[libcamera-devel] [PATCH] pipeline: imx8-isi: Set SensorTimestamp metadata

[Laurent Pinchart]

Report the sensor timestamp in metadata. Use the timestamp from the
first buffer. Accuracy could be improved by using the frame start event
from the CSI-2 receiver, but the kernel driver doesn't support it yet.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/libcamera/pipeline/imx8-isi/imx8-isi.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp b/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp
index a3dfd3fc529c..e51457ebc345 100644
--- a/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp
+++ b/src/libcamera/pipeline/imx8-isi/imx8-isi.cpp
@@ -994,6 +994,12 @@ void PipelineHandlerISI::bufferReady(FrameBuffer *buffer)
 {
 	Request *request = buffer->request();
 
+	/* Record the sensor's timestamp in the request metadata. */
+	ControlList &metadata = request->metadata();
+	if (!metadata.contains(controls::SensorTimestamp.id()))
+		metadata.set(controls::SensorTimestamp,
+			     buffer->metadata().timestamp);
+
 	completeBuffer(request, buffer);
 	if (request->hasPendingBuffers())
 		return;
-- 
Regards,

Laurent Pinchart