ipa: raspberrypi Store the target string in the controller

The target string may be used by algorithms to determine the running
hardware target.

Store the target string provided by the camera tuning files in the
controller state. Add a getTarget() member function to retrieve this
string.

Validate the correct hardware target ("bcm2835") during the IPA
initialisation phase.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

4 files changed, 22 insertions, 0 deletions

diff --git a/src/ipa/raspberrypi/controller/algorithm.h b/src/ipa/raspberrypi/controller/algorithm.h
index 4f327598..7c22fbe4 100644
--- a/src/ipa/raspberrypi/controller/algorithm.h
+++ b/src/ipa/raspberrypi/controller/algorithm.h
@@ -41,6 +41,10 @@ public:
 	{
 		return controller_->getGlobalMetadata();
 	}
+	const std::string &getTarget() const
+	{
+		return controller_->getTarget();
+	}
 
 private:
 	Controller *controller_;
diff --git a/src/ipa/raspberrypi/controller/controller.cpp b/src/ipa/raspberrypi/controller/controller.cpp
index e9156785..a6250ee1 100644
--- a/src/ipa/raspberrypi/controller/controller.cpp
+++ b/src/ipa/raspberrypi/controller/controller.cpp
@@ -38,6 +38,7 @@ int Controller::read(char const *filename)
 
 	std::unique_ptr<YamlObject> root = YamlParser::parse(file);
 	double version = (*root)["version"].get<double>(1.0);
+	target_ = (*root)["target"].get<std::string>("bcm2835");
 
 	if (version < 2.0) {
 		LOG(RPiController, Warning)
@@ -142,3 +143,8 @@ Algorithm *Controller::getAlgorithm(std::string const &name) const
 	}
 	return nullptr;
 }
+
+const std::string &Controller::getTarget() const
+{
+	return target_;
+}
diff --git a/src/ipa/raspberrypi/controller/controller.h b/src/ipa/raspberrypi/controller/controller.h
index e6c950c3..24e02903 100644
--- a/src/ipa/raspberrypi/controller/controller.h
+++ b/src/ipa/raspberrypi/controller/controller.h
@@ -46,6 +46,7 @@ public:
 	void process(StatisticsPtr stats, Metadata *imageMetadata);
 	Metadata &getGlobalMetadata();
 	Algorithm *getAlgorithm(std::string const &name) const;
+	const std::string &getTarget() const;
 
 protected:
 	int createAlgorithm(const std::string &name, const libcamera::YamlObject &params);
@@ -53,6 +54,9 @@ protected:
 	Metadata globalMetadata_;
 	std::vector<AlgorithmPtr> algorithms_;
 	bool switchModeCalled_;
+
+private:
+	std::string target_;
 };
 
 } /* namespace RPiController */
diff --git a/src/ipa/raspberrypi/raspberrypi.cpp b/src/ipa/raspberrypi/raspberrypi.cpp
index 66a020d0..92c65a2c 100644
--- a/src/ipa/raspberrypi/raspberrypi.cpp
+++ b/src/ipa/raspberrypi/raspberrypi.cpp
@@ -266,6 +266,14 @@ int IPARPi::init(const IPASettings &settings, bool lensPresent, IPAInitResult *r
 		return ret;
 	}
 
+	const std::string &target = controller_.getTarget();
+	if (target != "bcm2835") {
+		LOG(IPARPI, Error)
+			<< "Tuning data file target returned \"" << target << "\""
+			<< ", expected \"bcm2835\"";
+		return -EINVAL;
+	}
+
 	lensPresent_ = lensPresent;
 
 	controller_.initialise();