linux-kernel - Re: [PATCH] drm/fourcc: Add Arm 16x16 block modifier

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Message-ID: <20190621124458.rxa5djcmzd6lwkmy@DESKTOP-E1NTVVP.localdomain>
Date:   Fri, 21 Jun 2019 12:44:59 +0000
From:   Brian Starkey <Brian.Starkey@....com>
To:     Raymond Smith <Raymond.Smith@....com>
CC:     "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
        "sean@...rly.run" <sean@...rly.run>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "yuq825@...il.com" <yuq825@...il.com>,
        Ayan Halder <Ayan.Halder@....com>,
        "malidp@...s.arm.com" <malidp@...s.arm.com>, nd <nd@....com>
Subject: Re: [PATCH] drm/fourcc: Add Arm 16x16 block modifier

On Fri, Jun 21, 2019 at 11:21:08AM +0100, Raymond Smith wrote:
> Add the DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED modifier to
> denote the 16x16 block u-interleaved format used in Arm Utgard and
> Midgard GPUs.
> 
> Signed-off-by: Raymond Smith <raymond.smith@....com>

Reviewed-by: Brian Starkey <brian.starkey@....com>

Thanks for chasing this down!

> ---
>  include/uapi/drm/drm_fourcc.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index 3feeaa3..8ed7ecf 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -743,6 +743,16 @@ extern "C" {
>  #define AFBC_FORMAT_MOD_BCH     (1ULL << 11)
>  
>  /*
> + * Arm 16x16 Block U-Interleaved modifier
> + *
> + * This is used by Arm Mali Utgard and Midgard GPUs. It divides the image
> + * into 16x16 pixel blocks. Blocks are stored linearly in order, but pixels
> + * in the block are reordered.
> + */
> +#define DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED \
> +	fourcc_mod_code(ARM, ((1ULL << 55) | 1))
> +
> +/*
>   * Allwinner tiled modifier
>   *
>   * This tiling mode is implemented by the VPU found on all Allwinner platforms,
> -- 
> 2.7.4
>