diff options
Diffstat (limited to 'Documentation/DocBook')
| -rw-r--r-- | Documentation/DocBook/device-drivers.tmpl | 1 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/controls.xml | 58 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/media-ioc-g-topology.xml | 3 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/media-types.xml | 33 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml | 26 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml (renamed from Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml) | 106 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt-yuv444m.xml | 177 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt.xml | 3 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml | 14 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-querystd.xml | 10 |
10 files changed, 364 insertions, 67 deletions
diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl index cdd8b24db68d..cc303a2f641c 100644 --- a/Documentation/DocBook/device-drivers.tmpl +++ b/Documentation/DocBook/device-drivers.tmpl @@ -229,6 +229,7 @@ X!Isound/sound_firmware.c !Iinclude/media/v4l2-dv-timings.h !Iinclude/media/v4l2-event.h !Iinclude/media/v4l2-flash-led-class.h +!Iinclude/media/v4l2-mc.h !Iinclude/media/v4l2-mediabus.h !Iinclude/media/v4l2-mem2mem.h !Iinclude/media/v4l2-of.h diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index f13a429093f1..361040e6b0f4 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -2330,6 +2330,14 @@ vertical search range for motion estimation module in video encoder.</entry> </row> <row><entry></entry></row> + <row id="v4l2-mpeg-video-force-key-frame"> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME</constant> </entry> + <entry>button</entry> + </row><row><entry spanname="descr">Force a key frame for the next queued buffer. Applicable to encoders. +This is a general, codec-agnostic keyframe control.</entry> + </row> + + <row><entry></entry></row> <row> <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE</constant> </entry> <entry>integer</entry> @@ -5070,6 +5078,46 @@ interface and may change in the future.</para> </entry> </row> <row> + <entry spanname="id"><constant>V4L2_CID_DV_TX_IT_CONTENT_TYPE</constant></entry> + <entry id="v4l2-dv-content-type">enum v4l2_dv_it_content_type</entry> + </row> + <row><entry spanname="descr">Configures the IT Content Type + of the transmitted video. This information is sent over HDMI and DisplayPort connectors + as part of the AVI InfoFrame. The term 'IT Content' is used for content that originates + from a computer as opposed to content from a TV broadcast or an analog source. The + enum v4l2_dv_it_content_type defines the possible content types:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_DV_IT_CONTENT_TYPE_GRAPHICS</constant> </entry> + <entry>Graphics content. Pixel data should be passed unfiltered and without + analog reconstruction.</entry> + </row> + <row> + <entry><constant>V4L2_DV_IT_CONTENT_TYPE_PHOTO</constant> </entry> + <entry>Photo content. The content is derived from digital still pictures. + The content should be passed through with minimal scaling and picture + enhancements.</entry> + </row> + <row> + <entry><constant>V4L2_DV_IT_CONTENT_TYPE_CINEMA</constant> </entry> + <entry>Cinema content.</entry> + </row> + <row> + <entry><constant>V4L2_DV_IT_CONTENT_TYPE_GAME</constant> </entry> + <entry>Game content. Audio and video latency should be minimized.</entry> + </row> + <row> + <entry><constant>V4L2_DV_IT_CONTENT_TYPE_NO_ITC</constant> </entry> + <entry>No IT Content information is available and the ITC bit in the AVI + InfoFrame is set to 0.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row> <entry spanname="id"><constant>V4L2_CID_DV_RX_POWER_PRESENT</constant></entry> <entry>bitmask</entry> </row> @@ -5098,6 +5146,16 @@ interface and may change in the future.