V4L/DVB (8917): saa7134-empress: fix changing the capture standard for non-tuner inputs

When changing the standard the saa6752hs was not updated unless the input
was the TV tuner. The saa6752hs should be updated regardless of the input.

In addition the S_STD and G_STD ioctls for the mpeg video device didn't do
anything. This is now fixed: they behave just like S_STD and G_STD on the
video0 device.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 35 insertions, 7 deletions

diff --git a/drivers/media/video/saa7134/saa7134-video.c b/drivers/media/video/saa7134/saa7134-video.c
index 8fd31138f9ad..9aafd5844191 100644
--- a/drivers/media/video/saa7134/saa7134-video.c
+++ b/drivers/media/video/saa7134/saa7134-video.c
@@ -628,6 +628,9 @@ void saa7134_set_tvnorm_hw(struct saa7134_dev *dev)
 
         if (card_in(dev, dev->ctl_input).tv)
                 saa7134_i2c_call_clients(dev, VIDIOC_S_STD, &dev->tvnorm->id);
+        /* Set the correct norm for the saa6752hs. This function
+           does nothing if there is no saa6752hs. */
+        saa7134_i2c_call_saa6752(dev, VIDIOC_S_STD, &dev->tvnorm->id);
 }
 
 static void set_h_prescale(struct saa7134_dev *dev, int task, int prescale)
@@ -1796,18 +1799,25 @@ static int saa7134_querycap(struct file *file, void  *priv,
                 return 0;
 }
 
-static int saa7134_s_std(struct file *file, void *priv, v4l2_std_id *id)
+int saa7134_s_std_internal(struct saa7134_dev *dev, struct saa7134_fh *fh, v4l2_std_id *id)
 {
-        struct saa7134_fh *fh = priv;
-        struct saa7134_dev *dev = fh->dev;
         unsigned long flags;
         unsigned int i;
         v4l2_std_id fixup;
         int err;
 
-        err = v4l2_prio_check(&dev->prio, &fh->prio);
-        if (0 != err)
-                return err;
+        /* When called from the empress code fh == NULL.
+           That needs to be fixed somehow, but for now this is
+           good enough. */
+        if (fh) {
+                err = v4l2_prio_check(&dev->prio, &fh->prio);
+                if (0 != err)
+                        return err;
+        } else if (res_locked(dev, RESOURCE_OVERLAY)) {
+                /* Don't change the std from the mpeg device
+                   if overlay is active. */
+                return -EBUSY;
+        }
 
         for (i = 0; i < TVNORMS; i++)
                 if (*id == tvnorms[i].id)
@@ -1840,7 +1850,7 @@ static int saa7134_s_std(struct file *file, void *priv, v4l2_std_id *id)
         *id = tvnorms[i].id;
 
         mutex_lock(&dev->lock);
-        if (res_check(fh, RESOURCE_OVERLAY)) {
+        if (fh && res_check(fh, RESOURCE_OVERLAY)) {
                 spin_lock_irqsave(&dev->slock, flags);
                 stop_preview(dev, fh);
                 spin_unlock_irqrestore(&dev->slock, flags);
@@ -1857,6 +1867,23 @@ static int saa7134_s_std(struct file *file, void *priv, v4l2_std_id *id)
         mutex_unlock(&dev->lock);
         return 0;
 }
+EXPORT_SYMBOL_GPL(saa7134_s_std_internal);
+
+static int saa7134_s_std(struct file *file, void *priv, v4l2_std_id *id)
+{
+        struct saa7134_fh *fh = priv;
+
+        return saa7134_s_std_internal(fh->dev, fh, id);
+}
+
+static int saa7134_g_std(struct file *file, void *priv, v4l2_std_id *id)
+{
+        struct saa7134_fh *fh = priv;
+        struct saa7134_dev *dev = fh->dev;
+
+        *id = dev->tvnorm->id;
+        return 0;
+}
 
 static int saa7134_cropcap(struct file *file, void *priv,
                                         struct v4l2_cropcap *cap)
@@ -2397,6 +2424,7 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = {
         .vidioc_qbuf                    = saa7134_qbuf,
         .vidioc_dqbuf                   = saa7134_dqbuf,
         .vidioc_s_std                   = saa7134_s_std,
+        .vidioc_g_std                   = saa7134_g_std,
         .vidioc_enum_input              = saa7134_enum_input,
         .vidioc_g_input                 = saa7134_g_input,
         .vidioc_s_input                 = saa7134_s_input,