topic Re: Custom board based on LS1028 DDR Bring-up procedure guide in Layerscape

Custom board based on LS1028 DDR Bring-up procedure guide

pb3 — Tue, 10 Sep 2024 09:18:08 GMT

Hi, is there any guide on how to bring up custom DDR memory on LS1028A SoC based device?

I was googling but haven't found anything related to LS1028A. One more question - why does LX2160a NXP need something like fip-ddr? What's the purpose of this? Is it used to DDR training phase? Is it required on LS1028A?

Re: Custom board based on LS1028 DDR Bring-up procedure guide

LFGP — Wed, 11 Sep 2024 14:26:34 GMT

Dear Patryk,

You could manually modify the ddr_init.c file , please read the chapter " 4.2.1.1 TF-A DDR Driver" into the LLDP_6.1.55 user guide,

or you could use QCVS tool to get the respected file, please follow to the next link

https://www.nxp.com/docs/en/user-guide/QCVS_DDR_User_Guide.pdf

Re: Custom board based on LS1028 DDR Bring-up procedure guide

LFGP — Wed, 11 Sep 2024 14:38:57 GMT

regarding your questions:
Each platform needs to define a function _init_ddr which is in a board-specific file,
The _init_ddr function calls dram_init which calls the NXP DDR drivers initialization/training routine.
This function can also be used to apply DDR errata, which needs to be applied post DDR configuration.
It is the same concept for LX2 platforms but they use a binary image file according to the TFA version.