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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-20 12:37:45 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-20 12:37:45 -0400
commitfb091be08d1acf184e8801dfdcace6e0cb19b1fe (patch)
treecbd0c4200fd8628d592167589ca790e36fc4ae26 /Documentation/DocBook
parentbd7fc2f2d807fdb254f7efc542f8eec3f23e289e (diff)
parente8d0416796d43a950ec7b65629e53419b2e22453 (diff)
Merge branch 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (534 commits) V4L/DVB (13554a): v4l: Use the video_drvdata function in drivers V4L/DVB: vivi and mem2mem_testdev need slab.h to build V4L/DVB: tm6000: bugfix image position V4L/DVB: IR/imon: remove dead IMON_KEY_RELEASE_OFFSET V4L/DVB: tm6000: README - add vbi V4L/DVB: Fix unlock logic at medusa_video_init V4L/DVB: fix dvb frontend lockup V4L/DVB: s2255drv: remove dead code V4L/DVB: s2255drv: return if vdev not found V4L/DVB: ov511: cleanup: remove unneeded null check V4L/DVB: media/mem2mem: dereferencing free memory V4L/DVB: media/IR: Add missing include file to rc-map.c V4L/DVB: dvb/stv6110x: cleanup error handling V4L/DVB: ngene: Add lgdt3303 and mt2131 deps to Kconfig V4L/DVB: ngene: start separating out DVB functions into separate file V4L/DVB: ngene: split out card specific code into a separate file V4L/DVB: ngene: split out i2c code into a separate file V4L/DVB: ngene: add initial support for digital side of Avermedia m780 V4L/DVB: ngene: properly support boards where channel 0 isn't a TS input V4L-DVB: ngene: make sure that tuner headers are included ...
Diffstat (limited to 'Documentation/DocBook')
-rw-r--r--Documentation/DocBook/media-entities.tmpl11
-rw-r--r--Documentation/DocBook/v4l/compat.xml126
-rw-r--r--Documentation/DocBook/v4l/controls.xml36
-rw-r--r--Documentation/DocBook/v4l/dev-event.xml31
-rw-r--r--Documentation/DocBook/v4l/io.xml18
-rw-r--r--Documentation/DocBook/v4l/pixfmt.xml12
-rw-r--r--Documentation/DocBook/v4l/v4l2.xml3
-rw-r--r--Documentation/DocBook/v4l/videodev2.h.xml10
-rw-r--r--Documentation/DocBook/v4l/vidioc-dqevent.xml131
-rw-r--r--Documentation/DocBook/v4l/vidioc-enuminput.xml2
-rw-r--r--Documentation/DocBook/v4l/vidioc-qbuf.xml14
-rw-r--r--Documentation/DocBook/v4l/vidioc-queryctrl.xml2
-rw-r--r--Documentation/DocBook/v4l/vidioc-reqbufs.xml2
-rw-r--r--Documentation/DocBook/v4l/vidioc-subscribe-event.xml133
14 files changed, 463 insertions, 68 deletions
diff --git a/Documentation/DocBook/media-entities.tmpl b/Documentation/DocBook/media-entities.tmpl
index c725cb852c54..5d4d40f429a5 100644
--- a/Documentation/DocBook/media-entities.tmpl
+++ b/Documentation/DocBook/media-entities.tmpl
@@ -17,6 +17,7 @@
17<!ENTITY VIDIOC-DBG-G-REGISTER "<link linkend='vidioc-dbg-g-register'><constant>VIDIOC_DBG_G_REGISTER</constant></link>"> 17<!ENTITY VIDIOC-DBG-G-REGISTER "<link linkend='vidioc-dbg-g-register'><constant>VIDIOC_DBG_G_REGISTER</constant></link>">
18<!ENTITY VIDIOC-DBG-S-REGISTER "<link linkend='vidioc-dbg-g-register'><constant>VIDIOC_DBG_S_REGISTER</constant></link>"> 18<!ENTITY VIDIOC-DBG-S-REGISTER "<link linkend='vidioc-dbg-g-register'><constant>VIDIOC_DBG_S_REGISTER</constant></link>">
19<!ENTITY VIDIOC-DQBUF "<link linkend='vidioc-qbuf'><constant>VIDIOC_DQBUF</constant></link>"> 19<!ENTITY VIDIOC-DQBUF "<link linkend='vidioc-qbuf'><constant>VIDIOC_DQBUF</constant></link>">
20<!ENTITY VIDIOC-DQEVENT "<link linkend='vidioc-dqevent'><constant>VIDIOC_DQEVENT</constant></link>">
20<!ENTITY VIDIOC-ENCODER-CMD "<link linkend='vidioc-encoder-cmd'><constant>VIDIOC_ENCODER_CMD</constant></link>"> 21<!ENTITY VIDIOC-ENCODER-CMD "<link linkend='vidioc-encoder-cmd'><constant>VIDIOC_ENCODER_CMD</constant></link>">
21<!ENTITY VIDIOC-ENUMAUDIO "<link linkend='vidioc-enumaudio'><constant>VIDIOC_ENUMAUDIO</constant></link>"> 22<!ENTITY VIDIOC-ENUMAUDIO "<link linkend='vidioc-enumaudio'><constant>VIDIOC_ENUMAUDIO</constant></link>">
22<!ENTITY VIDIOC-ENUMAUDOUT "<link linkend='vidioc-enumaudioout'><constant>VIDIOC_ENUMAUDOUT</constant></link>"> 23<!ENTITY VIDIOC-ENUMAUDOUT "<link linkend='vidioc-enumaudioout'><constant>VIDIOC_ENUMAUDOUT</constant></link>">
@@ -60,6 +61,7 @@
60<!ENTITY VIDIOC-REQBUFS "<link linkend='vidioc-reqbufs'><constant>VIDIOC_REQBUFS</constant></link>"> 61<!ENTITY VIDIOC-REQBUFS "<link linkend='vidioc-reqbufs'><constant>VIDIOC_REQBUFS</constant></link>">
61<!ENTITY VIDIOC-STREAMOFF "<link linkend='vidioc-streamon'><constant>VIDIOC_STREAMOFF</constant></link>"> 62<!ENTITY VIDIOC-STREAMOFF "<link linkend='vidioc-streamon'><constant>VIDIOC_STREAMOFF</constant></link>">
62<!ENTITY VIDIOC-STREAMON "<link linkend='vidioc-streamon'><constant>VIDIOC_STREAMON</constant></link>"> 63<!ENTITY VIDIOC-STREAMON "<link linkend='vidioc-streamon'><constant>VIDIOC_STREAMON</constant></link>">
64<!ENTITY VIDIOC-SUBSCRIBE-EVENT "<link linkend='vidioc-subscribe-event'><constant>VIDIOC_SUBSCRIBE_EVENT</constant></link>">
63<!ENTITY VIDIOC-S-AUDIO "<link linkend='vidioc-g-audio'><constant>VIDIOC_S_AUDIO</constant></link>"> 65<!ENTITY VIDIOC-S-AUDIO "<link linkend='vidioc-g-audio'><constant>VIDIOC_S_AUDIO</constant></link>">
64<!ENTITY VIDIOC-S-AUDOUT "<link linkend='vidioc-g-audioout'><constant>VIDIOC_S_AUDOUT</constant></link>"> 66<!ENTITY VIDIOC-S-AUDOUT "<link linkend='vidioc-g-audioout'><constant>VIDIOC_S_AUDOUT</constant></link>">
