Add detection of source pad number for drivers aware of the media controller
API, so that rcar-vin can create device nodes to support modern drivers such
as adv7604.c (for HDMI on Lager) and the converted adv7180.c (for composite)
underneath.
Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
line with requirements for building the drivers associated with it.
Signed-off-by: William Towle <william.towle@xxxxxxxxxxxxxxx>
Signed-off-by: Rob Taylor <rob.taylor@xxxxxxxxxxxxxxx>
[uli: adapted to rcar-vin rewrite]
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
---
drivers/media/platform/rcar-vin/rcar-v4l2.c | 16 ++++++++++++++++
drivers/media/platform/rcar-vin/rcar-vin.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index 42dbd35..3788f8a 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -691,6 +691,9 @@ int rvin_v4l2_probe(struct rvin_dev *vin)
struct v4l2_mbus_framefmt *mf = &fmt.format;
struct video_device *vdev = &vin->vdev;
struct v4l2_subdev *sd = vin_to_source(vin);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ int pad_idx;
+#endif
int ret;
v4l2_set_subdev_hostdata(sd, vin);
@@ -737,6 +740,19 @@ int rvin_v4l2_probe(struct rvin_dev *vin)
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
V4L2_CAP_READWRITE;
+ vin->src_pad_idx = 0;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
+ if (sd->entity.pads[pad_idx].flags
+ == MEDIA_PAD_FL_SOURCE)
+ break;
+ if (pad_idx >= sd->entity.num_pads)
+ return -EINVAL;
+
+ vin->src_pad_idx = pad_idx;
+#endif
+ fmt.pad = vin->src_pad_idx;
+
/* Try to improve our guess of a reasonable window format */
ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
if (ret) {
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h
index 544a3b3..a6dd6db 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -87,6 +87,7 @@ struct rvin_graph_entity {
*
* @vdev: V4L2 video device associated with VIN
* @v4l2_dev: V4L2 device
+ * @src_pad_idx: source pad index for media controller drivers
* @ctrl_handler: V4L2 control handler
* @notifier: V4L2 asynchronous subdevs notifier
* @entity: entity in the DT for subdevice
@@ -117,6 +118,7 @@ struct rvin_dev {
struct video_device vdev;
struct v4l2_device v4l2_dev;
+ int src_pad_idx;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_async_notifier notifier;
struct rvin_graph_entity entity;
--
2.7.4
