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Message-Id: <65af989db9cc5479b863657add04940ae6de9d5c.1503924361.git.mchehab@s-opensource.com>
Date: Mon, 28 Aug 2017 09:53:55 -0300
From: Mauro Carvalho Chehab <mchehab@...pensource.com>
To: Linux Doc Mailing List <linux-doc@...r.kernel.org>,
Linux Media Mailing List <linux-media@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@...pensource.com>,
Mauro Carvalho Chehab <mchehab@...radead.org>,
linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
Hans Verkuil <hans.verkuil@...co.com>,
Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Subject: [PATCH v5 1/7] media: add glossary.rst with a glossary of terms used at V4L2 spec
Add a glossary of terms for V4L2, as several concepts are complex
enough to cause misunderstandings.
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
---
Documentation/media/uapi/v4l/glossary.rst | 147 ++++++++++++++++++++++++++++++
Documentation/media/uapi/v4l/v4l2.rst | 1 +
2 files changed, 148 insertions(+)
create mode 100644 Documentation/media/uapi/v4l/glossary.rst
diff --git a/Documentation/media/uapi/v4l/glossary.rst b/Documentation/media/uapi/v4l/glossary.rst
new file mode 100644
index 000000000000..0b6ab5adec81
--- /dev/null
+++ b/Documentation/media/uapi/v4l/glossary.rst
@@ -0,0 +1,147 @@
+========
+Glossary
+========
+
+.. note::
+
+ This goal of section is to standardize the terms used within the V4L2
+ documentation. It is written incrementally as they are standardized in
+ the V4L2 documentation. So, it is a Work In Progress.
+
+.. Please keep the glossary entries in alphabetical order
+
+.. glossary::
+
+ Bridge driver
+ The same as V4L2 main driver.
+
+ 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 Signal Processor - DSP
+ A specialized microprocessor, with its architecture optimized for
+ the operational needs of digital signal processing.
+
+ Driver
+ The 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.
+
+ Hardware component
+ A subset of the media hardware. For example an I²C or SPI device,
+ or an IP block inside an SoC or FPGA.
+
+ Hardware peripheral
+ A group of hardware components that together make a larger
+ user-facing functional peripheral. For instance the SoC ISP IP
+ cores and external camera sensors together make a
+ camera hardware peripheral.
+
+ Also known as peripheral.
+
+ Hardware peripheral control
+ Type of control for a hardware peripheral supported by V4L2 drivers.
+
+ See :ref:`v4l2_hardware_control`.
+
+ Inter-Integrated Circuit - I²C
+ A multi-master, multi-slave, packet switched, single-ended,
+ serial computer bus used to control V4L2 sub-devices.
+
+ 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.
+
+ IP block
+ The same as IP core.
+
+ Intelectual property core - IP 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 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 processor - ISP
+ A specialized digital signal processor used for image processing
+ in digital cameras, mobile phones or other devices.
+
+ Peripheral
+ The same as hardware peripheral.
+
+ Media Controller
+ An API used to identify the hardware components and (optionally)
+ change the links between hardware components.
+
+ See :ref:`media_controller`.
+
+ MC-centric
+ V4L2 hardware that requires a Media controller.
+
+ See :ref:`v4l2_hardware_control`.
+
+ 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.
+
+ 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
+ Hardware components that aren't controlled by the
+ V4L2 main driver.
+
+ V4L2 device node
+ A device node that is associated to a V4L2 main driver,
+ as specified in :ref:`v4l2_device_naming`.
+
+ V4L2 hardware
+ A hardware used to on a media device supported by the V4L2
+ subsystem.
+
+ V4L2 hardware control
+ The type of hardware control that a device supports.
+
+ See :ref:`v4l2_hardware_control`.
+
+ V4L2 main driver
+ The V4L2 device driver that implements the main logic to talk with
+ the V4L2 hardware.
+
+ Also known as bridge driver.
+
+ See :ref:`v4l2_hardware_control`.
+
+ V4L2 sub-device
+ Part of the media hardware that it is implemented by a device
+ driver that is not part of the main V4L2 driver.
+
+ See :ref:`subdev`.
+
+ Vdev-centric
+ V4L2 hardware that it is controlled via V4L2 device nodes.
+
+ See :ref:`v4l2_hardware_control`.
diff --git a/Documentation/media/uapi/v4l/v4l2.rst b/Documentation/media/uapi/v4l/v4l2.rst
index f52a11c949d3..1ee4b86d18e1 100644
--- a/Documentation/media/uapi/v4l/v4l2.rst
+++ b/Documentation/media/uapi/v4l/v4l2.rst
@@ -31,6 +31,7 @@ This part describes the Video for Linux API version 2 (V4L2 API) specification.
videodev
capture-example
v4l2grab-example
+ glossary
biblio
--
2.13.5
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