[{"id":39749,"web_url":"https://patchwork.libcamera.org/comment/39749/","msgid":"<91bddaa5-1ce8-4a98-b631-03f60bfc2d72@collabora.com>","date":"2026-07-17T15:35:13","subject":"Re: [PATCH v1 2/2] ipa: rpi: Add support for Sony IMX355","submitter":{"id":140,"url":"https://patchwork.libcamera.org/api/people/140/","name":"Robert Mader","email":"robert.mader@collabora.com"},"content":"Hi! I tested the CCMs with the simple pipeline / softISP and it looks \npretty good. Probably not enough for an TB, though :)\n\nOn 17.07.26 15:42, Naushir Patuck wrote:\n> This includes the RPi camera helper and pisp/vc4 tuning files.\n>\n> Signed-off-by: Naushir Patuck \n> ---\n> src/ipa/rpi/cam_helper/cam_helper_imx355.cpp | 69 +\n> src/ipa/rpi/cam_helper/meson.build | 1 +\n> src/ipa/rpi/pisp/data/imx355.json | 1233 ++++++++++++++++++\n> src/ipa/rpi/pisp/data/meson.build | 1 +\n> src/ipa/rpi/vc4/data/imx355.json | 416 ++++++\n> 5 files changed, 1720 insertions(+)\n> create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> create mode 100644 src/ipa/rpi/pisp/data/imx355.json\n> create mode 100644 src/ipa/rpi/vc4/data/imx355.json\n>\n> diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> new file mode 100644\n> index 000000000000..00e5fc836433\n> --- /dev/null\n> +++ b/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> @@ -0,0 +1,69 @@\n> +/* SPDX-License-Identifier: BSD-2-Clause */\n> +/*\n> + * Copyright (C) 2026, Raspberry Pi Ltd\n> + *\n> + * camera helper for imx355 sensor\n> + */\n> +\n> +#include \n> +#include \n> +#include \n> +#include \n> +\n> +#include \"cam_helper.h\"\n> +\n> +using namespace RPiController;\n> +\n> +class CamHelperImx355 : public CamHelper\n> +{\n> +public:\n> +\tCamHelperImx355();\n> +\tuint32_t gainCode(double gain) const override;\n> +\tdouble gain(uint32_t gainCode) const override;\n> +\tunsigned int mistrustFramesModeSwitch() const override;\n> +\tbool sensorEmbeddedDataPresent() const override;\n> +\n> +private:\n> +\t/*\n> +\t * Smallest difference between the frame length and integration time,\n> +\t * in units of lines.\n> +\t */\n> +\tstatic constexpr int frameIntegrationDiff = 4;\n> +};\n> +\n> +CamHelperImx355::CamHelperImx355()\n> +\t: CamHelper({}, frameIntegrationDiff)\n> +{\n> +}\n> +\n> +uint32_t CamHelperImx355::gainCode(double gain) const\n> +{\n> +\treturn (uint32_t)(1024 - 1024 / gain);\n> +}\n> +\n> +double CamHelperImx355::gain(uint32_t gainCode) const\n> +{\n> +\treturn 1024.0 / (1024 - gainCode);\n> +}\n> +\n> +unsigned int CamHelperImx355::mistrustFramesModeSwitch() const\n> +{\n> +\t/*\n> +\t * For reasons unknown, we do occasionally get a bogus metadata frame\n> +\t * at a mode switch (though not at start-up). Possibly warrants some\n> +\t * investigation, though not a big deal.\n> +\t */\n> +\treturn 1;\n> +}\n> +\n> +bool CamHelperImx355::sensorEmbeddedDataPresent() const\n> +{\n> +\treturn 0;\n> +}\n> +\n> +static CamHelper *create()\n> +{\n> +\treturn new CamHelperImx355();\n> +}\n> +\n> +static RegisterCamHelper reg(\"imx355\", &create);\n> diff --git a/src/ipa/rpi/cam_helper/meson.build b/src/ipa/rpi/cam_helper/meson.build\n> index eabd55dce5a1..0aa8c3dc2e2f 100644\n> --- a/src/ipa/rpi/cam_helper/meson.build\n> +++ b/src/ipa/rpi/cam_helper/meson.build\n> @@ -7,6 +7,7 @@ rpi_ipa_cam_helper_sources = files([\n> 'cam_helper_imx283.cpp',\n> 'cam_helper_imx290.cpp',\n> 'cam_helper_imx296.cpp',\n> + 'cam_helper_imx355.cpp',\n> 'cam_helper_imx415.cpp',\n> 'cam_helper_imx477.cpp',\n> 'cam_helper_imx519.cpp',\n> diff --git a/src/ipa/rpi/pisp/data/imx355.json b/src/ipa/rpi/pisp/data/imx355.json\n> new file mode 100644\n> index 000000000000..ce02340f4840\n> --- /dev/null\n> +++ b/src/ipa/rpi/pisp/data/imx355.json\n> @@ -0,0 +1,1233 @@\n> +{\n> + \"version\": 2.0,\n> + \"target\": \"pisp\",\n> + \"algorithms\": [\n> + {\n> + \"rpi.black_level\":\n> + {\n> + \"black_level\": 