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media: pci: tw68: Stop direct calls to queue num_buffers field

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Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.
This allows us to change how the number of buffers is computed in the
future.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
CC: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Benjamin Gaignard 2023-11-09 17:34:41 +01:00 committed by Mauro Carvalho Chehab
parent 58415c7e52
commit 70ab9ec916
1 changed files with 3 additions and 2 deletions
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5
drivers/media/pci/tw68/tw68-video.c
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@ -360,13 +360,14 @@ 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 int q_num_bufs = vb2_get_num_buffers(q);
unsigned int tot_bufs = q_num_bufs + *num_buffers;
unsigned size = (dev->fmt->depth * dev->width * dev->height) >> 3;
if (tot_bufs < 2)
tot_bufs = 2;
tot_bufs = tw68_buffer_count(size, tot_bufs);
*num_buffers = tot_bufs - q->num_buffers;
*num_buffers = tot_bufs - q_num_bufs;
/*
* We allow create_bufs, but only if the sizeimage is >= as the
* current sizeimage. The tw68_buffer_count calculation becomes quite