1 files changed, 36 insertions, 1 deletions

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 57bfa59cda74..3cf3e946e331 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -186,6 +186,7 @@ enum v4l2_memory {
         V4L2_MEMORY_MMAP             = 1,
         V4L2_MEMORY_USERPTR          = 2,
         V4L2_MEMORY_OVERLAY          = 3,
+        V4L2_MEMORY_DMABUF           = 4,
 };
 
 /* see also http://vektor.theorem.ca/graphics/ycbcr/ */
@@ -602,6 +603,8 @@ struct v4l2_requestbuffers {
  *                      should be passed to mmap() called on the video node)
  * @userptr:            when memory is V4L2_MEMORY_USERPTR, a userspace pointer
  *                      pointing to this plane
+ * @fd:                 when memory is V4L2_MEMORY_DMABUF, a userspace file
+ *                      descriptor associated with this plane
  * @data_offset:        offset in the plane to the start of data; usually 0,
  *                      unless there is a header in front of the data
  *
@@ -616,6 +619,7 @@ struct v4l2_plane {
         union {
                 __u32           mem_offset;
                 unsigned long   userptr;
+                __s32           fd;
         } m;
         __u32                   data_offset;
         __u32                   reserved[11];
@@ -640,6 +644,8 @@ struct v4l2_plane {
  *              (or a "cookie" that should be passed to mmap() as offset)
  * @userptr:    for non-multiplanar buffers with memory == V4L2_MEMORY_USERPTR;
  *              a userspace pointer pointing to this buffer
+ * @fd:         for non-multiplanar buffers with memory == V4L2_MEMORY_DMABUF;
+ *              a userspace file descriptor associated with this buffer
  * @planes:     for multiplanar buffers; userspace pointer to the array of plane
  *              info structs for this buffer
  * @length:     size in bytes of the buffer (NOT its payload) for single-plane
@@ -666,6 +672,7 @@ struct v4l2_buffer {
                 __u32           offset;
                 unsigned long   userptr;
                 struct v4l2_plane *planes;
+                __s32           fd;
         } m;
         __u32                   length;
         __u32                   reserved2;
@@ -687,6 +694,33 @@ struct v4l2_buffer {
 #define V4L2_BUF_FLAG_NO_CACHE_INVALIDATE       0x0800
 #define V4L2_BUF_FLAG_NO_CACHE_CLEAN            0x1000
 
+/**
+ * struct v4l2_exportbuffer - export of video buffer as DMABUF file descriptor
+ *
+ * @index:      id number of the buffer
+ * @type:       enum v4l2_buf_type; buffer type (type == *_MPLANE for
+ *              multiplanar buffers);
+ * @plane:      index of the plane to be exported, 0 for single plane queues
+ * @flags:      flags for newly created file, currently only O_CLOEXEC is
+ *              supported, refer to manual of open syscall for more details
+ * @fd:         file descriptor associated with DMABUF (set by driver)
+ *
+ * Contains data used for exporting a video buffer as DMABUF file descriptor.
+ * The buffer is identified by a 'cookie' returned by VIDIOC_QUERYBUF
+ * (identical to the cookie used to mmap() the buffer to userspace). All
+ * reserved fields must be set to zero. The field reserved0 is expected to
+ * become a structure 'type' allowing an alternative layout of the structure
+ * content. Therefore this field should not be used for any other extensions.
+ */
+struct v4l2_exportbuffer {
+        __u32           type; /* enum v4l2_buf_type */
+        __u32           index;
+        __u32           plane;
+        __u32           flags;
+        __s32           fd;
+        __u32           reserved[11];
+};
+
 /*
  *      O V E R L A Y   P R E V I E W
  */
@@ -737,7 +771,7 @@ struct v4l2_window {
 struct v4l2_captureparm {
         __u32              capability;    /*  Supported modes */
         __u32              capturemode;   /*  Current mode */
-        struct v4l2_fract  timeperframe;  /*  Time per frame in .1us units */
+        struct v4l2_fract  timeperframe;  /*  Time per frame in seconds */
         __u32              extendedmode;  /*  Driver-specific extensions */
         __u32              readbuffers;   /*  # of buffers for read */
         __u32              reserved[4];
@@ -1888,6 +1922,7 @@ struct v4l2_create_buffers {
 #define VIDIOC_S_FBUF            _IOW('V', 11, struct v4l2_framebuffer)
 #define VIDIOC_OVERLAY           _IOW('V', 14, int)
 #define VIDIOC_QBUF             _IOWR('V', 15, struct v4l2_buffer)
+#define VIDIOC_EXPBUF           _IOWR('V', 16, struct v4l2_exportbuffer)
 #define VIDIOC_DQBUF            _IOWR('V', 17, struct v4l2_buffer)
 #define VIDIOC_STREAMON          _IOW('V', 18, int)
 #define VIDIOC_STREAMOFF         _IOW('V', 19, int)