phoenix: Add dt2w support

Signed-off-by: Akhil Narang <me@akhilnarang.dev>

BoardConfig.mk

@@ -154,6 +154,9 @@ TARGET_RELEASETOOLS_EXTENSIONS := $(DEVICE_PATH)
 # Telephony
 TARGET_PROVIDES_QTI_TELEPHONY_JAR := true
 
+# Power
+TARGET_TAP_TO_WAKE_NODE := "/dev/input/event3"
+
 # Treble
 BOARD_VNDK_VERSION := current
 

overlay/frameworks/base/core/res/res/values/config.xml

@@ -646,4 +646,6 @@
         <item>13</item>
     </integer-array>
 
-</resources>
+    <!-- Whether device supports double tap to wake -->
+    <bool name="config_supportDoubleTapWake">true</bool>
+</resources>

power/Android.mk

@@ -19,11 +19,13 @@ LOCAL_SRC_FILES := power-common.c metadata-parser.c utils.c list.c hint-data.c p
 LOCAL_C_INCLUDES := external/libxml2/include \
                     external/icu/icu4c/source/common
 
-# Include target-specific files.
+ifneq ($(TARGET_TAP_TO_WAKE_NODE),)
+    LOCAL_CFLAGS += -DTAP_TO_WAKE_NODE=\"$(TARGET_TAP_TO_WAKE_NODE)\"
+endif
+
 ifeq ($(TARGET_USES_INTERACTION_BOOST),true)
     LOCAL_CFLAGS += -DINTERACTION_BOOST
 endif
-
 include $(BUILD_EXECUTABLE)
 
 include $(CLEAR_VARS)

power/Power.cpp

@@ -30,6 +30,7 @@
 #define LOG_TAG "QTI PowerHAL"
 
 #include <android/log.h>
+#include <linux/input.h>
 #include <utils/Log.h>
 #include "Power.h"
 #include "power-common.h"
@@ -64,7 +65,26 @@ Return<void> Power::powerHint(PowerHint_1_0 hint, int32_t data) {
     return Void();
 }
 
+void set_feature(feature_t feature, int state) {
+    switch (feature) {
+#ifdef TAP_TO_WAKE_NODE
+        case POWER_FEATURE_DOUBLE_TAP_TO_WAKE: {
+            int fd = open(TAP_TO_WAKE_NODE, O_RDWR);
+            struct input_event ev;
+            ev.type = EV_SYN;
+            ev.code = SYN_CONFIG;
+            ev.value = state ? INPUT_EVENT_WAKUP_MODE_ON : INPUT_EVENT_WAKUP_MODE_OFF;
+            write(fd, &ev, sizeof(ev));
+            close(fd);
+        } break;
+#endif
+        default:
+            break;
+    }
+}
+
 Return<void> Power::setFeature(Feature feature, bool activate)  {
+    set_feature(static_cast<feature_t>(feature), activate ? 1 : 0);
     return Void();
 }
 

power/android.hardware.power@1.2-service.rc

@@ -1,4 +1,4 @@
 service vendor.power-hal-1-2 /vendor/bin/hw/android.hardware.power@1.2-service
     class hal
     user system
-    group system
+    group system input

power/power-common.h

@@ -46,6 +46,9 @@ extern "C" {
 #define MSMDCVS_GOVERNOR "msm-dcvs"
 #define SCHEDUTIL_GOVERNOR "schedutil"
 
+#define INPUT_EVENT_WAKUP_MODE_OFF 4
+#define INPUT_EVENT_WAKUP_MODE_ON 5
+
 #define HINT_HANDLED (0)
 #define HINT_NONE (-1)
 

sepolicy/private/hal_power.te

@@ -0,0 +1,2 @@
+allow hal_power input_device:dir search;
+allow hal_power input_device:chr_file rw_file_perms;