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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-30 00:08:53 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-30 00:08:53 -0700 |
commit | 664a41b8a91bf78a01a751e15175e0008977685a (patch) | |
tree | d9dc15c83400ad2dfb430ff27ae3e7fdc9395856 /Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml | |
parent | 983236b5741e557451f3ed4ec5ebf1f62a5b2c15 (diff) | |
parent | ee2ce3a0b43d14d792d34cf88e7bc2091096744b (diff) | |
download | lwn-664a41b8a91bf78a01a751e15175e0008977685a.tar.gz lwn-664a41b8a91bf78a01a751e15175e0008977685a.zip |
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: (430 commits)
[media] ir-mce_kbd-decoder: include module.h for its facilities
[media] ov5642: include module.h for its facilities
[media] em28xx: Fix DVB-C maxsize for em2884
[media] tda18271c2dd: Fix saw filter configuration for DVB-C @6MHz
[media] v4l: mt9v032: Fix Bayer pattern
[media] V4L: mt9m111: rewrite set_pixfmt
[media] V4L: mt9m111: fix missing return value check mt9m111_reg_clear
[media] V4L: initial driver for ov5642 CMOS sensor
[media] V4L: sh_mobile_ceu_camera: fix Oops when USERPTR mapping fails
[media] V4L: soc-camera: remove soc-camera bus and devices on it
[media] V4L: soc-camera: un-export the soc-camera bus
[media] V4L: sh_mobile_csi2: switch away from using the soc-camera bus notifier
[media] V4L: add media bus configuration subdev operations
[media] V4L: soc-camera: group struct field initialisations together
[media] V4L: soc-camera: remove now unused soc-camera specific PM hooks
[media] V4L: pxa-camera: switch to using standard PM hooks
[media] NetUP Dual DVB-T/C CI RF: force card hardware revision by module param
[media] Don't OOPS if videobuf_dvb_get_frontend return NULL
[media] NetUP Dual DVB-T/C CI RF: load firmware according card revision
[media] omap3isp: Support configurable HS/VS polarities
...
Fix up conflicts:
- arch/arm/mach-omap2/board-rx51-peripherals.c:
cleanup regulator supply definitions in mach-omap2
vs
OMAP3: RX-51: define vdds_csib regulator supply
- drivers/staging/tm6000/tm6000-alsa.c (trivial)
Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml')
-rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml new file mode 100644 index 000000000000..c30dcc4232c0 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml @@ -0,0 +1,135 @@ +<refentry id="vidioc-s-hw-freq-seek"> + <refmeta> + <refentrytitle>ioctl VIDIOC_S_HW_FREQ_SEEK</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_S_HW_FREQ_SEEK</refname> + <refpurpose>Perform a hardware frequency seek</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_hw_freq_seek +*<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_S_HW_FREQ_SEEK</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>argp</parameter></term> + <listitem> + <para></para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Description</title> + + <para>Start a hardware frequency seek from the current frequency. +To do this applications initialize the <structfield>tuner</structfield>, +<structfield>type</structfield>, <structfield>seek_upward</structfield>, +<structfield>spacing</structfield> and +<structfield>wrap_around</structfield> fields, and zero out the +<structfield>reserved</structfield> array of a &v4l2-hw-freq-seek; and +call the <constant>VIDIOC_S_HW_FREQ_SEEK</constant> ioctl with a pointer +to this structure.</para> + + <para>This ioctl is supported if the <constant>V4L2_CAP_HW_FREQ_SEEK</constant> capability is set.</para> + + <table pgwide="1" frame="none" id="v4l2-hw-freq-seek"> + <title>struct <structname>v4l2_hw_freq_seek</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>tuner</structfield></entry> + <entry>The tuner index number. This is the +same value as in the &v4l2-input; <structfield>tuner</structfield> +field and the &v4l2-tuner; <structfield>index</structfield> field.</entry> + </row> + <row> + <entry>&v4l2-tuner-type;</entry> + <entry><structfield>type</structfield></entry> + <entry>The tuner type. This is the same value as in the +&v4l2-tuner; <structfield>type</structfield> field.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>seek_upward</structfield></entry> + <entry>If non-zero, seek upward from the current frequency, else seek downward.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>wrap_around</structfield></entry> + <entry>If non-zero, wrap around when at the end of the frequency range, else stop seeking.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>spacing</structfield></entry> + <entry>If non-zero, defines the hardware seek resolution in Hz. The driver selects the nearest value that is supported by the device. If spacing is zero a reasonable default value is used.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[7]</entry> + <entry>Reserved for future extensions. Drivers and + applications must set the array to zero.</entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>The <structfield>tuner</structfield> index is out of +bounds or the value in the <structfield>type</structfield> field is +wrong.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>EAGAIN</errorcode></term> + <listitem> + <para>The ioctl timed-out. Try again.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> + +<!-- +Local Variables: +mode: sgml +sgml-parent-document: "v4l2.sgml" +indent-tabs-mode: nil +End: +--> |