diff options
Diffstat (limited to 'Documentation/DocBook/media/v4l')
43 files changed, 930 insertions, 431 deletions
diff --git a/Documentation/DocBook/media/v4l/biblio.xml b/Documentation/DocBook/media/v4l/biblio.xml index 1078e45..d2eb79e 100644 --- a/Documentation/DocBook/media/v4l/biblio.xml +++ b/Documentation/DocBook/media/v4l/biblio.xml @@ -178,23 +178,23 @@ Signal - NTSC for Studio Applications"</title> 1125-Line High-Definition Production"</title> </biblioentry> - <biblioentry id="en50067"> - <abbrev>EN 50067</abbrev> + <biblioentry id="iec62106"> + <abbrev>IEC 62106</abbrev> <authorgroup> - <corpauthor>European Committee for Electrotechnical Standardization -(<ulink url="http://www.cenelec.eu">http://www.cenelec.eu</ulink>)</corpauthor> + <corpauthor>International Electrotechnical Commission +(<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor> </authorgroup> <title>Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87,5 to 108,0 MHz</title> </biblioentry> <biblioentry id="nrsc4"> - <abbrev>NRSC-4</abbrev> + <abbrev>NRSC-4-B</abbrev> <authorgroup> <corpauthor>National Radio Systems Committee (<ulink url="http://www.nrscstandards.org">http://www.nrscstandards.org</ulink>)</corpauthor> </authorgroup> - <title>NRSC-4: United States RBDS Standard</title> + <title>NRSC-4-B: United States RBDS Standard</title> </biblioentry> <biblioentry id="iso12232"> @@ -226,4 +226,44 @@ in the frequency range from 87,5 to 108,0 MHz</title> <title>VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT)</title> </biblioentry> + <biblioentry id="vesaedid"> + <abbrev>EDID</abbrev> + <authorgroup> + <corpauthor>Video Electronics Standards Association +(<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor> + </authorgroup> + <title>VESA Enhanced Extended Display Identification Data Standard</title> + <subtitle>Release A, Revision 2</subtitle> + </biblioentry> + + <biblioentry id="hdcp"> + <abbrev>HDCP</abbrev> + <authorgroup> + <corpauthor>Digital Content Protection LLC +(<ulink url="http://www.digital-cp.com">http://www.digital-cp.com</ulink>)</corpauthor> + </authorgroup> + <title>High-bandwidth Digital Content Protection System</title> + <subtitle>Revision 1.3</subtitle> + </biblioentry> + + <biblioentry id="hdmi"> + <abbrev>HDMI</abbrev> + <authorgroup> + <corpauthor>HDMI Licensing LLC +(<ulink url="http://www.hdmi.org">http://www.hdmi.org</ulink>)</corpauthor> + </authorgroup> + <title>High-Definition Multimedia Interface</title> + <subtitle>Specification Version 1.4a</subtitle> + </biblioentry> + + <biblioentry id="dp"> + <abbrev>DP</abbrev> + <authorgroup> + <corpauthor>Video Electronics Standards Association +(<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor> + </authorgroup> + <title>VESA DisplayPort Standard</title> + <subtitle>Version 1, Revision 2</subtitle> + </biblioentry> + </bibliography> diff --git a/Documentation/DocBook/media/v4l/common.xml b/Documentation/DocBook/media/v4l/common.xml index b91d253..73c6847 100644 --- a/Documentation/DocBook/media/v4l/common.xml +++ b/Documentation/DocBook/media/v4l/common.xml @@ -564,7 +564,7 @@ automatically.</para> <para>To query and select the standard used by the current video input or output applications call the &VIDIOC-G-STD; and &VIDIOC-S-STD; ioctl, respectively. The <emphasis>received</emphasis> -standard can be sensed with the &VIDIOC-QUERYSTD; ioctl. Note parameter of all these ioctls is a pointer to a &v4l2-std-id; type (a standard set), <emphasis>not</emphasis> an index into the standard enumeration.<footnote> +standard can be sensed with the &VIDIOC-QUERYSTD; ioctl. Note that the parameter of all these ioctls is a pointer to a &v4l2-std-id; type (a standard set), <emphasis>not</emphasis> an index into the standard enumeration.<footnote> <para>An alternative to the current scheme is to use pointers to indices as arguments of <constant>VIDIOC_G_STD</constant> and <constant>VIDIOC_S_STD</constant>, the &v4l2-input; and @@ -588,30 +588,28 @@ switch to a standard by &v4l2-std-id;.</para> </footnote> Drivers must implement all video standard ioctls when the device has one or more video inputs or outputs.</para> - <para>Special rules apply to USB cameras where the notion of video -standards makes little sense. More generally any capture device, -output devices accordingly, which is <itemizedlist> + <para>Special rules apply to devices such as USB cameras where the notion of video +standards makes little sense. More generally for any capture or output device +which is: <itemizedlist> <listitem> <para>incapable of capturing fields or frames at the nominal rate of the video standard, or</para> </listitem> <listitem> - <para>where <link linkend="buffer">timestamps</link> refer -to the instant the field or frame was received by the driver, not the -capture time, or</para> - </listitem> - <listitem> - <para>where <link linkend="buffer">sequence numbers</link> -refer to the frames received by the driver, not the captured -frames.</para> + <para>that does not support the video standard formats at all.</para> </listitem> </itemizedlist> Here the driver shall set the <structfield>std</structfield> field of &v4l2-input; and &v4l2-output; -to zero, the <constant>VIDIOC_G_STD</constant>, +to zero and the <constant>VIDIOC_G_STD</constant>, <constant>VIDIOC_S_STD</constant>, <constant>VIDIOC_QUERYSTD</constant> and <constant>VIDIOC_ENUMSTD</constant> ioctls shall return the -&EINVAL;.<footnote> +&ENOTTY;.<footnote> + <para>See <xref linkend="buffer" /> for a rationale.</para> + <para>Applications can make use of the <xref linkend="input-capabilities" /> and +<xref linkend="output-capabilities"/> flags to determine whether the video standard ioctls +are available for the device.</para> +&ENOTTY;. <para>See <xref linkend="buffer" /> for a rationale. Probably even USB cameras follow some well known video standard. It might have been better to explicitly indicate elsewhere if a device cannot live @@ -626,9 +624,9 @@ up to normal expectations, instead of this exception.</para> &v4l2-standard; standard; if (-1 == ioctl (fd, &VIDIOC-G-STD;, &std_id)) { - /* Note when VIDIOC_ENUMSTD always returns EINVAL this + /* Note when VIDIOC_ENUMSTD always returns ENOTTY this is no video device or it falls under the USB exception, - and VIDIOC_G_STD returning EINVAL is no error. */ + and VIDIOC_G_STD returning ENOTTY is no error. */ perror ("VIDIOC_G_STD"); exit (EXIT_FAILURE); diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index faa0fd1..c6ae4c9 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -1476,7 +1476,7 @@ follows.<informaltable> </row> <row> <entry><constant>V4L2_BUF_TYPE_PRIVATE_BASE</constant></entry> - <entry><constant>V4L2_BUF_TYPE_PRIVATE</constant></entry> + <entry><constant>V4L2_BUF_TYPE_PRIVATE</constant> (but this is deprecated)</entry> </row> </tbody> </tgroup> @@ -2468,21 +2468,9 @@ that used it. It was originally scheduled for removal in 2.6.35. <structfield>reserved2</structfield> and removed <constant>V4L2_BUF_FLAG_INPUT</constant>.</para> </listitem> - </orderedlist> - </section> - - <section> - <title>V4L2 in Linux 3.6</title> - <orderedlist> <listitem> <para>Added V4L2_CAP_VIDEO_M2M and V4L2_CAP_VIDEO_M2M_MPLANE capabilities.</para> </listitem> - </orderedlist> - </section> - - <section> - <title>V4L2 in Linux 3.6</title> - <orderedlist> <listitem> <para>Added support for frequency band enumerations: &VIDIOC-ENUM-FREQ-BANDS;.</para> </listitem> @@ -2567,29 +2555,6 @@ and may change in the future.</para> <para>Video Output Overlay (OSD) Interface, <xref linkend="osd" />.</para> </listitem> - <listitem> - <para><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant>, - &v4l2-buf-type;, <xref linkend="v4l2-buf-type" />.</para> - </listitem> - <listitem> - <para><constant>V4L2_CAP_VIDEO_OUTPUT_OVERLAY</constant>, -&VIDIOC-QUERYCAP; ioctl, <xref linkend="device-capabilities" />.</para> - </listitem> - <listitem> - <para>&VIDIOC-ENUM-FRAMESIZES; and -&VIDIOC-ENUM-FRAMEINTERVALS; ioctls.</para> - </listitem> - <listitem> - <para>&VIDIOC-G-ENC-INDEX; ioctl.</para> - </listitem> - <listitem> - <para>&VIDIOC-ENCODER-CMD; and &VIDIOC-TRY-ENCODER-CMD; -ioctls.</para> - </listitem> - <listitem> - <para>&VIDIOC-DECODER-CMD; and &VIDIOC-TRY-DECODER-CMD; -ioctls.</para> - </listitem> <listitem> <para>&VIDIOC-DBG-G-REGISTER; and &VIDIOC-DBG-S-REGISTER; ioctls.</para> @@ -2615,10 +2580,6 @@ ioctls.</para> and &VIDIOC-SUBDEV-S-SELECTION; ioctls.</para> </listitem> <listitem> - <para><link linkend="v4l2-auto-focus-area"><constant> - V4L2_CID_AUTO_FOCUS_AREA</constant></link> control.