[Intel-gfx] [PATCH 06/22] drm/i915/icl: WaDisableImprovedTdlClkGating

[Oscar Mateo]

Revert to the legacy implementation.

v2: GEN7_ROW_CHICKEN2 is masked
v3:
  - Rebased
  - Renamed to Wa_2006611047
  - A0 and B0 only
v4:
  - Add spaces around '<<' (and fix the surrounding code as well)
  - Mark the WA as pre-prod

Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h        | 5 +++--
 drivers/gpu/drm/i915/intel_engine_cs.c | 7 +++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 699135b..67664d0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8249,8 +8249,9 @@ enum {
 
 #define GEN7_ROW_CHICKEN2		_MMIO(0xe4f4)
 #define GEN7_ROW_CHICKEN2_GT2		_MMIO(0xf4f4)
-#define   DOP_CLOCK_GATING_DISABLE	(1<<0)
-#define   PUSH_CONSTANT_DEREF_DISABLE	(1<<8)
+#define   DOP_CLOCK_GATING_DISABLE	(1 << 0)
+#define   PUSH_CONSTANT_DEREF_DISABLE	(1 << 8)
+#define   GEN11_TDL_CLOCK_GATING_FIX_DISABLE	(1 << 1)
 
 #define HSW_ROW_CHICKEN3		_MMIO(0xe49c)
 #define  HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE    (1 << 6)
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index ba8c137..eb2f46e 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1487,6 +1487,13 @@ static int icl_init_workarounds(struct intel_engine_cs *engine)
 	 */
 	WA_SET_BIT_MASKED(ICL_HDC_CHICKEN0, HDC_FORCE_NON_COHERENT);
 
+	/* Wa_2006611047:icl (pre-prod)
+	 * Formerly known as WaDisableImprovedTdlClkGating
+	 */
+	if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_B0))
+		WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
+				  GEN11_TDL_CLOCK_GATING_FIX_DISABLE);
+
 	return 0;
 }
 
-- 
1.9.1