To allow apps to limit a hw-freq-seek to a specific band, for further
info see the documentation this patch adds for these new fields.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
.../DocBook/media/v4l/vidioc-s-hw-freq-seek.xml | 44 ++++++++++++++++----
include/linux/videodev2.h | 5 ++-
2 files changed, 40 insertions(+), 9 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
index f4db44d..50dc9f8 100644
--- a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
@@ -52,11 +52,21 @@
<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>
+<structfield>wrap_around</structfield>, <structfield>spacing</structfield>,
+<structfield>rangelow</structfield> and <structfield>rangehigh</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>The <structfield>rangelow</structfield> and
+<structfield>rangehigh</structfield> fields can be set to a non-zero value to
+tell the driver to search a specific band. If the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant> flag set, these values
+must fall within one of the bands returned by &VIDIOC-ENUM-FREQ-BANDS;. If
+the <constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant> flag is not set,
+then these values must exactly match those of one of the bands returned by
+&VIDIOC-ENUM-FREQ-BANDS;.</para>
<para>If an error is returned, then the original frequency will
be restored.</para>
@@ -102,7 +112,23 @@ field and the &v4l2-tuner;
<structfield>index</structfield> field.</entry>
</row>
<row>
<entry>__u32</entry>
- <entry><structfield>reserved</structfield>[7]</entry>
+ <entry><structfield>rangelow</structfield></entry>
+ <entry>If non-zero, the lowest tunable frequency of the band to
+search in units of 62.5 kHz, or if the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_LOW</constant> flag set, in units of 62.5 Hz.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangehigh</structfield></entry>
+ <entry>If non-zero, the highest tunable frequency of the band to
+search in units of 62.5 kHz, or if the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_LOW</constant> flag set, in units of 62.5 Hz.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[5]</entry>
<entry>Reserved for future extensions. Applications
must set the array to zero.</entry>
</row>
@@ -119,8 +145,10 @@ field and the &v4l2-tuner;
<structfield>index</structfield> field.</entry>
<term><errorcode>EINVAL</errorcode></term>
<listitem>
<para>The <structfield>tuner</structfield> index is out of
-bounds, the wrap_around value is not supported or the value in the
<structfield>type</structfield> field is
-wrong.</para>
+bounds, the <structfield>wrap_around</structfield> value is not supported or
+one of the values in the <structfield>type</structfield>,
+<structfield>rangelow</structfield> or <structfield>rangehigh</structfield>
+fields is wrong.</para>
</listitem>
</varlistentry>
<varlistentry>
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 9fa822a..1c6aa63 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -2029,6 +2029,7 @@ struct v4l2_modulator {
#define V4L2_TUNER_CAP_RDS_BLOCK_IO 0x0100
#define V4L2_TUNER_CAP_RDS_CONTROLS 0x0200
#define V4L2_TUNER_CAP_FREQ_BANDS 0x0400
+#define V4L2_TUNER_CAP_HWSEEK_PROG_LIM 0x0800
/* Flags for the 'rxsubchans' field */
#define V4L2_TUNER_SUB_MONO 0x0001
@@ -2074,7 +2075,9 @@ struct v4l2_hw_freq_seek {
__u32 seek_upward;
__u32 wrap_around;
__u32 spacing;
- __u32 reserved[7];
+ __u32 rangelow;
+ __u32 rangehigh;
+ __u32 reserved[5];
};
/*
--
1.7.10.4
--
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