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AM335x 从EMMC启动LCD问题(sdk7.0)

各位好:

      我现在的问题是从T卡启动(sdk7.0),再修改dtb文件后可以正常启动,现在从EMMC启动(sdk7.0),移植同样的dtb文件后无法正常使lcd工作,通过log分析,从EMMC启动的时候根本没有调用fb驱动,请问需要做什么修改吗?