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Message-ID: <14def513-1900-44e8-9b1d-154feccedf62@xs4all.nl>
Date: Tue, 19 Sep 2023 15:56:38 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: Benjamin Gaignard <benjamin.gaignard@...labora.com>,
mchehab@...nel.org, tfiga@...omium.org, m.szyprowski@...sung.com,
ming.qian@....com, ezequiel@...guardiasur.com.ar,
p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
nicolas.dufresne@...labora.com
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
kernel@...labora.com
Subject: Re: [PATCH v7 26/49] media: pci: tw68: Stop direct calls to queue
num_buffers field
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@...labora.com>
> ---
> 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
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