From 6d6dd148c45cf3a8721b302016044218618b3b59 Mon Sep 17 00:00:00 2001
From: ivanmeler <i_ivan@windowslive.com>
Date: Thu, 7 Jul 2022 10:32:53 +0000
Subject: [PATCH] DNM: disable hwc with a shim

---
 BoardConfigCommon.mk                      |  6 ++++-
 device-common.mk                          |  3 ++-
 shims/libexynosdisplay/Android.mk         | 26 ++++++++++++++++++++
 shims/libexynosdisplay/libexynosdisplay.c | 30 +++++++++++++++++++++++
 4 files changed, 63 insertions(+), 2 deletions(-)
 create mode 100644 shims/libexynosdisplay/Android.mk
 create mode 100644 shims/libexynosdisplay/libexynosdisplay.c

diff --git a/BoardConfigCommon.mk b/BoardConfigCommon.mk
index d7c65af..6a93f39 100644
--- a/BoardConfigCommon.mk
+++ b/BoardConfigCommon.mk
@@ -147,7 +147,11 @@ ENABLE_VENDOR_RIL_SERVICE := true
 # Shims
 TARGET_LD_SHIM_LIBS += \
     /system/lib/libexynoscamera.so|/vendor/lib/libexynoscamera_shim.so \
-    /system/lib64/libexynoscamera.so|/vendor/lib64/libexynoscamera_shim.so
+    /system/lib64/libexynoscamera.so|/vendor/lib64/libexynoscamera_shim.so \
+    /system/vendor/lib64/libexynosdisplay.so|/system/vendor/lib64/libexynosdisplay_shim.so \
+    /system/vendor/lib/libexynosdisplay.so|/system/vendor/lib/libexynosdisplay_shim.so \
+    /system/vendor/lib64/hw/hwcomposer.exynos5.so|/system/vendor/lib64/libexynosdisplay_shim.so \
+    /system/vendor/lib/hw/hwcomposer.exynos5.so|/system/vendor/lib/libexynosdisplay_shim.so
 
 # Soong namespaces
 PRODUCT_SOONG_NAMESPACES += $(LOCAL_PATH)
diff --git a/device-common.mk b/device-common.mk
index 8f483c6..32b5a87 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -280,7 +280,8 @@ $(call inherit-product, frameworks/native/build/phone-xhdpi-4096-dalvik-heap.mk)
 # Shims
 PRODUCT_PACKAGES += \
     libexynoscamera_shim \
-    libmemset
+    libmemset \
+    libexynosdisplay_shim
 
 # stagefright
 PRODUCT_PACKAGES += \
diff --git a/shims/libexynosdisplay/Android.mk b/shims/libexynosdisplay/Android.mk
new file mode 100644
index 0000000..7d92c8c
--- /dev/null
+++ b/shims/libexynosdisplay/Android.mk
@@ -0,0 +1,26 @@
+#
+# Copyright (C) 2017 The LineageOS Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := libexynosdisplay.c
+LOCAL_SHARED_LIBRARIES := liblog
+LOCAL_MODULE := libexynosdisplay_shim
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_CLASS := SHARED_LIBRARIES
+LOCAL_VENDOR_MODULE := true
+include $(BUILD_SHARED_LIBRARY)
diff --git a/shims/libexynosdisplay/libexynosdisplay.c b/shims/libexynosdisplay/libexynosdisplay.c
new file mode 100644
index 0000000..1d759a5
--- /dev/null
+++ b/shims/libexynosdisplay/libexynosdisplay.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "libexynosdisplay_shim"
+#define LOG_NDEBUG 1
+
+#include <cutils/log.h>
+#include <cutils/native_handle.h>
+
+//int32_t ExynosLayer::setLayerBuffer(buffer_handle_t buffer, int32_t acquireFence)
+bool _ZN11ExynosLayer14setLayerBufferEPK13native_handlei(buffer_handle_t buffer, int32_t acquireFence)
+{
+    ALOGV("SHIM: hijacking %s!", __func__);
+
+    /* Force this check to always return false */
+    return 0;
+}
-- 
2.20.1