i.MX8M Plus DDR Calibration failure: PMU Error

[Ajesh_Ametek1]

Hi,

We were trying to calibration for an i.MX8M Plus custom board using Mscale DDR Tool .

We were seeing below issues in one of the boards.

============ Step 1: DDRPHY Training... ============
---DDR 1D-Training @2000Mhz...
PMU10: **** Start LPDDR4 Training. PMU Firmware Revision 0x1007 ****
PMU10: Setting boot clock divider to 40
PMU10: PHY TOTALS - NUM_DBYTES 4 NUM_NIBBLES 8 NUM_ANIBS 10
PMU10: CSA=0x03, CSB=0x03, TSTAGES=0x131F, HDTOUT=5, MMISC=0 DRAMFreq=4000MT DramType=LPDDR4
PMU10: Pstate0 MRS MR01_A0=0xF4 MR02_A0=0x3F MR03_A0=0x33 MR11_A0=0x66
PMU10: Pstate0 MRS MR12_A0=0x48 MR13_A0=0x00 MR14_A0=0x48 MR22_A0=0x16
PMU10: Pstate0 MRS MR01_A1=0xF4 MR02_A1=0x3F MR03_A1=0x33 MR11_A1=0x66
PMU10: Pstate0 MRS MR12_A1=0x48 MR13_A1=0x00 MR14_A1=0x48 MR22_A1=0x16
PMU10: Pstate0 MRS MR01_B0=0xF4 MR02_B0=0x3F MR03_B0=0x33 MR11_B0=0x66
PMU10: Pstate0 MRS MR12_B0=0x48 MR13_B0=0x00 MR14_B0=0x48 MR22_B0=0x16
PMU10: Pstate0 MRS MR01_B1=0xF4 MR02_B1=0x3F MR03_B1=0x33 MR11_B1=0x66
PMU10: Pstate0 MRS MR12_B1=0x48 MR13_B1=0x00 MR14_B1=0x48 MR22_B1=0x16
PMU5: CA bitmap dump for cs 0
PMU5: CAA0 ffffffe000000000000003ffffffffffffffffffffffffff
PMU5: CAA1 fffffff000000000000003ffffffffffffffffffffffffff
PMU5: CAA2 fffffff800000000000000ffffffffffffffffffffffffff
PMU5: CAA3 ffffffe000000000000003ffffffffffffffffffffffffff
PMU5: CAA4 fffffffe000000000000001fffffffffffffffffffffffff
PMU5: CAA5 fffffffe000000000000007fffffffffffffffffffffffff
PMU5: CA bitmap dump for cs 1
PMU5: CAA0 fffffffe000000000000ffffffffffffffffffffffffffff
PMU5: CAA1 ffffffff0000000000003fffffffffffffffffffffffffff
PMU5: CAA2 ffffffff8000000000000fffffffffffffffffffffffffff
PMU5: CAA3 fffffffe0000000000007fffffffffffffffffffffffffff
PMU5: CAA4 fffffffffc000000000003ffffffffffffffffffffffffff
PMU5: CAA5 fffffffff000000000003fffffffffffffffffffffffffff
PMU5: CA bitmap dump for cs 0
PMU5: CAB0 ffffffffe000000000000001ffffffffffffffffffffffff
PMU5: CAB1 ffffffff000000000000007fffffffffffffffffffffffff
PMU5: CAB2 ffffffff000000000000007fffffffffffffffffffffffff
PMU5: CAB3 ffffffff000000000000001fffffffffffffffffffffffff
PMU5: CAB4 ffffffffc00000000000001fffffffffffffffffffffffff
PMU5: CAB5 ffffffff000000000000003fffffffffffffffffffffffff
PMU5: CA bitmap dump for cs 1
PMU5: CAB0 ffffffffff8000000000001fffffffffffffffffffffffff
PMU5: CAB1 fffffffffe000000000000ffffffffffffffffffffffffff
PMU5: CAB2 fffffffff800000000001fffffffffffffffffffffffffff
PMU5: CAB3 fffffffffc000000000003ffffffffffffffffffffffffff
PMU5: CAB4 fffffffffe0000000000007fffffffffffffffffffffffff
PMU5: CAB5 fffffffffc00000000000fffffffffffffffffffffffffff
[Process] End of CA training
[Process] End of initialization
PMU: Error: RxEn training preamble not found
PMU: ***** Assertion Error - terminating *****
[Result] FAILED

Please help us in understanding above error. What could be the reason PMU errors?