4096\n> + }\n> + },\n> + {\n> + \"rpi.lux\":\n> + {\n> + \"reference_shutter_speed\": 15151,\n> + \"reference_gain\": 1.5,\n> + \"reference_aperture\": 1.0,\n> + \"reference_lux\": 920,\n> + \"reference_Y\": 8539\n> + }\n> + },\n> + {\n> + \"rpi.dpc\":\n> + {\n> + \"strength\": 1\n> + }\n> + },\n> + {\n> + \"rpi.noise\":\n> + {\n> + \"reference_constant\": 23,\n> + \"reference_slope\": 5.041\n> + }\n> + },\n> + {\n> + \"rpi.geq\":\n> + {\n> + \"offset\": 104,\n> + \"slope\": 0.01695\n> + }\n> + },\n> + {\n> + \"rpi.denoise\":\n> + {\n> + \"normal\":\n> + {\n> + \"sdn\":\n> + {\n> + \"deviation\": 0.6,\n> + \"strength\": 0.95,\n> + \"deviation2\": 3.2,\n> + \"deviation_no_tdn\": 3.2,\n> + \"strength_no_tdn\": 0.95\n> + },\n> + \"cdn\":\n> + {\n> + \"deviation\": 200,\n> + \"strength\": 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15225,\n> + 4608, 16566,\n> + 5120, 17899,\n> + 5632, 19221,\n> + 6144, 20534,\n> + 6656, 21684,\n> + 7168, 22826,\n> + 7680, 24024,\n> + 8192, 25212,\n> + 9216, 27251,\n> + 10240, 29167,\n> + 11264, 30947,\n> + 12288, 32696,\n> + 13312, 34309,\n> + 14336, 35849,\n> + 15360, 37194,\n> + 16384, 38445,\n> + 17408, 39598,\n> + 18432, 40732,\n> + 19456, 41717,\n> + 20480, 42687,\n> + 22528, 44343,\n> + 24576, 45871,\n> + 26624, 47222,\n> + 28672, 48441,\n> + 30720, 49460,\n> + 32768, 50470,\n> + 34816, 51476,\n> + 36864, 52480,\n> + 38912, 53382,\n> + 40960, 54294,\n> + 43008, 55155,\n> + 45056, 56035,\n> + 47104, 56920,\n> + 49152, 57824,\n> + 51200, 58737,\n> + 53248, 59666,\n> + 55296, 60604,\n> + 57344, 61558,\n> + 59392, 62529,\n> + 61440, 63516,\n> + 63488, 64519,\n> + 65535, 65535\n> + ]\n> + }\n> + },\n> + {\n> + \"rpi.ccm\":\n> + {\n> + \"ccms\": [\n> + {\n> + \"ct\": 2920,\n> + \"ccm\":\n> + [\n> + 1.70668, -0.26633, -0.44035,\n> + -0.66386, 2.27239, -0.60854,\n> + -0.15809, -0.89221, 2.05029\n> + ]\n> + },\n> + {\n> + \"ct\": 3630,\n> + \"ccm\":\n> + [\n> + 1.81653, -0.46488, -0.35165,\n> + -0.59281, 2.14391, -0.55111,\n> + -0.12826, -0.73626, 1.86451\n> + ]\n> + },\n> + {\n> + \"ct\": 4550,\n> + \"ccm\":\n> + [\n> + 1.81131, -0.47745, -0.33385,\n> + -0.52168, 2.23595, -0.71427,\n> + -0.11785, -0.64358, 1.76143\n> + ]\n> + },\n> + {\n> + \"ct\": 5580,\n> + \"ccm\":\n> + [\n> + 1.85414, -0.53316, -0.32097,\n> + -0.46403, 2.08577, -0.62175,\n> + -0.12085, -0.56175, 1.68259\n> + ]\n> + }\n> + ]\n> + }\n> + },\n> + {\n> + \"rpi.cac\": { }\n> + },\n> + {\n> + \"rpi.sharpen\":\n> + {\n> + \"threshold\": 0.75,\n> + \"limit\": 0.5,\n> + \"strength\": 1.0\n> + }\n> + },\n> + {\n> + \"rpi.hdr\":\n> + {\n> + \"Off\":\n> + {\n> + \"cadence\": [ 0 ]\n> + },\n> + \"MultiExposureUnmerged\":\n> + {\n> + \"cadence\": [ 1, 2 ],\n> + \"channel_map\":\n> + {\n> + \"short\": 1,\n> + \"long\": 2\n> + }\n> + },\n> + \"SingleExposure\":\n> + {\n> + \"cadence\": [ 1 ],\n> + \"channel_map\":\n> + {\n> + \"short\": 1\n> + },\n> + \"spatial_gain\": 2.0,\n> + \"tonemap_enable\": 1\n> + },\n> + \"MultiExposure\":\n> + {\n> + \"cadence\": [ 1, 2 ],\n> + \"channel_map\":\n> + {\n> + \"short\": 1,\n> + \"long\": 2\n> + },\n> + \"stitch_enable\": 1,\n> + \"spatial_gain\": 2.0,\n> + \"tonemap_enable\": 1\n> + },\n> + \"Night\":\n> + {\n> + \"cadence\": [ 3 ],\n> + \"channel_map\":\n> + {\n> + \"night\": 3\n> + },\n> + \"tonemap_enable\": 1,\n> + \"tonemap\":\n> + [\n> + 0, 0,\n> + 5000, 20000,\n> + 10000, 30000,\n> + 20000, 47000,\n> + 30000, 55000,\n> + 65535, 65535\n> + ]\n> + }\n> + }\n> + },\n> + {\n> + \"rpi.sync\": { }\n> + }\n> + ]\n> +}\n> \\ No newline at end of file\n> diff --git a/src/ipa/rpi/pisp/data/meson.build b/src/ipa/rpi/pisp/data/meson.build\n> index 5c629bdc7131..a59e9d1854e1 100644\n> --- a/src/ipa/rpi/pisp/data/meson.build\n> +++ b/src/ipa/rpi/pisp/data/meson.build\n> @@ -8,6 +8,7 @@ conf_files = files([\n> 'imx296.json',\n> 'imx296_mono.json',\n> 'imx335.json',\n> + 