From d06a7361f4aebdde35db56318a7836c367a705ac Mon Sep 17 00:00:00 2001
From: Pig <pig.priv@gmail.com>
Date: Thu, 17 Dec 2020 15:04:59 +0300
Subject: [PATCH] light: Remove backlight support in favour of hwcomposer

Signed-off-by: DennySPb <dennyspb@gmail.com>
Change-Id: Ia05d24423bb80bb5df6a5352ea68bd8e971d5b32
---
 light/Light.cpp | 20 --------------------
 light/Light.h   |  1 -
 2 files changed, 21 deletions(-)

diff --git a/light/Light.cpp b/light/Light.cpp
index d914e55..366dc68 100644
--- a/light/Light.cpp
+++ b/light/Light.cpp
@@ -48,32 +48,12 @@ static T get(const std::string& path, const T& def) {
     return file.fail() ? def : result;
 }
 
-static int rgbToBrightness(const LightState& state) {
-    int color = state.color & 0x00ffffff;
-    return ((77 * ((color >> 16) & 0x00ff))
-            + (150 * ((color >> 8) & 0x00ff))
-            + (29 * (color & 0x00ff))) >> 8;
-}
-
 Light::Light() {
     mLights.emplace(Type::ATTENTION, std::bind(&Light::handleRgb, this, std::placeholders::_1, 0));
-    mLights.emplace(Type::BACKLIGHT, std::bind(&Light::handleBacklight, this, std::placeholders::_1));
     mLights.emplace(Type::BATTERY, std::bind(&Light::handleRgb, this, std::placeholders::_1, 2));
     mLights.emplace(Type::NOTIFICATIONS, std::bind(&Light::handleRgb, this, std::placeholders::_1, 1));
 }
 
-void Light::handleBacklight(const LightState& state) {
-    int maxBrightness = get("/sys/class/backlight/panel0-backlight/max_brightness", -1);
-    if (maxBrightness < 0) {
-        maxBrightness = 255;
-    }
-    int sentBrightness = rgbToBrightness(state);
-    int brightness = sentBrightness * maxBrightness / 255;
-    LOG(DEBUG) << "Writing backlight brightness " << brightness
-               << " (orig " << sentBrightness << ")";
-    set("/sys/class/backlight/panel0-backlight/brightness", brightness);
-}
-
 void Light::handleRgb(const LightState& state, size_t index) {
     mLightStates.at(index) = state;
 
diff --git a/light/Light.h b/light/Light.h
index 27a701a..bf8e59e 100644
--- a/light/Light.h
+++ b/light/Light.h
@@ -44,7 +44,6 @@ class Light : public ILight {
     Return<void> getSupportedTypes(getSupportedTypes_cb _hidl_cb) override;
 
   private:
-    void handleBacklight(const LightState& state);
     void handleRgb(const LightState& state, size_t index);
 
     std::mutex mLock;