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author | Hans de Goede <hdegoede@redhat.com> | 2024-08-30 13:12:06 +0200 |
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committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2024-08-30 15:15:39 +0300 |
commit | 11e396bf9faf708bedc785a3ac5a4d3cc69f4c75 (patch) | |
tree | 85ec3601d0e828ef1d4476837cf8eb749eb004cf /meson_options.txt | |
parent | c05e45ac7743c60a78ebee1b9e341fa5e089285d (diff) |
libcamera: camera: Use invokeMethod() for pipe_->acquire() and pipe_->release()
The uvcvideo driver needs to open / close its /dev/video# node from
pipe_->acquireDevices() / pipe_->releaseDevices().
V4L2VideoDevice::open() creates an EventNotifier and this notifier needs
to be created from the CameraManager thread.
Use invokeMethod() for pipe_->acquire() and pipe_->release() so that the
EventNotifiers are created from the CameraManager thread context.
Running pipe_->acquire() and pipe_->release() from the CameraManager
thread context serializes all calls to them. Drop PipelineHandler::lock_
this now is no longer necessary and update the "\context" part of the
documentation for acquire[Device]() and release[Device]() to match.
Note the delayed opening of /dev/video# is a special case because the
kernel uvcvideo driver powers on the USB device as soon as /dev/video#
is opened. This behavior should *not* be copied by other pipeline
handlers.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'meson_options.txt')
0 files changed, 0 insertions, 0 deletions