[media] media: davinci: vpif_display: use vb2_ops_wait_prepare/finish helper functions

this patch makes use of vb2_ops_wait_prepare/finish helper functions.
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/davinci/vpif_display.c

@@ -187,24 +187,6 @@ static void vpif_buf_cleanup(struct vb2_buffer *vb)
 	spin_unlock_irqrestore(&common->irqlock, flags);
 }
 
-static void vpif_wait_prepare(struct vb2_queue *vq)
-{
-	struct channel_obj *ch = vb2_get_drv_priv(vq);
-	struct common_obj *common;
-
-	common = &ch->common[VPIF_VIDEO_INDEX];
-	mutex_unlock(&common->lock);
-}
-
-static void vpif_wait_finish(struct vb2_queue *vq)
-{
-	struct channel_obj *ch = vb2_get_drv_priv(vq);
-	struct common_obj *common;
-
-	common = &ch->common[VPIF_VIDEO_INDEX];
-	mutex_lock(&common->lock);
-}
-
 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 
 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
@@ -339,8 +321,8 @@ static void vpif_stop_streaming(struct vb2_queue *vq)
 
 static struct vb2_ops video_qops = {
 	.queue_setup		= vpif_buffer_queue_setup,
-	.wait_prepare		= vpif_wait_prepare,
-	.wait_finish		= vpif_wait_finish,
+	.wait_prepare		= vb2_ops_wait_prepare,
+	.wait_finish		= vb2_ops_wait_finish,
 	.buf_prepare		= vpif_buffer_prepare,
 	.start_streaming	= vpif_start_streaming,
 	.stop_streaming		= vpif_stop_streaming,
@@ -1649,6 +1631,7 @@ static int vpif_probe_complete(void)
 		q->buf_struct_size = sizeof(struct vpif_disp_buffer);
 		q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 		q->min_buffers_needed = 1;
+		q->lock = &common->lock;
 
 		err = vb2_queue_init(q);
 		if (err) {