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[media] media: v4l2-mem2mem: extend m2m APIs for more accurate buffer management 

this add functions for:
  - remove buffers from src/dst queue by index
  - remove exact buffer from src/dst queue

also extends m2m API to iterate over a list of src/dst buffers
in safely and non-safely manner.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Stanimir Varbanov 2017-06-15 13:31:42 -03:00 committed by Mauro Carvalho Chehab
parent ff6ccad361
commit d498756451
2 changed files with 129 additions and 0 deletions
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37
drivers/media/v4l2-core/v4l2-mem2mem.c
View File

@ -126,6 +126,43 @@ void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx)
}
EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove);
void v4l2_m2m_buf_remove_by_buf(struct v4l2_m2m_queue_ctx *q_ctx,
struct vb2_v4l2_buffer *vbuf)
{
struct v4l2_m2m_buffer *b;
unsigned long flags;
spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
b = container_of(vbuf, struct v4l2_m2m_buffer, vb);
list_del(&b->list);
q_ctx->num_rdy--;
spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
}
EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove_by_buf);
struct vb2_v4l2_buffer *
v4l2_m2m_buf_remove_by_idx(struct v4l2_m2m_queue_ctx *q_ctx, unsigned int idx)
{
struct v4l2_m2m_buffer *b, *tmp;
struct vb2_v4l2_buffer *ret = NULL;
unsigned long flags;
spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
list_for_each_entry_safe(b, tmp, &q_ctx->rdy_queue, list) {
if (b->vb.vb2_buf.index == idx) {
list_del(&b->list);
q_ctx->num_rdy--;
ret = &b->vb;
break;
}
}
spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove_by_idx);
/*
* Scheduling handlers
*/

92
include/media/v4l2-mem2mem.h
View File

@ -436,6 +436,47 @@ static inline void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx)
return v4l2_m2m_next_buf(&m2m_ctx->cap_q_ctx);
}
/**
* v4l2_m2m_for_each_dst_buf() - iterate over a list of destination ready
* buffers
*
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
* @b: current buffer of type struct v4l2_m2m_buffer
*/
#define v4l2_m2m_for_each_dst_buf(m2m_ctx, b) \
list_for_each_entry(b, &m2m_ctx->cap_q_ctx.rdy_queue, list)
/**
* v4l2_m2m_for_each_src_buf() - iterate over a list of source ready buffers
*
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
* @b: current buffer of type struct v4l2_m2m_buffer
*/
#define v4l2_m2m_for_each_src_buf(m2m_ctx, b) \
list_for_each_entry(b, &m2m_ctx->out_q_ctx.rdy_queue, list)
/**
* v4l2_m2m_for_each_dst_buf_safe() - iterate over a list of destination ready
* buffers safely
*
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
* @b: current buffer of type struct v4l2_m2m_buffer
* @n: used as temporary storage
*/
#define v4l2_m2m_for_each_dst_buf_safe(m2m_ctx, b, n) \
list_for_each_entry_safe(b, n, &m2m_ctx->cap_q_ctx.rdy_queue, list)
/**
* v4l2_m2m_for_each_src_buf_safe() - iterate over a list of source ready
* buffers safely
*
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
* @b: current buffer of type struct v4l2_m2m_buffer
* @n: used as temporary storage
*/
#define v4l2_m2m_for_each_src_buf_safe(m2m_ctx, b, n) \
list_for_each_entry_safe(b, n, &m2m_ctx->out_q_ctx.rdy_queue, list)
/**
* v4l2_m2m_get_src_vq() - return vb2_queue for source buffers
*
@ -488,6 +529,57 @@ static inline void *v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx)
return v4l2_m2m_buf_remove(&m2m_ctx->cap_q_ctx);
}
/**
* v4l2_m2m_buf_remove_by_buf() - take off exact buffer from the list of ready
* buffers
*
* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx
* @vbuf: the buffer to be removed
*/
void v4l2_m2m_buf_remove_by_buf(struct v4l2_m2m_queue_ctx *q_ctx,
struct vb2_v4l2_buffer *vbuf);
/**
* v4l2_m2m_src_buf_remove_by_buf() - take off exact source buffer from the list
* of ready buffers
*
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
* @vbuf: the buffer to be removed
*/
static inline void v4l2_m2m_src_buf_remove_by_buf(struct v4l2_m2m_ctx *m2m_ctx,
struct vb2_v4l2_buffer *vbuf)
{
v4l2_m2m_buf_remove_by_buf(&m2m_ctx->out_q_ctx, vbuf);
}
/**
* v4l2_m2m_dst_buf_remove_by_buf() - take off exact destination buffer from the
* list of ready buffers
*
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
* @vbuf: the buffer to be removed
*/
static inline void v4l2_m2m_dst_buf_remove_by_buf(struct v4l2_m2m_ctx *m2m_ctx,
struct vb2_v4l2_buffer *vbuf)
{
v4l2_m2m_buf_remove_by_buf(&m2m_ctx->cap_q_ctx, vbuf);
}
struct vb2_v4l2_buffer *
v4l2_m2m_buf_remove_by_idx(struct v4l2_m2m_queue_ctx *q_ctx, unsigned int idx);
static inline struct vb2_v4l2_buffer *
v4l2_m2m_src_buf_remove_by_idx(struct v4l2_m2m_ctx *m2m_ctx, unsigned int idx)
{
return v4l2_m2m_buf_remove_by_idx(&m2m_ctx->out_q_ctx, idx);
}
static inline struct vb2_v4l2_buffer *
v4l2_m2m_dst_buf_remove_by_idx(struct v4l2_m2m_ctx *m2m_ctx, unsigned int idx)
{
return v4l2_m2m_buf_remove_by_idx(&m2m_ctx->cap_q_ctx, idx);
}
/* v4l2 ioctl helpers */
int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,