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>
---
v3:
- Add SPDX header and dual-license the glossary
- Make glossary generic enough to be used for all media uAPI documentation;
- Add a few new items to the glossary, to imply that it covers not only V4L2;
- Move it to the uAPI document as a hole.
v2: Did some changes based on Sakari's feedback.
Documentation/media/media_uapi.rst | 3 +
Documentation/media/uapi/glossary.rst | 162 ++++++++++++++++++++++++++
2 files changed, 165 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..9e2a2b29e8b2
--- /dev/null
+++ b/Documentation/media/uapi/glossary.rst
@@ -0,0 +1,162 @@
+.. 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 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 device driver that implements the main logic to talk with
+ a media hardware.
+
+ For V4L2 hardware, this is also known as V4L2 main driver.
+
+ Consumer Electronics Control API
+ An API designed to receive and transmit data via a HDMI
+ CEC interface.
+
+ See :ref:`cec`.
+
+ Device Node
+ A character device node in the file system used to control and do
+ input/output data transfers from/to a Kernel driver.
+
+ Digital TV API - DVB API
+ An API designed to control the media device components related to
+ digital TV, including frontends, demuxes, streaming, conditional
+ access, etc.
+
+ See :ref:`dvbapi`.
+
+ Digital Signal Processor - DSP
+ A specialized microprocessor, with its architecture optimized for
+ the operational needs of digital signal processing.
+
+ Driver
+ Part of the Linux Kernel that implements support for a hardware
+ component.
+
+ Field-programmable Gate Array - FPGA
+ A field-programmable gate array (FPGA) is an integrated circuit
+ designed to be configured by a customer or a designer after
+ manufacturing.
+
+ See https://en.wikipedia.org/wiki/Field-programmable_gate_array.
+
+ Inter-Integrated Circuit - I²C
+ 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.
+
+ Integrated circuit - IC
+ A set of electronic circuits on one small flat piece of
+ semiconductor material, normally silicon.
+
+ Also known as chip.
+
+ Intelectual property core - IP block
+ 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 cores 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).
+
+ Image Signal Processor - ISP
+ A specialised processor that implements a set of algorithms for
+ processing image data. ISPs may implement algorithms for lens
+ shading correction, demosaic, 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 a media hardware.
+
+ See :ref:`media_uapi`.
+
+ Media Controller
+ An API designed to expose and control devices and sub-devices'
+ relationships to applications.
+
+ See :ref:`media_controller`.
+
+ Media Hardware
+ Subset of a hardware that is supported by the Linux Media API.
+
+ 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
+ An 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.
+
+ Remote Controller API
+ An API designed to receive and transmit data from remote
+ controllers.
+
+ See :ref:`remote_controllers`.
+
+ SMBus
+ A subset of I²C, with defines a stricter usage of the bus.
+
+ Serial Peripheral Interface Bus - SPI
+ Synchronous serial communication interface specification used for
+ short distance communication, primarily in embedded systems.
+
+ System on a Chip - SoC
+ An integrated circuit that integrates all components of a computer
+ or other electronic systems.
+
+ Sub-device hardware components
+ V4L2 hardware components that aren't controlled by a
+ V4L2 main driver.
+
+ V4L2 userspace API - V4L2 API
+ The userspace API defined at :ref:`v4l2spec`, with is used to control
+ a V4L2 hardware.
+
+ V4L2 hardware
+ Part of a media hardware with is supported by the V4L2
+ userspace API.
+
+ V4L2 main driver
+ A V4L2 device driver that implements the main logic to talk with
+ a V4L2 hardware.
+
+ V4L2 sub-device
+ Part of a media hardware that it is implemented by a device
+ driver that is not part of the main V4L2 driver.
+
+ See :ref:`subdev`.
--
2.17.1
