Add a new source change V4L2_EVENT_SRC_CH_COLORSPACE that
indicates colorspace change in the stream.
The change V4L2_EVENT_SRC_CH_RESOLUTION will always affect
the allocation, but V4L2_EVENT_SRC_CH_COLORSPACE won't.
Signed-off-by: Ming Qian <ming.qian@xxxxxxxxxxx>
---
Documentation/userspace-api/media/v4l/vidioc-dqevent.rst | 9 +++++++++
.../userspace-api/media/videodev2.h.rst.exceptions | 1 +
include/uapi/linux/videodev2.h | 1 +
3 files changed, 11 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
index 8db103760930..91e6b86c976d 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
@@ -369,6 +369,15 @@ call.
loss of signal and so restarting streaming I/O is required in order for
the hardware to synchronize to the video signal.
+ * - ``V4L2_EVENT_SRC_CH_COLORSPACE``
+ - 0x0002
+ - This event gets triggered when a colorsapce change is detected at
+ an input. This can come from a video decoder. Applications will query
+ the new colorspace information (if any, the signal may also have been
+ lost)
+
+ For stateful decoders follow the guidelines in :ref:`decoder`.
+
Return Value
============
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index 35d3456cc812..ac47c6d9448b 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -526,6 +526,7 @@ replace define V4L2_EVENT_CTRL_CH_RANGE ctrl-changes-flags
replace define V4L2_EVENT_CTRL_CH_DIMENSIONS ctrl-changes-flags
replace define V4L2_EVENT_SRC_CH_RESOLUTION src-changes-flags
+replace define V4L2_EVENT_SRC_CH_COLORSPACE src-changes-flags
replace define V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ :c:type:`v4l2_event_motion_det`
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index c8cb2796130f..242242c8e57b 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -2559,6 +2559,7 @@ struct v4l2_event_frame_sync {
};
#define V4L2_EVENT_SRC_CH_RESOLUTION (1 << 0)
+#define V4L2_EVENT_SRC_CH_COLORSPACE (1 << 1)
struct v4l2_event_src_change {
__u32 changes;
--
2.43.0-rc1
