drm/i915: add a common connector type independent destroy hook

Almost all of the connector destroy functions do the same thing. The
differences are in the edid, detect_edid and panel cleanups, but those
are safely NULL when not initialized. Roll out a common connector
destroy hook.

Inspired by commit bc3213c4 ("drm/i915: Drop the eDP check from
intel_dp_connector_destroy()").

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181009141103.20387-1-jani.nikula@intel.com

drivers/gpu/drm/i915/intel_crt.c

@@ -849,12 +849,6 @@ intel_crt_detect(struct drm_connector *connector,
 	return status;
 }
 
-static void intel_crt_destroy(struct drm_connector *connector)
-{
-	drm_connector_cleanup(connector);
-	kfree(connector);
-}
-
 static int intel_crt_get_modes(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
@@ -909,7 +903,7 @@ static const struct drm_connector_funcs intel_crt_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
-	.destroy = intel_crt_destroy,
+	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 };

drivers/gpu/drm/i915/intel_display.c

@@ -6365,7 +6365,7 @@ struct intel_connector *intel_connector_alloc(void)
  * This should only be used after intel_connector_alloc has returned
  * successfully, and before drm_connector_init returns successfully.
  * Otherwise the destroy callbacks for the connector and the state should
- * take care of proper cleanup/free
+ * take care of proper cleanup/free (see intel_connector_destroy).
  */
 void intel_connector_free(struct intel_connector *connector)
 {
@@ -6373,6 +6373,24 @@ void intel_connector_free(struct intel_connector *connector)
 	kfree(connector);
 }
 
+/*
+ * Connector type independent destroy hook for drm_connector_funcs.
+ */
+void intel_connector_destroy(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	kfree(intel_connector->detect_edid);
+
+	if (!IS_ERR_OR_NULL(intel_connector->edid))
+		kfree(intel_connector->edid);
+
+	intel_panel_fini(&intel_connector->panel);
+
+	drm_connector_cleanup(connector);
+	kfree(connector);
+}
+
 /* Simple connector->get_hw_state implementation for encoders that support only
  * one connector and no cloning and hence the encoder state determines the state
  * of the connector. */

drivers/gpu/drm/i915/intel_dp.c

@@ -5251,22 +5251,6 @@ intel_dp_connector_unregister(struct drm_connector *connector)
 	intel_connector_unregister(connector);
 }
 
-static void
-intel_dp_connector_destroy(struct drm_connector *connector)
-{
-	struct intel_connector *intel_connector = to_intel_connector(connector);
-
-	kfree(intel_connector->detect_edid);
-
-	if (!IS_ERR_OR_NULL(intel_connector->edid))
-		kfree(intel_connector->edid);
-
-	intel_panel_fini(&intel_connector->panel);
-
-	drm_connector_cleanup(connector);
-	kfree(connector);
-}
-
 void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 {
 	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
@@ -5613,7 +5597,7 @@ static const struct drm_connector_funcs intel_dp_connector_funcs = {
 	.atomic_set_property = intel_digital_connector_atomic_set_property,
 	.late_register = intel_dp_connector_register,
 	.early_unregister = intel_dp_connector_unregister,
-	.destroy = intel_dp_connector_destroy,
+	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
 };

drivers/gpu/drm/i915/intel_dp_mst.c

@@ -335,24 +335,12 @@ intel_dp_mst_detect(struct drm_connector *connector, bool force)
 				      intel_connector->port);
 }
 
-static void
-intel_dp_mst_connector_destroy(struct drm_connector *connector)
-{
-	struct intel_connector *intel_connector = to_intel_connector(connector);
-
-	if (!IS_ERR_OR_NULL(intel_connector->edid))
-		kfree(intel_connector->edid);
-
-	drm_connector_cleanup(connector);
-	kfree(connector);
-}
-
 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 	.detect = intel_dp_mst_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
-	.destroy = intel_dp_mst_connector_destroy,
+	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 };

drivers/gpu/drm/i915/intel_drv.h

@@ -1510,6 +1510,7 @@ void intel_encoder_destroy(struct drm_encoder *encoder);
 int intel_connector_init(struct intel_connector *);
 struct intel_connector *intel_connector_alloc(void);
 void intel_connector_free(struct intel_connector *connector);
+void intel_connector_destroy(struct drm_connector *connector);
 bool intel_connector_get_hw_state(struct intel_connector *connector);
 void intel_connector_attach_encoder(struct intel_connector *connector,
 				    struct intel_encoder *encoder);

drivers/gpu/drm/i915/intel_dvo.c

@@ -333,18 +333,11 @@ static int intel_dvo_get_modes(struct drm_connector *connector)
 	return 0;
 }
 