</para> - </listitem> - <listitem> <para>Support for frequency band enumeration: &VIDIOC-ENUM-FREQ-BANDS; ioctl.</para> </listitem> </itemizedlist> diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index b0964fb..272a5f7 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -3505,7 +3505,7 @@ This encodes up to 31 pre-defined programme types.</entry> </row> <row><entry spanname="descr">Sets the Programme Service name (PS_NAME) for transmission. It is intended for static display on a receiver. It is the primary aid to listeners in programme service -identification and selection. In Annex E of <xref linkend="en50067" />, the RDS specification, +identification and selection. In Annex E of <xref linkend="iec62106" />, the RDS specification, there is a full description of the correct character encoding for Programme Service name strings. Also from RDS specification, PS is usually a single eight character text. However, it is also possible to find receivers which can scroll strings sized as 8 x N characters. So, this control must be configured @@ -3519,7 +3519,7 @@ with steps of 8 characters. The result is it must always contain a string with s what is being broadcasted. RDS Radio Text can be applied when broadcaster wishes to transmit longer PS names, programme-related information or any other text. In these cases, RadioText should be used in addition to <constant>V4L2_CID_RDS_TX_PS_NAME</constant>. The encoding for Radio Text strings is also fully described -in Annex E of <xref linkend="en50067" />. The length of Radio Text strings depends on which RDS Block is being +in Annex E of <xref linkend="iec62106" />. The length of Radio Text strings depends on which RDS Block is being used to transmit it, either 32 (2A block) or 64 (2B block). However, it is also possible to find receivers which can scroll strings sized as 32 x N or 64 x N characters. So, this control must be configured with steps of 32 or 64 characters. The result is it must always contain a string with size multiple of 32 or 64. </entry> @@ -3650,7 +3650,7 @@ manually or automatically if set to zero. Unit, range and step are driver-specif </table> <para>For more details about RDS specification, refer to -<xref linkend="en50067" /> document, from CENELEC.</para> +<xref linkend="iec62106" /> document, from CENELEC.</para> </section> <section id="flash-controls"> @@ -3717,232 +3717,231 @@ interface and may change in the future.</para> use case involving camera or individually. </para> - </section> + <table pgwide="1" frame="none" id="flash-control-id"> + <title>Flash Control IDs</title> + + <tgroup cols="4"> + <colspec colname="c1" colwidth="1*" /> + <colspec colname="c2" colwidth="6*" /> + <colspec colname="c3" colwidth="2*" /> + <colspec colname="c4" colwidth="6*" /> + <spanspec namest="c1" nameend="c2" spanname="id" /> + <spanspec namest="c2" nameend="c4" spanname="descr" /> + <thead> + <row> + <entry spanname="id" align="left">ID</entry> + <entry align="left">Type</entry> + </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry> + </row> + </thead> + <tbody valign="top"> + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_CLASS</constant></entry> + <entry>class</entry> + </row> + <row> + <entry spanname="descr">The FLASH class descriptor.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_LED_MODE</constant></entry> + <entry>menu</entry> + </row> + <row id="v4l2-flash-led-mode"> + <entry spanname="descr">Defines the mode of the flash LED, + the high-power white LED attached to the flash controller. + Setting this control may not be possible in presence of + some faults. See V4L2_CID_FLASH_FAULT.</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_FLASH_LED_MODE_NONE</constant></entry> + <entry>Off.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_LED_MODE_FLASH</constant></entry> + <entry>Flash mode.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_LED_MODE_TORCH</constant></entry> + <entry>Torch mode. See V4L2_CID_FLASH_TORCH_INTENSITY.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_SOURCE</constant></entry> + <entry>menu</entry> + </row> + <row id="v4l2-flash-strobe-source"><entry + spanname="descr">Defines the source of the flash LED + strobe.</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_FLASH_STROBE_SOURCE_SOFTWARE</constant></entry> + <entry>The flash strobe is triggered by using + the V4L2_CID_FLASH_STROBE control.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_STROBE_SOURCE_EXTERNAL</constant></entry> + <entry>The flash strobe is triggered by an + external source. Typically this is a sensor, + which makes it possible to synchronises the + flash strobe start to exposure start.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE</constant></entry> + <entry>button</entry> + </row> + <row> + <entry spanname="descr">Strobe flash. Valid when + V4L2_CID_FLASH_LED_MODE is set to + V4L2_FLASH_LED_MODE_FLASH and V4L2_CID_FLASH_STROBE_SOURCE + is set to V4L2_FLASH_STROBE_SOURCE_SOFTWARE. Setting this + control may not be possible in presence of some faults. + See V4L2_CID_FLASH_FAULT.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_STOP</constant></entry> + <entry>button</entry> + </row> + <row><entry spanname="descr">Stop flash strobe immediately.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_STATUS</constant></entry> + <entry>boolean</entry> + </row> + <row> + <entry spanname="descr">Strobe status: whether the flash + is strobing at the moment or not. This is a read-only + control.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_TIMEOUT</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Hardware timeout for flash. The + flash strobe is stopped after this period of time has + passed from the start of the strobe.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_INTENSITY</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Intensity of the flash strobe when + the flash LED is in flash mode + (V4L2_FLASH_LED_MODE_FLASH). The unit should be milliamps + (mA) if possible.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_TORCH_INTENSITY</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Intensity of the flash LED in + torch mode (V4L2_FLASH_LED_MODE_TORCH). The unit should be + milliamps (mA) if possible. Setting this control may not + be possible in presence of some faults. See + V4L2_CID_FLASH_FAULT.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_INDICATOR_INTENSITY</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Intensity of the indicator LED. + The indicator LED may be fully independent of the flash + LED. The unit should be microamps (uA) if possible.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_FAULT</constant></entry> + <entry>bitmask</entry> + </row> + <row> + <entry spanname="descr">Faults related to the flash. The + faults tell about specific problems in the flash chip + itself or the LEDs attached to it. Faults may prevent + further use of some of the flash controls. In particular, + V4L2_CID_FLASH_LED_MODE is set to V4L2_FLASH_LED_MODE_NONE + if the fault affects the flash LED. Exactly which faults + have such an effect is chip dependent. Reading the faults + resets the control and returns the chip to a usable state + if possible.</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_FLASH_FAULT_OVER_VOLTAGE</constant></entry> + <entry>Flash controller voltage to the flash LED + has exceeded the limit specific to the flash + controller.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_TIMEOUT</constant></entry> + <entry>The flash strobe was still on when + the timeout set by the user --- + V4L2_CID_FLASH_TIMEOUT control --- has expired. + Not all flash controllers may set this in all + such conditions.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_OVER_TEMPERATURE</constant></entry> + <entry>The flash controller has overheated.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_SHORT_CIRCUIT</constant></entry> + <entry>The short circuit protection of the flash + controller has been triggered.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_OVER_CURRENT</constant></entry> + <entry>Current in the LED power supply has exceeded the limit + specific to the flash controller.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_INDICATOR</constant></entry> + <entry>The flash controller has detected a short or open + circuit condition on the indicator LED.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_CHARGE</constant></entry> + <entry>boolean</entry> + </row> + <row><entry spanname="descr">Enable or disable charging of the xenon + flash capacitor.