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c05e45ac77
libcamera always keeps all /dev/video# and /dev/v4l2_subdev# nodes for a pipeline open after enumerating the camera. This is a problem for the uvcvideo pipeline handler. Keeping /dev/video# open stops the UVC USB device from being able to enter runtime-suspend causing significant unnecessary power-usage. Add a stub acquireDevice() function to the PipelineHandler class which pipeline handlers can override. The uvcvideo pipeline handler will use this to delay opening /dev/video# until the device is acquired. This 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> Reviewed-by: Harvey Yang <chenghaoyang@chromium.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
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| .. | ||
| base | ||
| internal | ||
| ipa | ||
| camera.h | ||
| camera_manager.h | ||
| color_space.h | ||
| control_ids.h.in | ||
| controls.h | ||
| fence.h | ||
| formats.h.in | ||
| framebuffer.h | ||
| framebuffer_allocator.h | ||
| geometry.h | ||
| logging.h | ||
| meson.build | ||
| orientation.h | ||
| pixel_format.h | ||
| request.h | ||
| stream.h | ||
| transform.h | ||
| version.h.in | ||