test: dm: add video bridge tests

Add tests for video bridge ops.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 8029195..52e9ddb 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -1047,6 +1047,31 @@
 		};
 	};
 
+	lvds-encoder {
+		compatible = "lvds-encoder";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				bridge_input: endpoint {
+					/* link to output */
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				bridge_output: endpoint {
+					remote-endpoint = <&panel_input>;
+				};
+			};
+		};
+	};
+
 	wdt-gpio-toggle {
 		gpios = <&gpio_a 8 0>;
 		compatible = "linux,wdt-gpio";
@@ -1402,6 +1427,27 @@
 	panel {
 		compatible = "simple-panel";
 		backlight = <&backlight 0 100>;
+
+		display-timings {
+			timing@0 {
+				/* 1280x800@60Hz */
+				clock-frequency = <68000000>;
+				hactive = <1280>;
+				hfront-porch = <48>;
+				hback-porch = <18>;
+				hsync-len = <30>;
+				vactive = <800>;
+				vfront-porch = <3>;
+				vback-porch = <12>;
+				vsync-len = <5>;
+			};
+		};
+
+		port {
+			panel_input: endpoint {
+				remote-endpoint = <&bridge_output>;
+			};
+		};
 	};
 
 	scsi {