linux-kernel - Re: [PATCH v2 3/6] drm/fourcc: Add drm/vs tiled modifiers

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Message-ID: <6f145485-c330-4a89-9e5a-af35d0b72e21@linaro.org>
Date:   Wed, 25 Oct 2023 18:28:04 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Keith Zhao <keith.zhao@...rfivetech.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Shengyang Chen <shengyang.chen@...rfivetech.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <mripard@...nel.org>,
        Jagan Teki <jagan@...eble.ai>,
        Rob Herring <robh+dt@...nel.org>,
        Chris Morgan <macromorgan@...mail.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Changhuang Liang <changhuang.liang@...rfivetech.com>,
        Jack Zhu <jack.zhu@...rfivetech.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Shawn Guo <shawnguo@...nel.org>, christian.koenig@....com
Subject: Re: [PATCH v2 3/6] drm/fourcc: Add drm/vs tiled modifiers

On 25/10/2023 13:39, Keith Zhao wrote:
> For each modifier, add the corresponding description
> 
> Signed-off-by: Keith Zhao <keith.zhao@...rfivetech.com>
> ---
>   include/uapi/drm/drm_fourcc.h | 57 +++++++++++++++++++++++++++++++++++
>   1 file changed, 57 insertions(+)
> 
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index 8db7fd3f7..a580a848c 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -419,6 +419,7 @@ extern "C" {
>   #define DRM_FORMAT_MOD_VENDOR_ARM     0x08
>   #define DRM_FORMAT_MOD_VENDOR_ALLWINNER 0x09
>   #define DRM_FORMAT_MOD_VENDOR_AMLOGIC 0x0a
> +#define DRM_FORMAT_MOD_VENDOR_VERISILICON 0x0b
>   
>   /* add more to the end as needed */
>   
> @@ -1562,6 +1563,62 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier)
>   #define AMD_FMT_MOD_CLEAR(field) \
>   	(~((__u64)AMD_FMT_MOD_##field##_MASK << AMD_FMT_MOD_##field##_SHIFT))
>   
> +#define DRM_FORMAT_MOD_VERISILICON_TYPE_NORMAL					0x00
> +#define DRM_FORMAT_MOD_VERISILICON_TYPE_MASK					((__u64)0x3 << 54)
> +
> +#define fourcc_mod_vs_code(type, val) \
> +	fourcc_mod_code(VERISILICON, ((((__u64)type) << 54) | (val)))

Please use fourcc_mode_code directly.

> +
> +#define DRM_FORMAT_MOD_VERISILICON_NORM_MODE_MASK				0x1F
> +
> +/*
> + * An x-major 8x8 super tile consists of 64 8x8 sub-tiles in total.
> + * Each 8x8 sub-tile consists of four standard tiles .
> + * standard tiles (see Vivante 4x4 tiling layout)
> + */
> +#define DRM_FORMAT_MOD_VERISILICON_SUPER_TILED_XMAJOR_8X8		0x02
> +
> +/*
> + * A y-major 8x8 super tile consists of 64 8x8 sub-tiles in total.
> + * Each 8x8 sub-tile consists of four standard tiles .
> + * standard tiles (see Vivante 4x4 tiling layout)
> + */
> +#define DRM_FORMAT_MOD_VERISILICON_SUPER_TILED_YMAJOR_8X8		0x03
> +
> +/*
> + * An 8x8 tile consists of four standard tiles
> + * that are organized in Z-order.
> + * standard tiles (see Vivante 4x4 tiling layout)
> + */
> +#define DRM_FORMAT_MOD_VERISILICON_TILE_8X8						0x04
> +
> +/*
> + * An 8x4 tile consists of two standard tiles
> + * that are organized in Z-order.
> + * standard tiles (see Vivante 4x4 tiling layout)
> + */
> +#define DRM_FORMAT_MOD_VERISILICON_TILE_8X4						0x07
> +
> +/*
> + * An x-major 8x4 super tile consists of 128 8x4 sub-tiles in total.
> + * Each 8x4 sub-tile consists of two standard tiles.
> + * two standard tiles also same with DRM_FORMAT_MOD_VS_TILE_8X4
> + * standard tiles (see Vivante 4x4 tiling layout)
> + */
> +#define DRM_FORMAT_MOD_VERISILICON_SUPER_TILED_XMAJOR_8X4		0x0B
> +
> +/*
> + * A y-major 4x8 super tile consists of 128 4x8 sub-tiles in total.
> + * Each 4x8 sub-tile consists of two standard tiles.
> + * two standard tiles also same with DRM_FORMAT_MOD_VS_TILE_8X4
> + * standard tiles (see Vivante 4x4 tiling layout)
> + */
> +#define DRM_FORMAT_MOD_VERISILICON_SUPER_TILED_YMAJOR_4X8    0x0C
> +
> +#define fourcc_mod_vs_norm_code(tile) \
> +	fourcc_mod_vs_code(DRM_FORMAT_MOD_VERISILICON_TYPE_NORMAL, \
> +				(tile))

1) this is not a part of uAPI
2) please use fourcc_mod_code directly.

> +
>   #if defined(__cplusplus)
>   }
>   #endif

-- 
With best wishes
Dmitry