From patchwork Fri Oct 20 21:50:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo F. Padovan" X-Patchwork-Id: 45062 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 1e5fBn-0001OH-Fp; Fri, 20 Oct 2017 21:50:47 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753222AbdJTVun (ORCPT + 1 other); Fri, 20 Oct 2017 17:50:43 -0400 Received: from mail-qk0-f195.google.com ([209.85.220.195]:56823 "EHLO mail-qk0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753184AbdJTVul (ORCPT ); Fri, 20 Oct 2017 17:50:41 -0400 Received: by mail-qk0-f195.google.com with SMTP id l194so15989272qke.13; Fri, 20 Oct 2017 14:50:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HUj16BpDbu7jQmvMATwFyTpRqJ7dPltNxA9c84BHhEc=; b=b4uW3Sr0Scl+bsn7JU5SiirhMBi11mCvUosD0svoBSxpUPBBzIOZD+vKDb9ZsTemno 6PFzn7kidhnpwVHyiEp9q4tSL76Txh03KmQq24r/XFS9Yjqk9pLuM6xedpCQ5TQB/p+s fxS8vd2KG41QkegaOJaIj+6fLs3fQNiTOGQVZi4sYLpuZr/kJj/bxutH7GQ6/tMykBzd iLlkYXczJM2Pw70CFR2sSEBczQfGC9C4pewyRH9uq/neq/SD60+TzjmUCpTW86mJeUnM lhydPrGlclkUA8l4tq3w69sU/l8BV6WoJqQWLh8rRKFm/jbFU45LMqFBatE4NOhSLGvz ZPRw== X-Gm-Message-State: AMCzsaUsX//DJxidSDp8vv3L9LBB8rSlBBPuczUBXbVW0ew8dNQ2fR8T AIyvltMPrMspNTkGQvezS4FxDWFZ X-Google-Smtp-Source: ABhQp+RFrfDHOzLE1lcPrIaTZkf4TOCtTdyB09tAvrpXyR0EKx2N/Pmx06xcm1xvg+pSIXz1eZACGQ== X-Received: by 10.55.16.87 with SMTP id a84mr9722938qkh.170.1508536240150; Fri, 20 Oct 2017 14:50:40 -0700 (PDT) Received: from localhost.localdomain (189-19-125-192.dsl.telesp.net.br. [189.19.125.192]) by smtp.gmail.com with ESMTPSA id j4sm1167039qkf.75.2017.10.20.14.50.35 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 20 Oct 2017 14:50:39 -0700 (PDT) From: Gustavo Padovan To: linux-media@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Shuah Khan , Pawel Osciak , Alexandre Courbot , Sakari Ailus , Brian Starkey , linux-kernel@vger.kernel.org, Gustavo Padovan Subject: [RFC v4 05/17] [media] v4l: add V4L2_EVENT_OUT_FENCE event Date: Fri, 20 Oct 2017 19:50:00 -0200 Message-Id: <20171020215012.20646-6-gustavo@padovan.org> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20171020215012.20646-1-gustavo@padovan.org> References: <20171020215012.20646-1-gustavo@padovan.org> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Gustavo Padovan Add a new event the userspace can subscribe to receive notifications of the out_fence_fd when a buffer is queued onto the driver. The event provides the index of the queued buffer and the out_fence_fd. v3: - Rename event to V4L2_EVENT_OUT_FENCE v2: - Add missing Documentation (Mauro) Signed-off-by: Gustavo Padovan --- Documentation/media/uapi/v4l/vidioc-dqevent.rst | 23 +++++++++++++++++++++++ Documentation/media/videodev2.h.rst.exceptions | 1 + include/uapi/linux/videodev2.h | 12 ++++++++++++ 3 files changed, 36 insertions(+) diff --git a/Documentation/media/uapi/v4l/vidioc-dqevent.rst b/Documentation/media/uapi/v4l/vidioc-dqevent.rst index cb3565f36793..2143df63aeb1 100644 --- a/Documentation/media/uapi/v4l/vidioc-dqevent.rst +++ b/Documentation/media/uapi/v4l/vidioc-dqevent.rst @@ -79,6 +79,10 @@ call. - ``src_change`` - Event data for event V4L2_EVENT_SOURCE_CHANGE. * - + - struct :c:type:`v4l2_event_buf_queued` + - ``buf_queued`` + - Event data for event V4L2_EVENT_OUT_FENCE. + * - - __u8 - ``data``\ [64] - Event data. Defined by the event type. The union should be used to @@ -338,6 +342,25 @@ call. each cell in the motion detection grid, then that all cells are automatically assigned to the default region 0. +.. c:type:: v4l2_event_out_fence + +.. flat-table:: struct v4l2_event_out_fence + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u32 + - ``index`` + - The index of the buffer that was queued to the driver. + * - __s32 + - ``out_fence_fd`` + - The out-fence file descriptor of the buffer that was queued to + the driver. It will signal when the buffer is ready, or if an + error happens. + + + +.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| .. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions index a5cb0a8686ac..32f3d5b37e3a 100644 --- a/Documentation/media/videodev2.h.rst.exceptions +++ b/Documentation/media/videodev2.h.rst.exceptions @@ -462,6 +462,7 @@ replace define V4L2_EVENT_CTRL event-type replace define V4L2_EVENT_FRAME_SYNC event-type replace define V4L2_EVENT_SOURCE_CHANGE event-type replace define V4L2_EVENT_MOTION_DET event-type +replace define V4L2_EVENT_OUT_FENCE event-type replace define V4L2_EVENT_PRIVATE_START event-type replace define V4L2_EVENT_CTRL_CH_VALUE ctrl-changes-flags diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 185d6a0acc06..2a432e8c18e3 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -2156,6 +2156,7 @@ struct v4l2_streamparm { #define V4L2_EVENT_FRAME_SYNC 4 #define V4L2_EVENT_SOURCE_CHANGE 5 #define V4L2_EVENT_MOTION_DET 6 +#define V4L2_EVENT_OUT_FENCE 7 #define V4L2_EVENT_PRIVATE_START 0x08000000 /* Payload for V4L2_EVENT_VSYNC */ @@ -2208,6 +2209,16 @@ struct v4l2_event_motion_det { __u32 region_mask; }; +/** + * struct v4l2_event_out_fence - out fence fd event + * @index: index of the buffer queued in the driver + * @out_fence_fd: out-fence fd of the buffer queued + */ +struct v4l2_event_out_fence { + __u32 index; + __s32 out_fence_fd; +}; + struct v4l2_event { __u32 type; union { @@ -2216,6 +2227,7 @@ struct v4l2_event { struct v4l2_event_frame_sync frame_sync; struct v4l2_event_src_change src_change; struct v4l2_event_motion_det motion_det; + struct v4l2_event_out_fence out_fence; __u8 data[64]; } u; __u32 pending;