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drm/xe/xe2hpg: Remove extra allocation of CCS pages for dgfx

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On Xe2 dGPU, compression is only supported with VRAM. When copying from
VRAM -> system memory the KMD uses mapping with uncompressed PAT
so the copy in system memory is guaranteed to be uncompressed.
When restoring such buffers from system memory -> VRAM the KMD can't
easily know which pages were originally compressed, so we always use
uncompressed -> uncompressed here.
so this means that there's no need for extra CCS storage on such
platforms.

v2: More description added to commit message

Signed-off-by: Akshata Jahagirdar <akshata.jahagirdar@intel.com>
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408170545.3769566-8-balasubramani.vivekanandan@intel.com
This commit is contained in:
Akshata Jahagirdar
2024-04-08 22:35:41 +05:30
committed by Matt Roper
parent b5c2ca0372
commit e9c22984e9
1 changed files with 3 additions and 0 deletions
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drivers/gpu/drm/xe/xe_bo.c
+3
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@@ -2201,6 +2201,9 @@ bool xe_bo_needs_ccs_pages(struct xe_bo *bo)
{
struct xe_device *xe = xe_bo_device(bo);
if (GRAPHICS_VER(xe) >= 20 && IS_DGFX(xe))
return false;
if (!xe_device_has_flat_ccs(xe) || bo->ttm.type != ttm_bo_type_device)
return false;