v4l2_device_register_subdev
时间: 2023-09-20 19:11:30 浏览: 49
v4l2_device_register_subdev() is a function in the V4L2 (Video for Linux 2) subsystem of the Linux kernel. It is used to register a subdevice (a hardware component that performs a specific function, such as a camera sensor or a video encoder) with the V4L2 framework.
The function takes two arguments: a pointer to a v4l2_device struct, which represents the V4L2 device that the subdevice is being registered with, and a pointer to a v4l2_subdev struct, which represents the subdevice being registered.
When v4l2_device_register_subdev() is called, it adds the subdevice to the V4L2 device's list of subdevices and sets up the necessary data structures for communication between the subdevice and the V4L2 framework. This allows applications to access the subdevice through the V4L2 API, which provides a standardized interface for controlling and configuring video hardware.
Overall, v4l2_device_register_subdev() is an important function for integrating new hardware components into the V4L2 subsystem and enabling their use in Linux-based video applications.