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authorLinus Torvalds <torvalds@linux-foundation.org>2010-02-26 17:16:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-02-26 17:16:20 -0800
commit2b8c70b2174402ca3dec13310ce56597233392d7 (patch)
tree0aed464521a2a671cbb7b4302b55fe72abc95d3d /Documentation/DocBook/v4l/vidioc-querybuf.xml
parent29e1fa3565a7951cc415c634eb2b78dbdbee151d (diff)
parent3621263a4d9679726b7bc1e2546c1c03941a59b4 (diff)
downloadop-kernel-dev-2b8c70b2174402ca3dec13310ce56597233392d7.zip
op-kernel-dev-2b8c70b2174402ca3dec13310ce56597233392d7.tar.gz
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (362 commits) V4L-DVB: cx88-dvb: remove extra attribution for core V4L/DVB: v4l: soc_camera: fix bound checking of mbus_fmt[] index V4L/DVB: Add support for SMT7020 to cx88 V4L/DVB: radio-si470x: Use UTF-8 encoding on a comment V4L/DVB: MAINTAINERS: Telegent tlg2300 section fix V4L/DVB: gspca_stv06xx: Add support for camera button V4L/DVB: gspca_ov519: add support for the button on ov511 based cams V4L/DVB: gspca_ov519: Add support for the button on ov518 based cams V4L/DVB: gspca_ov519: add support for the button on ov519 based cams V4L/DVB: gspca_main: Fix a compile error when CONFIG_INPUT is not set V4L/DVB: gspca_main: some input error handling fixes V4L/DVB: gspca_main: Allow use of input device creation code for non int. inputs V4L/DVB: gspca_pac7302: much improved exposure control V4L/DVB: gspca_sonixb: Make sonixb driver handle pas106 and pas202 cameras V4L/DVB: gspca_sonixb: pas106: fixup bright ctrl and add gain and exposure ctrls V4L/DVB: Documentation: gspca.txt: update known mr97310a cams V4L/DVB: gspca_mr97310a: add support for the Sakar 1638x CyberPix V4L/DVB: gscpa_sonixb: limit ov7630 max framerate at 640x480 V4L/DVB: gspca_sonixb: pas202: fixup brightness ctrl and add gain and exposure ctrls V4L/DVB: gscpa_sonixb: Differentiate between sensors with a coarse and fine expo ctrl ...
Diffstat (limited to 'Documentation/DocBook/v4l/vidioc-querybuf.xml')
-rw-r--r--Documentation/DocBook/v4l/vidioc-querybuf.xml7
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/DocBook/v4l/vidioc-querybuf.xml b/Documentation/DocBook/v4l/vidioc-querybuf.xml
index d834993..e649805 100644
--- a/Documentation/DocBook/v4l/vidioc-querybuf.xml
+++ b/Documentation/DocBook/v4l/vidioc-querybuf.xml
@@ -54,12 +54,13 @@ buffer at any time after buffers have been allocated with the
&VIDIOC-REQBUFS; ioctl.</para>
<para>Applications set the <structfield>type</structfield> field
- of a &v4l2-buffer; to the same buffer type as previously
+ of a &v4l2-buffer; to the same buffer type as was previously used with
&v4l2-format; <structfield>type</structfield> and &v4l2-requestbuffers;
<structfield>type</structfield>, and the <structfield>index</structfield>
field. Valid index numbers range from zero
to the number of buffers allocated with &VIDIOC-REQBUFS;
(&v4l2-requestbuffers; <structfield>count</structfield>) minus one.
+The <structfield>reserved</structfield> field should to set to 0.
After calling <constant>VIDIOC_QUERYBUF</constant> with a pointer to
this structure drivers return an error code or fill the rest of
the structure.</para>
@@ -68,8 +69,8 @@ the structure.</para>
<constant>V4L2_BUF_FLAG_MAPPED</constant>,
<constant>V4L2_BUF_FLAG_QUEUED</constant> and
<constant>V4L2_BUF_FLAG_DONE</constant> flags will be valid. The
-<structfield>memory</structfield> field will be set to
-<constant>V4L2_MEMORY_MMAP</constant>, the <structfield>m.offset</structfield>
+<structfield>memory</structfield> field will be set to the current
+I/O method, the <structfield>m.offset</structfield>
contains the offset of the buffer from the start of the device memory,
the <structfield>length</structfield> field its size. The driver may
or may not set the remaining fields and flags, they are meaningless in
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