From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: "Niklas Söderlund" <niklas.soderlund@ragnatech.se>
Cc: Sakari Ailus <sakari.ailus@iki.fi>,
Hans Verkuil <hverkuil@xs4all.nl>,
linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
tomoharu.fukawa.eb@renesas.com,
Kieran Bingham <kieran.bingham@ideasonboard.com>
Subject: Re: [PATCH v9 07/28] rcar-vin: change name of video device
Date: Mon, 08 Jan 2018 18:35:23 +0200 [thread overview]
Message-ID: <5666028.A5BLSl6sJg@avalon> (raw)
In-Reply-To: <20171220152055.GB32148@bigcity.dyn.berto.se>
Hi Niklas,
On Wednesday, 20 December 2017 17:20:55 EET Niklas Söderlund wrote:
> On 2017-12-14 17:50:24 +0200, Laurent Pinchart wrote:
> > On Thursday, 14 December 2017 16:25:00 EET Sakari Ailus wrote:
> >> On Fri, Dec 08, 2017 at 10:17:36AM +0200, Laurent Pinchart wrote:
> >>> On Friday, 8 December 2017 03:08:21 EET Niklas Söderlund wrote:
> >>>> The rcar-vin driver needs to be part of a media controller to
> >>>> support Gen3. Give each VIN instance a unique name so it can be
> >>>> referenced from userspace.
> >>>>
> >>>> Signed-off-by: Niklas Söderlund
> >>>> <niklas.soderlund+renesas@ragnatech.se>
> >>>> Reviewed-by: Kieran Bingham
> >>>> <kieran.bingham+renesas@ideasonboard.com>
> >>>> Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
> >>>> ---
> >>>>
> >>>> drivers/media/platform/rcar-vin/rcar-v4l2.c | 3 ++-
> >>>> 1 file changed, 2 insertions(+), 1 deletion(-)
> >>>>
> >>>> diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c
> >>>> b/drivers/media/platform/rcar-vin/rcar-v4l2.c index
> >>>> 59ec6d3d119590aa..19de99133f048960 100644
> >>>> --- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
> >>>> +++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> >>>> @@ -876,7 +876,8 @@ int rvin_v4l2_register(struct rvin_dev *vin)
> >>>> vdev->fops = &rvin_fops;
> >>>> vdev->v4l2_dev = &vin->v4l2_dev;
> >>>> vdev->queue = &vin->queue;
> >>>> - strlcpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
> >>>> + snprintf(vdev->name, sizeof(vdev->name), "%s %s", KBUILD_MODNAME,
> >>>> + dev_name(vin->dev));
> >>>
> >>> Do we need the module name here ? How about calling them "%s output",
> >>> dev_name(vin->dev) to emphasize the fact that this is a video node and
> >>> not a VIN subdev ? This is what the omap3isp and vsp1 drivers do.
> >>>
> >>> We're suffering a bit from the fact that V4L2 has never standardized a
> >>> naming scheme for the devices. It wouldn't be fair to ask you to fix
> >>> that as a prerequisite to get the VIN driver merged, but we clearly have
> >>> to work on that at some point.
> >>
> >> Agreed, this needs to be stable and I think aligning to what omap3isp or
> >> vsp1 do would be a good fix here.
> >
> > Even omap3isp and vsp1 are not fully aligned, so I think we need to design
> > a naming policy and document it.
>
> I agree that align this is a good idea. And for this reason I chosen to
> update this patch as such:
>
> "%s output", dev_name(vin->dev)
Wouldn't it be easier for userspace to use
"VIN%u output", index
where index is the VIN index as specified in DT ?
