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https://git.libcamera.org/libcamera/libcamera.git
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96c0eb338e
If an exposure time change adjusts the vblanking limits, and we set both VBLANK and EXPOSURE controls through the VIDIOC_S_EXT_CTRLS ioctl, the latter may fail if the value is outside of the limits calculated by the old VBLANK value. This is a limitation in V4L2 and cannot be fixed by setting VBLANK before EXPOSURE in a single VIDIOC_S_EXT_CTRLS ioctl. The workaround here is to have the DelayedControls object mark the VBLANK control as "priority write", which then write VBLANK separately from (and ahead of) any other controls. This way, the sensor driver will update the EXPOSURE control with new limits before the new values is presented, and will thus be seen as valid. To support this, a new struct DelayedControls::ControlParams is used in the constructor to provide the control delay value as well as the priority write flag. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Tested-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Tested-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> [Kieran: Fix up trivial comments, merge conflicts] Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> |
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| .. | ||
| camera | ||
| controls | ||
| ipa | ||
| ipc | ||
| libtest | ||
| log | ||
| media_device | ||
| pipeline | ||
| process | ||
| serialization | ||
| stream | ||
| v4l2_compat | ||
| v4l2_subdevice | ||
| v4l2_videodevice | ||
| bayer-format.cpp | ||
| byte-stream-buffer.cpp | ||
| camera-sensor.cpp | ||
| delayed_contols.cpp | ||
| event-dispatcher.cpp | ||
| event-thread.cpp | ||
| event.cpp | ||
| file-descriptor.cpp | ||
| file.cpp | ||
| geometry.cpp | ||
| hotplug-cameras.cpp | ||
| mapped-buffer.cpp | ||
| meson.build | ||
| message.cpp | ||
| object-delete.cpp | ||
| object-invoke.cpp | ||
| object.cpp | ||
| pixel-format.cpp | ||
| signal-threads.cpp | ||
| signal.cpp | ||
| span.cpp | ||
| threads.cpp | ||
| timer-thread.cpp | ||
| timer.cpp | ||
| utils.cpp | ||