drm/edid: make drm_edid_to_eld() static

This is no longer needed outside of drm_edid.c.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/9c0be7b97d0144ed0419c87ac42b30f5835ca7e6.1509545641.git.jani.nikula@intel.com

drivers/gpu/drm/drm_edid.c

@@ -3841,7 +3841,7 @@ static void clear_eld(struct drm_connector *connector)
 	connector->audio_latency[1] = 0;
 }
 
-/**
+/*
  * drm_edid_to_eld - build ELD from EDID
  * @connector: connector corresponding to the HDMI/DP sink
  * @edid: EDID to parse
@@ -3849,7 +3849,7 @@ static void clear_eld(struct drm_connector *connector)
  * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. The
  * HDCP and Port_ID ELD fields are left for the graphics driver to fill in.
  */
-void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
+static void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 {
 	uint8_t *eld = connector->eld;
 	u8 *cea;
@@ -3934,7 +3934,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 	DRM_DEBUG_KMS("ELD size %d, SAD count %d\n",
 		      drm_eld_size(eld), total_sad_count);
 }
-EXPORT_SYMBOL(drm_edid_to_eld);
 
 /**
  * drm_edid_to_sad - extracts SADs from EDID

include/drm/drm_edid.h

@@ -333,7 +333,6 @@ struct drm_encoder;
 struct drm_connector;
 struct drm_display_mode;
 
-void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
 int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
 int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
 int drm_av_sync_delay(struct drm_connector *connector,

include/drm/drm_modeset_helper_vtables.h

@@ -801,9 +801,6 @@ struct drm_connector_helper_funcs {
 	 * resolution can call drm_add_modes_noedid(), and mark the preferred
 	 * one using drm_set_preferred_mode().
 	 *
-	 * Finally drivers that support audio probably want to update the ELD
-	 * data, too, using drm_edid_to_eld().
-	 *
 	 * This function is only called after the @detect hook has indicated
 	 * that a sink is connected and when the EDID isn't overridden through
 	 * sysfs or the kernel commandline.