sm8350-common: Add power HAL extension and use xiaomi-touch to handle dt2w

Change-Id: I5c65e0df255853eb2b3018a27ceb807c111bc4df

BoardConfigCommon.mk

@@ -147,7 +147,7 @@ TARGET_COPY_OUT_PRODUCT := product
 TARGET_BOARD_PLATFORM := lahaina
 
 # Power
-TARGET_TAP_TO_WAKE_NODE := "/sys/devices/virtual/touch/tp_dev/double_tap"
+TARGET_POWERHAL_MODE_EXT := $(COMMON_PATH)/power/power-mode.cpp
 
 # Properties
 TARGET_ODM_PROP += $(COMMON_PATH)/odm.prop

power/power-mode.cpp

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <aidl/android/hardware/power/BnPower.h>
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <sys/ioctl.h>
+
+// defines from drivers/input/touchscreen/xiaomi/xiaomi_touch.h
+#define SET_CUR_VALUE 0
+#define Touch_Doubletap_Mode 14
+
+#define TOUCH_DEV_PATH "/dev/xiaomi-touch"
+#define TOUCH_ID 0
+#define TOUCH_MAGIC 0x5400
+#define TOUCH_IOC_SETMODE TOUCH_MAGIC + SET_CUR_VALUE
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace power {
+namespace impl {
+
+using ::aidl::android::hardware::power::Mode;
+
+bool isDeviceSpecificModeSupported(Mode type, bool* _aidl_return) {
+    switch (type) {
+        case Mode::DOUBLE_TAP_TO_WAKE:
+            *_aidl_return = true;
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool setDeviceSpecificMode(Mode type, bool enabled) {
+    switch (type) {
+        case Mode::DOUBLE_TAP_TO_WAKE: {
+            int fd = open(TOUCH_DEV_PATH, O_RDWR);
+            int arg[3] = {TOUCH_ID, Touch_Doubletap_Mode, enabled ? 1 : 0};
+            ioctl(fd, TOUCH_IOC_SETMODE, &arg);
+            close(fd);
+            return true;
+        }
+        default:
+            return false;
+    }
+}
+
+}  // namespace impl
+}  // namespace power
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl

rootdir/etc/init.target.rc

@@ -118,6 +118,10 @@ on boot
     chown system system /sys/class/thermal/thermal_message/balance_mode
     chown system system /sys/devices/virtual/touch/tp_dev/double_tap
 
+    # Set xiaomi touch permissions
+    chown system system /dev/xiaomi-touch
+    chmod 0660 /dev/xiaomi-touch
+
     write /dev/cpuset/audio-app/cpus 1-2
 
     # Add a cpuset for the camera daemon

sepolicy/vendor/file_contexts

@@ -20,6 +20,9 @@
 # Power
 /sys/devices/virtual/touch/tp_dev/double_tap                       u:object_r:vendor_sysfs_double_tap:s0
 
+# Power
+/dev/xiaomi-touch                                                  u:object_r:vendor_touchfeature_device:s0
+
 # Powershare
 /vendor/bin/hw/vendor\.lineage\.powershare@1\.0-service\.xiaomi_sm8350                           u:object_r:hal_lineage_powershare_default_exec:s0
 

sepolicy/vendor/hal_power_default.te

@@ -1,3 +1,5 @@
 type vendor_sysfs_double_tap, sysfs_type, fs_type;
+type vendor_touchfeature_device, dev_type;
 
 allow hal_power_default vendor_sysfs_double_tap:file rw_file_perms;
+allow hal_power_default vendor_touchfeature_device:chr_file rw_file_perms;