65<!ENTITY VIDIOC-S-CROP "<link linkend='vidioc-g-crop'><constant>VIDIOC_S_CROP</constant></link>"> 67<!ENTITY VIDIOC-S-CROP "<link linkend='vidioc-g-crop'><constant>VIDIOC_S_CROP</constant></link>">
@@ -83,6 +85,7 @@
83<!ENTITY VIDIOC-TRY-ENCODER-CMD "<link linkend='vidioc-encoder-cmd'><constant>VIDIOC_TRY_ENCODER_CMD</constant></link>"> 85<!ENTITY VIDIOC-TRY-ENCODER-CMD "<link linkend='vidioc-encoder-cmd'><constant>VIDIOC_TRY_ENCODER_CMD</constant></link>">
84<!ENTITY VIDIOC-TRY-EXT-CTRLS "<link linkend='vidioc-g-ext-ctrls'><constant>VIDIOC_TRY_EXT_CTRLS</constant></link>"> 86<!ENTITY VIDIOC-TRY-EXT-CTRLS "<link linkend='vidioc-g-ext-ctrls'><constant>VIDIOC_TRY_EXT_CTRLS</constant></link>">
85<!ENTITY VIDIOC-TRY-FMT "<link linkend='vidioc-g-fmt'><constant>VIDIOC_TRY_FMT</constant></link>"> 87<!ENTITY VIDIOC-TRY-FMT "<link linkend='vidioc-g-fmt'><constant>VIDIOC_TRY_FMT</constant></link>">
88<!ENTITY VIDIOC-UNSUBSCRIBE-EVENT "<link linkend='vidioc-subscribe-event'><constant>VIDIOC_UNSUBSCRIBE_EVENT</constant></link>">
86 89
87<!-- Types --> 90<!-- Types -->
88<!ENTITY v4l2-std-id "<link linkend='v4l2-std-id'>v4l2_std_id</link>"> 91<!ENTITY v4l2-std-id "<link linkend='v4l2-std-id'>v4l2_std_id</link>">
@@ -141,6 +144,9 @@
141<!ENTITY v4l2-enc-idx "struct&nbsp;<link linkend='v4l2-enc-idx'>v4l2_enc_idx</link>"> 144<!ENTITY v4l2-enc-idx "struct&nbsp;<link linkend='v4l2-enc-idx'>v4l2_enc_idx</link>">
142<!ENTITY v4l2-enc-idx-entry "struct&nbsp;<link linkend='v4l2-enc-idx-entry'>v4l2_enc_idx_entry</link>"> 145<!ENTITY v4l2-enc-idx-entry "struct&nbsp;<link linkend='v4l2-enc-idx-entry'>v4l2_enc_idx_entry</link>">
143<!ENTITY v4l2-encoder-cmd "struct&nbsp;<link linkend='v4l2-encoder-cmd'>v4l2_encoder_cmd</link>"> 146<!ENTITY v4l2-encoder-cmd "struct&nbsp;<link linkend='v4l2-encoder-cmd'>v4l2_encoder_cmd</link>">
147<!ENTITY v4l2-event "struct&nbsp;<link linkend='v4l2-event'>v4l2_event</link>">
148<!ENTITY v4l2-event-subscription "struct&nbsp;<link linkend='v4l2-event-subscription'>v4l2_event_subscription</link>">
149<!ENTITY v4l2-event-vsync "struct&nbsp;<link linkend='v4l2-event-vsync'>v4l2_event_vsync</link>">
144<!ENTITY v4l2-ext-control "struct&nbsp;<link linkend='v4l2-ext-control'>v4l2_ext_control</link>"> 150<!ENTITY v4l2-ext-control "struct&nbsp;<link linkend='v4l2-ext-control'>v4l2_ext_control</link>">
145<!ENTITY v4l2-ext-controls "struct&nbsp;<link linkend='v4l2-ext-controls'>v4l2_ext_controls</link>"> 151<!ENTITY v4l2-ext-controls "struct&nbsp;<link linkend='v4l2-ext-controls'>v4l2_ext_controls</link>">
146<!ENTITY v4l2-fmtdesc "struct&nbsp;<link linkend='v4l2-fmtdesc'>v4l2_fmtdesc</link>"> 152<!ENTITY v4l2-fmtdesc "struct&nbsp;<link linkend='v4l2-fmtdesc'>v4l2_fmtdesc</link>">
@@ -200,6 +206,7 @@
200<!ENTITY sub-controls SYSTEM "v4l/controls.xml"> 206<!ENTITY sub-controls SYSTEM "v4l/controls.xml">
201<!ENTITY sub-dev-capture SYSTEM "v4l/dev-capture.xml"> 207<!ENTITY sub-dev-capture SYSTEM "v4l/dev-capture.xml">
202<!ENTITY sub-dev-codec SYSTEM "v4l/dev-codec.xml"> 208<!ENTITY sub-dev-codec SYSTEM "v4l/dev-codec.xml">
209<!ENTITY sub-dev-event SYSTEM "v4l/dev-event.xml">
203<!ENTITY sub-dev-effect SYSTEM "v4l/dev-effect.xml"> 210<!ENTITY sub-dev-effect SYSTEM "v4l/dev-effect.xml">
204<!ENTITY sub-dev-osd SYSTEM "v4l/dev-osd.xml"> 211<!ENTITY sub-dev-osd SYSTEM "v4l/dev-osd.xml">
205<!ENTITY sub-dev-output SYSTEM "v4l/dev-output.xml"> 212<!ENTITY sub-dev-output SYSTEM "v4l/dev-output.xml">
@@ -292,6 +299,8 @@
292<!ENTITY sub-v4l2grab-c SYSTEM "v4l/v4l2grab.c.xml"> 299<!ENTITY sub-v4l2grab-c SYSTEM "v4l/v4l2grab.c.xml">
293<!ENTITY sub-videodev2-h SYSTEM "v4l/videodev2.h.xml"> 300<!ENTITY sub-videodev2-h SYSTEM "v4l/videodev2.h.xml">
294<!ENTITY sub-v4l2 SYSTEM "v4l/v4l2.xml"> 301<!ENTITY sub-v4l2 SYSTEM "v4l/v4l2.xml">
302<!ENTITY sub-dqevent SYSTEM "v4l/vidioc-dqevent.xml">
303<!ENTITY sub-subscribe-event SYSTEM "v4l/vidioc-subscribe-event.xml">
295<!ENTITY sub-intro SYSTEM "dvb/intro.xml"> 304<!ENTITY sub-intro SYSTEM "dvb/intro.xml">
296<!ENTITY sub-frontend SYSTEM "dvb/frontend.xml"> 305<!ENTITY sub-frontend SYSTEM "dvb/frontend.xml">
297<!ENTITY sub-dvbproperty SYSTEM "dvb/dvbproperty.xml"> 306<!ENTITY sub-dvbproperty SYSTEM "dvb/dvbproperty.xml">
@@ -381,3 +390,5 @@
381<!ENTITY reqbufs SYSTEM "v4l/vidioc-reqbufs.xml"> 390<!ENTITY reqbufs SYSTEM "v4l/vidioc-reqbufs.xml">
382<!ENTITY s-hw-freq-seek SYSTEM "v4l/vidioc-s-hw-freq-seek.xml"> 391<!ENTITY s-hw-freq-seek SYSTEM "v4l/vidioc-s-hw-freq-seek.xml">
383<!ENTITY streamon SYSTEM "v4l/vidioc-streamon.xml"> 392<!ENTITY streamon SYSTEM "v4l/vidioc-streamon.xml">
393<!ENTITY dqevent SYSTEM "v4l/vidioc-dqevent.xml">
394<!ENTITY subscribe_event SYSTEM "v4l/vidioc-subscribe-event.xml">
diff --git a/Documentation/DocBook/v4l/compat.xml b/Documentation/DocBook/v4l/compat.xml
index b9dbdf9e6d29..b42b935913cd 100644
--- a/Documentation/DocBook/v4l/compat.xml
+++ b/Documentation/DocBook/v4l/compat.xml
@@ -2332,15 +2332,26 @@ more information.</para>
2332 </listitem> 2332 </listitem>
2333 </orderedlist> 2333 </orderedlist>
2334 </section> 2334 </section>
2335 </section> 2335 <section>
2336 <title>V4L2 in Linux 2.6.34</title>
2337 <orderedlist>
2338 <listitem>
2339 <para>Added
2340<constant>V4L2_CID_IRIS_ABSOLUTE</constant> and
2341<constant>V4L2_CID_IRIS_RELATIVE</constant> controls to the
2342 <link linkend="camera-controls">Camera controls class</link>.
