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| author |  Benjamin Gaignard <benjamin.gaignard@collabora.com>
| 2024-03-14 16:32:24 +0100 |
|---|---|---|
| committer |  Hans Verkuil <hverkuil-cisco@xs4all.nl>
| 2024-03-25 12:00:44 +0100 |
| commit | a3293a85381ec9680aa2929547fbc76c5d87a1b2 (patch) | |
| tree | 775ded5621e70cec625921830c48dc3d2c97faae /include/media | |
| parent | media: core: Free range of buffers (diff) | |
| download | linux-a3293a85381ec9680aa2929547fbc76c5d87a1b2.tar.gz linux-a3293a85381ec9680aa2929547fbc76c5d87a1b2.tar.bz2 linux-a3293a85381ec9680aa2929547fbc76c5d87a1b2.zip | |
media: v4l2: Add REMOVE_BUFS ioctl
VIDIOC_REMOVE_BUFS ioctl allows to remove buffers from a queue.
The number of buffers to remove in given by count field of
struct v4l2_remove_buffers and the range start at the index
specified in the same structure.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: vidioc-remove-bufs.rst: mention no bufs are freed on error]
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-ioctl.h | 4 | ||||
| -rw-r--r-- | include/media/videobuf2-core.h | 10 | ||||
| -rw-r--r-- | include/media/videobuf2-v4l2.h | 2 |
3 files changed, 16 insertions, 0 deletions
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h index edb733f21604..bdbb7e542321 100644 --- a/include/media/v4l2-ioctl.h +++ b/include/media/v4l2-ioctl.h @@ -163,6 +163,8 @@ struct v4l2_fh; * :ref:`VIDIOC_CREATE_BUFS <vidioc_create_bufs>` ioctl * @vidioc_prepare_buf: pointer to the function that implements * :ref:`VIDIOC_PREPARE_BUF <vidioc_prepare_buf>` ioctl + * @vidioc_remove_bufs: pointer to the function that implements + * :ref:`VIDIOC_REMOVE_BUFS <vidioc_remove_bufs>` ioctl * @vidioc_overlay: pointer to the function that implements * :ref:`VIDIOC_OVERLAY <vidioc_overlay>` ioctl * @vidioc_g_fbuf: pointer to the function that implements @@ -422,6 +424,8 @@ struct v4l2_ioctl_ops { struct v4l2_create_buffers *b); int (*vidioc_prepare_buf)(struct file *file, void *fh, struct v4l2_buffer *b); + int (*vidioc_remove_bufs)(struct file *file, void *fh, + struct v4l2_remove_buffers *d); int (*vidioc_overlay)(struct file *file, void *fh, unsigned int i); int (*vidioc_g_fbuf)(struct file *file, void *fh, diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index b9333e2c7797..955237ac503d 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -871,6 +871,16 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, int vb2_core_prepare_buf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb); /** + * vb2_core_remove_bufs() - + * @q: pointer to &struct vb2_queue with videobuf2 queue. + * @start: first index of the range of buffers to remove. + * @count: number of buffers to remove. + * + * Return: returns zero on success; an error code otherwise. + */ +int vb2_core_remove_bufs(struct vb2_queue *q, unsigned int start, unsigned int count); + +/** * vb2_core_qbuf() - Queue a buffer from userspace * * @q: pointer to &struct vb2_queue with videobuf2 queue. diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h index 5a845887850b..77ce8238ab30 100644 --- a/include/media/videobuf2-v4l2.h +++ b/include/media/videobuf2-v4l2.h @@ -334,6 +334,8 @@ int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i); int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i); int vb2_ioctl_expbuf(struct file *file, void *priv, struct v4l2_exportbuffer *p); +int vb2_ioctl_remove_bufs(struct file *file, void *priv, + struct v4l2_remove_buffers *p); /* struct v4l2_file_operations helpers */ |