As we now have a glossary, some terms used on open.rst require adjustments. Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> --- Documentation/media/uapi/v4l/open.rst | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/Documentation/media/uapi/v4l/open.rst b/Documentation/media/uapi/v4l/open.rst index bcfa654d5d71..e19295b6dafe 100644 --- a/Documentation/media/uapi/v4l/open.rst +++ b/Documentation/media/uapi/v4l/open.rst @@ -143,7 +143,7 @@ Related Devices Devices can support several functions. For example video capturing, VBI capturing and radio support. -The V4L2 API creates different nodes for each of these functions. +The V4L2 API creates different V4L2 device nodes for each of these functions. The V4L2 API was designed with the idea that one device node could support all functions. However, in practice this never worked: this @@ -153,17 +153,17 @@ switching a device node between different functions only works when using the streaming I/O API, not with the :ref:`read() <func-read>`/\ :ref:`write() <func-write>` API. -Today each device node supports just one function. +Today each V4L2 device node supports just one function. Besides video input or output the hardware may also support audio sampling or playback. If so, these functions are implemented as ALSA PCM devices with optional ALSA audio mixer devices. One problem with all these devices is that the V4L2 API makes no -provisions to find these related devices. Some really complex devices -use the Media Controller (see :ref:`media_controller`) which can be -used for this purpose. But most drivers do not use it, and while some -code exists that uses sysfs to discover related devices (see +provisions to find these related V4L2 device nodes. Some really complex +hardware use the Media Controller (see :ref:`media_controller`) which can +be used for this purpose. But several drivers do not use it, and while some +code exists that uses sysfs to discover related V4L2 device nodes (see libmedia_dev in the `v4l-utils <http://git.linuxtv.org/cgit.cgi/v4l-utils.git/>`__ git repository), there is no library yet that can provide a single API -- 2.13.5