'imx355.json',\n> 'imx378.json',\n> 'imx415.json',\n> 'imx415_b0569.json',\n> diff --git a/src/ipa/rpi/vc4/data/imx355.json b/src/ipa/rpi/vc4/data/imx355.json\n> new file mode 100644\n> index 000000000000..ba5bbc3592d5\n> --- /dev/null\n> +++ b/src/ipa/rpi/vc4/data/imx355.json\n> @@ -0,0 +1,416 @@\n> +{\n> + \"version\": 2.0,\n> + \"target\": \"bcm2835\",\n> + \"algorithms\": [\n> + {\n> + \"rpi.black_level\":\n> + {\n> + \"black_level\": 4096\n> + }\n> + },\n> + {\n> + \"rpi.dpc\": { }\n> + },\n> + {\n> + \"rpi.lux\":\n> + {\n> + \"reference_shutter_speed\": 15151,\n> + \"reference_gain\": 1.5,\n> + \"reference_aperture\": 1.0,\n> + \"reference_lux\": 920,\n> + \"reference_Y\": 8539\n> + }\n> + },\n> + {\n> + \"rpi.noise\":\n> + {\n> + \"reference_constant\": 23,\n> + \"reference_slope\": 5.041\n> + }\n> + },\n> + {\n> + \"rpi.geq\":\n> + {\n> + \"offset\": 104,\n> + \"slope\": 0.01695\n> + }\n> + },\n> + {\n> + \"rpi.sdn\": { }\n> + },\n> + {\n> + \"rpi.awb\":\n> + {\n> + \"priors\": [\n> + {\n> + \"lux\": 0,\n> + \"prior\":\n> + [\n> + 2000, 1.0,\n> + 3000, 0.0,\n> + 13000, 0.0\n> + ]\n> + },\n> + {\n> + \"lux\": 800,\n> + \"prior\":\n> + [\n> + 2000, 0.0,\n> + 6000, 2.0,\n> + 13000, 2.0\n> + ]\n> + },\n> + {\n> + \"lux\": 1500,\n> + \"prior\":\n> + [\n> + 2000, 0.0,\n> + 4000, 1.0,\n> + 6000, 6.0,\n> + 6500, 7.0,\n> + 7000, 1.0,\n> + 13000, 1.0\n> + ]\n> + }\n> + ],\n> + \"modes\":\n> + {\n> + \"auto\":\n> + {\n> + \"lo\": 2920.0,\n> + \"hi\": 5580.0\n> + },\n> + \"incandescent\":\n> + {\n> + \"lo\": 2920.0,\n> + \"hi\": 3000\n> + },\n> + \"tungsten\":\n> + {\n> + \"lo\": 3000,\n> + \"hi\": 3500\n> + },\n> + \"fluorescent\":\n> + {\n> + \"lo\": 4000,\n> + \"hi\": 4700\n> + },\n> + \"indoor\":\n> + {\n> + \"lo\": 3000,\n> + \"hi\": 5000\n> + },\n> + \"daylight\":\n> + {\n> + \"lo\": 5500,\n> + \"hi\": 5580.0\n> + },\n> + \"cloudy\":\n> + {\n> + \"lo\": 5580.0,\n> + \"hi\": 5580.0\n> + }\n> + },\n> + \"bayes\": 1,\n> + \"ct_curve\":\n> + [\n> + 2920.0, 0.8302, 0.4567,\n> + 3630.0, 0.7135, 0.5308,\n> + 4550.0, 0.5662, 0.6699,\n> + 5580.0, 0.5343, 0.7087\n> + ],\n> + \"sensitivity_r\": 1.0,\n> + \"sensitivity_b\": 1.0,\n> + \"transverse_pos\": 0.01,\n> + \"transverse_neg\": 0.01\n> + }\n> + },\n> + {\n> + \"rpi.agc\":\n> + {\n> + \"metering_modes\":\n> + {\n> + \"centre-weighted\":\n> + {\n> + \"weights\":\n> + [\n> + 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0\n> + ]\n> + },\n> + \"spot\":\n> + {\n> + \"weights\":\n> + [\n> + 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0\n> + ]\n> + },\n> + \"matrix\":\n> + {\n> + \"weights\":\n> + [\n> + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1\n> + ]\n> + }\n> + },\n> + \"exposure_modes\":\n> + {\n> + \"normal\":\n> + {\n> + \"shutter\": [ 100, 10000, 30000, 60000, 66666 ],\n> + \"gain\": [ 1.0, 2.0, 4.0, 6.0, 8.0 ]\n> + },\n> + \"short\":\n> + {\n> + \"shutter\": [ 100, 5000, 10000, 20000, 66666 ],\n> + \"gain\": [ 1.0, 2.0, 4.0, 6.0, 8.0 ]\n> + },\n> + \"long\":\n> + {\n> + \"shutter\": [ 100, 10000, 30000, 60000, 120000 ],\n> + \"gain\": [ 1.0, 2.0, 4.0, 6.0, 8.0 ]\n> + }\n> + },\n> + \"constraint_modes\":\n> + {\n> + \"normal\": [\n> + {\n> + \"bound\": \"LOWER\",\n> + \"q_lo\": 0.98,\n> + \"q_hi\": 1.0,\n> + \"y_target\":\n> + [\n> + 0, 0.5,\n> + 1000, 0.5\n> + ]\n> + }\n> + ],\n> + \"highlight\": [\n> + {\n> + \"bound\": \"LOWER\",\n> + \"q_lo\": 0.98,\n> + \"q_hi\": 1.0,\n> + \"y_target\":\n> + [\n> + 0, 0.5,\n> + 1000, 0.5\n> + ]\n> + },\n> + {\n> + \"bound\": \"UPPER\",\n> + \"q_lo\": 0.98,\n> + \"q_hi\": 1.0,\n> + \"y_target\":\n> + [\n> + 0, 0.8,\n> + 1000, 0.8\n> + ]\n> + }\n> + ]\n> + },\n> + \"y_target\":\n> + [\n> + 0, 0.16,\n> + 1000, 0.165,\n> + 10000, 0.17\n> + ]\n> + }\n> + },\n> + {\n> + \"rpi.alsc\":\n> + {\n> + \"omega\": 1.3,\n> + \"n_iter\": 100,\n> + \"luminance_strength\": 0.8,\n> + \"calibrations_Cr\": [\n> + {\n> + \"ct\": 