linux-kernel - Re: [PATCH] media: i2c: imx355: Parse and register properties

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Message-ID: <172189883420.392292.18276116110750673176@ping.linuxembedded.co.uk>
Date: Thu, 25 Jul 2024 10:13:54 +0100
From: Kieran Bingham <kieran.bingham@...asonboard.com>
To: Jacopo Mondi <jacopo.mondi@...asonboard.com>, Robert Mader <robert.mader@...labora.com>
Cc: linux-kernel@...r.kernel.org, jacopo@...ndi.org, sakari.ailus@...ux.intel.com, javierm@...hat.com
Subject: Re: [PATCH] media: i2c: imx355: Parse and register properties

Quoting Robert Mader (2024-07-24 21:17:23)
> Hi Jacopo,
> 
> thanks for the quick review!
> 
> Should I send a v2 for that (adding V4L2_CID_CAMERA_ORIENTATION and your 
> RB to the commit message) - and if so should I first wait for more 
> reviews or is that unnecessary/unlike to happen?

Reviews are usually slow, but this found it's way into my inbox because
of a libcamera mention :-D (I do appreciate lore/lei for topic based
subscriptions!)

I don't think theres a specific need to wait for further reviews, but
this might make it easier for you to send a v2 and know it's done ;-)

Reviewed-by: Kieran Bingham <kieran.bingham@...asonboard.com>

> 
> Regards,
> 
> Robert
> 
> On 24.07.24 09:31, Jacopo Mondi wrote:
> > Hi Robert
> >
> > On Tue, Jul 23, 2024 at 08:58:56PM GMT, Robert Mader wrote:
> >> Analogous to e.g. the imx219. This enables propagating
> >> V4L2_CID_CAMERA_SENSOR_ROTATION values so that libcamera
> > and V4L2_CID_CAMERA_ORIENTATION
> >
> >> can detect the correct rotation from the device tree
> >> and propagate it further to e.g. Pipewire.
> > Well, yes, that's a consequence. As long as Linux is concerned, this
> > serves to register the two above mentioned controls.
> >
> >> Signed-off-by: Robert Mader <robert.mader@...labora.com>
> > Reviewed-by: Jacopo Mondi <jacopo.mondi@...asonboard.com>
> >
> > Thanks
> >    j
> >
> >> ---
> >>   drivers/media/i2c/imx355.c | 12 +++++++++++-
> >>   1 file changed, 11 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/media/i2c/imx355.c b/drivers/media/i2c/imx355.c
> >> index 7e9c2f65fa08..0dd25eeea60b 100644
> >> --- a/drivers/media/i2c/imx355.c
> >> +++ b/drivers/media/i2c/imx355.c
> >> @@ -1520,6 +1520,7 @@ static const struct v4l2_subdev_internal_ops imx355_internal_ops = {
> >>   static int imx355_init_controls(struct imx355 *imx355)
> >>   {
> >>      struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
> >> +    struct v4l2_fwnode_device_properties props;
> >>      struct v4l2_ctrl_handler *ctrl_hdlr;
> >>      s64 exposure_max;
> >>      s64 vblank_def;
> >> @@ -1531,7 +1532,7 @@ static int imx355_init_controls(struct imx355 *imx355)
> >>      int ret;
> >>
> >>      ctrl_hdlr = &imx355->ctrl_handler;
> >> -    ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
> >> +    ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12);
> >>      if (ret)
> >>              return ret;
> >>
> >> @@ -1603,6 +1604,15 @@ static int imx355_init_controls(struct imx355 *imx355)
> >>              goto error;
> >>      }
> >>
> >> +    ret = v4l2_fwnode_device_parse(&client->dev, &props);
> >> +    if (ret)
> >> +            goto error;
> >> +
> >> +    ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx355_ctrl_ops,
> >> +                                          &props);
> >> +    if (ret)
> >> +            goto error;
> >> +

In the future (definitely not here) I hope there will be a way for us to
factor out all of this common code from sensor drivers to make things
more consistent.


> >>      imx355->sd.ctrl_handler = ctrl_hdlr;
> >>
> >>      return 0;
> >> --
> >> 2.45.2
> >>
> -- 
> Robert Mader
> Consultant Software Developer
> 
> Collabora Ltd.
> Platinum Building, St John's Innovation Park, Cambridge CB4 0DS, UK
> Registered in England & Wales, no. 5513718
>