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Message-ID: <c15ddc52-1ba6-4650-ada3-b5cbddfa125a@xs4all.nl>
Date:   Tue, 19 Sep 2023 16:15:56 +0200
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User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v7 36/49] media: test-drivers: Stop direct calls to queue
 num_buffers field
Content-Language: en-US, nl
To:     Benjamin Gaignard <benjamin.gaignard@collabora.com>,
        mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com,
        ming.qian@nxp.com, ezequiel@vanguardiasur.com.ar,
        p.zabel@pengutronix.de, gregkh@linuxfoundation.org,
        nicolas.dufresne@collabora.com
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org,
        linux-rockchip@lists.infradead.org, linux-staging@lists.linux.dev,
        kernel@collabora.com
References: <20230914133323.198857-1-benjamin.gaignard@collabora.com>
 <20230914133323.198857-37-benjamin.gaignard@collabora.com>
From:   Hans Verkuil <hverkuil-cisco@xs4all.nl>
In-Reply-To: <20230914133323.198857-37-benjamin.gaignard@collabora.com>
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Precedence: bulk

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@collabora.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