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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-05-09 13:54:46 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-06-01 08:20:21 +0400 |
| commit | f1158af2b2e064532470516943511863a873c5e5 (patch) | |
| tree | b8c62df367ed521e144e5c921e34be38b58e02e5 | |
| parent | 51ff9ef13366b3752a8ab6229c466fd1bd671d3a (diff) | |
| download | linux-f1158af2b2e064532470516943511863a873c5e5.tar.xz | |
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: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | Documentation/DocBook/v4l/vidioc-query-dv-preset.xml | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/DocBook/v4l/vidioc-query-dv-preset.xml b/Documentation/DocBook/v4l/vidioc-query-dv-preset.xml index 87e4f0f6151c..402229ee06f6 100644 --- a/Documentation/DocBook/v4l/vidioc-query-dv-preset.xml +++ b/Documentation/DocBook/v4l/vidioc-query-dv-preset.xml @@ -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> |