2343 </para>
2344 </listitem>
2345 </orderedlist>
2346 </section>
2336 2347
2337 <section id="other"> 2348 <section id="other">
2338 <title>Relation of V4L2 to other Linux multimedia APIs</title> 2349 <title>Relation of V4L2 to other Linux multimedia APIs</title>
2339 2350
2340 <section id="xvideo"> 2351 <section id="xvideo">
2341 <title>X Video Extension</title> 2352 <title>X Video Extension</title>
2342 2353
2343 <para>The X Video Extension (abbreviated XVideo or just Xv) is 2354 <para>The X Video Extension (abbreviated XVideo or just Xv) is
2344an extension of the X Window system, implemented for example by the 2355an extension of the X Window system, implemented for example by the
2345XFree86 project. Its scope is similar to V4L2, an API to video capture 2356XFree86 project. Its scope is similar to V4L2, an API to video capture
2346and output devices for X clients. Xv allows applications to display 2357and output devices for X clients. Xv allows applications to display
@@ -2351,7 +2362,7 @@ capture or output still images in XPixmaps<footnote>
2351extension available across many operating systems and 2362extension available across many operating systems and
2352architectures.</para> 2363architectures.</para>
2353 2364
2354 <para>Because the driver is embedded into the X server Xv has a 2365 <para>Because the driver is embedded into the X server Xv has a
2355number of advantages over the V4L2 <link linkend="overlay">video 2366number of advantages over the V4L2 <link linkend="overlay">video
2356overlay interface</link>. The driver can easily determine the overlay 2367overlay interface</link>. The driver can easily determine the overlay
2357target, &ie; visible graphics memory or off-screen buffers for a 2368target, &ie; visible graphics memory or off-screen buffers for a
@@ -2360,16 +2371,16 @@ overlay, scaling or color-keying, or the clipping functions of the
2360video capture hardware, always in sync with drawing operations or 2371video capture hardware, always in sync with drawing operations or
2361windows moving or changing their stacking order.</para> 2372windows moving or changing their stacking order.</para>
2362 2373
2363 <para>To combine the advantages of Xv and V4L a special Xv 2374 <para>To combine the advantages of Xv and V4L a special Xv
2364driver exists in XFree86 and XOrg, just programming any overlay capable 2375driver exists in XFree86 and XOrg, just programming any overlay capable
2365Video4Linux device it finds. To enable it 2376Video4Linux device it finds. To enable it
2366<filename>/etc/X11/XF86Config</filename> must contain these lines:</para> 2377<filename>/etc/X11/XF86Config</filename> must contain these lines:</para>
2367 <para><screen> 2378 <para><screen>
2368Section "Module" 2379Section "Module"
2369 Load "v4l" 2380 Load "v4l"
2370EndSection</screen></para> 2381EndSection</screen></para>
2371 2382
2372 <para>As of XFree86 4.2 this driver still supports only V4L 2383 <para>As of XFree86 4.2 this driver still supports only V4L
2373ioctls, however it should work just fine with all V4L2 devices through 2384ioctls, however it should work just fine with all V4L2 devices through
2374the V4L2 backward-compatibility layer. Since V4L2 permits multiple 2385the V4L2 backward-compatibility layer. Since V4L2 permits multiple
2375opens it is possible (if supported by the V4L2 driver) to capture 2386opens it is possible (if supported by the V4L2 driver) to capture
@@ -2377,83 +2388,84 @@ video while an X client requested video overlay. Restrictions of
2377simultaneous capturing and overlay are discussed in <xref 2388simultaneous capturing and overlay are discussed in <xref
2378 linkend="overlay" /> apply.</para> 2389 linkend="overlay" /> apply.</para>
2379 2390
2380 <para>Only marginally related to V4L2, XFree86 extended Xv to 2391 <para>Only marginally related to V4L2, XFree86 extended Xv to
2381support hardware YUV to RGB conversion and scaling for faster video 2392support hardware YUV to RGB conversion and scaling for faster video
2382playback, and added an interface to MPEG-2 decoding hardware. This API 2393playback, and added an interface to MPEG-2 decoding hardware. This API
2383is useful to display images captured with V4L2 devices.</para> 2394is useful to display images captured with V4L2 devices.</para>
2384 </section> 2395 </section>
2385 2396
2386 <section> 2397 <section>
2387 <title>Digital Video</title> 2398 <title>Digital Video</title>
2388 2399
2389 <para>V4L2 does not support digital terrestrial, cable or 2400 <para>V4L2 does not support digital terrestrial, cable or
2390satellite broadcast. A separate project aiming at digital receivers 2401satellite broadcast. A separate project aiming at digital receivers
2391exists. You can find its homepage at <ulink 2402exists. You can find its homepage at <ulink
2392url="http://linuxtv.org">http://linuxtv.org</ulink>. The Linux DVB API 2403url="http://linuxtv.org">http://linuxtv.org</ulink>. The Linux DVB API
2393has no connection to the V4L2 API except that drivers for hybrid 2404has no connection to the V4L2 API except that drivers for hybrid
2394hardware may support both.</para> 2405hardware may support both.</para>
2395 </section> 2406 </section>
2396 2407
2397 <section> 2408 <section>
2398 <title>Audio Interfaces</title> 2409 <title>Audio Interfaces</title>
2399 2410
2400 <para>[to do - OSS/ALSA]</para> 2411 <para>[to do - OSS/ALSA]</para>
2412 </section>
2401 </section> 2413 </section>
2402 </section>
2403 2414
2404 <section id="experimental"> 2415 <section id="experimental">
2405 <title>Experimental API Elements</title> 2416 <title>Experimental API Elements</title>
2406 2417
2407 <para>The following V4L2 API elements are currently experimental 2418 <para>The following V4L2 API elements are currently experimental
