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LPDDR4 channel0 training failed #38

Open olemmela opened 5 years ago

olemmela commented 5 years ago

I tried to use current master and next-dev branches to bringup rockpro64 with 2GB LPDDR4 memory. With both branches channel 0 training failed and channel 1 training passes.

U-Boot TPL 2017.09-02627-g2c9d117912-dirty (Feb 19 2019 - 19:28:16)
Channel 0: LPDDR4, 50MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS=1 Die BW=16 Size=1024MB
Channel 1: LPDDR4, 50MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS=1 Die BW=16 Size=1024MB
256B stride
channel 0 training failed!
channel 1 training pass
change freq to 400 MHz 0, 1
channel 0 training failed!
channel 1 training pass
change freq to 800 MHz 1, 0
Returning to boot ROM...