Add a workaround for RHBZ#1936991 (disable atomic KMS on tegra)

0001-Test-deny-atomic-KMS-for-tegra-RHBZ-1936991.patch

@@ -0,0 +1,33 @@
+From fdd8a6f6760034707428554f50c09db2c5f2efcb Mon Sep 17 00:00:00 2001
+From: Adam Williamson <awilliam@redhat.com>
+Date: Tue, 9 Mar 2021 17:21:59 -0800
+Subject: [PATCH] Test: deny atomic KMS for "tegra" (RHBZ #1936991)
+
+Signed-off-by: Adam Williamson <awilliam@redhat.com>
+---
+ data/61-mutter.rules                  | 1 +
+ src/backends/native/meta-kms-device.c | 1 +
+ 2 files changed, 2 insertions(+)
+
+diff --git a/data/61-mutter.rules b/data/61-mutter.rules
+index 59cc00007c..f04e536f80 100644
+--- a/data/61-mutter.rules
++++ b/data/61-mutter.rules
+@@ -1 +1,2 @@
+ DRIVER=="tegra-host1x", SUBSYSTEM=="platform", TAG+="mutter-device-requires-kms-modifiers"
++DRIVER=="tegra", SUBSYSTEM=="platform", TAG+="mutter-device-disable-atomic-kms"
+diff --git a/src/backends/native/meta-kms-device.c b/src/backends/native/meta-kms-device.c
+index b5b50d602c..f86ca2ab56 100644
+--- a/src/backends/native/meta-kms-device.c
++++ b/src/backends/native/meta-kms-device.c
+@@ -246,6 +246,7 @@ is_atomic_allowed (const char *driver_name)
+     "vmwgfx",
+     "vboxvideo",
+     "nvidia-drm",
++    "tegra",
+     NULL,
+   };
+ 
+-- 
+2.30.1
+