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【米尔MYS-8MMX开发板免费试用】+3.构建myir镜像,编译kernel源代码，编译libdrm源代码

2021-8-10 16:00:30 4300 米尔开发板试用

0 本帖最后由 xble 于 2021-8-11 08:59 编辑构建myir镜像 1.1编译环境搭建尝试过ubuntu20.04，但是编译不通过，现在想想可能是git的设置不对，后面有时间验证一下。目前可用编译环境，ubuntu18.04，安装编译yocto必要组件： sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat cpio python python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev pylint3 xterm 复制代码 1.2源代码下载参考米尔提供的文档下载即可，百度网盘也好，github也好，各种慢，最终购买百度会员，才算彻底解决下载问题。 1.3编译过程进入mys-8mmx-yocto目录，执行如下命令，可以从github下载，编译。 DISTRO=fsl-imx-xwaylandMACHINE=mys-8mmxsourcesources/meta-myir/tools/myir-setup-release.sh-bbuild-xwayland bitbakemyir-image-full--runall=fetch 复制代码也可以先下载downloads压缩包，然后在执行命令： bitbakemyir-image-full bitbakemyir-image-core 复制代码 1.4TF卡方式运行烧录可以直接启动的TF卡，要求至少8G，使用DiskGenius工具初始化TF卡；使用Win32DiskImager工具烧录，烧录img：myir-image-core-mys-8mmx-20210810013041.rootfs.sdcard.bz2（例子）。将开发板拨码开关设置为TF卡启动模式： 1.5运行结果这是我编译后的一个版本的运行log，注意字符串“42412ab2f9dc ”，她代表kernel的git commit ID，也是yocto编译linux kernel的唯一标志。 Linux version 5.4.3-2.0.0+g42412ab2f9dc (oe-user@oe-host) (gcc version 9.2.0 (GCC)) #1 SMP PREEMPT Mon Aug 9 09:39:13 UTC 2021 ..... [ 0.932372] [drm] [drivers/gpu/drm/drm_drv.c 1142] drm_core_init 复制代码编译kernel源代码 2.0编译kernel安装必要组件 sudo apt-get install git fakeroot build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison 复制代码 2.1kernel源代码下载 git clone https://github.com/MYiR-Dev/myir-imx-linux.git -b develop 2.2修改kernel编译开关 vim sources/meta-myir/meta-bsp/recipes-kernel/linux/linux-imx_5.4.bb 2.3drm驱动源代码修改 vim drivers/gpu/drm/drm_drv.c static int __init drm_core_init(void) { int ret; DRM_INFO("[%s %d] drm_core_initn", __FILE__, __LINE__); drm_connector_ida_init(); DRM_INFO("[%s %d] drm_core_initn", __FILE__, __LINE__); idr_init(&drm_minors_idr); DRM_INFO("[%s %d] drm_core_initn", __FILE__, __LINE__); ret = drm_sysfs_init(); if (ret < 0) { DRM_ERROR("Cannot create DRM class: %dn", ret); goto error; } DRM_INFO("[%s %d] drm_core_initn", __FILE__, __LINE__); drm_debugfs_root = debugfs_create_dir("dri", NULL); ret = register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops); if (ret < 0) goto error; DRM_INFO("[%s %d] drm_core_initn", __FILE__, __LINE__); drm_core_init_complete = true; DRM_INFO("[%s %d] drm_core_initn", __FILE__, __LINE__); DRM_DEBUG("Initializedn"); return 0; error: drm_core_exit(); return ret; } 复制代码注意每次修改kernel代码后需要git commit提交，git commit ID需要写入上述 linux-imx_5.4.bb文件相应位置。 2.4kernel源代码编译 bitbake -c cleansstate virtual/kernel bitbake virtual/kernel 2.5kernel源代码运行查看运行log，与源代码对比一下，看看代码是否成功运行。编译libdrm源代码 3.1修改libdrm编译开关 vim meta-myir/meta-bsp/recipes-graphics/drm/libdrm_2.4.99.imx.bb require recipes-graphics/drm/libdrm_2.4.91.imx.bb #FILESEXTRAPATHS_prepend := "${BSPDIR}/sources/meta-freescale/recipes-graphics/drm/${BPN}:" #LIC_FILES_CHKSUM = "file://xf86drm.c;beginline=9;endline=32;md5=c8a3b961af7667c530816761e949dc71" #IMX_LIBDRM_BRANCH = "libdrm-imx-2.4.99" #SRC_URI_remove = "file://installtests.patch" #SRCREV = "f421c9c8c4b8fe48d9e6ef43910e98569c94a4b2" 复制代码 vim sources/meta-freescale/recipes-graphics/drm/libdrm_2.4.91.imx.bb "Direct Rendering Infrastructure" (DRI). DRI is required for many hardware accelerated OpenGL drivers." HOMEPAGE = "http://dri.freedesktop.org" SECTION = "x11/base" LICENSE = "MIT" LIC_FILES_CHKSUM = "file://xf86drm.c;beginline=9;endline=32;md5=c8a3b961af7667c530816761e949dc71" PROVIDES = "drm" DEPENDS = "libpthread-stubs libpciaccess" IMX_LIBDRM_SRC ?