Require CONFIG_HID_PLAYSTATION for DualSense key layout

Some olders kernels don't yet support HID_PLAYSTATION. While they are
working on supporting this driver, provide this temporary solution.

Before this patch, if the key layout is loaded, but there is no
HID_PLAYSTATION, then the mappings on the device will be incorrect.

With this patch, this key layout will not be loaded unless there is a
CONFIG_HID_PLAYSTATION enabled on the device.

Instead, when the main layout cannot be loaded, we make another attempt
to load a fallback layout. This way, the mappings on DualSense can be
correct even if the HID_PLAYSTATION module is not loaded.

In this CL, the fallback layout was tested using controllerTester.

Bug: 228005926
Test: tested mappings with a DualSense controller on a device that does
not have CONFIG_HID_PLAYSTATION

Change-Id: I7e46ae1943cd2c63b8c0b03fdf5d71adeea89f6f
Merged-In: I7e46ae1943cd2c63b8c0b03fdf5d71adeea89f6f

core/jni/Android.bp

@@ -401,6 +401,7 @@ cc_library_shared {
                 // (e.g. gDefaultServiceManager)
                 "libbinder",
                 "libhidlbase", // libhwbinder is in here
+                "libvintf",
             ],
         },
     },

data/keyboards/Vendor_054c_Product_0ce6.kl

@@ -16,6 +16,8 @@
 # Sony Playstation(R) DualSense Controller
 #
 
+# Only use this key layout if we have HID_PLAYSTATION!
+requires_kernel_config CONFIG_HID_PLAYSTATION
 
 # Mapping according to https://developer.android.com/training/game-controllers/controller-input.html
 

data/keyboards/Vendor_054c_Product_0ce6_fallback.kl

@@ -0,0 +1,75 @@
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#
+# Sony Playstation(R) DualSense Controller
+#
+
+# Use this if HID_PLAYSTATION is not available
+
+# Mapping according to https://developer.android.com/training/game-controllers/controller-input.html
+
+# Square
+key 304   BUTTON_X
+# Cross
+key 305   BUTTON_A
+# Circle
+key 306   BUTTON_B
+# Triangle
+key 307   BUTTON_Y
+
+key 308   BUTTON_L1
+key 309   BUTTON_R1
+key 310   BUTTON_L2
+key 311   BUTTON_R2
+
+# L2 axis
+axis 0x03   LTRIGGER
+# R2 axis
+axis 0x04   RTRIGGER
+
+# Left Analog Stick
+axis 0x00   X
+axis 0x01   Y
+# Right Analog Stick
+axis 0x02   Z
+axis 0x05   RZ
+
+# Left stick click
+key 314   BUTTON_THUMBL
+# Right stick click
+key 315   BUTTON_THUMBR
+
+# Hat
+axis 0x10   HAT_X
+axis 0x11   HAT_Y
+
+# Mapping according to https://www.kernel.org/doc/Documentation/input/gamepad.txt
+# Share / "half-sun"
+key 312   BUTTON_SELECT
+# Options / three horizontal lines
+key 313   BUTTON_START
+# PS key
+key 316   BUTTON_MODE
+
+# Touchpad press
+key 317 BUTTON_1
+
+# SENSORs
+sensor 0x00 ACCELEROMETER X
+sensor 0x01 ACCELEROMETER Y
+sensor 0x02 ACCELEROMETER Z
+sensor 0x03 GYROSCOPE X
+sensor 0x04 GYROSCOPE Y
+sensor 0x05 GYROSCOPE Z

tools/validatekeymaps/Android.bp

@@ -21,6 +21,7 @@ cc_binary_host {
     cflags: [
         "-Wall",
         "-Werror",
+        "-Wextra",
     ],
 
     static_libs: [
@@ -31,6 +32,9 @@ cc_binary_host {
         "liblog",
         "libui-types",
     ],
+    shared_libs: [
+        "libvintf",
+    ],
     target: {
         host_linux: {
             static_libs: [

tools/validatekeymaps/Main.cpp

@@ -141,6 +141,11 @@ static bool validateFile(const char* filename) {
             }
             base::Result<std::shared_ptr<KeyLayoutMap>> ret = KeyLayoutMap::load(filename);
             if (!ret.ok()) {
+                if (ret.error().message() == "Missing kernel config") {
+                    // It means the layout is valid, but won't be loaded on this device because
+                    // this layout requires a certain kernel config.
+                    return true;
+                }
                 error("Error %s parsing key layout file.\n\n", ret.error().message().c_str());
                 return false;
             }