</para> This control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors. </entry> </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_RX_IT_CONTENT_TYPE</constant></entry> + <entry>enum v4l2_dv_it_content_type</entry> + </row> + <row><entry spanname="descr">Reads the IT Content Type + of the received video. This information is sent over HDMI and DisplayPort connectors + as part of the AVI InfoFrame. The term 'IT Content' is used for content that originates + from a computer as opposed to content from a TV broadcast or an analog source. See + <constant>V4L2_CID_DV_TX_IT_CONTENT_TYPE</constant> for the available content types.</entry> + </row> <row><entry></entry></row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml b/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml index 63152ab9efba..e0d49fa329f0 100644 --- a/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml +++ b/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml @@ -48,9 +48,6 @@ <refsect1> <title>Description</title> - - <para><emphasis role="bold">NOTE:</emphasis> This new ioctl is programmed to be added on Kernel 4.6. Its definition/arguments may change until its final version.</para> - <para>The typical usage of this ioctl is to call it twice. On the first call, the structure defined at &media-v2-topology; should be zeroed. At return, if no errors happen, this ioctl will return the diff --git a/Documentation/DocBook/media/v4l/media-types.xml b/Documentation/DocBook/media/v4l/media-types.xml index 1af384250910..8b4fa39cf611 100644 --- a/Documentation/DocBook/media/v4l/media-types.xml +++ b/Documentation/DocBook/media/v4l/media-types.xml @@ -57,10 +57,6 @@ <entry>Connector for a RGB composite signal.</entry> </row> <row> - <entry><constant>MEDIA_ENT_F_CONN_TEST</constant></entry> - <entry>Connector for a test generator.</entry> - </row> - <row> <entry><constant>MEDIA_ENT_F_CAM_SENSOR</constant></entry> <entry>Camera video sensor entity.</entry> </row> @@ -84,7 +80,34 @@ </row> <row> <entry><constant>MEDIA_ENT_F_TUNER</constant></entry> - <entry>Digital TV, analog TV, radio and/or software radio tuner.</entry> + <entry>Digital TV, analog TV, radio and/or software radio tuner, + with consists on a PLL tuning stage that converts radio + frequency (RF) signal into an Intermediate Frequency (IF). + Modern tuners have internally IF-PLL decoders for audio + and video, but older models have those stages implemented + on separate entities. + </entry> + </row> + <row> + <entry><constant>MEDIA_ENT_F_IF_VID_DECODER</constant></entry> + <entry>IF-PLL video decoder. It receives the IF from a PLL + and decodes the analog TV video signal. This is commonly + found on some very old analog tuners, like Philips MK3 + designs. They all contain a tda9887 (or some software + compatible similar chip, like tda9885). Those devices + use a different I2C address than the tuner PLL. + </entry> + </row> + <row> + <entry><constant>MEDIA_ENT_F_IF_AUD_DECODER</constant></entry> + <entry>IF-PLL sound decoder. It receives the IF from a PLL + and decodes the analog TV audio signal. This is commonly + found on some very old analog hardware, like Micronas + msp3400, Philips tda9840, tda985x, etc. Those devices + use a different I2C address than the tuner PLL and + should be controlled together with the IF-PLL video + decoder. + </entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml index e781cc61786c..7d13fe96657d 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml @@ -1,35 +1,43 @@ - <refentry id="V4L2-PIX-FMT-YUV420M"> + <refentry> <refmeta> - <refentrytitle>V4L2_PIX_FMT_YUV420M ('YM12')</refentrytitle> + <refentrytitle>V4L2_PIX_FMT_YUV420M ('YM12'), V4L2_PIX_FMT_YVU420M ('YM21')</refentrytitle> &manvol; </refmeta> <refnamediv> - <refname> <constant>V4L2_PIX_FMT_YUV420M</constant></refname> - <refpurpose>Variation of <constant>V4L2_PIX_FMT_YUV420</constant> - with planes non contiguous in memory. </refpurpose> + <refname id="V4L2-PIX-FMT-YUV420M"><constant>V4L2_PIX_FMT_YUV420M</constant></refname> + <refname id="V4L2-PIX-FMT-YVU420M"><constant>V4L2_PIX_FMT_YVU420M</constant></refname> + <refpurpose>Variation of <constant>V4L2_PIX_FMT_YUV420</constant> and + <constant>V4L2_PIX_FMT_YVU420</constant> with planes non contiguous + in memory.