[Video/KMSDRM]: Prefer largest compatible refresh rate by default.

src/video/kmsdrm/SDL_kmsdrmvulkan.c

@@ -156,6 +156,19 @@ char const * const *KMSDRM_Vulkan_GetInstanceExtensions(SDL_VideoDevice *_this,
     return extensionsForKMSDRM;
 }
 
+static int SDLCALL display_mode_comparator(const void *a_opaque, const void *b_opaque)
+{
+    const VkDisplayModePropertiesKHR *a = a_opaque;
+    const VkDisplayModePropertiesKHR *b = b_opaque;
+
+    if (a->parameters.refreshRate > b->parameters.refreshRate)
+        return -1;
+    else if (a->parameters.refreshRate < b->parameters.refreshRate)
+        return 1;
+    else
+        return 0;
+}
+
 /***********************************************************************/
 // First thing to know is that we don't call vkCreateInstance() here.
 // Instead, programs using SDL and Vulkan create their Vulkan instance
@@ -342,6 +355,9 @@ bool KMSDRM_Vulkan_CreateSurface(SDL_VideoDevice *_this,
                                   display,
                                   &mode_count, mode_props);
 
+    /* Sort the modes so that larger refresh rates come first. */
+    SDL_qsort(mode_props, mode_count, sizeof(*mode_props), display_mode_comparator);
+
     /* Get a video mode equal to the window size among the predefined ones,
        if possible.
        REMEMBER: We have to get a small enough videomode for the window size,