2408and may change in the future.</para> 2419and may change in the future.</para>
2409 2420
2410 <itemizedlist> 2421 <itemizedlist>
2411 <listitem> 2422 <listitem>
2412 <para>Video Output Overlay (OSD) Interface, <xref 2423 <para>Video Output Overlay (OSD) Interface, <xref
2413 linkend="osd" />.</para> 2424 linkend="osd" />.</para>
2414 </listitem> 2425 </listitem>
2415 <listitem> 2426 <listitem>
2416 <para><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant>, 2427 <para><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant>,
2417 &v4l2-buf-type;, <xref linkend="v4l2-buf-type" />.</para> 2428 &v4l2-buf-type;, <xref linkend="v4l2-buf-type" />.</para>
2418 </listitem> 2429 </listitem>
2419 <listitem> 2430 <listitem>
2420 <para><constant>V4L2_CAP_VIDEO_OUTPUT_OVERLAY</constant>, 2431 <para><constant>V4L2_CAP_VIDEO_OUTPUT_OVERLAY</constant>,
2421&VIDIOC-QUERYCAP; ioctl, <xref linkend="device-capabilities" />.</para> 2432&VIDIOC-QUERYCAP; ioctl, <xref linkend="device-capabilities" />.</para>
2422 </listitem> 2433 </listitem>
2423 <listitem> 2434 <listitem>
2424 <para>&VIDIOC-ENUM-FRAMESIZES; and 2435 <para>&VIDIOC-ENUM-FRAMESIZES; and
2425&VIDIOC-ENUM-FRAMEINTERVALS; ioctls.</para> 2436&VIDIOC-ENUM-FRAMEINTERVALS; ioctls.</para>
2426 </listitem> 2437 </listitem>
2427 <listitem> 2438 <listitem>
2428 <para>&VIDIOC-G-ENC-INDEX; ioctl.</para> 2439 <para>&VIDIOC-G-ENC-INDEX; ioctl.</para>
2429 </listitem> 2440 </listitem>
2430 <listitem> 2441 <listitem>
2431 <para>&VIDIOC-ENCODER-CMD; and &VIDIOC-TRY-ENCODER-CMD; 2442 <para>&VIDIOC-ENCODER-CMD; and &VIDIOC-TRY-ENCODER-CMD;
2432ioctls.</para> 2443ioctls.</para>
2433 </listitem> 2444 </listitem>
2434 <listitem> 2445 <listitem>
2435 <para>&VIDIOC-DBG-G-REGISTER; and &VIDIOC-DBG-S-REGISTER; 2446 <para>&VIDIOC-DBG-G-REGISTER; and &VIDIOC-DBG-S-REGISTER;
2436ioctls.</para> 2447ioctls.</para>
2437 </listitem> 2448 </listitem>
2438 <listitem> 2449 <listitem>
2439 <para>&VIDIOC-DBG-G-CHIP-IDENT; ioctl.</para> 2450 <para>&VIDIOC-DBG-G-CHIP-IDENT; ioctl.</para>
2440 </listitem> 2451 </listitem>
2441 </itemizedlist> 2452 </itemizedlist>
2442 </section> 2453 </section>
2443 2454
2444 <section id="obsolete"> 2455 <section id="obsolete">
2445 <title>Obsolete API Elements</title> 2456 <title>Obsolete API Elements</title>
2446 2457
2447 <para>The following V4L2 API elements were superseded by new 2458 <para>The following V4L2 API elements were superseded by new
2448interfaces and should not be implemented in new drivers.</para> 2459interfaces and should not be implemented in new drivers.</para>
2449 2460
2450 <itemizedlist> 2461 <itemizedlist>
2451 <listitem> 2462 <listitem>
2452 <para><constant>VIDIOC_G_MPEGCOMP</constant> and 2463 <para><constant>VIDIOC_G_MPEGCOMP</constant> and
2453<constant>VIDIOC_S_MPEGCOMP</constant> ioctls. Use Extended Controls, 2464<constant>VIDIOC_S_MPEGCOMP</constant> ioctls. Use Extended Controls,
2454<xref linkend="extended-controls" />.</para> 2465<xref linkend="extended-controls" />.</para>
2455 </listitem> 2466 </listitem>
2456 </itemizedlist> 2467 </itemizedlist>
2468 </section>
2457 </section> 2469 </section>
2458 2470
2459 <!-- 2471 <!--
diff --git a/Documentation/DocBook/v4l/controls.xml b/Documentation/DocBook/v4l/controls.xml
index f46450610412..8408caaee276 100644
--- a/Documentation/DocBook/v4l/controls.xml
+++ b/Documentation/DocBook/v4l/controls.xml
@@ -267,6 +267,12 @@ minimum value disables backlight compensation.</entry>
267 <entry>Chroma automatic gain control.</entry> 267 <entry>Chroma automatic gain control.</entry>
268 </row> 268 </row>
269 <row> 269 <row>
270 <entry><constant>V4L2_CID_CHROMA_GAIN</constant></entry>
271 <entry>integer</entry>
272 <entry>Adjusts the Chroma gain control (for use when chroma AGC
273 is disabled).</entry>
274 </row>
275 <row>
270 <entry><constant>V4L2_CID_COLOR_KILLER</constant></entry> 276 <entry><constant>V4L2_CID_COLOR_KILLER</constant></entry>
271 <entry>boolean</entry> 277 <entry>boolean</entry>
272 <entry>Enable the color killer (&ie; force a black &amp; white image in case of a weak video signal).</entry> 278 <entry>Enable the color killer (&ie; force a black &amp; white image in case of a weak video signal).</entry>
@@ -277,8 +283,15 @@ minimum value disables backlight compensation.</entry>
277 <entry>Selects a color effect. Possible values for 283 <entry>Selects a color effect. Possible values for
278<constant>enum v4l2_colorfx</constant> are: 284<constant>enum v4l2_colorfx</constant> are:
279<constant>V4L2_COLORFX_NONE</constant> (0), 285<constant>V4L2_COLORFX_NONE</constant> (0),
280<constant>V4L2_COLORFX_BW</constant> (1) and 286<constant>V4L2_COLORFX_BW</constant> (1),
281<constant>V4L2_COLORFX_SEPIA</constant> (2).</entry> 287<constant>V4L2_COLORFX_SEPIA</constant> (2),
288<constant>V4L2_COLORFX_NEGATIVE</constant> (3),
289<constant>V4L2_COLORFX_EMBOSS</constant> (4),
290<constant>V4L2_COLORFX_SKETCH</constant> (5),
291<constant>V4L2_COLORFX_SKY_BLUE</constant> (6),
292<constant>V4L2_COLORFX_GRASS_GREEN</constant> (7),
293<constant>V4L2_COLORFX_SKIN_WHITEN</constant> (8) and
294<constant>V4L2_COLORFX_VIVID</constant> (9).</entry>
282 </row> 295 </row>
283 <row> 296 <row>
284 <entry><constant>V4L2_CID_ROTATE</constant></entry> 297 <entry><constant>V4L2_CID_ROTATE</constant></entry>
@@ -1825,6 +1838,25 @@ wide-angle direction. The zoom speed unit is driver-specific.</entry>
1825 <row><entry></entry></row> 1838 <row><entry></entry></row>
1826 1839
1827 <row> 1840 <row>
1841 <entry spanname="id"><constant>V4L2_CID_IRIS_ABSOLUTE</constant>&nbsp;</entry>
1842 <entry>integer</entry>
1843 </row><row><entry spanname="descr">This control sets the
1844camera's aperture to the specified value. The unit is undefined.
