Attention is currently required from: Paul Menzel.
2 comments:
Commit Message:
Patch Set #3, Line 9: devices
Are these the memory chips (“modules”). […]
I have added it.
As you are editing a hex file, what values/options are you changing? Where did you get these from? […]
Following values were adjusted according to this board characteristic and with help of Serial Presence Detect (SPD) for LPDDR3 and LPDDR4 SDRAM Modules JEDEC Spec and the Specification for this Micron modules itself:
SPD Byte 4 – only 4Gb density instead of 8Gb for mc_ehl1
SPD Byte 5 – different Row and Column Address Bits
SPD Byte 29/30 – 4Gb LPDDR4 needs 130ns tRFCab
SPD Byte 31/32 – 4Gb LPDDR4 needs 60ns tRFCpb
...and yes, with the mc_ehl1 settings the board didn’t boot.
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