media: staging/imx: Improve pipeline searching

Export find_pipeline_pad(), renaming to imx_media_pipeline_pad(), and
extend its functionality to allow searching for video devices in the
enabled pipeline in addition to sub-devices.

As part of this:

- Rename imx_media_find_mipi_csi2_channel() to
  imx_media_pipeline_csi2_channel().

- Remove imx_media_find_upstream_pad(), it is redundant now.

- Rename imx_media_find_upstream_subdev() to imx_media_pipeline_subdev()
  with an additional boolean argument for searching upstream or downstream.

- Add imx_media_pipeline_video_device() which is analogous to
  imx_media_pipeline_subdev() but searches for video devices.

- Remove imxmd pointer arg from all of the functions above, it was
  never used in those functions. With that change the i.MX5/6 CSI,
  VDIC, and IC sub-devices no longer require the media_device.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/staging/media/imx/imx-media-vdic.c b/drivers/staging/media/imx/imx-media-vdic.c
index 1cbefb508e73..4d90eecb04a2 100644
--- a/drivers/staging/media/imx/imx-media-vdic.c
+++ b/drivers/staging/media/imx/imx-media-vdic.c
@@ -61,7 +61,6 @@ struct vdic_priv {
 	struct device *ipu_dev;
 	struct ipu_soc *ipu;
 
-	struct imx_media_dev *md;
 	struct v4l2_subdev   sd;
 	struct media_pad pad[VDIC_NUM_PADS];
 
@@ -923,12 +922,11 @@ static const struct v4l2_subdev_internal_ops vdic_internal_ops = {
 	.unregistered = vdic_unregistered,
 };
 
-struct v4l2_subdev *imx_media_vdic_register(struct imx_media_dev *imxmd,
+struct v4l2_subdev *imx_media_vdic_register(struct v4l2_device *v4l2_dev,
 					    struct device *ipu_dev,
 					    struct ipu_soc *ipu,
 					    u32 grp_id)
 {
-	struct v4l2_device *v4l2_dev = &imxmd->v4l2_dev;
 	struct vdic_priv *priv;
 	int ret;
 
@@ -938,7 +936,6 @@ struct v4l2_subdev *imx_media_vdic_register(struct imx_media_dev *imxmd,
 
 	priv->ipu_dev = ipu_dev;
 	priv->ipu = ipu;
-	priv->md = imxmd;
 
 	v4l2_subdev_init(&priv->sd, &vdic_subdev_ops);
 	v4l2_set_subdevdata(&priv->sd, priv);