linux-kernel - Re: [PATCH v9 1/4] media: videodev2.h, v4l2-ioctl: add rkisp1 meta buffer format

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Date:   Wed, 6 Nov 2019 20:26:11 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     Ezequiel Garcia <ezequiel@...labora.com>,
        "Hans Verkuil (hansverk)" <hansverk@...co.com>,
        "linux-rockchip@...ts.infradead.org" 
        <linux-rockchip@...ts.infradead.org>
Cc:     "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "eddie.cai.linux@...il.com" <eddie.cai.linux@...il.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "heiko@...ech.de" <heiko@...ech.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "jeffy.chen@...k-chips.com" <jeffy.chen@...k-chips.com>,
        "zyc@...k-chips.com" <zyc@...k-chips.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tfiga@...omium.org" <tfiga@...omium.org>,
        "hans.verkuil@...co.com" <hans.verkuil@...co.com>,
        "laurent.pinchart@...asonboard.com" 
        <laurent.pinchart@...asonboard.com>,
        "sakari.ailus@...ux.intel.com" <sakari.ailus@...ux.intel.com>,
        "kernel@...labora.com" <kernel@...labora.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "zhengsq@...k-chips.com" <zhengsq@...k-chips.com>,
        Jacob Chen <jacob2.chen@...k-chips.com>
Subject: Re: [PATCH v9 1/4] media: videodev2.h, v4l2-ioctl: add rkisp1 meta
 buffer format



On 11/6/19 11:44 AM, Ezequiel Garcia wrote:
> Hi Hans, Helen:
> 
> On Wed, 2019-11-06 at 09:30 -0300, Helen Koike wrote:
>>
>> On 11/6/19 10:22 AM, Hans Verkuil (hansverk) wrote:
>>> On 11/6/19 1:01 PM, Helen Koike wrote:
>>>> From: Shunqian Zheng <zhengsq@...k-chips.com>
>>>>
>>>> Add the Rockchip ISP1 specific processing parameter format
>>>> V4L2_META_FMT_RK_ISP1_PARAMS and metadata format
>>>> V4L2_META_FMT_RK_ISP1_STAT_3A for 3A.
>>>>
>>>> Signed-off-by: Shunqian Zheng <zhengsq@...k-chips.com>
>>>> Signed-off-by: Jacob Chen <jacob2.chen@...k-chips.com>
>>>> Acked-by: Hans Verkuil <hans.verkuil@...co.com>
>>>
>>> I acked this? It is missing documentation for these new formats.
>>
>> I think so https://www.spinics.net/lists/linux-rockchip/msg18999.html :)
>>
>> I'll update the docs and the fixes you pointed below.
>>
>> Thanks.
>> Helen
>>
>>>> [refactored for upstream]
>>>> Signed-off-by: Helen Koike <helen.koike@...labora.com>
>>>> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>>>>
>>>> ---
>>>>
>>>> Changes in v9:
>>>> - Add reviewed-by tag from Laurent
>>>>
>>>> Changes in v8: None
>>>> Changes in v7:
>>>> - s/IPU3/RK_ISP1
>>>>
>>>>  drivers/media/v4l2-core/v4l2-ioctl.c | 2 ++
>>>>  include/uapi/linux/videodev2.h       | 4 ++++
>>>>  2 files changed, 6 insertions(+)
>>>>
>>>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
>>>> index 315ac12c3e0a..ade990554caf 100644
>>>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>>>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>>>> @@ -1341,6 +1341,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>>>>  	case V4L2_META_FMT_UVC:		descr = "UVC Payload Header Metadata"; break;
>>>>  	case V4L2_META_FMT_D4XX:	descr = "Intel D4xx UVC Metadata"; break;
>>>>  	case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
>>>> +	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A params"; break;
>>>
>>> params -> Params
>>>
>>>> +	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A statistics"; break;
>>>
>>> statistics -> Statistics
>>>
>>>>  
>>>>  	default:
>>>>  		/* Compressed formats */
>>>> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
>>>> index f98bbcced8ff..56798b09cd85 100644
>>>> --- a/include/uapi/linux/videodev2.h
>>>> +++ b/include/uapi/linux/videodev2.h
> 
> Can we avoid touching videodev2.h, as we did for the stateless codec pixfmts?

I think it should be part of the uapi, as it is the metadata format used in the video output device.
I propose to leave it inside drivers/staging/media/rkisp1/uapi/rkisp1-config.h while the driver is in staging,
then we expose it later with a better documentation too. Make sense?

Thanks,
Helen

> 
> Thanks,
> Ezequiel
> 
>>>> @@ -762,6 +762,10 @@ struct v4l2_pix_format {
>>>>  #define V4L2_META_FMT_D4XX        v4l2_fourcc('D', '4', 'X', 'X') /* D4XX Payload Header metadata */
>>>>  #define V4L2_META_FMT_VIVID	  v4l2_fourcc('V', 'I', 'V', 'D') /* Vivid Metadata */
>>>>  
>>>> +/* Vendor specific - used for RK_ISP1 camera sub-system */
>>>> +#define V4L2_META_FMT_RK_ISP1_PARAMS	v4l2_fourcc('R', 'K', '1', 'P') /* Rockchip ISP1 params */
>>>> +#define V4L2_META_FMT_RK_ISP1_STAT_3A	v4l2_fourcc('R', 'K', '1', 'S') /* Rockchip ISP1 3A statistics */
>>>> +
>>>>  /* priv field value to indicates that subsequent fields are valid. */
>>>>  #define V4L2_PIX_FMT_PRIV_MAGIC		0xfeedcafe
>>>>  
>>>>
>>>
>>> Regards,
>>>
>>> 	Hans
>>>
> 
>