libcamera: libipa: camera_sensor: Add GalaxyCore gc05a2 sensor properties

Provide the GalaxyCore gc05a2 camera sensor properties and registration
with libipa for the gain code helpers.

Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org>
Co-developed-by: Xing Gu <xinggu@chromium.org>
Signed-off-by: Xing Gu <xinggu@chromium.org>
Co-developed-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Signed-off-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Co-developed-by: Harvey Yang <chenghaoyang@chromium.org>
Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/libipa/camera_sensor_helper.cpp

@@ -519,6 +519,19 @@ private:
 };
 REGISTER_CAMERA_SENSOR_HELPER("ar0521", CameraSensorHelperAr0521)
 
+class CameraSensorHelperGc05a2 : public CameraSensorHelper
+{
+public:
+	CameraSensorHelperGc05a2()
+	{
+		/* From datasheet: 64 at 10bits. */
+		blackLevel_ = 4096;
+		gainType_ = AnalogueGainLinear;
+		gainConstants_.linear = { 100, 0, 0, 1024 };
+	}
+};
+REGISTER_CAMERA_SENSOR_HELPER("gc05a2", CameraSensorHelperGc05a2)
+
 class CameraSensorHelperImx214 : public CameraSensorHelper
 {
 public:

src/libcamera/sensor/camera_sensor_properties.cpp

@@ -106,6 +106,19 @@ const CameraSensorProperties *CameraSensorProperties::get(const std::string &sen
 			},
 			.sensorDelays = { },
 		} },
+		{ "gc05a2", {
+			.unitCellSize = { 1120, 1120 },
+			.testPatternModes = {
+				{ controls::draft::TestPatternModeOff, 0 },
+				{ controls::draft::TestPatternModeColorBars, 1 },
+			},
+			.sensorDelays = {
+				.exposureDelay = 2,
+				.gainDelay = 2,
+				.vblankDelay = 2,
+				.hblankDelay = 2
+			},
+		} },
 		{ "hi846", {
 			.unitCellSize = { 1120, 1120 },
 			.testPatternModes = {