From patchwork Wed Nov 14 13:47:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 52959 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gMvWO-0004je-6a; Wed, 14 Nov 2018 13:47:56 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733129AbeKNXvK (ORCPT + 1 other); Wed, 14 Nov 2018 18:51:10 -0500 Received: from lb1-smtp-cloud8.xs4all.net ([194.109.24.21]:44296 "EHLO lb1-smtp-cloud8.xs4all.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733092AbeKNXvJ (ORCPT ); Wed, 14 Nov 2018 18:51:09 -0500 Received: from cobaltpc1.rd.cisco.com ([IPv6:2001:420:44c1:2579:94da:698d:8319:4499]) by smtp-cloud8.xs4all.net with ESMTPA id MvWBgkBhe9VdZMvWGgNLgP; Wed, 14 Nov 2018 14:47:48 +0100 From: Hans Verkuil To: linux-media@vger.kernel.org Cc: Alexandre Courbot , maxime.ripard@bootlin.com, paul.kocialkowski@bootlin.com, tfiga@chromium.org, Nicolas Dufresne , Hans Verkuil Subject: [PATCHv2 2/9] vb2: add tag support Date: Wed, 14 Nov 2018 14:47:36 +0100 Message-Id: <20181114134743.18993-3-hverkuil@xs4all.nl> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181114134743.18993-1-hverkuil@xs4all.nl> References: <20181114134743.18993-1-hverkuil@xs4all.nl> MIME-Version: 1.0 X-CMAE-Envelope: MS4wfFaaWk1K8DSYacyIiXTpTkz99/eDXJMn2zN1k1+x13CyNPsGQts6hXJxqcgUFv2c6zQanAdl3j6eF8tCD0IrxBMeiyo4brQ72U4FT5xcOHSSjy5AT92W NkZDKEo7fN07XEzKcPGGOnPG/4touu7249Rc544ZRVgbV0dkWw9PG2qmes7ck/Qw1sTduPTd+C1HTxAVD+78Md4osrXtiZGRIDklaz9JgysrhPbQoXUxxuc9 3kbec5JWY53D8OoqHKPvJ31XcxcqBxkCILKtVJ1LknhjjCQgAB41Lo80/xiUP3169dhrp99qBMiSllYk8LfyFFyWUqWIfjsIK+jI9JmkQSUWclN4rTrQmQvn 1GzkteUbvsz4aK7cG+W9pWLU3fZfQKkoF65uz6YqAqQw1f/r5muox+HcJ5mQLzaybQ+YEIbhPKHhD/YPii0yuzUAIS81V+xpRWSvXL2xgSnnJRWSyNU= Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Hans Verkuil Add support for tags to vb2. Besides just storing and setting the tag this patch also adds the vb2_find_tag() function that can be used to find a buffer with the given tag. This function will only look at DEQUEUED and DONE buffers, i.e. buffers that are already processed. Signed-off-by: Hans Verkuil --- .../media/common/videobuf2/videobuf2-v4l2.c | 43 ++++++++++++++++--- include/media/videobuf2-v4l2.h | 21 ++++++++- 2 files changed, 58 insertions(+), 6 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index a17033ab2c22..115f2868223a 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -50,7 +50,8 @@ module_param(debug, int, 0644); V4L2_BUF_FLAG_TIMESTAMP_MASK) /* Output buffer flags that should be passed on to the driver */ #define V4L2_BUFFER_OUT_FLAGS (V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME | \ - V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_TIMECODE) + V4L2_BUF_FLAG_KEYFRAME | \ + V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_TAG) /* * __verify_planes_array() - verify that the planes array passed in struct @@ -144,8 +145,11 @@ static void __copy_timestamp(struct vb2_buffer *vb, const void *pb) */ if (q->copy_timestamp) vb->timestamp = timeval_to_ns(&b->timestamp); - vbuf->flags |= b->flags & V4L2_BUF_FLAG_TIMECODE; - if (b->flags & V4L2_BUF_FLAG_TIMECODE) + vbuf->flags |= b->flags & + (V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_TAG); + if (b->flags & V4L2_BUF_FLAG_TAG) + vbuf->tag = b->tag; + else if (b->flags & V4L2_BUF_FLAG_TIMECODE) vbuf->timecode = b->timecode; } }; @@ -195,6 +199,7 @@ static int vb2_fill_vb2_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b } vbuf->sequence = 0; vbuf->request_fd = -1; + vbuf->tag = 