fix(horipad_steam): : invert gyroscope values and prevent UHID timeout#540
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honjow wants to merge 3 commits intoShadowBlip:mainfrom
Open
fix(horipad_steam): : invert gyroscope values and prevent UHID timeout#540honjow wants to merge 3 commits intoShadowBlip:mainfrom
honjow wants to merge 3 commits intoShadowBlip:mainfrom
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pastaq
approved these changes
Mar 1, 2026
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Are we sure the horipad gyro uses inverted values or is this an issue with the mount matrix of the source device? |
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When switching the target to DualSense or Deck-UHID, the motion control values are correct. I have tested on multiple devices, and only the horipad_steam target has the inversion issue. Therefore, the matrix problem can be ruled out. |
Without a reply, each GET_REPORT request times out after ~5 seconds, causing significant delays when Steam probes the device during controller enumeration.
According to SDL_hidapi_steam_hori.c lines 329-330, bytes 12-13 are read as yaw (imu_data[1]) and bytes 14-15 are read as roll (imu_data[2]). The previous field names had them reversed. https://github.com/libsdl-org/SDL/blob/main/src/joystick/hidapi/SDL_hidapi_steam_hori.c#L329-L330
SDL negates all three gyro axes when reading from this device, so we pre-negate the values here to produce the correct orientation after SDL's correction. https://github.com/libsdl-org/SDL/blob/main/src/joystick/hidapi/SDL_hidapi_steam_hori.c#L329-L331
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With the current version, when using the horipad_steam target, it takes a long time to detect the target after switching. Additionally, all gyroscope sensor axes are inverted. Fix both of these issues.