[PATCH v6 18/25] rcar-vin: prepare for media controller mode initialization

[Niklas Söderlund]

When running in media controller mode a media pad is needed, register
one. Also set the media bus format to CSI-2.

Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-core.c | 23 ++++++++++++++++++++++-
 drivers/media/platform/rcar-vin/rcar-vin.h  |  4 ++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-core.c 
b/drivers/media/platform/rcar-vin/rcar-core.c
index fbbb22924cf3a045..dd0525f2ba336bc2 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -45,6 +45,10 @@ static int rvin_find_pad(struct v4l2_subdev *sd, int 
direction)
        return -EINVAL;
 }
 
+/* 
-----------------------------------------------------------------------------
+ * Digital async notifier
+ */
+
 static bool rvin_mbus_supported(struct rvin_dev *vin)
 {
        struct v4l2_subdev *sd = vin->digital.subdev;
@@ -273,6 +277,20 @@ static int rvin_digital_graph_init(struct rvin_dev *vin)
        return 0;
 }
 
+/* 
-----------------------------------------------------------------------------
+ * Group async notifier
+ */
+
+static int rvin_group_init(struct rvin_dev *vin)
+{
+       /* All our sources are CSI-2 */
+       vin->mbus_cfg.type = V4L2_MBUS_CSI2;
+       vin->mbus_cfg.flags = 0;
+
+       vin->pad.flags = MEDIA_PAD_FL_SINK;
+       return media_entity_pads_init(&vin->vdev.entity, 1, &vin->pad);
+}
+
 /* 
-----------------------------------------------------------------------------
  * Platform Device Driver
  */
@@ -365,7 +383,10 @@ static int rcar_vin_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
-       ret = rvin_digital_graph_init(vin);
+       if (vin->info->use_mc)
+               ret = rvin_group_init(vin);
+       else
+               ret = rvin_digital_graph_init(vin);
        if (ret < 0)
                goto error;
 
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h 
b/drivers/media/platform/rcar-vin/rcar-vin.h
index 12daff804bb6f77f..9c47669669c0469c 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -103,6 +103,8 @@ struct rvin_info {
  * @notifier:          V4L2 asynchronous subdevs notifier
  * @digital:           entity in the DT for local digital subdevice
  *
+ * @pad:               pad for media controller
+ *
  * @lock:              protects @queue
  * @queue:             vb2 buffers queue
  *
@@ -132,6 +134,8 @@ struct rvin_dev {
        struct v4l2_async_notifier notifier;
        struct rvin_graph_entity digital;
 
+       struct media_pad pad;
+
        struct mutex lock;
        struct vb2_queue queue;
 
-- 
2.14.0