</refpurpose> </refnamediv> <refsect1> <title>Description</title> <para>This is a multi-planar format, as opposed to a packed format. -The three components are separated into three sub- images or planes. +The three components are separated into three sub-images or planes.</para> -The Y plane is first. The Y plane has one byte per pixel. The Cb data + <para>The Y plane is first. The Y plane has one byte per pixel. +For <constant>V4L2_PIX_FMT_YUV420M</constant> the Cb data constitutes the second plane which is half the width and half the height of the Y plane (and of the image). Each Cb belongs to four pixels, a two-by-two square of the image. For example, Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>, Y'<subscript>01</subscript>, Y'<subscript>10</subscript>, and Y'<subscript>11</subscript>. The Cr data, just like the Cb plane, is -in the third plane. </para> +in the third plane.</para> + + <para><constant>V4L2_PIX_FMT_YVU420M</constant> is the same except +the Cr data is stored in the second plane and the Cb data in the third plane. +</para> <para>If the Y plane has pad bytes after each row, then the Cb and Cr planes have half as many pad bytes after their rows. In other words, two Cx rows (including padding) is exactly as long as one Y row (including padding).</para> - <para><constant>V4L2_PIX_FMT_YUV420M</constant> is intended to be + <para><constant>V4L2_PIX_FMT_YUV420M</constant> and +<constant>V4L2_PIX_FMT_YVU420M</constant> are intended to be used only in drivers and applications that support the multi-planar API, described in <xref linkend="planar-apis"/>. </para> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml index 2330667907c7..dd502802cb75 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml @@ -1,40 +1,45 @@ - <refentry id="V4L2-PIX-FMT-YVU420M"> + <refentry> <refmeta> - <refentrytitle>V4L2_PIX_FMT_YVU420M ('YM21')</refentrytitle> + <refentrytitle>V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61')</refentrytitle> &manvol; </refmeta> <refnamediv> - <refname> <constant>V4L2_PIX_FMT_YVU420M</constant></refname> - <refpurpose>Variation of <constant>V4L2_PIX_FMT_YVU420</constant> - with planes non contiguous in memory. </refpurpose> + <refname id="V4L2-PIX-FMT-YUV422M"><constant>V4L2_PIX_FMT_YUV422M</constant></refname> + <refname id="V4L2-PIX-FMT-YVU422M"><constant>V4L2_PIX_FMT_YVU422M</constant></refname> + <refpurpose>Planar formats with ½ horizontal resolution, also + known as YUV and YVU 4:2:2</refpurpose> </refnamediv> <refsect1> <title>Description</title> <para>This is a multi-planar format, as opposed to a packed format. -The three components are separated into three sub-images or planes. +The three components are separated into three sub-images or planes.</para> -The Y plane is first. The Y plane has one byte per pixel. The Cr data -constitutes the second plane which is half the width and half -the height of the Y plane (and of the image). Each Cr belongs to four -pixels, a two-by-two square of the image. For example, -Cr<subscript>0</subscript> belongs to Y'<subscript>00</subscript>, -Y'<subscript>01</subscript>, Y'<subscript>10</subscript>, and -Y'<subscript>11</subscript>. The Cb data, just like the Cr plane, constitutes -the third plane. </para> + <para>The Y plane is first. The Y plane has one byte per pixel. +For <constant>V4L2_PIX_FMT_YUV422M</constant> the Cb data +constitutes the second plane which is half the width of the Y plane (and of the +image). Each Cb belongs to two pixels. For example, +Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>, +Y'<subscript>01</subscript>. The Cr data, just like the Cb plane, is +in the third plane. </para> - <para>If the Y plane has pad bytes after each row, then the Cr -and Cb planes have half as many pad bytes after their rows. In other + <para><constant>V4L2_PIX_FMT_YVU422M</constant> is the same except +the Cr data is stored in the second plane and the Cb data in the third plane. +</para> + + <para>If the Y plane has pad bytes after each row, then the Cb +and Cr planes have half as many pad bytes after their rows. In other words, two Cx rows (including padding) is exactly as long as one Y row (including padding).