ipa: rkisp1: add FrameDurationLimits control

Currently, the Android HAL does not work on rkisp1-based devices because
required FrameDurationLimits metadata is missing from the IPA
implementation.

This change sets FrameDurationLimits for rkisp1 based on the existing
ipu3 implementation, using the sensor's reported range of vertical
blanking intervals with the minimum reported horizontal blanking
interval.

Signed-off-by: Nicholas Roth <nicholas@rothemail.net>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/ipa/rkisp1.mojom

@@ -15,14 +15,16 @@ struct IPAConfigInfo {
 
 interface IPARkISP1Interface {
 	init(libcamera.IPASettings settings,
-	     uint32 hwRevision)
+	     uint32 hwRevision,
+	     libcamera.IPACameraSensorInfo sensorInfo,
+	     libcamera.ControlInfoMap sensorControls)
 		=> (int32 ret, libcamera.ControlInfoMap ipaControls);
 	start() => (int32 ret);
 	stop();
 
 	configure(IPAConfigInfo configInfo,
 		  map<uint32, libcamera.IPAStream> streamConfig)
-		=> (int32 ret);
+		=> (int32 ret, libcamera.ControlInfoMap ipaControls);
 
 	mapBuffers(array<libcamera.IPABuffer> buffers);
 	unmapBuffers(array<uint32> ids);

src/ipa/rkisp1/rkisp1.cpp

@@ -49,12 +49,15 @@ public:
 	IPARkISP1();
 
 	int init(const IPASettings &settings, unsigned int hwRevision,
+		 const IPACameraSensorInfo &sensorInfo,
+		 const ControlInfoMap &sensorControls,
 		 ControlInfoMap *ipaControls) override;
 	int start() override;
 	void stop() override;
 
 	int configure(const IPAConfigInfo &ipaConfig,
-		      const std::map<uint32_t, IPAStream> &streamConfig) override;
+		      const std::map<uint32_t, IPAStream> &streamConfig,
+		      ControlInfoMap *ipaControls) override;
 	void mapBuffers(const std::vector<IPABuffer> &buffers) override;
 	void unmapBuffers(const std::vector<unsigned int> &ids) override;
 
@@ -67,6 +70,9 @@ protected:
 	std::string logPrefix() const override;
 
 private:
+	void updateControls(const IPACameraSensorInfo &sensorInfo,
+			    const ControlInfoMap &sensorControls,
+			    ControlInfoMap *ipaControls);
 	void setControls(unsigned int frame);
 
 	std::map<unsigned int, FrameBuffer> buffers_;
@@ -114,6 +120,8 @@ std::string IPARkISP1::logPrefix() const
 }
 
 int IPARkISP1::init(const IPASettings &settings, unsigned int hwRevision,
+		    const IPACameraSensorInfo &sensorInfo,
+		    const ControlInfoMap &sensorControls,
 		    ControlInfoMap *ipaControls)
 {
 	/* \todo Add support for other revisions */
@@ -179,9 +187,8 @@ int IPARkISP1::init(const IPASettings &settings, unsigned int hwRevision,
 	if (ret)
 		return ret;
 
-	/* Return the controls handled by the IPA. */
+	/* Initialize controls. */
-	ControlInfoMap::Map ctrlMap = rkisp1Controls;
+	updateControls(sensorInfo, sensorControls, ipaControls);
-	*ipaControls = ControlInfoMap(std::move(ctrlMap), controls::controls);
 
 	return 0;
 }
@@ -199,7 +206,8 @@ void IPARkISP1::stop()
 }
 
 int IPARkISP1::configure(const IPAConfigInfo &ipaConfig,
-			 [[maybe_unused]] const std::map<uint32_t, IPAStream> &streamConfig)
+			 [[maybe_unused]] const std::map<uint32_t, IPAStream> &streamConfig,
+			 ControlInfoMap *ipaControls)
 {
 	sensorControls_ = ipaConfig.sensorControls;
 
@@ -229,6 +237,9 @@ int IPARkISP1::configure(const IPAConfigInfo &ipaConfig,
 	context_.configuration.sensor.size = info.outputSize;
 	context_.configuration.sensor.lineDuration = info.minLineLength * 1.0s / info.pixelRate;
 
