Enabling single-DIMM operations in the secondary DIMM slot

NXP LX2160
1

I am in possession of a LX2160A CEx7 CoM with a broken primary DIMM slot.

Firmware images fail to boot with a DIMM in the secondary DIMM slot, because there is a bug after disabling the first DDR controller in the upstream ATF-A NXP DDR code.

I have opened an issue with ATF-A here nxp ddr: Unused first DDRC is disabled improperly · Issue #144 · TrustedFirmware-A/trusted-firmware-a · GitHub , outlining the problem and the solution (a single-line change).

The slightly clumsy way of applying the change is to clone

Then running an arbitrary build once.

Then change in build/atf/drivers/nxp/ddr/nxp-ddr/utility.c line 147 from

priv->phy[0] = priv->phy[0];

to

priv->phy[0] = priv->phy[1];