</para> - <para><constant>V4L2_PIX_FMT_YVU420M</constant> is intended to be + <para><constant>V4L2_PIX_FMT_YUV422M</constant> and +<constant>V4L2_PIX_FMT_YVU422M</constant> are intended to be used only in drivers and applications that support the multi-planar API, described in <xref linkend="planar-apis"/>. </para> <example> - <title><constant>V4L2_PIX_FMT_YVU420M</constant> 4 × 4 + <title><constant>V4L2_PIX_FMT_YUV422M</constant> 4 × 4 pixel image</title> <formalpara> @@ -75,24 +80,44 @@ pixel image</title> <row><entry></entry></row> <row> <entry>start1 + 0:</entry> - <entry>Cr<subscript>00</subscript></entry> - <entry>Cr<subscript>01</subscript></entry> + <entry>Cb<subscript>00</subscript></entry> + <entry>Cb<subscript>01</subscript></entry> </row> <row> <entry>start1 + 2:</entry> - <entry>Cr<subscript>10</subscript></entry> - <entry>Cr<subscript>11</subscript></entry> + <entry>Cb<subscript>10</subscript></entry> + <entry>Cb<subscript>11</subscript></entry> + </row> + <row> + <entry>start1 + 4:</entry> + <entry>Cb<subscript>20</subscript></entry> + <entry>Cb<subscript>21</subscript></entry> + </row> + <row> + <entry>start1 + 6:</entry> + <entry>Cb<subscript>30</subscript></entry> + <entry>Cb<subscript>31</subscript></entry> </row> <row><entry></entry></row> <row> <entry>start2 + 0:</entry> - <entry>Cb<subscript>00</subscript></entry> - <entry>Cb<subscript>01</subscript></entry> + <entry>Cr<subscript>00</subscript></entry> + <entry>Cr<subscript>01</subscript></entry> </row> <row> <entry>start2 + 2:</entry> - <entry>Cb<subscript>10</subscript></entry> - <entry>Cb<subscript>11</subscript></entry> + <entry>Cr<subscript>10</subscript></entry> + <entry>Cr<subscript>11</subscript></entry> + </row> + <row> + <entry>start2 + 4:</entry> + <entry>Cr<subscript>20</subscript></entry> + <entry>Cr<subscript>21</subscript></entry> + </row> + <row> + <entry>start2 + 6:</entry> + <entry>Cr<subscript>30</subscript></entry> + <entry>Cr<subscript>31</subscript></entry> </row> </tbody> </tgroup> @@ -113,36 +138,23 @@ pixel image</title> </row> <row> <entry>0</entry> - <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> - <entry>Y</entry><entry></entry><entry>Y</entry> - </row> - <row> - <entry></entry> - <entry></entry><entry>C</entry><entry></entry><entry></entry> - <entry></entry><entry>C</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> </row> <row> <entry>1</entry> - <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> - <entry>Y</entry><entry></entry><entry>Y</entry> - </row> - <row> - <entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> </row> <row> <entry>2</entry> - <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> - <entry>Y</entry><entry></entry><entry>Y</entry> - </row> - <row> - <entry></entry> - <entry></entry><entry>C</entry><entry></entry><entry></entry> - <entry></entry><entry>C</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> </row> <row> <entry>3</entry> - <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> - <entry>Y</entry><entry></entry><entry>Y</entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv444m.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv444m.xml new file mode 100644 index 000000000000..1b7335940bc7 --- /dev/null +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv444m.xml @@ -0,0 +1,177 @@ + <refentry> + <refmeta> + <refentrytitle>V4L2_PIX_FMT_YUV444M ('YM24'), V4L2_PIX_FMT_YVU444M ('YM42')</refentrytitle> + &manvol; + </refmeta> + <refnamediv> + <refname id="V4L2-PIX-FMT-YUV444M"><constant>V4L2_PIX_FMT_YUV444M</constant></refname> + <refname id="V4L2-PIX-FMT-YVU444M"><constant>V4L2_PIX_FMT_YVU444M</constant></refname> + <refpurpose>Planar formats with full horizontal resolution, also + known as YUV and YVU 4:4:4</refpurpose> + </refnamediv> + + <refsect1> + <title>Description</title> + + <para>This is a multi-planar format, as opposed to a packed format. +The three components are separated into three sub-images or planes.