egl/dri2: set WL_bind_wayland_display in a consistent way

Introduce a helper and use it throughout the platform code. This allows
us to reduce the amount of ifdef(s) and (potentially) use
kms_swrast_dri.so for !drm platforms (namely wayland and x11).

Note: in the future as other platforms (android, surfaceless) support
the extension they can reuse the helper.

v2: Rebase, check for device_name.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>

src/egl/drivers/dri2/egl_dri2.h

@@ -397,4 +397,28 @@ const __DRIconfig *
 dri2_get_dri_config(struct dri2_egl_config *conf, EGLint surface_type,
                     EGLenum colorspace);
 
+static inline void
+dri2_set_WL_bind_wayland_display(_EGLDriver *drv, _EGLDisplay *disp)
+{
+#ifdef HAVE_WAYLAND_PLATFORM
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+
+   (void) drv;
+
+   if (dri2_dpy->device_name && dri2_dpy->image) {
+       if (dri2_dpy->image->base.version >= 10 &&
+           dri2_dpy->image->getCapabilities != NULL) {
+           int capabilities;
+
+           capabilities =
+               dri2_dpy->image->getCapabilities(dri2_dpy->dri_screen);
+           disp->Extensions.WL_bind_wayland_display =
+               (capabilities & __DRI_IMAGE_CAP_GLOBAL_NAMES) != 0;
+       } else {
+           disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
+       }
+   }
+#endif
+}
+
 #endif /* EGL_DRI2_INCLUDED */

src/egl/drivers/dri2/platform_drm.c

@@ -697,21 +697,9 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 
 #ifdef HAVE_WAYLAND_PLATFORM
-   if (dri2_dpy->image) {
-       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
-
-       if (dri2_dpy->image->base.version >= 10 &&
-           dri2_dpy->image->getCapabilities != NULL) {
-           int capabilities;
-
-           capabilities =
-               dri2_dpy->image->getCapabilities(dri2_dpy->dri_screen);
-           disp->Extensions.WL_bind_wayland_display =
-               (capabilities & __DRI_IMAGE_CAP_GLOBAL_NAMES) != 0;
-       } else
-           disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
-   }
+   dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 #endif
+   dri2_set_WL_bind_wayland_display(drv, disp);
 
    /* Fill vtbl last to prevent accidentally calling virtual function during
     * initialization.

src/egl/drivers/dri2/platform_wayland.c

@@ -1206,7 +1206,7 @@ dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
         dri2_add_config(disp, config, i + 1, types, NULL, rgb565_masks);
    }
 
-   disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
+   dri2_set_WL_bind_wayland_display(drv, disp);
    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
     * because the buffer of the EGLImage has likely a tiling mode the server
     * gpu won't support. These is no way to check for now. Thus do not support the

src/egl/drivers/dri2/platform_x11.c

@@ -1339,10 +1339,7 @@ dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
    disp->Extensions.EXT_buffer_age = EGL_TRUE;
 
-#ifdef HAVE_WAYLAND_PLATFORM
-   if (dri2_dpy->device_name)
-      disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
-#endif
+   dri2_set_WL_bind_wayland_display(drv, disp);
 
    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
       goto cleanup_configs;
@@ -1458,9 +1455,7 @@ dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
 
-#ifdef HAVE_WAYLAND_PLATFORM
-   disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
-#endif
+   dri2_set_WL_bind_wayland_display(drv, disp);
 
    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
       goto cleanup_configs;