[media] V4L: add media bus configuration subdev operations

Add media bus configuration types and two subdev operations to get
supported mediabus configurations and to set a specific configuration.
Subdevs can support several configurations, e.g., they can send video data
on 1 or several lanes, can be configured to use a specific CSI-2 channel,
in such cases subdevice drivers return bitmasks with all respective bits
set. When a set-configuration operation is called, it has to specify a
non-ambiguous configuration.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 9ff0ab9069d..257da1a30f6 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -267,6 +267,12 @@ struct v4l2_subdev_audio_ops {
    try_mbus_fmt: try to set a pixel format on a video data source
 
    s_mbus_fmt: set a pixel format on a video data source
+
+   g_mbus_config: get supported mediabus configurations
+
+   s_mbus_config: set a certain mediabus configuration. This operation is added
+        for compatibility with soc-camera drivers and should not be used by new
+        software.
  */
 struct v4l2_subdev_video_ops {
         int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
@@ -310,6 +316,10 @@ struct v4l2_subdev_video_ops {
                             struct v4l2_mbus_framefmt *fmt);
         int (*s_mbus_fmt)(struct v4l2_subdev *sd,
                           struct v4l2_mbus_framefmt *fmt);
+        int (*g_mbus_config)(struct v4l2_subdev *sd,
+                             struct v4l2_mbus_config *cfg);
+        int (*s_mbus_config)(struct v4l2_subdev *sd,
+                             const struct v4l2_mbus_config *cfg);
 };
 
 /*