linux-media.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Sakari Ailus <sakari.ailus@iki.fi>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>,
	dave.stevenson@raspberrypi.com, devicetree@vger.kernel.org,
	kernel-list@raspberrypi.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org, lukasz@jany.st,
	mchehab@kernel.org, naush@raspberrypi.com, robh@kernel.org,
	tomi.valkeinen@ideasonboard.com,
	bcm-kernel-feedback-list@broadcom.com, stefan.wahren@i2se.com
Subject: Re: [PATCH v5 04/11] media: bcm2835-unicam: Add support for CCP2/CSI2 camera interface
Date: Sun, 2 Jul 2023 22:20:29 +0000	[thread overview]
Message-ID: <ZKH4LXKHX8G1WK7a@valkosipuli.retiisi.eu> (raw)
In-Reply-To: <20230702220138.GE9285@pendragon.ideasonboard.com>

Hi Laurent,

On Mon, Jul 03, 2023 at 01:01:38AM +0300, Laurent Pinchart wrote:
> > > > > > > If the hardware doesn't support lane remapping for CCP2, then that should
> > > > > > > be reflected in DT bindings, i.e. data-lanes isn't relevant. There's no
> > > > > > > need to check that here.
> > > > > > 
> > > > > > Should the above check for CSI-2 be dropped as well then ?
> > > > > 
> > > > > Same for CSI-2, too: if there's nothing to configure there (lane remapping)
> > > > > there's no need to validate that part of the DT either.
> > > > 
> > > > OK, I'll drop that.
> > > 
> > > Actually, I'm wondering if it would make sense to tell the parsing
> > > functions whether lane reordering is supported or not. The checks could
> > > then be moved to the framework. What do you think ?
> > 
> > I'm not sure how useful this check would be in the first place: if you have
> > hardware that can reorder the lanes, the framework doesn't know what to
> > check there (if anything) and otherwise there's little point in the
> > entire check.
> 
> Isn't it good to tell users that something is wrong instead of accepting
> the invalid configuration and let them wonder why the device isn't
> working ? Users in this case would be system integrators, not end
> users, but we have lots of debugging information in the kernel aimed for
> them already.

In which of the two cases above the framework could do something useful
there? For devices where you can reorder the lanes or for those where you
can't?

-- 
Sakari Ailus

  reply	other threads:[~2023-07-02 22:20 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-08 15:50 [PATCH v5 00/11] Add support for BCM2835 camera interface (unicam) Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 01/11] media: v4l: Add V4L2-PIX-FMT-Y12P format Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 02/11] media: v4l: Add V4L2-PIX-FMT-Y14P format Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 03/11] dt-bindings: media: Add bindings for bcm2835-unicam Jean-Michel Hautbois
2022-02-09 18:56   ` Rob Herring
2022-02-13 15:48   ` Stefan Wahren
2022-02-14  9:39     ` Maxime Ripard
2022-02-14  9:54       ` Laurent Pinchart
2022-02-14 11:32         ` Stefan Wahren
2022-02-21  7:10           ` Laurent Pinchart
2022-02-21 10:03             ` Maxime Ripard
2022-02-21 12:45             ` Stefan Wahren
2022-02-21 12:52               ` Laurent Pinchart
2022-02-25  8:19   ` Sakari Ailus
2022-02-08 15:50 ` [PATCH v5 04/11] media: bcm2835-unicam: Add support for CCP2/CSI2 camera interface Jean-Michel Hautbois
2022-02-08 21:00   ` Stefan Wahren
2022-02-13 12:52     ` Laurent Pinchart
2022-02-13 11:17   ` Stefan Wahren
2022-02-13 12:49     ` Laurent Pinchart
2022-02-20 10:01   ` Stefan Wahren
2022-02-20 10:08     ` Laurent Pinchart
2022-02-21  9:55   ` Laurent Pinchart
2022-02-25  9:29   ` Sakari Ailus
2023-07-02 15:23     ` Laurent Pinchart
2023-07-02 18:18       ` Sakari Ailus
2023-07-02 21:45         ` Laurent Pinchart
2023-07-02 21:47           ` Laurent Pinchart
2023-07-02 21:56             ` Sakari Ailus
2023-07-02 22:01               ` Laurent Pinchart
2023-07-02 22:20                 ` Sakari Ailus [this message]
2023-07-02 22:28                   ` Laurent Pinchart
2023-07-02 22:33                     ` Sakari Ailus
2023-07-02 21:53           ` Sakari Ailus
2023-07-02 21:58             ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 05/11] media: MAINTAINERS: add bcm2835 unicam driver Jean-Michel Hautbois
2022-02-08 15:58   ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 06/11] ARM: dts: bcm2711: Add unicam CSI nodes Jean-Michel Hautbois
2022-02-13 10:35   ` Stefan Wahren
2022-02-13 13:51     ` Stefan Wahren
2022-02-08 15:50 ` [PATCH v5 07/11] media: imx219: Rename mbus codes array Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 08/11] media: imx219: Switch from open to init_cfg Jean-Michel Hautbois
2022-02-08 16:02   ` Laurent Pinchart
2022-02-08 16:05     ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 09/11] media: imx219: Introduce the set_routing operation Jean-Michel Hautbois
2022-02-21  7:17   ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 10/11] media: imx219: use a local v4l2_subdev to simplify reading Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 11/11] media: imx219: Add support for the V4L2 subdev active state Jean-Michel Hautbois
2022-02-21  7:25   ` Laurent Pinchart
2022-02-16 20:57 ` [PATCH v5 00/11] Add support for BCM2835 camera interface (unicam) Stefan Wahren
2022-02-20 14:30   ` Jean-Michel Hautbois
2022-02-26 17:18     ` Stefan Wahren

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=ZKH4LXKHX8G1WK7a@valkosipuli.retiisi.eu \
    --to=sakari.ailus@iki.fi \
    --cc=bcm-kernel-feedback-list@broadcom.com \
    --cc=dave.stevenson@raspberrypi.com \
    --cc=devicetree@vger.kernel.org \
    --cc=jeanmichel.hautbois@ideasonboard.com \
    --cc=kernel-list@raspberrypi.com \
    --cc=laurent.pinchart@ideasonboard.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=linux-rpi-kernel@lists.infradead.org \
    --cc=lukasz@jany.st \
    --cc=mchehab@kernel.org \
    --cc=naush@raspberrypi.com \
    --cc=robh@kernel.org \
    --cc=stefan.wahren@i2se.com \
    --cc=tomi.valkeinen@ideasonboard.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).