Re: [PATCH v2] media: v4l2-subdev: Refactor events
From: Sakari Ailus
Date: Mon Oct 21 2024 - 03:27:09 EST
Hi Laurent, Tommaso,
On Sun, Oct 20, 2024 at 07:43:54PM +0300, Laurent Pinchart wrote:
> Hi Tommaso,
>
> Thank you for the patch.
>
> On Sun, Oct 20, 2024 at 06:35:32PM +0200, Tommaso Merciai wrote:
> > Controls can be exposed to userspace via a v4l-subdevX device, and
> > userspace has to be able to subscribe to control events so that it is
> > notified when the control changes value.
> > If a control handler is set for the subdev then set the HAS_EVENTS
> > flag automatically into v4l2_subdev_init_finalize() and use
> > v4l2_ctrl_subdev_subscribe_event() and v4l2_event_subdev_unsubscribe()
> > as default if subdev don't have .(un)subscribe control operations.
>
> I would add here
>
> This simplifies subdev drivers by avoiding the need to set the
> V4L2_SUBDEV_FL_HAS_EVENTS flag and plug the event handlers, and ensures
> consistency of the API exposed to userspace.
>
> And you can also add
>
> Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>
> > Signed-off-by: Tommaso Merciai <tomm.merciai@xxxxxxxxx>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Thanks!
I've picked this to my tree.
Please try to properly wrap the commit message the next time, most editors
can do that automatically.
--
Sakari Ailus