RK3588-12将亮度调节从伽马曲线改调节为线性调节

需求：

        Rockchip-android11和android12系统亮度调节框调节亮度是曲线调节,需改为像低版本系统一样的线性调节效果(亮度递增效果)

解决方法：

代码路径：frameworks/base/packages/SettingsLib/src/com/android/settingslib/display/BrightnessUtils.java

--- a/packages/SettingsLib/src/com/android/settingslib/display/BrightnessUtils.java
+++ b/packages/SettingsLib/src/com/android/settingslib/display/BrightnessUtils.java
@@ -22,6 +22,7 @@ public class BrightnessUtils {
 
     public static final int GAMMA_SPACE_MIN = 0;
     public static final int GAMMA_SPACE_MAX = 65535;
+   public static final boolean ENABLE_GAMMA = false;
 
     // Hybrid Log Gamma constant values
     private static final float R = 0.5f;
@@ -75,6 +76,11 @@ public class BrightnessUtils {
      * @return The corresponding setting value.
      */
     public static final float convertGammaToLinearFloat(int val, float min, float max) {
+        if(!ENABLE_GAMMA){
+            float ratio = (float)val / GAMMA_SPACE_MAX;
+            return min + (float)(ratio * (max - min));
+        }
         final float normalizedVal = MathUtils.norm(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, val);
         final float ret;
         if (normalizedVal <= R) {
@@ -127,6 +133,11 @@ public class BrightnessUtils {
      * @return The corresponding slider value
      */
     public static final int convertLinearToGammaFloat(float val, float min, float max) {
+        if(!ENABLE_GAMMA){
+            float ratio = (float)(val - min)/ (max - min);
+            return (int)(ratio * GAMMA_SPACE_MAX);
+        }
         // For some reason, HLG normalizes to the range [0, 12] rather than [0, 1]
         final float normalizedVal = MathUtils.norm(min, max, val) * 12;
         final float ret;