1845Larger values open the iris wider, smaller values close it.</entry>
1846 </row>
1847 <row><entry></entry></row>
1848
1849 <row>
1850 <entry spanname="id"><constant>V4L2_CID_IRIS_RELATIVE</constant>&nbsp;</entry>
1851 <entry>integer</entry>
1852 </row><row><entry spanname="descr">This control modifies the
1853camera's aperture by the specified amount. The unit is undefined.
1854Positive values open the iris one step further, negative values close
1855it one step further. This is a write-only control.</entry>
1856 </row>
1857 <row><entry></entry></row>
1858
1859 <row>
1828 <entry spanname="id"><constant>V4L2_CID_PRIVACY</constant>&nbsp;</entry> 1860 <entry spanname="id"><constant>V4L2_CID_PRIVACY</constant>&nbsp;</entry>
1829 <entry>boolean</entry> 1861 <entry>boolean</entry>
1830 </row><row><entry spanname="descr">Prevent video from being acquired 1862 </row><row><entry spanname="descr">Prevent video from being acquired
diff --git a/Documentation/DocBook/v4l/dev-event.xml b/Documentation/DocBook/v4l/dev-event.xml
new file mode 100644
index 000000000000..be5a98fb4fab
--- /dev/null
+++ b/Documentation/DocBook/v4l/dev-event.xml
@@ -0,0 +1,31 @@
1 <title>Event Interface</title>
2
3 <para>The V4L2 event interface provides means for user to get
4 immediately notified on certain conditions taking place on a device.
5 This might include start of frame or loss of signal events, for
6 example.
7 </para>
8
9 <para>To receive events, the events the user is interested in first must
10 be subscribed using the &VIDIOC-SUBSCRIBE-EVENT; ioctl. Once an event is
11 subscribed, the events of subscribed types are dequeueable using the
12 &VIDIOC-DQEVENT; ioctl. Events may be unsubscribed using
13 VIDIOC_UNSUBSCRIBE_EVENT ioctl. The special event type V4L2_EVENT_ALL may
14 be used to unsubscribe all the events the driver supports.</para>
15
16 <para>The event subscriptions and event queues are specific to file
17 handles. Subscribing an event on one file handle does not affect
18 other file handles.
19 </para>
20
21 <para>The information on dequeueable events is obtained by using select or
22 poll system calls on video devices. The V4L2 events use POLLPRI events on
23 poll system call and exceptions on select system call. </para>
24
25 <!--
26Local Variables:
27mode: sgml
28sgml-parent-document: "v4l2.sgml"
29indent-tabs-mode: nil
30End:
31 -->
diff --git a/Documentation/DocBook/v4l/io.xml b/Documentation/DocBook/v4l/io.xml
index e870330cbf77..d424886beda0 100644
--- a/Documentation/DocBook/v4l/io.xml
+++ b/Documentation/DocBook/v4l/io.xml
@@ -702,6 +702,16 @@ They can be both cleared however, then the buffer is in "dequeued"
702state, in the application domain to say so.</entry> 702state, in the application domain to say so.</entry>
703 </row> 703 </row>
704 <row> 704 <row>
705 <entry><constant>V4L2_BUF_FLAG_ERROR</constant></entry>
706 <entry>0x0040</entry>
707 <entry>When this flag is set, the buffer has been dequeued
708 successfully, although the data might have been corrupted.
709 This is recoverable, streaming may continue as normal and
710 the buffer may be reused normally.
711 Drivers set this flag when the <constant>VIDIOC_DQBUF</constant>
712 ioctl is called.</entry>
713 </row>
714 <row>
705 <entry><constant>V4L2_BUF_FLAG_KEYFRAME</constant></entry> 715 <entry><constant>V4L2_BUF_FLAG_KEYFRAME</constant></entry>
706 <entry>0x0008</entry> 716 <entry>0x0008</entry>
707 <entry>Drivers set or clear this flag when calling the 717 <entry>Drivers set or clear this flag when calling the
@@ -918,8 +928,8 @@ order</emphasis>.</para>
918 928
919 <para>When the driver provides or accepts images field by field 929 <para>When the driver provides or accepts images field by field
920rather than interleaved, it is also important applications understand 930rather than interleaved, it is also important applications understand
921how the fields combine to frames. We distinguish between top and 931how the fields combine to frames. We distinguish between top (aka odd) and
922bottom fields, the <emphasis>spatial order</emphasis>: The first line 932bottom (aka even) fields, the <emphasis>spatial order</emphasis>: The first line
923of the top field is the first line of an interlaced frame, the first 933of the top field is the first line of an interlaced frame, the first
924line of the bottom field is the second line of that frame.</para> 934line of the bottom field is the second line of that frame.</para>
925 935
@@ -972,12 +982,12 @@ between <constant>V4L2_FIELD_TOP</constant> and
972 <row> 982 <row>
973 <entry><constant>V4L2_FIELD_TOP</constant></entry> 983 <entry><constant>V4L2_FIELD_TOP</constant></entry>
974 <entry>2</entry> 984 <entry>2</entry>
975 <entry>Images consist of the top field only.</entry> 985 <entry>Images consist of the top (aka odd) field only.</entry>
976 </row> 986 </row>
977 <row> 987 <row>
978 <entry><constant>V4L2_FIELD_BOTTOM</constant></entry> 988 <entry><constant>V4L2_FIELD_BOTTOM</constant></entry>
979 <entry>3</entry> 989 <entry>3</entry>
980 <entry>Images consist of the bottom field only. 990 <entry>Images consist of the bottom (aka even) field only.
