linux-kernel - Re: [PATCH v4 06/10] media: Add C3ISP_PARAMS and C3ISP

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Message-ID: <6h2epavsgxonytbar2wv7qv6ojuzryst6gqjcceuccoxubwh64@5wqchwktrivu>
Date: Wed, 11 Dec 2024 17:04:44 +0100
From: Jacopo Mondi <jacopo.mondi@...asonboard.com>
To: keke.li@...ogic.com
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, kieran.bingham@...asonboard.com, 
	laurent.pinchart@...asonboard.com, dan.scally@...asonboard.com
Subject: Re: [PATCH v4 06/10] media: Add C3ISP_PARAMS and C3ISP_STATS meta
 formats

Hi Keke

On Thu, Dec 05, 2024 at 05:04:32PM +0800, Keke Li via B4 Relay wrote:
> From: Keke Li <keke.li@...ogic.com>
>
> C3ISP_PARAMS is the C3 ISP Parameters format.
> C3ISP_STATS is the C3 ISP Statistics format.
>
> Reviewed-by: Daniel Scally <dan.scally@...asonboard.com>
> Signed-off-by: Keke Li <keke.li@...ogic.com>
> ---
>  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 0304daa8471d..dae34b1170d7 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1460,6 +1460,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>  	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A Parameters"; break;
>  	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A Statistics"; break;
>  	case V4L2_META_FMT_RK_ISP1_EXT_PARAMS:	descr = "Rockchip ISP1 Ext 3A Params"; break;
> +	case V4L2_META_FMT_C3ISP_PARAMS:	descr = "Amlogic C3 ISP Parameters"; break;
> +	case V4L2_META_FMT_C3ISP_STATS:		descr = "Amlogic C3 ISP Statistics"; break;
>  	case V4L2_PIX_FMT_NV12_8L128:	descr = "NV12 (8x128 Linear)"; break;
>  	case V4L2_PIX_FMT_NV12M_8L128:	descr = "NV12M (8x128 Linear)"; break;
>  	case V4L2_PIX_FMT_NV12_10BE_8L128:	descr = "10-bit NV12 (8x128 Linear, BE)"; break;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index e7c4dce39007..eda30640a7a3 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -858,6 +858,10 @@ struct v4l2_pix_format {
>  #define V4L2_META_FMT_RK_ISP1_STAT_3A	v4l2_fourcc('R', 'K', '1', 'S') /* Rockchip ISP1 3A Statistics */
>  #define V4L2_META_FMT_RK_ISP1_EXT_PARAMS	v4l2_fourcc('R', 'K', '1', 'E') /* Rockchip ISP1 3a Extensible Parameters */
>
> +/* Vendor specific - used for C3_ISP */
> +#define V4L2_META_FMT_C3ISP_PARAMS	v4l2_fourcc('C', 'P', 'R', 'M') /* Amlogic C3 ISP Parameters */
> +#define V4L2_META_FMT_C3ISP_STATS	v4l2_fourcc('C', 'S', 'T', 'S') /* Amlogic C3 ISP Statistics */

I would have used ('C', '3', 'P', 'M') and ('C', '3', 'S', 'T').
Matter of tastes I guess, but if you will happen to have a different
format for, say, C7, this would help keeping them separate.

Up to you
Reviewed-by: Jacopo Mondi <jacopo.mondi@...asonboard.com>

Thanks
  j

> +
>  /* Vendor specific - used for RaspberryPi PiSP */
>  #define V4L2_META_FMT_RPI_BE_CFG	v4l2_fourcc('R', 'P', 'B', 'C') /* PiSP BE configuration */
>  #define V4L2_META_FMT_RPI_FE_CFG	v4l2_fourcc('R', 'P', 'F', 'C') /* PiSP FE configuration */
>
> --
> 2.47.0
>
>
>