[PATCH] drm/amd/display: ignore modifiers when checking for format support

[Marek Olšák]

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Thu, Jun 9, 2022 at 10:27 AM Aurabindo Pillai <aurabindo.pillai at amd.com>
wrote:

> [Why&How]
> There are cases where swizzle modes are set but modifiers arent. For
> such a userspace, we need not check modifiers while checking
> compatibilty in the drm hook for checking plane format.
>
> Ignore checking modifiers but check the DCN generation for the
> supported swizzle mode.
>
> Signed-off-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
> ---
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 51 +++++++++++++++++--
>  1 file changed, 46 insertions(+), 5 deletions(-)
>
> 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 2023baf41b7e..1322df491736 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -4938,6 +4938,7 @@ static bool dm_plane_format_mod_supported(struct
> drm_plane *plane,
>  {
>         struct amdgpu_device *adev = drm_to_adev(plane->dev);
>         const struct drm_format_info *info = drm_format_info(format);
> +       struct hw_asic_id asic_id = adev->dm.dc->ctx->asic_id;
>         int i;
>
>         enum dm_micro_swizzle microtile =
> modifier_gfx9_swizzle_mode(modifier) & 3;
> @@ -4955,13 +4956,53 @@ static bool dm_plane_format_mod_supported(struct
> drm_plane *plane,
>                 return true;
>         }
>
> -       /* Check that the modifier is on the list of the plane's supported
> modifiers. */
> -       for (i = 0; i < plane->modifier_count; i++) {
> -               if (modifier == plane->modifiers[i])
> +       /* check if swizzle mode is supported by this version of DCN */
> +       switch (asic_id.chip_family) {
> +               case FAMILY_SI:
> +               case FAMILY_CI:
> +               case FAMILY_KV:
> +               case FAMILY_CZ:
> +               case FAMILY_VI:
> +                       /* AI and earlier asics does not have modifier
> support */
> +                       return false;
> +                       break;
> +               case FAMILY_AI:
> +               case FAMILY_RV:
> +               case FAMILY_NV:
> +               case FAMILY_VGH:
> +               case FAMILY_YELLOW_CARP:
> +               case AMDGPU_FAMILY_GC_10_3_6:
> +               case AMDGPU_FAMILY_GC_10_3_7:
> +                       switch (AMD_FMT_MOD_GET(TILE, modifier)) {
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_R_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_D_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_S_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_D:
> +                                       return true;
> +                                       break;
> +                               default:
> +                                       return false;
> +                                       break;
> +                       }
> +                       break;
> +               case AMDGPU_FAMILY_GC_11_0_0:
> +                       switch (AMD_FMT_MOD_GET(TILE, modifier)) {
> +                               case AMD_FMT_MOD_TILE_GFX11_256K_R_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_R_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_D_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_S_X:
> +                               case AMD_FMT_MOD_TILE_GFX9_64K_D:
> +                                       return true;
> +                                       break;
> +                               default:
> +                                       return false;
> +                                       break;
> +                       }
> +                       break;
> +               default:
> +                       ASSERT(0); /* Unknown asic */
>                         break;
>         }
> -       if (i == plane->modifier_count)
> -               return false;
>
>         /*
>          * For D swizzle the canonical modifier depends on the bpp, so
> check
> --
> 2.36.1
>
>
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