drm/i915/tgl: init ddi port A-C for Tiger Lake

This patch initializes DDI PORT A, B & C for Tiger lake. Other
TC ports need to be initialized later once corresponding code is there.

Cc: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711173115.28296-15-lucas.demarchi@intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -15312,13 +15312,18 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 	if (!HAS_DISPLAY(dev_priv))
 		return;
 
-	if (IS_ELKHARTLAKE(dev_priv)) {
+	if (INTEL_GEN(dev_priv) >= 12) {
+		/* TODO: initialize TC ports as well */
+		intel_ddi_init(dev_priv, PORT_A);
+		intel_ddi_init(dev_priv, PORT_B);
+		intel_ddi_init(dev_priv, PORT_C);
+	} else if (IS_ELKHARTLAKE(dev_priv)) {
 		intel_ddi_init(dev_priv, PORT_A);
 		intel_ddi_init(dev_priv, PORT_B);
 		intel_ddi_init(dev_priv, PORT_C);
 		intel_ddi_init(dev_priv, PORT_D);
 		icl_dsi_init(dev_priv);
-	} else if (INTEL_GEN(dev_priv) >= 11) {
+	} else if (IS_GEN(dev_priv, 11)) {
 		intel_ddi_init(dev_priv, PORT_A);
 		intel_ddi_init(dev_priv, PORT_B);
 		intel_ddi_init(dev_priv, PORT_C);