Camera Driver 계층: 타이밍 편차 대응을 위한 watchdog 복구

raspberrypi/libcamera / include/libcamera/internal/v4l2_videodevice.h / State / L241-L293

te_; std::optional<unsigned int> firstFrame_; Timer watchdog_; utils::Duration watchdogDuration_; }

• 기술 영역v4l2
• 메커니즘watchdog

관측 시점 2026-07-27T13:08:52+02:00 · 최초 발견 commit 53397ea15b

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::streamOn / L1990-L2008

\brief Start the video stream \return 0 on success or a negative error code otherwise

• 기술 영역v4l2
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::streamOff / L2023-L2056

\brief Stop the video stream Buffers that are still queued when the video stream is stopped are immediately dequeued with their status set to FrameMetadata::FrameCancelled, and the bufferReady signal is emitted for them. The order in which those buffers are dequeued is not specified. This will be a no-op if the stream…

• 기술 영역v4l2
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::watchdogExpired / L2094-L2100

\brief Slot to handle an expired dequeue timer When this slot is called, the time between successive dequeue events is over the required timeout. Emit the \ref V4L2VideoDevice::dequeueTimeout signal.

• 기술 영역v4l2
• 문제timeout
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / Issue #350

f the box. I'd be awesome if it was documented how to work around these issues. ``` v4l2: Current input: "unicam-image"

• 기술 영역v4l2, camera stack, fps
• 문제work around

관측 시점 2026-08-04T13:37:09Z

raspberrypi/libcamera / src/v4l2/v4l2_camera_proxy.cpp / V4L2CameraProxy::ioctl / L857-L959

r the ioctl request, which would sign-extend to * an incorrect value for unsigned longs on 64 bit architectures by

• 기술 영역v4l2
• 문제incorrect
• 효과prevent

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libpisp / v1.4.0

github.com/raspberrypi/libpisp/pull/58 * helpers: Fix incorrect header in media_device.cpp by @naushir in https://gith

• 기술 영역media device
• 문제incorrect
• 사소한 변경changelog

관측 시점 2026-03-23T12:06:27Z

raspberrypi/libcamera / src/libcamera/v4l2_device.cpp / V4L2Device::updateControlInfo / L779-L799

\brief Update the information for all device controls The V4L2Device class caches information about all controls supported by the device and exposes it through the controls() and controlInfo() functions. Control information may change at runtime, for instance when formats on a subdev are modified. When this occurs, th…

• 기술 영역subdev, v4l2
• 문제expensive operation

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / include/libcamera/base/regex.h / 35c02dae9e

libcamera: base: regex: Fix preprocessor check clang has no `maybe-uninitialized` warning, therefore the suppression will generate a compiler error. This was probably hidden by the fact that `__SANITIZE_*__` macros have only been added to clang since llvm 22. Link: https://github.com/llvm/llvm-project/commit/568c23bbd…

• 기술 영역v4l2
• 문제work around
• 효과optimiz

관측 시점 2026-04-27T17:04:10+02:00

intel/ipu6-camera-hal / modules/v4l2/v4l2_device.h / CROS_CAMERA_EXPORT / L260-L290

) in case of flush request, i.e., to abort poll before timeout explicit V4L2DevicePoller(const std::vector<V4L2De

• 기술 영역v4l2
• 문제timeout

관측 시점 2024-07-18T14:37:27+08:00 · 최초 발견 commit a354967a6a

intel/ipu6-camera-hal / Issue #93

Important memory leak of v4l2-relayd service after each camera start Hi dear

• 기술 영역v4l2
• 문제memory leak

관측 시점 2024-03-28T14:40:33Z

raspberrypi/libcamera / include/libcamera/internal/v4l2_videodevice.h / V4L2VideoDevice / L187-L314

streamOff(); void setDequeueTimeout(utils::Duration timeout); Signal<> dequeueTimeout; static std::unique_ptr<V

• 기술 영역v4l2
• 문제timeout

관측 시점 2026-07-27T13:08:52+02:00 · 최초 발견 commit 53397ea15b