drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

The internal LVDS encoders now have their own DT bindings. Before
switching the driver infrastructure to those new bindings, implement
backward-compatibility through live DT patching.

Patching is disabled and will be enabled along with support for the new
DT bindings in the DU driver.

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

1 files changed, 50 insertions, 0 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
new file mode 100644
index 000000000000..cb9da1f3942b
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7791.dts - Legacy LVDS DT bindings conversion for R8A7791
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7791-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};