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feat(display): edid_lock policy axis — pin AMD connector EDID emulation while streaming #176

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enricobuehler merged 2 commits from worktree-edid-lock-toggle into main 2026-08-12 13:12:17 +00:00
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enricobuehler f4e39a442b feat(display): edid_lock policy axis — pin AMD connector EDID emulation while streaming
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Productizes the adl-emul probe (the prior commit) as the display-policy axis its
PR promised: the ADL FFI moves to pf_win_display::adl_emul (one surface shared by
the probe tool and the host, so a reporter's probe and the console's toggle
exercise byte-identical driver calls), and an EXPERIMENTAL edid_lock axis joins
ddc_power_off/pnp_disable_monitors — orthogonal to presets, off by default.

At the first Exclusive isolate the host pins each occupied AMD connector's live
EDID + ADL_EMUL_MODE_ALWAYS (the software HPD dummy) BEFORE the physicals
deactivate; last-member teardown unlocks. Pinned emulation outlives the process,
so a crash journal (edid-lock-active.json) unlocks on the next host start,
mirroring the pnp_disable_monitors recovery. Inert without an AMD driver.

The console shows the toggle ONLY when the GPU inventory lists an AMD adapter —
the lever exists nowhere else, and a toggle that can never act is the 'saved and
then did nothing' trap the enforced-axes list exists to prevent.
 2026-08-12 08:47:42 +02:00
enricobuehler a0577cb86e feat(tools/display-disturb): adl-emul — AMD connector-emulation probe (software HPD dummy) 
The standby-sink stall program's §3 dead-end list marked ADL EmulationMode
'likely Pro-gated' on field hearsay, with 'probe once, log rc' as the owed
falsification — never run. Three RX 9070 XT field cases later (ASUS
VG32VQ1B/DP, Odyssey G60SD/DP, LG UltraGear 32GS95UE/HDMI), this is that
probe, shippable to reporters: read-only caps/board-layout/connection-state
walk by default, --lock pins the live EDID + ADL_EMUL_MODE_ALWAYS on
occupied connectors (the software HPD-holding dummy), --unlock restores.
Every call prints the bench's epoch_ms correlation line with the decoded
ADL rc — ADL_ERR_NOT_SUPPORTED(-8) vs ADL_OK on consumer Adrenalin is the
Pro-gating answer, and a --lock run during a stream with the sink asleep
is the direct A/B for the metronomic stall class.

atiadlxx.dll is bound dynamically (absent = clean exit 2), structs mirror
adl_structures.h verbatim, and the probe touches only connectors the
board-layout walk enumerated. Gates: check/clippy -D warnings (msvc
cross-target) + fmt clean; native stub unaffected.
 2026-08-12 08:16:33 +02:00