diff --git a/arch/arm/boot/dts/broadcom/bcm270x-rpi.dtsi b/arch/arm/boot/dts/broadcom/bcm270x-rpi.dtsi
index 360fb05fe80ed8..1d45fba0b3928b 100644
--- a/arch/arm/boot/dts/broadcom/bcm270x-rpi.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm270x-rpi.dtsi
@@ -97,6 +97,19 @@
 		drm_fb0_vc4 = <&aliases>, "drm-fb0=",&vc4;
 		drm_fb1_vc4 = <&aliases>, "drm-fb1=",&vc4;
 		drm_fb2_vc4 = <&aliases>, "drm-fb2=",&vc4;
+
+		cam1_sync = <&csi1>, "sync-gpios:0=", <&gpio>,
+			    <&csi1>, "sync-gpios:4",
+			    <&csi1>, "sync-gpios:8=0", <GPIO_ACTIVE_HIGH>;
+		cam1_sync_inverted = <&csi1>, "sync-gpios:0=", <&gpio>,
+			    <&csi1>, "sync-gpios:4",
+			    <&csi1>, "sync-gpios:8=0", <GPIO_ACTIVE_LOW>;
+		cam0_sync = <&csi0>, "sync-gpios:0=", <&gpio>,
+			    <&csi0>, "sync-gpios:4",
+			    <&csi0>, "sync-gpios:8=0", <GPIO_ACTIVE_HIGH>;
+		cam0_sync_inverted = <&csi0>, "sync-gpios:0=", <&gpio>,
+			    <&csi0>, "sync-gpios:4",
+			    <&csi0>, "sync-gpios:8=0", <GPIO_ACTIVE_LOW>;
 	};
 };
 
diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index 7f5fb70ec0ca09..65f7a8ea2f26bd 100644
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -170,6 +170,18 @@ Params:
                                 Default of GPIO expander 5 on CM4, but override
                                 switches to normal GPIO.
 
+        cam0_sync               Enable a GPIO to reflect frame sync from CSI0,
+                                going high on frame start, and low on frame end.
+
+        cam0_sync_inverted      Enable a GPIO to reflect frame sync from CSI0
+                                going low on frame start, and high on frame end.
+
+        cam1_sync               Enable a GPIO to reflect frame sync from CSI1,
+                                going high on frame start, and low on frame end.
+
+        cam1_sync_inverted      Enable a GPIO to reflect frame sync from CSI1
+                                going low on frame start, and high on frame end.
+
         cooling_fan             Enables the Pi 5 cooling fan (enabled
                                 automatically by the firmware)
 
diff --git a/drivers/media/platform/bcm2835/bcm2835-unicam.c b/drivers/media/platform/bcm2835/bcm2835-unicam.c
index 65f66327c04f4a..a6ad0c0fbef64a 100644
--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
@@ -49,6 +49,7 @@
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/err.h>
+#include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -543,6 +544,8 @@ struct unicam_device {
 	struct v4l2_device v4l2_dev;
 	struct media_device mdev;
 
+	struct gpio_desc *sync_gpio;
+
 	/* parent device */
 	struct platform_device *pdev;
 	/* subdevice async Notifier */
@@ -943,6 +946,8 @@ static irqreturn_t unicam_isr(int irq, void *dev)
 	if (fe) {
 		bool inc_seq = unicam->frame_started;
 
+		if (unicam->sync_gpio)
+			gpiod_set_value(unicam->sync_gpio, 0);
 		/*
 		 * Ensure we have swapped buffers already as we can't
 		 * stop the peripheral. If no buffer is available, use a
@@ -1003,6 +1008,10 @@ static irqreturn_t unicam_isr(int irq, void *dev)
 		 * aka frame start.
 		 */
 		ts = ktime_get_ns();
+
+		if (unicam->sync_gpio)
+			gpiod_set_value(unicam->sync_gpio, 1);
+
 		for (i = 0; i < ARRAY_SIZE(unicam->node); i++) {
 			if (!unicam->node[i].streaming)
 				continue;
@@ -3407,6 +3416,9 @@ static int unicam_probe(struct platform_device *pdev)
 		goto err_unicam_put;
 	}
 
+	unicam->sync_gpio = devm_gpiod_get_optional(&pdev->dev, "sync",
+						    GPIOD_OUT_LOW);
+
 	ret = platform_get_irq(pdev, 0);
 	if (ret <= 0) {
 		dev_err(&pdev->dev, "No IRQ resource\n");