We need to create a DVB graph, linking the several DVB devnodes.
Add such function. Please notice that this helper function
doesn't take into account devices with multiple DVB adapters
and frontends.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index 3aaffb319688..30acf97f4e4b 100644
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -380,6 +380,51 @@ void dvb_unregister_device(struct dvb_device *dvbdev)
}
EXPORT_SYMBOL(dvb_unregister_device);
+
+void dvb_create_media_graph(struct media_device *mdev)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER
+ struct media_entity *entity, *tuner = NULL, *fe = NULL;
+ struct media_entity *demux = NULL, *dvr = NULL, *ca = NULL;
+
+ if (!mdev)
+ return;
+
+ media_device_for_each_entity(entity, mdev) {
+ switch (entity->type) {
+ case MEDIA_ENT_T_V4L2_SUBDEV_TUNER:
+ tuner = entity;
+ break;
+ case MEDIA_ENT_T_DEVNODE_DVB_FE:
+ fe = entity;
+ break;
+ case MEDIA_ENT_T_DEVNODE_DVB_DEMUX:
+ demux = entity;
+ break;
+ case MEDIA_ENT_T_DEVNODE_DVB_DVR:
+ dvr = entity;
+ break;
+ case MEDIA_ENT_T_DEVNODE_DVB_CA:
+ ca = entity;
+ break;
+ }
+ }
+
+ if (tuner && fe)
+ media_entity_create_link(tuner, 0, fe, 0, 0);
+
+ if (fe && demux)
+ media_entity_create_link(fe, 1, demux, 0, 0);
+
+ if (demux && dvr)
+ media_entity_create_link(demux, 1, dvr, 0, 0);
+
+ if (demux && ca)
+ media_entity_create_link(demux, 1, ca, 0, 0);
+#endif
+}
+EXPORT_SYMBOL_GPL(dvb_create_media_graph);
+
static int dvbdev_check_free_adapter_num(int num)
{
struct list_head *entry;
diff --git a/drivers/media/dvb-core/dvbdev.h b/drivers/media/dvb-core/dvbdev.h
index c037c2ff9f5a..3ee767449fff 100644
--- a/drivers/media/dvb-core/dvbdev.h
+++ b/drivers/media/dvb-core/dvbdev.h
@@ -122,6 +122,7 @@ extern int dvb_register_device (struct dvb_adapter *adap,
int type);
extern void dvb_unregister_device (struct dvb_device *dvbdev);
+void dvb_create_media_graph(struct media_device *mdev);
extern int dvb_generic_open (struct inode *inode, struct file *file);
extern int dvb_generic_release (struct inode *inode, struct file *file);
--
2.1.0
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