红外遥控器支持

VIM4板子默认没有红外接收头，如果需要有红外遥控器支持的话，硬件上需要从40PIN排针扩展输出，另外软件上需要配置。

硬件连接

IR_IN(红外接收信号)是40PIN排针上的39管脚 GPIOD_15：

软件配置

  1. 在common/arch/arm64/boot/dts/amlogic/meson-ir-map.dtsi文件中增加遥控器配置：
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--- a/arch/arm64/boot/dts/amlogic/meson-ir-map.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-ir-map.dtsi
@@ -6,11 +6,12 @@
 / {
 
        custom_maps: custom_maps {
-               mapnum = <4>;
+               mapnum = <5>;
                map0 = <&map_0>;
                map1 = <&map_1>;
                map2 = <&map_2>;
                map3 = <&map_3>;
+               map4 = <&map_4>;
                map_0: map_0{
                        mapname = "amlogic-remote-1";
                        customcode = <0xfb04>;
@@ -199,5 +200,27 @@
                                REMOTE_KEY(0x49, KEY_YELLOW)
                                REMOTE_KEY(0x4C, KEY_BLUE)>;
                };
+               map_4: map_4{
+                       mapname = "amlogic-remote-khadas";
+                       customcode = <0xff00>;
+                       release_delay = <80>;
+                       vendor = <0x0003>;
+                       product = <0x0003>;
+                       version = <0x0300>;
+                       size  = <13>;
+                       keymap = <REMOTE_KEY(0x14,KEY_POWER)
+                               REMOTE_KEY(0x13,KEY_MENU)
+                               REMOTE_KEY(0x03,KEY_UP)
+                               REMOTE_KEY(0x02,KEY_DOWN)
+                               REMOTE_KEY(0x0e,KEY_LEFT)
+                               REMOTE_KEY(0x1a,KEY_RIGHT)
+                               REMOTE_KEY(0x07,KEY_ENTER)
+                               REMOTE_KEY(0x58,KEY_VOLUMEDOWN)
+                               REMOTE_KEY(0x5c,KEY_F5)
+                               REMOTE_KEY(0x5b,KEY_F5)
+                               REMOTE_KEY(0x0b,KEY_VOLUMEUP)
+                               REMOTE_KEY(0x01,KEY_BACK)
+                               REMOTE_KEY(0x48,KEY_HOME)>;
+               };
        };
 };
  1. 增加Android Key Layout(kl)文件：

  • kl文件的ID号需要和dtsi文件配置的ID号保持一致, 如前面步骤增加的ID号（as vendor=0x0003, product=0x0003）

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    +                       vendor = <0x0003>;
    +                       product = <0x0003>;

  • 新增Key Layout(kl)文件：device/khadas/common/keyboards/Vendor_xxxx_Product_xxxx.kl (as Vendor_0003_Product_0003.kl)

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    $ vim device/khadas/kVIM4/files/Vendor_0003_Product_0003.kl
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    key 116   POWER
    key 139   MENU
    key 103   DPAD_UP
    key 108   DPAD_DOWN
    key 105   DPAD_LEFT
    key 106   DPAD_RIGHT
    key 232   DPAD_CENTER
    key 114   VOLUME_DOWN
    key 63  　F5
    key 115   VOLUME_UP
    key 158   BACK
    key 102   HOME

  • 查看是否匹配成功

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    kvim4:/ # dumpsys input
    INPUT MANAGER (dumpsys input)

    Input Manager State:
      Interactive: true
      System UI Visibility: 0x8708
      Pointer Speed: 0
      Pointer Gestures Enabled: true
      Show Touches: false
      Pointer Capture Enabled: false
    ......
        8: ir_keypad
          Classes: 0x00000029
          Path: /dev/input/event6
          Enabled: true
          Descriptor: a6893ab22828f3b8b792fe40bc0d6df2b2725f26
          Location: keypad/input0
          ControllerNumber: 0
          UniqueId:
          Identifier: bus=0x0010, vendor=0x0003, product=0x0003, version=0x0300
          KeyLayoutFile: /vendor/usr/keylayout/Vendor_0003_Product_0003.kl
          KeyCharacterMapFile: /system/usr/keychars/Generic.kcm
          ConfigurationFile:
          HaveKeyboardLayoutOverlay: false
          VideoDevice: <none>

    如上所示，当KeyLayoutFile:字符后面是添加的kl文件 Vendor_0003_Product_0003.kl，说明匹配成功。