linux-kernel - Re: [PATCH v6 01/14] media: uapi: Add some RGB bus formats for i.MX8qm/qxp pixel combiner

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Message-ID: <62306ab21ec234317ca4b8c2f06fc9cd4be0ead4.camel@toradex.com>
Date:   Tue, 23 Mar 2021 00:23:37 +0000
From:   Marcel Ziswiler <marcel.ziswiler@...adex.com>
To:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "victor.liu@....com" <victor.liu@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>
CC:     "narmstrong@...libre.com" <narmstrong@...libre.com>,
        "linux-imx@....com" <linux-imx@....com>,
        "robert.foss@...aro.org" <robert.foss@...aro.org>,
        "Laurent.pinchart@...asonboard.com" 
        <Laurent.pinchart@...asonboard.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "a.hajda@...sung.com" <a.hajda@...sung.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "jonas@...boo.se" <jonas@...boo.se>,
        "kishon@...com" <kishon@...com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "festevam@...il.com" <festevam@...il.com>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>,
        "jernej.skrabec@...l.net" <jernej.skrabec@...l.net>
Subject: Re: [PATCH v6 01/14] media: uapi: Add some RGB bus formats for
 i.MX8qm/qxp pixel combiner

On Wed, 2021-03-17 at 11:42 +0800, Liu Ying wrote:
> This patch adds RGB666_1X30_CPADLO, RGB888_1X30_CPADLO, RGB666_1X36_CPADLO
> and RGB888_1X36_CPADLO bus formats used by i.MX8qm/qxp pixel combiner.
> The RGB pixels with padding low per component are transmitted on a 30-bit
> input bus(10-bit per component) from a display controller or a 36-bit
> output bus(12-bit per component) to a pixel link.
> 
> Reviewed-by: Robert Foss <robert.foss-QSEj5FYQhm4dnm+yROfE0A@...lic.gmane.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@...lic.gmane.org>
> Signed-off-by: Liu Ying <victor.liu-3arQi8VN3Tc@...lic.gmane.org>
> ---
> v5->v6:
> * Add Laurent's R-b tag.
> 
> v4->v5:
> * Add Robert's R-b tag.
> 
> v3->v4:
> * No change.
> 
> v2->v3:
> * No change.
> 
> v1->v2:
> * No change.
> 
>  include/uapi/linux/media-bus-format.h | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h
> index 0dfc11e..ec3323d 100644
> --- a/include/uapi/linux/media-bus-format.h
> +++ b/include/uapi/linux/media-bus-format.h
> @@ -34,7 +34,7 @@
>  
>  #define MEDIA_BUS_FMT_FIXED                    0x0001
>  
> -/* RGB - next is       0x101e */
> +/* RGB - next is       0x1022 */
>  #define MEDIA_BUS_FMT_RGB444_1X12              0x1016
>  #define MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE      0x1001
>  #define MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE      0x1002
> @@ -59,9 +59,13 @@
>  #define MEDIA_BUS_FMT_RGB888_3X8_DELTA         0x101d
>  #define MEDIA_BUS_FMT_RGB888_1X7X4_SPWG                0x1011
>  #define MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA       0x1012
> +#define MEDIA_BUS_FMT_RGB666_1X30_CPADLO       0x101e
> +#define MEDIA_BUS_FMT_RGB888_1X30_CPADLO       0x101f
>  #define MEDIA_BUS_FMT_ARGB8888_1X32            0x100d
>  #define MEDIA_BUS_FMT_RGB888_1X32_PADHI                0x100f
>  #define MEDIA_BUS_FMT_RGB101010_1X30           0x1018
> +#define MEDIA_BUS_FMT_RGB666_1X36_CPADLO       0x1020
> +#define MEDIA_BUS_FMT_RGB888_1X36_CPADLO       0x1021
>  #define MEDIA_BUS_FMT_RGB121212_1X36           0x1019
>  #define MEDIA_BUS_FMT_RGB161616_1X48           0x101a

I haven't figured out what exactly the idea of this strange ordering of things is about? Could you enlighten
me?