[FAQ] TDA4VM: Reduce the DRAM (DDR) memory of Linux to 1GB

Hi,

The below patch is created and tested on SDk 8.2 to reduce the DDR size of Linux from 4GB to 1GB
Please follow the below steps.
1. Apply the below patch in PSDKLA/board-support/u-boot-2021.01+gitAUTOINC+44a87e3ab8-g44a87e3ab8/ 
/cfs-file/__key/communityserver-discussions-components-files/791/SDK8.2_5F00_Changes_5F00_for_5F00_1GB_5F00_DDR.PATCH.zip

2. go to PSDKLA/ path and build u-boot using below command
     
     make u-boot_clean && make u-boot

3. Copy the below 3 binaries into the BOOT section of the SD Card 
    
    PSDKLA/board-support/u-boot_build/a72/u-boot.img
    PSDKLA/board-support/u-boot_build/a72/tispl.bin
    PSDKLA/board-support/u-boot_build/r5/tiboot3.bin

4. Insert the SD card into EVM and power ON the board.

5. You can confirm from the u-boot logs that the DRAM = 1GB as shown below

U-Boot 2021.01-00001-g435d6f24c6-dirty (Apr 27 2022 - 14:200 +0530)

SoC: J721E SR1.0
Model: Texas Instruments K3 J1E SoC
Board: J721EX-PM2-SOM rev E7
DRAM: 1 GiB
Flash: 0 Bytes
MMC: sdhci@4f80000: 0, sdhci@4fb0000: 1
In: serial@2800000
Out: serial@2800000
Err: serial@2800000
am65_cpsw_nuss etheet@46000000: K3 CPSW: nuss_ver: 0x6BA00101 cpsw_ver: 0x6BA8010ale_ver: 0x00293904 Ports:1 mdio_freq:1000000
Detected: J7X-BASE-CPB rev E3
Detected: J7X-INFOTAN-EXP rev E2
Detected: J7X-VSC8514-ETH rev E2
cdns,sierra serdes@5000000: sierra probed

    
Regards,
Nikhil
    

Note : For J721s2 and other SOCs that does not follow the legacy boot mode, the tiboot3.bin should be taken from ${PSDKLA}/board-support/k3-image-gen-2022.01/tiboot3.bin instead of ${PSDKLA}/board-support/u-boot_build/r5/tiboot3.bin