media: uapi: add MEDIA_BUS_FMT_METADATA_FIXED media bus format.

MEDIA_BUS_FMT_METADATA_FIXED should be used when
the same driver handles both sides of the link and
the bus format is a fixed metadata format that is
not configurable from userspace.
The width and height will be set to 0 for this format.

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

Documentation/userspace-api/media/v4l/subdev-formats.rst

@@ -7899,3 +7899,30 @@ formats.
       - 0x5001
       - Interleaved raw UYVY and JPEG image format with embedded meta-data
 	used by Samsung S3C73MX camera sensors.
+
+.. _v4l2-mbus-metadata-fmts:
+
+Metadata Formats
+^^^^^^^^^^^^^^^^
+
+This section lists all metadata formats.
+
+The following table lists the existing metadata formats.
+
+.. tabularcolumns:: |p{8.0cm}|p{1.4cm}|p{7.7cm}|
+
+.. flat-table:: Metadata formats
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      - Comments
+    * .. _MEDIA-BUS-FMT-METADATA-FIXED:
+
+      - MEDIA_BUS_FMT_METADATA_FIXED
+      - 0x7001
+      - This format should be used when the same driver handles
+	both sides of the link and the bus format is a fixed
+	metadata format that is not configurable from userspace.
+	Width and height will be set to 0 for this format.

include/uapi/linux/media-bus-format.h

@@ -156,4 +156,12 @@
 /* HSV - next is	0x6002 */
 #define MEDIA_BUS_FMT_AHSV8888_1X32		0x6001
 
+/*
+ * This format should be used when the same driver handles
+ * both sides of the link and the bus format is a fixed
+ * metadata format that is not configurable from userspace.
+ * Width and height will be set to 0 for this format.
+ */
+#define MEDIA_BUS_FMT_METADATA_FIXED		0x7001
+
 #endif /* __LINUX_MEDIA_BUS_FORMAT_H */