linux-kernel - Re: [PATCHv2 3/3] media: uvcvideo: add UVC 1.5 ROI control

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Date:   Fri, 19 Mar 2021 17:40:14 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Sergey Senozhatsky <senozhatsky@...omium.org>
Cc:     Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv2 3/3] media: uvcvideo: add UVC 1.5 ROI control

Hi Sergey

On Fri, Mar 19, 2021 at 6:35 AM Sergey Senozhatsky
<senozhatsky@...omium.org> wrote:
>
> On (21/03/18 22:19), Ricardo Ribalda wrote:
> > >
> > > May I please ask for more opinions on this?
> >
> > Could you try setting the roi in a loop in your device and verify that
> > it accepts all the values with no modification. If so we can implement
> > the set/get as a quirk for other devices.
>
> Tested on two (very) different devices.

Ahoy, Matey ;)

That is great news. Thanks for testing this.


>
> Firmware D:
>
>    CLAP all passed, we are cool
>
> Firmware H:
>
>    CLAP all passed, we are cool
>
>
> Code sample
>
> ---
>        in_selection.target     = V4L2_SEL_TGT_ROI;
>        in_selection.flags      = V4L2_SEL_FLAG_ROI_AUTO_EXPOSURE;
>
>        for (int i = 0; i < 1001; i++) {
>                in_selection.r.left     = 0 + i;
>                in_selection.r.top      = 0 + i;
>                in_selection.r.width    = 42 + i;
>                in_selection.r.height   = 42 + i;
>
>                ret = doioctl(fd, VIDIOC_S_SELECTION, &in_selection);
>                if (ret) {
>                        fprintf(stderr, "BOOM %d\n", ret);
>                        exit(1);
>                }
>
>                ret = doioctl(fd, VIDIOC_G_SELECTION, &in_selection);
>                if (ret) {
>                        fprintf(stderr, "BANG %d\n", ret);
>                        exit(2);
>                }
>
>                if (in_selection.r.left != i ||
>                    in_selection.r.top != i ||
>                    in_selection.r.width != i + 42 ||
>                    in_selection.r.height != i + 42) {
>
>                        fprintf(stderr, "SNAP %d %d %d %d != %d %d %d %d\n",
>                                i, i, i + 42, i + 42,
>                                in_selection.r.left,
>                                in_selection.r.top,
>                                in_selection.r.width,
>                                in_selection.r.height);
>                        exit(3);
>                }
>        }
>
>        fprintf(stderr, "CLAP all passed, we are cool\n");
> ---



-- 
Ricardo Ribalda