Split drm update input (#3397)

* Update `PLATFORM_DRM` implementation of `GetGamepadAxisCount`

* Update

* Update `PLATFORM_DRM` implementation of `GetGamepadName`

* Add example to test gamepad info functions
Fix typo

* Update new gamepad info example

* Move axis count update out of GamepadThread - race condition

* Remove pointless if statement

examples/Makefile

@@ -365,6 +365,7 @@ CORE = \
     core/core_input_mouse \
     core/core_input_mouse_wheel \
     core/core_input_gamepad \
+    core/core_input_gamepad_info \
     core/core_input_multitouch \
     core/core_input_gestures \
     core/core_input_gestures_web \

examples/core/core_input_gamepad_info.c

@@ -0,0 +1,60 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - Gamepad information
+*
+*   NOTE: This example requires a Gamepad connected to the system
+*         Check raylib.h for buttons configuration
+*
+*   Example originally created with raylib 4.6, last time updated with raylib 4.6
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2013-2023 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);  // Set MSAA 4X hint before windows creation
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - gamepad information");
+
+    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
+
+    // Main game loop
+    while (!WindowShouldClose())        // Detect window close button or ESC key
+    {
+        int y = 10;
+
+        BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+        for (int i = 0; i < 4; i++)     // by default rcore.h has a MAX_GAMEPADS of 4 so mimmic that here.
+        {
+            if (IsGamepadAvailable(i))
+            {
+                DrawText(TextFormat("Gamepad:\n\tName: %s\n\tAxes: %d", GetGamepadName(i), GetGamepadAxisCount(i)), 10, y, 20, BLACK);
+                y += 40;
+            }
+        }
+
+        EndDrawing();
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+}

src/rcore_drm.c

@@ -742,25 +742,12 @@ void OpenURL(const char *url)
 // Get gamepad internal name id
 const char *GetGamepadName(int gamepad)
 {
-    const char *name = NULL;
-
-    if (CORE.Input.Gamepad.ready[gamepad])
-    {
-        ioctl(platform.gamepadStreamFd[gamepad], JSIOCGNAME(64), &CORE.Input.Gamepad.name[gamepad]);
-        name = CORE.Input.Gamepad.name[gamepad];
-    }
-
-    return name;
+    return CORE.Input.Gamepad.name[gamepad];
 }
 
 // Get gamepad axis count
 int GetGamepadAxisCount(int gamepad)
 {
-    int axisCount = 0;
-
-    if (CORE.Input.Gamepad.ready[gamepad]) ioctl(platform.gamepadStreamFd[gamepad], JSIOCGAXES, &axisCount);
-    CORE.Input.Gamepad.axisCount = axisCount;
-
     return CORE.Input.Gamepad.axisCount;
 }
 
@@ -1959,6 +1946,9 @@ static void InitGamepad(void)
                 if (error != 0) TRACELOG(LOG_WARNING, "RPI: Failed to create gamepad input event thread");
                 else  TRACELOG(LOG_INFO, "RPI: Gamepad device initialized successfully");
             }
+
+            ioctl(platform.gamepadStreamFd[i], JSIOCGNAME(64), &CORE.Input.Gamepad.name[i]);
+            ioctl(platform.gamepadStreamFd[i], JSIOCGAXES, &CORE.Input.Gamepad.axisCount);
         }
     }
 }