Hi JHY
this (unfinished comment) was fixed in latest L3.0.101_4.1.1 release:
ENGR00320182 [iMX6DQ/iMX6DL] Fix bug in DLL off mode code in DDR3 frequency change procedure
L3.0.101_4.1.1_SOURCE_BSP
: i.MX 6Quad, i.MX 6Dual, i.MX 6DualLite, i.MX 6Solo and i.MX 6Sololite Linux BSP Source Code Files.
Best regards
igor
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