linux-kernel - Re: [PATCH v5 11/22] media: rzg2l-cru: Simplify configuring input format for image processing

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Message-ID: <20241015102240.GG5682@pendragon.ideasonboard.com>
Date: Tue, 15 Oct 2024 13:22:40 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v5 11/22] media: rzg2l-cru: Simplify configuring input
 format for image processing

Hi Prabhakar,

Thank you for the patch.

On Fri, Oct 11, 2024 at 06:30:41PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Move the `rzg2l_cru_ip_format` struct to `rzg2l-cru.h` for better
> accessibility and add a `datatype` member to it, allowing the
> configuration of the ICnMC register based on the MIPI CSI2 data type.
> 
> Also, move the `rzg2l_cru_ip_code_to_fmt()` function to `rzg2l-cru.h`
> to streamline format lookup and make it more accessible across the
> driver.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

> ---
>  .../media/platform/renesas/rzg2l-cru/rzg2l-cru.h    | 12 ++++++++++++
>  drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c | 13 +++++++------
>  .../media/platform/renesas/rzg2l-cru/rzg2l-video.c  | 13 +++++++------
>  3 files changed, 26 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> index 4fe24bdde5b2..9b1ba015df3b 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> @@ -62,6 +62,16 @@ struct rzg2l_cru_ip {
>  	struct v4l2_subdev *remote;
>  };
>  
> +/**
> + * struct rzg2l_cru_ip_format - CRU IP format
> + * @code: Media bus code
> + * @datatype: MIPI CSI2 data type
> + */
> +struct rzg2l_cru_ip_format {
> +	u32 code;
> +	u32 datatype;
> +};
> +
>  /**
>   * struct rzg2l_cru_dev - Renesas CRU device structure
>   * @dev:		(OF) device
> @@ -150,4 +160,6 @@ int rzg2l_cru_ip_subdev_register(struct rzg2l_cru_dev *cru);
>  void rzg2l_cru_ip_subdev_unregister(struct rzg2l_cru_dev *cru);
>  struct v4l2_mbus_framefmt *rzg2l_cru_ip_get_src_fmt(struct rzg2l_cru_dev *cru);
>  
> +const struct rzg2l_cru_ip_format *rzg2l_cru_ip_code_to_fmt(unsigned int code);
> +
>  #endif
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> index 7b006a0bfaae..8f9683bf31fa 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> @@ -6,17 +6,18 @@
>   */
>  
>  #include <linux/delay.h>
> -#include "rzg2l-cru.h"
> +#include <media/mipi-csi2.h>
>  
> -struct rzg2l_cru_ip_format {
> -	u32 code;
> -};
> +#include "rzg2l-cru.h"
>  
>  static const struct rzg2l_cru_ip_format rzg2l_cru_ip_formats[] = {
> -	{ .code = MEDIA_BUS_FMT_UYVY8_1X16, },
> +	{
> +		.code = MEDIA_BUS_FMT_UYVY8_1X16,
> +		.datatype = MIPI_CSI2_DT_YUV422_8B,
> +	},
>  };
>  
> -static const struct rzg2l_cru_ip_format *rzg2l_cru_ip_code_to_fmt(unsigned int code)
> +const struct rzg2l_cru_ip_format *rzg2l_cru_ip_code_to_fmt(unsigned int code)
>  {
>  	unsigned int i;
>  
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> index 401ef7be58ec..37fea2bed00f 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> @@ -301,18 +301,17 @@ static void rzg2l_cru_initialize_axi(struct rzg2l_cru_dev *cru)
>  }
>  
>  static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru, bool *input_is_yuv,
> -				 struct v4l2_mbus_framefmt *ip_sd_fmt, u8 csi_vc)
> +				 const struct rzg2l_cru_ip_format *ip_fmt,
> +				 u8 csi_vc)
>  {
> -	u32 icnmc;
> +	u32 icnmc = ICnMC_INF(ip_fmt->datatype);
>  
> -	switch (ip_sd_fmt->code) {
> +	switch (ip_fmt->code) {
>  	case MEDIA_BUS_FMT_UYVY8_1X16:
> -		icnmc = ICnMC_INF(MIPI_CSI2_DT_YUV422_8B);
>  		*input_is_yuv = true;
>  		break;
>  	default:
>  		*input_is_yuv = false;
> -		icnmc = ICnMC_INF(MIPI_CSI2_DT_USER_DEFINED(0));
>  		break;
>  	}
>  
> @@ -328,11 +327,13 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
>  					   struct v4l2_mbus_framefmt *ip_sd_fmt,
>  					   u8 csi_vc)
>  {
> +	const struct rzg2l_cru_ip_format *cru_ip_fmt;
>  	bool output_is_yuv = false;
>  	bool input_is_yuv = false;
>  	u32 icndmr;
>  
> -	rzg2l_cru_csi2_setup(cru, &input_is_yuv, ip_sd_fmt, csi_vc);
> +	cru_ip_fmt = rzg2l_cru_ip_code_to_fmt(ip_sd_fmt->code);
> +	rzg2l_cru_csi2_setup(cru, &input_is_yuv, cru_ip_fmt, csi_vc);
>  
>  	/* Output format */
>  	switch (cru->format.pixelformat) {
> 

-- 
Regards,

Laurent Pinchart