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authorHans Verkuil <hans.verkuil@cisco.com>2011-06-13 09:35:56 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-07-07 15:04:23 -0300
commit338e9e1ad541cbb2a3fa5839376ff6c138d40301 (patch)
tree0657639257487bc4ac5499e51e8a4083ea4de896 /drivers/media
parente206fc5e3de0e38a35b6f92941c913b6d8343fc6 (diff)
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[media] tuner-core/v4l2-subdev: document that the type field has to be filled in
The tuner ops g_frequency, g_tuner and s_tuner require that the tuner type field is filled in. Document this. The tuner-core doc is based on a patch from Mauro Carvalho Chehab <mchehab@redhat.com>. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/tuner-core.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index 1843fc2..6c007aa 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -1117,6 +1117,16 @@ static int tuner_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
return 0;
}
+/**
+ * tuner_g_frequency - Get the tuned frequency for the tuner
+ * @sd: pointer to struct v4l2_subdev
+ * @f: pointer to struct v4l2_frequency
+ *
+ * At return, the structure f will be filled with tuner frequency
+ * if the tuner matches the f->type.
+ * Note: f->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
struct tuner *t = to_tuner(sd);
@@ -1139,6 +1149,16 @@ static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
return 0;
}
+/**
+ * tuner_g_tuner - Fill in tuner information
+ * @sd: pointer to struct v4l2_subdev
+ * @vt: pointer to struct v4l2_tuner
+ *
+ * At return, the structure vt will be filled with tuner information
+ * if the tuner matches vt->type.
+ * Note: vt->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct tuner *t = to_tuner(sd);
@@ -1179,6 +1199,15 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
return 0;
}
+/**
+ * tuner_s_tuner - Set the tuner's audio mode
+ * @sd: pointer to struct v4l2_subdev
+ * @vt: pointer to struct v4l2_tuner
+ *
+ * Sets the audio mode if the tuner matches vt->type.
+ * Note: vt->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct tuner *t = to_tuner(sd);
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