From 8cf1d5dda3afebab794b863cc3e7afcbdf085bbd Mon Sep 17 00:00:00 2001
From: Arian <arian.kulmer@web.de>
Date: Fri, 25 Jun 2021 19:18:08 +0200
Subject: [PATCH] sm6150-common: power: Use xiaomi-touch to handle dt2w

Change-Id: I73f95e32daf9e2c702662ac2c2c8182e6b8eb214
---
 power/power-mode.cpp                 | 57 +++++-----------------------
 sepolicy/vendor/hal_power_default.te |  3 +-
 2 files changed, 11 insertions(+), 49 deletions(-)

diff --git a/power/power-mode.cpp b/power/power-mode.cpp
index ed93ef9..1886dc3 100644
--- a/power/power-mode.cpp
+++ b/power/power-mode.cpp
@@ -17,42 +17,16 @@
 #include <aidl/android/hardware/power/BnPower.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
-#include <linux/input.h>
+#include <sys/ioctl.h>
 
-namespace {
-int open_ts_input() {
-    int fd = -1;
-    DIR *dir = opendir("/dev/input");
+// defines from drivers/input/touchscreen/xiaomi/xiaomi_touch.h
+#define SET_CUR_VALUE 0
+#define Touch_Doubletap_Mode 14
 
-    if (dir != NULL) {
-        struct dirent *ent;
+#define TOUCH_DEV_PATH "/dev/xiaomi-touch"
 
-        while ((ent = readdir(dir)) != NULL) {
-            if (ent->d_type == DT_CHR) {
-                char absolute_path[PATH_MAX] = {0};
-                char name[80] = {0};
-
-                strcpy(absolute_path, "/dev/input/");
-                strcat(absolute_path, ent->d_name);
-
-                fd = open(absolute_path, O_RDWR);
-                if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) > 0) {
-                    if (strcmp(name, "fts") == 0 || strcmp(name, "goodix_ts") == 0 ||
-                            strcmp(name, "NVTCapacitiveTouchScreen") == 0)
-                        break;
-                }
-
-                close(fd);
-                fd = -1;
-            }
-        }
-
-        closedir(dir);
-    }
-
-    return fd;
-}
-}  // anonymous namespace
+#define TOUCH_MAGIC 0x5400
+#define TOUCH_IOC_SETMODE TOUCH_MAGIC + SET_CUR_VALUE
 
 namespace aidl {
 namespace google {
@@ -61,9 +35,6 @@ namespace power {
 namespace impl {
 namespace pixel {
 
-static constexpr int kInputEventWakeupModeOff = 4;
-static constexpr int kInputEventWakeupModeOn = 5;
-
 using ::aidl::android::hardware::power::Mode;
 
 bool isDeviceSpecificModeSupported(Mode type, bool* _aidl_return) {
@@ -79,17 +50,9 @@ bool isDeviceSpecificModeSupported(Mode type, bool* _aidl_return) {
 bool setDeviceSpecificMode(Mode type, bool enabled) {
     switch (type) {
         case Mode::DOUBLE_TAP_TO_WAKE: {
-            int fd = open_ts_input();
-            if (fd == -1) {
-                LOG(WARNING)
-                    << "DT2W won't work because no supported touchscreen input devices were found";
-                return false;
-            }
-            struct input_event ev;
-            ev.type = EV_SYN;
-            ev.code = SYN_CONFIG;
-            ev.value = enabled ? kInputEventWakeupModeOn : kInputEventWakeupModeOff;
-            write(fd, &ev, sizeof(ev));
+            int fd = open(TOUCH_DEV_PATH, O_RDWR);
+            int arg[2] = {Touch_Doubletap_Mode, enabled ? 1 : 0};
+            ioctl(fd, TOUCH_IOC_SETMODE, &arg);
             close(fd);
             return true;
         }
diff --git a/sepolicy/vendor/hal_power_default.te b/sepolicy/vendor/hal_power_default.te
index 8f7f52b..353cec2 100644
--- a/sepolicy/vendor/hal_power_default.te
+++ b/sepolicy/vendor/hal_power_default.te
@@ -1,8 +1,7 @@
 type proc_sched_energy_aware, proc_type, fs_type;
 type vendor_power_prop, property_type;
 
-allow hal_power_default input_device:dir r_dir_perms;
-allow hal_power_default input_device:chr_file rw_file_perms;
+allow hal_power_default touchfeature_device:chr_file rw_file_perms;
 
 # To do powerhint on nodes defined in powerhint.json
 allow hal_power_default cgroup:dir search;