linux-kernel - Re: [PATCH 2/5] drm: shmobile: Add support for DRM_FORMAT

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Date:   Wed, 5 Apr 2023 06:06:07 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] drm: shmobile: Add support for DRM_FORMAT_XRGB8888

Hi Geert,

Thank you for the patch.

On Fri, Mar 31, 2023 at 04:48:08PM +0200, Geert Uytterhoeven wrote:
> DRM_FORMAT_XRGB8888 aka XR24 is the modus francus of DRM, and should be
> supported by all drivers.
> 
> The handling for DRM_FORMAT_XRGB8888 is similar to DRM_FORMAT_ARGB8888,
> just ignore the alpha channel.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

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

> ---
>  drivers/gpu/drm/shmobile/shmob_drm_crtc.c  | 1 +
>  drivers/gpu/drm/shmobile/shmob_drm_kms.c   | 5 +++++
>  drivers/gpu/drm/shmobile/shmob_drm_plane.c | 5 +++++
>  3 files changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/shmobile/shmob_drm_crtc.c b/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
> index 713a7612244c647a..08dc1428aa16caf0 100644
> --- a/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
> +++ b/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
> @@ -232,6 +232,7 @@ static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
>  		value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
>  		break;
>  	case DRM_FORMAT_ARGB8888:
> +	case DRM_FORMAT_XRGB8888:
>  	default:
>  		value = LDDDSR_LS;
>  		break;
> diff --git a/drivers/gpu/drm/shmobile/shmob_drm_kms.c b/drivers/gpu/drm/shmobile/shmob_drm_kms.c
> index 3c5fe3bc183c7c13..99381cc0abf3ae1f 100644
> --- a/drivers/gpu/drm/shmobile/shmob_drm_kms.c
> +++ b/drivers/gpu/drm/shmobile/shmob_drm_kms.c
> @@ -39,6 +39,11 @@ static const struct shmob_drm_format_info shmob_drm_format_infos[] = {
>  		.bpp = 32,
>  		.yuv = false,
>  		.lddfr = LDDFR_PKF_ARGB32,
> +	}, {
> +		.fourcc = DRM_FORMAT_XRGB8888,
> +		.bpp = 32,
> +		.yuv = false,
> +		.lddfr = LDDFR_PKF_ARGB32,
>  	}, {
>  		.fourcc = DRM_FORMAT_NV12,
>  		.bpp = 12,
> diff --git a/drivers/gpu/drm/shmobile/shmob_drm_plane.c b/drivers/gpu/drm/shmobile/shmob_drm_plane.c
> index 604ae23825daaafd..850986cee848226a 100644
> --- a/drivers/gpu/drm/shmobile/shmob_drm_plane.c
> +++ b/drivers/gpu/drm/shmobile/shmob_drm_plane.c
> @@ -80,6 +80,7 @@ static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
>  		format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
>  		break;
>  	case DRM_FORMAT_ARGB8888:
> +	case DRM_FORMAT_XRGB8888:
>  	default:
>  		format |= LDBBSIFR_SWPL;
>  		break;
> @@ -95,6 +96,9 @@ static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
>  	case DRM_FORMAT_ARGB8888:
>  		format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
>  		break;
> +	case DRM_FORMAT_XRGB8888:
> +		format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
> +		break;
>  	case DRM_FORMAT_NV12:
>  	case DRM_FORMAT_NV21:
>  		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
> @@ -231,6 +235,7 @@ static const uint32_t formats[] = {
>  	DRM_FORMAT_RGB565,
>  	DRM_FORMAT_RGB888,
>  	DRM_FORMAT_ARGB8888,
> +	DRM_FORMAT_XRGB8888,
>  	DRM_FORMAT_NV12,
>  	DRM_FORMAT_NV21,
>  	DRM_FORMAT_NV16,

-- 
Regards,

Laurent Pinchart