VIM1S SDK for DDR3 Hardware

Hi Team,

I have used VIM1S (S905Y4) schematics to create the custom board with DDR3 instead of DDR4.

I need your help to understand the required boot loader and kernel changes to change from DDR4 to DDR3.

Kindly Advice ?

Regards,
Stalin

Hello @ysn_yaga

We don’t suggest you to change the DDR type, it need well tuning and we can’t provide the support of this part.

We never tested DDR4, but you can try this way:

  1. Copy this timing to VIM1S timing
  2. Uncomment this line to enable DDR3 timing

Hi @numbqq

  1. Is there any dependency on CONFIG_DDRFW_TYPE flag ?
  2. Does linux kernel detect DDR3 / DDR4 automatically or need to change the kernel source as well ?
    Regards,
    Stalin