There is no problem with i.MX53 VPU so far.
But after few modifications applied, VPU stopped returning decode completion flag.
Mod#1: modified stream data write process as following
Before: seamless data write to the frame buffer
After: write data to the each frame buffer respectively
Mod#2: modified bus access cycle setting
Can i.MX53 VPU decode buffered data which include no next frame header?
If someone solved this issue, please let me know.