Summary

In this chapter, we dealt with V4L2 bridge device driver development, as well as the concept of sub-devices. We learned about the V4L2 architecture and are now familiar with its data structures. We studied the videobuf2 API and are now able to write platform bridge device drivers. Moreover, we should be able to implement sub-device operations, and to leverage the videobuf2 core.

This chapter can be regarded as the first part of a big picture, since the next chapter still addresses V4L2, but we will deal with the async core and integration with the media controller frameworks.