Hi, Logitech Streamcam can be mounted in 'portrait mode' as well. It reports the current roll (-90, 0, 90, 180) with UVC_CT_ROLL_ABSOLUTE_CONTROL. This RFC defines V4L2_CID_ROLL_ABSOLUTE, and maps UVC_CT_ROLL_ABSOLUTE_CONTROL to make it available to userspace. Then, the userspace can rotate the stream based on the roll. Is it better to use V4L2_CID_CAMERA_SENSOR_ROTATION for this? The value set matches that control. If yes, is it worth mapping UVC_CT_ROLL_ABSOLUTE_CONTROL to V4L2_CID_CAMERA_SENSOR_ROTATION for this camera only? Any feedback is greately appreciated. Gergő Köteles (2): media: v4l2: ctrls: Add ROLL_ABSOLUTE control media: v4l2: map UVC_CT_ROLL_ABSOLUTE_CONTROL .../userspace-api/media/v4l/ext-ctrls-camera.rst | 5 +++++ drivers/media/usb/uvc/uvc_ctrl.c | 9 +++++++++ drivers/media/v4l2-core/v4l2-ctrls-defs.c | 1 + include/uapi/linux/v4l2-controls.h | 2 ++ 4 files changed, 17 insertions(+) base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 -- 2.41.0
