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.to...@codethink.co.uk>
Signed-off-by: Rob Taylor <rob.tay...@codethink.co.uk>
[uli: adapted to rcar-vin rewrite]
Signed-off-by: Ulrich Hecht <ulrich.hecht+rene...@gmail.com>
---
drivers/media/platform/rcar-vin/rcar-dma.c | 15 +++++++++++++++
drivers/media/platform/rcar-vin/rcar-vin.h | 1 +
2 files changed, 16 insertions(+)
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c
b/drivers/media/platform/rcar-vin/rcar-dma.c
index 70dc928..6b23c968 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -891,6 +891,9 @@ int rvin_dma_on(struct rvin_dev *vin)
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
struct v4l2_mbus_framefmt *mf = &fmt.format;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+ int pad_idx;
+#endif
int ret;
sd = vin_to_sd(vin);
@@ -924,6 +927,18 @@ int rvin_dma_on(struct rvin_dev *vin)
/* TODO: ret = rvin_sensor_setup(vin, pix, ...); */
+ 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)
+ goto remove_device;
+
+ vin->src_pad_idx = pad_idx;
+#endif
+
vin->format.field = V4L2_FIELD_ANY;
video_set_drvdata(&vin->vdev, vin);
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h
b/drivers/media/platform/rcar-vin/rcar-vin.h
index 99141d7..f127f5d 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -106,6 +106,7 @@ struct rvin_dev {
enum chip_id chip;
struct v4l2_device v4l2_dev;
+ int src_pad_idx; /* For media-controller drivers */
struct v4l2_ctrl_handler ctrl_handler;
struct video_device vdev;
--
2.6.4
