From 13517dc3cb92a8cf9314f8ccfa81125841e7d17d Mon Sep 17 00:00:00 2001
From: TheScarastic <warabhishek@gmail.com>
Date: Sat, 3 Nov 2018 05:30:06 -0400
Subject: [PATCH] sdm660-common: Kang brightness overlays from marlin

* Xiaomi values are unusable
Change-Id: I3b3fb2d389eebad6c7ef76ae78e16eeff06fe3ed
---
 .../base/core/res/res/values/config.xml       | 142 +++++++++++++-----
 1 file changed, 103 insertions(+), 39 deletions(-)

diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 95c3d645..152b65f7 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -22,53 +22,117 @@
     <bool name="config_automatic_brightness_available">true</bool>
 
     <!-- Array of light sensor LUX values to define our levels for auto backlight brightness support.
-         The N entries of this array define N + 1 control points as follows:
-         (1-based arrays)
-         Point 1: (0, value[1]): lux <= 0
-         Point 2: (level[1], value[2]): 0 < lux <= level[1]
-         Point 3: (level[2], value[3]): level[2] < lux <= level[3]
+         The N entries of this array define N  1 zones as follows:
+         Zone 0:        0 <= LUX < array[0]
+         Zone 1:        array[0] <= LUX < array[1]
          ...
-         Point N+1: (level[N], value[N+1]): level[N] < lux
-         The control points must be strictly increasing.  Each control point
-         corresponds to an entry in the brightness backlight values arrays.
-         For example, if LUX == level[1] (first element of the levels array)
-         then the brightness will be determined by value[2] (second element
-         of the brightness values array).
-         Spline interpolation is used to determine the auto-brightness
-         backlight values for LUX levels between these control points.
+         Zone N:        array[N - 1] <= LUX < array[N]
+         Zone N + 1     array[N] <= LUX < infinity
          Must be overridden in platform specific overlays -->
     <integer-array name="config_autoBrightnessLevels">
-        <item>1</item> <!-- pitch black -->
-        <item>5</item> <!-- dark indoor -->
-        <item>10</item> <!-- twilight -->
-        <item>50</item> <!-- dim indoor -->
-        <item>100</item> <!-- home -->
-        <item>300</item> <!-- office -->
-        <item>500</item> <!-- sunrise -->
-        <item>1000</item> <!-- overcast -->
-        <item>3000</item> <!-- indirect sun -->
-        <item>10000</item> <!-- daylight -->
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+        <item>4</item>
+        <item>8</item>
+        <item>12</item>
+        <item>20</item>
+        <item>33</item>
+        <item>55</item>
+        <item>90</item>
+        <item>148</item>
+        <item>245</item>
+        <item>403</item>
+        <item>665</item>
+        <item>1097</item>
+        <item>1808</item>
+        <item>2981</item>
+        <item>5000</item>
     </integer-array>
 
-    <!-- Array of output values for LCD backlight corresponding to the LUX values
-         in the config_autoBrightnessLevels array.  This array should have size one greater
-         than the size of the config_autoBrightnessLevels array.
-         The brightness values must be between 0 and 255 and be non-decreasing.
-         This must be overridden in platform specific overlays -->
-    <integer-array name="config_autoBrightnessLcdBacklightValues">
-        <item>16</item>
-        <item>20</item>
-        <item>24</item>
-        <item>31</item>
-        <item>48</item>
-        <item>74</item>
-        <item>107</item>
-        <item>152</item>
-        <item>194</item>
-        <item>254</item>
+    <!-- Array of desired screen brightness in nits corresponding to the lux values
+         in the config_autoBrightnessLevels array. As with config_screenBrightnessMinimumNits and
+         config_screenBrightnessMaximumNits, the display brightness is defined as the measured
+         brightness of an all-white image.
+         If this is defined then:
+            - config_autoBrightnessLcdBacklightValues should not be defined
+            - config_screenBrightnessNits must be defined
+            - config_screenBrightnessBacklight must be defined
+         This array should have size one greater than the size of the config_autoBrightnessLevels
+         array. The brightness values must be non-negative and non-decreasing. This must be
+         overridden in platform specific overlays -->
+    <array name="config_autoBrightnessDisplayValuesNits">
+        <item>10.45935</item>   <!-- 0-1 -->
+        <item>29.25559</item>   <!-- 1-2 -->
+        <item>34.240692</item>  <!-- 2-3 -->
+        <item>37.514347</item>  <!-- 3-4 -->
+        <item>40.018696</item>  <!-- 4-8 -->
+        <item>46.885098</item>  <!-- 8-12 -->
+        <item>51.626434</item>  <!-- 12-20 -->
+        <item>58.610405</item>  <!-- 20-33 -->
+        <item>66.890915</item>  <!-- 33-55 -->
+        <item>77.61644</item>   <!-- 55-90 -->
+        <item>90.221886</item>  <!-- 90-148 -->
+        <item>105.80314</item>  <!-- 148-245 -->
+        <item>126.073845</item> <!-- 245-403 -->
+        <item>154.16931</item>  <!-- 403-665 -->
+        <item>191.83717</item>  <!-- 665-1097 -->
+        <item>240.74442</item>  <!-- 1097-1808 -->
+        <item>294.84857</item>  <!-- 1808-2981 -->
+        <item>348.05453</item>  <!-- 2981-5000 -->
+        <item>389.70</item>     <!-- 5000+ -->
+    </array>
+
+    <!-- An array describing the screen's backlight values corresponding to the brightness
+         values in the config_screenBrightnessNits array.
+         This array should be equal in size to config_screenBrightnessBacklight. -->
+    <integer-array name="config_screenBrightnessBacklight">
+        <item>1</item>
+        <item>15</item>
+        <item>30</item>
+        <item>45</item>
+        <item>60</item>
+        <item>75</item>
+        <item>90</item>
+        <item>105</item>
+        <item>120</item>
+        <item>135</item>
+        <item>150</item>
+        <item>165</item>
+        <item>180</item>
+        <item>195</item>
+        <item>210</item>
+        <item>225</item>
+        <item>240</item>
         <item>255</item>
     </integer-array>
 
+    <!-- An array of floats describing the screen brightness in nits corresponding to the backlight
+         values in the config_screenBrightnessBacklight array.  On OLED displays these  values
+         should be measured with an all white image while the display is in the fully on state.
+         Note that this value should *not* reflect the maximum brightness value for any high
+         brightness modes but only the maximum brightness value obtainable in a sustainable manner.
+         This array should be equal in size to config_screenBrightnessBacklight -->
+    <array name="config_screenBrightnessNits">
+        <item>10.46</item>
+        <item>26.11</item>
+        <item>50.5</item>
+        <item>74.17</item>
+        <item>96.89</item>
+        <item>118.3</item>
+        <item>139.8</item>
+        <item>162.9</item>
+        <item>189.8</item>
+        <item>217.4</item>
+        <item>240.4</item>
+        <item>265.3</item>
+        <item>288.7</item>
+        <item>316</item>
+        <item>340.8</item>
+        <item>357.9</item>
+        <item>376.2</item>
+        <item>392.9</item>
+    </array>
     <!-- Screen brightness used to dim the screen when the user activity
          timeout expires.  May be less than the minimum allowed brightness setting
          that can be set by the user. -->