V4L/DVB: v4l: Add a v4l2_subdev host private data field

The existing priv field stores subdev private data owned by the subdev
driver. Host (bridge) drivers might need to store per-subdev
host-specific data, such as a pointer to platform data.

Add a v4l2_subdev host_priv field to store host-specific data, and
rename the existing priv field to dev_priv.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 16 insertions, 4 deletions

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 905879d7742f..b0316a7cf08d 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -438,17 +438,28 @@ struct v4l2_subdev {
         /* can be used to group similar subdevs, value is driver-specific */
         u32 grp_id;
         /* pointer to private data */
-        void *priv;
+        void *dev_priv;
+        void *host_priv;
 };
 
 static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
 {
-        sd->priv = p;
+        sd->dev_priv = p;
 }
 
 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
 {
-        return sd->priv;
+        return sd->dev_priv;
+}
+
+static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p)
+{
+        sd->host_priv = p;
+}
+
+static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
+{
+        return sd->host_priv;
 }
 
 static inline void v4l2_subdev_init(struct v4l2_subdev *sd,
@@ -462,7 +473,8 @@ static inline void v4l2_subdev_init(struct v4l2_subdev *sd,
         sd->flags = 0;
         sd->name[0] = '\0';
         sd->grp_id = 0;
-        sd->priv = NULL;
+        sd->dev_priv = NULL;
+        sd->host_priv = NULL;
 }
 
 /* Call an ops of a v4l2_subdev, doing the right checks against