Add debug flag to re-enable wl_drm

7e69a7076fc8 ("Drop wl_drm") has dropped wl_drm, however a lot of
software wasn't quite ready for this (Xwayland, libva, amdvlk).
Keep wl_drm disabled by default to pressure the wl_drm phase-out,
but add a -Dlegacy-wl-drm flag for users to restore the previous
behavior in the meantime.

References: https://github.com/swaywm/sway/issues/7897

1 files changed, 5 insertions, 0 deletions

diff --git a/sway/server.c b/sway/server.c
index 33b25000..73bf9d70 100644
--- a/sway/server.c
+++ b/sway/server.c
@@ -13,6 +13,7 @@
 #include <wlr/types/wlr_content_type_v1.h>
 #include <wlr/types/wlr_cursor_shape_v1.h>
 #include <wlr/types/wlr_data_control_v1.h>
+#include <wlr/types/wlr_drm.h>
 #include <wlr/types/wlr_export_dmabuf_v1.h>
 #include <wlr/types/wlr_fractional_scale_v1.h>
 #include <wlr/types/wlr_gamma_control_v1.h>
@@ -191,6 +192,10 @@ bool server_init(struct sway_server *server) {
                 server->linux_dmabuf_v1 = wlr_linux_dmabuf_v1_create_with_renderer(
                         server->wl_display, 4, server->renderer);
         }
+        if (wlr_renderer_get_dmabuf_texture_formats(server->renderer) != NULL &&
+                        debug.legacy_wl_drm) {
+                wlr_drm_create(server->wl_display, server->renderer);
+        }
 
         server->allocator = wlr_allocator_autocreate(server->backend,
                 server->renderer);