liblight: Kanged mostly from hardware/qcom/sdm845/display/liblight

Removed the LED control paths we dont yet support upstream and
updated backlight wled brightness sysfs path from downstream
"/sys/class/backlight/panel0-backlight/brightness" to upstream
"/sys/class/backlight/wled/brightness".

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/beryllium/device.mk b/beryllium/device.mk
index f4ab124..91329a2 100644
--- a/beryllium/device.mk
+++ b/beryllium/device.mk
@@ -32,6 +32,9 @@
 # Build generic Audio HAL
 PRODUCT_PACKAGES := audio.primary.beryllium
 
+# Build generic lights HAL
+PRODUCT_PACKAGES += lights.beryllium
+
 PRODUCT_PACKAGES += \
     pd-mapper \
     qrtr-ns \
diff --git a/device-common.mk b/device-common.mk
index 47baec9..2c1c707 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -162,6 +162,11 @@
 PRODUCT_HOST_PACKAGES := \
     mkbootimg
 
+# Lights
+PRODUCT_PACKAGES += \
+    android.hardware.light@2.0-impl \
+    android.hardware.light@2.0-service
+
 # Copy standard platform config files
 PRODUCT_COPY_FILES +=  \
     $(LOCAL_PATH)/ueventd.common.rc:$(TARGET_COPY_OUT_VENDOR)/ueventd.rc \
diff --git a/init.common.rc b/init.common.rc
index a8a6342..d93f96c 100644
--- a/init.common.rc
+++ b/init.common.rc
@@ -24,6 +24,8 @@
     chmod 777 /sys/kernel/debug/sync/sw_sync
     chown graphics graphics /sys/kernel/debug/sync/info
 
+    chown system system /sys/class/backlight/wled/brightness
+
 on zygote-start
     mkdir /data/vendor/wifi 0770 wifi wifi
     mkdir /data/vendor/wifi/wpa 0770 wifi wifi
diff --git a/liblight/Android.mk b/liblight/Android.mk
new file mode 100644
index 0000000..c80db3d
--- /dev/null
+++ b/liblight/Android.mk
@@ -0,0 +1,37 @@
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+LOCAL_PATH:= $(call my-dir)
+# HAL module implemenation stored in
+# hw/<COPYPIX_HARDWARE_MODULE_ID>.<ro.board.platform>.so
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := lights.c
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_HEADER_LIBRARIES := libhardware_headers
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_CFLAGS := -DLOG_TAG=\"qdlights\"
+ifeq ($(LLVM_SA), true)
+    LOCAL_CFLAGS += --compile-and-analyze --analyzer-perf --analyzer-Werror
+endif
+LOCAL_CFLAGS += -Wno-error
+LOCAL_CLANG  := true
+LOCAL_MODULE := lights.$(TARGET_BOARD_PLATFORM)
+LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0 legacy_not_a_contribution
+LOCAL_LICENSE_CONDITIONS := by_exception_only not_allowed notice
+LOCAL_NOTICE_FILE := $(LOCAL_PATH)/NOTICE
+LOCAL_MODULE_TAGS := optional
+LOCAL_VENDOR_MODULE := true
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/liblight/NOTICE b/liblight/NOTICE
new file mode 100644
index 0000000..7340b9e
--- /dev/null
+++ b/liblight/NOTICE
@@ -0,0 +1,190 @@
+
+   Copyright (c) 2008, The Android Open Source Project
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
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+      Work (including but not limited to damages for loss of goodwill,
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      defend, and hold each Contributor harmless for any liability
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+   END OF TERMS AND CONDITIONS
+
diff --git a/liblight/lights.c b/liblight/lights.c
new file mode 100644
index 0000000..abda1ff
--- /dev/null
+++ b/liblight/lights.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2014, 2017-2018 The  Linux Foundation. All rights reserved.
+ * Not a contribution
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+// #define LOG_NDEBUG 0
+
+#include <log/log.h>
+#include <cutils/properties.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#include <hardware/lights.h>
+
+#define CG_COLOR_ID_PROPERTY "ro.boot.hardware.color"
+
+/******************************************************************************/
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+static int rgb_brightness_ratio = 255;
+
+char const*const LCD_FILE
+        = "/sys/class/backlight/wled/brightness";
+
+/**
+ * device methods
+ */
+
+void init_globals(void)
+{
+    char color_id_prop[PROPERTY_VALUE_MAX] = {""};
+
+    // init the mutex
+    pthread_mutex_init(&g_lock, NULL);
+
+    // check CG color
+    property_get(CG_COLOR_ID_PROPERTY, color_id_prop, "DEF00");
+    if (strcmp(color_id_prop, "GRA00") == 0) {
+        rgb_brightness_ratio = 25;
+    } else if (strcmp(color_id_prop, "SLV00") == 0) {
+        rgb_brightness_ratio = 15;
+    } else if (strcmp(color_id_prop, "BLU00") == 0) {
+        rgb_brightness_ratio = 15;
+    } else {
+        rgb_brightness_ratio = 20;
+    }
+}
+
+static int
+write_int(char const* path, int value)
+{
+    int fd;
+    static int already_warned = 0;
+
+    fd = open(path, O_WRONLY);
+    if (fd >= 0) {
+        char buffer[20];
+        ssize_t amt;
+        size_t bytes = snprintf(buffer, sizeof(buffer), "%d\n", value);
+        if(bytes < sizeof(buffer)) {
+            amt = write(fd, buffer, bytes);
+        } else {
+            amt = -1;
+            errno = -EINVAL;
+        }
+        close(fd);
+        return amt == -1 ? -errno : 0;
+    } else {
+        if (already_warned == 0) {
+            ALOGE("write_int failed to open %s\n", path);
+            already_warned = 1;
+        }
+        return -errno;
+    }
+}
+
+static int
+rgb_to_brightness(struct light_state_t const* state)
+{
+    int color = state->color & 0x00ffffff;
+    return ((77*((color>>16)&0x00ff))
+            + (150*((color>>8)&0x00ff)) + (29*(color&0x00ff))) >> 8;
+}
+
+static int
+set_light_backlight(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    if(!dev) {
+        return -1;
+    }
+
+    int brightness = rgb_to_brightness(state) << 4; // Scale up to 4095
+    write_int(LCD_FILE, brightness);
+
+    return 0;
+}
+
+/** Close the lights device */
+static int
+close_lights(struct light_device_t *dev)
+{
+    if (dev) {
+        free(dev);
+    }
+    return 0;
+}
+
+
+/******************************************************************************/
+
+/**
+ * module methods
+ */
+
+/** Open a new instance of a lights device using name */
+static int open_lights(const struct hw_module_t* module, char const* name,
+        struct hw_device_t** device)
+{
+    pthread_once(&g_init, init_globals);
+
+    struct light_device_t *dev = malloc(sizeof(struct light_device_t));
+
+    if(!dev)
+        return -ENOMEM;
+
+    memset(dev, 0, sizeof(*dev));
+
+    dev->common.tag = HARDWARE_DEVICE_TAG;
+    dev->common.version = LIGHTS_DEVICE_API_VERSION_2_0;
+    dev->common.module = (struct hw_module_t*)module;
+    dev->common.close = (int (*)(struct hw_device_t*))close_lights;
+    dev->set_light = set_light_backlight;
+
+    *device = (struct hw_device_t*)dev;
+    return 0;
+}
+
+static struct hw_module_methods_t lights_module_methods = {
+    .open =  open_lights,
+};
+
+/*
+ * The lights Module
+ */
+struct hw_module_t HAL_MODULE_INFO_SYM = {
+    .tag = HARDWARE_MODULE_TAG,
+    .version_major = 1,
+    .version_minor = 0,
+    .id = LIGHTS_HARDWARE_MODULE_ID,
+    .name = "lights Module",
+    .author = "Google, Inc.",
+    .methods = &lights_module_methods,
+};
diff --git a/manifest.xml b/manifest.xml
index 2034741..be1b23a 100644
--- a/manifest.xml
+++ b/manifest.xml
@@ -103,6 +103,15 @@
         </interface>
     </hal>
     <hal format="hidl">
+        <name>android.hardware.light</name>
+        <transport>hwbinder</transport>
+        <version>2.0</version>
+        <interface>
+            <name>ILight</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+    <hal format="hidl">
         <name>android.hardware.media.omx</name>
         <transport>hwbinder</transport>
         <version>1.0</version>
diff --git a/sepolicy/file.te b/sepolicy/file.te
index 4a0ada7..f259ca3 100644
--- a/sepolicy/file.te
+++ b/sepolicy/file.te
@@ -1,4 +1,5 @@
 type sysfs_gpu, fs_type, sysfs_type;
+type sysfs_lights, fs_type, sysfs_type;
 type sysfs_mss, fs_type, sysfs_type;
 type sysfs_rmtfs, fs_type, sysfs_type;
 type sysfs_remoteproc, fs_type, sysfs_type;
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index bee4eac..6636cc0 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -27,6 +27,7 @@
 /system/bin/tinymix									u:object_r:tinymix_exec:s0
 
