U-boot 2026-07-bpi r4pro 8GB total 3 GiB

Banana Pi Router design BPI-R4/BPI-R4 Pro(MT7988)
1

Hi,

so i am testing the 2026-07-bpi uboot with the r4pro

I copied from @frank-w lastest CI build bpi-r4pro_sdmmc_8GB_fip.bin & bpi-r4pro_sdmmc_8GB_bl2.img

sudo dd if=bpi-r4pro_sdmmc_8GB_fip.bin bs=1M status=progress conv=notrunc,fsync of=/dev/mmcblk0p4

& sudo dd if=bpi-r4pro_sdmmc_8GB_bl2.img bs=1M status=progress conv=notrunc,fsync of=/dev/mmcblk0p1

the result is that although 8G DRAM is identified i only get 3GB

NOTICE:  BL2: v2.14.0(release):5ef7f379-bpi-r4pro-sdmmc
NOTICE:  BL2: Built : 23:51:59, May 27 2026
NOTICE:  WDT: [40000000] Software reset (reboot)
NOTICE:  CPU: MT7988
NOTICE:  EMI: DDR4 4BG mode
NOTICE:  EMI: Using DDR unknown settings
NOTICE:  EMI: complex R/W mem test passed
NOTICE:  DRAM: 8192MB
NOTICE:  LVTS: Enable thermal HW reset
NOTICE:  Located partition 'fip' at 0x680000, size 0x200000
NOTICE:  BL2: Booting BL31
NOTICE:  BL31: v2.14.0(release):5ef7f379-bpi-r4pro-sdmmc
NOTICE:  BL31: Built : 23:52:02, May 27 2026


U-Boot 2026.07-rc2-bpi-g20f56ff6d378-dirty (May 27 2026 - 23:50:22 +0000)

CPU:   MediaTek MT7988
Model: Bananapi BPI-R4 Pro
DRAM:  8 GiB (total 3 GiB)
Core:  60 devices, 25 uclasses, devicetree: separate
MMC:   mmc@11230000: 0
Loading Environment from nowhere... OK
In:    serial@11000000
Out:   serial@11000000
Err:   serial@11000000
=> board_late_init...
bootmedia:sd
Net:   MediaTek MT7988 built-in switch

BPI-R4P> printenv ram_gb

ram_gb=8

anything that i missed ?

2

i tried the 2026-04 version and the ram is correctly being identified with 8GB ā€¦ so it seems is an issue with the 2026-07 version @frank-w ?

3

I flashed 2026-07-rc2 yesterday for r4pro and did not noticed an error,but not looked close to ram detection. Iā€™m away from my board next days,so cannot test again.

1 Like