From 7f0cc34b5349cfb2867358737b3338cb2fcbc354 Mon Sep 17 00:00:00 2001
From: Michel Thierry <michel.thierry@intel.com>
Date: Thu, 25 Jul 2019 17:02:26 -0700
Subject: drm/i915/tgl: Implement Wa_1406941453
Git-commit: 7f0cc34b5349cfb2867358737b3338cb2fcbc354
Patch-mainline: v5.5-rc1
References: bsc#1152489
Enable Small PL for power benefit.
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190713010940.17711-18-lucas.demarchi@intel.com
Link: https://patchwork.freedesktop.org/patch/msgid/20190726000226.26914-4-lucas.demarchi@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 7 +++++++
drivers/gpu/drm/i915/i915_reg.h | 3 +++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index ba65e5018978..25ae60846398 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1260,6 +1260,13 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
{
struct drm_i915_private *i915 = engine->i915;
+ if (IS_GEN(i915, 12)) {
+ /* Wa_1406941453:tgl */
+ wa_masked_en(wal,
+ SAMPLER_MODE,
+ SAMPLER_ENABLE_SMALL_PL);
+ }
+
if (IS_GEN(i915, 11)) {
/* This is not an Wa. Enable for better image quality */
wa_masked_en(wal,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f8f52ae6cc6f..5e3a6178aff4 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8965,6 +8965,9 @@ enum {
#define GEN9_DG_MIRROR_FIX_ENABLE (1 << 5)
#define GEN9_CCS_TLB_PREFETCH_ENABLE (1 << 3)
+#define SAMPLER_MODE _MMIO(0xe18c)
+#define SAMPLER_ENABLE_SMALL_PL (1 << 15)
+
#define GEN8_ROW_CHICKEN _MMIO(0xe4f0)
#define FLOW_CONTROL_ENABLE (1 << 15)
#define PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE (1 << 8)
--
2.28.0