Commit Graph

2 Commits

Author SHA1 Message Date
Ye Li
8f9f6ba855 imx8m: ddr: Disable CA VREF Training for LPDDR4
Users reported LPDDR4 MR12 value is set to 0 during PHY training,
not the value from FSP timing structure, which cause compliance test failed.
The root cause is the CATrainOpt[0] is set to 1 in 2D FSP timing
but not set in 1D.  According to PHY training application node,
to enable the feature both 1D and 2D need set this field to 1,
otherwise the training result will be incorrect.
The PHY training doc also recommends to set CATrainOpt[0] to 0 to use
MR12 value from message block (FSP structure). So update the LPDDR4
scripts of all mscale to clear CATrainOpt[0].

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-04-08 09:18:29 +02:00
Ye Li
98bcdf1635 imx8mn: Add low drive mode support for DDR4/LPDDR4 EVK
Add dedicated defconfigs for iMX8MN low drive mode which set the VDD_SOC
and VDD_DRAM to 0.8v, DDR at 1600MTS (800Mhz clock) and GPU at 200Mhz.

Signed-off-by: Ye Li <ye.li@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-04-08 09:18:29 +02:00