libcamera: ipu3: cio2: Generate start of frame event

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

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/src/libcamera/pipeline/ipu3/cio2.cpp b/src/libcamera/pipeline/ipu3/cio2.cpp
index c7fabb98..0ef3bc04 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();