drm/i915/tgl: allow DVI/HDMI on port A

Tiger Lake supports HDMI on port A. For other platforms we ignore what
the VBT says regarding HDMI to workaround broken VBTs, see
commit 2ba7d7e0 ("drm/i915/bios: ignore HDMI on port A"). Make this
apply gen12+ so they inherit the TGL behavior.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191113021935.41547-1-lucas.demarchi@intel.com

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

@@ -1450,7 +1450,7 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv,
 	is_hdmi = is_dvi && (child->device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
 	is_edp = is_dp && (child->device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
 
-	if (port == PORT_A && is_dvi) {
+	if (port == PORT_A && is_dvi && INTEL_GEN(dev_priv) < 12) {
 		DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n",
 			      is_hdmi ? "/HDMI" : "");
 		is_dvi = false;

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

@@ -3140,7 +3140,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 	DRM_DEBUG_KMS("Adding HDMI connector on [ENCODER:%d:%s]\n",
 		      intel_encoder->base.base.id, intel_encoder->base.name);
 
-	if (WARN_ON(port == PORT_A))
+	if (INTEL_GEN(dev_priv) < 12 && WARN_ON(port == PORT_A))
 		return;
 
 	if (WARN(intel_dig_port->max_lanes < 4,