drm: Complain if pageflip fails

We still don't handle the error in any way, but there's not much we can do.
It's typically a case of not having drm master."

diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index c07eb2d..b5914a4 100644 (file)
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -112,9 +112,12 @@ drm_output_present(struct weston_output *output_base)
                fb_id = output->fb_id[output->current ^ 1];
        }
 
-       drmModePageFlip(c->drm.fd, output->crtc_id,
-                       fb_id,
-                       DRM_MODE_PAGE_FLIP_EVENT, output);
+       if (drmModePageFlip(c->drm.fd, output->crtc_id,
+                           fb_id,
+                           DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
+               fprintf(stderr, "queueing pageflip failed: %m\n");
+               return -1;
+       }
 
        return 0;
 }