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_FLASH_READY</constant></entry> + <entry>boolean</entry> + </row> + <row> + <entry spanname="descr">Is the flash ready to strobe? + Xenon flashes require their capacitors charged before + strobing. LED flashes often require a cooldown period + after strobe during which another strobe will not be + possible. This is a read-only control.</entry> + </row> + <row><entry></entry></row> + </tbody> + </tgroup> + </table> + </section> </section> - - <table pgwide="1" frame="none" id="flash-control-id"> - <title>Flash Control IDs</title> - - <tgroup cols="4"> - <colspec colname="c1" colwidth="1*" /> - <colspec colname="c2" colwidth="6*" /> - <colspec colname="c3" colwidth="2*" /> - <colspec colname="c4" colwidth="6*" /> - <spanspec namest="c1" nameend="c2" spanname="id" /> - <spanspec namest="c2" nameend="c4" spanname="descr" /> - <thead> - <row> - <entry spanname="id" align="left">ID</entry> - <entry align="left">Type</entry> - </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry> - </row> - </thead> - <tbody valign="top"> - <row><entry></entry></row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_CLASS</constant></entry> - <entry>class</entry> - </row> - <row> - <entry spanname="descr">The FLASH class descriptor.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_LED_MODE</constant></entry> - <entry>menu</entry> - </row> - <row id="v4l2-flash-led-mode"> - <entry spanname="descr">Defines the mode of the flash LED, - the high-power white LED attached to the flash controller. - Setting this control may not be possible in presence of - some faults. See V4L2_CID_FLASH_FAULT.</entry> - </row> - <row> - <entrytbl spanname="descr" cols="2"> - <tbody valign="top"> - <row> - <entry><constant>V4L2_FLASH_LED_MODE_NONE</constant></entry> - <entry>Off.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_LED_MODE_FLASH</constant></entry> - <entry>Flash mode.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_LED_MODE_TORCH</constant></entry> - <entry>Torch mode. See V4L2_CID_FLASH_TORCH_INTENSITY.</entry> - </row> - </tbody> - </entrytbl> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_SOURCE</constant></entry> - <entry>menu</entry> - </row> - <row id="v4l2-flash-strobe-source"><entry - spanname="descr">Defines the source of the flash LED - strobe.</entry> - </row> - <row> - <entrytbl spanname="descr" cols="2"> - <tbody valign="top"> - <row> - <entry><constant>V4L2_FLASH_STROBE_SOURCE_SOFTWARE</constant></entry> - <entry>The flash strobe is triggered by using - the V4L2_CID_FLASH_STROBE control.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_STROBE_SOURCE_EXTERNAL</constant></entry> - <entry>The flash strobe is triggered by an - external source. Typically this is a sensor, - which makes it possible to synchronises the - flash strobe start to exposure start.</entry> - </row> - </tbody> - </entrytbl> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE</constant></entry> - <entry>button</entry> - </row> - <row> - <entry spanname="descr">Strobe flash. Valid when - V4L2_CID_FLASH_LED_MODE is set to - V4L2_FLASH_LED_MODE_FLASH and V4L2_CID_FLASH_STROBE_SOURCE - is set to V4L2_FLASH_STROBE_SOURCE_SOFTWARE. Setting this - control may not be possible in presence of some faults. - See V4L2_CID_FLASH_FAULT.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_STOP</constant></entry> - <entry>button</entry> - </row> - <row><entry spanname="descr">Stop flash strobe immediately.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_STATUS</constant></entry> - <entry>boolean</entry> - </row> - <row> - <entry spanname="descr">Strobe status: whether the flash - is strobing at the moment or not. This is a read-only - control.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_TIMEOUT</constant></entry> - <entry>integer</entry> - </row> - <row> - <entry spanname="descr">Hardware timeout for flash. The - flash strobe is stopped after this period of time has - passed from the start of the strobe.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_INTENSITY</constant></entry> - <entry>integer</entry> - </row> - <row> - <entry spanname="descr">Intensity of the flash strobe when - the flash LED is in flash mode - (V4L2_FLASH_LED_MODE_FLASH). The unit should be milliamps - (mA) if possible.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_TORCH_INTENSITY</constant></entry> - <entry>integer</entry> - </row> - <row> - <entry spanname="descr">Intensity of the flash LED in - torch mode (V4L2_FLASH_LED_MODE_TORCH). The unit should be - milliamps (mA) if possible. Setting this control may not - be possible in presence of some faults. See - V4L2_CID_FLASH_FAULT.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_INDICATOR_INTENSITY</constant></entry> - <entry>integer</entry> - </row> - <row> - <entry spanname="descr">Intensity of the indicator LED. - The indicator LED may be fully independent of the flash - LED. The unit should be microamps (uA) if possible.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_FAULT</constant></entry> - <entry>bitmask</entry> - </row> - <row> - <entry spanname="descr">Faults related to the flash. The - faults tell about specific problems in the flash chip - itself or the LEDs attached to it. Faults may prevent - further use of some of the flash controls. In particular, - V4L2_CID_FLASH_LED_MODE is set to V4L2_FLASH_LED_MODE_NONE - if the fault affects the flash LED. Exactly which faults - have such an effect is chip dependent. Reading the faults - resets the control and returns the chip to a usable state - if possible.</entry> - </row> - <row> - <entrytbl spanname="descr" cols="2"> - <tbody valign="top"> - <row> - <entry><constant>V4L2_FLASH_FAULT_OVER_VOLTAGE</constant></entry> - <entry>Flash controller voltage to the flash LED - has exceeded the limit specific to the flash - controller.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_FAULT_TIMEOUT</constant></entry> - <entry>The flash strobe was still on when - the timeout set by the user --- - V4L2_CID_FLASH_TIMEOUT control --- has expired. - Not all flash controllers may set this in all - such conditions.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_FAULT_OVER_TEMPERATURE</constant></entry> - <entry>The flash controller has overheated.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_FAULT_SHORT_CIRCUIT</constant></entry> - <entry>The short circuit protection of the flash - controller has been triggered.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_FAULT_OVER_CURRENT</constant></entry> - <entry>Current in the LED power supply has exceeded the limit - specific to the flash controller.</entry> - </row> - <row> - <entry><constant>V4L2_FLASH_FAULT_INDICATOR</constant></entry> - <entry>The flash controller has detected a short or open - circuit condition on the indicator LED.</entry> - </row> - </tbody> - </entrytbl> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_CHARGE</constant></entry> - <entry>boolean</entry> - </row> - <row><entry spanname="descr">Enable or disable charging of the xenon - flash capacitor.</entry> - </row> - <row> - <entry spanname="id"><constant>V4L2_CID_FLASH_READY</constant></entry> - <entry>boolean</entry> - </row> - <row> - <entry spanname="descr">Is the flash ready to strobe? - Xenon flashes require their capacitors charged before - strobing. LED flashes often require a cooldown period - after strobe during which another strobe will not be - possible. This is a read-only control.</entry> - </row> - <row><entry></entry></row> - </tbody> - </tgroup> - </table> </section> <section id="jpeg-controls"> @@ -4274,4 +4273,165 @@ interface and may change in the future.</para> </table> </section> + + <section id="dv-controls"> + <title>Digital Video Control Reference</title> + + <note> + <title>Experimental</title> + + <para>This is an <link + linkend="experimental">experimental</link> interface and may + change in the future.</para> + </note> + + <para> + The Digital Video control class is intended to control receivers + and transmitters for <ulink url="http://en.wikipedia.org/wiki/Vga">VGA</ulink>, + <ulink url="http://en.wikipedia.org/wiki/Digital_Visual_Interface">DVI</ulink> + (Digital Visual Interface), HDMI (<xref linkend="hdmi" />) and DisplayPort (<xref linkend="dp" />). + These controls are generally expected to be private to the receiver or transmitter + subdevice that implements them, so they are only exposed on the + <filename>/dev/v4l-subdev*</filename> device node. + </para> + + <para>Note that these devices can have multiple input or output pads which are + hooked up to e.g. HDMI connectors. Even though the subdevice will receive or + transmit video from/to only one of those pads, the other pads can still be + active when it comes to EDID (Extended Display Identification Data, + <xref linkend="vesaedid" />) and HDCP (High-bandwidth Digital Content + Protection System, <xref linkend="hdcp" />) processing, allowing the device + to do the fairly slow EDID/HDCP handling in advance. This allows for quick + switching between connectors.