Summary
In this chapter, we went through the V4L2 asynchronous interface, which eases video bridge and sub-device driver probing. This is useful for intrinsically asynchronous and unordered device registration systems, such as flattened device tree driver probing. Moreover, we dealt with the media controller framework, which allows leveraging V4L2 video pipelines. What we have seen so far lies in the kernel space.
In the next chapter, we will see how to deal with V4L2 devices from user space, thus leveraging features exposed by their device drivers.
