[media] exynos-gsc: propagate timestamps from src to dst buffers

Make gsc-m2m propagate the timestamp field from source to destination
buffers.
Signed-off-by: John Sheu <sheu@google.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/exynos-gsc/gsc-m2m.c

@@ -99,22 +99,28 @@ static void gsc_m2m_job_abort(void *priv)
 		gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
 }
 
-static int gsc_fill_addr(struct gsc_ctx *ctx)
+static int gsc_get_bufs(struct gsc_ctx *ctx)
 {
 	struct gsc_frame *s_frame, *d_frame;
-	struct vb2_buffer *vb = NULL;
+	struct vb2_buffer *src_vb, *dst_vb;
 	int ret;
 
 	s_frame = &ctx->s_frame;
 	d_frame = &ctx->d_frame;
 
-	vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
-	ret = gsc_prepare_addr(ctx, vb, s_frame, &s_frame->addr);
+	src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
+	ret = gsc_prepare_addr(ctx, src_vb, s_frame, &s_frame->addr);
+	if (ret)
+		return ret;
+
+	dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+	ret = gsc_prepare_addr(ctx, dst_vb, d_frame, &d_frame->addr);
 	if (ret)
 		return ret;
 
-	vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
-	return gsc_prepare_addr(ctx, vb, d_frame, &d_frame->addr);
+	dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
+
+	return 0;
 }
 
 static void gsc_m2m_device_run(void *priv)
@@ -148,7 +154,7 @@ static void gsc_m2m_device_run(void *priv)
 		goto put_device;
 	}
 
-	ret = gsc_fill_addr(ctx);
+	ret = gsc_get_bufs(ctx);
 	if (ret) {
 		pr_err("Wrong address");
 		goto put_device;