</para> + + <para>The Y plane is first. The Y plane has one byte per pixel. +For <constant>V4L2_PIX_FMT_YUV444M</constant> the Cb data +constitutes the second plane which is the same width and height as the Y plane +(and as the image). The Cr data, just like the Cb plane, is in the third plane. +</para> + + <para><constant>V4L2_PIX_FMT_YVU444M</constant> is the same except +the Cr data is stored in the second plane and the Cb data in the third plane. +</para> + <para>If the Y plane has pad bytes after each row, then the Cb +and Cr planes have the same number of pad bytes after their rows.</para> + + <para><constant>V4L2_PIX_FMT_YUV444M</constant> and +<constant>V4L2_PIX_FMT_YUV444M</constant> are intended to be +used only in drivers and applications that support the multi-planar API, +described in <xref linkend="planar-apis"/>. </para> + + <example> + <title><constant>V4L2_PIX_FMT_YUV444M</constant> 4 × 4 +pixel image</title> + + <formalpara> + <title>Byte Order.</title> + <para>Each cell is one byte. + <informaltable frame="none"> + <tgroup cols="5" align="center"> + <colspec align="left" colwidth="2*" /> + <tbody valign="top"> + <row> + <entry>start0 + 0:</entry> + <entry>Y'<subscript>00</subscript></entry> + <entry>Y'<subscript>01</subscript></entry> + <entry>Y'<subscript>02</subscript></entry> + <entry>Y'<subscript>03</subscript></entry> + </row> + <row> + <entry>start0 + 4:</entry> + <entry>Y'<subscript>10</subscript></entry> + <entry>Y'<subscript>11</subscript></entry> + <entry>Y'<subscript>12</subscript></entry> + <entry>Y'<subscript>13</subscript></entry> + </row> + <row> + <entry>start0 + 8:</entry> + <entry>Y'<subscript>20</subscript></entry> + <entry>Y'<subscript>21</subscript></entry> + <entry>Y'<subscript>22</subscript></entry> + <entry>Y'<subscript>23</subscript></entry> + </row> + <row> + <entry>start0 + 12:</entry> + <entry>Y'<subscript>30</subscript></entry> + <entry>Y'<subscript>31</subscript></entry> + <entry>Y'<subscript>32</subscript></entry> + <entry>Y'<subscript>33</subscript></entry> + </row> + <row><entry></entry></row> + <row> + <entry>start1 + 0:</entry> + <entry>Cb<subscript>00</subscript></entry> + <entry>Cb<subscript>01</subscript></entry> + <entry>Cb<subscript>02</subscript></entry> + <entry>Cb<subscript>03</subscript></entry> + </row> + <row> + <entry>start1 + 4:</entry> + <entry>Cb<subscript>10</subscript></entry> + <entry>Cb<subscript>11</subscript></entry> + <entry>Cb<subscript>12</subscript></entry> + <entry>Cb<subscript>13</subscript></entry> + </row> + <row> + <entry>start1 + 8:</entry> + <entry>Cb<subscript>20</subscript></entry> + <entry>Cb<subscript>21</subscript></entry> + <entry>Cb<subscript>22</subscript></entry> + <entry>Cb<subscript>23</subscript></entry> + </row> + <row> + <entry>start1 + 12:</entry> + <entry>Cb<subscript>20</subscript></entry> + <entry>Cb<subscript>21</subscript></entry> + <entry>Cb<subscript>32</subscript></entry> + <entry>Cb<subscript>33</subscript></entry> + </row> + <row><entry></entry></row> + <row> + <entry>start2 + 0:</entry> + <entry>Cr<subscript>00</subscript></entry> + <entry>Cr<subscript>01</subscript></entry> + <entry>Cr<subscript>02</subscript></entry> + <entry>Cr<subscript>03</subscript></entry> + </row> + <row> + <entry>start2 + 4:</entry> + <entry>Cr<subscript>10</subscript></entry> + <entry>Cr<subscript>11</subscript></entry> + <entry>Cr<subscript>12</subscript></entry> + <entry>Cr<subscript>13</subscript></entry> + </row> + <row> + <entry>start2 + 8:</entry> + <entry>Cr<subscript>20</subscript></entry> + <entry>Cr<subscript>21</subscript></entry> + <entry>Cr<subscript>22</subscript></entry> + <entry>Cr<subscript>23</subscript></entry> + </row> + <row> + <entry>start2 + 12:</entry> + <entry>Cr<subscript>30</subscript></entry> + <entry>Cr<subscript>31</subscript></entry> + <entry>Cr<subscript>32</subscript></entry> + <entry>Cr<subscript>33</subscript></entry> + </row> + </tbody> + </tgroup> + </informaltable> + </para> + </formalpara> + + <formalpara> + <title>Color Sample Location.