981Applications may wish to prevent a device from capturing interlaced 991Applications may wish to prevent a device from capturing interlaced
982images because they will have "comb" or "feathering" artefacts around 992images because they will have "comb" or "feathering" artefacts around
983moving objects.</entry> 993moving objects.</entry>
diff --git a/Documentation/DocBook/v4l/pixfmt.xml b/Documentation/DocBook/v4l/pixfmt.xml
index 885968d6a2fc..c4ad0a8e42dc 100644
--- a/Documentation/DocBook/v4l/pixfmt.xml
+++ b/Documentation/DocBook/v4l/pixfmt.xml
@@ -792,6 +792,18 @@ http://www.thedirks.org/winnov/</ulink></para></entry>
792 <entry>'YYUV'</entry> 792 <entry>'YYUV'</entry>
793 <entry>unknown</entry> 793 <entry>unknown</entry>
794 </row> 794 </row>
795 <row id="V4L2-PIX-FMT-Y4">
796 <entry><constant>V4L2_PIX_FMT_Y4</constant></entry>
797 <entry>'Y04 '</entry>
798 <entry>Old 4-bit greyscale format. Only the least significant 4 bits of each byte are used,
799the other bits are set to 0.</entry>
800 </row>
801 <row id="V4L2-PIX-FMT-Y6">
802 <entry><constant>V4L2_PIX_FMT_Y6</constant></entry>
803 <entry>'Y06 '</entry>
804 <entry>Old 6-bit greyscale format. Only the least significant 6 bits of each byte are used,
805the other bits are set to 0.</entry>
806 </row>
795 </tbody> 807 </tbody>
796 </tgroup> 808 </tgroup>
797 </table> 809 </table>
diff --git a/Documentation/DocBook/v4l/v4l2.xml b/Documentation/DocBook/v4l/v4l2.xml
index 060105af49e5..9737243377a3 100644
--- a/Documentation/DocBook/v4l/v4l2.xml
+++ b/Documentation/DocBook/v4l/v4l2.xml
@@ -401,6 +401,7 @@ and discussions on the V4L mailing list.</revremark>
401 <section id="ttx"> &sub-dev-teletext; </section> 401 <section id="ttx"> &sub-dev-teletext; </section>
402 <section id="radio"> &sub-dev-radio; </section> 402 <section id="radio"> &sub-dev-radio; </section>
403 <section id="rds"> &sub-dev-rds; </section> 403 <section id="rds"> &sub-dev-rds; </section>
404 <section id="event"> &sub-dev-event; </section>
404 </chapter> 405 </chapter>
405 406
406 <chapter id="driver"> 407 <chapter id="driver">
@@ -426,6 +427,7 @@ and discussions on the V4L mailing list.</revremark>
426 &sub-cropcap; 427 &sub-cropcap;
427 &sub-dbg-g-chip-ident; 428 &sub-dbg-g-chip-ident;
428 &sub-dbg-g-register; 429 &sub-dbg-g-register;
430 &sub-dqevent;
429 &sub-encoder-cmd; 431 &sub-encoder-cmd;
430 &sub-enumaudio; 432 &sub-enumaudio;
431 &sub-enumaudioout; 433 &sub-enumaudioout;
@@ -467,6 +469,7 @@ and discussions on the V4L mailing list.</revremark>
467 &sub-reqbufs; 469 &sub-reqbufs;
468 &sub-s-hw-freq-seek; 470 &sub-s-hw-freq-seek;
469 &sub-streamon; 471 &sub-streamon;
472 &sub-subscribe-event;
470 <!-- End of ioctls. --> 473 <!-- End of ioctls. -->
471 &sub-mmap; 474 &sub-mmap;
472 &sub-munmap; 475 &sub-munmap;
diff --git a/Documentation/DocBook/v4l/videodev2.h.xml b/Documentation/DocBook/v4l/videodev2.h.xml
index 068325940658..865b06d9e679 100644
--- a/Documentation/DocBook/v4l/videodev2.h.xml
+++ b/Documentation/DocBook/v4l/videodev2.h.xml
@@ -1018,6 +1018,13 @@ enum <link linkend="v4l2-colorfx">v4l2_colorfx</link> {
1018 V4L2_COLORFX_NONE = 0, 1018 V4L2_COLORFX_NONE = 0,
1019 V4L2_COLORFX_BW = 1, 1019 V4L2_COLORFX_BW = 1,
1020 V4L2_COLORFX_SEPIA = 2, 1020 V4L2_COLORFX_SEPIA = 2,
1021 V4L2_COLORFX_NEGATIVE = 3,
1022 V4L2_COLORFX_EMBOSS = 4,
1023 V4L2_COLORFX_SKETCH = 5,
1024 V4L2_COLORFX_SKY_BLUE = 6,
1025 V4L2_COLORFX_GRASS_GREEN = 7,
1026 V4L2_COLORFX_SKIN_WHITEN = 8,
1027 V4L2_COLORFX_VIVID = 9.
1021}; 1028};
1022#define V4L2_CID_AUTOBRIGHTNESS (V4L2_CID_BASE+32) 1029#define V4L2_CID_AUTOBRIGHTNESS (V4L2_CID_BASE+32)
1023#define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33) 1030#define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
@@ -1271,6 +1278,9 @@ enum <link linkend="v4l2-exposure-auto-type">v4l2_exposure_auto_type</link> {
1271 1278
1272#define V4L2_CID_PRIVACY (V4L2_CID_CAMERA_CLASS_BASE+16) 1279#define V4L2_CID_PRIVACY (V4L2_CID_CAMERA_CLASS_BASE+16)
1273 1280
1281#define V4L2_CID_IRIS_ABSOLUTE (V4L2_CID_CAMERA_CLASS_BASE+17)
1282#define V4L2_CID_IRIS_RELATIVE (V4L2_CID_CAMERA_CLASS_BASE+18)
1283
1274/* FM Modulator class control IDs */ 1284/* FM Modulator class control IDs */
1275#define V4L2_CID_FM_TX_CLASS_BASE (V4L2_CTRL_CLASS_FM_TX | 0x900) 1285#define V4L2_CID_FM_TX_CLASS_BASE (V4L2_CTRL_CLASS_FM_TX | 0x900)
1276#define V4L2_CID_FM_TX_CLASS (V4L2_CTRL_CLASS_FM_TX | 1) 1286#define V4L2_CID_FM_TX_CLASS (V4L2_CTRL_CLASS_FM_TX | 1)
diff --git a/Documentation/DocBook/v4l/vidioc-dqevent.xml b/Documentation/DocBook/v4l/vidioc-dqevent.xml
new file mode 100644
index 000000000000..4e0a7cc30812
--- /dev/null
+++ b/Documentation/DocBook/v4l/vidioc-dqevent.xml
@@ -0,0 +1,131 @@
1<refentry id="vidioc-dqevent">
2 <refmeta>
3 <refentrytitle>ioctl VIDIOC_DQEVENT</refentrytitle>
4 &manvol;
5 </refmeta>
6
7 <refnamediv>
8 <refname>VIDIOC_DQEVENT</refname>
9 <refpurpose>Dequeue event</refpurpose>
10 </refnamediv>
11
12 <refsynopsisdiv>
13 <funcsynopsis>
14 <funcprototype>
15 <funcdef>int <function>ioctl</function></funcdef>
16 <paramdef>int <parameter>fd</parameter></paramdef>
17 <paramdef>int <parameter>request</parameter></paramdef>
18 <paramdef>struct v4l2_event
19*<parameter>argp</parameter></paramdef>
20 </funcprototype>
21 </funcsynopsis>
22 </refsynopsisdiv>
23
24 <refsect1>
25 <title>Arguments</title>
26
27 <variablelist>
28 <varlistentry>
29 <term><parameter>fd</parameter></term>
30 <listitem>
31 <para>&fd;</para>
32 </listitem>
33 </varlistentry>
34 <varlistentry>
35 <term><parameter>request</parameter></term>
36 <listitem>
37 <para>VIDIOC_DQEVENT</para>
38 </listitem>
39 </varlistentry>
40 <varlistentry>
41 <term><parameter>argp</parameter></term>
42 <listitem>
43 <para></para>
44 </listitem>
45 </varlistentry>
46 </variablelist>
47 </refsect1>
48
49 <refsect1>
50 <title>Description</title>
51
52 <para>Dequeue an event from a video device. No input is required
53 for this ioctl. All the fields of the &v4l2-event; structure are
54 filled by the driver. The file handle will also receive exceptions
55 which the application may get by e.g. using the select system
56 call.</para>
57
58 <table frame="none" pgwide="1" id="v4l2-event">
59 <title>struct <structname>v4l2_event</structname></title>
60 <tgroup cols="4">
61 &cs-str;
62 <tbody valign="top">
63 <row>
64 <entry>__u32</entry>
65 <entry><structfield>type</structfield></entry>
66 <entry></entry>
67 <entry>Type of the event.</entry>
68 </row>
69 <row>
70 <entry>union</entry>
71 <entry><structfield>u</structfield></entry>
72 <entry></entry>
73 <entry></entry>
74 </row>
75 <row>
76 <entry></entry>
77 <entry>&v4l2-event-vsync;</entry>
78 <entry><structfield>vsync</structfield></entry>
79 <entry>Event data for event V4L2_EVENT_VSYNC.
