Hi Hans,
Thank you for the patch.
On Mon, Sep 02, 2024 at 04:04:55PM +0200, Hans Verkuil wrote:
> If the wait_prepare or wait_finish callback is set, then call it.
> If it is NULL and the queue lock pointer is not NULL, then just
> unlock/lock that mutex.
>
> This allows simplifying drivers by dropping the wait_prepare and
> wait_finish ops (and eventually the vb2_ops_wait_prepare/finish helpers).
>
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
> ---
> drivers/media/common/videobuf2/videobuf2-core.c | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
> index 6335ac7b771a..d064e0664851 100644
> --- a/drivers/media/common/videobuf2/videobuf2-core.c
> +++ b/drivers/media/common/videobuf2/videobuf2-core.c
> @@ -2035,7 +2035,10 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
> * become ready or for streamoff. Driver's lock is released to
> * allow streamoff or qbuf to be called while waiting.
> */
> - call_void_qop(q, wait_prepare, q);
> + if (q->ops->wait_prepare)
> + call_void_qop(q, wait_prepare, q);
> + else if (q->lock)
> + mutex_unlock(q->lock);
How about calling vb2_ops_wait_prepare() here ? I think that would be
more explicit. You would likely need to move the function to
videobuf2-core.c. Same below for wait_finish.
>
> /*
> * All locks have been released, it is safe to sleep now.
> @@ -2045,12 +2048,16 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
> !list_empty(&q->done_list) || !q->streaming ||
> q->error);
>
> + if (q->ops->wait_finish)
> + call_void_qop(q, wait_finish, q);
> + else if (q->lock)
> + mutex_lock(q->lock);
> +
> + q->waiting_in_dqbuf = 0;
> /*
> * We need to reevaluate both conditions again after reacquiring
> * the locks or return an error if one occurred.
> */
> - call_void_qop(q, wait_finish, q);
> - q->waiting_in_dqbuf = 0;
> if (ret) {
> dprintk(q, 1, "sleep was interrupted\n");
> return ret;
--
Regards,
Laurent Pinchart
