diff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp
index 3e135353..70bbd97a 100644
--- a/src/libcamera/camera_sensor.cpp
+++ b/src/libcamera/camera_sensor.cpp
@@ -319,11 +319,15 @@ void CameraSensor::initTestPatternModes(
 		return;
 	}
 
+	std::map<int32_t, int32_t> indexToTestPatternMode;
+	for (const auto& it : testPatternModes)
+		indexToTestPatternMode[it.second] = it.first;
+
 	for (const ControlValue &value : v4l2TestPattern->second.values()) {
 		const int32_t index = value.get<int32_t>();
 
-		const auto it = testPatternModes.find(index);
-		if (it == testPatternModes.end()) {
+		const auto it = indexToTestPatternMode.find(index);
+		if (it == indexToTestPatternMode.end()) {
 			LOG(CameraSensor, Debug)
 				<< "Test pattern mode " << index << " ignored";
 			continue;
diff --git a/src/libcamera/camera_sensor_properties.cpp b/src/libcamera/camera_sensor_properties.cpp
index f660743a..d0b2ae0e 100644
--- a/src/libcamera/camera_sensor_properties.cpp
+++ b/src/libcamera/camera_sensor_properties.cpp
@@ -38,9 +38,9 @@ LOG_DEFINE_CATEGORY(CameraSensorProperties)
  * \brief The physical size of a pixel, including pixel edges, in nanometers.
  *
  * \var CameraSensorProperties::testPatternModes
- * \brief Map that associates the indexes of the sensor test pattern modes as
- * returned by V4L2_CID_TEST_PATTERN with the corresponding TestPattern
- * control value
+ * \brief Map that associates the TestPattern control value with the indexes of
+ * the corresponding sensor test pattern modes as returned by
+ * V4L2_CID_TEST_PATTERN.
  */
 
 /**
@@ -55,11 +55,11 @@ const CameraSensorProperties *CameraSensorProperties::get(const std::string &sen
 		{ "imx219", {
 			.unitCellSize = { 1120, 1120 },
 			.testPatternModes = {
-				{ 0, controls::draft::TestPatternModeOff },
-				{ 1, controls::draft::TestPatternModeColorBars },
-				{ 2, controls::draft::TestPatternModeSolidColor },
-				{ 3, controls::draft::TestPatternModeColorBarsFadeToGray },
-				{ 4, controls::draft::TestPatternModePn9 },
+				{ controls::draft::TestPatternModeOff, 0 },
+				{ controls::draft::TestPatternModeColorBars, 1 },
+				{ controls::draft::TestPatternModeSolidColor, 2 },
+				{ controls::draft::TestPatternModeColorBarsFadeToGray, 3 },
+				{ controls::draft::TestPatternModePn9, 4 },
 			},
 		} },
 		{ "imx258", {
@@ -70,22 +70,22 @@ const CameraSensorProperties *CameraSensorProperties::get(const std::string &sen
 		{ "ov5670", {
 			.unitCellSize = { 1120, 1120 },
 			.testPatternModes = {
-				{ 0, controls::draft::TestPatternModeOff },
-				{ 1, controls::draft::TestPatternModeColorBars },
+				{ controls::draft::TestPatternModeOff, 0 },
+				{ controls::draft::TestPatternModeColorBars, 1 },
 			},
 		} },
 		{ "ov13858", {
 			.unitCellSize = { 1120, 1120 },
 			.testPatternModes =  {
-				{ 0, controls::draft::TestPatternModeOff },
-				{ 1, controls::draft::TestPatternModeColorBars },
+				{ controls::draft::TestPatternModeOff, 0 },
+				{ controls::draft::TestPatternModeColorBars, 1 },
 			},
 		} },
 		{ "ov5693", {
 			.unitCellSize = { 1400, 1400 },
 			.testPatternModes = {
-				{ 0, controls::draft::TestPatternModeOff },
-				{ 2, controls::draft::TestPatternModeColorBars },
+				{ controls::draft::TestPatternModeOff, 0 },
+				{ controls::draft::TestPatternModeColorBars, 2 },
 				/*
 				 * No corresponding test pattern mode for
 				 * 1: "Random data" and 3: "Colour Bars with