Do not load keylayout if required kernel module is missing

Some key layouts require the presence of a specific kernel module. If
the kernel module is not present, the layout should not be loaded.

In this CL, we add an option to specify which kernel modules / configs
are needed inside the kl file.

Bug: 228005926
Test: atest libinput_tests
Merged-In: I0d2ab6298bd41df6dc56120bf0385e10da6c3bfe
Change-Id: I0d2ab6298bd41df6dc56120bf0385e10da6c3bfe

3 files changed, 10 insertions, 6 deletions

diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index c4f03c9119..3585392c2b 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -300,6 +300,8 @@ enum class InputDeviceConfigurationFileType : int32_t {
 /*
  * Gets the path of an input device configuration file, if one is available.
  * Considers both system provided and user installed configuration files.
+ * The optional suffix is appended to the end of the file name (before the
+ * extension).
  *
  * The device identifier is used to construct several default configuration file
  * names to try based on the device name, vendor, product, and version.
@@ -307,8 +309,8 @@ enum class InputDeviceConfigurationFileType : int32_t {
  * Returns an empty string if not found.
  */
 extern std::string getInputDeviceConfigurationFilePathByDeviceIdentifier(
-        const InputDeviceIdentifier& deviceIdentifier,
-        InputDeviceConfigurationFileType type);
+        const InputDeviceIdentifier& deviceIdentifier, InputDeviceConfigurationFileType type,
+        const char* suffix = "");
 
 /*
  * Gets the path of an input device configuration file, if one is available.
diff --git a/include/input/KeyLayoutMap.h b/include/input/KeyLayoutMap.h
index d1925f4eee..50849506a4 100644
--- a/include/input/KeyLayoutMap.h
+++ b/include/input/KeyLayoutMap.h
@@ -22,6 +22,7 @@
 #include <utils/Errors.h>
 #include <utils/KeyedVector.h>
 #include <utils/Tokenizer.h>
+#include <set>
 
 #include <input/InputDevice.h>
 
@@ -64,7 +65,8 @@ struct AxisInfo {
  */
 class KeyLayoutMap {
 public:
-    static base::Result<std::shared_ptr<KeyLayoutMap>> load(const std::string& filename);
+    static base::Result<std::shared_ptr<KeyLayoutMap>> load(const std::string& filename,
+                                                            const char* contents = nullptr);
     static base::Result<std::shared_ptr<KeyLayoutMap>> loadContents(const std::string& filename,
                                                                     const char* contents);
 
@@ -104,6 +106,7 @@ private:
     KeyedVector<int32_t, Led> mLedsByScanCode;
     KeyedVector<int32_t, Led> mLedsByUsageCode;
     std::unordered_map<int32_t, Sensor> mSensorsByAbsCode;
+    std::set<std::string> mRequiredKernelConfigs;
     std::string mLoadFileName;
 
     KeyLayoutMap();
@@ -124,6 +127,7 @@ private:
         status_t parseAxis();
         status_t parseLed();
         status_t parseSensor();
+        status_t parseRequiredKernelConfig();
     };
 };
 
diff --git a/include/input/Keyboard.h b/include/input/Keyboard.h
index 08ad8c6e5a..9a3e15f1cd 100644
--- a/include/input/Keyboard.h
+++ b/include/input/Keyboard.h
@@ -61,9 +61,7 @@ private:
     bool probeKeyMap(const InputDeviceIdentifier& deviceIdentifier, const std::string& name);
     status_t loadKeyLayout(const InputDeviceIdentifier& deviceIdentifier, const std::string& name);
     status_t loadKeyCharacterMap(const InputDeviceIdentifier& deviceIdentifier,
-            const std::string& name);
-    std::string getPath(const InputDeviceIdentifier& deviceIdentifier,
-            const std::string& name, InputDeviceConfigurationFileType type);
+                                 const std::string& name);
 };
 
 /**