libcamera: ipu3: Set stream configuration

Use the cached sensor maximum resolution and the pixel format
generated by the ImgU output devices as default stream configuration.

While at it, replace the hardcoded numerical value for the number of
buffers with a named constexpr.

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

1 files changed, 15 insertions, 19 deletions

diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index dfb7eed3..25434d52 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -169,6 +169,8 @@ private:
 		Stream stream_;
 	};
 
+	static constexpr unsigned int IPU3_BUFFER_COUNT = 4;
+
 	IPU3CameraData *cameraData(const Camera *camera)
 	{
 		return static_cast<IPU3CameraData *>(
@@ -201,26 +203,20 @@ std::map<Stream *, StreamConfiguration>
 PipelineHandlerIPU3::streamConfiguration(Camera *camera,
 					 std::set<Stream *> &streams)
 {
-	IPU3CameraData *data = cameraData(camera);
 	std::map<Stream *, StreamConfiguration> configs;
-	V4L2SubdeviceFormat format = {};
-
-	/*
-	 * FIXME: As of now, return the image format reported by the sensor.
-	 * In future good defaults should be provided for each stream.
-	 */
-	if (data->cio2_.sensor_->getFormat(0, &format)) {
-		LOG(IPU3, Error) << "Failed to create stream configurations";
-		return configs;
-	}
-
-	StreamConfiguration config = {};
-	config.width = format.width;
-	config.height = format.height;
-	config.pixelFormat = V4L2_PIX_FMT_IPU3_SGRBG10;
-	config.bufferCount = 4;
-
-	configs[&data->stream_] = config;
+	IPU3CameraData *data = cameraData(camera);
+	StreamConfiguration *config = &configs[&data->stream_];
+	Size *maxSize = &data->.cio2_.maxSize_;
+
+	config->width = maxSize->width;
+	config->height = maxSize->height;
+	config->pixelFormat = V4L2_PIX_FMT_NV12;
+	config->bufferCount = IPU3_BUFFER_COUNT;
+
+	LOG(IPU3, Debug)
+		<< "Stream format set to " << config->width << "x"
+		<< config->height << "-0x" << std::hex << std::setfill('0')
+		<< std::setw(8) << config->pixelFormat;
 
 	return configs;
 }