media: staging: rkisp1: isp: set metadata pads to MEDIA_BUS_FMT_METADATA_FIXED

Set the code of the metadata pads of the isp entity to
MEDIA_BUS_FMT_METADATA_FIXED and set the width and
height of their formats to 0. This solves the TODO
item:
"Fix pad format size for statistics and parameters entities."

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/rkisp1/TODO

@@ -1,4 +1,3 @@
-* Fix pad format size for statistics and parameters entities.
 * Fix checkpatch errors.
 
 NOTES:

drivers/staging/media/rkisp1/rkisp1-isp.c

@@ -574,7 +574,7 @@ static int rkisp1_isp_enum_mbus_code(struct v4l2_subdev *sd,
 	} else {
 		if (code->index > 0)
 			return -EINVAL;
-		code->code = MEDIA_BUS_FMT_FIXED;
+		code->code = MEDIA_BUS_FMT_METADATA_FIXED;
 		return 0;
 	}
 
@@ -633,10 +633,10 @@ static int rkisp1_isp_init_config(struct v4l2_subdev *sd,
 					      RKISP1_ISP_PAD_SINK_PARAMS);
 	src_fmt = v4l2_subdev_get_try_format(sd, cfg,
 					     RKISP1_ISP_PAD_SOURCE_STATS);
-	sink_fmt->width = RKISP1_DEFAULT_WIDTH;
-	sink_fmt->height = RKISP1_DEFAULT_HEIGHT;
+	sink_fmt->width = 0;
+	sink_fmt->height = 0;
 	sink_fmt->field = V4L2_FIELD_NONE;
-	sink_fmt->code = MEDIA_BUS_FMT_FIXED;
+	sink_fmt->code = MEDIA_BUS_FMT_METADATA_FIXED;
 	*src_fmt = *sink_fmt;
 
 	return 0;