media: vicodec: add V4L2_CID_MIN_BUFFERS_FOR_OUTPUT

The stateful encoder requires the presence of this control.
Since a single buffer is sufficient for vicodec, we just
set this control to 1.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vicodec/vicodec-core.c

@@ -1801,13 +1801,16 @@ static int vicodec_open(struct file *file)
 	file->private_data = &ctx->fh;
 	ctx->dev = dev;
 	hdl = &ctx->hdl;
-	v4l2_ctrl_handler_init(hdl, 4);
+	v4l2_ctrl_handler_init(hdl, 5);
 	v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
 			  1, 16, 1, 10);
 	v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_FWHT_I_FRAME_QP,
 			  1, 31, 1, 20);
 	v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_FWHT_P_FRAME_QP,
 			  1, 31, 1, 20);
+	if (ctx->is_enc)
+		v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops,
+				  V4L2_CID_MIN_BUFFERS_FOR_OUTPUT, 1, 1, 1, 1);
 	if (ctx->is_stateless)
 		v4l2_ctrl_new_custom(hdl, &vicodec_ctrl_stateless_state, NULL);
 	if (hdl->error) {