Allow configuring GMUX usage for Windows

Closes https://github.com/dortania/OpenCore-Legacy-Patcher/issues/502

Resources/Build.py

@@ -166,7 +166,7 @@ class BuildOpenCore:
             ("MarvelYukonEthernet.kext", self.constants.marvel_version, self.constants.marvel_path, lambda: self.model in ModelArray.EthernetMarvell),
             ("CatalinaBCM5701Ethernet.kext", self.constants.bcm570_version, self.constants.bcm570_path, lambda: self.model in ModelArray.EthernetBroadcom),
             # Legacy audio
-            ("AppleALC.kext", self.constants.applealc_version, self.constants.applealc_path, lambda: self.model in ModelArray.LegacyAudio or self.model in ModelArray.MacPro),
+            ("AppleALC.kext", self.constants.applealc_version, self.constants.applealc_path, lambda: (self.model in ModelArray.LegacyAudio or self.model in ModelArray.MacPro) and self.constants.set_alc_usage is True),
             # IDE patch
             ("AppleIntelPIIXATA.kext", self.constants.piixata_version, self.constants.piixata_path, lambda: self.model in ModelArray.IDEPatch),
             # Misc
@@ -711,7 +711,7 @@ class BuildOpenCore:
         if self.constants.validate is False:
             print("- Adding bootmgfw.efi BlessOverride")
             self.config["Misc"]["BlessOverride"] += ["\\EFI\\Microsoft\\Boot\\bootmgfw.efi"]
-        if self.model in ModelArray.dGPU_switch:
+        if self.model in ModelArray.dGPU_switch and self.constants.dGPU_switch is True:
             print("- Allowing GMUX switching in Windows")
             self.config["Booter"]["Quirks"]["SignalAppleOS"] = True
         if self.constants.allow_fv_root is True:

Resources/CliMenu.py

@@ -631,3 +631,49 @@ handle acceleration tasks.
         print("")
         print(self.constants.computer)
         input("\nPress [ENTER] to exit: ")
+    
+    def applealc_support(self):
+        Utilities.cls()
+        Utilities.header(["Set AppleALC usage"])
+        print(
+            """
+By default this patcher will install audio patches in-memory via
+AppleALC. However for systems that cannot achieve boot screen support,
+this option will allow you to install the legacy AppleHDA patch via
+root patching.
+
+If AppleALC is detected, the Patcher will not install AppleHDA.
+        """
+        )
+
+        change_menu = input("Set AppleALC usage?(y/n/q): ")
+        if change_menu in {"y", "Y", "yes", "Yes"}:
+            self.constants.set_alc_usage = True
+        elif change_menu in {"n", "N", "no", "No"}:
+            self.constants.set_alc_usage = False
+        elif change_menu in {"q", "Q", "Quit", "quit"}:
+            print("Returning to previous menu")
+        else:
+            self.applealc_support()
+    
+    def dGPU_switch_support(self):
+        Utilities.cls()
+        Utilities.header(["Set Windows GMUX support"])
+        print(
+            """
+With OCLP, we're able to restore iGPU funbctionality on iGPU+dGPU
+MacBook Pros. However for some this may not be desires, ie. eGPUs
+for Windows may prefer to only work with the dGPU and eGPU present.
+
+        """
+        )
+
+        change_menu = input("Set Windows GMUX support?(y/n/q): ")
+        if change_menu in {"y", "Y", "yes", "Yes"}:
+            self.constants.dGPU_switch = True
+        elif change_menu in {"n", "N", "no", "No"}:
+            self.constants.dGPU_switch = False
+        elif change_menu in {"q", "Q", "Quit", "quit"}:
+            print("Returning to previous menu")
+        else:
+            self.dGPU_switch_support()

