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[v4,3/4] v4l2-utils: Add VIDIOC_DELETE_BUFS ioctl

Message ID 20231027084732.17528-4-benjamin.gaignard@collabora.com
State Superseded
Headers show
Series v4l2-compliance: Add tests for DELETE_BUFS | expand

Commit Message

Benjamin Gaignard Oct. 27, 2023, 8:47 a.m. UTC 
Add VIDIOC_DELETE_BUFS ioctl and it associated structure.
Define V4L2_BUF_CAP_SUPPORTS_DELETE_BUFS to signal that queue support
feature.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 include/linux/videodev2.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
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Patch

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index e7312cfb..25690223 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -992,6 +992,7 @@  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_DELETE_BUFS		(1 << 8)
 
 /**
  * struct v4l2_plane - plane info for multi-planar buffers
@@ -2562,6 +2563,20 @@  struct v4l2_create_buffers {
 	__u32			reserved[5];
 };
 
+/**
+ * struct v4l2_delete_buffers - VIDIOC_DELETE_BUFS argument
+ * @index:	the first buffer to be deleted
+ * @count:	number of buffers to delete
+ * @type:	enum v4l2_buf_type
+ * @reserved:	future extensions
+ */
+struct v4l2_delete_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
  *
@@ -2661,6 +2676,7 @@  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_DELETE_BUFS	_IOWR('V', 104, struct v4l2_delete_buffers)
 
 /* Reminder: when adding new ioctls please add support for them to
    drivers/media/v4l2-core/v4l2-compat-ioctl32.c as well! */