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Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml')
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1 files changed, 0 insertions, 343 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml deleted file mode 100644 index 06952d7cc770..000000000000 --- a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml +++ /dev/null @@ -1,343 +0,0 @@ -<refentry id="vidioc-g-dv-timings"> - <refmeta> - <refentrytitle>ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_G_DV_TIMINGS</refname> - <refname>VIDIOC_S_DV_TIMINGS</refname> - <refname>VIDIOC_SUBDEV_G_DV_TIMINGS</refname> - <refname>VIDIOC_SUBDEV_S_DV_TIMINGS</refname> - <refpurpose>Get or set DV timings for input or output</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>struct v4l2_dv_timings *<parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Arguments</title> - - <variablelist> - <varlistentry> - <term><parameter>fd</parameter></term> - <listitem> - <para>&fd;</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>request</parameter></term> - <listitem> - <para>VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS, VIDIOC_SUBDEV_G_DV_TIMINGS, VIDIOC_SUBDEV_S_DV_TIMINGS</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - <para>To set DV timings for the input or output, applications use the -<constant>VIDIOC_S_DV_TIMINGS</constant> ioctl and to get the current timings, -applications use the <constant>VIDIOC_G_DV_TIMINGS</constant> ioctl. The detailed timing -information is filled in using the structure &v4l2-dv-timings;. These ioctls take -a pointer to the &v4l2-dv-timings; structure as argument. If the ioctl is not supported -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. If the current input or output does not support DV timings (e.g. if -&VIDIOC-ENUMINPUT; does not set the <constant>V4L2_IN_CAP_DV_TIMINGS</constant> flag), then -&ENODATA; is returned.</para> - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>This ioctl is not supported, or the -<constant>VIDIOC_S_DV_TIMINGS</constant> parameter was unsuitable.</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> - </listitem> - </varlistentry> - </variablelist> - - <table pgwide="1" frame="none" id="v4l2-bt-timings"> - <title>struct <structname>v4l2_bt_timings</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>width</structfield></entry> - <entry>Width of the active video in pixels.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>height</structfield></entry> - <entry>Height of the active video frame in lines. So for interlaced formats the - height of the active video in each field is <structfield>height</structfield>/2.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>interlaced</structfield></entry> - <entry>Progressive (0) or interlaced (1)</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>polarities</structfield></entry> - <entry>This is a bit mask that defines polarities of sync signals. -bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync polarity and bit 1 (V4L2_DV_HSYNC_POS_POL) is for horizontal sync polarity. If the bit is set -(1) it is positive polarity and if is cleared (0), it is negative polarity.</entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>pixelclock</structfield></entry> - <entry>Pixel clock in Hz. Ex. 74.25MHz->74250000</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>hfrontporch</structfield></entry> - <entry>Horizontal front porch in pixels</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>hsync</structfield></entry> - <entry>Horizontal sync length in pixels</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>hbackporch</structfield></entry> - <entry>Horizontal back porch in pixels</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>vfrontporch</structfield></entry> - <entry>Vertical front porch in lines. For interlaced formats this refers to the - odd field (aka field 1).</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>vsync</structfield></entry> - <entry>Vertical sync length in lines. For interlaced formats this refers to the - odd field (aka field 1).</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>vbackporch</structfield></entry> - <entry>Vertical back porch in lines. For interlaced formats this refers to the - odd field (aka field 1).</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>il_vfrontporch</structfield></entry> - <entry>Vertical front porch in lines for the even field (aka field 2) of - interlaced field formats. Must be 0 for progressive formats.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>il_vsync</structfield></entry> - <entry>Vertical sync length in lines for the even field (aka field 2) of - interlaced field formats. Must be 0 for progressive formats.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>il_vbackporch</structfield></entry> - <entry>Vertical back porch in lines for the even field (aka field 2) of - interlaced field formats. Must be 0 for progressive formats.