80 </entry>
81 </row>
82 <row>
83 <entry></entry>
84 <entry>__u8</entry>
85 <entry><structfield>data</structfield>[64]</entry>
86 <entry>Event data. Defined by the event type. The union
87 should be used to define easily accessible type for
88 events.</entry>
89 </row>
90 <row>
91 <entry>__u32</entry>
92 <entry><structfield>pending</structfield></entry>
93 <entry></entry>
94 <entry>Number of pending events excluding this one.</entry>
95 </row>
96 <row>
97 <entry>__u32</entry>
98 <entry><structfield>sequence</structfield></entry>
99 <entry></entry>
100 <entry>Event sequence number. The sequence number is
101 incremented for every subscribed event that takes place.
102 If sequence numbers are not contiguous it means that
103 events have been lost.
104 </entry>
105 </row>
106 <row>
107 <entry>struct timespec</entry>
108 <entry><structfield>timestamp</structfield></entry>
109 <entry></entry>
110 <entry>Event timestamp.</entry>
111 </row>
112 <row>
113 <entry>__u32</entry>
114 <entry><structfield>reserved</structfield>[9]</entry>
115 <entry></entry>
116 <entry>Reserved for future extensions. Drivers must set
117 the array to zero.</entry>
118 </row>
119 </tbody>
120 </tgroup>
121 </table>
122
123 </refsect1>
124</refentry>
125<!--
126Local Variables:
127mode: sgml
128sgml-parent-document: "v4l2.sgml"
129indent-tabs-mode: nil
130End:
131-->
diff --git a/Documentation/DocBook/v4l/vidioc-enuminput.xml b/Documentation/DocBook/v4l/vidioc-enuminput.xml
index 71b868e2fb8f..476fe1d2bba0 100644
--- a/Documentation/DocBook/v4l/vidioc-enuminput.xml
+++ b/Documentation/DocBook/v4l/vidioc-enuminput.xml
@@ -283,7 +283,7 @@ input/output interface to linux-media@vger.kernel.org on 19 Oct 2009.
283 <entry>This input supports setting DV presets by using VIDIOC_S_DV_PRESET.</entry> 283 <entry>This input supports setting DV presets by using VIDIOC_S_DV_PRESET.</entry>
284 </row> 284 </row>
285 <row> 285 <row>
286 <entry><constant>V4L2_OUT_CAP_CUSTOM_TIMINGS</constant></entry> 286 <entry><constant>V4L2_IN_CAP_CUSTOM_TIMINGS</constant></entry>
287 <entry>0x00000002</entry> 287 <entry>0x00000002</entry>
288 <entry>This input supports setting custom video timings by using VIDIOC_S_DV_TIMINGS.</entry> 288 <entry>This input supports setting custom video timings by using VIDIOC_S_DV_TIMINGS.</entry>
289 </row> 289 </row>
diff --git a/Documentation/DocBook/v4l/vidioc-qbuf.xml b/Documentation/DocBook/v4l/vidioc-qbuf.xml
index b843bd7b3897..ab691ebf3b93 100644
--- a/Documentation/DocBook/v4l/vidioc-qbuf.xml
+++ b/Documentation/DocBook/v4l/vidioc-qbuf.xml
@@ -111,7 +111,11 @@ from the driver's outgoing queue. They just set the
111and <structfield>reserved</structfield> 111and <structfield>reserved</structfield>
112fields of a &v4l2-buffer; as above, when <constant>VIDIOC_DQBUF</constant> 112fields of a &v4l2-buffer; as above, when <constant>VIDIOC_DQBUF</constant>
113is called with a pointer to this structure the driver fills the 113is called with a pointer to this structure the driver fills the
114remaining fields or returns an error code.</para> 114remaining fields or returns an error code. The driver may also set
115<constant>V4L2_BUF_FLAG_ERROR</constant> in the <structfield>flags</structfield>
116field. It indicates a non-critical (recoverable) streaming error. In such case
117the application may continue as normal, but should be aware that data in the
118dequeued buffer might be corrupted.</para>
115 119
116 <para>By default <constant>VIDIOC_DQBUF</constant> blocks when no 120 <para>By default <constant>VIDIOC_DQBUF</constant> blocks when no
117buffer is in the outgoing queue. When the 121buffer is in the outgoing queue. When the
@@ -158,7 +162,13 @@ enqueue a user pointer buffer.</para>
158 <para><constant>VIDIOC_DQBUF</constant> failed due to an 162 <para><constant>VIDIOC_DQBUF</constant> failed due to an
159internal error. Can also indicate temporary problems like signal 163internal error. Can also indicate temporary problems like signal
160loss. Note the driver might dequeue an (empty) buffer despite 164loss. Note the driver might dequeue an (empty) buffer despite
161returning an error, or even stop capturing.</para> 165returning an error, or even stop capturing. Reusing such buffer may be unsafe
166though and its details (e.g. <structfield>index</structfield>) may not be
167returned either. It is recommended that drivers indicate recoverable errors
168by setting the <constant>V4L2_BUF_FLAG_ERROR</constant> and returning 0 instead.
169In that case the application should be able to safely reuse the buffer and
170continue streaming.