 /vendor/bin/hw/android\.hardware\.gatekeeper@1\.0-service\.software			u:object_r:hal_gatekeeper_default_exec:s0
+/vendor/bin/hw/android\.hardware\.light@2\.0-service					u:object_r:hal_light_default_exec:s0
 /vendor/bin/pd-mapper									u:object_r:pd_mapper_exec:s0
 /vendor/bin/qrtr-cfg									u:object_r:qrtr_exec:s0
 /vendor/bin/qrtr-ns									u:object_r:qrtr_exec:s0
diff --git a/sepolicy/genfs_contexts b/sepolicy/genfs_contexts
index f3799ed..90ca07a 100644
--- a/sepolicy/genfs_contexts
+++ b/sepolicy/genfs_contexts
@@ -4,3 +4,4 @@
 genfscon sysfs   /devices/platform/soc@0/4080000.remoteproc					u:object_r:sysfs_remoteproc:s0
 genfscon sysfs   /devices/platform/soc@0/ae00000.mdss						u:object_r:sysfs_gpu:s0
 genfscon sysfs   /devices/platform/soc@0/c440000.spmi/spmi-0/0-00/c440000.spmi:pmic@0:rtc@6000	u:object_r:sysfs_rtc:s0
+genfscon sysfs   /devices/platform/soc@0/c440000.spmi/spmi-0/0-03/c440000.spmi:pmic@3:wled@d800/backlight/wled/ u:object_r:sysfs_lights:s0
diff --git a/sepolicy/hal_light_default.te b/sepolicy/hal_light_default.te
new file mode 100644
index 0000000..04eaaa6
--- /dev/null
+++ b/sepolicy/hal_light_default.te
@@ -0,0 +1,2 @@
+# audit2allow
+allow hal_light_default sysfs_lights:file { open write };