+	/* Update the camera controls using the new sensor settings. */
+	updateControls(info, sensorControls_, ipaControls);
+
 	/*
 	 * When the AGC computes the new exposure values for a frame, it needs
 	 * to know the limits for shutter speed and analogue gain.
@@ -331,6 +342,42 @@ void IPARkISP1::processStatsBuffer(const uint32_t frame, const uint32_t bufferId
 	metadataReady.emit(frame, metadata);
 }
 
+void IPARkISP1::updateControls(const IPACameraSensorInfo &sensorInfo,
+			       const ControlInfoMap &sensorControls,
+			       ControlInfoMap *ipaControls)
+{
+	ControlInfoMap::Map ctrlMap = rkisp1Controls;
+
+	/*
+	 * Compute the frame duration limits.
+	 *
+	 * The frame length is computed assuming a fixed line length combined
+	 * with the vertical frame sizes.
+	 */
+	const ControlInfo &v4l2HBlank = sensorControls.find(V4L2_CID_HBLANK)->second;
+	uint32_t hblank = v4l2HBlank.def().get<int32_t>();
+	uint32_t lineLength = sensorInfo.outputSize.width + hblank;
+
+	const ControlInfo &v4l2VBlank = sensorControls.find(V4L2_CID_VBLANK)->second;
+	std::array<uint32_t, 3> frameHeights{
+		v4l2VBlank.min().get<int32_t>() + sensorInfo.outputSize.height,
+		v4l2VBlank.max().get<int32_t>() + sensorInfo.outputSize.height,
+		v4l2VBlank.def().get<int32_t>() + sensorInfo.outputSize.height,
+	};
+
+	std::array<int64_t, 3> frameDurations;
+	for (unsigned int i = 0; i < frameHeights.size(); ++i) {
+		uint64_t frameSize = lineLength * frameHeights[i];
+		frameDurations[i] = frameSize / (sensorInfo.pixelRate / 1000000U);
+	}
+
+	ctrlMap[&controls::FrameDurationLimits] = ControlInfo(frameDurations[0],
+							      frameDurations[1],
+							      frameDurations[2]);
+
+	*ipaControls = ControlInfoMap(std::move(ctrlMap), controls::controls);
+}
+
 void IPARkISP1::setControls(unsigned int frame)
 {
 	/*

src/libcamera/pipeline/rkisp1/rkisp1.cpp

@@ -347,8 +347,15 @@ int RkISP1CameraData::loadIPA(unsigned int hwRevision)
 		ipaTuningFile = std::string(configFromEnv);
 	}
 
-	int ret = ipa_->init({ ipaTuningFile, sensor_->model() }, hwRevision,
+	IPACameraSensorInfo sensorInfo{};
-			     &controlInfo_);
+	int ret = sensor_->sensorInfo(&sensorInfo);
+	if (ret) {
+		LOG(RkISP1, Error) << "Camera sensor information not available";
+		return ret;
+	}
+
+	ret = ipa_->init({ ipaTuningFile, sensor_->model() }, hwRevision,
+			 sensorInfo, sensor_->controls(), &controlInfo_);
 	if (ret < 0) {
 		LOG(RkISP1, Error) << "IPA initialization failure";
 		return ret;
@@ -718,14 +725,12 @@ int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 	ipa::rkisp1::IPAConfigInfo ipaConfig{};
 
 	ret = data->sensor_->sensorInfo(&ipaConfig.sensorInfo);
-	if (ret) {
+	if (ret)
-		LOG(RkISP1, Error) << "Camera sensor information not available";
 		return ret;
-	}
 
 	ipaConfig.sensorControls = data->sensor_->controls();
 
-	ret = data->ipa_->configure(ipaConfig, streamConfig);
+	ret = data->ipa_->configure(ipaConfig, streamConfig, &data->controlInfo_);
 	if (ret) {
 		LOG(RkISP1, Error) << "failed configuring IPA (" << ret << ")";
 		return ret;