drm: rcar-du: Convert LVDS encoder code to bridge driver

The LVDS encoders used to be described in DT as part of the DU. They now
have their own DT node, linked to the DU using the OF graph bindings.
This allows moving internal LVDS encoder support to a separate driver
modelled as a DRM bridge. Backward compatibility is retained as legacy
DT is patched live to move to the new bindings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

1 files changed, 4 insertions, 10 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 566d1a9..0329b35 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -27,7 +27,6 @@
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvdsenc.h"
 #include "rcar_du_regs.h"
 #include "rcar_du_vsp.h"
 
@@ -341,11 +340,10 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
 	of_node_put(entity_ep_node);
 
 	if (!encoder) {
-		/*
-		 * If no encoder has been found the entity must be the
-		 * connector.
-		 */
-		connector = entity;
+		dev_warn(rcdu->dev,
+			 "no encoder found for endpoint %pOF, skipping\n",
+			 ep->local_node);
+		return -ENODEV;
 	}
 
 	ret = rcar_du_encoder_init(rcdu, output, encoder, connector);
@@ -595,10 +593,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 	}
 
 	/* Initialize the encoders. */
-	ret = rcar_du_lvdsenc_init(rcdu);
-	if (ret < 0)
-		return ret;
-
 	ret = rcar_du_encoders_init(rcdu);
 	if (ret < 0)
 		return ret;