From 9acd336422a0d29d9ee80e93e5f323cfafa87faa Mon Sep 17 00:00:00 2001
From: David Marcec <dmarcecguzman@gmail.com>
Date: Wed, 29 Apr 2020 22:13:56 +1000
Subject: [PATCH] am: Properly implement GetDisplayVersion

Properly implement IApplicationFunctions::GetDisplayVersion
---
 src/core/hle/service/am/am.cpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/core/hle/service/am/am.cpp b/src/core/hle/service/am/am.cpp
index 5695d2521..276a3fc0c 100644
--- a/src/core/hle/service/am/am.cpp
+++ b/src/core/hle/service/am/am.cpp
@@ -1343,12 +1343,23 @@ void IApplicationFunctions::SetTerminateResult(Kernel::HLERequestContext& ctx) {
 }
 
 void IApplicationFunctions::GetDisplayVersion(Kernel::HLERequestContext& ctx) {
-    LOG_WARNING(Service_AM, "(STUBBED) called");
+    LOG_DEBUG(Service_AM, "called");
+
+    std::array<u8, 0x10> version_string{};
+
+    FileSys::PatchManager pm{system.CurrentProcess()->GetTitleID()};
+    const auto res = pm.GetControlMetadata();
+    if (res.first != nullptr) {
+        const auto& version = res.first->GetVersionString();
+        std::copy(version.begin(), version.end(), version_string.begin());
+    } else {
+        const u128 default_version = {1, 0};
+        std::memcpy(version_string.data(), default_version.data(), sizeof(u128));
+    }
 
     IPC::ResponseBuilder rb{ctx, 6};
     rb.Push(RESULT_SUCCESS);
-    rb.Push<u64>(1);
-    rb.Push<u64>(0);
+    rb.PushRaw(version_string);
 }
 
 void IApplicationFunctions::GetDesiredLanguage(Kernel::HLERequestContext& ctx) {