On Thu, Mar 31, 2022 at 03:37:04PM -0400, Nicolas Dufresne wrote:
> If the timestamp of the src buffer differs from the timestamp of a held
> dst buffer, the held buffer is implicitly removed and marked as done.
> Add a trace to help debugging if someone hits that case.
>
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
> Reviewed-by: Sebastian Fricke <sebastian.fricke@xxxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-mem2mem.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
> index 675e22895ebe..fbcd79763e8f 100644
> --- a/drivers/media/v4l2-core/v4l2-mem2mem.c
> +++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
> @@ -336,6 +336,7 @@ static void __v4l2_m2m_try_queue(struct v4l2_m2m_dev *m2m_dev,
> if (src && dst && dst->is_held &&
> dst->vb2_buf.copied_timestamp &&
> dst->vb2_buf.timestamp != src->vb2_buf.timestamp) {
> + dprintk("src and dst timestamp mismatch, removing held capture buffer.\n");
Nitpick: I would try to make this log consistent with the other logs,
avoid refering to "src" and "dst" and start with a capital letter.
How about "Timestamp mismatch, returning held capture buffer".
Either way, thanks for improving this.
Reviewed-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>
> dst->is_held = false;
> v4l2_m2m_dst_buf_remove(m2m_ctx);
> v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
> --
> 2.34.1
>
