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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2011-06-13 14:35:56 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-07 20:04:23 +0200 |
| commit | 338e9e1ad541cbb2a3fa5839376ff6c138d40301 (patch) | |
| tree | 0657639257487bc4ac5499e51e8a4083ea4de896 | |
| parent | [media] v4l2-subdev.h: remove unused s_mode tuner op (diff) | |
| download | linux-338e9e1ad541cbb2a3fa5839376ff6c138d40301.tar.xz linux-338e9e1ad541cbb2a3fa5839376ff6c138d40301.zip | |
[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>
| -rw-r--r-- | drivers/media/video/tuner-core.c | 29 | ||||
| -rw-r--r-- | include/media/v4l2-subdev.h | 7 |
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c index 1843fc293322..6c007aa00236 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); diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 224502067c43..2884e3e69cb1 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -175,6 +175,13 @@ struct v4l2_subdev_core_ops { /* s_radio: v4l device was opened in radio mode. + g_frequency: freq->type must be filled in. Normally done by video_ioctl2 + or the bridge driver. + + g_tuner: + s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the + bridge driver. + s_type_addr: sets tuner type and its I2C addr. s_config: sets tda9887 specific stuff, like port1, port2 and qss |