From fa9709b09aff36a3d0755af56bc445d43e90c617 Mon Sep 17 00:00:00 2001
From: Michael Wright <michaelwr@google.com>
Date: Wed, 16 Aug 2017 21:59:07 +0100
Subject: [PATCH] Make brightness ramp rates multiples of 60.

If ramp rates aren't even multiple of 60 then we're more likely to get
brightness changes that differ each frame, which can show up as a
stuttering in the animation.

Bug: 64514692
Test: made change, took systrace, saw smooth ramping
Change-Id: I48ec832f752a8aefb6185c1583141f2fb1a29e85
---
 overlay/frameworks/base/core/res/res/values/config.xml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 779bd7ad..92eda687 100755
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -54,6 +54,12 @@
     <integer name="config_autoBrightnessBrighteningLightDebounce">2000</integer>
     <integer name="config_autoBrightnessDarkeningLightDebounce">4000</integer>
 
+    <!-- Fast brightness animation ramp rate in brightness units per second-->
+    <integer translatable="false" name="config_brightness_ramp_rate_fast">180</integer>
+
+    <!-- Slow brightness animation ramp rate in brightness units per second-->
+    <integer translatable="false" name="config_brightness_ramp_rate_slow">60</integer>
+
     <!-- If this is true, the screen will come on when you unplug usb/power/whatever. -->
     <bool name="config_unplugTurnsOnScreen">true</bool>