[BPI-R4] Successfully upgraded 8GB RAM on BPI-R4

Banana Pi Router design BPI-R4(MT7988)
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:smiling_face_with_tear: Sorry，Frank，I didn’t tried it before. The image was provided by liujie, I just help to update here

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I have tested the bl2 img which recompile with modified Makefile and comfirm that add DDR4_4BG_MODE=1 option to Makefile works.

My R4 still detect as 8GB with recompiled bl2 img.

So, only two changes to bl2 is:

1.add 4096 to AVAIL_DRAM_SIZE in dram_configs.mk

2.add DDR4_4BG_MODE=1 option to compile script and recompile.

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Have you test in 4G RAM board？can it work ok?

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I only have one R4 and I completed hardware mod before recompile bl2 & test.

I don’t have another 4GB R4 to test moded bl2, sorry.

Maybe other users can help us test moded bl2?

Here is my moded bl2 which mod from BPI-R4-bsp-6.1:

bl2_bsp.img (240.3 KB)

Bl2 img can flash under ssh using following commands(bl2 img msut upload to /tmp first):

  • echo 0 > /sys/block/mmcblk0boot0/force_ro
  • dd if=/tmp/bl2.img of=/dev/mmcblk0boot0

If R4 can’t boot after reboot, switch to nand boot and use the same method to flash back original bl2.