backend/drm: remove format arg from drm_plane_init_surface

This was always set to ARGB8888.

backend/drm/drm.c

@@ -676,10 +676,9 @@ static bool drm_connector_init_renderer(struct wlr_drm_connector *conn,
 
 	int width = mode.hdisplay;
 	int height = mode.vdisplay;
-	uint32_t format = DRM_FORMAT_ARGB8888;
 
 	bool modifiers = drm->addfb2_modifiers;
-	if (!drm_plane_init_surface(plane, drm, width, height, format, modifiers) ||
+	if (!drm_plane_init_surface(plane, drm, width, height, modifiers) ||
 			!drm_connector_pageflip_renderer(conn, state)) {
 		if (!modifiers) {
 			wlr_drm_conn_log(conn, WLR_ERROR, "Failed to initialize renderer:"
@@ -694,8 +693,7 @@ static bool drm_connector_init_renderer(struct wlr_drm_connector *conn,
 			"retrying without modifiers");
 		modifiers = false;
 
-		if (!drm_plane_init_surface(plane, drm, width, height, format,
-				modifiers)) {
+		if (!drm_plane_init_surface(plane, drm, width, height, modifiers)) {
 			return false;
 		}
 		if (!drm_connector_pageflip_renderer(conn, state)) {
@@ -860,8 +858,7 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 		ret = drmGetCap(drm->fd, DRM_CAP_CURSOR_HEIGHT, &h);
 		h = ret ? 64 : h;
 
-		if (!drm_plane_init_surface(plane, drm, w, h,
-				DRM_FORMAT_ARGB8888, true)) {
+		if (!drm_plane_init_surface(plane, drm, w, h, true)) {
 			wlr_drm_conn_log(conn, WLR_ERROR, "Cannot allocate cursor resources");
 			return false;
 		}

backend/drm/renderer.c

@@ -193,7 +193,9 @@ static struct wlr_drm_format *create_linear_format(uint32_t format) {
 
 bool drm_plane_init_surface(struct wlr_drm_plane *plane,
 		struct wlr_drm_backend *drm, int32_t width, uint32_t height,
-		uint32_t format, bool with_modifiers) {
+		bool with_modifiers) {
+	uint32_t format = DRM_FORMAT_ARGB8888;
+
 	if (!wlr_drm_format_set_has(&plane->formats, format, DRM_FORMAT_MOD_INVALID)) {
 		const struct wlr_pixel_format_info *info =
 			drm_get_pixel_format_info(format);

include/backend/drm/renderer.h

@@ -57,7 +57,7 @@ bool drm_surface_render_black_frame(struct wlr_drm_surface *surf);
 
 bool drm_plane_init_surface(struct wlr_drm_plane *plane,
 		struct wlr_drm_backend *drm, int32_t width, uint32_t height,
-		uint32_t format, bool with_modifiers);
+		bool with_modifiers);
 void drm_plane_finish_surface(struct wlr_drm_plane *plane);
 bool drm_plane_lock_surface(struct wlr_drm_plane *plane,
 		struct wlr_drm_backend *drm);