Details about working with the YOCTO build for Vaaman

YOCTO-vaaman.md

YOCTO Local Source -

Can be accessed via - ssh pratiksha@galactos.local

/home/pratiksha/hdd/pratiksha/kshitij/vicharak-linux-sdk/yocto

YOCTO Git repos -

meta rockchip - https://github.com/vicharak-in/meta-rockchip

rockchip-kernel - https://github.com/vicharak-in/rockchip-linux-kernel-priv

commit id - cbb5086a42d23f7d4485c71048a5df4ad1056686

Code to be added to build/conf/local.conf

MACHINE ??= "qemux86-64"  
MACHINE ?= "rk3399-vaaman"  
INIT_MANAGER = "systemd"  
IMAGE_INSTALL:append = "kernel-modules"  
IMAGE_INSTALL:append = " linux-rockchip-overlays"  
LICENSE_FLAGS_ACCEPTED += "commercial"  
IMAGE_INSTALL:append = " kernel-modules mpg123 alsa-lib alsa-utils alsa-plugins pulseaudio pulseaudio-server pulseaudio-misc v4l-utils"  
DISTRO_FEATURES:append = " alsa"  
PACKAGECONFIG:pn-mpg123 = "pulseaudio"  
ROOTFS_POSTPROCESS_COMMAND += " \  
   install -d ${IMAGE_ROOTFS}/boot/extlinux; \  
   install -m 0644 ${DEPLOY_DIR_IMAGE}/extlinux.conf ${IMAGE_ROOTFS}/boot/extlinux/extlinux.conf; \  
"  
IMAGE_INSTALL:append = " u-boot-rockchip-extlinux"  
  
IMAGE_BOOT_FILES = "Image rk3399-vaaman-linux--6.1-r0-rk3399-vaaman-20250709061407.dtb:rk3399-vaaman.dtb extlinux.conf"

Added code in u-boot-rockchip.bb

do_install:append() {
    install -d ${D}/boot/extlinux
    if [ -f ${DEPLOYDIR}/extlinux.conf ]; then
        install -m 0644 ${DEPLOYDIR}/extlinux.conf ${D}/boot/extlinux/extlinux.conf
    fi
}

FILES:${PN} += "/boot/extlinux/extlinux.conf"

Commands to trigger the YOCTO build

1. In the directory -> /home/pratiksha/hdd/pratiksha/kshitij/vicharak-linux-sdk/yocto, run the command source oe-init-build-env
2. You should automatically cd into the build directory. Add the lines mentioned above in the /conf/local.conf file.
3. Run the command -> bitbake core-image-full-cmdline to automatically trigger the build.

HOW TO ADD KERNEL PATCHES TO THE YOCTO BUILD

Should you wish to debug something at the kernel level via kernel patches, follow these steps to apply the same to the YOCTO build.

1. Generate your patch in the following format -> 000x-<short_description_of_changes>.patch
2. place it in the following directory -> /home/pratiksha/hdd/pratiksha/kshitij/vicharak-linux-sdk/yocto/meta-rockchip/recipes-kernel/linux/files
3. Add the patch path to the .bb file (like linux-rockchip_6.1.bb) ->

1.SRC_URI = " \  
       git://github.com/vicharak-in/rockchip-linux-kernel-priv.git;protocol=https;nobranch=1;branch=vicharak-6.1; \  
       file://${THISDIR}/files/rk3399_vaaman.cfg \  
       file://${THISDIR}/files/cgroups.cfg \  
       file://${THISDIR}/files/ext4.cfg \  
file://${THISDIR}/files/0001-ARM64-configs-vaaman-Enable-RTL8822CS-Wi-Fi-driver.patch \  
file://${THISDIR}/files/0002-rk3399-vaaman.dtsi-Added-Support-for-Audio-Codec.patch \  
file://${THISDIR}/files/0003_enable_camera_node_via_dtsi.patch \  
file://${THISDIR}/files/000x-<short_description_of_changes>.patch \  
"