[Intel-gfx] [PATCH v2.1 2.7/12] drm/i915: Update atomic state when removing mst connector, v2.

[Maarten Lankhorst]

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.

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

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2 at gmail.com>
---
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7747520bf9f6..dfe4407b0390 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,
@@ -12751,13 +12747,6 @@ 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 585f0a45b3f1..35f2eb59818a 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -448,6 +448,49 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
 	return connector;
 }
 
+static void
+intel_dp_unbind_mst_connector(struct drm_device *dev,
+			      struct drm_connector *connector)
+{
+	struct drm_atomic_state *state;
+	struct drm_connector_state *conn_state;
+	struct drm_crtc *crtc = connector->state->crtc;
+	int ret;
+
+	if (!crtc)
+		return;
+
+	state = drm_atomic_state_alloc(dev);
+	if (!state)
+		return;
+
+	state->acquire_ctx = dev->mode_config.acquire_ctx;
+
+	conn_state = drm_atomic_get_connector_state(state, connector);
+	ret = PTR_ERR_OR_ZERO(conn_state);
+	if (!ret)
+		ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
+
+	if (!ret)
+		ret = drm_atomic_add_affected_connectors(state, crtc);
+
+	if (!ret && !drm_atomic_connectors_for_crtc(state, crtc)) {
+		struct drm_crtc_state *crtc_state =
+			drm_atomic_get_existing_crtc_state(state, crtc);
+
+		crtc_state->active = false;
+		ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
+	}
+
+	if (!ret)
+		ret = drm_atomic_commit(state);
+
+	if (ret)
+		drm_atomic_state_free(state);
+
+	I915_STATE_WARN_ON(ret);
+}
+
 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 					   struct drm_connector *connector)
 {
@@ -455,7 +498,7 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	struct drm_device *dev = connector->dev;
 	/* need to nuke the connector */
 	drm_modeset_lock_all(dev);
-	intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+	intel_dp_unbind_mst_connector(dev, connector);
 	drm_modeset_unlock_all(dev);
 
 	intel_connector->unregister(intel_connector);