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MontyMcK
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Since #7323 sceHmd2Initialize succeeds and sceHmd2Open returns a handle, so PPSA01317 runs its PS VR2 set-up and aborts on sceHmd2ReprojectionQueryBufferSizeAlign, which is not implemented (reported in #6350). AnyPS5 has no PS VR2 or PC VR support, so initialization returns libSceHmd's UNSUPPORTED_FEATURE (0x81110016) again, as before #7323, and titles skip their VR set-up. sceHmd2Open then returns NotInitialized. The reprojection size queries stay unimplemented. Refs #6350
19 lines
3.9 KiB
Markdown
19 lines
3.9 KiB
Markdown
# libSceHmd2 technical debt
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### Silent stubs
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- [libSceHmd2](../../../core/libs/prx/libSceHmd2/Export.cpp) has no PS VR2 runtime: `sceHmd2Initialize` returns libSceHmd's `UNSUPPORTED_FEATURE` (0x81110016) for any param, so the other calls answer as before initialization and `sceHmd2Open` returns `NotInitialized` (0x8a720002). These results are restored from the behaviour before #7323 and are not measured on hardware: firmware 13.20's libSceHmd2, with the `/dev/hmd2_cmd` state measured on a retail PS5 with no headset connected (connected flag 0, status 2, user -1), initializes, returns a handle from `sceHmd2Open` and reports `NotDetected`, which the code past the initialization check models but no title reaches. PPSA01317 passes a pointer to 16 zeroed bytes, only tests the result for non-zero and then skips its VR set-up; with initialization succeeding it stopped on `sceHmd2ReprojectionQueryBufferSizeAlign` (#6350). That export, `sceHmd2ReprojectionQueryDisplayBufferSizeAlign` and `sceHmd2ReprojectionQuerySeeThroughBufferSizeAlign` stay unimplemented and throw pending console measurements of their sizes and alignments. The other reprojection and gaze exports and every [libSceVrTracker2](../../../core/libs/prx/libSceVrTracker2/Export.cpp) export throw
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### Unknown function info
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- PPSA29866 imports declared without parameters, signatures unknown, added without an implementation because the title fails to load without them: [sceHmd2ReprojectionQuerySeeThroughBufferSizeAlign](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2), [sceVideoOutSetFlipMaster and sceVideoOutClearFlipMaster](../../../core/libs/prx/libSceVideoOut/Unimplemented.cpp) (libSceVideoOut)
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- PPSA09030 imports from its `Media/Plugins/psvr2.prx` declared without parameters, signatures unknown, added without an implementation because the title fails to load the plugin without them: [sceHmd2ReprojectionGetStatus](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2), [sceVrTracker2GetCoordinateSystem and sceVrTracker2GetPlayAreaBoundaryGeometry](../../../core/libs/prx/libSceVrTracker2/Export.cpp) (libSceVrTracker2)
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- [sceHmd2Open](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the handle is the value the console's driver returned to the first open; titles built with an SDK before 7.00 may open for any user, and the firmware's `sceMbusAddHandleByUserId` result for a user other than the initial one is unknown, so that case throws. 0x8a720006 for a second open is named `AlreadyOpened` from its use
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- [sceHmd2SetVibration](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the second parameter is checked against 25 only while a headset is connected; its name and unit are unknown. The field of view member names are assumed: of the firmware's default tangents the first is the widest and the last two are equal
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- PPSA01317 imports declared without parameters, signatures unknown: the [libSceHmd2](../../../core/libs/prx/libSceHmd2/Export.cpp) exports that throw and the remaining [libSceVrTracker2](../../../core/libs/prx/libSceVrTracker2/Export.cpp) exports. Names from the aerolib NID list
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- PPSA15878 imports declared without parameters, signatures unknown: the [libSceHmd2](../../../core/libs/prx/libSceHmd2/Export.cpp) reprojection and gaze exports, `sceVrTracker2Finalize`, `sceVrTracker2GetPlayAreaOrientedBoundingBox` and `sceVrTracker2LocateCoordinateSystem` in [libSceVrTracker2](../../../core/libs/prx/libSceVrTracker2/Export.cpp), and the `scePadVrController` trigger effect exports in [libScePad](../../../core/libs/prx/libScePad/Export.cpp). Names from the aerolib NID list
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### Functional
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- [sceHmd2Initialize](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the firmware also fails with 0x8a72001f when `sceKernelGetAppInfo` fails and with 0x8a72000a for some applications, depending on app info fields at 0x2c, 0x4b and 0x4d whose meaning is unknown, and then calls `sceMbusInit`; none of this is modelled
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