Supporting the Camera Interface on the C.H.I.P
summary
Implemented an upstream Allwinner camera driver for the $9 C.H.I.P, hooking the SoC controller and sensors into the Linux V4L2 streaming stack with support for single- and multi‑plane formats, DMA-BUF sharing and the component/media-controller link stage. Tested with v4l2-compliance and v4l2 tools; captures reliably to memory at roughly 640×480 video (snapshots up to 5MP), VPU decoding works but encoding is still partially reverse-engineered, and DRM plane zero‑copy display integration is planned.
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chapters (15)
- 0:00Intro
- 2:15Background
- 4:15VOB
- 6:17Format
- 15:02Drivers
- 17:23Capture
- 19:22Formats
- 21:25Media Controller API
- 29:33CPU Usage
- 31:13Latency
- 31:46Buffering
- 33:28Scaling
- 34:49Independent drivers
- 35:48Use cases
- 37:21Conclusion
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