[PATCH] drm/xe: Upgrade complaint about missing slice info

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

The steering code needs to know slice/subslice counts and this
information should be retrieved from the hwconfig table. However,
earlier platforms don't have it, hence the KMD has a fallback path.
Newer platforms really should have the entries and if they are missing
that is a bug that needs to be fixed in the table.

So update the complaint to be an error on newer platforms and remove
it completely for older ones that we know are bad (but are not POR for
the Xe driver anyway). Also, re-word the message a little to make it
clearer what the issue is.

Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
---
 drivers/gpu/drm/xe/xe_gt_mcr.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_gt_mcr.c b/drivers/gpu/drm/xe/xe_gt_mcr.c
index a1676b787fdc..605aad3554e7 100644
--- a/drivers/gpu/drm/xe/xe_gt_mcr.c
+++ b/drivers/gpu/drm/xe/xe_gt_mcr.c
@@ -341,7 +341,13 @@ static unsigned int dss_per_group(struct xe_gt *gt)
 	return DIV_ROUND_UP(max_subslices, max_slices);
 
 fallback:
-	xe_gt_dbg(gt, "GuC hwconfig cannot provide dss/slice; using typical fallback values\n");
+	/*
+	 * Some older platforms don't have tables or don't have complete tables.
+	 * Newer platforms should always have the required info.
+	 */
+	if (GRAPHICS_VERx100(gt_to_xe(gt)) >= 2000)
+		xe_gt_err(gt, "Slice/Subslice counts missing from hwconfig table; using typical fallback values\n");
+
 	if (gt_to_xe(gt)->info.platform == XE_PVC)
 		return 8;
 	else if (GRAPHICS_VERx100(gt_to_xe(gt)) >= 1250)
-- 
2.47.0