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Date:   Tue, 22 Nov 2022 01:21:56 +0200
From:   Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To:     Umang Jain <umang.jain@ideasonboard.com>
Cc:     linux-media@vger.kernel.org, kernel-list@raspberrypi.com,
        linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org,
        linux-staging@lists.linux.dev,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@broadcom.com>,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Naushir Patuck <naush@raspberrypi.com>,
        David Plowman <david.plowman@raspberrypi.com>,
        Kieran Bingham <kieran.bingham@ideasonboard.com>
Subject: Re: [PATCH 06/14] staging: mmal_vchiq: Add image formats to be used
 by bcm2835-isp
Message-ID: <Y3wIFNGQst623Se4@pendragon.ideasonboard.com>
References: <20221121214722.22563-1-umang.jain@ideasonboard.com>
 <20221121214722.22563-7-umang.jain@ideasonboard.com>
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In-Reply-To: <20221121214722.22563-7-umang.jain@ideasonboard.com>
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Hi Umang and Dave,

Thank you for the patch.

On Tue, Nov 22, 2022 at 03:17:14AM +0530, Umang Jain wrote:
> From: Dave Stevenson <dave.stevenson@raspberrypi.com>
> 
> The bcm2835-isp supports Bayer, so add in the encodings for them.
> Also, Add support for monochrome image formats in the various MIPI
> packings.
> 
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
> Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
> ---
>  .../vc04_services/vchiq-mmal/mmal-encodings.h | 62 +++++++++++++++++++
>  1 file changed, 62 insertions(+)
> 
> diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-encodings.h b/drivers/staging/vc04_services/vchiq-mmal/mmal-encodings.h
> index e15ae7b24f73..4711877a9711 100644
> --- a/drivers/staging/vc04_services/vchiq-mmal/mmal-encodings.h
> +++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-encodings.h
> @@ -69,6 +69,68 @@
>   */
>  #define MMAL_ENCODING_OPAQUE           MMAL_FOURCC('O', 'P', 'Q', 'V')
>  
> +/* Bayer formats

/*
 * Bayer formats

> + * FourCC values copied from V4L2 where defined.
> + */
> +/* 8 bit per pixel Bayer formats. */
> +#define MMAL_ENCODING_BAYER_SBGGR8     MMAL_FOURCC('B', 'A', '8', '1')
> +#define MMAL_ENCODING_BAYER_SGBRG8     MMAL_FOURCC('G', 'B', 'R', 'G')
> +#define MMAL_ENCODING_BAYER_SGRBG8     MMAL_FOURCC('G', 'R', 'B', 'G')
> +#define MMAL_ENCODING_BAYER_SRGGB8     MMAL_FOURCC('R', 'G', 'G', 'B')
> +
> +/* 10 bit per pixel packed Bayer formats. */
> +#define MMAL_ENCODING_BAYER_SBGGR10P   MMAL_FOURCC('p', 'B', 'A', 'A')
> +#define MMAL_ENCODING_BAYER_SGRBG10P   MMAL_FOURCC('p', 'g', 'A', 'A')
> +#define MMAL_ENCODING_BAYER_SGBRG10P   MMAL_FOURCC('p', 'G', 'A', 'A')

SGBRG should go before SGRBG, like for the raw 8 formats. Same below for
the 12P, 10 and 12 formats.

