[mutter] kms/crtc: Find GAMMA_LUT property

[Marge Bot <marge-bot src gnome org>]

commit eb78b6251594f2f21b8b897f181a597d36a0dc14
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Jul 16 22:19:52 2020 +0200

    kms/crtc: Find GAMMA_LUT property
    
    To be used by the atomic backend to implement setting gamma ramps.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1488>

 src/backends/native/meta-kms-crtc-private.h | 1 +
 src/backends/native/meta-kms-crtc.c         | 5 +++++
 2 files changed, 6 insertions(+)
---
diff --git a/src/backends/native/meta-kms-crtc-private.h b/src/backends/native/meta-kms-crtc-private.h
index bbf014bf56..5429989bf6 100644
--- a/src/backends/native/meta-kms-crtc-private.h
+++ b/src/backends/native/meta-kms-crtc-private.h
@@ -28,6 +28,7 @@ typedef enum _MetaKmsCrtcProp
 {
   META_KMS_CRTC_PROP_MODE_ID = 0,
   META_KMS_CRTC_PROP_ACTIVE,
+  META_KMS_CRTC_PROP_GAMMA_LUT,
   META_KMS_CRTC_N_PROPS
 } MetaKmsCrtcProp;
 
diff --git a/src/backends/native/meta-kms-crtc.c b/src/backends/native/meta-kms-crtc.c
index 7de317378b..38fb06fab7 100644
--- a/src/backends/native/meta-kms-crtc.c
+++ b/src/backends/native/meta-kms-crtc.c
@@ -245,6 +245,11 @@ init_proporties (MetaKmsCrtc       *crtc,
           .name = "ACTIVE",
           .type = DRM_MODE_PROP_RANGE,
         },
+      [META_KMS_CRTC_PROP_GAMMA_LUT] =
+        {
+          .name = "GAMMA_LUT",
+          .type = DRM_MODE_PROP_BLOB,
+        },
     }
   };