</para> + + <para>These pads appear in several of the controls in this section as + bitmasks, one bit for each pad. Bit 0 corresponds to pad 0, bit 1 to pad 1, + etc. The maximum value of the control is the set of valid pads.</para> + + <table pgwide="1" frame="none" id="dv-control-id"> + <title>Digital Video Control IDs</title> + + <tgroup cols="4"> + <colspec colname="c1" colwidth="1*" /> + <colspec colname="c2" colwidth="6*" /> + <colspec colname="c3" colwidth="2*" /> + <colspec colname="c4" colwidth="6*" /> + <spanspec namest="c1" nameend="c2" spanname="id" /> + <spanspec namest="c2" nameend="c4" spanname="descr" /> + <thead> + <row> + <entry spanname="id" align="left">ID</entry> + <entry align="left">Type</entry> + </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry> + </row> + </thead> + <tbody valign="top"> + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_CLASS</constant></entry> + <entry>class</entry> + </row> + <row> + <entry spanname="descr">The Digital Video class descriptor.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_TX_HOTPLUG</constant></entry> + <entry>bitmask</entry> + </row> + <row> + <entry spanname="descr">Many connectors have a hotplug pin which is high + if EDID information is available from the source. This control shows the + state of the hotplug pin as seen by the transmitter. + Each bit corresponds to an output pad on the transmitter. If an output pad + does not have an associated hotplug pin, then the bit for that pad will be 0. + This read-only control is applicable to DVI-D, HDMI and DisplayPort connectors. + </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_TX_RXSENSE</constant></entry> + <entry>bitmask</entry> + </row> + <row> + <entry spanname="descr">Rx Sense is the detection of pull-ups on the TMDS + clock lines. This normally means that the sink has left/entered standby (i.e. + the transmitter can sense that the receiver is ready to receive video). + Each bit corresponds to an output pad on the transmitter. If an output pad + does not have an associated Rx Sense, then the bit for that pad will be 0. + This read-only control is applicable to DVI-D and HDMI devices. + </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_TX_EDID_PRESENT</constant></entry> + <entry>bitmask</entry> + </row> + <row> + <entry spanname="descr">When the transmitter sees the hotplug signal from the + receiver it will attempt to read the EDID. If set, then the transmitter has read + at least the first block (= 128 bytes). + Each bit corresponds to an output pad on the transmitter. If an output pad + does not support EDIDs, then the bit for that pad will be 0. + This read-only control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors. + </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_TX_MODE</constant></entry> + <entry id="v4l2-dv-tx-mode">enum v4l2_dv_tx_mode</entry> + </row> + <row> + <entry spanname="descr">HDMI transmitters can transmit in DVI-D mode (just video) + or in HDMI mode (video + audio + auxiliary data). This control selects which mode + to use: V4L2_DV_TX_MODE_DVI_D or V4L2_DV_TX_MODE_HDMI. + This control is applicable to HDMI connectors. + </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_TX_RGB_RANGE</constant></entry> + <entry id="v4l2-dv-rgb-range">enum v4l2_dv_rgb_range</entry> + </row> + <row> + <entry spanname="descr">Select the quantization range for RGB output. V4L2_DV_RANGE_AUTO + follows the RGB quantization range specified in the standard for the video interface + (ie. <xref linkend="cea861" /> for HDMI). V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the standard + to be compatible with sinks that have not implemented the standard correctly + (unfortunately quite common for HDMI and DVI-D). Full range allows all possible values to be + used whereas limited range sets the range to (16 << (N-8)) - (235 << (N-8)) + where N is the number of bits per component. + This control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors. + </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_RX_POWER_PRESENT</constant></entry> + <entry>bitmask</entry> + </row> + <row> + <entry spanname="descr">Detects whether the receiver receives power from the source + (e.g. HDMI carries 5V on one of the pins). This is often used to power an eeprom + which contains EDID information, such that the source can read the EDID even if + the sink is in standby/power off. + Each bit corresponds to an input pad on the transmitter. If an input pad + cannot detect whether power is present, then the bit for that pad will be 0. + This read-only control is applicable to DVI-D, HDMI and DisplayPort connectors. + </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_DV_RX_RGB_RANGE</constant></entry> + <entry>enum v4l2_dv_rgb_range</entry> + </row> + <row> + <entry spanname="descr">Select the quantization range for RGB input. V4L2_DV_RANGE_AUTO + follows the RGB quantization range specified in the standard for the video interface + (ie. <xref linkend="cea861" /> for HDMI). V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the standard + to be compatible with sources that have not implemented the standard correctly + (unfortunately quite common for HDMI and DVI-D). Full range allows all possible values to be + used whereas limited range sets the range to (16 << (N-8)) - (235 << (N-8)) + where N is the number of bits per component. + This control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors. + </entry> + </row> + <row><entry></entry></row> + </tbody> + </tgroup> + </table> + + </section> </section> diff --git a/Documentation/DocBook/media/v4l/dev-osd.xml b/Documentation/DocBook/media/v4l/dev-osd.xml index 479d943..dd91d61 100644 --- a/Documentation/DocBook/media/v4l/dev-osd.xml +++ b/Documentation/DocBook/media/v4l/dev-osd.xml @@ -1,13 +1,6 @@ <title>Video Output Overlay Interface</title> <subtitle>Also known as On-Screen Display (OSD)</subtitle> - <note> - <title>Experimental</title> - - <para>This is an <link linkend="experimental">experimental</link> -interface and may change in the future.</para> - </note> - <para>Some video output devices can overlay a framebuffer image onto the outgoing video signal. Applications can set up such an overlay using this interface, which borrows structures and ioctls of the <link diff --git a/Documentation/DocBook/media/v4l/dev-rds.xml b/Documentation/DocBook/media/v4l/dev-rds.xml index 38883a4..be2f337 100644 --- a/Documentation/DocBook/media/v4l/dev-rds.xml +++ b/Documentation/DocBook/media/v4l/dev-rds.xml @@ -6,7 +6,7 @@ information, on an inaudible audio subcarrier of a radio program. This interface is aimed at devices capable of receiving and/or transmitting RDS information.</para> - <para>For more information see the core RDS standard <xref linkend="en50067" /> + <para>For more information see the core RDS standard <xref linkend="iec62106" /> and the RBDS standard <xref linkend="nrsc4" />.</para> <para>Note that the RBDS standard as is used in the USA is almost identical diff --git a/Documentation/DocBook/media/v4l/dev-subdev.xml b/Documentation/DocBook/media/v4l/dev-subdev.xml index a3d9dd0..d15aaf8 100644 --- a/Documentation/DocBook/media/v4l/dev-subdev.xml +++ b/Documentation/DocBook/media/v4l/dev-subdev.xml @@ -374,29 +374,29 @@ rectangle --- if it is supported by the hardware.</para> <orderedlist> - <listitem>Sink pad format. The user configures the sink pad + <listitem><para>Sink pad format. The user configures the sink pad format. This format defines the parameters of the image the - entity receives through the pad for further processing.</listitem> + entity receives through the pad for further processing.</para></listitem> - <listitem>Sink pad actual crop selection. The sink pad crop - defines the crop performed to the sink pad format.</listitem> + <listitem><para>Sink pad actual crop selection. The sink pad crop + defines the crop performed to the sink pad format.</para></listitem> - <listitem>Sink pad actual compose selection. The size of the + <listitem><para>Sink pad actual compose selection. The size of the sink pad compose rectangle defines the scaling ratio compared to the size of the sink pad crop rectangle. The location of the compose rectangle specifies the location of the actual sink compose rectangle in the sink compose bounds - rectangle.