Re: [PATCH v8 37/38] media: ccs: Add IMMUTABLE route flag

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Hi Laurent,

On Thu, Mar 21, 2024 at 06:59:35PM +0200, Laurent Pinchart wrote:
> Hi Sakari,
> 
> Thank you for the patch.
> 
> On Wed, Mar 13, 2024 at 09:25:15AM +0200, Sakari Ailus wrote:
> > Add immutable route flag to the routing table.
> 
> I would write here that the metadata stream route is immutable as CCS
> sensors don't offer a way to disable embedded data. Or if they do, that
> it's currently unimplemented :-) I would then also possibly add a todo
> comment to the code.

They don't. Probably because it's mandatory and there are no important
reasons to disable it.

> 
> > 
> > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>

Thanks!

> 
> > ---
> >  drivers/media/i2c/ccs/ccs-core.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
> > index 838daab212f2..5205d1ecf8f2 100644
> > --- a/drivers/media/i2c/ccs/ccs-core.c
> > +++ b/drivers/media/i2c/ccs/ccs-core.c
> > @@ -3368,12 +3368,14 @@ static int ccs_src_init_state(struct v4l2_subdev *sd,
> >  			.sink_pad = CCS_PAD_SINK,
> >  			.source_pad = CCS_PAD_SRC,
> >  			.source_stream = CCS_STREAM_PIXEL,
> > -			.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> > +			.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE |
> > +				 V4L2_SUBDEV_ROUTE_FL_IMMUTABLE,
> >  		}, {
> >  			.sink_pad = CCS_PAD_META,
> >  			.source_pad = CCS_PAD_SRC,
> >  			.source_stream = CCS_STREAM_META,
> > -			.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> > +			.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE |
> > +				 V4L2_SUBDEV_ROUTE_FL_IMMUTABLE,
> >  		}
> >  	};
> >  	struct v4l2_subdev_krouting routing = {
> 

-- 
Regards,

Sakari Ailus




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