drm: Remove drm_mode_create_dithering_property()

This was last used by nouveau, replaced by a driver-specific property
in:

  commit de69185573586302ada2e59ba41835df36986277
  Author: Ben Skeggs <bskeggs@redhat.com>
  Date:   Mon Oct 17 12:23:41 2011 +1000

      drm/nouveau: improve dithering properties, and implement proper auto mode

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 0 insertions, 31 deletions

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index a6917645fb4a..ffb791f95d45 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -125,13 +125,6 @@ static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
 };
 
-static const struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
-{
-        { DRM_MODE_DITHERING_OFF, "Off" },
-        { DRM_MODE_DITHERING_ON, "On" },
-        { DRM_MODE_DITHERING_AUTO, "Automatic" },
-};
-
 /*
  * Non-global properties, but "required" for certain connectors.
  */
@@ -1161,30 +1154,6 @@ int drm_mode_create_scaling_mode_property(struct drm_device *dev)
 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
 
 /**
- * drm_mode_create_dithering_property - create dithering property
- * @dev: DRM device
- *
- * Called by a driver the first time it's needed, must be attached to desired
- * connectors.
- */
-int drm_mode_create_dithering_property(struct drm_device *dev)
-{
-        struct drm_property *dithering_mode;
-
-        if (dev->mode_config.dithering_mode_property)
-                return 0;
-
-        dithering_mode =
-                drm_property_create_enum(dev, 0, "dithering",
-                                drm_dithering_mode_enum_list,
-                                    ARRAY_SIZE(drm_dithering_mode_enum_list));
-        dev->mode_config.dithering_mode_property = dithering_mode;
-
-        return 0;
-}
-EXPORT_SYMBOL(drm_mode_create_dithering_property);
-
-/**
  * drm_mode_create_dirty_property - create dirty property
  * @dev: DRM device
  *