Hi
Please check at following link
https://drive.google.com/file/d/0B0qEfizitWXlWGJMQ1JCMGd4bHM/view?pli=1
Hello Guo,
Android 4.2.2.1.1 is no longer maintained by us but you can download newer versions of android from the following link:
i.MX6Q|i.MX 6Quad Processors|Quad Core|Freescale
Have a great day,
Sergio
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The latest BSP release is 4.4.3.2 and it was release in February, so it is supported right now.
The next release will be Lollipop (v5.0) though there is still no release date confirmed.