[media] radio-miropcm20: fix signal and stereo indication

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

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/media/radio/radio-miropcm20.c b/drivers/media/radio/radio-miropcm20.c
index eb6cd86337a8..3d0ff4404d12 100644
--- a/drivers/media/radio/radio-miropcm20.c
+++ b/drivers/media/radio/radio-miropcm20.c
@@ -82,6 +82,7 @@ static int vidioc_g_tuner(struct file *file, void *priv,
                                 struct v4l2_tuner *v)
 {
         struct pcm20 *dev = video_drvdata(file);
+        int res;
 
         if (v->index)
                 return -EINVAL;
@@ -89,8 +90,13 @@ static int vidioc_g_tuner(struct file *file, void *priv,
         v->type = V4L2_TUNER_RADIO;
         v->rangelow = 87*16000;
         v->rangehigh = 108*16000;
-        v->signal = 0xffff;
-        v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+        res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTATION, -1, -1);
+        v->signal = (res & 0x80) ? 0 : 0xffff;
+        /* Note: stereo detection does not work if the audio is muted,
+           it will default to mono in that case. */
+        res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTEREO, -1, -1);
+        v->rxsubchans = (res & 0x40) ? V4L2_TUNER_SUB_MONO :
+                                        V4L2_TUNER_SUB_STEREO;
         v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
         v->audmode = dev->audmode;
         return 0;