[media] vb2: set timestamp when using write()

When using write() to write data to an output video node the vb2 core
should set timestamps if V4L2_BUF_FLAG_TIMESTAMP_COPY is set. Nobody
else is able to provide this information with the write() operation.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 0f495f1..07ab067 100644 (file)
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -22,6 +22,7 @@
 #include <media/v4l2-dev.h>
 #include <media/v4l2-fh.h>
 #include <media/v4l2-event.h>
+#include <media/v4l2-common.h>
 #include <media/videobuf2-core.h>
 
 static int debug;
@@ -2800,6 +2801,14 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
 {
        struct vb2_fileio_data *fileio;
        struct vb2_fileio_buf *buf;
+       /*
+        * When using write() to write data to an output video node the vb2 core
+        * should set timestamps if V4L2_BUF_FLAG_TIMESTAMP_COPY is set. Nobody
+        * else is able to provide this information with the write() operation.
+        */
+       bool set_timestamp = !read &&
+               (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+               V4L2_BUF_FLAG_TIMESTAMP_COPY;
        int ret, index;
 
        dprintk(3, "mode %s, offset %ld, count %zd, %sblocking\n",
@@ -2901,6 +2910,8 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
                fileio->b.memory = q->memory;
                fileio->b.index = index;
                fileio->b.bytesused = buf->pos;
+               if (set_timestamp)
+                       v4l2_get_timestamp(&fileio->b.timestamp);
                ret = vb2_internal_qbuf(q, &fileio->b);
                dprintk(5, "vb2_dbuf result: %d\n", ret);
                if (ret)