1.1.1. Introduction 

           BPI platform MUST upgrade to Linux Kernel 6.6 so that device has latest security patches and kernel capabilities and align with Yocto 5.0 upgrade requirement. 

1.1.2. List of changes

S.No Lists of PR  Reason
1 https://github.com/rdkcentral/meta-cmf-bananapi/pull/240/commits Initial PR to bring up board with mp4 release
2 https://github.com/rdkcentral/meta-cmf-bananapi/pull/263  Device hang issue
3 https://github.com/rdkcentral/meta-cmf-bananapi/pull/293 Recreation of comcast patches and updated srcrev in rdk-wifi-libhostap to support MP4.2 release
4 https://github.com/rdkcentral/rdk-wifi-hal/pull/425 Addressed build issues of rdk-wifi-hal wrt to update of rdk-wifi-hostap srcrev
5 https://github.com/rdkcentral/meta-cmf-bananapi/pull/299 Device is rebooting continuously after Factory Reset on kernel 6.6 Image
6 https://code.rdkcentral.com/r/c/rdkcmf/manifests/+/122407

BPI manifest update to support MP 4.2 release

1.1.3. BPI-R4 build instruction 

1.1.3.1. Controller build steps

Ctrl 
repo init -u https://code.rdkcentral.com/r/manifests -b kirkstone -m rdkb-bpi-extsrc.xml

repo sync -j`nproc` --no-clone-bundle

#with EasyMesh 
MACHINE=bananapi4-rdk-broadband FEATURE_TYPE=EasyMesh source meta-cmf-bananapi/setup-environment-refboard-rdkb
#without Easymesh
MACHINE=bananapi4-rdk-broadband source meta-cmf-bananapi/setup-environment-refboard-rdkb

Bring bpi-r4_sdmmc_bl2.img, bpi-r4_sdmmc_fip.bin, bpi-r4_sdmmc_bl2_B.img and bpi-r4_sdmmc_fip_B.bin files under downloads directory
Please refer the Bootloader steps to download the bl2 and fip binaries  

#to CP the below change for cli access for utopia component
https://github.com/rdkcentral/utopia/pull/140
 
bitbake rdk-generic-broadband-image

Note - Kernel6-6 builds only supports SDcard images and does not have NAND images support yet

1.1.3.2. Extender build steps

Ext 
repo init -u https://code.rdkcentral.com/r/manifests -b kirkstone -m rdkb-bpi-ap-extsrc.xml
repo sync -j4 --no-clone-bundle

#Default build with AL_SAP
MACHINE=bananapi4-rdk-broadband-ap-extender source meta-cmf-bananapi/setup-environment-refboard-rdkb

Bring bpi-r4_sdmmc_bl2.img, bpi-r4_sdmmc_fip.bin, bpi-r4_sdmmc_bl2_B.img and bpi-r4_sdmmc_fip_B.bin files under downloads directory
Please refer the Bootloader steps to download the bl2 and fip binaries

bitbake rdk-generic-ap-extender-image

1.1.3.3. Bootloader steps

#to download the bl2.img, bl2_B.img, fip.bin and fip_B.bin, please use below command
wget  https://artifactory.rdkcentral.com/artifactory/RDKB-Platform/BPI-R4/uboot-2025.01/bpi-r4_sdmmc_bl2_B_6-6.img  https://artifactory.rdkcentral.com/artifactory/RDKB-Platform/BPI-R4/uboot-2025.01/bpi-r4_sdmmc_fip_B_6-6.bin https://artifactory.rdkcentral.com/artifactory/RDKB-Platform/BPI-R4/uboot-2025.01/bpi-r4_sdmmc_bl2_6-6.img  https://artifactory.rdkcentral.com/artifactory/RDKB-Platform/BPI-R4/uboot-2025.01/bpi-r4_sdmmc_fip_6-6.bin
# If you don't have access to above resources, 
# Please follow instruction in https://wiki.rdkcentral.com/pages/viewpage.action?pageId=354648448#SDMonoliticimagebuildandflashingstepsforBPIR4.-Buildingbl2.imgandfip.binincaseofnothavingaccesstoartifactoryrepository to build bl2 and fip binaries yourselves

1.1.4. Flashing instructions(SD card)

flashing prodecure 
Copy *.wic.bz2 from build machine (image path is ~/build-bananapi4-rdk-broadband/tmp/deploy/images/bananapi4-rdk-broadband/)

bzip2 -d <Path to ImageName.wic.bz2>
sudo -E bmaptool copy --nobmap <Path to ImageName.wic> <Path to SD card device file>

1.1.5. References

https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/refs/heads/master/autobuild/unified/#wi_fi-7-latest-release-version-filogic-880_860_850-wifi7-mp4_2-release-2025_09_12-wifi-package-version

Feature validation : Kernel 6.6 migration in Banana pi R4 - Features supported

Jira :

RDKBACCL-850 - Getting issue details... STATUS

RDKBACCL-1169 - Getting issue details... STATUS

RDKBACCL-1179 - Getting issue details... STATUS

CMFSUPPORT-3456 - Getting issue details... STATUS



1.1.6.  Steps to update the OneWifi, rdk-wifi-hal and any other dependent binaries without upgrading to the new build.

  1. To get the updated onewifi binaries from below path,

                         ~/build-bananapi4-rdk-broadband/tmp/work/cortexa53-rdk-linux/ccsp-one-wifi/*/image/usr/bin

        2. To get the updated rdk-wifi-hal library from below path,

                          ~/build-bananapi4-rdk-broadband/tmp/work/cortexa53-rdk-linux/rdk-wifi-hal/*/image/usr/lib

        3. To get the updated libwebconfig library from below path,

                          ~/build-bananapi4-rdk-broadband/tmp/work/cortexa53-rdk-linux/ccsp-one-wifi-libwebconfig/*/image/usr/lib 

        4. To get the updated unified-wifi-mesh binaries(i,e ctrl and agent) from below path,

                          ~/build-bananapi4-rdk-broadband/tmp/work/cortexa53-rdk-linux/unified-wifi-mesh/*/image/usr/bin

        5. To get the updated cli library from below path,

                            ~/build-bananapi4-rdk-broadband/tmp/work/cortexa53-rdk-linux/unified-wifi-mesh/*/image/usr/lib

        6. To get the updated cli binary from below path,

                             ~/build-bananapi4-rdk-broadband/tmp/work/cortexa53-rdk-linux/unified-wifi-mesh-cli/1.0-r0/image/usr/bin

Note : Copy these required libraries/binaries to target device and restart the required systemd service / reboot the device to take the impact .











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