Commit e9c22984 authored by Akshata Jahagirdar's avatar Akshata Jahagirdar Committed by Matt Roper
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drm/xe/xe2hpg: Remove extra allocation of CCS pages for dgfx 



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: default avatarAkshata Jahagirdar <akshata.jahagirdar@intel.com>
Signed-off-by: default avatarBalasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: default avatarHimal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408170545.3769566-8-balasubramani.vivekanandan@intel.com
parent b5c2ca03

drivers/gpu/drm/xe/xe_bo.c

+3 −0
Original line number Diff line number Diff line
@@ -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;