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[RFCv2,05/13] v4l2-ctrls: don't initially set CH_VALUE for write-only controls

Message ID cbf40e5e19dd65b2581b53e00103960c6254d9e1.1309260043.git.hans.verkuil@cisco.com (mailing list archive)
State RFC
Headers show

Commit Message

Hans Verkuil June 28, 2011, 11:25 a.m. UTC 
From: Hans Verkuil <hans.verkuil@cisco.com>

When sending the SEND_INITIAL event for write-only controls the
V4L2_EVENT_CTRL_CH_VALUE flag should not be set. It's meaningless.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/video/v4l2-ctrls.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index 63a44fd..1b0422e 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -2032,9 +2032,11 @@  void v4l2_ctrl_add_event(struct v4l2_ctrl *ctrl,
 	if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
 	    (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
 		struct v4l2_event ev;
+		u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
 
-		fill_event(&ev, ctrl, V4L2_EVENT_CTRL_CH_VALUE |
-			V4L2_EVENT_CTRL_CH_FLAGS);
+		if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
+			changes |= V4L2_EVENT_CTRL_CH_VALUE;
+		fill_event(&ev, ctrl, changes);
 		v4l2_event_queue_fh(sev->fh, &ev);
 	}
 	v4l2_ctrl_unlock(ctrl);