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[FAQ] TDA4VL-Q1: How to configure DDR size of 4GB in the J721s2 SDK?

Part Number: TDA4VL-Q1

What are the changes required to be done in the Linux SDK support a DDR of size 4GB?

  • The SDK offering for J721s2 currently supports 16GB DDR. 

    In order to make the SDK compatible to a 4GB DDR, please apply the below patch in ${PSDKLA}/board-support/u-boot-2021.01+gitAUTOINC+62a9e51344-g62a9e51344



    1. The above patch is created on SDK 8.6.

    2. Changes regarding the reduction in the DDR instance happens only in the u-boot.

    After applying this patch, build the u-boot binaries and copy the same to the boot partition as shown below:

    cd ${PSDKLA}
    make u-boot_clean
    make u-boot
    sudo cp board-support/k3-image-gen-2022.01/tiboot3.bin /media/nikhil/BOOT/tiboot3.bin
    sudo cp board-support/u-boot_build/a72/tispl.bin /media/nikhil/BOOT/tispl.bin
    sudo cp board-support/u-boot_build/a72/u-boot.img /media/nikhil/BOOT/u-boot.img


    Check the u-boot logs as shown below

    U-Boot 2021.01-00002-g7f1139c55f

    (Apr 26 2023 - 15:38:23 +0530)
    SoC: J721S2 SR1.0 GP
    Model: Texas Instruments J721S2 EVM
    Board: J721S2X-PM1-SOM rev E1
    DRAM: 4 GiB
    Flash: 0 Bytes
    MMC: mmc@4f80000: 0, mmc@4fb0000: 1
    In: serial@2880000