drm: Add KMS debug printk's for encoder and crtc fixup failure

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index f88a9b2..f236644 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -372,11 +372,13 @@
 		encoder_funcs = encoder->helper_private;
 		if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
 						      adjusted_mode))) {
+			DRM_DEBUG_KMS("Encoder fixup failed\n");
 			goto done;
 		}
 	}
 
 	if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
+		DRM_DEBUG_KMS("CRTC fixup failed\n");
 		goto done;
 	}
 	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);