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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* ipu3.cpp - Pipeline handler for Intel IPU3
*/
#include <memory>
#include <vector>
#include <libcamera/camera.h>
#include <libcamera/stream.h>
#include "device_enumerator.h"
#include "log.h"
#include "media_device.h"
#include "pipeline_handler.h"
#include "utils.h"
#include "v4l2_device.h"
namespace libcamera {
LOG_DEFINE_CATEGORY(IPU3)
class PipelineHandlerIPU3 : public PipelineHandler
{
public:
PipelineHandlerIPU3(CameraManager *manager);
~PipelineHandlerIPU3();
bool match(DeviceEnumerator *enumerator);
private:
class IPU3CameraData : public CameraData
{
public:
IPU3CameraData()
: dev_(nullptr) {}
~IPU3CameraData() { delete dev_; }
V4L2Device *dev_;
Stream stream_;
};
std::shared_ptr<MediaDevice> cio2_;
std::shared_ptr<MediaDevice> imgu_;
IPU3CameraData *cameraData(const Camera *camera)
{
return static_cast<IPU3CameraData *>(
PipelineHandler::cameraData(camera));
}
V4L2Device *createVideoDevice(unsigned int id);
void registerCameras();
};
PipelineHandlerIPU3::PipelineHandlerIPU3(CameraManager *manager)
: PipelineHandler(manager), cio2_(nullptr), imgu_(nullptr)
{
}
PipelineHandlerIPU3::~PipelineHandlerIPU3()
{
if (cio2_)
cio2_->release();
if (imgu_)
imgu_->release();
}
bool PipelineHandlerIPU3::match(DeviceEnumerator *enumerator)
{
DeviceMatch cio2_dm("ipu3-cio2");
cio2_dm.add("ipu3-csi2 0");
cio2_dm.add("ipu3-cio2 0");
cio2_dm.add("ipu3-csi2 1");
cio2_dm.add("ipu3-cio2 1");
cio2_dm.add("ipu3-csi2 2");
cio2_dm.add("ipu3-cio2 2");
cio2_dm.add("ipu3-csi2 3");
cio2_dm.add("ipu3-cio2 3");
DeviceMatch imgu_dm("ipu3-imgu");
imgu_dm.add("ipu3-imgu 0");
imgu_dm.add("ipu3-imgu 0 input");
imgu_dm.add("ipu3-imgu 0 parameters");
imgu_dm.add("ipu3-imgu 0 output");
imgu_dm.add("ipu3-imgu 0 viewfinder");
imgu_dm.add("ipu3-imgu 0 3a stat");
imgu_dm.add("ipu3-imgu 1");
imgu_dm.add("ipu3-imgu 1 input");
imgu_dm.add("ipu3-imgu 1 parameters");
imgu_dm.add("ipu3-imgu 1 output");
imgu_dm.add("ipu3-imgu 1 viewfinder");
imgu_dm.add("ipu3-imgu 1 3a stat");
cio2_ = std::move(enumerator->search(cio2_dm));
if (!cio2_)
return false;
imgu_ = std::move(enumerator->search(imgu_dm));
if (!imgu_)
return false;
/*
* It is safe to acquire both media devices at this point as
* DeviceEnumerator::search() skips the busy ones for us.
*/
cio2_->acquire();
imgu_->acquire();
/*
* Disable all links that are enabled by default on CIO2, as camera
* creation enables all valid links it finds.
*
* Close the CIO2 media device after, as links are enabled and should
* not need to be changed after.
*/
if (cio2_->open())
goto error_release_mdev;
if (cio2_->disableLinks())
goto error_close_cio2;
registerCameras();
cio2_->close();
return true;
error_close_cio2:
cio2_->close();
error_release_mdev:
cio2_->release();
imgu_->release();
return false;
}
/* Create video devices for the CIO2 unit associated with a camera. */
V4L2Device *PipelineHandlerIPU3::createVideoDevice(unsigned int id)
{
std::string cio2Name = "ipu3-cio2 " + std::to_string(id);
MediaEntity *cio2 = cio2_->getEntityByName(cio2Name);
if (!cio2)
return nullptr;
V4L2Device *dev = new V4L2Device(*cio2);
if (dev->open()) {
delete dev;
return nullptr;
}
dev->close();
return dev;
}
/*
* Cameras are created associating an image sensor (represented by a
* media entity with function MEDIA_ENT_F_CAM_SENSOR) to one of the four
* CIO2 CSI-2 receivers.
*/
void PipelineHandlerIPU3::registerCameras()
{
/*
* For each CSI-2 receiver on the IPU3, create a Camera if an
* image sensor is connected to it.
*/
unsigned int numCameras = 0;
for (unsigned int id = 0; id < 4; ++id) {
std::string csi2Name = "ipu3-csi2 " + std::to_string(id);
MediaEntity *csi2 = cio2_->getEntityByName(csi2Name);
/*
* This shall not happen, as the device enumerator matched
* all entities described in the cio2_dm DeviceMatch.
*
* As this check is basically free, better stay safe than sorry.
*/
if (!csi2)
continue;
const std::vector<MediaPad *> &pads = csi2->pads();
if (pads.empty())
continue;
/* IPU3 CSI-2 receivers have a single sink pad at index 0. */
MediaPad *sink = pads[0];
const std::vector<MediaLink *> &links = sink->links();
if (links.empty())
continue;
/*
* Verify that the receiver is connected to a sensor, enable
* the media link between the two, and create a Camera with
* a unique name.
*/
MediaLink *link = links[0];
MediaEntity *sensor = link->source()->entity();
if (sensor->function() != MEDIA_ENT_F_CAM_SENSOR)
continue;
if (link->setEnabled(true))
continue;
std::unique_ptr<IPU3CameraData> data = utils::make_unique<IPU3CameraData>();
std::string cameraName = sensor->name() + " " + std::to_string(id);
std::vector<Stream *> streams{ &data->stream_ };
std::shared_ptr<Camera> camera = Camera::create(this, cameraName, streams);
/*
* If V4L2 device creation fails, the Camera instance won't be
* registered. The 'camera' shared pointer goes out of scope
* and deletes the Camera it manages.
*/
data->dev_ = createVideoDevice(id);
if (!data->dev_) {
LOG(IPU3, Error)
<< "Failed to register camera["
<< numCameras << "] \"" << cameraName << "\"";
continue;
}
setCameraData(camera.get(), std::move(data));
registerCamera(std::move(camera));
LOG(IPU3, Info)
<< "Registered Camera[" << numCameras << "] \""
<< cameraName << "\""
<< " connected to CSI-2 receiver " << id;
numCameras++;
}
}
REGISTER_PIPELINE_HANDLER(PipelineHandlerIPU3);
} /* namespace libcamera */
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