2900,\n> + \"table\":\n> + [\n> + 1.546, 1.546, 1.513, 1.438, 1.347, 1.297, 1.289, 1.289, 1.289, 1.305, 1.373, 1.456, 1.512, 1.513, 1.494, 1.486,\n> + 1.546, 1.516, 1.445, 1.359, 1.269, 1.214, 1.184, 1.184, 1.193, 1.234, 1.296, 1.391, 1.461, 1.512, 1.507, 1.494,\n> + 1.517, 1.464, 1.359, 1.269, 1.195, 1.122, 1.093, 1.093, 1.104, 1.144, 1.231, 1.296, 1.391, 1.481, 1.509, 1.511,\n> + 1.494, 1.415, 1.301, 1.195, 1.122, 1.076, 1.033, 1.033, 1.046, 1.104, 1.144, 1.231, 1.337, 1.443, 1.502, 1.511,\n> + 1.485, 1.382, 1.261, 1.156, 1.076, 1.033, 1.015, 1.002, 1.028, 1.046, 1.107, 1.194, 1.302, 1.415, 1.495, 1.506,\n> + 1.485, 1.376, 1.257, 1.153, 1.073, 1.024, 1.001, 1.001, 1.009, 1.044, 1.103, 1.191, 1.297, 1.409, 1.491, 1.498,\n> + 1.485, 1.376, 1.257, 1.153, 1.073, 1.027, 1.015, 1.002, 1.023, 1.044, 1.103, 1.191, 1.297, 1.409, 1.491, 1.499,\n> + 1.489, 1.407, 1.292, 1.188, 1.111, 1.073, 1.027, 1.027, 1.044, 1.092, 1.135, 1.223, 1.328, 1.432, 1.492, 1.498,\n> + 1.507, 1.451, 1.349, 1.251, 1.188, 1.111, 1.082, 1.082, 1.092, 1.135, 1.212, 1.279, 1.377, 1.467, 1.498, 1.499,\n> + 1.529, 1.498, 1.417, 1.347, 1.251, 1.195, 1.164, 1.164, 1.173, 1.212, 1.279, 1.364, 1.437, 1.487, 1.493, 1.484,\n> + 1.527, 1.508, 1.483, 1.415, 1.348, 1.297, 1.267, 1.267, 1.275, 1.311, 1.362, 1.429, 1.487, 1.496, 1.485, 1.451,\n> + 1.525, 1.508, 1.507, 1.458, 1.401, 1.348, 1.314, 1.314, 1.314, 1.362, 1.409, 1.464, 1.498, 1.499, 1.451, 1.439\n> + ]\n> + },\n> + {\n> + \"ct\": 5900,\n> + \"table\":\n> + [\n> + 1.451, 1.449, 1.415, 1.349, 1.276, 1.239, 1.234, 1.234, 1.234, 1.248, 1.305, 1.373, 1.424, 1.425, 1.425, 1.419,\n> + 1.449, 1.416, 1.359, 1.285, 1.214, 1.169, 1.145, 1.145, 1.156, 1.191, 1.242, 1.321, 1.377, 1.425, 1.426, 1.425,\n> + 1.415, 1.369, 1.285, 1.214, 1.151, 1.094, 1.071, 1.071, 1.084, 1.121, 1.191, 1.242, 1.321, 1.395, 1.425, 1.428,\n> + 1.395, 1.329, 1.236, 1.151, 1.094, 1.055, 1.023, 1.023, 1.041, 1.084, 1.121, 1.193, 1.278, 1.364, 1.422, 1.429,\n> + 1.387, 1.302, 1.205, 1.119, 1.055, 1.023, 1.008, 1.006, 1.021, 1.041, 1.093, 1.164, 1.251, 1.342, 1.409, 1.422,\n> + 1.387, 1.299, 1.203, 1.119, 1.055, 1.016, 1.001, 1.001, 1.012, 1.041, 1.092, 1.163, 1.249, 1.338, 1.404, 1.418,\n> + 1.387, 1.299, 1.203, 1.119, 1.056, 1.024, 1.008, 1.006, 1.022, 1.042, 1.093, 1.163, 1.249, 1.338, 1.404, 1.416,\n> + 1.391, 1.322, 1.232, 1.149, 1.093, 1.056, 1.024, 1.024, 1.042, 1.082, 1.119, 1.191, 1.273, 1.357, 1.409, 1.416,\n> + 1.403, 1.358, 1.278, 1.206, 1.149, 1.093, 1.071, 1.071, 1.082, 1.119, 1.182, 1.236, 1.313, 1.383, 1.411, 1.413,\n> + 1.421, 1.396, 1.334, 1.278, 1.206, 1.162, 1.139, 1.139, 1.149, 1.182, 1.236, 1.302, 1.359, 1.399, 1.409, 1.401,\n> + 1.421, 1.408, 1.385, 1.333, 1.283, 1.243, 1.222, 1.222, 1.231, 1.259, 1.302, 1.354, 1.399, 1.409, 1.401, 1.375,\n> + 1.419, 1.408, 1.407, 1.368, 1.324, 1.283, 1.265, 1.265, 1.265, 1.302, 1.343, 1.382, 1.411, 1.411, 1.375, 1.368\n> + ]\n> + }\n> + ],\n> + \"calibrations_Cb\": [\n> + {\n> + \"ct\": 2900,\n> + \"table\":\n> + [\n> + 1.005, 1.004, 1.002, 1.002, 1.004, 1.006, 1.008, 1.011, 1.013, 1.013, 1.013, 1.013, 1.013, 1.017, 1.034, 1.051,\n> + 1.004, 1.003, 1.002, 1.002, 1.005, 1.007, 1.009, 1.012, 1.014, 1.014, 1.014, 1.013, 1.013, 1.014, 1.018, 1.039,\n> + 1.002, 1.002, 1.001, 1.004, 1.007, 1.009, 1.013, 1.017, 1.021, 1.021, 1.021, 1.018, 1.013, 1.013, 1.015, 1.035,\n> + 1.002, 1.002, 1.004, 1.007, 1.009, 1.013, 1.017, 1.022, 1.026, 1.027, 1.026, 1.023, 1.018, 1.014, 1.015, 1.032,\n> + 1.002, 1.003, 1.006, 1.009, 1.012, 1.016, 1.022, 1.027, 1.032, 1.032, 1.029, 1.026, 1.022, 1.015, 1.015, 1.032,\n> + 1.003, 1.003, 1.006, 1.011, 1.014, 1.019, 1.026, 1.032, 1.035, 1.035, 1.033, 1.029, 1.023, 1.016, 1.016, 1.031,\n> + 1.002, 1.003, 1.006, 1.011, 1.014, 1.019, 1.026, 1.029, 1.035, 1.035, 1.031, 1.028, 1.022, 1.015, 1.015, 1.028,\n> + 1.002, 1.002, 1.004, 1.009, 