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Date: Tue, 19 Sep 2023 16:15:56 +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 36/49] media: test-drivers: 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/test-drivers/visl/visl-dec.c | 4 ++--
> drivers/media/test-drivers/vivid/vivid-meta-cap.c | 5 +++--
> drivers/media/test-drivers/vivid/vivid-meta-out.c | 5 +++--
> drivers/media/test-drivers/vivid/vivid-touch-cap.c | 5 +++--
> drivers/media/test-drivers/vivid/vivid-vbi-cap.c | 5 +++--
> drivers/media/test-drivers/vivid/vivid-vbi-out.c | 5 +++--
> drivers/media/test-drivers/vivid/vivid-vid-cap.c | 5 +++--
> drivers/media/test-drivers/vivid/vivid-vid-out.c | 5 +++--
> 8 files changed, 23 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c
> index ba20ea998d19..81da5dcf890a 100644
> --- a/drivers/media/test-drivers/visl/visl-dec.c
> +++ b/drivers/media/test-drivers/visl/visl-dec.c
> @@ -287,7 +287,7 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
> frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
>
> len = 0;
> - for (i = 0; i < out_q->num_buffers; i++) {
> + for (i = 0; i < out_q->max_allowed_buffers; i++) {
> char entry[] = "index: %u, state: %s, request_fd: %d, ";
> u32 old_len = len;
> struct vb2_buffer *vb2;
> @@ -347,7 +347,7 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
> frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
>
> len = 0;
> - for (i = 0; i < cap_q->num_buffers; i++) {
> + for (i = 0; i < cap_q->max_allowed_buffers; i++) {
> u32 old_len = len;
> struct vb2_buffer *vb2;
> char *q_status;
> diff --git a/drivers/media/test-drivers/vivid/vivid-meta-cap.c b/drivers/media/test-drivers/vivid/vivid-meta-cap.c
> index 780f96860a6d..646b1c6a936f 100644
> --- a/drivers/media/test-drivers/vivid/vivid-meta-cap.c
> +++ b/drivers/media/test-drivers/vivid/vivid-meta-cap.c
> @@ -18,6 +18,7 @@ static int meta_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
> struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> unsigned int size = sizeof(struct vivid_uvc_meta_buf);
>
> if (!vivid_is_webcam(dev))
> @@ -30,8 +31,8 @@ static int meta_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
> sizes[0] = size;
> }
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
>
> *nplanes = 1;
> return 0;
> diff --git a/drivers/media/test-drivers/vivid/vivid-meta-out.c b/drivers/media/test-drivers/vivid/vivid-meta-out.c
> index 95835b52b58f..4a569a6e58be 100644
> --- a/drivers/media/test-drivers/vivid/vivid-meta-out.c
> +++ b/drivers/media/test-drivers/vivid/vivid-meta-out.c
> @@ -18,6 +18,7 @@ static int meta_out_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
> struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> unsigned int size = sizeof(struct vivid_meta_out_buf);
>
> if (!vivid_is_webcam(dev))
> @@ -30,8 +31,8 @@ static int meta_out_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
> sizes[0] = size;
> }
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
>
> *nplanes = 1;
> return 0;
> diff --git a/drivers/media/test-drivers/vivid/vivid-touch-cap.c b/drivers/media/test-drivers/vivid/vivid-touch-cap.c
> index c7f6e23df51e..4b3c6ea0afde 100644
> --- a/drivers/media/test-drivers/vivid/vivid-touch-cap.c
> +++ b/drivers/media/test-drivers/vivid/vivid-touch-cap.c
> @@ -13,6 +13,7 @@ static int touch_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
> struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> struct v4l2_pix_format *f = &dev->tch_format;
> unsigned int size = f->sizeimage;
>
> @@ -23,8 +24,8 @@ static int touch_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
> sizes[0] = size;
> }
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
>
> *nplanes = 1;
> return 0;
> diff --git a/drivers/media/test-drivers/vivid/vivid-vbi-cap.c b/drivers/media/test-drivers/vivid/vivid-vbi-cap.c
> index b65b02eeeb97..fcd7f40385e9 100644
> --- a/drivers/media/test-drivers/vivid/vivid-vbi-cap.c
> +++ b/drivers/media/test-drivers/vivid/vivid-vbi-cap.c
> @@ -124,6 +124,7 @@ static int vbi_cap_queue_setup(struct vb2_queue *vq,
> unsigned sizes[], struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
> unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
> 36 * sizeof(struct v4l2_sliced_vbi_data) :
> @@ -134,8 +135,8 @@ static int vbi_cap_queue_setup(struct vb2_queue *vq,
>
> sizes[0] = size;
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
>
> *nplanes = 1;
> return 0;
> diff --git a/drivers/media/test-drivers/vivid/vivid-vbi-out.c b/drivers/media/test-drivers/vivid/vivid-vbi-out.c
> index cd56476902a2..8f0da5d88bcc 100644
> --- a/drivers/media/test-drivers/vivid/vivid-vbi-out.c
> +++ b/drivers/media/test-drivers/vivid/vivid-vbi-out.c
> @@ -20,6 +20,7 @@ static int vbi_out_queue_setup(struct vb2_queue *vq,
> unsigned sizes[], struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> bool is_60hz = dev->std_out & V4L2_STD_525_60;
> unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
> 36 * sizeof(struct v4l2_sliced_vbi_data) :
> @@ -30,8 +31,8 @@ static int vbi_out_queue_setup(struct vb2_queue *vq,
>
> sizes[0] = size;
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
>
> *nplanes = 1;
> return 0;
> diff --git a/drivers/media/test-drivers/vivid/vivid-vid-cap.c b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
> index 3a06df35a2d7..0cc7602b9fb2 100644
> --- a/drivers/media/test-drivers/vivid/vivid-vid-cap.c
> +++ b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
> @@ -77,6 +77,7 @@ static int vid_cap_queue_setup(struct vb2_queue *vq,
> unsigned sizes[], struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> unsigned buffers = tpg_g_buffers(&dev->tpg);
> unsigned h = dev->fmt_cap_rect.height;
> unsigned p;
> @@ -117,8 +118,8 @@ static int vid_cap_queue_setup(struct vb2_queue *vq,
> dev->fmt_cap->data_offset[p];
> }
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
This can be dropped, min_buffers_needed is set to 2 already.
>
> *nplanes = buffers;
>
> diff --git a/drivers/media/test-drivers/vivid/vivid-vid-out.c b/drivers/media/test-drivers/vivid/vivid-vid-out.c
> index 184a6df2c29f..25578f55a060 100644
> --- a/drivers/media/test-drivers/vivid/vivid-vid-out.c
> +++ b/drivers/media/test-drivers/vivid/vivid-vid-out.c
> @@ -25,6 +25,7 @@ static int vid_out_queue_setup(struct vb2_queue *vq,
> unsigned sizes[], struct device *alloc_devs[])
> {
> struct vivid_dev *dev = vb2_get_drv_priv(vq);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
> const struct vivid_fmt *vfmt = dev->fmt_out;
> unsigned planes = vfmt->buffers;
> unsigned h = dev->fmt_out_rect.height;
> @@ -73,8 +74,8 @@ static int vid_out_queue_setup(struct vb2_queue *vq,
> vfmt->data_offset[p] : size;
> }
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
Ditto.
>
> *nplanes = planes;
>
Regards,
Hans
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