dtoverlays: Add 120fps mode to imx290 overlay

The driver has been updated to support 120fps over 4 data lanes
(ie CM4/Pi5/CM5 only), so add a "highfps" override to the overlay
to allow selection of this.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Author: 6by9

arch/arm/boot/dts/overlays/README

@@ -2796,6 +2796,8 @@ Params: 4lane                   Enable 4 CSI2 lanes. This requires a Compute
                                 configuring the sensor (default on)
         cam0                    Adopt the default configuration for CAM0 on a
                                 Compute Module (CSI0, i2c_vc, and cam0_reg).
+        highfps                 Enable 120fps mode. Requires 4 data lanes, and
+                                limits the sensor to 10bit readout.
 
 
 Name:   imx296
@@ -2840,6 +2842,9 @@ Params: 4lane                   Enable 4 CSI2 lanes. This requires a Compute
                                 configuring the sensor (default on)
         cam0                    Adopt the default configuration for CAM0 on a
                                 Compute Module (CSI0, i2c_vc, and cam0_reg).
+        highfps                 Enable 120fps mode. Invalid on this sensor
+                                variant, but the overlay shares portions with
+                                imx290 and imx462.
 
 
 Name:   imx335
@@ -2937,6 +2942,8 @@ Params: 4lane                   Enable 4 CSI2 lanes. This requires a Compute
                                 configuring the sensor (default on)
         cam0                    Adopt the default configuration for CAM0 on a
                                 Compute Module (CSI0, i2c_vc, and cam0_reg).
+        highfps                 Enable 120fps mode. Requires 4 data lanes, and
+                                limits the sensor to 10bit readout.
 
 
 Name:   imx477

arch/arm/boot/dts/overlays/imx290_327-overlay.dtsi

@@ -92,6 +92,15 @@
 		};
 	};
 
+	fragment@11 {
+		target = <&cam_endpoint>;
+		__dormant__ {
+			data-lanes = <1 2 3 4>;
+			link-frequencies =
+				/bits/ 64 <445500000 297000000>;
+		};
+	};
+
 	__overrides__ {
 		4lane = <0>, "-6+7-8+9";
 		clock-frequency = <&cam_clk>,"clock-frequency:0",
@@ -104,6 +113,7 @@
 		       <&clk_frag>, "target:0=",<&cam0_clk>,
 		       <&cam_node>, "clocks:0=",<&cam0_clk>,
 		       <&cam_node>, "vdda-supply:0=",<&cam0_reg>;
+		highfps = <0>, "-6+11-8+9";
 	};
 };