From 7446da8e1fbef95a92ecb624ae5352b94c02b0a2 Mon Sep 17 00:00:00 2001
From: Mykola Grymalyuk <48863253+khronokernel@users.noreply.github.com>
Date: Thu, 13 May 2021 08:32:23 -0600
Subject: [PATCH] Add agdpmod=vit9696 to all Nvidia Metal iMacs

Closes https://github.com/dortania/OpenCore-Legacy-Patcher/issues/217
---
 CHANGELOG.md       | 2 ++
 Resources/Build.py | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf4b39352..74a334236 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@
 ## 0.1.5
 - Fix crashing when Wireless module not present
 - Add iMac10,1 default dGPU pathing
+- Add agdpmod=vit9696 to all Nvidia Metal iMacs
+  - Fixes external display support on Nvidia iMac12,x
 
 ## 0.1.4
 - Fix Device Path formatting on 2012+ iMacs
diff --git a/Resources/Build.py b/Resources/Build.py
index b0200a485..7b8f58c2b 100644
--- a/Resources/Build.py
+++ b/Resources/Build.py
@@ -382,7 +382,7 @@ class BuildOpenCore:
                 self.get_kext_by_bundle_path("AppleBacklightFixup.kext")["Enabled"] = True
             elif self.model in ["iMac12,1", "iMac12,2"]:
                 print("- Adding Nvidia Brightness Control and DRM patches")
-                self.config["DeviceProperties"]["Add"][backlight_path] = {"@0,backlight-control": binascii.unhexlify("01000000"), "@0,built-in": binascii.unhexlify("01000000"), "shikigva": 256}
+                self.config["DeviceProperties"]["Add"][backlight_path] = {"@0,backlight-control": binascii.unhexlify("01000000"), "@0,built-in": binascii.unhexlify("01000000"), "shikigva": 256, "agdpmod": "vit9696"}
                 print("- Disabling unsupported iGPU")
                 self.config["DeviceProperties"]["Add"]["PciRoot(0x0)/Pci(0x2,0x0)"] = {"name": binascii.unhexlify("23646973706C6179"), "IOName": "#display", "class-code": binascii.unhexlify("FFFFFFFF")}
                 shutil.copy(self.constants.backlight_path, self.constants.kexts_path)