1.013, 1.016, 1.022, 1.027, 1.029, 1.029, 1.029, 1.024, 1.018, 1.013, 1.013, 1.027,\n> + 1.001, 1.001, 1.002, 1.005, 1.009, 1.013, 1.017, 1.021, 1.025, 1.025, 1.022, 1.018, 1.013, 1.012, 1.013, 1.028,\n> + 1.001, 1.001, 1.001, 1.002, 1.006, 1.009, 1.013, 1.017, 1.019, 1.019, 1.017, 1.013, 1.011, 1.011, 1.016, 1.034,\n> + 1.013, 1.002, 1.001, 1.003, 1.006, 1.009, 1.013, 1.017, 1.019, 1.019, 1.017, 1.015, 1.014, 1.016, 1.039, 1.059,\n> + 1.031, 1.026, 1.024, 1.024, 1.025, 1.028, 1.029, 1.029, 1.028, 1.029, 1.026, 1.026, 1.027, 1.034, 1.059, 1.065\n> + ]\n> + },\n> + {\n> + \"ct\": 5900,\n> + \"table\":\n> + [\n> + 1.013, 1.013, 1.012, 1.014, 1.017, 1.019, 1.019, 1.021, 1.021, 1.019, 1.019, 1.018, 1.019, 1.019, 1.019, 1.012,\n> + 1.013, 1.013, 1.014, 1.017, 1.021, 1.022, 1.024, 1.026, 1.026, 1.026, 1.024, 1.022, 1.021, 1.019, 1.018, 1.012,\n> + 1.013, 1.014, 1.017, 1.021, 1.023, 1.024, 1.027, 1.028, 1.029, 1.029, 1.028, 1.026, 1.023, 1.021, 1.018, 1.006,\n> + 1.014, 1.017, 1.019, 1.023, 1.025, 1.027, 1.029, 1.032, 1.033, 1.033, 1.032, 1.029, 1.026, 1.023, 1.019, 1.004,\n> + 1.016, 1.019, 1.022, 1.025, 1.027, 1.029, 1.032, 1.036, 1.036, 1.035, 1.033, 1.032, 1.029, 1.026, 1.021, 1.005,\n> + 1.016, 1.019, 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2.057, 2.369, 2.765, 3.113,\n> + 2.749, 2.535, 2.241, 1.993, 1.802, 1.669, 1.593, 1.593, 1.609, 1.698, 1.847, 2.052, 2.311, 2.626, 3.113, 3.462,\n> + 2.953, 2.749, 2.441, 2.194, 1.993, 1.802, 1.759, 1.759, 1.759, 1.847, 2.043, 2.251, 2.506, 2.861, 3.462, 3.566\n> + ],\n> + \"sigma\": 0.00715,\n> + \"sigma_Cb\": 0.00323\n> + }\n> + },\n> + {\n> + \"rpi.contrast\":\n> + {\n> + \"ce_enable\": 1,\n> + \"gamma_curve\":\n> + [\n> + 0, 0,\n> + 1024, 5040,\n> + 2048, 9338,\n> + 3072, 12356,\n> + 4096, 15312,\n> + 5120, 18051,\n> + 6144, 20790,\n> + 7168, 23193,\n> + 8192, 25744,\n> + 9216, 27942,\n> + 10240, 30035,\n> + 11264, 32005,\n> + 12288, 33975,\n> + 13312, 35815,\n> + 14336, 37600,\n> + 15360, 39168,\n> + 16384, 40642,\n> + 18432, 43379,\n> + 20480, 45749,\n> + 22528, 47753,\n> + 24576, 49621,\n> + 26624, 51253,\n> + 28672, 52698,\n> + 30720, 53796,\n> + 32768, 54876,\n> + 36864, 57012,\n> + 40960, 58656,\n> + 45056, 59954,\n> + 49152, 61183,\n> + 53248, 62355,\n> + 57344, 63419,\n> + 61440, 64476,\n> + 65535, 65535\n> + ]\n> + }\n> + },\n> + {\n> + \"rpi.ccm\":\n> + {\n> + \"ccms\": [\n> + {\n> + \"ct\": 2920,\n> + \"ccm\":\n> + [\n> + 1.70452, -0.28006, -0.42446,\n> + -0.66546, 2.27544, -0.60998,\n> + -0.16166, -0.89357, 2.05524\n> + ]\n> + },\n> + {\n> + \"ct\": 3630,\n> + \"ccm\":\n> + [\n> + 1.82077, -0.47914, -0.34163,\n> + -0.58711, 2.13712, -0.55002,\n> + -0.12653, -0.74572, 1.87226\n> + ]\n> + },\n> + {\n> + \"ct\": 4550,\n> + \"ccm\":\n> + [\n> + 1.80579, -0.47998, -0.32582,\n> + -0.52116, 2.23331, -0.71214,\n> + -0.11717, -0.64942, 1.76659\n> + ]\n> + },\n> + {\n> + \"ct\": 5580,\n> + \"ccm\":\n> + [\n> + 1.84933, -0.52533, -0.32401,\n> + -0.45888, 2.07922, -0.62033,\n> + -0.12065, -0.56643, 1.68708\n> + ]\n> + }\n> + ]\n> + }\n> + },\n> + {\n> + \"rpi.sharpen\":\n> + {\n> + \"threshold\": 0.75,\n> + \"limit\": 0.5,\n> + \"strength\": 1.0\n> + }\n> + },\n> + {\n> + \"rpi.sync\": { }\n> + }\n> + ]\n> +}\n> \\ No newline at end of file","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 4616FC3308\n\tfor ;\n\tFri, 17 Jul 2026 15:35:25 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7A51B67E25;\n\tFri, 17 Jul 2026 17:35:24 +0200 (CEST)","from sender4-op-o11.zoho.com (sender4-op-o11.zoho.com\n\t[136.143.188.11])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 05D1267E25\n\tfor ;\n\tFri, 17 Jul 2026 17:35:21 +0200 (CEST)","by mx.zohomail.com with SMTPS id 1784302515876958.2601120063144;\n\tFri, 17 Jul 2026 08:35:15 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=collabora.com\n\theader.i=robert.mader@collabora.com