[mutter] kms/device: Disable modifiers when !DRM_CAP_ADDFB2_MODIFIERS

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

commit dd94c448e94b1033b90749d77c5dc587c3b8f9f4
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Tue Apr 5 17:06:21 2022 +0800

    kms/device: Disable modifiers when !DRM_CAP_ADDFB2_MODIFIERS
    
    Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2210
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2359>

 src/backends/native/meta-kms-device.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/backends/native/meta-kms-device.c b/src/backends/native/meta-kms-device.c
index bef1e20657..7c84f14f51 100644
--- a/src/backends/native/meta-kms-device.c
+++ b/src/backends/native/meta-kms-device.c
@@ -490,6 +490,9 @@ meta_kms_device_new (MetaKms            *kms,
   free (device->path);
   device->path = data.out_path;
 
+  if (!device->caps.addfb2_modifiers)
+    device->flags |= META_KMS_DEVICE_FLAG_DISABLE_MODIFIERS;
+
   return device;
 }