[libcamera-devel] [PATCH 08/11] libcamera: ipu3: Attach to an IPA and allow it to set sensor controls

[Niklas Söderlund]

Attache to an IPA and allow it to push V4L2 controls that applies on the
camera sensor. The IPA is not fully integrated in the pipeline as
statistics and parameters buffers are not yet allocated, processed by
the IPA nor queued to the hardware.

Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
---
 src/libcamera/pipeline/ipu3/ipu3.cpp | 83 +++++++++++++++++++++++++++-
 1 file changed, 82 insertions(+), 1 deletion(-)

diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index 62e99a308a6136a7..d161c2e68c0db0f2 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -14,11 +14,13 @@
 #include <libcamera/camera.h>
 #include <libcamera/control_ids.h>
 #include <libcamera/formats.h>
+#include <libcamera/ipa/ipu3.h>
 #include <libcamera/request.h>
 #include <libcamera/stream.h>
 
 #include "libcamera/internal/camera_sensor.h"
 #include "libcamera/internal/device_enumerator.h"
+#include "libcamera/internal/ipa_manager.h"
 #include "libcamera/internal/log.h"
 #include "libcamera/internal/media_device.h"
 #include "libcamera/internal/pipeline_handler.h"
@@ -49,10 +51,12 @@ class IPU3CameraData : public CameraData
 {
 public:
 	IPU3CameraData(PipelineHandler *pipe)
-		: CameraData(pipe)
+		: CameraData(pipe), delayedCtrls_(nullptr)
 	{
 	}
 
+	int loadIPA();
+
 	void imguOutputBufferReady(FrameBuffer *buffer);
 	void cio2BufferReady(FrameBuffer *buffer);
 
@@ -62,6 +66,11 @@ public:
 	Stream outStream_;
 	Stream vfStream_;
 	Stream rawStream_;
+
+	DelayedControls *delayedCtrls_;
+
+private:
+	void actOnIpa(unsigned int id, const IPAOperationData &op);
 };
 
 class IPU3CameraConfiguration : public CameraConfiguration
@@ -590,6 +599,12 @@ int PipelineHandlerIPU3::start(Camera *camera)
 	IPU3CameraData *data = cameraData(camera);
 	CIO2Device *cio2 = &data->cio2_;
 	ImgUDevice *imgu = data->imgu_;
+
+	CameraSensorInfo sensorInfo = {};
+	std::map<unsigned int, IPAStream> streamConfig;
+	std::map<unsigned int, const ControlInfoMap &> entityControls;
+	IPAOperationData ipaConfig;
+
 	int ret;
 
 	/* Allocate buffers for internal pipeline usage. */
@@ -597,6 +612,10 @@ int PipelineHandlerIPU3::start(Camera *camera)
 	if (ret)
 		return ret;
 
+	ret = data->ipa_->start();
+	if (ret)
+		goto error;
+
 	/*
 	 * Start the ImgU video devices, buffers will be queued to the
 	 * ImgU output and viewfinder when requests will be queued.
@@ -612,9 +631,33 @@ int PipelineHandlerIPU3::start(Camera *camera)
 		goto error;
 	}
 
+	/* Inform IPA of stream configuration and sensor controls. */
+	ret = data->cio2_.sensor()->sensorInfo(&sensorInfo);
+	if (ret) {
+		/* \todo Turn to hard failure once sensors info is mandatory. */
+		LOG(IPU3, Warning) << "Camera sensor information not available";
+		sensorInfo = {};
+		ret = 0;
+	}
+
+	streamConfig[0] = {
+		.pixelFormat = data->outStream_.configuration().pixelFormat,
+		.size = data->outStream_.configuration().size,
+	};
+	streamConfig[0] = {
+		.pixelFormat = data->vfStream_.configuration().pixelFormat,
+		.size = data->vfStream_.configuration().size,
+	};
+
+	entityControls.emplace(0, data->cio2_.sensor()->controls());
+
+	data->ipa_->configure(sensorInfo, streamConfig, entityControls,
+			      ipaConfig, nullptr);
+
 	return 0;
 
 error:
+	data->ipa_->stop();
 	freeBuffers(camera);
 	LOG(IPU3, Error) << "Failed to start camera " << camera->id();
 
@@ -631,6 +674,8 @@ void PipelineHandlerIPU3::stop(Camera *camera)
 	if (ret)
 		LOG(IPU3, Warning) << "Failed to stop camera " << camera->id();
 
+	data->ipa_->stop();
+
 	freeBuffers(camera);
 }
 
@@ -762,12 +807,20 @@ int PipelineHandlerIPU3::registerCameras()
 		if (ret)
 			continue;
 
+		ret = data->loadIPA();
+		if (ret)
+			continue;
+
 		/* Initialize the camera properties. */
 		data->properties_ = cio2->sensor()->properties();
 
 		/* Initialze the camera controls. */
 		data->controlInfo_ = IPU3Controls;
 
+		data->delayedCtrls_ = cio2->sensor()->delayedContols();
+		data->cio2_.frameStart().connect(data->delayedCtrls_,
+						 &DelayedControls::frameStart);
+
 		/**
 		 * \todo Dynamically assign ImgU and output devices to each
 		 * stream and camera; as of now, limit support to two cameras
@@ -811,6 +864,34 @@ int PipelineHandlerIPU3::registerCameras()
 	return numCameras ? 0 : -ENODEV;
 }
 
+int IPU3CameraData::loadIPA()
+{
+	ipa_ = IPAManager::createIPA(pipe_, 1, 1);
+	if (!ipa_)
+		return -ENOENT;
+
+	ipa_->queueFrameAction.connect(this, &IPU3CameraData::actOnIpa);
+
+	ipa_->init(IPASettings{});
+
+	return 0;
+}
+
+void IPU3CameraData::actOnIpa([[maybe_unused]] unsigned int id,
+			      const IPAOperationData &action)
+{
+	switch (action.operation) {
+	case IPU3_IPA_ACTION_SET_SENSOR_CONTROLS: {
+		const ControlList &controls = action.controls[0];
+		delayedCtrls_->push(controls);
+		break;
+	}
+	default:
+		LOG(IPU3, Error) << "Unknown action " << action.operation;
+		break;
+	}
+}
+
 /* -----------------------------------------------------------------------------
  * Buffer Ready slots
  */
-- 
2.29.2