diff options
| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2019-01-22 09:27:26 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-01-25 18:49:43 -0200 |
| commit | 0b7a4b41ab0e4209c0744442231976448ea3b2d3 (patch) | |
| tree | 944c84995a9e998b37df62fbd9db3731f02502f1 /Documentation/media | |
| parent | b4ba92d56b4f8ea692a5aaa4b0054824aa6fe47c (diff) | |
media: dev-teletext.rst: remove obsolete teletext interface
The teletext interface has been dead for years now, just
remove it.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'Documentation/media')
| -rw-r--r-- | Documentation/media/uapi/v4l/dev-teletext.rst | 41 | ||||
| -rw-r--r-- | Documentation/media/uapi/v4l/devices.rst | 1 |
2 files changed, 0 insertions, 42 deletions
diff --git a/Documentation/media/uapi/v4l/dev-teletext.rst b/Documentation/media/uapi/v4l/dev-teletext.rst deleted file mode 100644 index 35e8c4b35458..000000000000 --- a/Documentation/media/uapi/v4l/dev-teletext.rst +++ /dev/null @@ -1,41 +0,0 @@ -.. 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. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _ttx: - -****************** -Teletext Interface -****************** - -This interface was aimed at devices receiving and demodulating Teletext -data [:ref:`ets300706`, :ref:`itu653`], evaluating the Teletext -packages and storing formatted pages in cache memory. Such devices are -usually implemented as microcontrollers with serial interface -(I\ :sup:`2`\ C) and could be found on old TV cards, dedicated Teletext -decoding cards and home-brew devices connected to the PC parallel port. - -The Teletext API was designed by Martin Buck. It was defined in the -kernel header file ``linux/videotext.h``, the specification is available -from -`ftp://ftp.gwdg.de/pub/linux/misc/videotext/ <ftp://ftp.gwdg.de/pub/linux/misc/videotext/>`__. -(Videotext is the name of the German public television Teletext -service.) - -Eventually the Teletext API was integrated into the V4L API with -character device file names ``/dev/vtx0`` to ``/dev/vtx31``, device -major number 81, minor numbers 192 to 223. - -However, teletext decoders were quickly replaced by more generic VBI -demodulators and those dedicated teletext decoders no longer exist. For -many years the vtx devices were still around, even though nobody used -them. So the decision was made to finally remove support for the -Teletext API in kernel 2.6.37. - -Modern devices all use the :ref:`raw <raw-vbi>` or -:ref:`sliced` VBI API. diff --git a/Documentation/media/uapi/v4l/devices.rst b/Documentation/media/uapi/v4l/devices.rst index c959c0443c2f..d6fcf3db5909 100644 --- a/Documentation/media/uapi/v4l/devices.rst +++ b/Documentation/media/uapi/v4l/devices.rst @@ -24,7 +24,6 @@ Interfaces dev-codec dev-raw-vbi dev-sliced-vbi - dev-teletext dev-radio dev-rds dev-sdr |