drm/i915: Enable AUX power for HDMI DDI/TypeC main link too

DDI/TypeC ports need the AUX power domain for main link functionality
even when they operate in HDMI static mode, so enable the power domain
for these ports too.

v4:
- Rebase on the upstream ICL pre_pll_enable change.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181101140427.31026-7-imre.deak@intel.com

drivers/gpu/drm/i915/intel_ddi.c

@@ -2103,6 +2103,7 @@ intel_ddi_main_link_aux_domain(struct intel_digital_port *dig_port)
 static u64 intel_ddi_get_power_domains(struct intel_encoder *encoder,
 				       struct intel_crtc_state *crtc_state)
 {
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_digital_port *dig_port;
 	u64 domains;
 
@@ -2117,8 +2118,12 @@ static u64 intel_ddi_get_power_domains(struct intel_encoder *encoder,
 	dig_port = enc_to_dig_port(&encoder->base);
 	domains = BIT_ULL(dig_port->ddi_io_power_domain);
 
-	/* AUX power is only needed for (e)DP mode, not for HDMI. */
-	if (intel_crtc_has_dp_encoder(crtc_state))
+	/*
+	 * AUX power is only needed for (e)DP mode, and for HDMI mode on TC
+	 * ports.
+	 */
+	if (intel_crtc_has_dp_encoder(crtc_state) ||
+	    intel_port_is_tc(dev_priv, encoder->port))
 		domains |= BIT_ULL(intel_ddi_main_link_aux_domain(dig_port));
 
 	return domains;
@@ -3331,7 +3336,8 @@ intel_ddi_pre_pll_enable(struct intel_encoder *encoder,
 	struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
 	enum port port = encoder->port;
 
-	if (intel_crtc_has_dp_encoder(crtc_state))
+	if (intel_crtc_has_dp_encoder(crtc_state) ||
+	    intel_port_is_tc(dev_priv, encoder->port))
 		intel_display_power_get(dev_priv,
 					intel_ddi_main_link_aux_domain(dig_port));