[U-Boot] u-boot: raspberry pi 4 with 4G ram, bdinfo: dram bank size is < 1G

[Matthias Brugger]

On 25/09/2019 11:51, Matthias Brugger wrote:
> Hi,
> 
> On 19/09/2019 13:51, Pi NewBie wrote:
>> With top of the tree(tot) uboot, and tot firmware, uboot command bdinfo
>> shows the dram bank size as 0x000000003b400000 which is <1G, but the
>> rpi4 board has 4G of ram.
>>
>> However with kernel8.img in the firmware, linux kernel shows in /proc/meminfo
>>
>> cat /proc/meminfo
>>
>> MemTotal:3999784 kB
>>
>> MemFree: 3868044 kB
>>
>> MemAvailable:3819600 kB
>>
>>
>> Does this current uboot does not yet support rpi with 4g ram?
>>
> 
> Can you try with this patch:
> https://patchwork.ozlabs.org/patch/1159868/
> 
> Background: I think you need to change the config to CONFIG_NR_DRAM_BANKS=2
> 
> Happy to hear back from you.
> 

For the record: with this patch applied I can see both DRAM banks on my 4GB RPi4:
DRAM bank   = 0x0000000000000000
-> start    = 0x0000000000000000
-> size     = 0x000000003e000000
DRAM bank   = 0x0000000000000001
-> start    = 0x0000000040000000
-> size     = 0x00000000bc000000

Regards,
Matthias

> Regards,
> Matthias
> 
>>
>> -Thanks
>>
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