libcamera: libipa: camera_sensor: Add Sony IMX415 sensor properties

Provide the Sony IMX415 camera sensor properties and registration
with libipa for the gain code helpers.

The test patterns exposed by the IMX415 do not map well to the current
set of test pattern controls supplied by libcamera. These are left
intentionally unimplemented.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/libipa/camera_sensor_helper.cpp

@@ -466,6 +466,17 @@ public:
 };
 REGISTER_CAMERA_SENSOR_HELPER("imx335", CameraSensorHelperImx335)
 
+class CameraSensorHelperImx415 : public CameraSensorHelper
+{
+public:
+	CameraSensorHelperImx415()
+	{
+		gainType_ = AnalogueGainExponential;
+		gainConstants_.exp = { 1.0, expGainDb(0.3) };
+	}
+};
+REGISTER_CAMERA_SENSOR_HELPER("imx415", CameraSensorHelperImx415)
+
 class CameraSensorHelperImx477 : public CameraSensorHelper
 {
 public:

src/libcamera/sensor/camera_sensor_properties.cpp

@@ -119,6 +119,10 @@ const CameraSensorProperties *CameraSensorProperties::get(const std::string &sen
 			.unitCellSize = { 2000, 2000 },
 			.testPatternModes = {},
 		} },
+		{ "imx415", {
+			.unitCellSize = { 1450, 1450 },
+			.testPatternModes = {},
+		} },
 		{ "imx477", {
 			.unitCellSize = { 1550, 1550 },
 			.testPatternModes = {},