diff --git a/include/libcamera/internal/camera_sensor.h b/include/libcamera/internal/camera_sensor.h
index 59a1604c..f6ef4df1 100644
--- a/include/libcamera/internal/camera_sensor.h
+++ b/include/libcamera/internal/camera_sensor.h
@@ -54,7 +54,7 @@ public:
 	virtual Size resolution() const = 0;
 
 	virtual V4L2SubdeviceFormat
-	getFormat(const std::vector<unsigned int> &mbusCodes,
+	getFormat(Span<const unsigned int> mbusCodes,
 		  const Size &size, const Size maxSize = Size()) const = 0;
 	virtual int setFormat(V4L2SubdeviceFormat *format,
 			      Transform transform = Transform::Identity) = 0;
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
index 8ea5500d..d318bea9 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
@@ -7,6 +7,8 @@
 
 #include "rkisp1_path.h"
 
+#include <array>
+
 #include <linux/media-bus-format.h>
 
 #include <libcamera/formats.h>
@@ -341,7 +343,7 @@ RkISP1Path::validate(const CameraSensor *sensor,
 					    : cfg->size;
 
 		V4L2SubdeviceFormat sensorFormat =
-			sensor->getFormat({ mbusCode }, rawSize);
+			sensor->getFormat(std::array{ mbusCode }, rawSize);
 
 		if (sensorConfig &&
 		    sensorConfig->outputSize != sensorFormat.size)
@@ -362,7 +364,7 @@ RkISP1Path::validate(const CameraSensor *sensor,
 
 		uint32_t mbusCode = formatToMediaBus.at(rawFormat);
 		V4L2SubdeviceFormat sensorFormat =
-			sensor->getFormat({ mbusCode }, sensorSize);
+			sensor->getFormat(std::array{ mbusCode }, sensorSize);
 
 		if (sensorFormat.size != sensorSize)
 			return CameraConfiguration::Invalid;
diff --git a/src/libcamera/sensor/camera_sensor_legacy.cpp b/src/libcamera/sensor/camera_sensor_legacy.cpp
index 0b0790ea..f9e685a9 100644
--- a/src/libcamera/sensor/camera_sensor_legacy.cpp
+++ b/src/libcamera/sensor/camera_sensor_legacy.cpp
@@ -73,7 +73,7 @@ public:
 	std::vector<Size> sizes(unsigned int mbusCode) const override;
 	Size resolution() const override;
 
-	V4L2SubdeviceFormat getFormat(const std::vector<unsigned int> &mbusCodes,
+	V4L2SubdeviceFormat getFormat(Span<const unsigned int> mbusCodes,
 				      const Size &size,
 				      const Size maxSize) const override;
 	int setFormat(V4L2SubdeviceFormat *format,
@@ -699,7 +699,7 @@ Size CameraSensorLegacy::resolution() const
 }
 
 V4L2SubdeviceFormat
-CameraSensorLegacy::getFormat(const std::vector<unsigned int> &mbusCodes,
+CameraSensorLegacy::getFormat(Span<const unsigned int> mbusCodes,
 			      const Size &size, Size maxSize) const
 {
 	unsigned int desiredArea = size.width * size.height;
diff --git a/src/libcamera/sensor/camera_sensor_raw.cpp b/src/libcamera/sensor/camera_sensor_raw.cpp
index b9e5b19a..8ea44236 100644
--- a/src/libcamera/sensor/camera_sensor_raw.cpp
+++ b/src/libcamera/sensor/camera_sensor_raw.cpp
@@ -74,7 +74,7 @@ public:
 	std::vector<Size> sizes(unsigned int mbusCode) const override;
 	Size resolution() const override;
 
-	V4L2SubdeviceFormat getFormat(const std::vector<unsigned int> &mbusCodes,
+	V4L2SubdeviceFormat getFormat(Span<const unsigned int> mbusCodes,
 				      const Size &size,
 				      const Size maxSize) const override;
 	int setFormat(V4L2SubdeviceFormat *format,
@@ -757,7 +757,7 @@ Size CameraSensorRaw::resolution() const
 }
 
 V4L2SubdeviceFormat
-CameraSensorRaw::getFormat(const std::vector<unsigned int> &mbusCodes,
+CameraSensorRaw::getFormat(Span<const unsigned int> mbusCodes,
 			   const Size &size, Size maxSize) const
 {
 	unsigned int desiredArea = size.width * size.height;
diff --git a/test/camera-sensor.cpp b/test/camera-sensor.cpp
index 869c7889..c30a2212 100644
--- a/test/camera-sensor.cpp
+++ b/test/camera-sensor.cpp
@@ -96,10 +96,13 @@ protected:
 		}
 
 		/* Use an invalid format and make sure it's not selected. */
-		V4L2SubdeviceFormat format = sensor_->getFormat({ 0xdeadbeef,
-								  MEDIA_BUS_FMT_SBGGR10_1X10,
-								  MEDIA_BUS_FMT_BGR888_1X24 },
-								Size(1024, 768));
+		static constexpr uint32_t mbusCodes[] = {
+			0xdeadbeef,
+			MEDIA_BUS_FMT_SBGGR10_1X10,
+			MEDIA_BUS_FMT_BGR888_1X24,
+		};
+
+		V4L2SubdeviceFormat format = sensor_->getFormat(mbusCodes, Size(1024, 768));
 		if (format.code != MEDIA_BUS_FMT_SBGGR10_1X10 ||
 		    format.size != Size(4096, 2160)) {
 			cerr << "Failed to get a suitable format, expected 4096x2160-0x"