From 70cabf3a49dc2f2fcb61e2c19475ade4b5383143 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 5 Feb 2017 16:04:02 +0100
Subject: [PATCH 1/3] UpKbdBacklight: Add new BrightnessChangedWithSource
 signal

There are multiple possible causes for the keyboard brightness to change,
e.g. SetBrightness may get called, or the brightness may get changed
through a hotkey which is handled in firmware.
---
 dbus/org.freedesktop.UPower.KbdBacklight.xml | 25 +++++++++++++++++++++++++
 src/up-kbd-backlight.c                       | 13 +++++++++++--
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/dbus/org.freedesktop.UPower.KbdBacklight.xml b/dbus/org.freedesktop.UPower.KbdBacklight.xml
index 994380f..b8e105b 100644
--- a/dbus/org.freedesktop.UPower.KbdBacklight.xml
+++ b/dbus/org.freedesktop.UPower.KbdBacklight.xml
@@ -96,6 +96,31 @@
       </doc:doc>
     </signal>
 
+    <signal name="BrightnessChangedWithSource">
+      <arg name="value" direction="out" type="i">
+        <doc:doc>
+          <doc:summary>
+            The new brightness value of the keyboard backlight.
+          </doc:summary>
+        </doc:doc>
+      </arg>
+      <arg name="source" direction="out" type="s">
+        <doc:doc>
+          <doc:summary>
+            Source of the keyboard backlight brightness change.
+          </doc:summary>
+        </doc:doc>
+      </arg>
+      <doc:doc>
+        <doc:description>
+          <doc:para>
+	    The keyboard backlight brightness level has changed including
+	    information of the source of the change.
+          </doc:para>
+        </doc:description>
+      </doc:doc>
+    </signal>
+
   </interface>
 
 </node>
diff --git a/src/up-kbd-backlight.c b/src/up-kbd-backlight.c
index 925a5ed..f693983 100644
--- a/src/up-kbd-backlight.c
+++ b/src/up-kbd-backlight.c
@@ -49,6 +49,16 @@ struct UpKbdBacklightPrivate
 G_DEFINE_TYPE (UpKbdBacklight, up_kbd_backlight, UP_TYPE_EXPORTED_KBD_BACKLIGHT_SKELETON)
 
 /**
+ * up_kbd_backlight_emit_change:
+ **/
+static void
+up_kbd_backlight_emit_change(UpKbdBacklight *kbd_backlight, int value, const char *source)
+{
+	up_exported_kbd_backlight_emit_brightness_changed (UP_EXPORTED_KBD_BACKLIGHT (kbd_backlight), value);
+	up_exported_kbd_backlight_emit_brightness_changed_with_source (UP_EXPORTED_KBD_BACKLIGHT (kbd_backlight), value, source);
+}
+
+/**
  * up_kbd_backlight_brightness_read:
  **/
 static gint
@@ -114,8 +124,7 @@ up_kbd_backlight_brightness_write (UpKbdBacklight *kbd_backlight, gint value)
 	}
 
 	/* emit signal */
-	up_exported_kbd_backlight_emit_brightness_changed (UP_EXPORTED_KBD_BACKLIGHT (kbd_backlight),
-							   value);
+	up_kbd_backlight_emit_change (kbd_backlight, value, "SetBrightness");
 
 out:
 	g_free (text);
-- 
2.9.3