linux-kernel - Re: [PATCH v3 1/3] media: imx8mq-mipi-csi2: Add data type field in pixel format

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Message-ID: <aJtoDVBUUHyPITQS@lizhi-Precision-Tower-5810>
Date: Tue, 12 Aug 2025 12:13:01 -0400
From: Frank Li <Frank.li@....com>
To: guoniu.zhou@....nxp.com
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, rmfrfs@...il.com,
	laurent.pinchart@...asonboard.com, martink@...teo.de,
	kernel@...i.sm, mchehab@...nel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, shawnguo@...nel.org,
	s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com
Subject: Re: [PATCH v3 1/3] media: imx8mq-mipi-csi2: Add data type field in
 pixel format

On Tue, Aug 12, 2025 at 05:18:55PM +0800, guoniu.zhou@....nxp.com wrote:
> From: Guoniu Zhou <guoniu.zhou@....com>
>
> Add data type field in CSI pixel format info since the downstream
> subdev in the pipeline need to know.
>
> Signed-off-by: Guoniu Zhou <guoniu.zhou@....com>
> ---
>  drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 23 +++++++++++++++++++
>  1 file changed, 23 insertions(+)
>
> diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> index 3a4645f59a44..7495400adc22 100644
> --- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> +++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> @@ -25,6 +25,7 @@
>  #include <linux/reset.h>
>  #include <linux/spinlock.h>
>
> +#include <media/mipi-csi2.h>
>  #include <media/v4l2-common.h>
>  #include <media/v4l2-device.h>
>  #include <media/v4l2-fwnode.h>
> @@ -138,6 +139,7 @@ struct csi_state {
>
>  struct csi2_pix_format {
>  	u32 code;
> +	u32 data_type;
>  	u8 width;
>  };
>
> @@ -262,68 +264,89 @@ static const struct csi2_pix_format imx8mq_mipi_csi_formats[] = {
>  	/* RAW (Bayer and greyscale) formats. */
>  	{
>  		.code = MEDIA_BUS_FMT_SBGGR8_1X8,
> +		.data_type = MIPI_CSI2_DT_RAW8,

CSI2 data type is well defined in MIPI CSI2 spec. so the convertion from
media_bus_fmt to CSI2 DT is fixed patten for all CSI2 drivers.

I post one patch at
https://lore.kernel.org/imx/20250808-95_cam-v2-4-4b29fa6919a7@nxp.com/

helper funciton media_bus_fmt_to_csi2_dt(.code) to get CSI2 data type.

Laurent Pinchart have not time to review patch until sept 8. I hope first
3 patches can be reviewed and merged soon if they agree this methods.

also .width can be removed.

Frank

>  		.width = 8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG8_1X8,
> +		.data_type = MIPI_CSI2_DT_RAW8,
>  		.width = 8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG8_1X8,
> +		.data_type = MIPI_CSI2_DT_RAW8,
>  		.width = 8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB8_1X8,
> +		.data_type = MIPI_CSI2_DT_RAW8,
>  		.width = 8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_Y8_1X8,
> +		.data_type = MIPI_CSI2_DT_RAW8,
>  		.width = 8,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SBGGR10_1X10,
> +		.data_type = MIPI_CSI2_DT_RAW10,
>  		.width = 10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG10_1X10,
> +		.data_type = MIPI_CSI2_DT_RAW10,
>  		.width = 10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG10_1X10,
> +		.data_type = MIPI_CSI2_DT_RAW10,
>  		.width = 10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB10_1X10,
> +		.data_type = MIPI_CSI2_DT_RAW10,
>  		.width = 10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_Y10_1X10,
> +		.data_type = MIPI_CSI2_DT_RAW10,
>  		.width = 10,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SBGGR12_1X12,
> +		.data_type = MIPI_CSI2_DT_RAW12,
>  		.width = 12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG12_1X12,
> +		.data_type = MIPI_CSI2_DT_RAW12,
>  		.width = 12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG12_1X12,
> +		.data_type = MIPI_CSI2_DT_RAW12,
>  		.width = 12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB12_1X12,
> +		.data_type = MIPI_CSI2_DT_RAW12,
>  		.width = 12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_Y12_1X12,
> +		.data_type = MIPI_CSI2_DT_RAW12,
>  		.width = 12,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SBGGR14_1X14,
> +		.data_type = MIPI_CSI2_DT_RAW14,
>  		.width = 14,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGBRG14_1X14,
> +		.data_type = MIPI_CSI2_DT_RAW14,
>  		.width = 14,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SGRBG14_1X14,
> +		.data_type = MIPI_CSI2_DT_RAW14,
>  		.width = 14,
>  	}, {
>  		.code = MEDIA_BUS_FMT_SRGGB14_1X14,
> +		.data_type = MIPI_CSI2_DT_RAW14,
>  		.width = 14,
>  	},
>  	/* YUV formats */
>  	{
>  		.code = MEDIA_BUS_FMT_YUYV8_1X16,
> +		.data_type = MIPI_CSI2_DT_YUV422_8B,
>  		.width = 16,
>  	}, {
>  		.code = MEDIA_BUS_FMT_UYVY8_1X16,
> +		.data_type = MIPI_CSI2_DT_YUV422_8B,
>  		.width = 16,
>  	}
>  };
> --
> 2.34.1
>