[PATCH v2] tests/intel/xe_oa: Wa_14026633728

[Shekhar Chauhan <shekhar.chauhan@intel.com>]

For MERTOA in CRI, oa buffer can be in device memory. Because of slower
device mem access, OA exponent values lower than 8 can result in buffer
overflows. Bump the OA exponent value.

v2: Fix commit title, description and code description.

Signed-off-by: Shekhar Chauhan <shekhar.chauhan@intel.com>
---
 tests/intel/xe_oa.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/intel/xe_oa.c b/tests/intel/xe_oa.c
index 988c46df6..cbc1e0d3e 100644
--- a/tests/intel/xe_oa.c
+++ b/tests/intel/xe_oa.c
@@ -2645,6 +2645,16 @@ test_non_zero_reason(const struct drm_xe_oa_unit *oau, size_t oa_buffer_size)
 {
 	/* ~20 micro second period */
 	int oa_exponent = max_oa_exponent_for_period_lte(20000);
+
+	/*
+	 * Wa_14026633728: For MERTOA in CRI, oa buffer can be in device memory.
+	 * Because of slower device mem access, OA exponent values lower than 8 can
+	 * result in buffer overflows.
+	 */
+
+	if (oau->oa_unit_type == DRM_XE_OA_UNIT_TYPE_MERT && IS_CRESCENTISLAND(devid))
+		oa_exponent = max(oa_exponent, 8);
+
 	struct intel_xe_perf_metric_set *test_set = oa_unit_metric_set(oau);
 	uint64_t fmt = test_set->perf_oa_format;
 	size_t report_size = get_oa_format(fmt).size;
-- 
2.53.0