backend/drm: simplify drm_fb_lock_surface

Make it take a plane instead, and rename to drm_plane_lock_surface.

backend/drm/drm.c

@@ -486,9 +486,8 @@ static bool drm_connector_commit_buffer(struct wlr_output *output) {
 	assert(output->pending.committed & WLR_OUTPUT_STATE_BUFFER);
 	switch (output->pending.buffer_type) {
 	case WLR_OUTPUT_STATE_BUFFER_RENDER:
-		if (!drm_fb_lock_surface(&plane->pending_fb, drm, &plane->surf,
-				&plane->mgpu_surf)) {
-			wlr_drm_conn_log(conn, WLR_ERROR, "drm_fb_lock_surface failed");
+		if (!drm_plane_lock_surface(plane, drm)) {
+			wlr_drm_conn_log(conn, WLR_ERROR, "drm_plane_lock_surface failed");
 			return false;
 		}
 		break;
@@ -681,8 +680,7 @@ static bool drm_connector_pageflip_renderer(struct wlr_drm_connector *conn) {
 		if (!drm_surface_render_black_frame(&plane->surf)) {
 			return false;
 		}
-		if (!drm_fb_lock_surface(&plane->pending_fb, drm, &plane->surf,
-				&plane->mgpu_surf)) {
+		if (!drm_plane_lock_surface(plane, drm)) {
 			return false;
 		}
 	}
@@ -949,8 +947,7 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 		wlr_render_texture_with_matrix(rend, texture, matrix, 1.0);
 		wlr_renderer_end(rend);
 
-		if (!drm_fb_lock_surface(&plane->pending_fb, drm, &plane->surf,
-				&plane->mgpu_surf)) {
+		if (!drm_plane_lock_surface(plane, drm)) {
 			return false;
 		}
 

backend/drm/renderer.c

@@ -294,17 +294,17 @@ void drm_fb_clear(struct wlr_drm_fb **fb_ptr) {
 	*fb_ptr = NULL;
 }
 
-bool drm_fb_lock_surface(struct wlr_drm_fb **fb_ptr, struct wlr_drm_backend *drm,
-		struct wlr_drm_surface *surf, struct wlr_drm_surface *mgpu) {
-	assert(surf->back_buffer != NULL);
-
-	struct wlr_buffer *buffer = wlr_buffer_lock(surf->back_buffer);
+bool drm_plane_lock_surface(struct wlr_drm_plane *plane,
+		struct wlr_drm_backend *drm) {
+	assert(plane->surf.back_buffer != NULL);
+	struct wlr_buffer *buffer = wlr_buffer_lock(plane->surf.back_buffer);
 
 	// Unset the current EGL context ASAP, because other operations may require
 	// making another context current.
-	drm_surface_unset_current(surf);
+	drm_surface_unset_current(&plane->surf);
 
-	bool ok = drm_fb_import(fb_ptr, drm, buffer, mgpu, NULL);
+	bool ok = drm_fb_import(&plane->pending_fb, drm, buffer,
+		&plane->mgpu_surf, NULL);
 	wlr_buffer_unlock(buffer);
 	return ok;
 }

include/backend/drm/renderer.h

@@ -46,8 +46,6 @@ void finish_drm_renderer(struct wlr_drm_renderer *renderer);
 bool drm_surface_make_current(struct wlr_drm_surface *surf, int *buffer_age);
 void drm_surface_unset_current(struct wlr_drm_surface *surf);
 
-bool drm_fb_lock_surface(struct wlr_drm_fb **fb, struct wlr_drm_backend *drm,
-		struct wlr_drm_surface *surf, struct wlr_drm_surface *mgpu);
 bool drm_fb_import(struct wlr_drm_fb **fb, struct wlr_drm_backend *drm,
 		struct wlr_buffer *buf, struct wlr_drm_surface *mgpu,
 		const struct wlr_drm_format_set *formats);
@@ -62,5 +60,7 @@ 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);
 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);
 
 #endif