</listitem> + rectangle.</para></listitem> - <listitem>Source pad actual crop selection. Crop on the source + <listitem><para>Source pad actual crop selection. Crop on the source pad defines crop performed to the image in the sink compose - bounds rectangle.</listitem> + bounds rectangle.</para></listitem> - <listitem>Source pad format. The source pad format defines the + <listitem><para>Source pad format. The source pad format defines the output pixel format of the subdev, as well as the other parameters with the exception of the image width and height. Width and height are defined by the size of the source pad - actual crop selection.</listitem> + actual crop selection.</para></listitem> </orderedlist> <para>Accessing any of the above rectangles not supported by the diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml index 5bbf3ce..7e29a4e 100644 --- a/Documentation/DocBook/media/v4l/gen-errors.xml +++ b/Documentation/DocBook/media/v4l/gen-errors.xml @@ -7,6 +7,15 @@ <tbody valign="top"> <!-- Keep it ordered alphabetically --> <row> + <entry>EAGAIN (aka EWOULDBLOCK)</entry> + <entry>The ioctl can't be handled because the device is in state where + it can't perform it. This could happen for example in case where + device is sleeping and ioctl is performed to query statistics. + It is also returned when the ioctl would need to wait + for an event, but the device was opened in non-blocking mode. + </entry> + </row> + <row> <entry>EBADF</entry> <entry>The file descriptor is not a valid.</entry> </row> @@ -51,21 +60,11 @@ for periodic transfers (up to 80% of the USB bandwidth).</entry> </row> <row> - <entry>ENOSYS or EOPNOTSUPP</entry> - <entry>Function not available for this device (dvb API only. Will likely - be replaced anytime soon by ENOTTY).</entry> - </row> - <row> <entry>EPERM</entry> <entry>Permission denied. Can be returned if the device needs write permission, or some special capabilities is needed (e. g. root)</entry> </row> - <row> - <entry>EWOULDBLOCK</entry> - <entry>Operation would block. Used when the ioctl would need to wait - for an event, but the device was opened in non-blocking mode.</entry> - </row> </tbody> </tgroup> </table> diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml index 1885cc0..97f785a 100644 --- a/Documentation/DocBook/media/v4l/io.xml +++ b/Documentation/DocBook/media/v4l/io.xml @@ -613,8 +613,8 @@ field is independent of the <structfield>timestamp</structfield> and <entry>__u32</entry> <entry><structfield>sequence</structfield></entry> <entry></entry> - <entry>Set by the driver, counting the frames in the -sequence.</entry> + <entry>Set by the driver, counting the frames (not fields!) in +sequence. This field is set for both input and output devices.</entry> </row> <row> <entry spanname="hspan"><para>In <link @@ -685,18 +685,14 @@ memory, set by the application. See <xref linkend="userp" /> for details. <entry>__u32</entry> <entry><structfield>reserved2</structfield></entry> <entry></entry> - <entry>A place holder for future extensions and custom -(driver defined) buffer types -<constant>V4L2_BUF_TYPE_PRIVATE</constant> and higher. Applications + <entry>A place holder for future extensions. Applications should set this to 0.</entry> </row> <row> <entry>__u32</entry> <entry><structfield>reserved</structfield></entry> <entry></entry> - <entry>A place holder for future extensions and custom -(driver defined) buffer types -<constant>V4L2_BUF_TYPE_PRIVATE</constant> and higher. Applications + <entry>A place holder for future extensions. Applications should set this to 0.</entry> </row> </tbody> @@ -827,14 +823,7 @@ should set this to 0.</entry> <entry><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant></entry> <entry>8</entry> <entry>Buffer for video output overlay (OSD), see <xref - linkend="osd" />. Status: <link -linkend="experimental">Experimental</link>.</entry> - </row> - <row> - <entry><constant>V4L2_BUF_TYPE_PRIVATE</constant></entry> - <entry>0x80</entry> - <entry>This and higher values are reserved for custom -(driver defined) buffer types.</entry> + linkend="osd" />.</entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml index 8eace3e..2d3f0b1a 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml @@ -22,8 +22,7 @@ with 10 bits per colour compressed to 8 bits each, using DPCM compression. DPCM, differential pulse-code modulation, is lossy. Each colour component consumes 8 bits of memory. In other respects - this format is similar to <xref - linkend="pixfmt-srggb10">.</xref></para> + this format is similar to <xref linkend="pixfmt-srggb10" />.</para> </refsect1> </refentry> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml new file mode 100644 index 0000000..2330667 --- /dev/null +++ b/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml @@ -0,0 +1,154 @@ + <refentry id="V4L2-PIX-FMT-YVU420M"> + <refmeta> + <refentrytitle>V4L2_PIX_FMT_YVU420M ('YM21')</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> + </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 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>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 +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 +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 +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>Cr<subscript>00</subscript></entry> + <entry>Cr<subscript>01</subscript></entry> + </row> + <row> + <entry>start1 + 2:</entry> + <entry>Cr<subscript>10</subscript></entry> + <entry>Cr<subscript>11</subscript></entry> + </row> + <row><entry></entry></row> + <row> + <entry>start2 + 0:</entry> + <entry>Cb<subscript>00</subscript></entry> + <entry>Cb<subscript>01</subscript></entry> + </row> + <row> + <entry>start2 + 2:</entry> + <entry>Cb<subscript>10</subscript></entry> + <entry>Cb<subscript>11</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>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> + </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> + </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> + </row> + <row> + <entry>3</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry></entry><entry>Y</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 e58934c..1ddbfab 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -708,6 +708,7 @@ information.</para> &sub-y41p; &sub-yuv420; &sub-yuv420m; + &sub-yvu420m; &sub-yuv410; &sub-yuv422p; &sub-yuv411p; diff --git a/Documentation/DocBook/media/v4l/selection-api.xml b/Documentation/DocBook/media/v4l/selection-api.xml index e7ed507..4c238ce 100644 --- a/Documentation/DocBook/media/v4l/selection-api.xml +++ b/Documentation/DocBook/media/v4l/selection-api.xml @@ -40,6 +40,7 @@ cropping and composing rectangles have the same size.</para> <section> <title>Selection targets</title> + <para> <figure id="sel-targets-capture"> <title>Cropping and composing targets</title> <mediaobject> @@ -52,12 +53,12 @@ cropping and composing rectangles have the same size.</para> </textobject> </mediaobject> </figure> + </para> + <para>See <xref linkend="v4l2-selection-targets" /> for more + information.</para> </section> - See <xref linkend="v4l2-selection-targets" /> for more - information. - <section> <title>Configuration</title> @@ -216,18 +217,17 @@ composing and cropping operations by setting the appropriate targets. The V4L2 API lacks any support for composing to and cropping from an image inside a memory buffer. The application could configure a capture device to fill only a part of an image by abusing V4L2 API. Cropping a smaller image from a larger -one is achieved by setting the field <structfield> -&v4l2-pix-format;::bytesperline </structfield>. Introducing an image offsets -could be done by modifying field <structfield> &v4l2-buffer;::m:userptr -</structfield> before calling <constant> VIDIOC_QBUF </constant>. Those +one is achieved by setting the field +&v4l2-pix-format;<structfield>::bytesperline</structfield>. Introducing an image offsets +could be done by modifying field &v4l2-buffer;<structfield>::m_userptr</structfield> +before calling <constant> VIDIOC_QBUF </constant>. Those operations should be avoided because they are not portable (endianness), and do not work for macroblock and Bayer formats and mmap buffers. The selection API deals with configuration of buffer cropping/composing in a clear, intuitive and portable way. Next, with the selection API the concepts of the padded target -and constraints flags are introduced. Finally, <structname> &v4l2-crop; -</structname> and <structname> &v4l2-cropcap; </structname> have no reserved -fields. Therefore there is no way to extend their functionality. The