V4L/DVB (12519): soc-camera: put pixel format initialisation back in probe, add .put_formats()

The move of format translation initialisation into soc_camera_open() was
temporary for the soc-camera as platform driver intermediate step, put it back
into soc_camera_probe(). Also add a .put_formats() method to
soc_camera_host_ops to free any resources host driver might have allocated in
.get_formats().

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

1 files changed, 7 insertions, 0 deletions

diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index f623c010a539..2b7a8c663605 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -67,8 +67,15 @@ struct soc_camera_host_ops {
         void (*remove)(struct soc_camera_device *);
         int (*suspend)(struct soc_camera_device *, pm_message_t);
         int (*resume)(struct soc_camera_device *);
+        /*
+         * .get_formats() is called for each client device format, but
+         * .put_formats() is only called once. Further, if any of the calls to
+         * .get_formats() fail, .put_formats() will not be called at all, the
+         * failing .get_formats() must then clean up internally.
+         */
         int (*get_formats)(struct soc_camera_device *, int,
                            struct soc_camera_format_xlate *);
+        void (*put_formats)(struct soc_camera_device *);
         int (*set_crop)(struct soc_camera_device *, struct v4l2_rect *);
         int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *);
         int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *);