Re: [PATCH] media/v4l2-ctrls: Always run s_ctrl on volatile ctrls
From: Ricardo Ribalda Delgado
Date: Tue Feb 17 2015 - 07:21:52 EST
On Tue, Feb 17, 2015 at 1:03 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
> Should be done after the 'ctrl == NULL' check.
Good catch. Fixed on v2
>> if (ctrl == NULL)
> There is one more change that has to be made: setting a volatile control
> should never generate a V4L2_EVENT_CTRL_CH_VALUE event since that makes
> no sense. The way to prevent that is to ensure that ctrl->has_changed is
> always false for volatile controls. The new_to_cur function looks at that
> field to decide whether to send an event.
> The documentation should also be updated: that of V4L2_CTRL_FLAG_VOLATILE
> (in VIDIOC_QUERYCTRL), and of V4L2_EVENT_CTRL_CH_VALUE.
I can do this also if you want. It has been a while without
contributing to media :)
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