Hi Kieran,
On Friday 04 Aug 2017 17:08:34 Kieran Bingham wrote:
> On 04/08/17 17:03, Laurent Pinchart wrote:
> > On Friday 04 Aug 2017 16:57:05 Kieran Bingham wrote:
> >> Presently any received buffers are only released back to vb2 if
> >> vsp1_video_stop_streaming() is called. If vsp1_video_start_streaming()
> >> encounters an error, we will be warned by the vb2 handlers that buffers
> >> have not been returned.
> >>
> >> Move the buffer cleanup code to it's own function to prevent duplication
> >
> > s/it's/its/
>
> Ah yes - I'm always terrible with my its'y bits.
>
> >> and call from both vsp1_video_stop_streaming() and the error path in
> >> vsp1_video_start_streaming()
> >
> > s/$/./
>
> :D
>
> >> Signed-off-by: Kieran Bingham <[email protected]>
> >> ---
> >>
> >> drivers/media/platform/vsp1/vsp1_video.c | 22 +++++++++++++++-------
> >> 1 file changed, 15 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/media/platform/vsp1/vsp1_video.c
> >> b/drivers/media/platform/vsp1/vsp1_video.c index
> >> 5af3486afe07..a24033429cd7
> >> 100644
> >> --- a/drivers/media/platform/vsp1/vsp1_video.c
> >> +++ b/drivers/media/platform/vsp1/vsp1_video.c
> >> @@ -822,6 +822,19 @@ static int vsp1_video_setup_pipeline(struct
> >> vsp1_pipeline *pipe)
> >> return 0;
> >> }
> >>
> >> +static void vsp1_video_cleanup_pipeline(struct vsp1_video *video)
> >
> > Should this function take a pipe pointer instead of a video pointer for
> > symmetry with vsp1_video_setup_pipeline() ?
>
> I passed this way because the cleanup needed a *video.
>
> Is it possible to get from a *pipe to a *video?
Yes, pipe->output->video
> >> +{
> >> + struct vsp1_vb2_buffer *buffer;
> >> + unsigned long flags;
> >> +
> >> + /* Remove all buffers from the IRQ queue. */
> >> + spin_lock_irqsave(&video->irqlock, flags);
> >> + list_for_each_entry(buffer, &video->irqqueue, queue)
> >> + vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
> >> + INIT_LIST_HEAD(&video->irqqueue);
> >> + spin_unlock_irqrestore(&video->irqlock, flags);
> >> +}
[snip]
> >> @@ -893,12 +906,7 @@ static void vsp1_video_stop_streaming(struct
> >> vb2_queue
> >> *vq) media_pipeline_stop(&video->video.entity);
> >>
> >> vsp1_video_pipeline_put(pipe);
> >>
> >> - /* Remove all buffers from the IRQ queue. */
> >> - spin_lock_irqsave(&video->irqlock, flags);
> >> - list_for_each_entry(buffer, &video->irqqueue, queue)
> >> - vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
> >> - INIT_LIST_HEAD(&video->irqqueue);
> >> - spin_unlock_irqrestore(&video->irqlock, flags);
> >> + vsp1_video_cleanup_pipeline(video);
> >
> > The vsp1_video_cleanup_pipeline() call should go before
> > vsp1_video_pipeline_put(), as you've noticed in patch 7/7.
>
> I chose to do the move in 3/7 so that this patch did not change the existing
> functionality.
>
> There is no (explicit) need for the cleanup to happen before the
> pipeline_put() until the cleanup function references the pipe...
Except if you pass a *pipe to the cleanup function, as
vsp1_video_pipeline_put() can free the pipe.
> > With all that fixed,
> >
> > Reviewed-by: Laurent Pinchart <[email protected]>
> >
> >> }
> >>
> >> static const struct vb2_ops vsp1_video_queue_qops = {
--
Regards,
Laurent Pinchart
