Hi Hans and everyone, I wonder if the subdev driver need pm features, like a power-off when suspend and power-on when resume. Commonly, It seems alright that the platform driver using this subdev driver must do such process. But, thinking deeply, irrelevantly at this dependency of the platform and the subdev, I think the subdev driver must support pm features. If the platform driver dosen't support subdev driver's pm, the ISP or camera device controlled with non-pm-support subdev driver, may have a problems when the system is suspended/resumed. In the subev driver, using pm or not. which one is right?? Regards, HeungJun Kim -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html