linux-kernel - Re: [PATCH v4 2/4] media: imx8mq-mipi-csi2: Add output filed in csi2_pix

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Message-ID: <aKSbLOdACTwuPZb4@lizhi-Precision-Tower-5810>
Date: Tue, 19 Aug 2025 11:41:32 -0400
From: Frank Li <Frank.li@....com>
To: Guoniu Zhou <guoniu.zhou@....com>
Cc: Rui Miguel Silva <rmfrfs@...il.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Martin Kepplinger <martink@...teo.de>,
	Purism Kernel Team <kernel@...i.sm>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux-media@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/4] media: imx8mq-mipi-csi2: Add output filed in
 csi2_pix_format

On Tue, Aug 19, 2025 at 11:58:01AM +0800, Guoniu Zhou wrote:
> Add output filed in csi2_pix_format since the format on the
> source pad might change due to unpacking.
>
> Signed-off-by: Guoniu Zhou <guoniu.zhou@....com>
> ---
>  drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> index 85700655ecad334c61e9b5f9f073e10b6db2618f..43d766b95eb42b21be893ddfda44119101c9afe3 100644
> --- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> +++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> @@ -139,6 +139,7 @@ struct csi_state {
>
>  struct csi2_pix_format {
>  	u32 code;
> +	u32 output;
>  };
>
>  /* -----------------------------------------------------------------------------
> @@ -262,48 +263,69 @@ static const struct csi2_pix_format imx8mq_mipi_csi_formats[] = {
>  	/* RAW (Bayer and greyscale) formats. */
>  	{
>  		.code = MEDIA_BUS_FMT_SBGGR8_1X8,
> +		.output = MEDIA_BUS_FMT_SBGGR8_1X8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG8_1X8,
> +		.output = MEDIA_BUS_FMT_SGBRG8_1X8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG8_1X8,
> +		.output = MEDIA_BUS_FMT_SGRBG8_1X8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB8_1X8,
> +		.output = MEDIA_BUS_FMT_SRGGB8_1X8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_Y8_1X8,
> +		.output = MEDIA_BUS_FMT_Y8_1X8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SBGGR10_1X10,
> +		.output = MEDIA_BUS_FMT_SBGGR10_1X10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG10_1X10,
> +		.output = MEDIA_BUS_FMT_SGBRG10_1X10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG10_1X10,
> +		.output = MEDIA_BUS_FMT_SGRBG10_1X10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB10_1X10,
> +		.output = MEDIA_BUS_FMT_SRGGB10_1X10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_Y10_1X10,
> +		.output = MEDIA_BUS_FMT_Y10_1X10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SBGGR12_1X12,
> +		.output = MEDIA_BUS_FMT_SBGGR12_1X12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG12_1X12,
> +		.output = MEDIA_BUS_FMT_SGBRG12_1X12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG12_1X12,
> +		.output = MEDIA_BUS_FMT_SGRBG12_1X12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB12_1X12,
> +		.output = MEDIA_BUS_FMT_SRGGB12_1X12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_Y12_1X12,
> +		.output = MEDIA_BUS_FMT_Y12_1X12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SBGGR14_1X14,
> +		.output = MEDIA_BUS_FMT_SBGGR14_1X14,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG14_1X14,
> +		.output = MEDIA_BUS_FMT_SGBRG14_1X14,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG14_1X14,
> +		.output = MEDIA_BUS_FMT_SGRBG14_1X14,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB14_1X14,
> +		.output = MEDIA_BUS_FMT_SRGGB14_1X14,
>  	},
>  	/* YUV formats */
>  	{
>  		.code = MEDIA_BUS_FMT_YUYV8_1X16,
> +		.output = MEDIA_BUS_FMT_YUYV8_1X16,
>  	}, {
>  		.code = MEDIA_BUS_FMT_UYVY8_1X16,
> +		.output = MEDIA_BUS_FMT_UYVY8_1X16,


All is the same, Can treat 0 as the same as .code to avoid dupicate these
data.

Frank

>  	},
>  };
>
> @@ -634,6 +656,9 @@ static int imx8mq_mipi_csi_set_fmt(struct v4l2_subdev *sd,
>  	fmt = v4l2_subdev_state_get_format(sd_state, MIPI_CSI2_PAD_SOURCE);
>  	*fmt = sdformat->format;
>
> +	/* The format on the source pad might change due to unpacking. */
> +	fmt->code = csi2_fmt->output;
> +
>  	return 0;
>  }
>
>
> --
> 2.34.1
>