This recipe should fetch all the sources from the GIT repo
Example name space for the GIT repo where you should place all the tools like permission files, authentication keys etc - “rdk/devices/<OEM>/<OEM_device>/tools”
Example namespace for the GIT repo to keep all the binaries (crcsum etc) - “rdk/devices/<OEM>/<OEM_device>/bin”
This recipe will have only one task – do_install, which copies all the necessary files to create oem images to staging binary directory
"inherit native" this class would short-circuit all the target build and strip tasks.

Write a bbclass - oem-image.bbclass

Add oem-image-tools as DEPENDS
In this class add a task "create_oem_image" to create the oem specific images - "addtask create_oem_image after do_rootfs before do_build"
Copy all the tools and files needed from STAGING_BINDIR_NATIVE to working directory, which were copied by <oem>-image-tools-native.bb
Once copied this task will have the logic to create the custom oem images
After creating the custom oem images, copy them to DEPLOY_DIR_IMAGE
In recipe add "create_oem_image[nostamp] = "1"", this allows task to run every-time on every run of bitbake.
Add create_oem_image[depends] += "${PN}:do_rootfs" to make sure the do_rootfs task is re-run every time before executing the task - create_oem_image.
Make this class inherit by all the rdk image recipes,
rdk-generic-mediaserver-image.bbappend: inherit oem-image,comcast-mediaclient-image.bbappend:inherit oem-image,comcast-hybrid-image.bbappend:inherit oem-image,rdk-generic-hybrid-image.bbappend:inherit oem-image, core-image-minimal.bbappend:inherit oem-image,rdk-generic-image.bbappend:inherit oem-image,rdk-generic-mediaclient-image.bbappend:inherit oem-image.

Adding a new SoC/OEM to RDK

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Creating packages for building images

Create a custom package-group for the SoC/OEM which shall list all the recipes that are required for

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meta-rdk-soc-broadcom/meta-brcm/recipes-core/packagegroups/packagegroup-rdk-mediaserver.bbappend
Code BlockRDEPENDS_packagegroup-rdk-generic-mediaserver += "\ gstqamtunersrc-brcm \ "the image.
Create a custom image for generating RFS for required SoC/OEM.

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meta-rdk-<soc>/recipes-core/images/<soc>-hybrid-image.bb
Code BlockIMAGE_INSTALL += "\ packagegroup-rdk-baserootfs \ packagegroup-rdk-<soc/oem specific packages> \ "

All the components are built using individual recipes. There shall be a main image recipe (example , rdk-generic-image) which includes all other required recipe and create the final RFS
Package groups recipe is one support a image recipe to select the set of packages
The recipes will be called in sequence
(1) opensource components
(2) Kernel
(3) SDK
(4) RDK
(5) MSO
(6) Packaging and create final image.
The final linux and RFS image will be created under build_folder/tmp/deploy/images