From b83a309a9889225ca5acf75897ec35a9bc33cdaf Mon Sep 17 00:00:00 2001
From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Date: Wed, 17 Jul 2019 19:06:24 +0100
Subject: drm/i915/icl: Add Wa_1409178092
Git-commit: b83a309a9889225ca5acf75897ec35a9bc33cdaf
Patch-mainline: v5.4-rc1
References: bsc#1152489
We were missing this workaround which can cause hangs if fine grained
coherency was used.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190717180624.20354-7-tvrtko.ursulin@linux.intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 6 ++++++
drivers/gpu/drm/i915/i915_reg.h | 3 +++
2 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index ff532ff5d574..704ace01e7f5 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1297,6 +1297,12 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
wa_write_or(wal,
GEN7_SARCHKMD,
GEN7_DISABLE_SAMPLER_PREFETCH);
+
+ /* Wa_1409178092:icl */
+ wa_write_masked_or(wal,
+ GEN11_SCRATCH2,
+ GEN11_COHERENT_PARTIAL_WRITE_MERGE_ENABLE,
+ 0);
}
if (IS_GEN_RANGE(i915, 9, 11)) {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index fdd9bc01e694..24f2a52a2b42 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7721,6 +7721,9 @@ enum {
#define GEN7_L3SQCREG4 _MMIO(0xb034)
#define L3SQ_URB_READ_CAM_MATCH_DISABLE (1 << 27)
+#define GEN11_SCRATCH2 _MMIO(0xb140)
+#define GEN11_COHERENT_PARTIAL_WRITE_MERGE_ENABLE (1 << 19)
+
#define GEN8_L3SQCREG4 _MMIO(0xb118)
#define GEN11_LQSC_CLEAN_EVICT_DISABLE (1 << 6)
#define GEN8_LQSC_RO_PERF_DIS (1 << 27)
--
2.28.0