From 0b368e57b42a6825ae393c10f8443bfcb0e97880 Mon Sep 17 00:00:00 2001
From: Danny Baumann <dannybaumann@web.de>
Date: Thu, 16 Aug 2018 13:39:50 +0200
Subject: [PATCH] sdm660-common: overlay: Give light sensor some time to warm
 up

When being in dark environments, turning screen off, then moving to
bright environments and turning screen on, sometimes it happens that the
light sensor emits an initial light sample of 1 lux, which causes the
automatic brightness controller to ramp down the brightness even though
the ambient brightness is high. Avoid the controller using those samples
by giving the light sensor some time to warm up.

Change-Id: I81dcb41a25ff0c9f0cf3265da7054ac7ebcbcc34
---
 overlay/frameworks/base/core/res/res/values/config.xml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index babe3bbf..398be193 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -97,6 +97,11 @@
     <!-- Period of time in which to consider light samples in milliseconds. -->
     <integer name="config_autoBrightnessAmbientLightHorizon">16000</integer>
 
+    <!-- Amount of time it takes for the light sensor to warm up in milliseconds.
+          For this time after the screen turns on, the Power Manager
+          will not debounce light sensor readings -->
+    <integer name="config_lightSensorWarmupTime">200</integer>
+
     <!-- If this is true, the screen will come on when you unplug usb/power/whatever. -->
     <bool name="config_unplugTurnsOnScreen">true</bool>