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For dac validation we need dobby, crun and dsm functionalities in the BPIR4 device. So all mentioned functionality has been brought to BPIR4 platform by including "dac" distro feature into the build, for reference you follow mentioned jira.

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OCI image generation is specifically for broadband application developers, in which they can create their application irrespective of platform. That image will be compatible with all the platforms but only difference is they developer need to define the arch of the platform like 32 bit or 64 bit.
Generic meta layer for the generation of OCI image will meta-dac-sdk-broadband meta layer.(https://github.com/rdkcentral/meta-dac-sdk-broadband)
Build instructions are mentioned below for oci image generation, as of now we are offering "iperf3 application" in meta-dac-sdk-broadband. For any query you can refer mentioned jira.

#Following repo commands will required meta-layers see manifest of https://code.rdkcentral.com/r/plugins/gitiles/manifests/+/refs/heads/rdk-next/rdkb-extsrc.xml 
1)repo init -u https://code.rdkcentral.com/r/rdkcmf/manifests -m rdkb-extsrc.xml -b kirkstone   


#execute the below command to clone the meta-dac-sdk-broadband and bitbake 
2)sed -i '/oe-layers.xml/a  \ \ \ \ <project name="rdkcentral/meta-dac-sdk-broadband" remote="github" path="meta-dac-sdk-broadband" revision="main" /> \n\ \ \ \ <project name="yoctoproject/poky" remote="github" path="." revision="1e0d58c53b7d9c3feb631e46666ae7a3e3614253" upstream="kirkstone"/>' .repo/manifests/rdkb-extsrc.xml 

#Below command to sync all the code to the folder.  
3)repo sync -j `nproc` --no-clone-bundle --no-tags   


# cherrypick the below link to overcome the old syntax override issue with bitbake 
4)cd bitbake && git fetch https://code.rdkcentral.com/r/rdk/components/opensource/oe/bitbake refs/changes/35/85335/3 && git cherry-pick FETCH_HEAD && cd ..   

5). ./oe-init-build-env  #Command used for setting up build folder. 
6)cp ../meta-dac-sdk-broadband/manifests/bblayers.conf conf/ 
7)echo 'MACHINE = "raspberrypi4-64"' >> conf/local.conf # This step is used to differentiate the arch where BPIR4 supports 64 bit arch by default.        


# Building Iperf DAC app 
8)bitbake dac-image-iperf3

Bundle Creation.

After OCI image gets generated we need to generate bundlegen for the generated oci image to make that application platform compatible. (https://github.com/rdkcentral/BundleGen.git)
For BPIR4 we are having below mentioned templates.
            1)bpir4_reference.json
            2)bpir4_reference_libs.json
Before generating bundlegen make sure that you are having supported packages in your local machine(linux machine) for bundlegen support, follow bellow mentioned wiki for installing bundlegen supported packages .
Containerization using META DAC SDK in RDK-B RPI#,Install%20Bundlegen%20in%20a%20VM%20or%20any%20host%20machine,-Reference%20%3A%20Containerization 

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         Bundlegen Jira for reference
         

DAC

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validation.

     In BPIR4 dac application can be installed and validated in 2 ways:
        1)Using USP-Pa.
        2) Manual validation ( By copying oci bundle to bpir4 device).
    Mentioned validation steps are included      Dac functionality validation for bpir4 can be found in below mentioned jira.