drm/i915/icl: Drop workarounds that only apply to pre-production steppings

We're past the point at which we usually drop workarounds that were
never needed on production hardware.  The driver will already print an
error and apply taint if loaded on pre-production hardware.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210713193635.3390052-13-matthew.d.roper@intel.com

drivers/gpu/drm/i915/gt/intel_workarounds.c

@@ -517,21 +517,12 @@ static void cfl_ctx_workarounds_init(struct intel_engine_cs *engine,
 static void icl_ctx_workarounds_init(struct intel_engine_cs *engine,
 				     struct i915_wa_list *wal)
 {
-	struct drm_i915_private *i915 = engine->i915;
-
 	/* WaDisableBankHangMode:icl */
 	wa_write(wal,
 		 GEN8_L3CNTLREG,
 		 intel_uncore_read(engine->uncore, GEN8_L3CNTLREG) |
 		 GEN8_ERRDETBCTRL);
 
-	/* Wa_1604370585:icl (pre-prod)
-	 * Formerly known as WaPushConstantDereferenceHoldDisable
-	 */
-	if (IS_ICL_GT_STEP(i915, STEP_A0, STEP_B0))
-		wa_masked_en(wal, GEN7_ROW_CHICKEN2,
-			     PUSH_CONSTANT_DEREF_DISABLE);
-
 	/* WaForceEnableNonCoherent:icl
 	 * This is not the same workaround as in early Gen9 platforms, where
 	 * lacking this could cause system hangs, but coherency performance
@@ -541,18 +532,6 @@ static void icl_ctx_workarounds_init(struct intel_engine_cs *engine,
 	 */
 	wa_masked_en(wal, ICL_HDC_MODE, HDC_FORCE_NON_COHERENT);
 
-	/* Wa_2006611047:icl (pre-prod)
-	 * Formerly known as WaDisableImprovedTdlClkGating
-	 */
-	if (IS_ICL_GT_STEP(i915, STEP_A0, STEP_A0))
-		wa_masked_en(wal, GEN7_ROW_CHICKEN2,
-			     GEN11_TDL_CLOCK_GATING_FIX_DISABLE);
-
-	/* Wa_2006665173:icl (pre-prod) */
-	if (IS_ICL_GT_STEP(i915, STEP_A0, STEP_A0))
-		wa_masked_en(wal, GEN11_COMMON_SLICE_CHICKEN3,
-			     GEN11_BLEND_EMB_FIX_DISABLE_IN_RCC);
-
 	/* WaEnableFloatBlendOptimization:icl */
 	wa_write_clr_set(wal,
 			 GEN10_CACHE_MODE_SS,
@@ -1015,18 +994,6 @@ icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
 		    GEN8_GAMW_ECO_DEV_RW_IA,
 		    GAMW_ECO_DEV_CTX_RELOAD_DISABLE);
 
-	/* Wa_1405779004:icl (pre-prod) */
-	if (IS_ICL_GT_STEP(i915, STEP_A0, STEP_A0))
-		wa_write_or(wal,
-			    SLICE_UNIT_LEVEL_CLKGATE,
-			    MSCUNIT_CLKGATE_DIS);
-
-	/* Wa_1406838659:icl (pre-prod) */
-	if (IS_ICL_GT_STEP(i915, STEP_A0, STEP_B0))
-		wa_write_or(wal,
-			    INF_UNIT_LEVEL_CLKGATE,
-			    CGPSF_CLKGATE_DIS);
-
 	/* Wa_1406463099:icl
 	 * Formerly known as WaGamTlbPendError
 	 */
@@ -1686,12 +1653,6 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 			    PMFLUSH_GAPL3UNBLOCK |
 			    PMFLUSHDONE_LNEBLK);
 
-		/* Wa_1406609255:icl (pre-prod) */
-		if (IS_ICL_GT_STEP(i915, STEP_A0, STEP_B0))
-			wa_write_or(wal,
-				    GEN7_SARCHKMD,
-				    GEN7_DISABLE_DEMAND_PREFETCH);
-
 		/* Wa_1606682166:icl */
 		wa_write_or(wal,
 			    GEN7_SARCHKMD,

drivers/gpu/drm/i915/i915_drv.h

@@ -1454,9 +1454,6 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 #define IS_KBL_DISPLAY_STEP(dev_priv, since, until) \
 	(IS_KABYLAKE(dev_priv) && IS_DISPLAY_STEP(dev_priv, since, until))
 
-#define IS_ICL_GT_STEP(p, since, until) \
-	(IS_ICELAKE(p) && IS_GT_STEP(p, since, until))
-
 #define IS_JSL_EHL_GT_STEP(p, since, until) \
 	(IS_JSL_EHL(p) && IS_GT_STEP(p, since, until))
 #define IS_JSL_EHL_DISPLAY_STEP(p, since, until) \