media: au0828 disable tuner to demod link in au0828_media_device_register()

Disable tuner to demod link in au0828_media_device_register(). This step
should be done after dvb graph is created.

[mchehab@osg.samsung.com: Solve conflictst to apply it upstream]
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/usb/au0828/au0828-core.c

@@ -456,6 +456,7 @@ static int au0828_media_device_register(struct au0828_dev *dev,
 {
 #ifdef CONFIG_MEDIA_CONTROLLER
 	int ret;
+	struct media_entity *entity, *demod = NULL, *tuner = NULL;
 
 	if (!dev->media_dev)
 		return 0;
@@ -479,6 +480,31 @@ static int au0828_media_device_register(struct au0828_dev *dev,
 		*/
 		au0828_media_graph_notify(NULL, (void *) dev);
 	}
+
+	/*
+	 * Find tuner and demod to disable the link between
+	 * the two to avoid disable step when tuner is requested
+	 * by video or audio. Note that this step can't be done
+	 * until dvb graph is created during dvb register.
+	*/
+	media_device_for_each_entity(entity, dev->media_dev) {
+		if (entity->function == MEDIA_ENT_F_DTV_DEMOD)
+			demod = entity;
+		else if (entity->function == MEDIA_ENT_F_TUNER)
+			tuner = entity;
+	}
+	/* Disable link between tuner and demod */
+	if (tuner && demod) {
+		struct media_link *link;
+
+		list_for_each_entry(link, &demod->links, list) {
+			if (link->sink->entity == demod &&
+			    link->source->entity == tuner) {
+				media_entity_setup_link(link, 0);
+			}
+		}
+	}
+
 	/* register entity_notify callback */
 	dev->entity_notify.notify_data = (void *) dev;
 	dev->entity_notify.notify = (void *) au0828_media_graph_notify;

drivers/media/v4l2-core/v4l2-mc.c

@@ -57,9 +57,6 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 		case MEDIA_ENT_F_ATV_DECODER:
 			decoder = entity;
 			break;
-		case MEDIA_ENT_F_DTV_DEMOD:
-			dtv_demod = entity;
-			break;
 		case MEDIA_ENT_F_IO_V4L:
 			io_v4l = entity;
 			break;
@@ -194,21 +191,6 @@ int v4l2_mc_create_media_graph(struct media_device *mdev)
 		flags = 0;
 	}
 
-	/*
-	 * Disable tuner to demod link to avoid disable step
-	 * when tuner is requested by video or audio
-	 */
-	if (tuner && dtv_demod) {
-		struct media_link *link;
-
-		list_for_each_entry(link, &dtv_demod->links, list) {
-			if (link->sink->entity == dtv_demod &&
-			    link->source->entity == tuner) {
-				media_entity_setup_link(link, 0);
-			}
-		}
-	}
-
 	return 0;
 }
 EXPORT_SYMBOL_GPL(v4l2_mc_create_media_graph);