From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
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 <gustavo.padovan@xxxxxxxxxxxxx>
---
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;
--
2.13.6
