Kbingham/pi5/imx283 imx335

src/ipa/rpi/cam_helper/cam_helper_imx335.cpp

@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2023, Ideas on Board Oy.
+ *
+ * cam_helper_Imx335.cpp - camera information for Imx335 sensor
+ */
+
+#include <assert.h>
+
+#include "cam_helper.h"
+#include "math.h"
+using namespace RPiController;
+
+class CamHelperImx335 : public CamHelper
+{
+public:
+	CamHelperImx335();
+	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 = 9;
+	static constexpr uint32_t maxGainCode = 100;
+};
+
+/*
+ * Imx335 doesn't output metadata, so we have to use the "unicam parser" which
+ * works by counting frames.
+ */
+
+CamHelperImx335::CamHelperImx335()
+	: CamHelper({}, frameIntegrationDiff)
+{
+}
+
+uint32_t CamHelperImx335::gainCode(double gain) const
+{
+	/* Validate me:
+	 * The value which is 10/3 times the gain is set to register.
+	 * (0.3 dB step)
+	 * When set to 6 dB: 6 × 10/3 = 20d; GAIN [7:0] = 14h
+	 */
+	uint32_t code = 10 * std::log10(gain) * 10 / 3;
+	return std::min(code, maxGainCode);
+}
+
+double CamHelperImx335::gain(uint32_t gainCode) const
+{
+	return std::pow(10.0, gainCode / (10 * 10/3));
+}
+
+unsigned int CamHelperImx335::hideFramesModeSwitch() const
+{
+	/* After a mode switch, we seem to get 1 bad frame. */
+	return 1;
+}
+
+
+static CamHelper *create()
+{
+	return new CamHelperImx335();
+}
+
+static RegisterCamHelper reg("imx335", &create);

src/ipa/rpi/cam_helper/meson.build

@@ -7,6 +7,7 @@ rpi_ipa_cam_helper_sources = files([
     'cam_helper_imx283.cpp',
     'cam_helper_imx290.cpp',
     'cam_helper_imx296.cpp',
+    'cam_helper_imx335.cpp',
     'cam_helper_imx415.cpp',
     'cam_helper_imx477.cpp',
     'cam_helper_imx500.cpp',