[media] V4L: soc-camera: add a livecrop host operation

Add an soc-camera host livecrop operation to implement live zoom. If
a host driver implements it, it should take care to preserve output
frame format, then live crop doesn't break streaming.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index f80b5372baf3..844cd09d7d3e 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -80,6 +80,11 @@ struct soc_camera_host_ops {
         int (*cropcap)(struct soc_camera_device *, struct v4l2_cropcap *);
         int (*get_crop)(struct soc_camera_device *, struct v4l2_crop *);
         int (*set_crop)(struct soc_camera_device *, struct v4l2_crop *);
+        /*
+         * The difference to .set_crop() is, that .set_livecrop is not allowed
+         * to change the output sizes
+         */
+        int (*set_livecrop)(struct soc_camera_device *, struct v4l2_crop *);
         int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *);
         int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *);
         void (*init_videobuf)(struct videobuf_queue *,