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

> +#define MMAL_ENCODING_BAYER_SRGGB10P   MMAL_FOURCC('p', 'R', 'A', 'A')
> +
> +/* 12 bit per pixel packed Bayer formats. */
> +#define MMAL_ENCODING_BAYER_SBGGR12P   MMAL_FOURCC('p', 'B', '1', '2')
> +#define MMAL_ENCODING_BAYER_SGRBG12P   MMAL_FOURCC('p', 'g', '1', '2')
> +#define MMAL_ENCODING_BAYER_SGBRG12P   MMAL_FOURCC('p', 'G', '1', '2')
> +#define MMAL_ENCODING_BAYER_SRGGB12P   MMAL_FOURCC('p', 'R', '1', '2')
> +
> +/* 14 bit per pixel Bayer formats. */
> +#define MMAL_ENCODING_BAYER_SBGGR14P   MMAL_FOURCC('p', 'B', 'E', 'E')
> +#define MMAL_ENCODING_BAYER_SGBRG14P   MMAL_FOURCC('p', 'G', 'E', 'E')
> +#define MMAL_ENCODING_BAYER_SGRBG14P   MMAL_FOURCC('p', 'g', 'E', 'E')
> +#define MMAL_ENCODING_BAYER_SRGGB14P   MMAL_FOURCC('p', 'R', 'E', 'E')
> +
> +/* 16 bit per pixel Bayer formats. */
> +#define MMAL_ENCODING_BAYER_SBGGR16    MMAL_FOURCC('B', 'G', '1', '6')
> +#define MMAL_ENCODING_BAYER_SGBRG16    MMAL_FOURCC('G', 'B', '1', '6')
> +#define MMAL_ENCODING_BAYER_SGRBG16    MMAL_FOURCC('G', 'R', '1', '6')
> +#define MMAL_ENCODING_BAYER_SRGGB16    MMAL_FOURCC('R', 'G', '1', '6')
> +
> +/* 10 bit per pixel unpacked (16bit) Bayer formats. */
> +#define MMAL_ENCODING_BAYER_SBGGR10    MMAL_FOURCC('B', 'G', '1', '0')
> +#define MMAL_ENCODING_BAYER_SGRBG10    MMAL_FOURCC('B', 'A', '1', '0')
> +#define MMAL_ENCODING_BAYER_SGBRG10    MMAL_FOURCC('G', 'B', '1', '0')
> +#define MMAL_ENCODING_BAYER_SRGGB10    MMAL_FOURCC('R', 'G', '1', '0')
> +
> +/* 12 bit per pixel unpacked (16bit) Bayer formats */
> +#define MMAL_ENCODING_BAYER_SBGGR12    MMAL_FOURCC('B', 'G', '1', '2')
> +#define MMAL_ENCODING_BAYER_SGRBG12    MMAL_FOURCC('B', 'A', '1', '2')
> +#define MMAL_ENCODING_BAYER_SGBRG12    MMAL_FOURCC('G', 'B', '1', '2')
> +#define MMAL_ENCODING_BAYER_SRGGB12    MMAL_FOURCC('R', 'G', '1', '2')
> +
> +/* 14 bit per pixel unpacked (16bit) Bayer formats */
> +#define MMAL_ENCODING_BAYER_SBGGR14    MMAL_FOURCC('B', 'G', '1', '4')
> +#define MMAL_ENCODING_BAYER_SGBRG14    MMAL_FOURCC('G', 'B', '1', '4')
> +#define MMAL_ENCODING_BAYER_SGRBG14    MMAL_FOURCC('G', 'R', '1', '4')
> +#define MMAL_ENCODING_BAYER_SRGGB14    MMAL_FOURCC('R', 'G', '1', '4')
> +
> +/* MIPI packed monochrome images */
> +#define MMAL_ENCODING_GREY    MMAL_FOURCC('G', 'R', 'E', 'Y')
> +#define MMAL_ENCODING_Y10P    MMAL_FOURCC('Y', '1', '0', 'P')
> +#define MMAL_ENCODING_Y12P    MMAL_FOURCC('Y', '1', '2', 'P')
> +#define MMAL_ENCODING_Y14P    MMAL_FOURCC('Y', '1', '4', 'P')
> +#define MMAL_ENCODING_Y16     MMAL_FOURCC('Y', '1', '6', ' ')
> +/* Unpacked monochrome formats (16bit per sample, but only N LSBs used) */
> +#define MMAL_ENCODING_Y10     MMAL_FOURCC('Y', '1', '0', ' ')
> +#define MMAL_ENCODING_Y12     MMAL_FOURCC('Y', '1', '2', ' ')
> +#define MMAL_ENCODING_Y14     MMAL_FOURCC('Y', '1', '4', ' ')
> +
>  /** An EGL image handle
>   */
>  #define MMAL_ENCODING_EGL_IMAGE        MMAL_FOURCC('E', 'G', 'L', 'I')

-- 
Regards,

Laurent Pinchart