drm/i915: Fix SKL DDI A digital port .connected()

SKL doesn't have any north DE hotplug stuff. Currently we're
trying to read DDI A live state from the BDW north DE bit,
instead of the approproate south DE bit. Fix it.

And for good measure clear the pointer to the north hpd
pin array, so that we'll actually notice if some other
place is also using the wrong thing.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230302161013.29213-3-ville.syrjala@linux.intel.com

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

@@ -4510,13 +4510,16 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 			dig_port->connected = intel_tc_port_connected;
 		else
 			dig_port->connected = lpt_digital_port_connected;
-	} else if (DISPLAY_VER(dev_priv) >= 8) {
-		if (port == PORT_A || IS_GEMINILAKE(dev_priv) ||
-		    IS_BROXTON(dev_priv))
+	} else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
+		dig_port->connected = bdw_digital_port_connected;
+	} else if (DISPLAY_VER(dev_priv) == 9) {
+		dig_port->connected = lpt_digital_port_connected;
+	} else if (IS_BROADWELL(dev_priv)) {
+		if (port == PORT_A)
 			dig_port->connected = bdw_digital_port_connected;
 		else
 			dig_port->connected = lpt_digital_port_connected;
-	} else {
+	} else if (IS_HASWELL(dev_priv)) {
 		if (port == PORT_A)
 			dig_port->connected = hsw_digital_port_connected;
 		else

drivers/gpu/drm/i915/i915_irq.c

@@ -197,6 +197,8 @@ static void intel_hpd_init_pins(struct drm_i915_private *dev_priv)
 		hpd->hpd = hpd_gen11;
 	else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
 		hpd->hpd = hpd_bxt;
+	else if (DISPLAY_VER(dev_priv) == 9)
+		hpd->hpd = NULL; /* no north HPD on SKL */
 	else if (DISPLAY_VER(dev_priv) >= 8)
 		hpd->hpd = hpd_bdw;
 	else if (DISPLAY_VER(dev_priv) >= 7)