Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755949AbdIGSnE (ORCPT ); Thu, 7 Sep 2017 14:43:04 -0400 Received: from mail-qk0-f194.google.com ([209.85.220.194]:33683 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755921AbdIGSm6 (ORCPT ); Thu, 7 Sep 2017 14:42:58 -0400 X-Google-Smtp-Source: AOwi7QCzyNsdo2Bz1KQvEhpM731i/e5BhFV8L47csHZPqBtd2b2JysQseyITRUXXVcjd8fv7wa9wcg== From: Gustavo Padovan To: linux-media@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Shuah Khan , linux-kernel@vger.kernel.org, Gustavo Padovan Subject: [PATCH v3 07/15] [media] v4l: add V4L2_EVENT_BUF_QUEUED event Date: Thu, 7 Sep 2017 15:42:18 -0300 Message-Id: <20170907184226.27482-8-gustavo@padovan.org> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170907184226.27482-1-gustavo@padovan.org> References: <20170907184226.27482-1-gustavo@padovan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3592 Lines: 106 From: Gustavo Padovan Add a new event the userspace can subscribe to receive notifications when a buffer is queued onto the driver. The event provides the index of the queued buffer. 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 | 11 +++++++++++ 3 files changed, 35 insertions(+) diff --git a/Documentation/media/uapi/v4l/vidioc-dqevent.rst b/Documentation/media/uapi/v4l/vidioc-dqevent.rst index fcd9c933870d..55f9dbdca6ec 100644 --- a/Documentation/media/uapi/v4l/vidioc-dqevent.rst +++ b/Documentation/media/uapi/v4l/vidioc-dqevent.rst @@ -78,6 +78,10 @@ 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_BUF_QUEUED. + * - - __u8 - ``data``\ [64] - Event data. Defined by the event type. The union should be used to @@ -337,6 +341,25 @@ call. each cell in the motion detection grid, then that all cells are automatically assigned to the default region 0. +.. c:type:: v4l2_event_buf_queued + +.. flat-table:: struct v4l2_event_buf_queued + :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..4e014b1d0317 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_BUF_QUEUED 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 e5abab9a908c..e2ec0b66f490 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -2158,6 +2158,7 @@ struct v4l2_streamparm { #define V4L2_EVENT_FRAME_SYNC 4 #define V4L2_EVENT_SOURCE_CHANGE 5 #define V4L2_EVENT_MOTION_DET 6 +#define V4L2_EVENT_BUF_QUEUED 7 #define V4L2_EVENT_PRIVATE_START 0x08000000 /* Payload for V4L2_EVENT_VSYNC */ @@ -2210,6 +2211,15 @@ struct v4l2_event_motion_det { __u32 region_mask; }; +/** + * struct v4l2_event_buf_queued - buffer queued in the driver event + * @index: index of the buffer queued in the driver + */ +struct v4l2_event_buf_queued { + __u32 index; + __s32 out_fence_fd; +}; + struct v4l2_event { __u32 type; union { @@ -2218,6 +2228,7 @@ 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_buf_queued buf_queued; __u8 data[64]; } u; __u32 pending; -- 2.13.5