From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mga01.intel.com ([192.55.52.88]:63881 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758112AbcEFK4l (ORCPT ); Fri, 6 May 2016 06:56:41 -0400 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, hverkuil@xs4all.nl, mchehab@osg.samsung.com, Laurent Pinchart Subject: [RFC 13/22] vb2: Add helper function to check for request buffers Date: Fri, 6 May 2016 13:53:22 +0300 Message-Id: <1462532011-15527-14-git-send-email-sakari.ailus@linux.intel.com> In-Reply-To: <1462532011-15527-1-git-send-email-sakari.ailus@linux.intel.com> References: <1462532011-15527-1-git-send-email-sakari.ailus@linux.intel.com> Sender: linux-media-owner@vger.kernel.org List-ID: From: Laurent Pinchart The vb2_queue_has_request() function will check whether a buffer has been prepared for the given request ID. Signed-off-by: Laurent Pinchart --- drivers/media/v4l2-core/videobuf2-v4l2.c | 17 +++++++++++++++++ include/media/videobuf2-v4l2.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c index bb135fc..6c1c4bf 100644 --- a/drivers/media/v4l2-core/videobuf2-v4l2.c +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c @@ -790,6 +790,23 @@ void vb2_queue_release(struct vb2_queue *q) } EXPORT_SYMBOL_GPL(vb2_queue_release); +bool vb2_queue_has_request(struct vb2_queue *q, unsigned int request) +{ + unsigned int i; + + for (i = 0; i < q->num_buffers; i++) { + struct vb2_buffer *vb = q->bufs[i]; + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + + if (vb->state == VB2_BUF_STATE_PREPARED && + vbuf->request == request) + return true; + } + + return false; +} +EXPORT_SYMBOL_GPL(vb2_queue_has_request); + /** * vb2_poll() - implements poll userspace operation * @q: videobuf2 queue diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h index b1ee91c..7727c52 100644 --- a/include/media/videobuf2-v4l2.h +++ b/include/media/videobuf2-v4l2.h @@ -68,6 +68,8 @@ void vb2_queue_release(struct vb2_queue *q); unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait); +bool vb2_queue_has_request(struct vb2_queue *q, unsigned int request); + /* * The following functions are not part of the vb2 core API, but are simple * helper functions that you can use in your struct v4l2_file_operations, -- 1.9.1