</title> + <para> + <informaltable frame="none"> + <tgroup cols="7" align="center"> + <tbody valign="top"> + <row> + <entry></entry> + <entry>0</entry><entry></entry><entry>1</entry><entry></entry> + <entry>2</entry><entry></entry><entry>3</entry> + </row> + <row> + <entry>0</entry> + <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry> + <entry>YC</entry><entry></entry><entry>YC</entry> + </row> + <row> + <entry>1</entry> + <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry> + <entry>YC</entry><entry></entry><entry>YC</entry> + </row> + <row> + <entry>2</entry> + <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry> + <entry>YC</entry><entry></entry><entry>YC</entry> + </row> + <row> + <entry>3</entry> + <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry> + <entry>YC</entry><entry></entry><entry>YC</entry> + </row> + </tbody> + </tgroup> + </informaltable> + </para> + </formalpara> + </example> + </refsect1> + </refentry> diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml index d871245d2973..2f02f9441443 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -1628,7 +1628,8 @@ information.</para> &sub-y41p; &sub-yuv420; &sub-yuv420m; - &sub-yvu420m; + &sub-yuv422m; + &sub-yuv444m; &sub-yuv410; &sub-yuv422p; &sub-yuv411p; diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml index e9c70a8f3476..0c93677d16b4 100644 --- a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml +++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml @@ -60,9 +60,19 @@ input</refpurpose> automatically, similar to sensing the video standard. To do so, applications call <constant>VIDIOC_QUERY_DV_TIMINGS</constant> with a pointer to a &v4l2-dv-timings;. Once the hardware detects the timings, it will fill in the -timings structure. +timings structure.</para> -If the timings could not be detected because there was no signal, then +<para>Please note that drivers shall <emphasis>not</emphasis> switch timings automatically +if new timings are detected. Instead, drivers should send the +<constant>V4L2_EVENT_SOURCE_CHANGE</constant> event (if they support this) and expect +that userspace will take action by calling <constant>VIDIOC_QUERY_DV_TIMINGS</constant>. +The reason is that new timings usually mean different buffer sizes as well, and you +cannot change buffer sizes on the fly. In general, applications that receive the +Source Change event will have to call <constant>VIDIOC_QUERY_DV_TIMINGS</constant>, +and if the detected timings are valid they will have to stop streaming, set the new +timings, allocate new buffers and start streaming again.</para> + +<para>If the timings could not be detected because there was no signal, then <errorcode>ENOLINK</errorcode> is returned. If a signal was detected, but it was unstable and the receiver could not lock to the signal, then <errorcode>ENOLCK</errorcode> is returned. If the receiver could lock to the signal, diff --git a/Documentation/DocBook/media/v4l/vidioc-querystd.xml b/Documentation/DocBook/media/v4l/vidioc-querystd.xml index 222348542182..3ceae35fab03 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querystd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querystd.xml @@ -59,6 +59,16 @@ then the driver will return V4L2_STD_UNKNOWN. When detection is not possible or fails, the set must contain all standards supported by the current video input or output.</para> +<para>Please note that drivers shall <emphasis>not</emphasis> switch the video standard +automatically if a new video standard is detected. Instead, drivers should send the +<constant>V4L2_EVENT_SOURCE_CHANGE</constant> event (if they support this) and expect +that userspace will take action by calling <constant>VIDIOC_QUERYSTD</constant>. +The reason is that a new video standard can mean different buffer sizes as well, and you +cannot change buffer sizes on the fly. In general, applications that receive the +Source Change event will have to call <constant>VIDIOC_QUERYSTD</constant>, +and if the detected video standard is valid they will have to stop streaming, set the new +standard, allocate new buffers and start streaming again.</para> + </refsect1> <refsect1> |