linux-kernel - Re: [PATCHv3 3/6] media: v4l UAPI: add ROI auto-controls flags

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Date:   Tue, 23 Mar 2021 17:04:55 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Sergey Senozhatsky <senozhatsky@...omium.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv3 3/6] media: v4l UAPI: add ROI auto-controls flags

Hi Sergey

On Fri, Mar 19, 2021 at 6:53 AM Sergey Senozhatsky
<senozhatsky@...omium.org> wrote:
>
> UVC 1.5 defines the following Region Of Interest auto controls:
>
> D0: Auto Exposure
> D1: Auto Iris
> D2: Auto White Balance
> D3: Auto Focus
> D4: Auto Face Detect
> D5: Auto Detect and Track
> D6: Image Stabilization
> D7: Higher Quality
> D8 – D15: Reserved, set to zero
>
> Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
> ---
>  include/uapi/linux/v4l2-common.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/include/uapi/linux/v4l2-common.h b/include/uapi/linux/v4l2-common.h
> index 3651ebb8cb23..34f1c262d6aa 100644
> --- a/include/uapi/linux/v4l2-common.h
> +++ b/include/uapi/linux/v4l2-common.h
> @@ -92,6 +92,16 @@
>  #define V4L2_SEL_FLAG_LE               (1 << 1)
>  #define V4L2_SEL_FLAG_KEEP_CONFIG      (1 << 2)
>

Are you sure that you do not want to start with 1<<3, there might be
some hardware that support LE/SE
> +/* ROI auto-controls flags */
> +#define V4L2_SEL_FLAG_ROI_AUTO_EXPOSURE                (1 << 0)
> +#define V4L2_SEL_FLAG_ROI_AUTO_IRIS                    (1 << 1)
> +#define V4L2_SEL_FLAG_ROI_AUTO_WHITE_BALANCE           (1 << 2)
> +#define V4L2_SEL_FLAG_ROI_AUTO_FOCUS                   (1 << 3)
> +#define V4L2_SEL_FLAG_ROI_AUTO_FACE_DETECT             (1 << 4)
> +#define V4L2_SEL_FLAG_ROI_AUTO_DETECT_AND_TRACK        (1 << 5)
> +#define V4L2_SEL_FLAG_ROI_AUTO_IMAGE_STABILIXATION     (1 << 6)
> +#define V4L2_SEL_FLAG_ROI_AUTO_HIGHER_QUALITY          (1 << 7)
> +
>  struct v4l2_edid {
>         __u32 pad;
>         __u32 start_block;
> --
> 2.31.0.rc2.261.g7f71774620-goog
>


-- 
Ricardo Ribalda