- nm -D libGLESv2.so.2 |grep glEnable
- 000068fc T glEnable
- 00006918 T glEnableVertexAttribArray
- 00006934 T glEnablei
然后修改配置foundation/graphic/standard/frameworks/animation_server/BUILD.gn，增加对应的依赖，
--- a/frameworks/animation_server/BUILD.gn
+++ b/frameworks/animation_server/BUILD.gn
@@ -116,6 +116,7 @@ ohos_executable("animation_server") {
"//foundation/graphic/standard:libwmservice",
"//foundation/graphic/standard/utils:libgraphic_utils",
"//foundation/multimodalinput/input/frameworks/proxy:libmmi-client",
+ "//device/hihope/hardware/gpu:mali-bifrost-g52-g2p0-wayland",
]
part_name = "graphic_standard" 编译成功。
6）刷机进入系统后图形起不来
在终端执行ps -ef|grep weston，如果没有weston，即weston没有起来，如下：
原因则是weston.cfg配置中没有加入export LIBGL_DRIVERS_PATH /system/lib环境变量。
如果出现如下：
- # ps -ef |grep weston
- root 238 1 11 12:46:17 ? 00:00:22 weston -c /system/etc/weston.ini -B drm-backend.so --tty=1 --use-pixman
- root 782 286 8 12:49:47 ttyFIQ0 00:00:00 grep weston
最终定位到third_party/weston/weston.cfg 配置问题，weston服务启动时不能添加--use-pixman参数，如果有该参数，需要删除该参数，一下是基于RK分支代码weston的修改：
--- ../22-01-30_rk-bak/third_party/weston/weston.cfg 2022-01-30 15:37:09.000000000 +0800
+++ third_party/weston/weston.cfg 2022-02-22 09:51:33.688896864 +0800
@@ -14,6 +14,8 @@
"export XKB_CONFIG_EXTRA_PATH /etc/xkb",
"mkdir /data/weston",
"chmod 777 /data/weston",
+ "chmod 777 -R /dev/dri/*",
+ "export LIBGL_DRIVERS_PATH /system/lib",
"start weston",
"trigger weston_start",
"sleep 2" 参考文献：
OpenHarmony适配开源图形驱动（旧框架）--RK3568
开源操作系统OpenHarmony就要搭配开源图形驱动Mesa
OpenHarmony开源图形驱动SIG成立&Mesa使能树莓派开发板GPU渲染