drm/i915: Update atomic state when removing mst connector, v3.

Fully remove the MST connector from the atomic state, and remove the
early returns in check_*_state for MST connectors.

With atomic the state can be made consistent all the time.

Thanks to Sivakumar Thulasimani for the idea of using
drm_atomic_helper_set_config.

Changes since v1:
- Remove the MST check in intel_connector_check_state too.
Changes since v2:
- Use drm_atomic_helper_set_config.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 585f0a45b3f1..5e75d6f8ba8c 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -453,9 +453,20 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 {
 	struct intel_connector *intel_connector = to_intel_connector(connector);
 	struct drm_device *dev = connector->dev;
+
 	/* need to nuke the connector */
 	drm_modeset_lock_all(dev);
-	intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+	if (connector->state->crtc) {
+		struct drm_mode_set set;
+		int ret;
+
+		memset(&set, 0, sizeof(set));
+		set.crtc = connector->state->crtc,
+
+		ret = drm_atomic_helper_set_config(&set);
+
+		WARN(ret, "Disabling mst crtc failed with %i\n", ret);
+	}
 	drm_modeset_unlock_all(dev);
 
 	intel_connector->unregister(intel_connector);