From a9bf24d26fd28acaed839977e1d050c468d5a55e Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Wed, 16 Sep 2009 10:24:52 -0300 Subject: staging-specs: Move xml entities to kernel Documentation/DocBook From: Mauro Carvalho Chehab kernel-sync: Priority: normal Signed-off-by: Mauro Carvalho Chehab --- .../DocBook/v4l/vidioc-log-status.xml | 58 ++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 linux/Documentation/DocBook/v4l/vidioc-log-status.xml (limited to 'linux/Documentation/DocBook/v4l/vidioc-log-status.xml') diff --git a/linux/Documentation/DocBook/v4l/vidioc-log-status.xml b/linux/Documentation/DocBook/v4l/vidioc-log-status.xml new file mode 100644 index 000000000..2634b7c88 --- /dev/null +++ b/linux/Documentation/DocBook/v4l/vidioc-log-status.xml @@ -0,0 +1,58 @@ + + + ioctl VIDIOC_LOG_STATUS + &manvol; + + + + VIDIOC_LOG_STATUS + Log driver status information + + + + + + int ioctl + int fd + int request + + + + + + Description + + As the video/audio devices become more complicated it +becomes harder to debug problems. When this ioctl is called the driver +will output the current device status to the kernel log. This is +particular useful when dealing with problems like no sound, no video +and incorrectly tuned channels. Also many modern devices autodetect +video and audio standards and this ioctl will report what the device +thinks what the standard is. Mismatches may give an indication where +the problem is. + + This ioctl is optional and not all drivers support it. It +was introduced in Linux 2.6.15. + + + + &return-value; + + + + EINVAL + + The driver does not support this ioctl. + + + + + + + -- cgit v1.2.3