= "git://///home/xble/imx8mm/libdrm-2.4.100;protocol=file" IMX_LIBDRM_BRANCH = "libdrm-2.4.100" SRC_URI = "${IMX_LIBDRM_SRC};branch=${IMX_LIBDRM_BRANCH} " SRCREV = "7fc860214f1915807162ae3082449f60826f3cf3" S = "${WORKDIR}/git" DEFAULT_PREFERENCE = "-1" inherit autotools pkgconfig manpages EXTRA_OECONF += "--disable-cairo-tests --enable-omap-experimental-api --enable-etnaviv-experimental-api --enable-install-test-programs --disable-valgrind " PACKAGECONFIG[manpages] = "--enable-manpages, --disable-manpages, libxslt-native xmlto-native" ALLOW_EMPTY_${PN}-drivers = "1" PACKAGES =+ "${PN}-tests ${PN}-drivers ${PN}-radeon ${PN}-nouveau ${PN}-omap ${PN}-intel ${PN}-exynos ${PN}-kms ${PN}-freedreno ${PN}-amdgpu ${PN}-etnaviv" RRECOMMENDS_${PN}-drivers = "${PN}-radeon ${PN}-nouveau ${PN}-omap ${PN}-intel ${PN}-exynos ${PN}-freedreno ${PN}-amdgpu ${PN}-etnaviv" FILES_${PN}-tests = "${bindir}/" FILES_${PN}-radeon = "${libdir}/libdrm_radeon.so." FILES_${PN}-nouveau = "${libdir}/libdrm_nouveau.so." FILES_${PN}-omap = "${libdir}/libdrm_omap.so." FILES_${PN}-intel = "${libdir}/libdrm_intel.so." FILES_${PN}-exynos = "${libdir}/libdrm_exynos.so." FILES_${PN}-kms = "${libdir}/libkms.so." FILES_${PN}-freedreno = "${libdir}/libdrm_freedreno.so." FILES_${PN}-amdgpu = "${libdir}/libdrm_amdgpu.so." FILES_${PN}-etnaviv = "${libdir}/libdrm_etnaviv.so." PACKAGES_prepend_imxgpu = "${PN}-vivante " RRECOMMENDS_${PN}-drivers_append_imxgpu = " ${PN}-vivante" FILES_${PN}-vivante = "${libdir}/libdrm_vivante.so." PACKAGE_ARCH = "${MACHINE_SOCARCH}" 复制代码 3.2源代码修改 libdrm/tests/modetest/modetest.c中2012行添加如下代码，行号与运行log对应，以源代码中的行号为准。修改太多不一一列出。 fprintf(stderr, "[%s %d] device[0]=%s module[imx-drm]=%sn", __FILE__, __LINE__, device, module); 复制代码 3.3libdrm源代码编译 bitbake -c cleansstate drm;bitbake drm 3.4modetest测试程序运行将编译好的bin文件等其他文件一起拷贝到tf卡对应位置。如果接入HMDI则可以看到如下类似图形，彩色渐变斜条纹。也可以直接看到log，如下： modetest -M imx-drm -D 0 -s 35@33:1920x1080 -P 31@33:1920x1080 -Ftiles plane->format_str=XR24 [../../../git/tests/modetest/modetest.c 2012] device[0]=0 module[imx-drm]=imx-drm [ 52.186489] lt8912 1-0048: failed to get display timings from EDID [../../../git/tests/modetest/modetest.c 2065]dev.use_atomic=0 [../../../git/tests/modetest/modetest.c 2144] [count==1] count=1 [../../../git/tests/modetest/modetest.c 1482]setting mode 1920x1080-60Hz@XR24 on connectors 35, crtc 33 failed to set gamma: Function not implemented [../../../git/tests/modetest/modetest.c 2148] [plane_count==1] plane_count=1 testing 1920x1080@XR24 overlay plane 31 testing 1920x1080@XR24 overlay plane 31 [../../../git/tests/modetest/modetest.c 2152] [test_cursor==0] test_cursor=0 [../../../git/tests/modetest/modetest.c 2156] [test_vsync==0] test_vsync=0 [../../../git/tests/modetest/modetest.c 2160] [drop_master==0] drop_master=0 复制代码记得git提交和git commit ID修改到编译开关设置中。修改uboot编译米尔默认uboot源代码有问题，无法启动，需要进行如下修改： vim sources/meta-myir/meta-bsp/recipes-bsp/u-boot/u-boot-common.inc UBOOT_SRC ?= "git:////home/xble/imx8mm/myir-imx-uboot;protocol=file" SRCBRANCH = "develop" SRC_URI = "${UBOOT_SRC};branch=${SRCBRANCH} " SRCREV = "8098fd617e45c05773bc7c554ee4169fdec29b1b" 复制代码总结原来计划这个章节放到drm框架里面，但是后面才慢慢意识到yocto框架的“限制”，当然这种限制其实就是不能熟练使用yocto而已，如果熟悉了应该也比较简单，我这里把这些编译方法单列一章。 0
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