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

From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

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>
Priority: low
---
 drivers/media/video/soc_camera.c |   50 ++++++++++++++++++++++++++-----------
 include/media/soc_camera.h       |    7 +++++
 2 files changed, 42 insertions(+), 15 deletions(-)

1 files changed, 7 insertions, 0 deletions

diff --git a/linux/include/media/soc_camera.h b/linux/include/media/soc_camera.h
index f623c010a..2b7a8c663 100644
--- a/linux/include/media/soc_camera.h
+++ b/linux/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 *);