Re: [PATCH 1/2] drm/amd/display: Update modifier list for gfx10_3

[Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>]

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On Thu, Apr 15, 2021 at 1:35 AM Qingqing Zhuo <qingqing.zhuo@amd.com> wrote:

> [Why]
> Current list only includes modifiers where DCC_MAX_COMPRESSED_BLOCK
> is set to AMD_FMT_MOD_DCC_BLOCK_128B, while AMD_FMT_MOD_DCC_BLOCK_64B
> is also supported and used by userspace.
>
> [How]
> Add AMD_FMT_MOD_DCC_BLOCK_64B to modifiers with DCC supported.
>
> Signed-off-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
> ---
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 23 +++++++++++++++++++
>  1 file changed, 23 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index e29cb2e956db..c3cbc3d298e7 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -4535,6 +4535,17 @@ add_gfx10_3_modifiers(const struct amdgpu_device
> *adev,
>         int pipe_xor_bits =
> ilog2(adev->gfx.config.gb_addr_config_fields.num_pipes);
>         int pkrs = ilog2(adev->gfx.config.gb_addr_config_fields.num_pkrs);
>
> +       add_modifier(mods, size, capacity, AMD_FMT_MOD |
> +                   AMD_FMT_MOD_SET(TILE, AMD_FMT_MOD_TILE_GFX9_64K_R_X) |
> +                   AMD_FMT_MOD_SET(TILE_VERSION,
> AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS) |
> +                   AMD_FMT_MOD_SET(PIPE_XOR_BITS, pipe_xor_bits) |
> +                   AMD_FMT_MOD_SET(PACKERS, pkrs) |
> +                   AMD_FMT_MOD_SET(DCC, 1) |
> +                   AMD_FMT_MOD_SET(DCC_CONSTANT_ENCODE, 1) |
> +                   AMD_FMT_MOD_SET(DCC_INDEPENDENT_64B, 1) |
> +                   AMD_FMT_MOD_SET(DCC_INDEPENDENT_128B, 1) |
> +                   AMD_FMT_MOD_SET(DCC_MAX_COMPRESSED_BLOCK,
> AMD_FMT_MOD_DCC_BLOCK_64B));
>

Thanks for finding this issue. Looking at it it looks to me like the
original entries are mistaken. Can we just change the
DCC_MAX_COMPRESSED_BLOCK in the already existing DCC entries? Looks like
Mesa always uses the AMD_FMT_MOD_DCC_BLOCK_64B anyway, and I don't think
DCC_INDEPENDENT_64B=1 + DCC_MAX_COMPRESSED_BLOCK=AMD_FMT_MOD_DCC_BLOCK_128B
makes sense.

+
>         add_modifier(mods, size, capacity, AMD_FMT_MOD |
>                     AMD_FMT_MOD_SET(TILE, AMD_FMT_MOD_TILE_GFX9_64K_R_X) |
>                     AMD_FMT_MOD_SET(TILE_VERSION,
> AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS) |
> @@ -4546,6 +4557,18 @@ add_gfx10_3_modifiers(const struct amdgpu_device
> *adev,
>                     AMD_FMT_MOD_SET(DCC_INDEPENDENT_128B, 1) |
>                     AMD_FMT_MOD_SET(DCC_MAX_COMPRESSED_BLOCK,
> AMD_FMT_MOD_DCC_BLOCK_128B));
>
> +       add_modifier(mods, size, capacity, AMD_FMT_MOD |
> +                   AMD_FMT_MOD_SET(TILE, AMD_FMT_MOD_TILE_GFX9_64K_R_X) |
> +                   AMD_FMT_MOD_SET(TILE_VERSION,
> AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS) |
> +                   AMD_FMT_MOD_SET(PIPE_XOR_BITS, pipe_xor_bits) |
> +                   AMD_FMT_MOD_SET(PACKERS, pkrs) |
> +                   AMD_FMT_MOD_SET(DCC, 1) |
> +                   AMD_FMT_MOD_SET(DCC_RETILE, 1) |
> +                   AMD_FMT_MOD_SET(DCC_CONSTANT_ENCODE, 1) |
> +                   AMD_FMT_MOD_SET(DCC_INDEPENDENT_64B, 1) |
> +                   AMD_FMT_MOD_SET(DCC_INDEPENDENT_128B, 1) |
> +                   AMD_FMT_MOD_SET(DCC_MAX_COMPRESSED_BLOCK,
> AMD_FMT_MOD_DCC_BLOCK_64B));
> +
>         add_modifier(mods, size, capacity, AMD_FMT_MOD |
>                     AMD_FMT_MOD_SET(TILE, AMD_FMT_MOD_TILE_GFX9_64K_R_X) |
>                     AMD_FMT_MOD_SET(TILE_VERSION,
> AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS) |
> --
> 2.17.1
>
>

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