From fededa5f792564ba1c570df7193b3f9ffdd9b010 Mon Sep 17 00:00:00 2001
From: Peter Cai <peter@typeblog.net>
Date: Wed, 1 Jun 2022 22:40:48 -0400
Subject: [PATCH] init_gsi: Add qcom caf audio quirks

Force-disabling A2DP offloading is not implemented yet.
---
 init/Android.bp               |  1 +
 init/quirks.cpp               | 18 +++++++++++++-----
 init/quirks.h                 |  4 +++-
 init/quirks/soc/caf_audio.cpp | 21 +++++++++++++++++++++
 4 files changed, 38 insertions(+), 6 deletions(-)
 create mode 100644 init/quirks/soc/caf_audio.cpp

diff --git a/init/Android.bp b/init/Android.bp
index aaca8b4..3bfacd2 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -7,6 +7,7 @@ cc_binary {
         
         // SoC-specific quirks
         "quirks/soc/mtk_ril.cpp",
+        "quirks/soc/caf_audio.cpp",
         
         // Device-specific quirks
         "quirks/device/unihertz_keylayout.cpp",
diff --git a/init/quirks.cpp b/init/quirks.cpp
index bb40d26..fa74ec4 100644
--- a/init/quirks.cpp
+++ b/init/quirks.cpp
@@ -87,6 +87,16 @@ void Quirks::CopyFileKeepPerms(filesystem::path src, filesystem::path dst) {
     RestoreFilePermissions(src, dst);
 }
 
+int Quirks::OverrideWithBindMount(filesystem::path src, filesystem::path dst) {
+    int err = mount(src.c_str(), dst.c_str(), nullptr, MS_BIND, nullptr);
+
+    if (err < 0) {
+        ALOGE("bind mount %s on %s err = %d\n", src.c_str(), dst.c_str(), errno);
+    }
+
+    return err;
+}
+
 void Quirks::OverrideFileWith(filesystem::path p, function<void(istream&, ostream&)> proc) {
     if (!filesystem::is_regular_file(p)) return;
     
@@ -108,10 +118,9 @@ void Quirks::OverrideFileWith(filesystem::path p, function<void(istream&, ostrea
     RestoreFilePermissions(p, tmp_path);
     
     // Bind mount and override the file
-    int err = mount(tmp_path.c_str(), p.c_str(), nullptr, MS_BIND, nullptr);
-    
+    int err = OverrideWithBindMount(tmp_path, p);
+
     if (err < 0) {
-        ALOGE("bind mount %s on %s err = %d\n", tmp_path.c_str(), p.c_str(), errno);
         return;
     }
     
@@ -149,10 +158,9 @@ void Quirks::OverrideFolderWith(filesystem::path p, function<void(filesystem::pa
     
     proc(tmp_path);
     
-    int err = mount(tmp_path.c_str(), p.c_str(), nullptr, MS_BIND, nullptr);
+    int err = OverrideWithBindMount(tmp_path, p);
     
     if (err < 0) {
-        ALOGE("bind mount %s on %s err = %d\n", tmp_path.c_str(), p.c_str(), errno);
         return;
     }
     
diff --git a/init/quirks.h b/init/quirks.h
index e6e1f7e..740e7dd 100644
--- a/init/quirks.h
+++ b/init/quirks.h
@@ -39,7 +39,9 @@ public:
 namespace Quirks {
     void Add(DeviceQuirk* quirk);
     void Run();
-    
+
+    int OverrideWithBindMount(filesystem::path src, filesystem::path dst);
+
     void OverrideFileWith(filesystem::path p, function<void(istream&, ostream&)> proc);
     void OverrideFileReplaceSubstr(filesystem::path p, string pattern, string replacement);
     
diff --git a/init/quirks/soc/caf_audio.cpp b/init/quirks/soc/caf_audio.cpp
new file mode 100644
index 0000000..3f95130
--- /dev/null
+++ b/init/quirks/soc/caf_audio.cpp
@@ -0,0 +1,21 @@
+#include "../../quirks.h"
+
+#include <filesystem>
+
+using namespace std;
+
+class CafAudioQuirk : DeviceQuirk {
+public:
+    bool ShouldRun() {
+        return filesystem::exists("/vendor/etc/audio/audio_policy_configuration.xml");
+    }
+    
+    void Run() {
+        Quirks::OverrideWithBindMount("/vendor/etc/audio/audio_policy_configuration.xml", "/vendor/etc/audio_policy_configuration.xml");
+        if (filesystem::exists("/vendor/etc/a2dp_audio_policy_configuration.xml")) {
+            Quirks::OverrideFileReplaceSubstr("/vendor/etc/a2dp_audio_policy_configuration.xml", "bluetooth_qti", "a2dp");
+        }
+    }
+};
+
+LOAD_QUIRK(CafAudioQuirk);