> I hope this is a step in the correct direction. If not please let me
> know as soon as possible so I can minimize the trouble for the other
> developers doing stuff on-top of this series and there test scripts :-)
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2018-01-08 16:34 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-08 1:08 [PATCH v9 00/28] rcar-vin: Add Gen3 with media controller Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 01/28] rcar-vin: add Gen3 devicetree bindings documentation Niklas Söderlund
2017-12-08 7:46 ` Laurent Pinchart
2017-12-08 12:55 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 02/28] rcar-vin: rename poorly named initialize and cleanup functions Niklas Söderlund
2017-12-08 7:49 ` Laurent Pinchart
2017-12-08 12:58 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 03/28] rcar-vin: unregister video device on driver removal Niklas Söderlund
2017-12-08 7:54 ` Laurent Pinchart
2017-12-08 8:46 ` Hans Verkuil
2017-12-08 8:49 ` Laurent Pinchart
2017-12-08 13:09 ` Niklas Söderlund
2017-12-08 19:07 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 04/28] rcar-vin: move subdevice handling to async callbacks Niklas Söderlund
2017-12-08 8:03 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 05/28] rcar-vin: move chip information to own struct Niklas Söderlund
2017-12-08 8:08 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 06/28] rcar-vin: move max width and height information to chip information Niklas Söderlund
2017-12-08 8:10 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 07/28] rcar-vin: change name of video device Niklas Söderlund
2017-12-08 8:17 ` Laurent Pinchart
2017-12-14 14:25 ` Sakari Ailus
2017-12-14 15:50 ` Laurent Pinchart
2017-12-20 15:20 ` Niklas Söderlund
2018-01-08 16:35 ` Laurent Pinchart [this message]
2018-01-08 16:42 ` Niklas Söderlund
2018-01-08 17:48 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 08/28] rcar-vin: move functions regarding scaling Niklas Söderlund
2017-12-08 8:28 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 09/28] rcar-vin: all Gen2 boards can scale simplify logic Niklas Söderlund
2017-12-08 8:33 ` Laurent Pinchart
2017-12-20 16:17 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 10/28] rcar-vin: do not reset crop and compose when setting format Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 11/28] rcar-vin: do not allow changing scaling and composing while streaming Niklas Söderlund
2017-12-08 9:04 ` Laurent Pinchart
2017-12-08 14:14 ` Niklas Söderlund
2017-12-08 19:20 ` Laurent Pinchart
2017-12-20 16:26 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 12/28] rcar-vin: read subdevice format for crop only when needed Niklas Söderlund
2017-12-08 9:11 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 13/28] rcar-vin: fix handling of single field frames (top, bottom and alternate fields) Niklas Söderlund
2017-12-08 9:35 ` Laurent Pinchart
2017-12-08 14:06 ` Niklas Söderlund
2017-12-08 19:30 ` Laurent Pinchart
2017-12-20 17:17 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 14/28] rcar-vin: move media bus configuration to struct rvin_info Niklas Söderlund
2017-12-08 9:40 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 15/28] rcar-vin: enable Gen3 hardware configuration Niklas Söderlund
2017-12-08 9:47 ` Laurent Pinchart
2017-12-20 21:09 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 16/28] rcar-vin: add function to manipulate Gen3 chsel value Niklas Söderlund
2017-12-08 9:52 ` Laurent Pinchart
2017-12-20 21:20 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 17/28] rcar-vin: add flag to switch to media controller mode Niklas Söderlund
2017-12-08 9:52 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 18/28] rcar-vin: break out format alignment and checking Niklas Söderlund
2017-12-08 10:01 ` Laurent Pinchart
2017-12-21 0:25 ` Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 19/28] rcar-vin: use different v4l2 operations in media controller mode Niklas Söderlund
2017-12-08 10:14 ` Laurent Pinchart
2017-12-08 10:24 ` Hans Verkuil
2017-12-08 19:31 ` Laurent Pinchart
2018-01-19 0:46 ` Niklas Söderlund
2018-03-02 11:33 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 20/28] rcar-vin: prepare for media controller mode initialization Niklas Söderlund
2017-12-08 10:20 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 21/28] rcar-vin: add group allocator functions Niklas Söderlund
2017-12-08 20:12 ` Laurent Pinchart
2018-01-08 17:24 ` Niklas Söderlund
2018-01-08 17:57 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 22/28] rcar-vin: add chsel information to rvin_info Niklas Söderlund
2017-12-08 20:37 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 23/28] rcar-vin: parse Gen3 OF and setup media graph Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 24/28] rcar-vin: add link notify for Gen3 Niklas Söderlund
2017-12-08 1:08 ` [PATCH v9 25/28] rcar-vin: extend {start,stop}_streaming to work with media controller Niklas Söderlund
2017-12-08 20:45 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 26/28] rcar-vin: enable support for r8a7795 Niklas Söderlund
2017-12-08 10:21 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 27/28] rcar-vin: enable support for r8a7796 Niklas Söderlund
2017-12-08 10:25 ` Laurent Pinchart
2017-12-08 1:08 ` [PATCH v9 28/28] rcar-vin: enable support for r8a77970 Niklas Söderlund
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