backend-drm: Add failure reasons for failing gbm_bo_import

And add it to the list of failures triggering a resend of
dmabuf feedback scanout tranches.

Closes https://gitlab.freedesktop.org/wayland/weston/-/issues/614

Signed-off-by: Robert Mader <robert.mader@collabora.com>

libweston/backend-drm/drm-internal.h

@@ -245,6 +245,7 @@ enum try_view_on_plane_failure_reasons {
 	FAILURE_REASONS_BUFFER_TYPE = 1 << 9,
 	FAILURE_REASONS_GLOBAL_ALPHA = 1 << 10,
 	FAILURE_REASONS_NO_GBM = 1 << 11,
+	FAILURE_REASONS_GBM_BO_IMPORT_FAILED = 1 << 12,
 };
 
 /**

libweston/backend-drm/fb.c

@@ -276,8 +276,12 @@ drm_fb_get_from_dmabuf(struct linux_dmabuf_buffer *dmabuf,
 
 	fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD_MODIFIER,
 			       &import_mod, GBM_BO_USE_SCANOUT);
-	if (!fb->bo)
+	if (!fb->bo) {
+		if (try_view_on_plane_failure_reasons)
+			*try_view_on_plane_failure_reasons |=
+				FAILURE_REASONS_GBM_BO_IMPORT_FAILED;
 		goto err_free;
+	}
 
 	fb->width = dmabuf->attributes.width;
 	fb->height = dmabuf->attributes.height;

libweston/backend-drm/state-propose.c

@@ -340,7 +340,8 @@ dmabuf_feedback_maybe_update(struct drm_backend *b, struct weston_view *ev,
 	if (try_view_on_plane_failure_reasons &
 		(FAILURE_REASONS_ADD_FB_FAILED |
 		 FAILURE_REASONS_FB_FORMAT_INCOMPATIBLE |
-		 FAILURE_REASONS_DMABUF_MODIFIER_INVALID))
+		 FAILURE_REASONS_DMABUF_MODIFIER_INVALID |
+		 FAILURE_REASONS_GBM_BO_IMPORT_FAILED))
 		action_needed |= ACTION_NEEDED_ADD_SCANOUT_TRANCHE;
 
 	assert(action_needed != (ACTION_NEEDED_REMOVE_SCANOUT_TRANCHE |