drm/i915/icl: Set TC type to unknown when a sudden disconnection happen

Otherwise it would be in a inconsistent state as port is disconnected
but with a valid tc type.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181030215750.28213-3-jose.souza@intel.com

drivers/gpu/drm/i915/intel_dp.c

@@ -5031,6 +5031,9 @@ static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
 			      type_str);
 }
 
+static void icl_tc_phy_disconnect(struct drm_i915_private *dev_priv,
+				  struct intel_digital_port *dig_port);
+
 /*
  * This function implements the first part of the Connect Flow described by our
  * specification, Gen11 TypeC Programming chapter. The rest of the flow (reading
@@ -5085,9 +5088,7 @@ static bool icl_tc_phy_connect(struct drm_i915_private *dev_priv,
 	if (dig_port->tc_type == TC_PORT_TYPEC &&
 	    !(I915_READ(PORT_TX_DFLEXDPSP) & TC_LIVE_STATE_TC(tc_port))) {
 		DRM_DEBUG_KMS("TC PHY %d sudden disconnect.\n", tc_port);
-		val = I915_READ(PORT_TX_DFLEXDPCSSS);
-		val &= ~DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
-		I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
+		icl_tc_phy_disconnect(dev_priv, dig_port);
 		return false;
 	}