Hi Ding Yan,
The cameras our i.MX6SDP demo board supporting are ov5640 and ov5642.
But you maybe cannot buy the camera module easily.You can reference the next website purchase the sensor and make connector board yourself.
http://www.ostec.com.cn/product_detail.php?ProId=58&CateId=33
Hope this can help you~~
Best Regards
Dan