diff --git a/drivers/gpu/drm/i915/display/g4x_dp.c b/drivers/gpu/drm/i915/display/g4x_dp.c
index fa754038d669..0cc1531a03a3 100644
--- a/drivers/gpu/drm/i915/display/g4x_dp.c
+++ b/drivers/gpu/drm/i915/display/g4x_dp.c
@@ -1279,11 +1279,19 @@ static const struct drm_encoder_funcs intel_dp_enc_funcs = {
 bool g4x_dp_init(struct drm_i915_private *dev_priv,
 		 i915_reg_t output_reg, enum port port)
 {
+	const struct intel_bios_encoder_data *devdata;
 	struct intel_digital_port *dig_port;
 	struct intel_encoder *intel_encoder;
 	struct drm_encoder *encoder;
 	struct intel_connector *intel_connector;
 
+	devdata = intel_bios_encoder_data_lookup(dev_priv, port);
+
+	/* FIXME bail? */
+	if (!devdata)
+		drm_dbg_kms(&dev_priv->drm, "No VBT child device for DP-%c\n",
+			    port_name(port));
+
 	dig_port = kzalloc(sizeof(*dig_port), GFP_KERNEL);
 	if (!dig_port)
 		return false;
@@ -1295,6 +1303,8 @@ bool g4x_dp_init(struct drm_i915_private *dev_priv,
 	intel_encoder = &dig_port->base;
 	encoder = &intel_encoder->base;
 
+	intel_encoder->devdata = devdata;
+
 	mutex_init(&dig_port->hdcp_mutex);
 
 	if (drm_encoder_init(&dev_priv->drm, &intel_encoder->base,
diff --git a/drivers/gpu/drm/i915/display/g4x_hdmi.c b/drivers/gpu/drm/i915/display/g4x_hdmi.c
index 64c3b3990702..e9ae4c67b8a4 100644
--- a/drivers/gpu/drm/i915/display/g4x_hdmi.c
+++ b/drivers/gpu/drm/i915/display/g4x_hdmi.c
@@ -548,10 +548,18 @@ intel_hdmi_hotplug(struct intel_encoder *encoder,
 void g4x_hdmi_init(struct drm_i915_private *dev_priv,
 		   i915_reg_t hdmi_reg, enum port port)
 {
+	const struct intel_bios_encoder_data *devdata;
 	struct intel_digital_port *dig_port;
 	struct intel_encoder *intel_encoder;
 	struct intel_connector *intel_connector;
 
+	devdata = intel_bios_encoder_data_lookup(dev_priv, port);
+
+	/* FIXME bail? */
+	if (!devdata)
+		drm_dbg_kms(&dev_priv->drm, "No VBT child device for HDMI-%c\n",
+			    port_name(port));
+
 	dig_port = kzalloc(sizeof(*dig_port), GFP_KERNEL);
 	if (!dig_port)
 		return;
@@ -564,6 +572,8 @@ void g4x_hdmi_init(struct drm_i915_private *dev_priv,
 
 	intel_encoder = &dig_port->base;
 
+	intel_encoder->devdata = devdata;
+
 	mutex_init(&dig_port->hdcp_mutex);
 
 	drm_encoder_init(&dev_priv->drm, &intel_encoder->base,