add support for linux-drm-syncobj-v1 (wlroots!4715)

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4262
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4715

CHANGELOG.md

@@ -8,6 +8,13 @@
 
 ## Unreleased
 ### Added
+
+* Support for the linux-drm-syncobj-v1 protocol ([wlroots!4715][wlroots!4715], [#685][685])
+
+[wlroots!4715]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4715
+[685]: https://codeberg.org/dwl/dwl/pulls/685
+
+
 ### Changed
 ### Deprecated
 ### Removed

dwl.c

@@ -33,6 +33,7 @@
 #include <wlr/types/wlr_keyboard_group.h>
 #include <wlr/types/wlr_layer_shell_v1.h>
 #include <wlr/types/wlr_linux_dmabuf_v1.h>
+#include <wlr/types/wlr_linux_drm_syncobj_v1.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_output_management_v1.h>
@@ -2430,7 +2431,7 @@ setsel(struct wl_listener *listener, void *data)
 void
 setup(void)
 {
-	int i, sig[] = {SIGCHLD, SIGINT, SIGTERM, SIGPIPE};
+	int drm_fd, i, sig[] = {SIGCHLD, SIGINT, SIGTERM, SIGPIPE};
 	struct sigaction sa = {.sa_flags = SA_RESTART, .sa_handler = handlesig};
 	sigemptyset(&sa.sa_mask);
 
@@ -2480,6 +2481,9 @@ setup(void)
 				wlr_linux_dmabuf_v1_create_with_renderer(dpy, 5, drw));
 	}
 
+	if ((drm_fd = wlr_renderer_get_drm_fd(drw)) >= 0 && drw->features.timeline)
+		wlr_linux_drm_syncobj_manager_v1_create(dpy, 1, drm_fd);
+
 	/* Autocreates an allocator for us.
 	 * The allocator is the bridge between the renderer and the backend. It
 	 * handles the buffer creation, allowing wlroots to render onto the