linux-kernel - Re: [PATCH v5 09/11] drm: xlnx: zynqmp: Add support for Y8 and Y10

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Message-ID: <f377f304-395c-4c51-ae03-df76da3344b2@amd.com>
Date: Wed, 3 Sep 2025 16:01:02 +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 09/11] drm: xlnx: zynqmp: Add support for Y8 and
 Y10_P32

Hi Tomi,

Thanks for the patch.

On 4/25/2025 1:01 PM, Tomi Valkeinen wrote:
> Add support for Y8 and Y10_P32 formats. We also need to add new csc
> matrices for the y-only formats.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
>   drivers/gpu/drm/xlnx/zynqmp_disp.c | 26 +++++++++++++++++++++++++-
>   1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index 1dc77f2e4262..fe111fa8cc13 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -307,6 +307,16 @@ static const struct zynqmp_disp_format avbuf_vid_fmts[] = {
>   		.buf_fmt	= ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_10,
>   		.swap		= false,
>   		.sf		= scaling_factors_101010,
> +	}, {
> +		.drm_fmt	= DRM_FORMAT_Y8,
> +		.buf_fmt	= ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MONO,
> +		.swap		= false,
> +		.sf		= scaling_factors_888,
> +	}, {
> +		.drm_fmt	= DRM_FORMAT_Y10_P32,
> +		.buf_fmt	= ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YONLY_10,
> +		.swap		= false,
> +		.sf		= scaling_factors_101010,
>   	},
>   };
>   
> @@ -697,6 +707,16 @@ static const u32 csc_sdtv_to_rgb_offsets[] = {
>   	0x0, 0x1800, 0x1800
>   };
>   
> +static const u16 csc_sdtv_to_rgb_yonly_matrix[] = {
> +	0x0, 0x0, 0x1000,
> +	0x0, 0x0, 0x1000,
> +	0x0, 0x0, 0x1000,
> +};
> +
> +static const u32 csc_sdtv_to_rgb_yonly_offsets[] = {
> +	0x0, 0x0, 0x0
> +};
> +
>   /**
>    * zynqmp_disp_blend_set_output_format - Set the output format of the blender
>    * @disp: Display controller
> @@ -846,7 +866,11 @@ static void zynqmp_disp_blend_layer_enable(struct zynqmp_disp *disp,
>   				ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
>   				val);
>   
> -	if (layer->drm_fmt->is_yuv) {
> +	if (layer->drm_fmt->format == DRM_FORMAT_Y8 ||
> +	    layer->drm_fmt->format == DRM_FORMAT_Y10_P32) {
> +		coeffs = csc_sdtv_to_rgb_yonly_matrix;
> +		offsets = csc_sdtv_to_rgb_yonly_offsets;
> +	} else if (layer->drm_fmt->is_yuv) {
>   		coeffs = csc_sdtv_to_rgb_matrix;
>   		offsets = csc_sdtv_to_rgb_offsets;
>   	} else {
> 


This looks good. Feel free to add -

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

Regards
Vishal Sagar