struct v4l2_fwnode_endpoint *ep)
{
struct device_node *endpoint, *port;
- struct media_entity *src;
struct v4l2_subdev *sd;
struct media_pad *pad;
return -EPIPE;
sd = priv->src_sd;
- src = &sd->entity;
- if (src->function == MEDIA_ENT_F_VID_MUX) {
+ switch (sd->grp_id) {
+ case IMX_MEDIA_GRP_ID_CSI_MUX:
/*
- * CSI is connected directly to video mux, skip up to
+ * CSI is connected directly to CSI mux, skip up to
* CSI-2 receiver if it is in the path, otherwise stay
- * with video mux.
+ * with the CSI mux.
*/
- sd = imx_media_pipeline_subdev(src, IMX_MEDIA_GRP_ID_CSI2,
+ sd = imx_media_pipeline_subdev(&sd->entity,
+ IMX_MEDIA_GRP_ID_CSI2,
true);
- if (!IS_ERR(sd))
- src = &sd->entity;
+ if (IS_ERR(sd))
+ sd = priv->src_sd;
+ break;
+ case IMX_MEDIA_GRP_ID_CSI2:
+ break;
+ default:
+ /*
+ * the source is neither the CSI mux nor the CSI-2 receiver,
+ * get the source pad directly upstream from CSI itself.
+ */
+ sd = &priv->sd;
+ break;
}
- /*
- * If the source is neither the video mux nor the CSI-2 receiver,
- * get the source pad directly upstream from CSI itself.
- */
- if (src->function != MEDIA_ENT_F_VID_MUX &&
- sd->grp_id != IMX_MEDIA_GRP_ID_CSI2)
- src = &priv->sd.entity;
-
- /* get source pad of entity directly upstream from src */
- pad = imx_media_pipeline_pad(src, 0, 0, true);
+ /* get source pad of entity directly upstream from sd */
+ pad = imx_media_pipeline_pad(&sd->entity, 0, 0, true);
if (!pad)
return -ENODEV;
struct csi_priv *priv = notifier_to_dev(notifier);
struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD];
+ /*
+ * If the subdev is a video mux, it must be one of the CSI
+ * muxes. Mark it as such via its group id.
+ */
+ if (sd->entity.function == MEDIA_ENT_F_VID_MUX)
+ sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX;
+
return v4l2_create_fwnode_links_to_pad(sd, sink);
}
struct imx7_csi *csi = imx7_csi_notifier_to_dev(notifier);
struct media_pad *sink = &csi->sd.entity.pads[IMX7_CSI_PAD_SINK];
+ /* The bound subdev must always be the CSI mux */
+ if (WARN_ON(sd->entity.function != MEDIA_ENT_F_VID_MUX))
+ return -ENXIO;
+
+ /* Mark it as such via its group id */
+ sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX;
+
return v4l2_create_fwnode_links_to_pad(sd, sink);
}