linux-kernel - Re: [PATCH v2 13/16] media: platform: rzg2l-cru: rzg2l-video: Use rzg2l_cru_ip_code_to

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Message-ID: <20240927230909.GM12322@pendragon.ideasonboard.com>
Date: Sat, 28 Sep 2024 02:09:09 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	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 v2 13/16] media: platform: rzg2l-cru: rzg2l-video: Use
 rzg2l_cru_ip_code_to_fmt() to validate format

Hi Prabhakar,

Thank you for the patch.

On Tue, Sep 10, 2024 at 06:53:54PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Utilize `rzg2l_cru_ip_code_to_fmt()` in `rzg2l_cru_mc_validate_format()`
> to validate whether the format is supported. This change removes the need
> to manually add new entries when a new format is added to the CRU driver,
> simplifying the validation process.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
>  drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> index 014c0ff2721b..c32608c557a3 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> @@ -201,12 +201,8 @@ static int rzg2l_cru_mc_validate_format(struct rzg2l_cru_dev *cru,
>  	if (v4l2_subdev_call_state_active(sd, pad, get_fmt, &fmt))
>  		return -EPIPE;
>  
> -	switch (fmt.format.code) {
> -	case MEDIA_BUS_FMT_UYVY8_1X16:
> -		break;
> -	default:
> +	if (!rzg2l_cru_ip_code_to_fmt(fmt.format.code))
>  		return -EPIPE;
> -	}

This looks fine, but I think you should take it one step further and
perform format validation in .link_validate(). See
https://lore.kernel.org/all/20240826124106.3823-8-laurent.pinchart+renesas@ideasonboard.com/

>  
>  	switch (fmt.format.field) {
>  	case V4L2_FIELD_TOP:

-- 
Regards,

Laurent Pinchart