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be2fff6563
A memory-to-memory pipeline device consists in three
entities: two DMA engine and one video processing entities.
The DMA engine entities are linked to a V4L interface.
This commit add a new v4l2_m2m_{un}register_media_controller
API to register this topology.
For instance, a typical mem2mem device topology would
look like this:
Device topology
- entity 1: source (1 pad, 1 link)
type Node subtype V4L flags 0
pad0: Source
-> "proc":1 [ENABLED,IMMUTABLE]
- entity 3: proc (2 pads, 2 links)
type Node subtype Unknown flags 0
pad0: Source
-> "sink":0 [ENABLED,IMMUTABLE]
pad1: Sink
<- "source":0 [ENABLED,IMMUTABLE]
- entity 6: sink (1 pad, 1 link)
type Node subtype V4L flags 0
pad0: Sink
<- "proc":0 [ENABLED,IMMUTABLE]
[hans.verkuil@cisco.com: mark interface links as IMMUTABLE]
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.