libcamera: ipu3: cio2: Add function to generate configuration

Collect the code used to generate configurations for the CIO2 block in
the CIO2Device class. This allows simplifying the code and allow further
changes to only happen at one code location.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/pipeline/ipu3/cio2.cpp

@@ -9,6 +9,9 @@
 
 #include <linux/media-bus-format.h>
 
+#include <libcamera/formats.h>
+#include <libcamera/stream.h>
+
 #include "libcamera/internal/camera_sensor.h"
 #include "libcamera/internal/media_device.h"
 #include "libcamera/internal/v4l2_subdevice.h"
@@ -20,11 +23,11 @@ LOG_DECLARE_CATEGORY(IPU3)
 
 namespace {
 
-static const std::map<uint32_t, V4L2PixelFormat> mbusCodesToInfo = {
+static const std::map<uint32_t, PixelFormat> mbusCodesToInfo = {
-	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2PixelFormat(V4L2_PIX_FMT_IPU3_SBGGR10) },
+	{ MEDIA_BUS_FMT_SBGGR10_1X10, formats::SBGGR10_IPU3 },
-	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2PixelFormat(V4L2_PIX_FMT_IPU3_SGBRG10) },
+	{ MEDIA_BUS_FMT_SGBRG10_1X10, formats::SGBRG10_IPU3 },
-	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2PixelFormat(V4L2_PIX_FMT_IPU3_SGRBG10) },
+	{ MEDIA_BUS_FMT_SGRBG10_1X10, formats::SGRBG10_IPU3 },
-	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2PixelFormat(V4L2_PIX_FMT_IPU3_SRGGB10) },
+	{ MEDIA_BUS_FMT_SRGGB10_1X10, formats::SRGGB10_IPU3 },
 };
 
 } /* namespace */
@@ -159,7 +162,9 @@ int CIO2Device::configure(const Size &size, V4L2DeviceFormat *outputFormat)
 	if (itInfo == mbusCodesToInfo.end())
 		return -EINVAL;
 
-	outputFormat->fourcc = itInfo->second;
+	const PixelFormatInfo &info = PixelFormatInfo::info(itInfo->second);
+
+	outputFormat->fourcc = info.v4l2Format;
 	outputFormat->size = sensorFormat.size;
 	outputFormat->planesCount = 1;
 
@@ -172,6 +177,34 @@ int CIO2Device::configure(const Size &size, V4L2DeviceFormat *outputFormat)
 	return 0;
 }
 
+StreamConfiguration
+CIO2Device::generateConfiguration(Size size) const
+{
+	StreamConfiguration cfg;
+
+	/* If no desired size use the sensor resolution. */
+	if (!size.width && !size.height)
+		size = sensor_->resolution();
+
+	/* Query the sensor static information for closest match. */
+	std::vector<unsigned int> mbusCodes;
+	std::transform(mbusCodesToInfo.begin(), mbusCodesToInfo.end(),
+		       std::back_inserter(mbusCodes),
+		       [](auto &pair) { return pair.first; });
+
+	V4L2SubdeviceFormat sensorFormat = sensor_->getFormat(mbusCodes, size);
+	if (!sensorFormat.mbus_code) {
+		LOG(IPU3, Error) << "Sensor does not support mbus code";
+		return {};
+	}
+
+	cfg.size = sensorFormat.size;
+	cfg.pixelFormat = mbusCodesToInfo.at(sensorFormat.mbus_code);
+	cfg.bufferCount = CIO2_BUFFER_COUNT;
+
+	return cfg;
+}
+
 /**
  * \brief Allocate frame buffers for the CIO2 output
  *

src/libcamera/pipeline/ipu3/cio2.h

@@ -20,6 +20,7 @@ class V4L2DeviceFormat;
 class V4L2Subdevice;
 class V4L2VideoDevice;
 struct Size;
+struct StreamConfiguration;
 
 class CIO2Device
 {
@@ -32,6 +33,8 @@ public:
 	int init(const MediaDevice *media, unsigned int index);
 	int configure(const Size &size, V4L2DeviceFormat *outputFormat);
 
+	StreamConfiguration generateConfiguration(Size size) const;
+
 	int allocateBuffers();
 	void freeBuffers();
 

src/libcamera/pipeline/ipu3/ipu3.cpp

@@ -36,13 +36,6 @@ LOG_DEFINE_CATEGORY(IPU3)
 
 class IPU3CameraData;
 
-static const std::map<uint32_t, PixelFormat> sensorMbusToPixel = {
-	{ MEDIA_BUS_FMT_SBGGR10_1X10, formats::SBGGR10_IPU3 },
-	{ MEDIA_BUS_FMT_SGBRG10_1X10, formats::SGBRG10_IPU3 },
-	{ MEDIA_BUS_FMT_SGRBG10_1X10, formats::SGRBG10_IPU3 },
-	{ MEDIA_BUS_FMT_SRGGB10_1X10, formats::SRGGB10_IPU3 },
-};
-
 class ImgUDevice
 {
 public:
@@ -147,7 +140,7 @@ public:
 
 	Status validate() override;
 
