Bug 219189 - EV_FF_STATUS does not go anywhere after submitted by a driver
Summary: EV_FF_STATUS does not go anywhere after submitted by a driver
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Input Devices (show other bugs)
Hardware: All Linux
: P3 normal
Assignee: drivers_input-devices
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-08-21 17:57 UTC by Katharine Chui
Modified: 2024-08-21 17:57 UTC (History)
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Regression: No
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Description Katharine Chui 2024-08-21 17:57:58 UTC 
Be it a from a native input driver or from uinput, EV_FF_STATUS cannot get through to evdev https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/input/input.c?h=v6.10#n241 .

Wine seems to use it, if the udev backend is used in winebus, https://gitlab.winehq.org/wine/wine/-/blob/6e15604c48acd63dd8095a4ce2fd011cb3be96db/dlls/winebus.sys/bus_udev.c#L709, it would be used to provide driver updated effect status for IDirectInputEffect::GetEffectStatus.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/input/ff.rst?h=v6.10#n237 says that it is incomplete, but didn't state why it was incomplete.

So, what is the plan for EV_FF_STATUS? In it's current state it doesn't do anything even with the iforce driver. Should it just get INPUT_PASS_TO_HANDLERS so that other drivers and application can start using it? Should it get deprecated since it doesn't quite do anything?
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