From: Akshata Jahagirdar <akshata.jahagirdar@intel.com> 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> --- drivers/gpu/drm/xe/xe_bo.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c index 6166bc715656..fdeb3691d3f6 100644 --- a/drivers/gpu/drm/xe/xe_bo.c +++ b/drivers/gpu/drm/xe/xe_bo.c @@ -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; +
LGTM.
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
if (!xe_device_has_flat_ccs(xe) || bo->ttm.type != ttm_bo_type_device) return false;