linux-kernel - Re: [PATCH 22/39] drm: renesas: shmobile: Use media bus formats in platform data

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Message-ID: <20230623155456.GZ2112@pendragon.ideasonboard.com>
Date:   Fri, 23 Jun 2023 18:54:56 +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>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Magnus Damm <magnus.damm@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 22/39] drm: renesas: shmobile: Use media bus formats in
 platform data

Hi Geert,

Thank you for the patch.


On Thu, Jun 22, 2023 at 11:21:34AM +0200, Geert Uytterhoeven wrote:
> Replace the custom shmob_drm_interface enumeration values with standard
> media bus formats.  This simplifies driver handling of bus formats and
> prepares for DT support.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

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

> ---
>  .../gpu/drm/renesas/shmobile/shmob_drm_drv.c  | 52 +++++++++++++------
>  include/linux/platform_data/shmob_drm.h       | 13 +----
>  2 files changed, 38 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> index 1a1d66c6e817e227..e5be0ae99bd970be 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> @@ -9,6 +9,7 @@
>  
>  #include <linux/clk.h>
>  #include <linux/io.h>
> +#include <linux/media-bus-format.h>
>  #include <linux/mm.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
> @@ -34,24 +35,45 @@
>  
>  static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
>  {
> -	static const u32 ldmt1r[] = {
> -		[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
> -		[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
> -		[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
> -		[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
> -		[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
> -		[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
> -		[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
> -		[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
> -	};
> -
> -	if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
> -		dev_err(sdev->dev, "invalid interface type %u\n",
> -			sdev->pdata->iface.interface);
> +	switch (sdev->pdata->iface.bus_fmt) {
> +	case MEDIA_BUS_FMT_RGB888_3X8:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB8;
> +		break;
> +
> +	case MEDIA_BUS_FMT_RGB666_2X9_BE:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB9;
> +		break;
> +
> +	case MEDIA_BUS_FMT_RGB888_2X12_BE:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB12A;
> +		break;
> +
> +	case MEDIA_BUS_FMT_RGB444_1X12:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB12B;
> +		break;
> +
> +	case MEDIA_BUS_FMT_RGB565_1X16:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB16;
> +		break;
> +
> +	case MEDIA_BUS_FMT_RGB666_1X18:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB18;
> +		break;
> +
> +	case MEDIA_BUS_FMT_RGB888_1X24:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_RGB24;
> +		break;
> +
> +	case MEDIA_BUS_FMT_UYVY8_1X16:
> +		sdev->ldmt1r = LDMT1R_MIFTYP_YCBCR;
> +		break;
> +
> +	default:
> +		dev_err(sdev->dev, "invalid bus format 0x%x\n",
> +			sdev->pdata->iface.bus_fmt);
>  		return -EINVAL;
>  	}
>  
> -	sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
>  	return 0;
>  }
>  
> diff --git a/include/linux/platform_data/shmob_drm.h b/include/linux/platform_data/shmob_drm.h
> index f3cb19ff9f818aca..5047e66f0a6823ba 100644
> --- a/include/linux/platform_data/shmob_drm.h
> +++ b/include/linux/platform_data/shmob_drm.h
> @@ -18,17 +18,6 @@ enum shmob_drm_clk_source {
>  	SHMOB_DRM_CLK_EXTERNAL,
>  };
>  
> -enum shmob_drm_interface {
> -	SHMOB_DRM_IFACE_RGB8,		/* 24bpp, 8:8:8 */
> -	SHMOB_DRM_IFACE_RGB9,		/* 18bpp, 9:9 */
> -	SHMOB_DRM_IFACE_RGB12A,		/* 24bpp, 12:12 */
> -	SHMOB_DRM_IFACE_RGB12B,		/* 12bpp */
> -	SHMOB_DRM_IFACE_RGB16,		/* 16bpp */
> -	SHMOB_DRM_IFACE_RGB18,		/* 18bpp */
> -	SHMOB_DRM_IFACE_RGB24,		/* 24bpp */
> -	SHMOB_DRM_IFACE_YUV422,		/* 16bpp */
> -};
> -
>  struct shmob_drm_panel_data {
>  	unsigned int width_mm;		/* Panel width in mm */
>  	unsigned int height_mm;		/* Panel height in mm */
> @@ -36,7 +25,7 @@ struct shmob_drm_panel_data {
>  };
>  
>  struct shmob_drm_interface_data {
> -	enum shmob_drm_interface interface;
> +	unsigned int bus_fmt;		/* MEDIA_BUS_FMT_RGB888_* */
>  	unsigned int clk_div;
>  };
>  

-- 
Regards,

Laurent Pinchart