[PATCH 06/14] drm: kill unnecessary calls to connector->detect

[Daniel Vetter]

Only call that function if something has actually changed (i.e. in the
output polling or hdp handling functions) or when userspace asks for
the information and DRM_CONNECTOR_POLL_FORCE is set.

Let's see how many bugs this uncovers.

v2: Run ->detect if the current connector status is 'unknown' -
otherwise we won't ever detect the boot-up/resume state correctly.

Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/drm_crtc_helper.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc_helper.c 
b/drivers/gpu/drm/drm_crtc_helper.c
index 8ea1c1e..db93e4d 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -107,7 +107,8 @@ int drm_helper_probe_single_connector_modes(struct 
drm_connector *connector,
                        connector->status = connector_status_disconnected;
                if (connector->funcs->force)
                        connector->funcs->force(connector);
-       } else {
+       } else if (connector->polled & DRM_CONNECTOR_POLL_FORCE ||
+                  connector->status == connector_status_unknown) {
                connector->status = connector->funcs->detect(connector, true);
                drm_kms_helper_poll_enable(dev);
        }
-- 
1.7.7.6