[media] cx231xx: set standard tune to last known frequency when switching inputs

If switching to a tuner input, reset the standard and tune to the last known
frequency.  We need to do this in particular for this bridge since the tuner
gets powered down when captuing on the composite or s-video inputs.

Signed-off-by: Devin Heitmueller <dheitmueller@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c
index 31097e403406..0880edd3a49b 100644
--- a/drivers/media/video/cx231xx/cx231xx-video.c
+++ b/drivers/media/video/cx231xx/cx231xx-video.c
@@ -1246,6 +1246,14 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 
         video_mux(dev, i);
 
+        if (INPUT(i)->type == CX231XX_VMUX_TELEVISION ||
+            INPUT(i)->type == CX231XX_VMUX_CABLE) {
+                /* There's a tuner, so reset the standard and put it on the
+                   last known frequency (since it was probably powered down
+                   until now */
+                call_all(dev, core, s_std, dev->norm);
+        }
+
         mutex_unlock(&dev->lock);
         return 0;
 }