From a3293a85381ec9680aa2929547fbc76c5d87a1b2 Mon Sep 17 00:00:00 2001 From: Benjamin Gaignard Date: Thu, 14 Mar 2024 16:32:24 +0100 Subject: 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 Reviewed-by: Mauro Carvalho Chehab Signed-off-by: Hans Verkuil [hverkuil: vidioc-remove-bufs.rst: mention no bufs are freed on error] --- include/uapi/linux/videodev2.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/uapi/linux/videodev2.h') diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index a8015e5e7fa4..2663213b76a4 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -1036,6 +1036,7 @@ struct v4l2_requestbuffers { #define V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF (1 << 5) #define V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS (1 << 6) #define V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS (1 << 7) +#define V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS (1 << 8) /** * struct v4l2_plane - plane info for multi-planar buffers @@ -2624,6 +2625,20 @@ struct v4l2_create_buffers { __u32 reserved[5]; }; +/** + * struct v4l2_remove_buffers - VIDIOC_REMOVE_BUFS argument + * @index: the first buffer to be removed + * @count: number of buffers to removed + * @type: enum v4l2_buf_type + * @reserved: future extensions + */ +struct v4l2_remove_buffers { + __u32 index; + __u32 count; + __u32 type; + __u32 reserved[13]; +}; + /* * I O C T L C O D E S F O R V I D E O D E V I C E S * @@ -2723,6 +2738,8 @@ struct v4l2_create_buffers { #define VIDIOC_DBG_G_CHIP_INFO _IOWR('V', 102, struct v4l2_dbg_chip_info) #define VIDIOC_QUERY_EXT_CTRL _IOWR('V', 103, struct v4l2_query_ext_ctrl) +#define VIDIOC_REMOVE_BUFS _IOWR('V', 104, struct v4l2_remove_buffers) + /* Reminder: when adding new ioctls please add support for them to drivers/media/v4l2-core/v4l2-compat-ioctl32.c as well! */ -- cgit v1.2.3