From: Mauro Carvalho Chehab <mche...@s-opensource.com>
Add a glossary of terms used within the media userspace API
documentation, as several concepts are complex enough to cause
misunderstandings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
---
Documentation/media/media_uapi.rst | 3 +
Documentation/media/uapi/glossary.rst | 185 ++++++++++++++++++++++++++
2 files changed, 188 insertions(+)
create mode 100644 Documentation/media/uapi/glossary.rst
diff --git a/Documentation/media/media_uapi.rst
b/Documentation/media/media_uapi.rst
index 28eb35a1f965..41f091a26003 100644
--- a/Documentation/media/media_uapi.rst
+++ b/Documentation/media/media_uapi.rst
@@ -2,6 +2,8 @@
.. include:: <isonum.txt>
+.. _media_uapi:
+
########################################
Linux Media Infrastructure userspace API
########################################
@@ -31,3 +33,4 @@ License".
uapi/cec/cec-api
uapi/gen-errors
uapi/fdl-appendix
+ uapi/glossary
diff --git a/Documentation/media/uapi/glossary.rst
b/Documentation/media/uapi/glossary.rst
new file mode 100644
index 000000000000..1dce36707509
--- /dev/null
+++ b/Documentation/media/uapi/glossary.rst
@@ -0,0 +1,185 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-or-later
+
+.. For GPL-2.0, see LICENSES/preferred/GPL-2.0
+..
+.. For GFDL-1.1-or-later, see:
+..
+.. Permission is granted to copy, distribute and/or modify this document
+.. under the terms of the GNU Free Documentation License, Version 1.1 or
+.. any later version published by the Free Software Foundation, with no
+.. Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.
+.. A copy of the license is included at
+.. Documentation/media/uapi/fdl-appendix.rst.
+
+========
+Glossary
+========
+
+.. note::
+
+ This goal of this section is to standardize the terms used within the media
+ userspace API documentation. It is written incrementally as they are
+ standardized in the media documentation.
+
+ So, it is a Work In Progress.
+
+.. Please keep the glossary entries in alphabetical order
+
+.. glossary::
+
+ Bridge Driver
+ A :term:`device driver` that implements the main logic to talk with
+ media hardware.
+
+ CEC API
+ **Consumer Electronics Control API**
+
+ An API designed to receive and transmit data via an HDMI
+ CEC interface.
+
+ See :ref:`cec`.
+
+ Device Driver
+ Part of the Linux Kernel that implements support for a hardware
+ component.
+
+ Device Node
+ A character device node in the file system used to control and
+ ransfer data in and out of a Kernel driver.
+
+ Digital TV API
+ **Previously known as DVB API**
+
+ An API designed to control a subset of the :term:`Media Hardware`
+ that implements digital TV.
+
+ See :ref:`dvbapi`.
+
+ DSP
+ **Digital Signal Processor**
+
+ A specialized :term:`Microprocessor`, with its architecture
+ optimized for the operational needs of digital signal processing.
+
+ FPGA
+ **Field-programmable Gate Array**
+
+ An :term:`IC` circuit designed to be configured by a customer or
+ a designer after manufacturing.
+
+ See https://en.wikipedia.org/wiki/Field-programmable_gate_array.
+
+ I²C
+ **Inter-Integrated Circuit**
+
+ A multi-master, multi-slave, packet switched, single-ended,
+ serial computer bus used to control some hardware components
+ like sub-device hardware components.
+
+ See http://www.nxp.com/docs/en/user-guide/UM10204.pdf.
+
+ IC
+ **Integrated circuit**
+
+ A set of electronic circuits on one small flat piece of
+ semiconductor material, normally silicon.
+
+ Also known as chip.
+
+ IP Block
+ **Intellectual property core**
+
+ In electronic design a semiconductor intellectual property core,
+ is a reusable unit of logic, cell, or integrated circuit layout
+ design that is the intellectual property of one party.
+ IP Blocks may be licensed to another party or can be owned
+ and used by a single party alone.
+
+ See
https://en.wikipedia.org/wiki/Semiconductor_intellectual_property_core).
+
+ ISP
+ **Image Signal Processor**
+
+ A specialized processor that implements a set of algorithms for
+ processing image data. ISPs may implement algorithms for lens
+ shading correction, demosaicing, scaling and pixel format conversion
+ as well as produce statistics for the use of the control
+ algorithms (e.g. automatic exposure, white balance and focus).
+
+ Media API
+ A set of userspace APIs used to control the media hardware. It is
+ composed by:
+
+ - :term:`CEC API`;
+ - :term:`Digital TV API`;
+ - :term:`MC API`;
+ - :term:`RC API`; and
+ - :term:`V4L2 API`.
+
+ See :ref:`media_uapi`.
+
+ MC API
+ **Media Controller API**
+
+ An API designed to expose and control the relationships between
+ devices and sub-devices.
+
+ See :ref:`media_controller`.
+
+ Media Hardware
+ Subset of the hardware that is supported by the Linux Media API.
+
+ This includes audio and video capture and playback hardware,
+ digital and analog TV, camera sensors, ISPs, remote controllers,
+ codecs, HDMI Consumer Electronics Control, HDMI capture, etc.
+
+
+ See :ref:`media_uapi`.
+
+ Microprocessor
+ Electronic circuitry that carries out the instructions of a
+ computer program by performing the basic arithmetic, logical,
+ control and input/output (I/O) operations specified by the
+ instructions on a single integrated circuit.
+
+ RC API
+ **Remote Controller API**
+
+ An API designed to receive and transmit data from remote
+ controllers.
+
+ See :ref:`remote_controllers`.
+
+ SMBus
+ A subset of I²C, which defines a stricter usage of the bus.
+
+ SPI
+ **Serial Peripheral Interface Bus**
+
+ Synchronous serial communication interface specification used for
+ short distance communication, primarily in embedded systems.
+
+ SoC
+ **System on a Chip**
+
+ An integrated circuit that integrates all components of a computer
+ or other electronic systems.
+
+ V4L2 API
+ **V4L2 userspace API**
+
+ The userspace API defined in :ref:`v4l2spec`, which is used to
+ control a V4L2 hardware.
+
+ V4L2 Hardware
+ Part of a media hardware with is supported by the :term:`V4L2 API`.
+
+ V4L2 Sub-device
+ V4L2 hardware components that aren't controlled by a
+ :term:`bridge driver`.
+
+ V4L2 Sub-device API
+ Part of the :term:`V4L2 API` which control
+ :term:`V4L2 sub-devices <V4L2 Sub-device>`.
+
+ See :ref:`subdev`.
--
2.17.1