header.b=\"PiS6gB6m\"; \n\tdkim-atps=neutral","ARC-Seal":"i=1; a=rsa-sha256; t=1784302518; cv=none; \n\td=zohomail.com; s=zohoarc; \n\tb=HoA4H4lvOlmp+q00+KMLQ9NBsW/dLMAEm5jsFyfDkZ3YRpk9eQJa5jpDMpQ/xhN6DEBzUF4HEm3yC5Z2GoedJL1zx2oZbcSsl+/k95iFIv8X0JbiLNonFK3vohG4BTOGL1BLflkg0jDVMJPuuFIlyRj0Gy4lUVTPdu8tXaUNXSg=","ARC-Message-Signature":"i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; \n\ts=zohoarc; t=1784302518;\n\th=Content-Type:Content-Transfer-Encoding:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To:Cc;\n\tbh=SKw0jKMAo6ISObQ02qwk7+lqxrnG1S+c0XA+GOqjX1s=; \n\tb=eUnmhdZsdfT95PDABl/lDYGOTPiFomKS42QZCGZwHjlok/5SjblD+ZCOq5cOgplcbPLd4PyD0gP+ac0UDegcroxfSJ2OfEkPUC5JmuOF76whvQIgIhBFNVqsl3JN3ijL2yidDZLs8rcGYmdlpUmCKwKfpvDjiIdpZq41X7xMtpg=","ARC-Authentication-Results":"i=1; mx.zohomail.com;\n\tdkim=pass header.i=collabora.com;\n\tspf=pass smtp.mailfrom=robert.mader@collabora.com;\n\tdmarc=pass header.from=","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1784302518;\n\ts=zohomail; d=collabora.com; i=robert.mader@collabora.com;\n\th=Message-ID:Date:Date:MIME-Version:Subject:Subject:To:To:From:From:In-Reply-To:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To:Cc;\n\tbh=SKw0jKMAo6ISObQ02qwk7+lqxrnG1S+c0XA+GOqjX1s=;\n\tb=PiS6gB6mHtlcdoF64Aqg2jqKQToq07oW7v2i9yBcbgZDV2MdwYY1DtM8A61OOzjL\n\t+yFNvKRyR8lbU87N0Xpvq3mTUU27SHCspBScdaXgK3WnOo0t+0raT4DHmGgpGPmG+sU\n\towToUrLWdFfj7R/vQ25ZcDhhLoEz84BuSd1BZz3I=","Message-ID":"<91bddaa5-1ce8-4a98-b631-03f60bfc2d72@collabora.com>","Date":"Fri, 17 Jul 2026 17:35:13 +0200","MIME-Version":"1.0","User-Agent":"Mozilla Thunderbird","Subject":"Re: [PATCH v1 2/2] ipa: rpi: Add support for Sony IMX355","To":"Naushir Patuck ,\n\tlibcamera-devel@lists.libcamera.org","References":"<20260717134634.2578897-1-naush@raspberrypi.com>\n\t<20260717134634.2578897-3-naush@raspberrypi.com>","Content-Language":"en-US, de-DE","From":"Robert Mader ","In-Reply-To":"<20260717134634.2578897-3-naush@raspberrypi.com>","Content-Type":"text/plain; charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":39776,"web_url":"https://patchwork.libcamera.org/comment/39776/","msgid":"<20260721152703.GO50424@killaraus.ideasonboard.com>","date":"2026-07-21T15:27:03","subject":"Re: [PATCH v1 2/2] ipa: rpi: Add support for Sony IMX355","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/people/2/","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"content":"Hi Naush,\n\nThank you for the patch.\n\nOn Fri, Jul 17, 2026 at 02:42:12PM +0100, Naushir Patuck wrote:\n> This includes the RPi camera helper and pisp/vc4 tuning files.\n> \n> Signed-off-by: Naushir Patuck \n> ---\n> src/ipa/rpi/cam_helper/cam_helper_imx355.cpp | 69 +\n> src/ipa/rpi/cam_helper/meson.build | 1 +\n> src/ipa/rpi/pisp/data/imx355.json | 1233 ++++++++++++++++++\n> src/ipa/rpi/pisp/data/meson.build | 1 +\n> src/ipa/rpi/vc4/data/imx355.json | 416 ++++++\n> 5 files changed, 1720 insertions(+)\n> create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> create mode 100644 src/ipa/rpi/pisp/data/imx355.json\n> create mode 100644 src/ipa/rpi/vc4/data/imx355.json\n> \n> diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> new file mode 100644\n> index 000000000000..00e5fc836433\n> --- /dev/null\n> +++ b/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> @@ -0,0 +1,69 @@\n> +/* SPDX-License-Identifier: BSD-2-Clause */\n> +/*\n> + * Copyright (C) 2026, Raspberry Pi Ltd\n> + *\n> + * camera helper for imx355 sensor\n> + */\n> +\n> +#include \n> +#include \n> +#include \n> +#include \n> +\n> +#include \"cam_helper.h\"\n> +\n> +using namespace RPiController;\n> +\n> +class CamHelperImx355 : public CamHelper\n> +{\n> +public:\n> +\tCamHelperImx355();\n> +\tuint32_t gainCode(double gain) const override;\n> +\tdouble gain(uint32_t gainCode) const override;\n> +\tunsigned int mistrustFramesModeSwitch() const override;\n> +\tbool sensorEmbeddedDataPresent() const override;\n> +\n> +private:\n> +\t/*\n> +\t * Smallest difference between the frame length and integration time,\n> +\t * in units of lines.