[PATCH 2/3] drm: add define for Static_Metadata_Descriptor_ID

[Simon Ser]

This avoids hard-coding magic values in user-space, and makes our
documentation clearer.

Signed-off-by: Simon Ser <cont...@emersion.fr>
Cc: Harry Wentland <harry.wentl...@amd.com>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Sebastian Wick <sebastian.w...@redhat.com>
Cc: Joshua Ashton <jos...@froggi.es>
Cc: Pekka Paalanen <pekka.paala...@collabora.com>
---
 include/uapi/drm/drm_mode.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 997d23fb2d68..c0c40dc9e2f1 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -849,6 +849,16 @@ struct drm_color_lut {
        __u16 reserved;
 };
 
+/**
+ * enum drm_hdr_metadata_type - HDR metadata descriptor ID.
+ */
+enum drm_hdr_metadata_type {
+       /**
+        * @DRM_HDR_STATIC_METADATA_TYPE1: Static Metadata Type 1.
+        */
+       DRM_HDR_STATIC_METADATA_TYPE1 = 0,
+};
+
 /**
  * struct hdr_metadata_infoframe - HDR Metadata Infoframe Data.
  *
@@ -866,6 +876,7 @@ struct hdr_metadata_infoframe {
        __u8 eotf;
        /**
         * @metadata_type: Static_Metadata_Descriptor_ID.
+        * This must be &DRM_HDR_STATIC_METADATA_TYPE1.
         */
        __u8 metadata_type;
        /**
@@ -925,6 +936,7 @@ struct hdr_metadata_infoframe {
 struct hdr_output_metadata {
        /**
         * @metadata_type: Static_Metadata_Descriptor_ID.
+        * This must be &DRM_HDR_STATIC_METADATA_TYPE1.
         */
        __u32 metadata_type;
        /**
-- 
2.40.1