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[media] v4l2 spec: document the new v4l2_tuner capabilities 

Update the spec with the new capabilities and specify new error codes for
S_HW_FREQ_SEEK.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
hifive-unleashed-5.1
Hans Verkuil 2012-05-28 07:30:28 -03:00 committed by Mauro Carvalho Chehab
parent 6aeec0eacd
commit e4cca4edbc
3 changed files with 33 additions and 3 deletions
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6
Documentation/DocBook/media/v4l/vidioc-g-frequency.xml
View File

@ -135,6 +135,12 @@ bounds or the value in the <structfield>type</structfield> field is
wrong.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EBUSY</errorcode></term>
<listitem>
<para>A hardware seek is in progress.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>

12
Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
View File

@ -275,6 +275,18 @@ can or must be switched. (B/G PAL tuners for example are typically not
see the description of ioctl &VIDIOC-ENUMINPUT; for details. Only
<constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
</row>
<row>
<entry><constant>V4L2_TUNER_CAP_HWSEEK_BOUNDED</constant></entry>
<entry>0x0004</entry>
<entry>If set, then this tuner supports the hardware seek functionality
where the seek stops when it reaches the end of the frequency range.</entry>
</row>
<row>
<entry><constant>V4L2_TUNER_CAP_HWSEEK_WRAP</constant></entry>
<entry>0x0008</entry>
<entry>If set, then this tuner supports the hardware seek functionality
where the seek wraps around when it reaches the end of the frequency range.</entry>
</row>
<row>
<entry><constant>V4L2_TUNER_CAP_STEREO</constant></entry>
<entry>0x0010</entry>

18
Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
View File

@ -58,6 +58,9 @@ To do this applications initialize the <structfield>tuner</structfield>,
call the <constant>VIDIOC_S_HW_FREQ_SEEK</constant> ioctl with a pointer
to this structure.</para>
<para>If an error is returned, then the original frequency will
be restored.</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">
@ -87,7 +90,10 @@ field and the &v4l2-tuner; <structfield>index</structfield> field.</entry>
<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>
<entry>If non-zero, wrap around when at the end of the frequency range, else stop seeking.
The &v4l2-tuner; <structfield>capability</structfield> field will tell you what the
hardware supports.
</entry>
</row>
<row>
<entry>__u32</entry>
@ -118,9 +124,15 @@ wrong.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EAGAIN</errorcode></term>
<term><errorcode>ENODATA</errorcode></term>
<listitem>
<para>The ioctl timed-out. Try again.</para>
<para>The hardware seek found no channels.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EBUSY</errorcode></term>
<listitem>
<para>Another hardware seek is already in progress.</para>
</listitem>
</varlistentry>
</variablelist>