Re: [PATCH v7 26/49] media: pci: tw68: Stop direct calls to queue num_buffers field

[Hans Verkuil]

On 14/09/2023 15:33, Benjamin Gaignard wrote:
> Use vb2_get_num_buffers() to avoid using queue num_buffer field directly.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
> ---
>  drivers/media/pci/tw68/tw68-video.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/pci/tw68/tw68-video.c b/drivers/media/pci/tw68/tw68-video.c
> index 773a18702d36..35296c226019 100644
> --- a/drivers/media/pci/tw68/tw68-video.c
> +++ b/drivers/media/pci/tw68/tw68-video.c
> @@ -360,13 +360,13 @@ static int tw68_queue_setup(struct vb2_queue *q,
>  			   unsigned int sizes[], struct device *alloc_devs[])
>  {
>  	struct tw68_dev *dev = vb2_get_drv_priv(q);
> -	unsigned tot_bufs = q->num_buffers + *num_buffers;
> +	unsigned tot_bufs = vb2_get_num_buffers(q) + *num_buffers;
>  	unsigned size = (dev->fmt->depth * dev->width * dev->height) >> 3;
>  
>  	if (tot_bufs < 2)
>  		tot_bufs = 2;

This check can be dropped since vidq.min_buffers_needed is already set to 2.

>  	tot_bufs = tw68_buffer_count(size, tot_bufs);
> -	*num_buffers = tot_bufs - q->num_buffers;
> +	*num_buffers = tot_bufs - vb2_get_num_buffers(q);
>  	/*
>  	 * We allow create_bufs, but only if the sizeimage is >= as the
>  	 * current sizeimage. The tw68_buffer_count calculation becomes quite

Otherwise this is fine.

Regards,

	Hans