From a587e4ebb8e87c3eb5e41e9eafcca0511d4b76b6 Mon Sep 17 00:00:00 2001
From: Bruno Martins <bgcngm@gmail.com>
Date: Fri, 31 Jan 2020 23:10:19 +0000
Subject: [PATCH] sm6250-common: power: Add support for DT2W feature
Co-authored-by: LuK1337 <priv.luk@gmail.com>
Co-authored-by: AbhiShek Aggarwal <warabhishek@gmail.com>
Change-Id: I2f7fb4a8b0c9cd1a16d6c2b93602d285a191f170
---
power/Android.bp | 3 +
power/Power.cpp | 67 ++++++++++++++++++-
...ardware.power@1.3-service.xiaomi_sm6250.rc | 2 +-
sepolicy/vendor/hal_power_default.te | 3 +
4 files changed, 73 insertions(+), 2 deletions(-)
create mode 100644 sepolicy/vendor/hal_power_default.te
diff --git a/power/Android.bp b/power/Android.bp
index 6beabdc..c268446 100644
--- a/power/Android.bp
+++ b/power/Android.bp
@@ -22,6 +22,9 @@ cc_binary {
"Power.cpp",
"service.cpp",
],
+ header_libs: [
+ "generated_kernel_headers",
+ ],
shared_libs: [
"liblog",
"libhidlbase",
diff --git a/power/Power.cpp b/power/Power.cpp
index 134228d..8812cb3 100644
--- a/power/Power.cpp
+++ b/power/Power.cpp
@@ -16,8 +16,14 @@
#define LOG_TAG "android.hardware.power@1.3-service.xiaomi_sm6250"
+#include <linux/input.h>
+
#include "Power.h"
+constexpr static char const* inputDevicesDirectory = "/dev/input/";
+constexpr static int wakeupModeOn = 5;
+constexpr static int wakeupModeOff = 4;
+
namespace android {
namespace hardware {
namespace power {
@@ -33,7 +39,66 @@ Return<void> Power::powerHint(PowerHint_1_0, int32_t) {
return Void();
}
-Return<void> Power::setFeature(Feature, bool) {
+bool isSupportedInputName(char* name) {
+ return false;
+}
+
+int openInputFd() {
+ DIR *dir = opendir(inputDevicesDirectory);
+ if (dir == NULL) {
+ return -1;
+ }
+
+ struct dirent *ent;
+ int fd;
+ int rc;
+
+ while ((ent = readdir(dir)) != NULL) {
+ if (ent->d_type != DT_CHR)
+ continue;
+
+ char absolute_path[PATH_MAX] = {0};
+ char name[80] = {0};
+
+ strcpy(absolute_path, inputDevicesDirectory);
+ strcat(absolute_path, ent->d_name);
+
+ fd = open(absolute_path, O_RDWR);
+ if (fd < 0)
+ continue;
+
+ rc = ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name);
+ if (rc > 0 && isSupportedInputName(name))
+ break;
+
+ close(fd);
+ fd = -1;
+ }
+
+ closedir(dir);
+
+ return fd;
+}
+
+Return<void> Power::setFeature(Feature feature, bool activate) {
+ switch (feature) {
+ case Feature::POWER_FEATURE_DOUBLE_TAP_TO_WAKE: {
+ int fd = openInputFd();
+ if (fd < 0) {
+ ALOGW("No touchscreen input devices that support DT2W were found");
+ return Void();
+ }
+
+ struct input_event ev;
+ ev.type = EV_SYN;
+ ev.code = SYN_CONFIG;
+ ev.value = activate ? wakeupModeOn : wakeupModeOff;
+ write(fd, &ev, sizeof(ev));
+ close(fd);
+ } break;
+ default:
+ break;
+ }
return Void();
}
diff --git a/power/android.hardware.power@1.3-service.xiaomi_sm6250.rc b/power/android.hardware.power@1.3-service.xiaomi_sm6250.rc
index 0e67dde..4c63209 100644
--- a/power/android.hardware.power@1.3-service.xiaomi_sm6250.rc
+++ b/power/android.hardware.power@1.3-service.xiaomi_sm6250.rc
@@ -1,4 +1,4 @@
service vendor.power-hal-1-0 /vendor/bin/hw/android.hardware.power@1.3-service.xiaomi_sm6250
class hal
user system
- group system
+ group system input
diff --git a/sepolicy/vendor/hal_power_default.te b/sepolicy/vendor/hal_power_default.te
new file mode 100644
index 0000000..c2eac2f
--- /dev/null
+++ b/sepolicy/vendor/hal_power_default.te
@@ -0,0 +1,3 @@
+# Allow hal_power_default to write to dt2w nodes
+allow hal_power_default input_device:dir r_dir_perms;
+allow hal_power_default input_device:chr_file rw_file_perms;
--
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