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drm/xe/pat: Default XE_CACHE_NONE_COMPRESSION to invalid

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Initialize XE_CACHE_NONE_COMPRESSION PAT index to XE_PAT_INVALID_IDX by
default, same as XE_CACHE_WB_COMPRESSION. Platforms that support this
cache mode will override it in xe_pat_init_early(). This ensures that
accidental use on unsupported platforms can be detected.

A subsequent patch introduces a helper to assert on invalid PAT index
access at all call sites.

Suggested-by: Matthew Auld <matthew.auld@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Xin Wang <x.wang@intel.com>
Link: https://patch.msgid.link/20260416045526.536497-3-x.wang@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
This commit is contained in:
Xin Wang 2026-04-15 21:55:25 -07:00 committed by Matt Roper
parent 5f01da0687
commit 369738a43a
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/xe/xe_pat.c
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@ -559,6 +559,7 @@ static const struct xe_pat_ops xe3p_xpc_pat_ops = {
void xe_pat_init_early(struct xe_device *xe)
{
xe->pat.idx[XE_CACHE_WB_COMPRESSION] = XE_PAT_INVALID_IDX;
xe->pat.idx[XE_CACHE_NONE_COMPRESSION] = XE_PAT_INVALID_IDX;
if (GRAPHICS_VERx100(xe) == 3511) {
xe->pat.ops = &xe3p_xpc_pat_ops;
xe->pat.table = xe3p_xpc_pat_table;