\n> +\t */\n> +\tstatic constexpr int frameIntegrationDiff = 4;\n> +};\n> +\n> +CamHelperImx355::CamHelperImx355()\n> +\t: CamHelper({}, frameIntegrationDiff)\n> +{\n> +}\n> +\n> +uint32_t CamHelperImx355::gainCode(double gain) const\n> +{\n> +\treturn (uint32_t)(1024 - 1024 / gain);\n> +}\n> +\n> +double CamHelperImx355::gain(uint32_t gainCode) const\n> +{\n> +\treturn 1024.0 / (1024 - gainCode);\n> +}\n> +\n> +unsigned int CamHelperImx355::mistrustFramesModeSwitch() const\n> +{\n> +\t/*\n> +\t * For reasons unknown, we do occasionally get a bogus metadata frame\n> +\t * at a mode switch (though not at start-up). Possibly warrants some\n> +\t * investigation, though not a big deal.\n> +\t */\n> +\treturn 1;\n\nThis is the second helper for Sony sensors doing this, the first one\nbeing IMX219. Given that the IMX219 helper actually disabled embedded\ndata by default due to the data stream \"randomly returning junk register\nvalues\", I'm not concerned by that one. For IMX355 though, I'd like to\nunderstand how you've noticed this and have an idea of the frequency at\nwhich is occurs, in case someone would like to investigate later.\n\n> +}\n> +\n> +bool CamHelperImx355::sensorEmbeddedDataPresent() const\n> +{\n> +\treturn 0;\n> +}\n> +\n> +static CamHelper *create()\n> +{\n> +\treturn new CamHelperImx355();\n> +}\n> +\n> +static RegisterCamHelper reg(\"imx355\", &create);\n\n[snip]\n\nThe patch otherwise looks good.\n\nReviewed-by: Laurent Pinchart ","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 01C71BDE17\n\tfor ;\n\tTue, 21 Jul 2026 15:27:07 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A8D9367E67;\n\tTue, 21 Jul 2026 17:27:06 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 584546601C\n\tfor ;\n\tTue, 21 Jul 2026 17:27:05 +0200 (CEST)","from killaraus.ideasonboard.com\n\t(2001-14ba-70f3-e800--a06.rev.dnainternet.fi\n\t[IPv6:2001:14ba:70f3:e800::a06])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id A638AC1;\n\tTue, 21 Jul 2026 17:26:05 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"apFIvn0n\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1784647565;\n\tbh=n5c4nROxCdzvzgqhPVeFv54KeEQXN0l0GFWr1tq1Oac=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=apFIvn0nVGE6xIo1mmPJhZcX5u6UOMfT3peWEsNu7aRQSbffjIgk44zQHjItbIAoZ\n\t5fNlxN52yqBK6/aMBc0bPVBWdkTW0rlnKoEVCeOJR/D34Xq62SrK2ZVhFKR7wRk5bg\n\tpMEUNAFbx78gLKdxdig2TSAdeWUmX4PXM9ikane4=","Date":"Tue, 21 Jul 2026 18:27:03 +0300","From":"Laurent Pinchart ","To":"Naushir Patuck ","Cc":"libcamera-devel@lists.libcamera.org","Subject":"Re: [PATCH v1 2/2] ipa: rpi: Add support for Sony IMX355","Message-ID":"<20260721152703.GO50424@killaraus.ideasonboard.com>","References":"<20260717134634.2578897-1-naush@raspberrypi.com>\n\t<20260717134634.2578897-3-naush@raspberrypi.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=utf-8","Content-Disposition":"inline","In-Reply-To":"<20260717134634.2578897-3-naush@raspberrypi.com>","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":39788,"web_url":"https://patchwork.libcamera.org/comment/39788/","msgid":"","date":"2026-07-22T09:00:19","subject":"Re: [PATCH v1 2/2] ipa: rpi: Add support for Sony IMX355","submitter":{"id":42,"url":"https://patchwork.libcamera.org/api/people/42/","name":"David Plowman","email":"david.plowman@raspberrypi.com"},"content":"Hi Naush\n\nThanks for the patch.\n\nOn Tue, 21 Jul 2026 at 16:27, Laurent Pinchart\n wrote:\n>\n> Hi Naush,\n>\n> Thank you for the patch.\n>\n> On Fri, Jul 17, 2026 at 02:42:12PM +0100, Naushir Patuck wrote:\n> > This includes the RPi camera helper and pisp/vc4 tuning files.