[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>
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@ -1117,6 +1117,16 @@ static int tuner_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
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return 0;
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}
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/**
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* tuner_g_frequency - Get the tuned frequency for the tuner
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* @sd: pointer to struct v4l2_subdev
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* @f: pointer to struct v4l2_frequency
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*
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* At return, the structure f will be filled with tuner frequency
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* if the tuner matches the f->type.
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* Note: f->type should be initialized before calling it.
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* This is done by either video_ioctl2 or by the bridge driver.
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*/
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static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
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{
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struct tuner *t = to_tuner(sd);
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@ -1139,6 +1149,16 @@ static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
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return 0;
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}
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/**
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* tuner_g_tuner - Fill in tuner information
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* @sd: pointer to struct v4l2_subdev
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* @vt: pointer to struct v4l2_tuner
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*
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* At return, the structure vt will be filled with tuner information
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* if the tuner matches vt->type.
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* Note: vt->type should be initialized before calling it.
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* This is done by either video_ioctl2 or by the bridge driver.
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*/
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static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
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{
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struct tuner *t = to_tuner(sd);
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@ -1179,6 +1199,15 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
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return 0;
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}
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/**
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* tuner_s_tuner - Set the tuner's audio mode
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* @sd: pointer to struct v4l2_subdev
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* @vt: pointer to struct v4l2_tuner
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*
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* Sets the audio mode if the tuner matches vt->type.
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* Note: vt->type should be initialized before calling it.
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* This is done by either video_ioctl2 or by the bridge driver.
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*/
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static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
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{
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struct tuner *t = to_tuner(sd);
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@ -175,6 +175,13 @@ struct v4l2_subdev_core_ops {
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/* s_radio: v4l device was opened in radio mode.
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g_frequency: freq->type must be filled in. Normally done by video_ioctl2
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or the bridge driver.
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g_tuner:
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s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the
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bridge driver.
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s_type_addr: sets tuner type and its I2C addr.
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s_config: sets tda9887 specific stuff, like port1, port2 and qss
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