[libcamera-devel] [PATCH v4 05/11] libcamera: ipu3: cio2: Generate start of frame event

[Niklas Söderlund]

Propagate the frameStart event whenever the CSI-2 receiver in the CIO2
pipeline generates one.

Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
* Changes since v1
- Move blank lines.
---
 src/libcamera/pipeline/ipu3/cio2.cpp | 18 +++++++++++++++---
 src/libcamera/pipeline/ipu3/cio2.h   |  3 ++-
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/libcamera/pipeline/ipu3/cio2.cpp b/src/libcamera/pipeline/ipu3/cio2.cpp
index c7fabb98cd6b3438..0ef3bc04659b4d16 100644
--- a/src/libcamera/pipeline/ipu3/cio2.cpp
+++ b/src/libcamera/pipeline/ipu3/cio2.cpp
@@ -238,15 +238,27 @@ int CIO2Device::start()
 		availableBuffers_.push(buffer.get());
 
 	ret = output_->streamOn();
-	if (ret)
+	if (ret) {
 		freeBuffers();
+		return ret;
+	}
 
-	return ret;
+	ret = csi2_->setFrameStartEnabled(true);
+	if (ret) {
+		stop();
+		return ret;
+	}
+
+	return 0;
 }
 
 int CIO2Device::stop()
 {
-	int ret = output_->streamOff();
+	int ret;
+
+	csi2_->setFrameStartEnabled(false);
+
+	ret = output_->streamOff();
 
 	freeBuffers();
 
diff --git a/src/libcamera/pipeline/ipu3/cio2.h b/src/libcamera/pipeline/ipu3/cio2.h
index dca4d40e4c32e8b2..5ecc4f47bb3cdb3f 100644
--- a/src/libcamera/pipeline/ipu3/cio2.h
+++ b/src/libcamera/pipeline/ipu3/cio2.h
@@ -13,6 +13,7 @@
 
 #include <libcamera/signal.h>
 
+#include "libcamera/internal/v4l2_subdevice.h"
 #include "libcamera/internal/v4l2_videodevice.h"
 
 namespace libcamera {
@@ -24,7 +25,6 @@ class PixelFormat;
 class Request;
 class Size;
 class SizeRange;
-class V4L2Subdevice;
 struct StreamConfiguration;
 
 class CIO2Device
@@ -54,6 +54,7 @@ public:
 	FrameBuffer *queueBuffer(Request *request, FrameBuffer *rawBuffer);
 	void tryReturnBuffer(FrameBuffer *buffer);
 	Signal<FrameBuffer *> &bufferReady() { return output_->bufferReady; }
+	Signal<uint32_t> &frameStart() { return csi2_->frameStart; }
 
 private:
 	void freeBuffers();
-- 
2.30.0