commit 586c6d5f9af3177e4af73d3663e2cd7b3eadcf5a
author Xu Yang <yangxu@codeaurora.org> Mon Sep 19 17:54:16 2016 +0800
committer Gerrit - the friendly Code Review server <code-review@localhost> Tue Mar 14 01:57:54 2017 -0700
tree a871cc0459677db31b629286ca4e84d3ea4f9671
parent c31d7f8d94d0caf226b0ee246400b435a4fa7cec

liblight: Add brightness level extension support

Add brightness level extension API to set backlight
through display API. The feature is enabled by property.

Change-Id: Ia6911433705cc946ed73ffc820396c350e3c8b88

liblight/lights.c

diff --git a/liblight/lights.c b/liblight/lights.c
index 89c27cd..d63cc67 100644
--- a/liblight/lights.c
+++ b/liblight/lights.c
@@ -20,7 +20,7 @@
 // #define LOG_NDEBUG 0
 
 #include <cutils/log.h>
-
+#include <cutils/properties.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
@@ -33,6 +33,7 @@
 #include <sys/types.h>
 
 #include <hardware/lights.h>
+#include "lights_prv.h"
 
 #ifndef DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS
 #define DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS 0x80
@@ -46,6 +47,7 @@
 static struct light_state_t g_battery;
 static int g_last_backlight_mode = BRIGHTNESS_MODE_USER;
 static int g_attention = 0;
+static int g_brightness_max = 0;
 
 char const*const RED_LED_FILE
         = "/sys/class/leds/red/brightness";
@@ -157,6 +159,28 @@
 }
 
 static int
+set_light_backlight_ext(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    int err = 0;
+
+    if(!dev) {
+        return -1;
+    }
+
+    int brightness = state->color & 0x00ffffff;
+    pthread_mutex_lock(&g_lock);
+
+    if (brightness >= 0 && brightness <= g_brightness_max) {
+        set_brightness_ext_level(brightness);
+    }
+
+    pthread_mutex_unlock(&g_lock);
+
+    return err;
+}
+
+static int
 set_speaker_light_locked(struct light_device_t* dev,
         struct light_state_t const* state)
 {
@@ -211,15 +235,15 @@
         if (red) {
             if (write_int(RED_BLINK_FILE, blink))
                 write_int(RED_LED_FILE, 0);
-	}
+    }
         if (green) {
             if (write_int(GREEN_BLINK_FILE, blink))
                 write_int(GREEN_LED_FILE, 0);
-	}
+    }
         if (blue) {
             if (write_int(BLUE_BLINK_FILE, blink))
                 write_int(BLUE_LED_FILE, 0);
-	}
+    }
     } else {
         write_int(RED_LED_FILE, red);
         write_int(GREEN_LED_FILE, green);
@@ -314,9 +338,19 @@
     int (*set_light)(struct light_device_t* dev,
             struct light_state_t const* state);
 
-    if (0 == strcmp(LIGHT_ID_BACKLIGHT, name))
-        set_light = set_light_backlight;
-    else if (0 == strcmp(LIGHT_ID_BATTERY, name))
+    if (0 == strcmp(LIGHT_ID_BACKLIGHT, name)) {
+        char property[PROPERTY_VALUE_MAX];
+        property_get("persist.extend.brightness", property, "0");
+
+        if(!(strncmp(property, "1", PROPERTY_VALUE_MAX)) ||
+           !(strncmp(property, "true", PROPERTY_VALUE_MAX))) {
+            property_get("persist.display.max_brightness", property, "255");
+            g_brightness_max = atoi(property);
+            set_brightness_ext_init();
+            set_light = set_light_backlight_ext;
+        } else
+            set_light = set_light_backlight;
+    } else if (0 == strcmp(LIGHT_ID_BATTERY, name))
         set_light = set_light_battery;
     else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
         set_light = set_light_notifications;