The host can now drive the new pf-vdisplay IddCx driver instead of SudoVDA. Compiles
clean on BOTH Windows (cargo check -p punktfunk-host green) and Linux (cfg(windows)-gated,
main CI unaffected); adversarially reviewed (no blockers, lockstep with the driver).
- new vdisplay/pf_vdisplay.rs: cloned from the proven sudovda.rs, repointed to
pf_vdisplay_proto — interface GUID 70667664 (not e5bcc234), IOCTL 0x900-0x905 (not the
gappy 0x800/0x888/0x8FF), AddRequest/AddReply/RemoveRequest/SetRenderAdapterRequest
(bytemuck Pod, not the GUID-keyed AddParams), a u64 session_id monitor key (not a minted
GUID), and a single IOCTL_GET_INFO handshake that HARD-asserts protocol_version (vs
SudoVDA two-IOCTL best-effort). Full MGR/linger/refcount/teardown lifecycle preserved.
- reuses sudovda.rs backend-neutral CCD/DXGI helpers (set_active_mode, isolate/restore_
displays_ccd, resolve_gdi_name, resolve_render_adapter_luid, MON_GEN/CURRENT_MON_GEN,
SavedConfig) — widened to pub(crate), not duplicated.
- vdisplay::open()/probe() select the backend: PUNKTFUNK_VDISPLAY=pf|sudovda forces one;
default auto-detects (prefer pf-vdisplay if its interface enumerates, else SudoVDA stays
the shipping fallback).
Notes: SET_RENDER_ADAPTER is tolerated as the driver returns NOT_IMPLEMENTED today (STEP 4
tail); the cross-MGR wait_for_monitor_released only paces sudovda's MGR (benign until
IDD-push lands on pf-vdisplay, STEP 6 — documented in-code). On-glass "monitor appears at
WxH@Hz" gate is next.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
1a86f16783