[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>

diff --git a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml
index 69c178a4d20546d5c54f767df0c32158f7e222df..40e58a42eb26d55123ccf1153d702eb1b9a70953 100644 (file)
--- a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml
@@ -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>

diff --git a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
index 62a1aa200a36ccfd5dd59fe132de8ddfb57e2724..95d5371c17090af4ff0c9ba1e51aa3a0dbdc0d98 100644 (file)
--- a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
@@ -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>

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 407dfceb71f0c29fcc8cfd7d2a29cabc2e305ba1..f4db44d0d95a8c0b065bf99dccae34b63c70a6af 100644 (file)
--- a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
@@ -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 hardware seek found no channels.</para>
+       </listitem>
+      </varlistentry>
+      <varlistentry>
+       <term><errorcode>EBUSY</errorcode></term>
        <listitem>
-         <para>The ioctl timed-out. Try again.</para>
+         <para>Another hardware seek is already in progress.</para>
        </listitem>
       </varlistentry>
     </variablelist>