On Mon Sep 28 17:50:20 2026 -0400, Michael Jordan wrote:
> The OBSBOT Tiny 2 does not set AUTOUPDATE in GET_INFO for its pan/tilt
> and zoom controls, so reads return the last value written. The camera
> moves them on its own when tracking a subject, and sends no control
> change events.
>
> Add fixup entries for the three controls.
>
> lsusb -v (device descriptor and Camera Terminal):
>
> Bus 003 Device 006: ID 3564:fef8 Remo Tech Co., Ltd. OBSBOT Tiny 2
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.10
> bDeviceClass 239 Miscellaneous Device
> bDeviceSubClass 2 [unknown]
> bDeviceProtocol 1 Interface Association
> bMaxPacketSize0 64
> idVendor 0x3564 Remo Tech Co., Ltd.
> idProduct 0xfef8 OBSBOT Tiny 2
> bcdDevice 4.09
> iManufacturer 1 Remo Tech Co., Ltd.
> iProduct 2 OBSBOT Tiny 2
> iSerial 0
> bNumConfigurations 1
> [...]
> VideoControl Interface Descriptor:
> bLength 18
> bDescriptorType 36
> bDescriptorSubtype 2 (INPUT_TERMINAL)
> bTerminalID 1
> wTerminalType 0x0201 Camera Sensor
> bAssocTerminal 0
> iTerminal 0
> wObjectiveFocalLengthMin 0
> wObjectiveFocalLengthMax 0
> wOcularFocalLength 0
> bControlSize 3
> bmControls 0x00023e3e
> Auto-Exposure Mode
> Auto-Exposure Priority
> Exposure Time (Absolute)
> Exposure Time (Relative)
> Focus (Absolute)
> Zoom (Absolute)
> Zoom (Relative)
> PanTilt (Absolute)
> PanTilt (Relative)
> Roll (Absolute)
> Focus, Auto
>
> Suggested-by: Ricardo Ribalda <[email protected]>
> Reviewed-by: Ricardo Ribalda <[email protected]>
> Assisted-by: LLM
> Signed-off-by: Michael Jordan <[email protected]>
> Link: https://patch.msgid.link/[email protected]
> Reviewed-by: Hans de Goede <[email protected]>
> Signed-off-by: Hans de Goede <[email protected]>
> Signed-off-by: Laurent Pinchart <[email protected]>
> Signed-off-by: Hans Verkuil <[email protected]>
Patch committed.
Thanks,
Hans Verkuil
drivers/media/usb/uvc/uvc_ctrl.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
---
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 97f0fc48321e..e7ff5aede9f0 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -2865,6 +2865,18 @@ static bool uvc_ctrl_fixup_flags(struct uvc_device *dev,
UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
UVC_CTRL_FLAG_AUTO_UPDATE },
+ { { USB_DEVICE(0x3564, 0xfef8) }, 1,
+ UVC_CT_PANTILT_ABSOLUTE_CONTROL,
+ UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE |
+ UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE },
+ { { USB_DEVICE(0x3564, 0xfef8) }, 1,
+ UVC_CT_PANTILT_RELATIVE_CONTROL,
+ UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE |
+ UVC_CTRL_FLAG_AUTO_UPDATE },
+ { { USB_DEVICE(0x3564, 0xfef8) }, 1,
+ UVC_CT_ZOOM_ABSOLUTE_CONTROL,
+ UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE |
+ UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE },
};
unsigned int i;
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