From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from moutng.kundenserver.de ([212.227.126.186]:49955 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755569Ab1HEHri (ORCPT ); Fri, 5 Aug 2011 03:47:38 -0400 Date: Fri, 5 Aug 2011 09:47:17 +0200 (CEST) From: Guennadi Liakhovetski To: Linux Media Mailing List cc: Sakari Ailus , Hans Verkuil , Pawel Osciak , Sakari Ailus , Laurent Pinchart , Mauro Carvalho Chehab Subject: [PATCH 2/6 v4] V4L: add a new videobuf2 buffer state VB2_BUF_STATE_PREPARED In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-media-owner@vger.kernel.org List-ID: This patch prepares for a better separation of the buffer preparation stage. Signed-off-by: Guennadi Liakhovetski --- drivers/media/video/videobuf2-core.c | 59 +++++++++++++++++++++------------ include/media/videobuf2-core.h | 2 + 2 files changed, 39 insertions(+), 22 deletions(-) diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c index 3015e60..fb7a3ac 100644 --- a/drivers/media/video/videobuf2-core.c +++ b/drivers/media/video/videobuf2-core.c @@ -333,6 +333,7 @@ static int __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b) b->flags |= V4L2_BUF_FLAG_DONE; break; case VB2_BUF_STATE_DEQUEUED: + case VB2_BUF_STATE_PREPARED: /* nothing */ break; } @@ -817,6 +818,31 @@ static void __enqueue_in_driver(struct vb2_buffer *vb) q->ops->buf_queue(vb); } +static int __buf_prepare(struct vb2_buffer *vb, struct v4l2_buffer *b) +{ + struct vb2_queue *q = vb->vb2_queue; + int ret; + + switch (q->memory) { + case V4L2_MEMORY_MMAP: + ret = __qbuf_mmap(vb, b); + break; + case V4L2_MEMORY_USERPTR: + ret = __qbuf_userptr(vb, b); + break; + default: + WARN(1, "Invalid queue type\n"); + ret = -EINVAL; + } + + if (!ret) + ret = call_qop(q, buf_prepare, vb); + if (ret) + dprintk(1, "qbuf: buffer preparation failed: %d\n", ret); + + return ret; +} + /** * vb2_qbuf() - Queue a buffer from userspace * @q: videobuf2 queue @@ -826,8 +852,8 @@ static void __enqueue_in_driver(struct vb2_buffer *vb) * Should be called from vidioc_qbuf ioctl handler of a driver. * This function: * 1) verifies the passed buffer, - * 2) calls buf_prepare callback in the driver (if provided), in which - * driver-specific buffer initialization can be performed, + * 2) if necessary, calls buf_prepare callback in the driver (if provided), in + * which driver-specific buffer initialization can be performed, * 3) if streaming is on, queues the buffer in driver by the means of buf_queue * callback for processing. * @@ -837,7 +863,7 @@ static void __enqueue_in_driver(struct vb2_buffer *vb) int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b) { struct vb2_buffer *vb; - int ret = 0; + int ret; if (q->fileio) { dprintk(1, "qbuf: file io in progress\n"); @@ -866,29 +892,18 @@ int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b) return -EINVAL; } - if (vb->state != VB2_BUF_STATE_DEQUEUED) { + switch (vb->state) { + case VB2_BUF_STATE_DEQUEUED: + ret = __buf_prepare(vb, b); + if (ret) + return ret; + case VB2_BUF_STATE_PREPARED: + break; + default: dprintk(1, "qbuf: buffer already in use\n"); return -EINVAL; } - if (q->memory == V4L2_MEMORY_MMAP) - ret = __qbuf_mmap(vb, b); - else if (q->memory == V4L2_MEMORY_USERPTR) - ret = __qbuf_userptr(vb, b); - else { - WARN(1, "Invalid queue type\n"); - return -EINVAL; - } - - if (ret) - return ret; - - ret = call_qop(q, buf_prepare, vb); - if (ret) { - dprintk(1, "qbuf: buffer preparation failed\n"); - return ret; - } - /* * Add to the queued buffers list, a buffer will stay on it until * dequeued in dqbuf. diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index f87472a..65946c5 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -106,6 +106,7 @@ enum vb2_fileio_flags { /** * enum vb2_buffer_state - current video buffer state * @VB2_BUF_STATE_DEQUEUED: buffer under userspace control + * @VB2_BUF_STATE_PREPARED: buffer prepared in videobuf and by the driver * @VB2_BUF_STATE_QUEUED: buffer queued in videobuf, but not in driver * @VB2_BUF_STATE_ACTIVE: buffer queued in driver and possibly used * in a hardware operation @@ -117,6 +118,7 @@ enum vb2_fileio_flags { */ enum vb2_buffer_state { VB2_BUF_STATE_DEQUEUED, + VB2_BUF_STATE_PREPARED, VB2_BUF_STATE_QUEUED, VB2_BUF_STATE_ACTIVE, VB2_BUF_STATE_DONE, -- 1.7.2.5