linux-kernel - Re: [PATCH 2/3] media: uvcvideo: UVC minimum relative pan/tilt/zoom speed fix

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Message-ID: <CANiDSCvfFuQSa5j7Zs-skXmPGTHRtGVH3moA8w=AG1BF1m=dLw@mail.gmail.com>
Date: Wed, 3 Apr 2024 22:45:42 +0200
From: Ricardo Ribalda <ribalda@...omium.org>
To: johnebgood@...uritylive.com
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
	Mauro Carvalho Chehab <mchehab@...nel.org>, linux-media@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linh.tp.vu@...il.com, soyer@....hu
Subject: Re: [PATCH 2/3] media: uvcvideo: UVC minimum relative pan/tilt/zoom
 speed fix

Hi John

Can you squash all the patches in one and resend as v3?

When you send a new version of your patch, you want to send it as PATCHvX

b4 should do this automatically for you:

- just go to the original branch
git checkout b4/uvc-relative-ptz-speed-fix

- then edit the change with something like
git rebase -i

- then edit the cover to describe the changelog with
b4 prep --edit-cover

-then submit
b4 submit

I will comment on your 2/2... but it should be squashed into your 1/2

Thanks!


On Wed, 3 Apr 2024 at 21:58, John Bauer via B4 Relay
<devnull+johnebgood.securitylive.com@...nel.org> wrote:
>
> From: John Bauer <johnebgood@...uritylive.com>
>
> Made recommended changes from Ricardo. I explored the case where
> the minimum could be > 0 but less than the maximum. If this were
> to occur the range of -maximum to maximum would still apply correctly
> however there would be a range from -min to min that would possibly
> not apply. It would be possible to capture the probed minimum and
> check against that when setting the controls.
>
> Signed-off-by: John Bauer <johnebgood@...uritylive.com>
> ---
>  drivers/media/usb/uvc/uvc_ctrl.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index b389ab3ee05d..04300a782c81 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1322,6 +1322,10 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
>                 break;
>         }
>
> +       if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)
> +               v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX,
> +                                    uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
> +
>         if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) {
>                 switch (v4l2_ctrl->id) {
>                 case V4L2_CID_ZOOM_CONTINUOUS:
> @@ -1332,8 +1336,7 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
>                          * value cannot be probed so it becomes the additive
>                          * inverse of maximum.
>                          */
> -                       v4l2_ctrl->minimum = -1 * mapping->get(mapping, UVC_GET_MAX,
> -                                               uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
> +                       v4l2_ctrl->minimum = -v4l2_ctrl->maximum;
>                         break;
>                 default:
>                         v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN,
> @@ -1342,10 +1345,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
>                 }
>         }
>
> -       if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)
> -               v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX,
> -                                    uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
> -
>         if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)
>                 v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES,
>                                   uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
> @@ -1940,7 +1939,7 @@ int uvc_ctrl_set(struct uvc_fh *handle,
>                 case V4L2_CID_ZOOM_CONTINUOUS:
>                 case V4L2_CID_PAN_SPEED:
>                 case V4L2_CID_TILT_SPEED:
> -                       min = max * -1;
> +                       min = -max;
>                 default:
>                         break;
>                 }
>
> --
> 2.34.1
>
>


--
Ricardo Ribalda