diff options
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 27 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-v4l2.c | 12 | ||||
| -rw-r--r-- | include/media/videobuf2-core.h | 17 |
3 files changed, 31 insertions, 25 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 4faa066b5008..5cd418e57ea5 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -178,6 +178,12 @@ module_param(debug, int, 0644); ret; \ }) +#define call_void_bufop(q, op, args...) \ +({ \ + if (q && q->buf_ops && q->buf_ops->op) \ + q->buf_ops->op(args); \ +}) + static void __vb2_queue_cancel(struct vb2_queue *q); static void __enqueue_in_driver(struct vb2_buffer *vb); @@ -586,13 +592,10 @@ static bool __buffers_in_use(struct vb2_queue *q) * Should be called from vidioc_querybuf ioctl handler in driver. * The passed buffer should have been verified. * This function fills the relevant information for the userspace. - * - * The return values from this function are intended to be directly returned - * from vidioc_querybuf handler in driver. */ -int vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb) +void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb) { - return call_bufop(q, fill_user_buffer, q->bufs[index], pb); + call_void_bufop(q, fill_user_buffer, q->bufs[index], pb); } EXPORT_SYMBOL_GPL(vb2_core_querybuf); @@ -1420,9 +1423,7 @@ int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb) return ret; /* Fill buffer information for the userspace */ - ret = call_bufop(q, fill_user_buffer, vb, pb); - if (ret) - return ret; + call_void_bufop(q, fill_user_buffer, vb, pb); dprintk(1, "prepare of buffer %d succeeded\n", vb->index); @@ -1543,7 +1544,7 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb) q->waiting_for_buffers = false; vb->state = VB2_BUF_STATE_QUEUED; - call_bufop(q, copy_timestamp, vb, pb); + call_void_bufop(q, copy_timestamp, vb, pb); trace_vb2_qbuf(q, vb); @@ -1555,9 +1556,7 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb) __enqueue_in_driver(vb); /* Fill buffer information for the userspace */ - ret = call_bufop(q, fill_user_buffer, vb, pb); - if (ret) - return ret; + call_void_bufop(q, fill_user_buffer, vb, pb); /* * If streamon has been called, and we haven't yet called @@ -1780,9 +1779,7 @@ int vb2_core_dqbuf(struct vb2_queue *q, void *pb, bool nonblocking) call_void_vb_qop(vb, buf_finish, vb); /* Fill buffer information for the userspace */ - ret = call_bufop(q, fill_user_buffer, vb, pb); - if (ret) - return ret; + call_void_bufop(q, fill_user_buffer, vb, pb); /* Remove from videobuf queue */ list_del(&vb->queued_entry); diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c index f17b9cf9255f..c9a28605511a 100644 --- a/drivers/media/v4l2-core/videobuf2-v4l2.c +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c @@ -114,7 +114,7 @@ static int __verify_length(struct vb2_buffer *vb, const struct v4l2_buffer *b) return 0; } -static int __copy_timestamp(struct vb2_buffer *vb, const void *pb) +static void __copy_timestamp(struct vb2_buffer *vb, const void *pb) { const struct v4l2_buffer *b = pb; struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); @@ -131,7 +131,6 @@ static int __copy_timestamp(struct vb2_buffer *vb, const void *pb) if (b->flags & V4L2_BUF_FLAG_TIMECODE) vbuf->timecode = b->timecode; } - return 0; }; static void vb2_warn_zero_bytesused(struct vb2_buffer *vb) @@ -182,7 +181,7 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b, * __fill_v4l2_buffer() - fill in a struct v4l2_buffer with information to be * returned to userspace */ -static int __fill_v4l2_buffer(struct vb2_buffer *vb, void *pb) +static void __fill_v4l2_buffer(struct vb2_buffer *vb, void *pb) { struct v4l2_buffer *b = pb; struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); @@ -281,8 +280,6 @@ static int __fill_v4l2_buffer(struct vb2_buffer *vb, void *pb) b->flags & V4L2_BUF_FLAG_DONE && b->flags & V4L2_BUF_FLAG_LAST) q->last_buffer_dequeued = true; - - return 0; } /** @@ -474,8 +471,9 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b) } vb = q->bufs[b->index]; ret = __verify_planes_array(vb, b); - - return ret ? ret : vb2_core_querybuf(q, b->index, b); + if (!ret) + vb2_core_querybuf(q, b->index, b); + return ret; } EXPORT_SYMBOL(vb2_querybuf); diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index cc94c9d1c2c4..b88dbba37590 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -369,11 +369,22 @@ struct vb2_ops { void (*buf_queue)(struct vb2_buffer *vb); }; +/** + * struct vb2_ops - driver-specific callbacks + * + * @fill_user_buffer: given a vb2_buffer fill in the userspace structure. + * For V4L2 this is a struct v4l2_buffer. + * @fill_vb2_buffer: given a userspace structure, fill in the vb2_buffer. + * If the userspace structure is invalid, then this op + * will return an error. + * @copy_timestamp: copy the timestamp from a userspace structure to + * the vb2_buffer struct. + */ struct vb2_buf_ops { - int (*fill_user_buffer)(struct vb2_buffer *vb, void *pb); + void (*fill_user_buffer)(struct vb2_buffer *vb, void *pb); int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb, struct vb2_plane *planes); - int (*copy_timestamp)(struct vb2_buffer *vb, const void *pb); + void (*copy_timestamp)(struct vb2_buffer *vb, const void *pb); }; /** @@ -512,7 +523,7 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state); void vb2_discard_done(struct vb2_queue *q); int vb2_wait_for_all_buffers(struct vb2_queue *q); -int vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); +void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, unsigned int *count); int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, |
