linux-kernel - Re: [PATCH v3 2/7] Documentation: media: Describe V4L2_CID_UNIT_CELL

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Message-ID: <1566565015.3023.16.camel@pengutronix.de>
Date:   Fri, 23 Aug 2019 14:56:55 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Ricardo Ribalda Delgado <ribalda@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jacopo Mondi <jacopo@...ndi.org>
Subject: Re: [PATCH v3 2/7] Documentation: media: Describe
 V4L2_CID_UNIT_CELL_SIZE

On Fri, 2019-08-23 at 14:37 +0200, Ricardo Ribalda Delgado wrote:
> New control to pass to userspace the width/height of a pixel. Which is
> needed for calibration and lens selection.
> 
> Signed-off-by: Ricardo Ribalda Delgado <ribalda@...nel.org>
> ---
>  Documentation/media/uapi/v4l/ext-ctrls-image-source.rst | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
> index 2c3ab5796d76..6e728accf67b 100644
> --- a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
> +++ b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
> @@ -55,3 +55,11 @@ Image Source Control IDs
>  
>  ``V4L2_CID_TEST_PATTERN_GREENB (integer)``
>      Test pattern green (next to blue) colour component.
> +
> +``V4L2_CID_UNIT_CELL_SIZE (struct)``
> +    This control returns the unit cell size in nanometres. The struct provides
> +    the width and the height in separated fields to take into consideration
> +    asymmetric pixels and/or hardware binning.
> +    The unit cell consists of the whole area of the pixel, sensitive and
> +    non-sensitive.
> +    This control is required for automatic calibration sensors/cameras.

Can we have a link from here to the struct v4l2_area documentation?

regards
Philipp