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drm/xe: Fix MOCS debugfs LNCF readout

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With only XE_FW_GT taken LNCF registers read back as all zeroes, leading
to a wild goose chase trying to figure out why is register programming
incorrect.

Fix it by grabbing XE_FORCEWAKE_ALL for affected platforms.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250307111402.26577-2-tvrtko.ursulin@igalia.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 1182bc74b3)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
This commit is contained in:
Tvrtko Ursulin 2025-03-07 11:13:59 +00:00 committed by Lucas De Marchi
parent cedf23842d
commit 298661cd9c
1 changed files with 3 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/gpu/drm/xe/xe_mocs.c
View file

@ -781,7 +781,9 @@ void xe_mocs_dump(struct xe_gt *gt, struct drm_printer *p)
flags = get_mocs_settings(xe, &table);
xe_pm_runtime_get_noresume(xe);
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
fw_ref = xe_force_wake_get(gt_to_fw(gt),
flags & HAS_LNCF_MOCS ?
XE_FORCEWAKE_ALL : XE_FW_GT);
if (!fw_ref)
goto err_fw;