[PATCH i-g-t 1/2] lib/intel_pat: account for Wa_16023588340

[Matthew Auld]

We can't use the CLOS3 entries on BMG g21.

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
---
 lib/intel_pat.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/intel_pat.c b/lib/intel_pat.c
index 041952bd8..9191b3577 100644
--- a/lib/intel_pat.c
+++ b/lib/intel_pat.c
@@ -24,7 +24,11 @@ static void intel_get_pat_idx(int fd, struct intel_pat_cache *pat)
 		pat->wt = 15; /* Compressed + WB-transient */
 		pat->wb = 2;
 		pat->uc_comp = 12; /* Compressed + UC, XE2 and later */
-		pat->max_index = 31;
+
+		if (intel_graphics_ver(dev_id) == IP_VER(20, 1))
+			pat->max_index = 27;
+		else
+			pat->max_index = 31;
 	} else if (IS_METEORLAKE(dev_id)) {
 		pat->uc = 2;
 		pat->wt = 1;
-- 
2.45.1