drm/i915: Mark all HPD capabled connectors as such

Currently we only set the DRM_CONNECTOR_POLL_{DISCONNECT,CONNECT}
bits in intel_connector->polled (the base setting), leading to
some confusing looking code to reset drm_connector->polled
(the actual setting) to DRM_CONNECTOR_POLL_HPD. Let's set
intel_connector->polled = DRM_CONNECTOR_POLL_HPD for all hpd
capable connectors, and then we don't need so many special
cases in the hotplug code.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200205183546.9291-3-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -1046,6 +1046,7 @@ void intel_crt_init(struct drm_i915_private *dev_priv)
 	    !dmi_check_system(intel_spurious_crt_detect)) {
 		crt->base.hpd_pin = HPD_CRT;
 		crt->base.hotplug = intel_encoder_hotplug;
+		intel_connector->polled = DRM_CONNECTOR_POLL_HPD;
 	} else {
 		intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT;
 	}

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

@@ -7710,6 +7710,7 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 		connector->ycbcr_420_allowed = true;
 
 	intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
+	intel_connector->polled = DRM_CONNECTOR_POLL_HPD;
 
 	intel_dp_aux_init(intel_dp);
 

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

@@ -3176,6 +3176,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 		connector->ycbcr_420_allowed = true;
 
 	intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
+	intel_connector->polled = DRM_CONNECTOR_POLL_HPD;
 
 	if (HAS_DDI(dev_priv))
 		intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;

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

@@ -262,8 +262,6 @@ static void intel_hpd_irq_storm_reenable_work(struct work_struct *work)
 			DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
 					 connector->base.name);
 		connector->base.polled = connector->polled;
-		if (!connector->base.polled)
-			connector->base.polled = DRM_CONNECTOR_POLL_HPD;
 	}
 	drm_connector_list_iter_end(&conn_iter);
 
@@ -620,16 +618,17 @@ static void i915_hpd_poll_init_work(struct work_struct *work)
 
 	drm_connector_list_iter_begin(dev, &conn_iter);
 	for_each_intel_connector_iter(connector, &conn_iter) {
-		enum hpd_pin pin = intel_connector_hpd_pin(connector);
+		enum hpd_pin pin;
+
+		pin = intel_connector_hpd_pin(connector);
+		if (pin == HPD_NONE)
+			continue;
 
 		connector->base.polled = connector->polled;
 
-		if (pin != HPD_NONE && I915_HAS_HOTPLUG(dev_priv) &&
-		    !connector->base.polled)
-			connector->base.polled = enabled ?
-				DRM_CONNECTOR_POLL_CONNECT |
-				DRM_CONNECTOR_POLL_DISCONNECT :
-				DRM_CONNECTOR_POLL_HPD;
+		if (enabled && connector->base.polled == DRM_CONNECTOR_POLL_HPD)
+			connector->base.polled = DRM_CONNECTOR_POLL_CONNECT |
+				DRM_CONNECTOR_POLL_DISCONNECT;
 	}
 	drm_connector_list_iter_end(&conn_iter);
 

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

@@ -2721,6 +2721,7 @@ intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int device)
 		 * Some SDVO devices have one-shot hotplug interrupts.
 		 * Ensure that they get re-enabled when an interrupt happens.
 		 */
+		intel_connector->polled = DRM_CONNECTOR_POLL_HPD;
 		intel_encoder->hotplug = intel_sdvo_hotplug;
 		intel_sdvo_enable_hotplug(intel_encoder);
 	} else {