From a600a58f897a362657fb8d638d0a3c53feb0b72e Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Mon, 13 Nov 2023 18:35:29 +0100
Subject: [PATCH] radv: set radv_zero_vram=true for Unreal Engine 4/5

Unreal Engine seems to rely on uninitialized memory and
RADV_DEBUG=zerovram fixes a bunch of issues.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9025
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9380
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9026
Cc: mesa-stable
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26188>
(cherry picked from commit bb92c34c2859c2f5b42c9b6ba4f5603d79b72d33)
---
 .pick_status.json              | 2 +-
 src/util/00-radv-defaults.conf | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/.pick_status.json b/.pick_status.json
index 33f11b6..9020553 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -164,7 +164,7 @@
         "description": "radv: set radv_zero_vram=true for Unreal Engine 4/5",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null
diff --git a/src/util/00-radv-defaults.conf b/src/util/00-radv-defaults.conf
index df89a79..5678c5e 100644
--- a/src/util/00-radv-defaults.conf
+++ b/src/util/00-radv-defaults.conf
@@ -59,6 +59,7 @@ Application bugs worked around in this file:
         <engine engine_name_match="^UnrealEngine"> <!-- UE4/5 Vulkan RHI -->
             <option name="radv_flush_before_query_copy" value="true" />
             <option name="radv_flush_before_timestamp_write" value="true" />
+            <option name="radv_zero_vram" value="true" />
         </engine>
 
         <engine engine_name_match="DXVK_NvRemix">
-- 
2.7.4