Hello Hans, Nice to meet u on the mailing-list. I'm an engineer of camera device driver, and work with Nathaniel(Dongsoo, Kim). I'm wondering about how to use the Control Flags defined in the videodev2.h. The Control Flags defined in the videodev2.h is the following as you know, /* Control flags */ #define V4L2_CTRL_FLAG_DISABLED 0x0001 #define V4L2_CTRL_FLAG_GRABBED 0x0002 #define V4L2_CTRL_FLAG_READ_ONLY 0x0004 #define V4L2_CTRL_FLAG_UPDATE 0x0008 #define V4L2_CTRL_FLAG_INACTIVE 0x0010 #define V4L2_CTRL_FLAG_SLIDER 0x0020 I tryed to find the usage of this definitions in the directories of drivers/media/video & include/, but I didn't. Actually, I need to use this definitions for checking of ISP status. So, I wanna know exact usage of this definitions to make the generic driver code. i'll appreciate your answer beforehand. Thanks to read. Regard, riverful (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