[PATCH v3.1 2/3] drm/i915: Update atomic state when removing mst connector, v3.

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

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>
---
 drivers/gpu/drm/i915/intel_display.c | 11 -----------
 drivers/gpu/drm/i915/intel_dp_mst.c  | 13 ++++++++++++-
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5e40b7e7013a..77b4da7e698c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6370,10 +6370,6 @@ static void intel_connector_check_state(struct intel_connector *connector)
 			      connector->base.base.id,
 			      connector->base.name);
 
-		/* there is no real hw state for MST connectors */
-		if (connector->mst_port)
-			return;
-
 		I915_STATE_WARN(connector->base.dpms == DRM_MODE_DPMS_OFF,
 		     "wrong connector dpms state\n");
 		I915_STATE_WARN(connector->base.encoder != &encoder->base,
@@ -12749,13 +12745,6 @@ check_encoder_state(struct drm_device *dev)
 					encoder->base.crtc,
 			     "connector's crtc doesn't match encoder crtc\n");
 		}
-		/*
-		 * for MST connectors if we unplug the connector is gone
-		 * away but the encoder is still connected to a crtc
-		 * until a modeset happens in response to the hotplug.
-		 */
-		if (!enabled && encoder->base.encoder_type == DRM_MODE_ENCODER_DPMST)
-			continue;
 
 		I915_STATE_WARN(!!encoder->base.crtc != enabled,
 		     "encoder's enabled state mismatch "
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index ff01569158ea..91ad17110c2f 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -467,9 +467,20 @@ 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);
-- 
2.1.0

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