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feat(gamepad): N4 spike kit — software-devnode Steam Deck probe for Windows

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The gamepad-new-types §6 go/no-go rig, ready to run the moment .173 is
back (the box is currently down, so the observation itself is still
owed): does Steam Input on Windows promote a software-devnode HID Deck
(28DE:1205), or does it need a real USB bus identity (the documented
GameInput instance-path gap — the Linux 'Interface: -1' lesson)?

- Driver: scratch device_type=3 serves the Deck identity — the captured
  38-byte controller-interface descriptor, 28DE:1205 attributes, Valve
  strings, the Deck neutral frame, and the Steam 0x83/0xAE feature
  contract (SET_FEATURE latches the command, GET_FEATURE answers it —
  attribute blob + unit serial mirroring steam_proto::feature_reply).
  Never stamped by a session. INF gains pf_steamdeck.
- Host: deck_spike_hold() + the `deck-windows-spike` subcommand — stamps
  devtype 3, spawns the devnode under VID_28DE&PID_1205, streams the
  neutral frame, prints what to observe (Steam logs/controller.txt,
  controller settings) and logs any output reports Steam writes.

Run recipe (on .173, once the updated signed driver is staged): install
driver, start Steam, `punktfunk-host.exe deck-windows-spike`, watch
controller.txt. GO -> plan a proper N4 phase (the Deck codec is already
shared); NO-GO -> document next to the Linux Interface:-1 note and keep
the SteamDeck->DualSense Windows fold.

Verified: .133 clippy -D warnings + the driver workspace cargo check
(WDK) both green; .21 clippy + 304/0 tests unaffected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-07-14 11:44:59 +02:00
parent 61c752e91e
commit 8d8168b0e0
5 changed files with 213 additions and 23 deletions
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packaging/windows/drivers/pf-dualsense/pf_dualsense.inx
+1 -1
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@@ -30,7 +30,7 @@ pf_dualsense.dll=1
; SwDeviceCreate rejects it with E_INVALIDARG); `pf_dualshock4` / `pf_dualsenseedge` for the host's
; virtual DualShock 4 / DualSense Edge — the same driver binds all of them and serves the matching
; identity per the device_type byte the host stamps into shared memory.
%DeviceDesc%=pfDualSense, root\pf_dualsense, pf_dualsense, pf_dualshock4, pf_dualsenseedge
%DeviceDesc%=pfDualSense, root\pf_dualsense, pf_dualsense, pf_dualshock4, pf_dualsenseedge, pf_steamdeck
[pfDualSense.NT]
CopyFiles=UMDriverCopy