-static void intel_dvo_destroy(struct drm_connector *connector)
-{
-	drm_connector_cleanup(connector);
-	intel_panel_fini(&to_intel_connector(connector)->panel);
-	kfree(connector);
-}
-
 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 	.detect = intel_dvo_detect,
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
-	.destroy = intel_dvo_destroy,
+	.destroy = intel_connector_destroy,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,

drivers/gpu/drm/i915/intel_hdmi.c

@@ -2073,9 +2073,8 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 {
 	if (intel_attached_hdmi(connector)->cec_notifier)
 		cec_notifier_put(intel_attached_hdmi(connector)->cec_notifier);
-	kfree(to_intel_connector(connector)->detect_edid);
-	drm_connector_cleanup(connector);
-	kfree(connector);
+
+	intel_connector_destroy(connector);
 }
 
 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {

drivers/gpu/drm/i915/intel_lvds.c

@@ -477,27 +477,6 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
 	return 1;
 }
 
-/**
- * intel_lvds_destroy - unregister and free LVDS structures
- * @connector: connector to free
- *
- * Unregister the DDC bus for this connector then free the driver private
- * structure.
- */
-static void intel_lvds_destroy(struct drm_connector *connector)
-{
-	struct intel_lvds_connector *lvds_connector =
-		to_lvds_connector(connector);
-
-	if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
-		kfree(lvds_connector->base.edid);
-
-	intel_panel_fini(&lvds_connector->base.panel);
-
-	drm_connector_cleanup(connector);
-	kfree(connector);
-}
-
 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
 	.get_modes = intel_lvds_get_modes,
 	.mode_valid = intel_lvds_mode_valid,
@@ -511,7 +490,7 @@ static const struct drm_connector_funcs intel_lvds_connector_funcs = {
 	.atomic_set_property = intel_digital_connector_atomic_set_property,
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
-	.destroy = intel_lvds_destroy,
+	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
 };

drivers/gpu/drm/i915/intel_sdvo.c

@@ -2058,14 +2058,6 @@ static int intel_sdvo_get_modes(struct drm_connector *connector)
 	return !list_empty(&connector->probed_modes);
 }
 
-static void intel_sdvo_destroy(struct drm_connector *connector)
-{
-	struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
-
-	drm_connector_cleanup(connector);
-	kfree(intel_sdvo_connector);
-}
-
 static int
 intel_sdvo_connector_atomic_get_property(struct drm_connector *connector,
 					 const struct drm_connector_state *state,
@@ -2228,7 +2220,7 @@ static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
 	.atomic_set_property = intel_sdvo_connector_atomic_set_property,
 	.late_register = intel_sdvo_connector_register,
 	.early_unregister = intel_sdvo_connector_unregister,
-	.destroy = intel_sdvo_destroy,
+	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = intel_sdvo_connector_duplicate_state,
 };
@@ -2583,7 +2575,7 @@ intel_sdvo_tv_init(struct intel_sdvo *intel_sdvo, int type)
 	return true;
 
 err:
-	intel_sdvo_destroy(connector);
+	intel_connector_destroy(connector);
 	return false;
 }
 
@@ -2675,7 +2667,7 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 	return true;
 
 err:
-	intel_sdvo_destroy(connector);
+	intel_connector_destroy(connector);
 	return false;
 }
 
@@ -2745,7 +2737,7 @@ static void intel_sdvo_output_cleanup(struct intel_sdvo *intel_sdvo)
 				 &dev->mode_config.connector_list, head) {
 		if (intel_attached_encoder(connector) == &intel_sdvo->base) {
 			drm_connector_unregister(connector);
-			intel_sdvo_destroy(connector);
+			intel_connector_destroy(connector);
 		}
 	}
 }

drivers/gpu/drm/i915/intel_tv.c

@@ -1377,17 +1377,10 @@ intel_tv_get_modes(struct drm_connector *connector)
 	return count;
 }
 
-static void
-intel_tv_destroy(struct drm_connector *connector)
-{
-	drm_connector_cleanup(connector);
-	kfree(connector);
-}
-
 static const struct drm_connector_funcs intel_tv_connector_funcs = {
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
-	.destroy = intel_tv_destroy,
+	.destroy = intel_connector_destroy,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,

drivers/gpu/drm/i915/vlv_dsi.c

@@ -1642,16 +1642,6 @@ static int intel_dsi_get_modes(struct drm_connector *connector)
 	return 1;
 }
 
-static void intel_dsi_connector_destroy(struct drm_connector *connector)
-{
-	struct intel_connector *intel_connector = to_intel_connector(connector);
-
-	DRM_DEBUG_KMS("\n");
-	intel_panel_fini(&intel_connector->panel);
-	drm_connector_cleanup(connector);
-	kfree(connector);
-}
-
 static void intel_dsi_encoder_destroy(struct drm_encoder *encoder)
 {
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
@@ -1676,7 +1666,7 @@ static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs
 static const struct drm_connector_funcs intel_dsi_connector_funcs = {
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
-	.destroy = intel_dsi_connector_destroy,
+	.destroy = intel_connector_destroy,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_get_property = intel_digital_connector_atomic_get_property,
 	.atomic_set_property = intel_digital_connector_atomic_set_property,