new -<structname> &v4l2-selection; </structname> provides a lot of place for future +and constraints flags are introduced. Finally, &v4l2-crop; and &v4l2-cropcap; +have no reserved fields. Therefore there is no way to extend their functionality. +The new &v4l2-selection; provides a lot of place for future extensions. Driver developers are encouraged to implement only selection API. The former cropping API would be simulated using the new one. </para> diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index eee6908..10ccde9 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml @@ -145,9 +145,12 @@ applications. --> <authorinitials>hv</authorinitials> <revremark>Added VIDIOC_ENUM_FREQ_BANDS. </revremark> + </revision> + + <revision> <revnumber>3.5</revnumber> <date>2012-05-07</date> - <authorinitials>sa, sn</authorinitials> + <authorinitials>sa, sn, hv</authorinitials> <revremark>Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev selections API. Improved the description of V4L2_CID_COLORFX control, added V4L2_CID_COLORFX_CBCR control. @@ -158,11 +161,8 @@ applications. --> V4L2_CID_3A_LOCK, V4L2_CID_AUTO_FOCUS_START, V4L2_CID_AUTO_FOCUS_STOP, V4L2_CID_AUTO_FOCUS_STATUS and V4L2_CID_AUTO_FOCUS_RANGE. - </revremark> - <date>2012-05-01</date> - <authorinitials>hv</authorinitials> - <revremark>Added VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and - VIDIOC_DV_TIMINGS_CAP. + Added VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and + VIDIOC_DV_TIMINGS_CAP. </revremark> </revision> @@ -472,7 +472,7 @@ and discussions on the V4L mailing list.</revremark> </partinfo> <title>Video for Linux Two API Specification</title> - <subtitle>Revision 3.5</subtitle> + <subtitle>Revision 3.6</subtitle> <chapter id="common"> &sub-common; @@ -581,6 +581,7 @@ and discussions on the V4L mailing list.</revremark> &sub-subdev-enum-frame-size; &sub-subdev-enum-mbus-code; &sub-subdev-g-crop; + &sub-subdev-g-edid; &sub-subdev-g-fmt; &sub-subdev-g-frame-interval; &sub-subdev-g-selection; diff --git a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml index f1bac2c..bf7cc97 100644 --- a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml +++ b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml @@ -59,6 +59,9 @@ constant except when switching the video standard. Remember this switch can occur implicit when switching the video input or output.</para> + <para>This ioctl must be implemented for video capture or output devices that +support cropping and/or scaling and/or have non-square pixels, and for overlay devices.</para> + <table pgwide="1" frame="none" id="v4l2-cropcap"> <title>struct <structname>v4l2_cropcap</structname></title> <tgroup cols="3"> @@ -70,10 +73,10 @@ output.</para> <entry>Type of the data stream, set by the application. Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>, +<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>, <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>, -<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, and custom (driver -defined) types with code <constant>V4L2_BUF_TYPE_PRIVATE</constant> -and higher. See <xref linkend="v4l2-buf-type" />.</entry> +<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant> and +<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry> </row> <row> <entry>struct <link linkend="v4l2-rect-crop">v4l2_rect</link></entry> @@ -156,8 +159,7 @@ on 22 Oct 2002 subject "Re:[V4L][patches!] Re:v4l2/kernel-2.5" --> <term><errorcode>EINVAL</errorcode></term> <listitem> <para>The &v4l2-cropcap; <structfield>type</structfield> is -invalid. This is not permitted for video capture, output and overlay devices, -which must support <constant>VIDIOC_CROPCAP</constant>.</para> +invalid.</para> </listitem> </varlistentry> </variablelist> diff --git a/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml b/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml index 74b87f6..9215627 100644 --- a/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml @@ -49,13 +49,6 @@ <refsect1> <title>Description</title> - <note> - <title>Experimental</title> - - <para>This is an <link linkend="experimental">experimental</link> -interface and may change in the future.</para> - </note> - <para>These ioctls control an audio/video (usually MPEG-) decoder. <constant>VIDIOC_DECODER_CMD</constant> sends a command to the decoder, <constant>VIDIOC_TRY_DECODER_CMD</constant> can be used to diff --git a/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml b/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml index f431b3b..0619ca5 100644 --- a/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml @@ -49,13 +49,6 @@ <refsect1> <title>Description</title> - <note> - <title>Experimental</title> - - <para>This is an <link linkend="experimental">experimental</link> -interface and may change in the future.</para> - </note> - <para>These ioctls control an audio/video (usually MPEG-) encoder. <constant>VIDIOC_ENCODER_CMD</constant> sends a command to the encoder, <constant>VIDIOC_TRY_ENCODER_CMD</constant> can be used to diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml index 509f001..fced5fb 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 24c3bf4..b3e17c1 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-enum-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml index 81ebe48..f8dfeed 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml @@ -58,6 +58,9 @@ structure. Drivers fill the rest of the structure or return an incrementing by one until <errorcode>EINVAL</errorcode> is returned.</para> + <para>Note that after switching input or output the list of enumerated image +formats may be different.</para> + <table pgwide="1" frame="none" id="v4l2-fmtdesc"> <title>struct <structname>v4l2_fmtdesc</structname></title> <tgroup cols="3"> @@ -78,10 +81,8 @@ Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>, <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>, <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>, -<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>, -<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, and custom (driver -defined) types with code <constant>V4L2_BUF_TYPE_PRIVATE</constant> -and higher. See <xref linkend="v4l2-buf-type" />.</entry> +<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant> and +<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry> </row> <row> <entry>__u32</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml b/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml index f77a13f..a78454b 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml @@ -50,13 +50,6 @@ and pixel format and receives a frame width and height.</para> <refsect1> <title>Description</title> - <note> - <title>Experimental</title> - - <para>This is an <link linkend="experimental">experimental</link> -interface and may change in the future.</para> - </note> - <para>This ioctl allows applications to enumerate all frame sizes (&ie; width and height in pixels) that the device supports for the given pixel format.</para> diff --git a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml index 46d5a04..3c9a813 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml @@ -283,7 +283,7 @@ input/output interface to linux-media@vger.kernel.org on 19 Oct 2009. <entry>This input supports setting DV presets by using VIDIOC_S_DV_PRESET.</entry> </row> <row> - <entry><constant>V4L2_IN_CAP_CUSTOM_TIMINGS</constant></entry> + <entry><constant>V4L2_IN_CAP_DV_TIMINGS</constant></entry> <entry>0x00000002</entry> <entry>This input supports setting video timings by using VIDIOC_S_DV_TIMINGS.</entry> </row> diff --git a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml index 4280200..f4ab079 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml @@ -168,7 +168,7 @@ input/output interface to linux-media@vger.kernel.org on 19 Oct 2009. <entry>This output supports setting DV presets by using VIDIOC_S_DV_PRESET.</entry> </row> <row> - <entry><constant>V4L2_OUT_CAP_CUSTOM_TIMINGS</constant></entry> + <entry><constant>V4L2_OUT_CAP_DV_TIMINGS</constant></entry> <entry>0x00000002</entry> <entry>This output supports setting video timings by using VIDIOC_S_DV_TIMINGS.</entry> </row> diff --git a/Documentation/DocBook/media/v4l/vidioc-enumstd.xml b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml index 3a5fc54..8065099 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-crop.xml b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml index c4ff3b1..75c6a93 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-crop.