drm/probe-helper: remove unused drm_connector_helper_get_modes_from_ddc()

Remove the unused drm_connector_helper_get_modes_from_ddc()
function. Most drivers should probably have this functionality split to
detect and get modes parts, so the helper is not the best abstraction.
Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/60eb6b2db16747d3f9c12604b197f33da585c16e.1704473654.git.jani.nikula@intel.com

drivers/gpu/drm/drm_probe_helper.c

@@ -1100,42 +1100,6 @@ enum drm_mode_status drm_crtc_helper_mode_valid_fixed(struct drm_crtc *crtc,
 }
 EXPORT_SYMBOL(drm_crtc_helper_mode_valid_fixed);
 
-/**
- * drm_connector_helper_get_modes_from_ddc - Updates the connector's EDID
- *                                           property from the connector's
- *                                           DDC channel
- * @connector: The connector
- *
- * Returns:
- * The number of detected display modes.
- *
- * Uses a connector's DDC channel to retrieve EDID data and update the
- * connector's EDID property and display modes. Drivers can use this
- * function to implement struct &drm_connector_helper_funcs.get_modes
- * for connectors with a DDC channel.
- */
-int drm_connector_helper_get_modes_from_ddc(struct drm_connector *connector)
-{
-	struct edid *edid;
-	int count = 0;
-
-	if (!connector->ddc)
-		return 0;
-
-	edid = drm_get_edid(connector, connector->ddc);
-
-	// clears property if EDID is NULL
-	drm_connector_update_edid_property(connector, edid);
-
-	if (edid) {
-		count = drm_add_edid_modes(connector, edid);
-		kfree(edid);
-	}
-
-	return count;
-}
-EXPORT_SYMBOL(drm_connector_helper_get_modes_from_ddc);
-
 /**
  * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector
  * @connector: the connector

include/drm/drm_probe_helper.h

@@ -32,7 +32,6 @@ enum drm_mode_status drm_crtc_helper_mode_valid_fixed(struct drm_crtc *crtc,
 						      const struct drm_display_mode *mode,
 						      const struct drm_display_mode *fixed_mode);
 
-int drm_connector_helper_get_modes_from_ddc(struct drm_connector *connector);
 int drm_connector_helper_get_modes_fixed(struct drm_connector *connector,
 					 const struct drm_display_mode *fixed_mode);
 int drm_connector_helper_get_modes(struct drm_connector *connector);