diff options
author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-09-14 11:44:20 +0200 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-09-26 14:46:39 +0200 |
commit | 663dc7f3a02712e22ef81f4c7b7b1caecceb8e4f (patch) | |
tree | dd5ccbbd1f8c35503828de677d84a52845b1a78f /Documentation | |
parent | [media] v4l2: remove experimental tag from a number of old drivers (diff) | |
download | linux-663dc7f3a02712e22ef81f4c7b7b1caecceb8e4f.tar.xz linux-663dc7f3a02712e22ef81f4c7b7b1caecceb8e4f.zip |
[media] DocBook: document when to return ENODATA
ENODATA should be returned if the API used for getting, changing, querying
or enumerating the current video timings is not supported by the current input
or output.
This was decided during the 2012 Media Workshop.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation')
9 files changed, 65 insertions, 8 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml index 509f0012d2a6..fced5fb0dbf0 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml @@ -229,6 +229,12 @@ intended for the user.</entry> is out of bounds.</para> </listitem> </varlistentry> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Digital video presets are not supported for this input or output.</para> + </listitem> + </varlistentry> </variablelist> </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml index 24c3bf4fd29a..b3e17c1dfaf5 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml @@ -106,6 +106,12 @@ application.</entry> is out of bounds.</para> </listitem> </varlistentry> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Digital video presets are not supported for this input or output.</para> + </listitem> + </varlistentry> </variablelist> </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-enumstd.xml b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml index 3a5fc5405f96..8065099401d1 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enumstd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml @@ -378,6 +378,12 @@ system)</para></footnote></para></entry> is out of bounds.</para> </listitem> </varlistentry> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Standard video timings are not supported for this input or output.</para> + </listitem> + </varlistentry> </variablelist> </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml index 61be9fa3803a..b9ea37634f6c 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml @@ -78,6 +78,12 @@ If the preset is not supported, it returns an &EINVAL; </para> </listitem> </varlistentry> <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Digital video presets are not supported for this input or output.</para> + </listitem> + </varlistentry> + <varlistentry> <term><errorcode>EBUSY</errorcode></term> <listitem> <para>The device is busy and therefore can not change the preset.</para> @@ -104,7 +110,4 @@ If the preset is not supported, it returns an &EINVAL; </para> </tgroup> </table> </refsect1> - <refsect1> - &return-value; - </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml index eda1a2991bbe..feaa18072e81 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml @@ -56,7 +56,9 @@ a pointer to the &v4l2-dv-timings; structure as argument. If the ioctl is not su or the timing values are not correct, the driver returns &EINVAL;.</para> <para>The <filename>linux/v4l2-dv-timings.h</filename> header can be used to get the timings of the formats in the <xref linkend="cea861" /> and <xref linkend="vesadmt" /> -standards.</para> +standards. If the current input or output does not support DV timings (e.g. if +&VIDIOC-ENUMINPUT; does not set the <constant>V4L2_IN_CAP_CUSTOM_TIMINGS</constant> flag), then +&ENODATA; is returned.</para> </refsect1> <refsect1> @@ -71,6 +73,12 @@ standards.</para> </listitem> </varlistentry> <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Digital video timings are not supported for this input or output.</para> + </listitem> + </varlistentry> + <varlistentry> <term><errorcode>EBUSY</errorcode></term> <listitem> <para>The device is busy and therefore can not change the timings.</para> @@ -320,7 +328,4 @@ detected or used depends on the hardware. </tgroup> </table> </refsect1> - <refsect1> - &return-value; - </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-std.xml b/Documentation/DocBook/media/v4l/vidioc-g-std.xml index 99ff1a016220..4a898417de28 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-std.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-std.xml @@ -72,7 +72,9 @@ flags, being a write-only ioctl it does not return the actual new standard as the current input does not support the requested standard the driver returns an &EINVAL;. When the standard set is ambiguous drivers may return <errorcode>EINVAL</errorcode> or choose any of the requested -standards.</para> +standards. If the current input or output does not support standard video timings (e.g. if +&VIDIOC-ENUMINPUT; does not set the <constant>V4L2_IN_CAP_STD</constant> flag), then +&ENODATA; is returned.</para> </refsect1> <refsect1> @@ -85,6 +87,12 @@ standards.</para> <para>The <constant>VIDIOC_S_STD</constant> parameter was unsuitable.</para> </listitem> </varlistentry> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Standard video timings are not supported for this input or output.</para> + </listitem> + </varlistentry> </variablelist> </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml index 1bc8aeb3ff1f..68b49d09e245 100644 --- a/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml +++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml @@ -65,5 +65,14 @@ returned.</para> <refsect1> &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Digital video presets are not supported for this input or output.</para> + </listitem> + </varlistentry> + </variablelist> </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml index 44935a0ffcf0..e185f149e0a1 100644 --- a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml +++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml @@ -78,6 +78,12 @@ capabilities in order to give more precise feedback to the user. <variablelist> <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Digital video timings are not supported for this input or output.</para> + </listitem> + </varlistentry> + <varlistentry> <term><errorcode>ENOLINK</errorcode></term> <listitem> <para>No timings could be detected because no signal was found. diff --git a/Documentation/DocBook/media/v4l/vidioc-querystd.xml b/Documentation/DocBook/media/v4l/vidioc-querystd.xml index 4b79c7c04ed6..fe80a183d957 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querystd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querystd.xml @@ -62,5 +62,13 @@ current video input or output.</para> <refsect1> &return-value; + <variablelist> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>Standard video timings are not supported for this input or output.</para> + </listitem> + </varlistentry> + </variablelist> </refsect1> </refentry> |