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[media] v4l2-mem2mem: add support for prepare_buf 

This was never added for some reason, so add it now.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2015-06-05 11:28:50 -03:00 committed by Mauro Carvalho Chehab
parent f00245c2e8
commit e68cf471e7
2 changed files with 32 additions and 0 deletions
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28
drivers/media/v4l2-core/v4l2-mem2mem.c
View File

@ -426,6 +426,25 @@ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
}
EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf);
/**
* v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on
* the type
*/
int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_buffer *buf)
{
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
ret = vb2_prepare_buf(vq, buf);
if (!ret)
v4l2_m2m_try_schedule(m2m_ctx);
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_m2m_prepare_buf);
/**
* v4l2_m2m_create_bufs() - create a source or destination buffer, depending
* on the type
@ -811,6 +830,15 @@ int v4l2_m2m_ioctl_dqbuf(struct file *file, void *priv,
}
EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_dqbuf);
int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct v4l2_fh *fh = file->private_data;
return v4l2_m2m_prepare_buf(file, fh->m2m_ctx, buf);
}
EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_prepare_buf);
int v4l2_m2m_ioctl_expbuf(struct file *file, void *priv,
struct v4l2_exportbuffer *eb)
{

4
include/media/v4l2-mem2mem.h
View File

@ -116,6 +116,8 @@ int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_buffer *buf);
int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_buffer *buf);
int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_buffer *buf);
int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_create_buffers *create);
@ -248,6 +250,8 @@ int v4l2_m2m_ioctl_qbuf(struct file *file, void *fh,
struct v4l2_buffer *buf);
int v4l2_m2m_ioctl_dqbuf(struct file *file, void *fh,
struct v4l2_buffer *buf);
int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *fh,
struct v4l2_buffer *buf);
int v4l2_m2m_ioctl_streamon(struct file *file, void *fh,
enum v4l2_buf_type type);
int v4l2_m2m_ioctl_streamoff(struct file *file, void *fh,