[PATCH v9 4/5] media: glossary.rst: add terms for MC-centric video-node-centric

[Mauro Carvalho Chehab <mchehab+huawei@kernel.org>]

Now that we have a chapter describing hardware control, let's
add the terms used there to the glossary.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 .../userspace-api/media/glossary.rst          | 42 ++++++++++++++++---
 1 file changed, 37 insertions(+), 5 deletions(-)

diff --git a/Documentation/userspace-api/media/glossary.rst b/Documentation/userspace-api/media/glossary.rst
index 18a1ace00159..8cdb7900e994 100644
--- a/Documentation/userspace-api/media/glossary.rst
+++ b/Documentation/userspace-api/media/glossary.rst
@@ -69,6 +69,20 @@ Glossary
 
 	See https://en.wikipedia.org/wiki/Field-programmable_gate_array.
 
+    Hardware Component
+	A subset of the :term:`media hardware`. For example an :term:`I²C` or
+	:term:`SPI` device, or an :term:`IP block` inside a
+	:term:`SoC` or :term:`FPGA`.
+
+    Hardware Peripheral
+	A group of :term:`hardware components <hardware component>` that
+	together make a larger user-facing functional peripheral. For
+	instance the :term:`SoC` :term:`ISP` :term:`IP	block <ip block>`
+	and external camera sensors together make a camera hardware
+	peripheral.
+
+	Also known as :term:`peripheral`.
+
     I²C
 	**Inter-Integrated Circuit**
 
@@ -126,6 +140,14 @@ Glossary
 
 	See :ref:`media_controller`.
 
+    MC-Centric
+	:term:`V4L2 hardware` that requires a :term:`MC API`.
+
+	Such hardware have ``V4L2_CAP_IO_MC`` device_caps field unset
+	(see :ref:`VIDIOC_QUERYCAP`).
+
+	See :ref:`v4l2_hardware_control` for more details.
+
     Media Hardware
 	Subset of the hardware that is supported by the Linux Media API.
 
@@ -139,6 +161,9 @@ Glossary
 	control and input/output (I/O) operations specified by the
 	instructions on a single integrated circuit.
 
+    Peripheral
+	The same as :term:`hardware peripheral`.
+
     RC API
 	**Remote Controller API**
 
@@ -168,15 +193,22 @@ Glossary
 	The userspace API defined in :ref:`v4l2spec`, which is used to
 	control a V4L2 hardware.
 
+    V4L2 Device Node
+	A :term:`device node` that is associated to a V4L driver.
+
+	The V4L2 device node naming is specified at :ref:`v4l2_device_naming`.
+
     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`.
+	:term:`bridge driver`. See :ref:`subdev`.
 
-    V4L2 Sub-device API
-	Part of the :term:`V4L2 API` which control
-	:term:`V4L2 sub-devices <V4L2 Sub-device>`.
+    Video-node-Centric
+	V4L2 hardware that doesn't require a media controller to be used.
 
-	See :ref:`subdev`.
+	Such hardware have ``V4L2_CAP_IO_MC`` device_caps field unset
+	(see :ref:`VIDIOC_QUERYCAP`).
+
+	See :ref:`v4l2_hardware_control` for more details.
-- 
2.26.2