[media] au0828: frequency handling fixes

- define an initial frequency
- return an error if g_frequency is called for an invalid tuner index
- get the clamped frequency value after setting it: i.e. the tuner driver
  may clamp the given frequency to a valid frequency range and ctrl_freq
  should get that actual clamped frequency.
- remove obsolete tuner type checks (done by the core).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
index ba90ffb3d921..8562cca80b36 100644
--- a/drivers/media/usb/au0828/au0828-video.c
+++ b/drivers/media/usb/au0828/au0828-video.c
@@ -1542,7 +1542,8 @@ static int vidioc_g_frequency(struct file *file, void *priv,
         struct au0828_fh *fh = priv;
         struct au0828_dev *dev = fh->dev;
 
-        freq->type = V4L2_TUNER_ANALOG_TV;
+        if (freq->tuner != 0)
+                return -EINVAL;
         freq->frequency = dev->ctrl_freq;
         return 0;
 }
@@ -1552,13 +1553,10 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 {
         struct au0828_fh *fh = priv;
         struct au0828_dev *dev = fh->dev;
+        struct v4l2_frequency new_freq = *freq;
 
         if (freq->tuner != 0)
                 return -EINVAL;
-        if (freq->type != V4L2_TUNER_ANALOG_TV)
-                return -EINVAL;
-
-        dev->ctrl_freq = freq->frequency;
 
         if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
                 dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, 1);
@@ -1573,6 +1571,9 @@ static int vidioc_s_frequency(struct file *file, void *priv,
         }
 
         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
+        /* Get the actual set (and possibly clamped) frequency */
+        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
+        dev->ctrl_freq = new_freq.frequency;
 
         if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
                 dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, 0);
@@ -1976,6 +1977,7 @@ int au0828_analog_register(struct au0828_dev *dev,
         dev->frame_size = dev->field_size << 1;
         dev->bytesperline = dev->width << 1;
         dev->ctrl_ainput = 0;
+        dev->ctrl_freq = 960;
 
         /* allocate and fill v4l2 video struct */
         dev->vdev = video_device_alloc();