[libcamera-devel] [RFC PATCH v2] libcamera: pipeline: ipu3: Apply the requested test pattern mode

[Hirokazu Honda]

This enables ipu3 pipeline handler to apply the test pattern mode
per frame.

Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
---
 src/libcamera/pipeline/ipu3/ipu3.cpp | 38 ++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index 92e86925..07fda65f 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -69,6 +69,7 @@ public:
 	void statBufferReady(FrameBuffer *buffer);
 	void queuePendingRequests();
 	void cancelPendingRequests();
+	void frameStart(uint32_t sequence);
 
 	CIO2Device cio2_;
 	ImgUDevice *imgu_;
@@ -88,6 +89,7 @@ public:
 	std::unique_ptr<ipa::ipu3::IPAProxyIPU3> ipa_;
 
 	std::queue<Request *> pendingRequests_;
+	std::queue<Request *> processingRequests_;
 
 	ControlInfoMap ipaControls_;
 
@@ -568,6 +570,8 @@ int PipelineHandlerIPU3::configure(Camera *camera, CameraConfiguration *c)
 	cio2->sensor()->sensorInfo(&sensorInfo);
 	data->cropRegion_ = sensorInfo.analogCrop;
 
+	cio2->sensor()->setTestPatternMode(controls::draft::TestPatternModeOff);
+
 	/*
 	 * Configure the H/V flip controls based on the combination of
 	 * the sensor and user transform.
@@ -801,6 +805,9 @@ void PipelineHandlerIPU3::stop(Camera *camera)
 
 	ret |= data->imgu_->stop();
 	ret |= data->cio2_.stop();
+
+	data->processingRequests_ = {};
+
 	if (ret)
 		LOG(IPU3, Warning) << "Failed to stop camera " << camera->id();
 
@@ -851,6 +858,8 @@ void IPU3CameraData::queuePendingRequests()
 
 		info->rawBuffer = rawBuffer;
 
+		processingRequests_.push(request);
+
 		ipa::ipu3::IPU3Event ev;
 		ev.op = ipa::ipu3::EventProcessControls;
 		ev.frame = info->id;
@@ -1107,8 +1116,8 @@ int PipelineHandlerIPU3::registerCameras()
 		data->delayedCtrls_ =
 			std::make_unique<DelayedControls>(cio2->sensor()->device(),
 							  params);
-		data->cio2_.frameStart().connect(data->delayedCtrls_.get(),
-						 &DelayedControls::applyControls);
+		data->cio2_.frameStart().connect(data.get(),
+						 &IPU3CameraData::frameStart);
 
 		/* Convert the sensor rotation to a transformation */
 		int32_t rotation = 0;
@@ -1399,6 +1408,31 @@ void IPU3CameraData::statBufferReady(FrameBuffer *buffer)
 	ipa_->processEvent(ev);
 }
 
+void IPU3CameraData::frameStart(uint32_t sequence)
+{
+	if (!processingRequests_.empty()) {
+		/* Assumes applying the test pattern mode affects immediately. */
+		Request *request = processingRequests_.front();
+		processingRequests_.pop();
+
+		if (request->controls().contains(controls::draft::TestPatternMode)) {
+			const int32_t testPatternMode = request->controls().get(
+				controls::draft::TestPatternMode);
+
+			int ret = cio2_.sensor()->setTestPatternMode(testPatternMode);
+			if (ret) {
+				LOG(IPU3, Error) << "Failed to set test pattern mode: "
+						 << ret;
+			} else {
+				request->metadata().set(controls::draft::TestPatternMode,
+							testPatternMode);
+			}
+		}
+	}
+
+	delayedCtrls_->applyControls(sequence);
+}
+
 REGISTER_PIPELINE_HANDLER(PipelineHandlerIPU3)
 
 } /* namespace libcamera */
-- 
2.33.0.800.g4c38ced690-goog