[PATCH v2 17/22] media: au0828 disable tuner to demod link

[Shuah Khan]

Change au0828_create_media_graph() to find and disable
tuner and demod link. This helps avoid an additional
disable step when tuner is requested by video or audio.

Signed-off-by: Shuah Khan <shua...@osg.samsung.com>
---
 drivers/media/usb/au0828/au0828-core.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/au0828/au0828-core.c 
b/drivers/media/usb/au0828/au0828-core.c
index 868babe..b02a122 100644
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -254,7 +254,7 @@ static int au0828_create_media_graph(struct au0828_dev *dev)
 #ifdef CONFIG_MEDIA_CONTROLLER
        struct media_device *mdev = dev->media_dev;
        struct media_entity *entity;
-       struct media_entity *tuner = NULL, *decoder = NULL;
+       struct media_entity *tuner = NULL, *decoder = NULL, *demod = NULL;
        int i, ret;
 
        if (!mdev)
@@ -268,6 +268,9 @@ static int au0828_create_media_graph(struct au0828_dev *dev)
                case MEDIA_ENT_F_ATV_DECODER:
                        decoder = entity;
                        break;
+               case MEDIA_ENT_F_DTV_DEMOD:
+                       demod = entity;
+                       break;
                }
        }
 
@@ -322,6 +325,21 @@ static int au0828_create_media_graph(struct au0828_dev 
*dev)
                        break;
                }
        }
+
+       /*
+        * Disable tuner to demod link to avoid disable step
+        * when tuner is requested by video or audio
+       */
+       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);
+                       }
+               }
+       }
 #endif
        return 0;
 }
-- 
2.5.0