atomic_check previously ignored the _available_connectors parameter
(prevented by underscore prefix). The CRTC state's connectors: Vec<u32>
field declared which connectors to bind, but atomic_check never
verified they actually existed or were connected. This allowed
client commits to reference phantom or disconnected connectors
and silently produce invalid state.
Fix: use the available_connectors slice to validate that each
referenced connector ID exists in hardware and has connection
status Connected. Return CrtcNotFound or ConnectorDisconnected
respectively so the kernel rejects invalid commits with a clear
error rather than producing a malformed display state.
This unblocks libdrm drmModeAtomicCommit callers that rely on
DRM_MODE_ATOMIC_ALLOW_MODESET returning success only for valid
connector configurations.
vasilito
32993a9ee5