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authorMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-01-03 16:52:34 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-02-13 21:10:15 -0200
commit4155109aa88ccf478b1d59a63df1969a5f519800 (patch)
treed714be9f954e80f63dbd0cf752cb13aa99a148df /drivers/media/dvb-core/dvbdev.c
parent3bde1b78408b7b1136cd64722b6cd8b2eb70b217 (diff)
[media] dvbdev: add a function to create DVB media graph
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. For devices with multiple adapters, they should either create two different media controller instances or to improve this function to take the adapter ID into account. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/dvb-core/dvbdev.c')
-rw-r--r--drivers/media/dvb-core/dvbdev.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index c5de02455b17..a991819ed1e1 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_DVB
+ 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;

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