[PATCH v2 6/8] media: v4l2: Add mem2mem helpers for DELETE_BUF ioctl

[Benjamin Gaignard]

Create v4l2-mem2mem helpers for VIDIOC_DELETE_BUF ioctl.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
---
 drivers/media/v4l2-core/v4l2-mem2mem.c | 20 ++++++++++++++++++++
 include/media/v4l2-mem2mem.h           | 12 ++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 0cc30397fbad..42f51ca25379 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -831,6 +831,17 @@ int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 }
 EXPORT_SYMBOL_GPL(v4l2_m2m_prepare_buf);
 
+int v4l2_m2m_delete_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			struct v4l2_buffer *buf)
+{
+	struct vb2_queue *vq;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
+
+	return vb2_delete_buf(vq, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_delete_buf);
+
 int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 			 struct v4l2_create_buffers *create)
 {
@@ -1377,6 +1388,15 @@ int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv,
 }
 EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs);
 
+int v4l2_m2m_ioctl_delete_buf(struct file *file, void *priv,
+			      struct v4l2_buffer *buf)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_delete_buf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_delete_buf);
+
 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 bb9de6a899e0..96f1b1f3b840 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -381,6 +381,16 @@ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 			 struct v4l2_buffer *buf);
 
+/**
+ * v4l2_m2m_delete_buf() - delete buffer from the queue
+ *
+ * @file: pointer to struct &file
+ * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
+ * @buf: pointer to struct &v4l2_buffer
+ */
+int v4l2_m2m_delete_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			struct v4l2_buffer *buf);
+
 /**
  * v4l2_m2m_create_bufs() - create a source or destination buffer, depending
  * on the type
@@ -846,6 +856,8 @@ 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_delete_buf(struct file *file, void *priv,
+				struct v4l2_buffer *buf);
 int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh,
 				struct v4l2_buffer *buf);
 int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh,
-- 
2.34.1