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DM8148加载汇顶的i2c触摸屏驱动,一直出现i2c_transfer错误,返回值是-121



你好,我在ti8148上加载汇顶科技的gt9271的驱动gt9xx.ko后,会一直打印i2c_transfer错误,返回值是-121,如果重新插拔一次后,就正常工作了,并且 每次断电后都会出现i2c_transfer错误,返回值是-121,如果只是在板子内部reboot,不断电的情况下,驱动正常工作。用示波器看了i2c波形是正常的,在内核中注册了i2c地址,在设备上总线上也能看到。请问是啥原因啊?