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authorHans de Goede <hdegoede@redhat.com>2024-08-30 13:12:06 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-08-30 15:15:39 +0300
commit11e396bf9faf708bedc785a3ac5a4d3cc69f4c75 (patch)
tree85ec3601d0e828ef1d4476837cf8eb749eb004cf /test/ipc/unixsocket_ipc.cpp
parentc05e45ac7743c60a78ebee1b9e341fa5e089285d (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 'test/ipc/unixsocket_ipc.cpp')
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