porsche: Bring back screen-off touch gestures

Introduce custom power HAL extension, inspired by LineageOS/android_hardware_oplus@ce722bd

Change-Id: Ied1f685f398a7fa739738d5e99cb9626fadd50cf

BoardConfig.mk

@@ -139,6 +139,9 @@ BOARD_VENDOR_SEPOLICY_DIRS += $(DEVICE_PATH)/sepolicy/vendor
 SYSTEM_EXT_PRIVATE_SEPOLICY_DIRS += $(DEVICE_PATH)/sepolicy/private
 SYSTEM_EXT_PUBLIC_SEPOLICY_DIRS += $(DEVICE_PATH)/sepolicy/public
 
+# Touch
+TARGET_POWER_FEATURE_EXT_LIB := //$(DEVICE_PATH):libpowerfeature_ext_porsche
+
 # UFS
 #namespace definition for librecovery_updater
 #differentiate legacy 'sg' or 'bsg' framework

power/Android.bp

@@ -0,0 +1,15 @@
+//
+// Copyright (C) 2023 Paranoid Android
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+cc_library_static {
+    name: "libpowerfeature_ext_porsche",
+    srcs: ["power-feature.cpp"],
+    shared_libs: [
+        "libbase",
+        "vendor.aospa.power-V1-ndk",
+    ],
+    vendor: true,
+}

power/power-feature.cpp

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2023 Paranoid Android
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <aidl/vendor/aospa/power/BnPowerFeature.h>
+#include <android-base/file.h>
+#include <android-base/strings.h>
+#include <unordered_map>
+
+#define GESTURE_ENABLE_PATH "/proc/touchpanel/double_tap_enable_indep"
+
+using ::android::base::ReadFileToString;
+using ::android::base::Trim;
+using ::android::base::WriteStringToFile;
+
+namespace aidl {
+namespace vendor {
+namespace aospa {
+namespace power {
+
+// based on values in touchpanel_common.h
+static const std::unordered_map<Feature, int> GESTURE_MAP = {
+    {Feature::DOUBLE_TAP, 1},
+    {Feature::DRAW_V, 2},
+    {Feature::DRAW_INVERSE_V, 3},
+    {Feature::DRAW_O, 6},
+    {Feature::DRAW_M, 12},
+    {Feature::DRAW_W, 13},
+    {Feature::DRAW_ARROW_LEFT, 5},
+    {Feature::DRAW_ARROW_RIGHT, 4},
+    {Feature::ONE_FINGER_SWIPE_UP, 11},
+    {Feature::ONE_FINGER_SWIPE_RIGHT, 8},
+    {Feature::ONE_FINGER_SWIPE_DOWN, 10},
+    {Feature::ONE_FINGER_SWIPE_LEFT, 9},
+    {Feature::TWO_FINGER_SWIPE, 7},
+    {Feature::DRAW_S, 18},
+};
+
+bool setDeviceSpecificFeature(Feature feature, bool enabled) {
+    int contents = 0;
+    auto gesture = GESTURE_MAP.find(feature);
+
+    if (gesture == GESTURE_MAP.end()) {
+        // Unsupported gesture
+        return false;
+    }
+
+    if (std::string tmp; ReadFileToString(GESTURE_ENABLE_PATH, &tmp)) {
+        contents = std::stoi(Trim(tmp), nullptr, 16);
+    }
+
+    if (enabled) {
+        contents |= (1 << gesture->second);
+    } else {
+        contents &= ~(1 << gesture->second);
+    }
+
+    return WriteStringToFile(std::to_string(contents), GESTURE_ENABLE_PATH, true);
+}
+
+}  // namespace power
+}  // namespace aospa
+}  // namespace vendor
+}  // namespace aidl