add support for mira220 image sensor

src/ipa/libipa/camera_sensor_helper.cpp

@@ -567,6 +567,12 @@ class CameraSensorHelperImx296 : public CameraSensorHelper
 };
 REGISTER_CAMERA_SENSOR_HELPER("imx296", CameraSensorHelperImx296)
 
+class CameraSensorHelperMira220 : public CameraSensorHelper
+{
+};
+REGISTER_CAMERA_SENSOR_HELPER("mira220", CameraSensorHelperMira220)
+
+
 class CameraSensorHelperImx327 : public CameraSensorHelperImx290
 {
 };

src/ipa/rpi/cam_helper/cam_helper_mira220.cpp

@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2024, Raspberry Pi Ltd
+ *
+ * cam_helper_Mira220.cpp - camera information for Mira220 sensor
+ */
+
+ #include <assert.h>
+
+ #include "cam_helper.h"
+
+ using namespace RPiController;
+
+ class CamHelperMira220 : public CamHelper
+ {
+ public:
+	 CamHelperMira220();
+	 uint32_t gainCode(double gain) const override;
+	 double gain(uint32_t gainCode) const override;
+	 unsigned int hideFramesModeSwitch() const override;
+
+ private:
+	 /*
+	  * Smallest difference between the frame length and integration time,
+	  * in units of lines.
+	  */
+	 static constexpr int frameIntegrationDiff = 4;
+ };
+
+ /*
+  * Mira220 doesn't output metadata, so we have to use the delayed controls which
+  * works by counting frames.
+  */
+
+ CamHelperMira220::CamHelperMira220()
+	 : CamHelper({}, frameIntegrationDiff)
+ {
+ }
+
+ uint32_t CamHelperMira220::gainCode(double gain) const
+ {
+	 return static_cast<uint32_t>(2048.0 - 2048.0 / gain);
+ }
+
+ double CamHelperMira220::gain(uint32_t gainCode) const
+ {
+	 return static_cast<double>(2048.0 / (2048 - gainCode));
+ }
+
+ unsigned int CamHelperMira220::hideFramesModeSwitch() const
+ {
+	 /* After a mode switch, we seem to get 1 bad frame. */
+	 return 1;
+ }
+
+ static CamHelper *create()
+ {
+	 return new CamHelperMira220();
+ }
+
+ static RegisterCamHelper reg("mira220", &create);
+

src/ipa/rpi/cam_helper/meson.build

@@ -3,6 +3,7 @@
 rpi_ipa_cam_helper_sources = files([
     'cam_helper.cpp',
     'cam_helper_ov5647.cpp',
+    'cam_helper_mira220.cpp',
     'cam_helper_imx219.cpp',
     'cam_helper_imx283.cpp',
     'cam_helper_imx290.cpp',

src/ipa/rpi/pisp/data/meson.build

@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: CC0-1.0
 
 conf_files = files([
+    'mira220.json',
+    'mira220_mono.json',
     'imx219.json',
     'imx219_noir.json',
     'imx290.json',