Hi xuhui
for new board it is necessary to run ddr test and find new calibration
settings, change uboot ../mx6sabresd/mx6q_4x_mt41j128.cfg with new
settings and rebuild uboot
i.MX6/7 DDR Stress Test Tool V2.52 | NXP Community
If board still not boots, attach jtag and check boot settings in register
SRC_SBMR1,2. Also please check Chapter 8 Avoiding Board Bring-up Problems
i.MX6 System Development User’s Guide
http://cache.freescale.com/files/32bit/doc/user_guide/IMX6DQ6SDLHDG.pdf
Best regards
igor
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