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml @@ -104,10 +104,8 @@ changed and <constant>VIDIOC_S_CROP</constant> returns the <entry><structfield>type</structfield></entry> <entry>Type of the data stream, set by the application. Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>, -<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>, -<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, and custom (driver -defined) types with code <constant>V4L2_BUF_TYPE_PRIVATE</constant> -and higher. See <xref linkend="v4l2-buf-type" />.</entry> +<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> and +<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry> </row> <row> <entry>&v4l2-rect;</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml index 61be9fa..b9ea376 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 eda1a29..7236970 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_DV_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-enc-index.xml b/Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml index 2aef02c..be25029 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml @@ -48,13 +48,6 @@ <refsect1> <title>Description</title> - <note> - <title>Experimental</title> - - <para>This is an <link linkend="experimental">experimental</link> -interface and may change in the future.</para> - </note> - <para>The <constant>VIDIOC_G_ENC_INDEX</constant> ioctl provides meta data about a compressed video stream the same or another application currently reads from the driver, which is useful for diff --git a/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml index 52acff1..ee8f56e 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml @@ -81,7 +81,7 @@ the application calls the <constant>VIDIOC_S_FMT</constant> ioctl with a pointer to a <structname>v4l2_format</structname> structure the driver checks and adjusts the parameters against hardware abilities. Drivers -should not return an error code unless the input is ambiguous, this is +should not return an error code unless the <structfield>type</structfield> field is invalid, this is a mechanism to fathom device capabilities and to approach parameters acceptable for both the application and driver. On success the driver may program the hardware, allocate resources and generally prepare for @@ -107,6 +107,10 @@ disabling I/O or possibly time consuming hardware preparations. Although strongly recommended drivers are not required to implement this ioctl.</para> + <para>The format as returned by <constant>VIDIOC_TRY_FMT</constant> +must be identical to what <constant>VIDIOC_S_FMT</constant> returns for +the same input or output.</para> + <table pgwide="1" frame="none" id="v4l2-format"> <title>struct <structname>v4l2_format</structname></title> <tgroup cols="4"> @@ -170,9 +174,7 @@ capture and output devices.</entry> <entry></entry> <entry>__u8</entry> <entry><structfield>raw_data</structfield>[200]</entry> - <entry>Place holder for future extensions and custom -(driver defined) formats with <structfield>type</structfield> -<constant>V4L2_BUF_TYPE_PRIVATE</constant> and higher.</entry> + <entry>Place holder for future extensions.</entry> </row> </tbody> </tgroup> @@ -187,8 +189,7 @@ capture and output devices.</entry> <term><errorcode>EINVAL</errorcode></term> <listitem> <para>The &v4l2-format; <structfield>type</structfield> -field is invalid, the requested buffer type not supported, or the -format is not supported with this buffer type.</para> +field is invalid or the requested buffer type not supported.</para> </listitem> </varlistentry> </variablelist> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-parm.xml b/Documentation/DocBook/media/v4l/vidioc-g-parm.xml index f83d2cd..9058224 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-parm.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-parm.xml @@ -108,9 +108,7 @@ devices.</para> <entry></entry> <entry>__u8</entry> <entry><structfield>raw_data</structfield>[200]</entry> - <entry>A place holder for future extensions and custom -(driver defined) buffer types <constant>V4L2_BUF_TYPE_PRIVATE</constant> and -higher.</entry> + <entry>A place holder for future extensions.</entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-g-selection.xml index f76d8a6..b11ec75 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-selection.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-selection.xml @@ -152,12 +152,10 @@ satisfactory parameters have been negotiated. If constraints flags have to be violated at then ERANGE is returned. The error indicates that <emphasis> there exist no rectangle </emphasis> that satisfies the constraints.</para> - </refsect1> - <para>Selection targets and flags are documented in <xref linkend="v4l2-selections-common"/>.</para> - <section> + <para> <figure id="sel-const-adjust"> <title>Size adjustments with constraint flags.</title> <mediaobject> @@ -170,9 +168,9 @@ exist no rectangle </emphasis> that satisfies the constraints.</para> </textobject> </mediaobject> </figure> - </section> + </para> - <refsect1> + <para> <table pgwide="1" frame="none" id="v4l2-selection"> <title>struct <structname>v4l2_selection</structname></title> <tgroup cols="3"> @@ -208,6 +206,7 @@ exist no rectangle </emphasis> that satisfies the constraints.</para> </tbody> </tgroup> </table> + </para> </refsect1> <refsect1> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-std.xml b/Documentation/DocBook/media/v4l/vidioc-g-std.xml index 99ff1a0..4a89841 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-g-tuner.xml b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml index 7203951..6cc8201 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml @@ -125,7 +125,7 @@ the structure refers to a radio tuner the <constant>V4L2_TUNER_CAP_NORM</constant> flags can't be used.</para> <para>If multiple frequency bands are supported, then <structfield>capability</structfield> is the union of all -<structfield>capability></structfield> fields of each &v4l2-frequency-band;. +<structfield>capability</structfield> fields of each &v4l2-frequency-band;. </para></entry> </row> <row> @@ -354,6 +354,12 @@ radio tuners.</entry> <entry>The &VIDIOC-ENUM-FREQ-BANDS; ioctl can be used to enumerate the available frequency bands.</entry> </row> + <row> + <entry><constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant></entry> + <entry>0x0800</entry> + <entry>The range to search when using the hardware seek functionality + is programmable, see &VIDIOC-S-HW-FREQ-SEEK; for details.</entry> + </row> </tbody> </tgroup> </table> diff --git a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml index 77ff5be..6a821a6 100644 --- a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml +++ b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml @@ -155,6 +155,8 @@ or no buffers have been allocated yet, or the <structfield>userptr</structfield> or <structfield>length</structfield> are invalid.</para> </listitem> + </varlistentry> + <varlistentry> <term><errorcode>EIO</errorcode></term> <listitem> <para><constant>VIDIOC_DQBUF</constant> failed due to an diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml index 1bc8aeb..68b49d0 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 44935a0..e185f14 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-querycap.xml b/Documentation/DocBook/media/v4l/vidioc-querycap.xml index f33dd74..4c70215 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querycap.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querycap.xml @@ -90,11 +90,13 @@ ambiguities.</entry> <entry>__u8</entry> <entry><structfield>bus_info</structfield>[32]</entry> <entry>Location of the device in the system, a -NUL-terminated ASCII string. For example: "PCI Slot 4". This +NUL-terminated ASCII string. For example: "PCI:0000:05:06.0". This information is intended for users, to distinguish multiple -identical devices. If no such information is available the field may -simply count the devices controlled by the driver, or contain the -empty string (<structfield>bus_info</structfield>[0] = 0).<!-- XXX pci_dev->slot_name example --></entry> +identical devices. If no such information is available the field must +simply count the devices controlled by the driver ("platform:vivi-000"). +The bus_info must start with "PCI:" for PCI boards, "PCIe:" for PCI Express boards, +"usb-" for USB devices, "I2C:" for i2c devices, "ISA:" for ISA devices, +"parport" for parallel port devices and "platform:" for platform devices.