linux-kernel - Re: [PATCH v5 05/11] drm/fourcc: Add DRM_FORMAT

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Message-ID: <7e772d53-e151-4b20-8ec5-1d57bfb5f4eb@amd.com>
Date: Wed, 3 Sep 2025 15:59:55 +0200
From: "Sagar, Vishal" <vishal.sagar@....com>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
 Anatoliy Klymenko <anatoliy.klymenko@....com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Michal Simek <michal.simek@....com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,
 Geert Uytterhoeven <geert@...ux-m68k.org>,
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
 Pekka Paalanen <ppaalanen@...il.com>
Subject: Re: [PATCH v5 05/11] drm/fourcc: Add DRM_FORMAT_X403

Hi Tomi,

Thanks for the patch.

On 4/25/2025 1:01 PM, Tomi Valkeinen wrote:
> Add X403, a 3 plane 10 bits per component non-subsampled YCbCr format.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
>   drivers/gpu/drm/drm_fourcc.c  | 3 +++
>   include/uapi/drm/drm_fourcc.h | 9 +++++++++
>   2 files changed, 12 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
> index e5f04f7ec164..60684f99f4a7 100644
> --- a/drivers/gpu/drm/drm_fourcc.c
> +++ b/drivers/gpu/drm/drm_fourcc.c
> @@ -356,6 +356,9 @@ const struct drm_format_info *__drm_format_info(u32 format)
>   		{ .format = DRM_FORMAT_Y10_P32,		.depth = 0,  .num_planes = 1,
>   		  .char_per_block = { 4, 0, 0 }, .block_w = { 3, 0, 0 }, .block_h = { 1, 0, 0 },
>   		  .hsub = 1, .vsub = 1, .is_yuv = true },
> +		{ .format = DRM_FORMAT_X403,		.depth = 0,  .num_planes = 3,
> +		  .char_per_block = { 4, 4, 4 }, .block_w = { 3, 3, 3 }, .block_h = { 1, 1, 1 },
> +		  .hsub = 1, .vsub = 1, .is_yuv = true },
>   	};
>   
>   	unsigned int i;
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index fceb7a2dfeb4..df3dbc36c26b 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -385,6 +385,15 @@ extern "C" {
>    */
>   #define DRM_FORMAT_Q401		fourcc_code('Q', '4', '0', '1')
>   
> +/*
> + * 3 plane non-subsampled (444) YCbCr
> + * 10 bpc, 30 bits per sample image data in a single contiguous buffer.
> + * index 0: Y plane,  [31:0] x:Y2:Y1:Y0    [2:10:10:10] little endian
> + * index 1: Cb plane, [31:0] x:Cb2:Cb1:Cb0 [2:10:10:10] little endian
> + * index 2: Cr plane, [31:0] x:Cr2:Cr1:Cr0 [2:10:10:10] little endian
> + */
> +#define DRM_FORMAT_X403		fourcc_code('X', '4', '0', '3')
> +
>   /*
>    * 3 plane YCbCr
>    * index 0: Y plane, [7:0] Y
> 

This looks good to me.

Reviewed-by: Vishal Sagar <vishal.sagar@....com>

Regards
Vishal Sagar