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>standards</structfield></entry> - <entry>The video standard(s) this format belongs to. This will be filled in by - the driver. Applications must set this to 0. See <xref linkend="dv-bt-standards"/> - for a list of standards.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>flags</structfield></entry> - <entry>Several flags giving more information about the format. - See <xref linkend="dv-bt-flags"/> for a description of the flags. - </entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="v4l2-dv-timings"> - <title>struct <structname>v4l2_dv_timings</structname></title> - <tgroup cols="4"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>type</structfield></entry> - <entry></entry> - <entry>Type of DV timings as listed in <xref linkend="dv-timing-types"/>.</entry> - </row> - <row> - <entry>union</entry> - <entry><structfield></structfield></entry> - <entry></entry> - </row> - <row> - <entry></entry> - <entry>&v4l2-bt-timings;</entry> - <entry><structfield>bt</structfield></entry> - <entry>Timings defined by BT.656/1120 specifications</entry> - </row> - <row> - <entry></entry> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[32]</entry> - <entry></entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="dv-timing-types"> - <title>DV Timing types</title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>Timing type</entry> - <entry>value</entry> - <entry>Description</entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry></entry> - </row> - <row> - <entry>V4L2_DV_BT_656_1120</entry> - <entry>0</entry> - <entry>BT.656/1120 timings</entry> - </row> - </tbody> - </tgroup> - </table> - <table pgwide="1" frame="none" id="dv-bt-standards"> - <title>DV BT Timing standards</title> - <tgroup cols="2"> - &cs-str; - <tbody valign="top"> - <row> - <entry>Timing standard</entry> - <entry>Description</entry> - </row> - <row> - <entry></entry> - <entry></entry> - </row> - <row> - <entry>V4L2_DV_BT_STD_CEA861</entry> - <entry>The timings follow the CEA-861 Digital TV Profile standard</entry> - </row> - <row> - <entry>V4L2_DV_BT_STD_DMT</entry> - <entry>The timings follow the VESA Discrete Monitor Timings standard</entry> - </row> - <row> - <entry>V4L2_DV_BT_STD_CVT</entry> - <entry>The timings follow the VESA Coordinated Video Timings standard</entry> - </row> - <row> - <entry>V4L2_DV_BT_STD_GTF</entry> - <entry>The timings follow the VESA Generalized Timings Formula standard</entry> - </row> - </tbody> - </tgroup> - </table> - <table pgwide="1" frame="none" id="dv-bt-flags"> - <title>DV BT Timing flags</title> - <tgroup cols="2"> - &cs-str; - <tbody valign="top"> - <row> - <entry>Flag</entry> - <entry>Description</entry> - </row> - <row> - <entry></entry> - <entry></entry> - </row> - <row> - <entry>V4L2_DV_FL_REDUCED_BLANKING</entry> - <entry>CVT/GTF specific: the timings use reduced blanking (CVT) or the 'Secondary -GTF' curve (GTF). In both cases the horizontal and/or vertical blanking -intervals are reduced, allowing a higher resolution over the same -bandwidth. This is a read-only flag, applications must not set this. - </entry> - </row> - <row> - <entry>V4L2_DV_FL_CAN_REDUCE_FPS</entry> - <entry>CEA-861 specific: set for CEA-861 formats with a framerate that is a multiple -of six. These formats can be optionally played at 1 / 1.001 speed to -be compatible with 60 Hz based standards such as NTSC and PAL-M that use a framerate of -29.97 frames per second. If the transmitter can't generate such frequencies, then the -flag will also be cleared. This is a read-only flag, applications must not set this. - </entry> - </row> - <row> - <entry>V4L2_DV_FL_REDUCED_FPS</entry> - <entry>CEA-861 specific: only valid for video transmitters, the flag is cleared -by receivers. It is also only valid for formats with the V4L2_DV_FL_CAN_REDUCE_FPS flag -set, for other formats the flag will be cleared by the driver. - -If the application sets this flag, then the pixelclock used to set up the transmitter is -divided by 1.001 to make it compatible with NTSC framerates. If the transmitter -can't generate such frequencies, then the flag will also be cleared. - </entry> - </row> - <row> - <entry>V4L2_DV_FL_HALF_LINE</entry> - <entry>Specific to interlaced formats: if set, then the vertical frontporch -of field 1 (aka the odd field) is really one half-line longer and the vertical backporch -of field 2 (aka the even field) is really one half-line shorter, so each field has exactly -the same number of half-lines. Whether half-lines can be detected or used depends on -the hardware. - </entry> - </row> - <row> - <entry>V4L2_DV_FL_IS_CE_VIDEO</entry> - <entry>If set, then this is a Consumer Electronics (CE) video format. -Such formats differ from other formats (commonly called IT formats) in that if -R'G'B' encoding is used then by default the R'G'B' values use limited range -(i.e. 16-235) as opposed to full range (i.e. 0-255). All formats defined in CEA-861 -except for the 640x480p59.94 format are CE formats. - </entry> - </row> - </tbody> - </tgroup> - </table> - </refsect1> -</refentry> |