[libcamera-devel] [PATCH 05/13] libcamera: rkisp1: Report sensor timestamp

[Laurent Pinchart]

Hi Jacopo,

Thank you for the patch.

On Mon, Apr 19, 2021 at 03:14:25PM +0200, Jacopo Mondi wrote:
> Report the sensor's timestamp in the Request metadata using the
> completed buffer timestamp.
> 
> The buffer's timestamp is recorded at DMA-transfer time, and it does not
> theoretically matches the 'start of exposure' definition. Record this with
> a \todo entry.
> 
> Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  src/libcamera/pipeline/rkisp1/rkisp1.cpp | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
> index 925c8c6372e0..5c35eb7d9782 100644
> --- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
> +++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
> @@ -1069,6 +1069,15 @@ void PipelineHandlerRkISP1::bufferReady(FrameBuffer *buffer)
>  {
>  	Request *request = buffer->request();
>  
> +	/*
> +	 * Record the sensor's timestamp in the request metadata.
> +	 *
> +	 * \todo The sensor timestamp should be better estimated by connecting
> +	 * to the V4L2Device::frameStart signal.
> +	 */
> +	request->metadata().set(controls::SensorTimestamp,
> +				buffer->metadata().timestamp);
> +
>  	completeBuffer(request, buffer);
>  	tryCompleteRequest(request);
>  }

-- 
Regards,

Laurent Pinchart