linux-kernel - Re: [PATCH v10 6/8] Documentation: media: Describe V4L2_CID_UNIT_CELL

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Message-ID: <5934d1ce-fb9e-1965-cff2-1c3cc70006df@xs4all.nl>
Date:   Mon, 7 Oct 2019 14:06:20 +0200
From:   Hans Verkuil <hverkuil-cisco@...all.nl>
To:     Ricardo Ribalda Delgado <ribalda@...nel.org>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        Jacopo Mondi <jacopo@...ndi.org>,
        linux-media <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v10 6/8] Documentation: media: Describe
 V4L2_CID_UNIT_CELL_SIZE

On 10/7/19 2:03 PM, Ricardo Ribalda Delgado wrote:
> Hi Hans
> 
> 
> 
> On Mon, Oct 7, 2019 at 2:01 PM Hans Verkuil <hverkuil-cisco@...all.nl> wrote:
>>
>> On 10/7/19 1:35 PM, Ricardo Ribalda Delgado wrote:
>>> New control to pass to userspace the width/height of a pixel. Which is
>>> needed for calibration and lens selection.
>>>
>>> Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
>>> Signed-off-by: Ricardo Ribalda Delgado <ribalda@...nel.org>
>>> ---
>>>  Documentation/media/uapi/v4l/ext-ctrls-image-source.rst | 9 +++++++++
>>>  1 file changed, 9 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..6388668855d0 100644
>>> --- a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
>>> +++ b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
>>> @@ -55,3 +55,12 @@ 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 nanometers. The struct
>>> +    :c:type:`v4l2_area` provides the width and the height in separate
>>> +    fields to take into consideration asymmetric pixels and/or hardware
>>> +    binning.
>>
>> This still states that this control takes binning into account. I understood that
>> we decided not to do that?
>>
> 
> Good catch, seems that at some point I changed my mind :).
> 
> Will fix this doc.
> 
> Can I resend only this patch to avoid spamming the list?

Yes, that's fine.

	Hans

> 
> 
>> Regards,
>>
>>         Hans
>>
>>> +    The unit cell consists of the whole area of the pixel, sensitive and
>>> +    non-sensitive.
>>> +    This control is required for automatic calibration of sensors/cameras.
>>>
>>