media/v4l/dev-subdev.rst

500 independent streams are cropped and sent out of the subdev from the
514 Simple V4L2 sub-devices do not support multiple, unrelated video streams,
518 two or compose two streams into one, but the inputs and outputs for the
521 Some hardware, e.g. MIPI CSI-2, support multiplexed streams, that is, multiple
522 data streams are transmitted on the same bus, which is represented by a media
524 example, a camera sensor can produce two distinct streams, a pixel stream and a
527 sink pad. The stream-aware receiver will de-multiplex the streams received on
531 Subdevice drivers that support multiplexed streams are compatible with
533 does not support streams, then only stream 0 of source end may be captured.
536 Understanding streams
542 streams from one end of the link to the other, and sub-devices have routing
543 tables which describe how the incoming streams from sink pads are routed to the
554 multiplexed streams the 'stream' field is always 0.
556 Interaction between routes, streams, formats and selections
559 The addition of streams to the V4L2 sub-device interface moves the sub-device
563 the same as without streams (see :ref:`format-propagation`).
565 Instead of the sub-device wide merging of streams from all sink pads
567 other. Any number of routes from streams on sink pads towards streams on
572 are independent of similar configurations on other streams. This is
582 Devices generating the streams may allow enabling and disabling some of the
590 Devices transporting the streams almost always have more configurability with
598 Configuring streams
601 The configuration of the streams is done individually for each sub-device and
602 the validity of the streams between sub-devices is validated when the pipeline
605 There are three steps in configuring the streams:
621 Multiplexed streams setup example
630   sensors (pads 0, 1), and one source pad (pad 2), which outputs two streams.
634   engine. The receiver demultiplexes the incoming streams to the source pads.
686    selections for the streams. This is similar to performing this step without
687    streams, with just one exception: the ``stream`` field needs to be assigned