drm/bridge: Drop drm_bridge_chain_mode_fixup

There are no users left of drm_bridge_chain_mode_fixup() and we
do not want to have this function available, so drop it.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531-bridge_chain_mode-v1-2-8b49e36c5dd3@ravnborg.org

drivers/gpu/drm/drm_bridge.c

@@ -467,43 +467,6 @@ void drm_bridge_detach(struct drm_bridge *bridge)
  *   needed, in order to gradually transition to the new model.
  */
 
-/**
- * drm_bridge_chain_mode_fixup - fixup proposed mode for all bridges in the
- *				 encoder chain
- * @bridge: bridge control structure
- * @mode: desired mode to be set for the bridge
- * @adjusted_mode: updated mode that works for this bridge
- *
- * Calls &drm_bridge_funcs.mode_fixup for all the bridges in the
- * encoder chain, starting from the first bridge to the last.
- *
- * Note: the bridge passed should be the one closest to the encoder
- *
- * RETURNS:
- * true on success, false on failure
- */
-bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
-				 const struct drm_display_mode *mode,
-				 struct drm_display_mode *adjusted_mode)
-{
-	struct drm_encoder *encoder;
-
-	if (!bridge)
-		return true;
-
-	encoder = bridge->encoder;
-	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
-		if (!bridge->funcs->mode_fixup)
-			continue;
-
-		if (!bridge->funcs->mode_fixup(bridge, mode, adjusted_mode))
-			return false;
-	}
-
-	return true;
-}
-EXPORT_SYMBOL(drm_bridge_chain_mode_fixup);
-
 /**
  * drm_bridge_chain_mode_valid - validate the mode against all bridges in the
  *				 encoder chain.

include/drm/drm_bridge.h

@@ -855,9 +855,6 @@ drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder)
 #define drm_for_each_bridge_in_chain(encoder, bridge)			\
 	list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node)
 
-bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
-				 const struct drm_display_mode *mode,
-				 struct drm_display_mode *adjusted_mode);
 enum drm_mode_status
 drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
 			    const struct drm_display_info *info,