Resources/Constants.py

@@ -14,7 +14,7 @@ class Constants:
     def __init__(self):
         # Patcher Versioning
         self.patcher_version = "0.3.0"  #              OpenCore-Legacy-Patcher
-        self.patcher_support_pkg_version = "0.1.3"  #  PatcherSupportPkg
+        self.patcher_support_pkg_version = "0.1.4"  #  PatcherSupportPkg
 
         # OpenCore Versioning
         # https://github.com/acidanthera/OpenCorePkg
@@ -141,6 +141,8 @@ class Constants:
         self.disallow_cpufriend = False  #   Disable CPUFriend
         self.enable_wake_on_wlan = False  #  Allow Wake on WLAN for modern Broadcom
         self.disable_thunderbolt = False  #  Disable Thunderbolt Controller
+        self.set_alc_usage = True  #         Set AppleALC usage
+        self.dGPU_switch = True #            Set Display GPU Switching for Windows
 
         # OS Versions
         ## Based off Major Kernel Version
@@ -564,9 +566,14 @@ class Constants:
         return self.payload_apple_private_frameworks_path / Path("Brightness-Control")
 
     # Apple Extensions
+    # El Capitan Extensions
     @property
     def audio_path(self):
         return self.payload_apple_kexts_path / Path("Audio")
+    # High Sierra Extensions
+    @property
+    def audio_v2_path(self):
+        return self.payload_apple_kexts_path / Path("Audio-v2")
 
     # GPU Kexts and Bundles
 

Resources/SysPatch.py

@@ -294,8 +294,11 @@ set million colour before rebooting"""
         Utilities.process_status(self.elevated(["chown", "-Rf", "root:wheel", f"{self.mount_private_frameworks}/DisplayServices.framework"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT))
 
     def add_audio_patch(self):
-        self.delete_old_binaries(SysPatchArray.DeleteVolumeControl)
-        self.add_new_binaries(SysPatchArray.AddVolumeControl, self.constants.audio_path)
+        if self.model in ["iMac7,1", "iMac8,1"]:
+            self.delete_old_binaries(SysPatchArray.DeleteVolumeControl)
+            self.add_new_binaries(SysPatchArray.AddVolumeControl, self.constants.audio_path)
+        else:
+            self.add_new_binaries(SysPatchArray.AddVolumeControlv2, self.constants.audio_v2_path)
 
     def add_wifi_patch(self):
         print("- Merging Wireless CoreSerices patches")
@@ -668,7 +671,9 @@ set million colour before rebooting"""
             if self.constants.detected_os > self.constants.catalina:
                 self.brightness_legacy = True
 
-        if self.model in ["iMac7,1", "iMac8,1"]:
+        if self.model in ["iMac7,1", "iMac8,1"] or (self.model in ModelArray.LegacyAudio and Utilities.check_kext_loaded("AppleALC", self.constants.detected_os) is False):
+            # Special hack for systems with botched GOPs
+            # TL;DR: No Boot Screen breaks Lilu, therefore breaking audio
             if self.constants.detected_os > self.constants.catalina:
                 self.legacy_audio = True
 

Resources/SysPatchArray.py

@@ -187,6 +187,10 @@ AddVolumeControl = [
     "IOAudioFamily.kext",
 ]
 
+AddVolumeControlv2 = [
+    "AppleHDA.kext",
+]
+
 DeleteVolumeControl = [
     "AppleVirtIO.kext",
     "AppleVirtualGraphics.kext",

Resources/Utilities.py

@@ -152,6 +152,15 @@ def amfi_status():
     else:
         return True
 
+def check_kext_loaded(kext_name, os_version):
+    if os_version > Constants.Constants().catalina:
+        kext_loaded = subprocess.run(["kmutil", "showloaded", "--list-only", "--variant-suffix", "release"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    else:
+        kext_loaded = subprocess.run(["kextstat", "-l"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    if kext_name in kext_loaded.stdout.decode():
+        return True
+    else:
+        return False
 
 def check_oclp_boot():
     if get_nvram("OCLP-Version", "4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102", decode=True):