Add a new interface to be used by v4l-core to invoke enable_source
handler in the media_device to find tuner entity connected to the
decoder and check is it is available. enable_source handler will
activate the link if tuner is available.
Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-dev.c | 17 +++++++++++++++++
include/media/v4l2-dev.h | 3 +++
2 files changed, 20 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index 71a1b93..00fc71d 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -230,6 +230,23 @@ struct video_device *video_devdata(struct file *file)
}
EXPORT_SYMBOL(video_devdata);
+int v4l_enable_media_tuner(struct video_device *vdev)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER
+ struct media_device *mdev = vdev->decoder->parent;
+ int ret;
+
+ /* decoder */
+ if (!mdev || !mdev->enable_source)
+ return 0;
+ ret = mdev->enable_source(vdev->decoder);
+ if (ret)
+ return -EBUSY;
+ return 0;
+#endif /* CONFIG_MEDIA_CONTROLLER */
+ return 0;
+}
+EXPORT_SYMBOL_GPL(v4l_enable_media_tuner);
/* Priority handling */
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index acbcd2f..eff3852 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -86,6 +86,7 @@ struct video_device
{
#if defined(CONFIG_MEDIA_CONTROLLER)
struct media_entity entity;
+ struct media_entity *decoder;
#endif
/* device ops */
const struct v4l2_file_operations *fops;
@@ -178,6 +179,8 @@ struct video_device * __must_check video_device_alloc(void);
/* this release function frees the vdev pointer */
void video_device_release(struct video_device *vdev);
+int v4l_enable_media_tuner(struct video_device *vdev);
+
/* this release function does nothing, use when the video_device is a
static global struct. Note that having a static video_device is
a dubious construction at best. */
--
2.1.4
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