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Date: Thu, 21 Mar 2024 15:15:45 +0100
From: Mauro Carvalho Chehab <mchehab@kernel.org>
To: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Cc: tfiga@chromium.org, m.szyprowski@samsung.com,
 ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
 hverkuil-cisco@xs4all.nl, nicolas@ndufresne.ca,
 linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-rockchip@lists.infradead.org, kernel@collabora.com
Subject: Re: [PATCH v21 8/9] media: v4l2: Add mem2mem helpers for
 REMOVE_BUFS ioctl
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In-Reply-To: <20240314153226.197445-9-benjamin.gaignard@collabora.com>
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	<20240314153226.197445-9-benjamin.gaignard@collabora.com>
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Em Thu, 14 Mar 2024 16:32:25 +0100
Benjamin Gaignard <benjamin.gaignard@collabora.com> escreveu:

> Create v4l2-mem2mem helpers for VIDIOC_REMOVE_BUFS ioctl and
> make test drivers use it.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>

LGTM.

Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>

> ---
> changes in version 21:
> - In v4l2_m2m_ioctl_remove_bufs() check if the queue exists and
>   if it type macth request type.
> - Do not set vidioc_remove_bufs for vim2m driver.
> 
>  drivers/media/test-drivers/vicodec/vicodec-core.c |  1 +
>  drivers/media/test-drivers/vimc/vimc-capture.c    |  1 +
>  drivers/media/test-drivers/visl/visl-video.c      |  1 +
>  drivers/media/test-drivers/vivid/vivid-core.c     |  1 +
>  drivers/media/v4l2-core/v4l2-mem2mem.c            | 15 +++++++++++++++
>  include/media/v4l2-mem2mem.h                      |  2 ++
>  6 files changed, 21 insertions(+)
> 
> diff --git a/drivers/media/test-drivers/vicodec/vicodec-core.c b/drivers/media/test-drivers/vicodec/vicodec-core.c
> index e13f5452b927..3e011fe62ae1 100644
> --- a/drivers/media/test-drivers/vicodec/vicodec-core.c
> +++ b/drivers/media/test-drivers/vicodec/vicodec-core.c
> @@ -1345,6 +1345,7 @@ static const struct v4l2_ioctl_ops vicodec_ioctl_ops = {
>  	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
>  	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
>  	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
> +	.vidioc_remove_bufs	= v4l2_m2m_ioctl_remove_bufs,
>  
>  	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
>  	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,
> diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
> index 97693561f1e4..ba7550b8ba7e 100644
> --- a/drivers/media/test-drivers/vimc/vimc-capture.c
> +++ b/drivers/media/test-drivers/vimc/vimc-capture.c
> @@ -221,6 +221,7 @@ static const struct v4l2_ioctl_ops vimc_capture_ioctl_ops = {
>  	.vidioc_expbuf = vb2_ioctl_expbuf,
>  	.vidioc_streamon = vb2_ioctl_streamon,
>  	.vidioc_streamoff = vb2_ioctl_streamoff,
> +	.vidioc_remove_bufs = vb2_ioctl_remove_bufs,
>  };
>  
>  static void vimc_capture_return_all_buffers(struct vimc_capture_device *vcapture,
> diff --git a/drivers/media/test-drivers/visl/visl-video.c b/drivers/media/test-drivers/visl/visl-video.c
> index b9a4b44bd0ed..f8d970319764 100644
> --- a/drivers/media/test-drivers/visl/visl-video.c
> +++ b/drivers/media/test-drivers/visl/visl-video.c
> @@ -539,6 +539,7 @@ const struct v4l2_ioctl_ops visl_ioctl_ops = {
>  	.vidioc_prepare_buf		= v4l2_m2m_ioctl_prepare_buf,
>  	.vidioc_create_bufs		= v4l2_m2m_ioctl_create_bufs,
>  	.vidioc_expbuf			= v4l2_m2m_ioctl_expbuf,
> +	.vidioc_remove_bufs		= v4l2_m2m_ioctl_remove_bufs,
>  
>  	.vidioc_streamon		= v4l2_m2m_ioctl_streamon,
>  	.vidioc_streamoff		= v4l2_m2m_ioctl_streamoff,
> diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
> index 11b8520d9f57..771392f67dda 100644
> --- a/drivers/media/test-drivers/vivid/vivid-core.c
> +++ b/drivers/media/test-drivers/vivid/vivid-core.c
> @@ -769,6 +769,7 @@ static const struct v4l2_ioctl_ops vivid_ioctl_ops = {
>  	.vidioc_expbuf			= vb2_ioctl_expbuf,
>  	.vidioc_streamon		= vb2_ioctl_streamon,
>  	.vidioc_streamoff		= vb2_ioctl_streamoff,
> +	.vidioc_remove_bufs		= vb2_ioctl_remove_bufs,
>  
>  	.vidioc_enum_input		= vivid_enum_input,
>  	.vidioc_g_input			= vivid_g_input,
> diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
> index 75517134a5e9..eb22d6172462 100644
> --- a/drivers/media/v4l2-core/v4l2-mem2mem.c
> +++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
> @@ -1386,6 +1386,21 @@ int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv,
>  }
>  EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs);
>  
> +int v4l2_m2m_ioctl_remove_bufs(struct file *file, void *priv,
> +			       struct v4l2_remove_buffers *remove)
> +{
> +	struct v4l2_fh *fh = file->private_data;
> +	struct vb2_queue *q = v4l2_m2m_get_vq(fh->m2m_ctx, remove->type);
> +
> +	if (!q)
> +		return -EINVAL;
> +	if (q->type != remove->type)
> +		return -EINVAL;
> +
> +	return vb2_core_remove_bufs(q, remove->index, remove->count);
> +}
> +EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_remove_bufs);
> +
>  int v4l2_m2m_ioctl_querybuf(struct file *file, void *priv,
>  				struct v4l2_buffer *buf)
>  {
> diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
> index 7f1af1f7f912..0af330cf91c3 100644
> --- a/include/media/v4l2-mem2mem.h
> +++ b/include/media/v4l2-mem2mem.h
> @@ -867,6 +867,8 @@ int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,
>  				struct v4l2_requestbuffers *rb);
>  int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh,
>  				struct v4l2_create_buffers *create);
> +int v4l2_m2m_ioctl_remove_bufs(struct file *file, void *priv,
> +			       struct v4l2_remove_buffers *d);
>  int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh,
>  				struct v4l2_buffer *buf);
>  int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh,


Thanks,
Mauro