From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../DocBook/media/v4l/dev-teletext.xml | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 kernel/Documentation/DocBook/media/v4l/dev-teletext.xml (limited to 'kernel/Documentation/DocBook/media/v4l/dev-teletext.xml') diff --git a/kernel/Documentation/DocBook/media/v4l/dev-teletext.xml b/kernel/Documentation/DocBook/media/v4l/dev-teletext.xml new file mode 100644 index 000000000..bd21c64d7 --- /dev/null +++ b/kernel/Documentation/DocBook/media/v4l/dev-teletext.xml @@ -0,0 +1,29 @@ + Teletext Interface + + This interface was aimed at devices receiving and demodulating +Teletext data [, ], evaluating the +Teletext packages and storing formatted pages in cache memory. Such +devices are usually implemented as microcontrollers with serial +interface (I2C) 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/. (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 raw or +sliced VBI API. -- cgit 1.2.3-korg