171 </para>
162 </listitem> 172 </listitem>
163 </varlistentry> 173 </varlistentry>
164 </variablelist> 174 </variablelist>
diff --git a/Documentation/DocBook/v4l/vidioc-queryctrl.xml b/Documentation/DocBook/v4l/vidioc-queryctrl.xml
index 4876ff1a1a04..8e0e055ac934 100644
--- a/Documentation/DocBook/v4l/vidioc-queryctrl.xml
+++ b/Documentation/DocBook/v4l/vidioc-queryctrl.xml
@@ -325,7 +325,7 @@ should be part of the control documentation.</entry>
325 <entry>n/a</entry> 325 <entry>n/a</entry>
326 <entry>This is not a control. When 326 <entry>This is not a control. When
327<constant>VIDIOC_QUERYCTRL</constant> is called with a control ID 327<constant>VIDIOC_QUERYCTRL</constant> is called with a control ID
328equal to a control class code (see <xref linkend="ctrl-class" />), the 328equal to a control class code (see <xref linkend="ctrl-class" />) + 1, the
329ioctl returns the name of the control class and this control type. 329ioctl returns the name of the control class and this control type.
330Older drivers which do not support this feature return an 330Older drivers which do not support this feature return an
331&EINVAL;.</entry> 331&EINVAL;.</entry>
diff --git a/Documentation/DocBook/v4l/vidioc-reqbufs.xml b/Documentation/DocBook/v4l/vidioc-reqbufs.xml
index 1c0816372074..69800ae23348 100644
--- a/Documentation/DocBook/v4l/vidioc-reqbufs.xml
+++ b/Documentation/DocBook/v4l/vidioc-reqbufs.xml
@@ -61,7 +61,7 @@ fields of the <structname>v4l2_requestbuffers</structname> structure.
61They set the <structfield>type</structfield> field to the respective 61They set the <structfield>type</structfield> field to the respective
62stream or buffer type, the <structfield>count</structfield> field to 62stream or buffer type, the <structfield>count</structfield> field to
63the desired number of buffers, <structfield>memory</structfield> 63the desired number of buffers, <structfield>memory</structfield>
64must be set to the requested I/O method and the reserved array 64must be set to the requested I/O method and the <structfield>reserved</structfield> array
65must be zeroed. When the ioctl 65must be zeroed. When the ioctl
66is called with a pointer to this structure the driver will attempt to allocate 66is called with a pointer to this structure the driver will attempt to allocate
67the requested number of buffers and it stores the actual number 67the requested number of buffers and it stores the actual number
diff --git a/Documentation/DocBook/v4l/vidioc-subscribe-event.xml b/Documentation/DocBook/v4l/vidioc-subscribe-event.xml
new file mode 100644
index 000000000000..8b501791aa68
--- /dev/null
+++ b/Documentation/DocBook/v4l/vidioc-subscribe-event.xml
@@ -0,0 +1,133 @@
1<refentry id="vidioc-subscribe-event">
2 <refmeta>
3 <refentrytitle>ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT</refentrytitle>
4 &manvol;
5 </refmeta>
6
7 <refnamediv>
8 <refname>VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT</refname>
9 <refpurpose>Subscribe or unsubscribe event</refpurpose>
10 </refnamediv>
11
12 <refsynopsisdiv>
13 <funcsynopsis>
14 <funcprototype>
15 <funcdef>int <function>ioctl</function></funcdef>
16 <paramdef>int <parameter>fd</parameter></paramdef>
17 <paramdef>int <parameter>request</parameter></paramdef>
18 <paramdef>struct v4l2_event_subscription
19*<parameter>argp</parameter></paramdef>
20 </funcprototype>
21 </funcsynopsis>
22 </refsynopsisdiv>
23
24 <refsect1>
25 <title>Arguments</title>
26
27 <variablelist>
28 <varlistentry>
29 <term><parameter>fd</parameter></term>
30 <listitem>
31 <para>&fd;</para>
32 </listitem>
33 </varlistentry>
34 <varlistentry>
35 <term><parameter>request</parameter></term>
36 <listitem>
37 <para>VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT</para>
38 </listitem>
39 </varlistentry>
40 <varlistentry>
41 <term><parameter>argp</parameter></term>
42 <listitem>
43 <para></para>
44 </listitem>
45 </varlistentry>
46 </variablelist>
47 </refsect1>
48
49 <refsect1>
50 <title>Description</title>
51
52 <para>Subscribe or unsubscribe V4L2 event. Subscribed events are
53 dequeued by using the &VIDIOC-DQEVENT; ioctl.</para>
54
55 <table frame="none" pgwide="1" id="v4l2-event-subscription">
56 <title>struct <structname>v4l2_event_subscription</structname></title>
57 <tgroup cols="3">
58 &cs-str;
59 <tbody valign="top">
60 <row>
61 <entry>__u32</entry>
62 <entry><structfield>type</structfield></entry>
63 <entry>Type of the event.</entry>
64 </row>
65 <row>
66 <entry>__u32</entry>
67 <entry><structfield>reserved</structfield>[7]</entry>
68 <entry>Reserved for future extensions. Drivers and applications
69 must set the array to zero.</entry>
70 </row>
71 </tbody>
72 </tgroup>
73 </table>
74
75 <table frame="none" pgwide="1" id="event-type">
76 <title>Event Types</title>
77 <tgroup cols="3">
78 &cs-def;
79 <tbody valign="top">
80 <row>
81 <entry><constant>V4L2_EVENT_ALL</constant></entry>
82 <entry>0</entry>
83 <entry>All events. V4L2_EVENT_ALL is valid only for
84 VIDIOC_UNSUBSCRIBE_EVENT for unsubscribing all events at once.
85 </entry>
86 </row>
87 <row>
88 <entry><constant>V4L2_EVENT_VSYNC</constant></entry>
89 <entry>1</entry>
90 <entry>This event is triggered on the vertical sync.
91 This event has &v4l2-event-vsync; associated with it.
92 </entry>
93 </row>
94 <row>
95 <entry><constant>V4L2_EVENT_EOS</constant></entry>
96 <entry>2</entry>
97 <entry>This event is triggered when the end of a stream is reached.
98 This is typically used with MPEG decoders to report to the application
99 when the last of the MPEG stream has been decoded.
100 </entry>
101 </row>
102 <row>
103 <entry><constant>V4L2_EVENT_PRIVATE_START</constant></entry>
104 <entry>0x08000000</entry>
105 <entry>Base event number for driver-private events.</entry>
106 </row>
107 </tbody>
108 </tgroup>
109 </table>
110
111 <table frame="none" pgwide="1" id="v4l2-event-vsync">
112 <title>struct <structname>v4l2_event_vsync</structname></title>
113 <tgroup cols="3">
114 &cs-str;
115 <tbody valign="top">
116 <row>
117 <entry>__u8</entry>
118 <entry><structfield>field</structfield></entry>
119 <entry>The upcoming field. See &v4l2-field;.</entry>
120 </row>
121 </tbody>
122 </tgroup>
123 </table>
124
125 </refsect1>
126</refentry>
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