\n> >\n> > Signed-off-by: Naushir Patuck \n> > ---\n> > src/ipa/rpi/cam_helper/cam_helper_imx355.cpp | 69 +\n> > src/ipa/rpi/cam_helper/meson.build | 1 +\n> > src/ipa/rpi/pisp/data/imx355.json | 1233 ++++++++++++++++++\n> > src/ipa/rpi/pisp/data/meson.build | 1 +\n> > src/ipa/rpi/vc4/data/imx355.json | 416 ++++++\n> > 5 files changed, 1720 insertions(+)\n> > create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> > create mode 100644 src/ipa/rpi/pisp/data/imx355.json\n> > create mode 100644 src/ipa/rpi/vc4/data/imx355.json\n> >\n> > diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> > new file mode 100644\n> > index 000000000000..00e5fc836433\n> > --- /dev/null\n> > +++ b/src/ipa/rpi/cam_helper/cam_helper_imx355.cpp\n> > @@ -0,0 +1,69 @@\n> > +/* SPDX-License-Identifier: BSD-2-Clause */\n> > +/*\n> > + * Copyright (C) 2026, Raspberry Pi Ltd\n> > + *\n> > + * camera helper for imx355 sensor\n> > + */\n> > +\n> > +#include \n> > +#include \n> > +#include \n> > +#include \n> > +\n> > +#include \"cam_helper.h\"\n> > +\n> > +using namespace RPiController;\n> > +\n> > +class CamHelperImx355 : public CamHelper\n> > +{\n> > +public:\n> > + CamHelperImx355();\n> > + uint32_t gainCode(double gain) const override;\n> > + double gain(uint32_t gainCode) const override;\n> > + unsigned int mistrustFramesModeSwitch() const override;\n> > + bool sensorEmbeddedDataPresent() const override;\n> > +\n> > +private:\n> > + /*\n> > + * Smallest difference between the frame length and integration time,\n> > + * in units of lines.\n> > + */\n> > + static constexpr int frameIntegrationDiff = 4;\n> > +};\n> > +\n> > +CamHelperImx355::CamHelperImx355()\n> > + : CamHelper({}, frameIntegrationDiff)\n> > +{\n> > +}\n> > +\n> > +uint32_t CamHelperImx355::gainCode(double gain) const\n> > +{\n> > + return (uint32_t)(1024 - 1024 / gain);\n> > +}\n> > +\n> > +double CamHelperImx355::gain(uint32_t gainCode) const\n> > +{\n> > + return 1024.0 / (1024 - gainCode);\n> > +}\n> > +\n> > +unsigned int CamHelperImx355::mistrustFramesModeSwitch() const\n> > +{\n> > + /*\n> > + * For reasons unknown, we do occasionally get a bogus metadata frame\n> > + * at a mode switch (though not at start-up). Possibly warrants some\n> > + * investigation, though not a big deal.\n> > + */\n> > + return 1;\n>\n> This is the second helper for Sony sensors doing this, the first one\n> being IMX219. Given that the IMX219 helper actually disabled embedded\n> data by default due to the data stream \"randomly returning junk register\n> values\", I'm not concerned by that one. For IMX355 though, I'd like to\n> understand how you've noticed this and have an idea of the frequency at\n> which is occurs, in case someone would like to investigate later.\n>\n> > +}\n> > +\n> > +bool CamHelperImx355::sensorEmbeddedDataPresent() const\n> > +{\n> > + return 0;\n> > +}\n> > +\n> > +static CamHelper *create()\n> > +{\n> > + return new CamHelperImx355();\n> > +}\n> > +\n> > +static RegisterCamHelper reg(\"imx355\", &create);\n>\n> [snip]\n>\n> The patch otherwise looks good.\n>\n> Reviewed-by: Laurent Pinchart \n\nYes, I'm inclined to agree we should try it with the embedded data\nenabled, but that's not particularly a blocker.\n\nReviewed-by: David Plowman \n\nThanks!\n\nDavid\n\n>\n> --\n> Regards,\n>\n> Laurent Pinchart","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 5434DBDE4C\n\tfor ;\n\tWed, 22 Jul 2026 09:00:34 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 4203E67E8C;\n\tWed, 22 Jul 2026 11:00:33 +0200 (CEST)","from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com\n\t[IPv6:2a00:1450:4864:20::52a])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id DFB0361451\n\tfor ;\n\tWed, 22 Jul 2026 11:00:31 +0200 (CEST)","by mail-ed1-x52a.google.com with SMTP id\n\t4fb4d7f45d1cf-69eefa92a1cso2392660a12.3\n\tfor ;\n\tWed, 22 Jul 2026 02:00:31 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; 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