Commit f1158af2 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
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V4L/DVB: V4L2 Spec: Improve the VIDIOC_QUERY_DV_PRESET description 



Make explicit what should happen when the input signal is missing,
unreliable or does not map to a supported preset.

Signed-off-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 51ff9ef1

Documentation/DocBook/v4l/vidioc-query-dv-preset.xml

+4 −2
Original line number Diff line number Diff line
@@ -53,8 +53,10 @@ input</refpurpose> 
automatically, similar to sensing the video standard. To do so, applications

call <constant> VIDIOC_QUERY_DV_PRESET</constant> with a pointer to a

&v4l2-dv-preset; type. Once the hardware detects a preset, that preset is

returned in the preset field of &v4l2-dv-preset;. When detection is not

possible or fails, the value V4L2_DV_INVALID is returned.</para>

returned in the preset field of &v4l2-dv-preset;. If the preset could not be

detected because there was no signal, or the signal was unreliable, or the

signal did not map to a supported preset, then the value V4L2_DV_INVALID is

returned.</para>

  </refsect1>



  <refsect1>