Display Sharing in Heterogeneous Systems Using Linux as High...
summary
TI demonstrates two concrete solutions for sharing one display controller between a high‑level OS and an RTOS: RPMsg‑based virtualization where DRM KMS calls translate to rpmsg messages with virtual encoders/connectors and ready/info/commit callbacks, and device‑tree static partitioning where ownership, Z order and VP mapping are declared and enforced in driver code. Hardware firewalling of 4KB register regions with duplicated IRQs guarantees isolation and synchronous vblank notification; a demo shows Linux can crash while RTOS tell‑tales remain visible. Patches exist as an RFC upstream.
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chapters (12)
- 0:00Display sharing introduction
- 1:06Practical applications
- 6:21Design considerations
- 7:26IPC-based solutions
- 13:39Raspberry Pi solution
- 17:22Static partitioning design
- 28:08Demo and hardware
- 29:23Q&A
- 31:31Q&A
- 36:23Live demo
- 38:41Q&A
- 41:25Summary
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