</entry> </row> <row> <entry>__u32</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-querystd.xml b/Documentation/DocBook/media/v4l/vidioc-querystd.xml index 4b79c7c..fe80a18 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> diff --git a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml index d7c9505..2b50ef2 100644 --- a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml +++ b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml @@ -109,9 +109,8 @@ as the &v4l2-format; <structfield>type</structfield> field. See <xref <row> <entry>__u32</entry> <entry><structfield>reserved</structfield>[2]</entry> - <entry>A place holder for future extensions and custom -(driver defined) buffer types <constant>V4L2_BUF_TYPE_PRIVATE</constant> and -higher. This array should be zeroed by applications.</entry> + <entry>A place holder for future extensions. This array should +be zeroed by applications.</entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml index 3dd1bec..5b379e7 100644 --- a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml +++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml @@ -75,6 +75,9 @@ seek is started.</para> <para>This ioctl is supported if the <constant>V4L2_CAP_HW_FREQ_SEEK</constant> capability is set.</para> + <para>If this ioctl is called from a non-blocking filehandle, then &EAGAIN; is + returned and no seek takes place.</para> + <table pgwide="1" frame="none" id="v4l2-hw-freq-seek"> <title>struct <structname>v4l2_hw_freq_seek</structname></title> <tgroup cols="3"> @@ -158,6 +161,13 @@ fields is wrong.</para> </listitem> </varlistentry> <varlistentry> + <term><errorcode>EAGAIN</errorcode></term> + <listitem> + <para>Attempted to call <constant>VIDIOC_S_HW_FREQ_SEEK</constant> + with the filehandle in non-blocking mode.</para> + </listitem> + </varlistentry> + <varlistentry> <term><errorcode>ENODATA</errorcode></term> <listitem> <para>The hardware seek found no channels.</para> diff --git a/Documentation/DocBook/media/v4l/vidioc-streamon.xml b/Documentation/DocBook/media/v4l/vidioc-streamon.xml index 81cca45..716ea15 100644 --- a/Documentation/DocBook/media/v4l/vidioc-streamon.xml +++ b/Documentation/DocBook/media/v4l/vidioc-streamon.xml @@ -74,7 +74,12 @@ not transmitted yet. I/O returns to the same state as after calling stream type. This is the same as &v4l2-requestbuffers; <structfield>type</structfield>.</para> - <para>Note applications can be preempted for unknown periods right + <para>If <constant>VIDIOC_STREAMON</constant> is called when streaming +is already in progress, or if <constant>VIDIOC_STREAMOFF</constant> is called +when streaming is already stopped, then the ioctl does nothing and 0 is +returned.</para> + + <para>Note that applications can be preempted for unknown periods right before or after the <constant>VIDIOC_STREAMON</constant> or <constant>VIDIOC_STREAMOFF</constant> calls, there is no notion of starting or stopping "now". Buffer timestamps can be used to diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-edid.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-edid.xml new file mode 100644 index 0000000..bbd18f0 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-edid.xml @@ -0,0 +1,152 @@ +<refentry id="vidioc-subdev-g-edid"> + <refmeta> + <refentrytitle>ioctl VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_SUBDEV_G_EDID</refname> + <refname>VIDIOC_SUBDEV_S_EDID</refname> + <refpurpose>Get or set the EDID of a video receiver/transmitter</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_subdev_edid *<parameter>argp</parameter></paramdef> + </funcprototype> + </funcsynopsis> + <funcsynopsis> + <funcprototype> + <funcdef>int <function>ioctl</function></funcdef> + <paramdef>int <parameter>fd</parameter></paramdef> + <paramdef>int <parameter>request</parameter></paramdef> + <paramdef>const struct v4l2_subdev_edid *<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_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>argp</parameter></term> + <listitem> + <para></para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Description</title> + <para>These ioctls can be used to get or set an EDID associated with an input pad + from a receiver or an output pad of a transmitter subdevice.</para> + + <para>To get the EDID data the application has to fill in the <structfield>pad</structfield>, + <structfield>start_block</structfield>, <structfield>blocks</structfield> and <structfield>edid</structfield> + fields and call <constant>VIDIOC_SUBDEV_G_EDID</constant>. The current EDID from block + <structfield>start_block</structfield> and of size <structfield>blocks</structfield> + will be placed in the memory <structfield>edid</structfield> points to. The <structfield>edid</structfield> + pointer must point to memory at least <structfield>blocks</structfield> * 128 bytes + large (the size of one block is 128 bytes).</para> + + <para>If there are fewer blocks than specified, then the driver will set <structfield>blocks</structfield> + to the actual number of blocks. If there are no EDID blocks available at all, then the error code + ENODATA is set.</para> + + <para>If blocks have to be retrieved from the sink, then this call will block until they + have been read.</para> + + <para>To set the EDID blocks of a receiver the application has to fill in the <structfield>pad</structfield>, + <structfield>blocks</structfield> and <structfield>edid</structfield> fields and set + <structfield>start_block</structfield> to 0. It is not possible to set part of an EDID, + it is always all or nothing. Setting the EDID data is only valid for receivers as it makes + no sense for a transmitter.</para> + + <para>The driver assumes that the full EDID is passed in. If there are more EDID blocks than + the hardware can handle then the EDID is not written, but instead the error code E2BIG is set + and <structfield>blocks</structfield> is set to the maximum that the hardware supports. + If <structfield>start_block</structfield> is any + value other than 0 then the error code EINVAL is set.</para> + + <para>To disable an EDID you set <structfield>blocks</structfield> to 0. Depending on the + hardware this will drive the hotplug pin low and/or block the source from reading the EDID + data in some way. In any case, the end result is the same: the EDID is no longer available. + </para> + + <table pgwide="1" frame="none" id="v4l2-subdev-edid"> + <title>struct <structname>v4l2_subdev_edid</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>pad</structfield></entry> + <entry>Pad for which to get/set the EDID blocks.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>start_block</structfield></entry> + <entry>Read the EDID from starting with this block. Must be 0 when setting + the EDID.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>blocks</structfield></entry> + <entry>The number of blocks to get or set. Must be less or equal to 256 (the + maximum number of blocks as defined by the standard). When you set the EDID and + <structfield>blocks</structfield> is 0, then the EDID is disabled or erased.</entry> + </row> + <row> + <entry>__u8 *</entry> + <entry><structfield>edid</structfield></entry> + <entry>Pointer to memory that contains the EDID. The minimum size is + <structfield>blocks</structfield> * 128.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[5]</entry> + <entry>Reserved for future extensions. Applications and drivers must + set the array to zero.</entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>ENODATA</errorcode></term> + <listitem> + <para>The EDID data is not available.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>E2BIG</errorcode></term> + <listitem> + <para>The EDID data you provided is more than the hardware can handle.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml index f33cc81..1ba9e99 100644 --- a/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml +++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml @@ -69,23 +69,22 @@ more information on how each selection target affects the image processing pipeline inside the subdevice.</para> - <section> + <refsect2> <title>Types of selection targets</title> <para>There are two types of selection targets: actual and bounds. The actual targets are the targets which configure the hardware. The BOUNDS target will return a rectangle that contain all possible actual rectangles.</para> - </section> + </refsect2> - <section> + <refsect2> <title>Discovering supported features</title> <para>To discover which targets are supported, the user can perform <constant>VIDIOC_SUBDEV_G_SELECTION</constant> on them. Any unsupported target will return <constant>EINVAL</constant>.</para> - </section> <para>Selection targets and flags are documented in <xref linkend="v4l2-selections-common"/>.</para> @@ -132,6 +131,7 @@ </tbody> </tgroup> </table> + </refsect2> </refsect1> |
