Add support for detecting Keyboard backlight using sysfs node

Add new light type for Keyboard backlight and corresponding
detection logic. Also, refactor PeripheralController logic to
support Light type and light capabilities similar to how it is
handled on Java side of code.

Test: atest inputflinger_tests
Bug: 245506418
Change-Id: Ic69e42555bf57a66683fcf359169869ee2a00749

1 files changed, 15 insertions, 5 deletions

diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index 415080d15d..0026e82caa 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <android/sensor.h>
+#include <ftl/flags.h>
 #include <input/Input.h>
 #include <input/KeyCharacterMap.h>
 #include <unordered_map>
@@ -105,12 +106,18 @@ enum class InputDeviceSensorReportingMode : int32_t {
 };
 
 enum class InputDeviceLightType : int32_t {
-    MONO = 0,
+    INPUT = 0,
     PLAYER_ID = 1,
-    RGB = 2,
-    MULTI_COLOR = 3,
+    KEYBOARD_BACKLIGHT = 2,
 
-    ftl_last = MULTI_COLOR
+    ftl_last = KEYBOARD_BACKLIGHT
+};
+
+enum class InputDeviceLightCapability : uint32_t {
+    /** Capability to change brightness of the light */
+    BRIGHTNESS = 0x00000001,
+    /** Capability to change color of the light */
+    RGB = 0x00000002,
 };
 
 struct InputDeviceSensorInfo {
@@ -171,14 +178,17 @@ struct InputDeviceSensorInfo {
 
 struct InputDeviceLightInfo {
     explicit InputDeviceLightInfo(std::string name, int32_t id, InputDeviceLightType type,
+                                  ftl::Flags<InputDeviceLightCapability> capabilityFlags,
                                   int32_t ordinal)
-          : name(name), id(id), type(type), ordinal(ordinal) {}
+          : name(name), id(id), type(type), capabilityFlags(capabilityFlags), ordinal(ordinal) {}
     // Name string of the light.
     std::string name;
     // Light id
     int32_t id;
     // Type of the light.
     InputDeviceLightType type;
+    // Light capabilities.
+    ftl::Flags<InputDeviceLightCapability> capabilityFlags;
     // Ordinal of the light
     int32_t ordinal;
 };