Add a new V4L2_EVENT_CTRL_CH_DIMENSIONS change flag that is issued
when the dimensions of an array change as a result of a
__v4l2_ctrl_modify_dimensions() call.
This will inform userspace that there are new dimensions.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
---
Documentation/userspace-api/media/v4l/vidioc-dqevent.rst | 5 +++++
Documentation/userspace-api/media/videodev2.h.rst.exceptions | 1 +
drivers/media/v4l2-core/v4l2-ctrls-api.c | 3 ++-
include/uapi/linux/videodev2.h | 1 +
4 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
index 6eb40073c906..8db103760930 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
@@ -332,6 +332,11 @@ call.
- 0x0004
- This control event was triggered because the minimum, maximum,
step or the default value of the control changed.
+ * - ``V4L2_EVENT_CTRL_CH_DIMENSIONS``
+ - 0x0008
+ - This control event was triggered because the dimensions of the
+ control changed. Note that the number of dimensions remains the
+ same.
.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.5cm}|
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index 0b91200776f8..274474425b05 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -506,6 +506,7 @@ replace define V4L2_EVENT_PRIVATE_START event-type
replace define V4L2_EVENT_CTRL_CH_VALUE ctrl-changes-flags
replace define V4L2_EVENT_CTRL_CH_FLAGS ctrl-changes-flags
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
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-api.c b/drivers/media/v4l2-core/v4l2-ctrls-api.c
index 878da8592106..67fbdccda2d8 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-api.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-api.c
@@ -1020,7 +1020,8 @@ int __v4l2_ctrl_modify_dimensions(struct v4l2_ctrl *ctrl,
for (i = 0; i < elems; i++)
ctrl->type_ops->init(ctrl, i, ctrl->p_cur);
cur_to_new(ctrl);
- send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_VALUE);
+ send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_VALUE |
+ V4L2_EVENT_CTRL_CH_DIMENSIONS);
return 0;
}
EXPORT_SYMBOL(__v4l2_ctrl_modify_dimensions);
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 9018aa984db3..3971af623c56 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -2398,6 +2398,7 @@ struct v4l2_event_vsync {
#define V4L2_EVENT_CTRL_CH_VALUE (1 << 0)
#define V4L2_EVENT_CTRL_CH_FLAGS (1 << 1)
#define V4L2_EVENT_CTRL_CH_RANGE (1 << 2)
+#define V4L2_EVENT_CTRL_CH_DIMENSIONS (1 << 3)
struct v4l2_event_ctrl {
__u32 changes;
--
2.35.1