-	const V4L2SubdeviceFormat &sensorFormat() { return sensorFormat_; }
+	const StreamConfiguration &cio2Format() const { return cio2Configuration_; };
 	const std::vector<const IPU3Stream *> &streams() { return streams_; }
 
 private:
@@ -165,7 +158,7 @@ private:
 	std::shared_ptr<Camera> camera_;
 	const IPU3CameraData *data_;
 
-	V4L2SubdeviceFormat sensorFormat_;
+	StreamConfiguration cio2Configuration_;
 	std::vector<const IPU3Stream *> streams_;
 };
 
@@ -252,7 +245,7 @@ void IPU3CameraConfiguration::assignStreams()
 
 		if (info.colourEncoding == PixelFormatInfo::ColourEncodingRAW)
 			stream = &data_->rawStream_;
-		else if (cfg.size == sensorFormat_.size)
+		else if (cfg.size == cio2Configuration_.size)
 			stream = &data_->outStream_;
 		else
 			stream = &data_->vfStream_;
@@ -277,8 +270,8 @@ void IPU3CameraConfiguration::adjustStream(StreamConfiguration &cfg, bool scale)
 		 */
 		if (!cfg.size.width || !cfg.size.height) {
 			cfg.size.width = 1280;
-			cfg.size.height = 1280 * sensorFormat_.size.height
+			cfg.size.height = 1280 * cio2Configuration_.size.height
-					/ sensorFormat_.size.width;
+					/ cio2Configuration_.size.width;
 		}
 
 		/*
@@ -297,7 +290,7 @@ void IPU3CameraConfiguration::adjustStream(StreamConfiguration &cfg, bool scale)
 		 * \todo: Properly support cropping when the ImgU driver
 		 * interface will be cleaned up.
 		 */
-		cfg.size = sensorFormat_.size;
+		cfg.size = cio2Configuration_.size;
 	}
 
 	/*
@@ -313,7 +306,6 @@ void IPU3CameraConfiguration::adjustStream(StreamConfiguration &cfg, bool scale)
 
 CameraConfiguration::Status IPU3CameraConfiguration::validate()
 {
-	const CameraSensor *sensor = data_->cio2_.sensor_;
 	Status status = Valid;
 
 	if (config_.empty())
@@ -340,16 +332,10 @@ CameraConfiguration::Status IPU3CameraConfiguration::validate()
 			size.height = cfg.size.height;
 	}
 
-	if (!size.width || !size.height)
+	/* Generate raw configuration from CIO2. */
-		size = sensor->resolution();
+	cio2Configuration_ = data_->cio2_.generateConfiguration(size);
-
+	if (!cio2Configuration_.pixelFormat.isValid())
-	sensorFormat_ = sensor->getFormat({ MEDIA_BUS_FMT_SBGGR10_1X10,
+		return Invalid;
-					    MEDIA_BUS_FMT_SGBRG10_1X10,
-					    MEDIA_BUS_FMT_SGRBG10_1X10,
-					    MEDIA_BUS_FMT_SRGGB10_1X10 },
-					  size);
-	if (!sensorFormat_.size.width || !sensorFormat_.size.height)
-		sensorFormat_.size = sensor->resolution();
 
 	/* Assign streams to each configuration entry. */
 	assignStreams();
@@ -361,20 +347,13 @@ CameraConfiguration::Status IPU3CameraConfiguration::validate()
 		const IPU3Stream *stream = streams_[i];
 
 		if (stream->raw_) {
-			const auto &itFormat =
+			cfg = cio2Configuration_;
-				sensorMbusToPixel.find(sensorFormat_.mbus_code);
-			if (itFormat == sensorMbusToPixel.end())
-				return Invalid;
-
-			cfg.pixelFormat = itFormat->second;
-			cfg.size = sensorFormat_.size;
 		} else {
 			bool scale = stream == &data_->vfStream_;
 			adjustStream(config_[i], scale);
+			cfg.bufferCount = IPU3_BUFFER_COUNT;
 		}
 
-		cfg.bufferCount = IPU3_BUFFER_COUNT;
-
 		if (cfg.pixelFormat != oldCfg.pixelFormat ||
 		    cfg.size != oldCfg.size) {
 			LOG(IPU3, Debug)
@@ -454,14 +433,7 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
 
 			cfg.size = data->cio2_.sensor_->resolution();
 
-			V4L2SubdeviceFormat sensorFormat =
+			cfg = data->cio2_.generateConfiguration(cfg.size);
-				data->cio2_.sensor_->getFormat({ MEDIA_BUS_FMT_SBGGR10_1X10,
-								 MEDIA_BUS_FMT_SGBRG10_1X10,
-								 MEDIA_BUS_FMT_SGRBG10_1X10,
-								 MEDIA_BUS_FMT_SRGGB10_1X10 },
-							       cfg.size);
-			cfg.pixelFormat =
-				sensorMbusToPixel.at(sensorFormat.mbus_code);
 			break;
 		}
 
@@ -575,7 +547,7 @@ int PipelineHandlerIPU3::configure(Camera *camera, CameraConfiguration *c)
 	 * Pass the requested stream size to the CIO2 unit and get back the
 	 * adjusted format to be propagated to the ImgU output devices.
 	 */
-	const Size &sensorSize = config->sensorFormat().size;
+	const Size &sensorSize = config->cio2Format().size;
 	V4L2DeviceFormat cio2Format = {};
 	ret = cio2->configure(sensorSize, &cio2Format);
 	if (ret)