0; if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) { switch (b->memory) { @@ -314,13 +319,19 @@ static int vb2_fill_vb2_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b } if (V4L2_TYPE_IS_OUTPUT(b->type)) { + if ((b->flags & V4L2_BUF_FLAG_TIMECODE) && + (b->flags & V4L2_BUF_FLAG_TAG)) { + dprintk(1, "buffer flag TIMECODE cannot be combined with flag TAG\n"); + return -EINVAL; + } + /* * For output buffers mask out the timecode flag: * this will be handled later in vb2_qbuf(). * The 'field' is valid metadata for this output buffer * and so that needs to be copied here. */ - vbuf->flags &= ~V4L2_BUF_FLAG_TIMECODE; + vbuf->flags &= ~(V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_TAG); vbuf->field = b->field; } else { /* Zero any output buffer flags as this is a capture buffer */ @@ -461,7 +472,10 @@ static void __fill_v4l2_buffer(struct vb2_buffer *vb, void *pb) b->flags = vbuf->flags; b->field = vbuf->field; b->timestamp = ns_to_timeval(vb->timestamp); - b->timecode = vbuf->timecode; + if (b->flags & V4L2_BUF_FLAG_TAG) + b->tag = vbuf->tag; + else if (b->flags & V4L2_BUF_FLAG_TIMECODE) + b->timecode = vbuf->timecode; b->sequence = vbuf->sequence; b->reserved2 = 0; b->request_fd = 0; @@ -587,6 +601,25 @@ static const struct vb2_buf_ops v4l2_buf_ops = { .copy_timestamp = __copy_timestamp, }; +int vb2_find_tag(const struct vb2_queue *q, u32 tag, + unsigned int start_idx) +{ + unsigned int i; + + for (i = start_idx; 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_DEQUEUED || + vb->state == VB2_BUF_STATE_DONE) && + (vbuf->flags & V4L2_BUF_FLAG_TAG) && + vbuf->tag == tag) + return i; + } + return -1; +} +EXPORT_SYMBOL_GPL(vb2_find_tag); + /* * vb2_querybuf() - query video buffer information * @q: videobuf queue diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h index 727855463838..c2a541af6b2c 100644 --- a/include/media/videobuf2-v4l2.h +++ b/include/media/videobuf2-v4l2.h @@ -31,8 +31,9 @@ * @field: field order of the image in the buffer, as defined by * &enum v4l2_field. * @timecode: frame timecode. + * @tag: user specified buffer tag value. * @sequence: sequence count of this frame. - * @request_fd: the request_fd associated with this buffer + * @request_fd: the request_fd associated with this buffer. * @planes: plane information (userptr/fd, length, bytesused, data_offset). * * Should contain enough information to be able to cover all the fields @@ -44,6 +45,7 @@ struct vb2_v4l2_buffer { __u32 flags; __u32 field; struct v4l2_timecode timecode; + __u32 tag; __u32 sequence; __s32 request_fd; struct vb2_plane planes[VB2_MAX_PLANES]; @@ -55,6 +57,23 @@ struct vb2_v4l2_buffer { #define to_vb2_v4l2_buffer(vb) \ container_of(vb, struct vb2_v4l2_buffer, vb2_buf) +/** + * vb2_find_tag() - Find buffer with given tag in the queue + * + * @q: pointer to &struct vb2_queue with videobuf2 queue. + * @tag: the tag to find. Only buffers in state DEQUEUED or DONE + * are considered. + * @start_idx: the start index (usually 0) in the buffer array to start + * searching from. Note that there may be multiple buffers + * with the same tag value, so you can restart the search + * by setting @start_idx to the previously found index + 1. + * + * Returns the buffer index of the buffer with the given @tag, or + * -1 if no buffer with @tag was found. + */ +int vb2_find_tag(const struct vb2_queue *q, u32 tag, + unsigned int start_idx); + int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b); /**