V4L/DVB (12543): v4l: introduce string control support.

The upcoming RDS encoder needs support for string controls. This patch
implements the core implementation.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 293ba181f95a..9ab4cbe676fd 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -167,6 +167,7 @@ enum v4l2_ctrl_type {
         V4L2_CTRL_TYPE_BUTTON        = 4,
         V4L2_CTRL_TYPE_INTEGER64     = 5,
         V4L2_CTRL_TYPE_CTRL_CLASS    = 6,
+        V4L2_CTRL_TYPE_STRING        = 7,
 };
 
 enum v4l2_tuner_type {
@@ -795,11 +796,12 @@ struct v4l2_control {
 
 struct v4l2_ext_control {
         __u32 id;
-        __u32 reserved2[2];
+        __u32 size;
+        __u32 reserved2[1];
         union {
                 __s32 value;
                 __s64 value64;
-                void *reserved;
+                char *string;
         };
 } __attribute__ ((packed));