staging: media: imx: Drop unused helper functions

The imx_media_find_subdev_by_fwnode(),
imx_media_find_subdev_by_devname(), imx_media_pipeline_csi2_channel()
and imx_media_pipeline_video_device() helper functions are not used.
Drop them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/staging/media/imx/imx-media-utils.c

@@ -626,36 +626,6 @@ void imx_media_grp_id_to_sd_name(char *sd_name, int sz, u32 grp_id, int ipu_id)
 }
 EXPORT_SYMBOL_GPL(imx_media_grp_id_to_sd_name);
 
-struct v4l2_subdev *
-imx_media_find_subdev_by_fwnode(struct imx_media_dev *imxmd,
-				struct fwnode_handle *fwnode)
-{
-	struct v4l2_subdev *sd;
-
-	list_for_each_entry(sd, &imxmd->v4l2_dev.subdevs, list) {
-		if (sd->fwnode == fwnode)
-			return sd;
-	}
-
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(imx_media_find_subdev_by_fwnode);
-
-struct v4l2_subdev *
-imx_media_find_subdev_by_devname(struct imx_media_dev *imxmd,
-				 const char *devname)
-{
-	struct v4l2_subdev *sd;
-
-	list_for_each_entry(sd, &imxmd->v4l2_dev.subdevs, list) {
-		if (!strcmp(devname, dev_name(sd->dev)))
-			return sd;
-	}
-
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(imx_media_find_subdev_by_devname);
-
 /*
  * Adds a video device to the master video device list. This is called
  * when a video device is registered.
@@ -756,25 +726,6 @@ find_pipeline_entity(struct media_entity *start, u32 grp_id,
 	return pad ? pad->entity : NULL;
 }
 
-/*
- * Find the upstream mipi-csi2 virtual channel reached from the given
- * start entity in the current pipeline.
- * Must be called with mdev->graph_mutex held.
- */
-int imx_media_pipeline_csi2_channel(struct media_entity *start_entity)
-{
-	struct media_pad *pad;
-	int ret = -EPIPE;
-
-	pad = imx_media_pipeline_pad(start_entity, IMX_MEDIA_GRP_ID_CSI2,
-				     0, true);
-	if (pad)
-		ret = pad->index - 1;
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(imx_media_pipeline_csi2_channel);
-
 /*
  * Find a subdev reached upstream from the given start entity in
  * the current pipeline.
@@ -794,25 +745,6 @@ imx_media_pipeline_subdev(struct media_entity *start_entity, u32 grp_id,
 }
 EXPORT_SYMBOL_GPL(imx_media_pipeline_subdev);
 
-/*
- * Find a subdev reached upstream from the given start entity in
- * the current pipeline.
- * Must be called with mdev->graph_mutex held.
- */
-struct video_device *
-imx_media_pipeline_video_device(struct media_entity *start_entity,
-				enum v4l2_buf_type buftype, bool upstream)
-{
-	struct media_entity *me;
-
-	me = find_pipeline_entity(start_entity, 0, buftype, upstream);
-	if (!me)
-		return ERR_PTR(-ENODEV);
-
-	return media_entity_to_video_device(me);
-}
-EXPORT_SYMBOL_GPL(imx_media_pipeline_video_device);
-
 /*
  * Turn current pipeline streaming on/off starting from entity.
  */

drivers/staging/media/imx/imx-media.h

@@ -201,24 +201,14 @@ int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 				  const struct imx_media_pixfmt *cc);
 void imx_media_grp_id_to_sd_name(char *sd_name, int sz,
 				 u32 grp_id, int ipu_id);
-struct v4l2_subdev *
-imx_media_find_subdev_by_fwnode(struct imx_media_dev *imxmd,
-				struct fwnode_handle *fwnode);
-struct v4l2_subdev *
-imx_media_find_subdev_by_devname(struct imx_media_dev *imxmd,
-				 const char *devname);
 void imx_media_add_video_device(struct imx_media_dev *imxmd,
 				struct imx_media_video_dev *vdev);
-int imx_media_pipeline_csi2_channel(struct media_entity *start_entity);
 struct media_pad *
 imx_media_pipeline_pad(struct media_entity *start_entity, u32 grp_id,
 		       enum v4l2_buf_type buftype, bool upstream);
 struct v4l2_subdev *
 imx_media_pipeline_subdev(struct media_entity *start_entity, u32 grp_id,
 			  bool upstream);
-struct video_device *
-imx_media_pipeline_video_device(struct media_entity *start_entity,
-				enum v4l2_buf_type buftype, bool upstream);
 
 struct imx_media_dma_buf {
 	void          *virt;