drm/bridge: remove ->get_edid callback

There are no more users of the ->get_edid callback left. They've all
been converted to ->edid_read. Remove the callback, and the fallback in
drm_bridge_edid_read().
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/34407a355ec6848fc44f8c30d245fcbc5687195e.1706038510.git.jani.nikula@intel.com

drivers/gpu/drm/drm_bridge.c

@@ -1216,9 +1216,6 @@ EXPORT_SYMBOL_GPL(drm_bridge_get_modes);
  * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.edid_read to get
  * the EDID and return it. Otherwise return NULL.
  *
- * If &drm_bridge_funcs.edid_read is not set, fall back to using
- * &drm_bridge_funcs.get_edid and wrapping it in struct drm_edid.
- *
  * RETURNS:
  * The retrieved EDID on success, or NULL otherwise.
  */
@@ -1228,22 +1225,6 @@ const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
 	if (!(bridge->ops & DRM_BRIDGE_OP_EDID))
 		return NULL;
 
-	/* Transitional: Fall back to ->get_edid. */
-	if (!bridge->funcs->edid_read) {
-		const struct drm_edid *drm_edid;
-		struct edid *edid;
-
-		edid = bridge->funcs->get_edid(bridge, connector);
-		if (!edid)
-			return NULL;
-
-		drm_edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH);
-
-		kfree(edid);
-
-		return drm_edid;
-	}
-
 	return bridge->funcs->edid_read(bridge, connector);
 }
 EXPORT_SYMBOL_GPL(drm_bridge_edid_read);

include/drm/drm_bridge.h

@@ -588,36 +588,6 @@ struct drm_bridge_funcs {
 	const struct drm_edid *(*edid_read)(struct drm_bridge *bridge,
 					    struct drm_connector *connector);
 
-	/**
-	 * @get_edid:
-	 *
-	 * Read and parse the EDID data of the connected display.
-	 *
-	 * The @get_edid callback is the preferred way of reporting mode
-	 * information for a display connected to the bridge output. Bridges
-	 * that support reading EDID shall implement this callback and leave
-	 * the @get_modes callback unimplemented.
-	 *
-	 * The caller of this operation shall first verify the output
-	 * connection status and refrain from reading EDID from a disconnected
-	 * output.
-	 *
-	 * This callback is optional. Bridges that implement it shall set the
-	 * DRM_BRIDGE_OP_EDID flag in their &drm_bridge->ops.
-	 *
-	 * The connector parameter shall be used for the sole purpose of EDID
-	 * retrieval and parsing, and shall not be stored internally by bridge
-	 * drivers for future usage.
-	 *
-	 * RETURNS:
-	 *
-	 * An edid structure newly allocated with kmalloc() (or similar) on
-	 * success, or NULL otherwise. The caller is responsible for freeing
-	 * the returned edid structure with kfree().
-	 */
-	struct edid *(*get_edid)(struct drm_bridge *bridge,
-				 struct drm_connector *connector);
-
 	/**
 	 * @hpd_notify:
 	 *