[media] uvcvideo: Mark first output terminal as default video node
The MEDIA_ENT_FL_DEFAULT identifies entities that are considered as
default for their group and type. For video nodes, it identifies the
node that application should use by default.
UVC devices don't report which output terminal should be considered as
the default, use the first one. Most devices have a single output
terminal anyway.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 22f14d2..5dbefa6 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1564,6 +1564,8 @@
chain->dev = dev;
v4l2_prio_init(&chain->prio);
+ term->flags |= UVC_ENTITY_FLAG_DEFAULT;
+
if (uvc_scan_chain(chain, term) < 0) {
kfree(chain);
continue;
diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index 29e2399..dc56a59 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -93,6 +93,8 @@
} else if (entity->vdev != NULL) {
ret = media_entity_init(&entity->vdev->entity,
entity->num_pads, entity->pads, 0);
+ if (entity->flags & UVC_ENTITY_FLAG_DEFAULT)
+ entity->vdev->entity.flags |= MEDIA_ENT_FL_DEFAULT;
} else
ret = 0;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 006ae27..af505fd 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -225,10 +225,14 @@
* always be accessed with the UVC_ENTITY_* macros and never directly.
*/
+#define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
+
struct uvc_entity {
struct list_head list; /* Entity as part of a UVC device. */
struct list_head chain; /* Entity as part of a video device
* chain. */
+ unsigned int flags;
+
__u8 id;
__u16 type;
char name[64];