drm/i915: Remove cnl pre-prod workarounds

Remove all the stepping dependent cnl workarounds. Bspec lists
more steppings than this so presumably these are classed as
pre-production. And this is cnl after all so no one should
really care anyway.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200430125822.21985-2-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/gt/intel_rc6.c

@@ -113,7 +113,6 @@ static void gen9_rc6_enable(struct intel_rc6 *rc6)
 	struct intel_uncore *uncore = rc6_to_uncore(rc6);
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
-	u32 rc6_mode;
 
 	/* 2b: Program RC6 thresholds.*/
 	if (INTEL_GEN(rc6_to_i915(rc6)) >= 10) {
@@ -165,16 +164,11 @@ static void gen9_rc6_enable(struct intel_rc6 *rc6)
 	/* 3a: Enable RC6 */
 	set(uncore, GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
 
-	/* WaRsUseTimeoutMode:cnl (pre-prod) */
-	if (IS_CNL_REVID(rc6_to_i915(rc6), CNL_REVID_A0, CNL_REVID_C0))
-		rc6_mode = GEN7_RC_CTL_TO_MODE;
-	else
-		rc6_mode = GEN6_RC_CTL_EI_MODE(1);
 
 	rc6->ctl_enable =
 		GEN6_RC_CTL_HW_ENABLE |
 		GEN6_RC_CTL_RC6_ENABLE |
-		rc6_mode;
+		GEN6_RC_CTL_EI_MODE(1);
 
 	/*
 	 * WaRsDisableCoarsePowerGating:skl,cnl

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

@@ -485,25 +485,14 @@ static void cfl_ctx_workarounds_init(struct intel_engine_cs *engine,
 static void cnl_ctx_workarounds_init(struct intel_engine_cs *engine,
 				     struct i915_wa_list *wal)
 {
-	struct drm_i915_private *i915 = engine->i915;
-
 	/* WaForceContextSaveRestoreNonCoherent:cnl */
 	WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0,
 			  HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT);
 
-	/* WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod) */
-	if (IS_CNL_REVID(i915, CNL_REVID_B0, CNL_REVID_B0))
-		WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, THROTTLE_12_5);
-
 	/* WaDisableReplayBufferBankArbitrationOptimization:cnl */
 	WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
 			  GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
 
-	/* WaDisableEnhancedSBEVertexCaching:cnl (pre-prod) */
-	if (IS_CNL_REVID(i915, 0, CNL_REVID_B0))
-		WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
-				  GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE);
-
 	/* WaPushConstantDereferenceHoldDisable:cnl */
 	WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
 
@@ -872,12 +861,6 @@ cnl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
 {
 	wa_init_mcr(i915, wal);
 
-	/* WaDisableI2mCycleOnWRPort:cnl (pre-prod) */
-	if (IS_CNL_REVID(i915, CNL_REVID_B0, CNL_REVID_B0))
-		wa_write_or(wal,
-			    GAMT_CHKN_BIT_REG,
-			    GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT);
-
 	/* WaInPlaceDecompressionHang:cnl */
 	wa_write_or(wal,
 		    GEN9_GAMT_ECO_REG_RW_IA,

drivers/gpu/drm/i915/intel_pm.c

@@ -5255,10 +5255,6 @@ static void skl_compute_transition_wm(const struct intel_crtc_state *crtc_state,
 				trans_offset_b;
 	} else {
 		res_blocks = wm0_sel_res_b + trans_offset_b;
-
-		/* WA BUG:1938466 add one block for non y-tile planes */
-		if (IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_A0))
-			res_blocks += 1;
 	}
 
 	/*
@@ -6978,9 +6974,6 @@ static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
 	val = I915_READ(SLICE_UNIT_LEVEL_CLKGATE);
 	/* ReadHitWriteOnlyDisable:cnl */
 	val |= RCCUNIT_CLKGATE_DIS;
-	/* WaSarbUnitClockGatingDisable:cnl (pre-prod) */
-	if (IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_B0))
-		val |= SARBUNIT_CLKGATE_DIS;
 	I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE, val);
 
 	/* Wa_2201832410:cnl */

drivers/gpu/drm/i915/intel_wopcm.c

@@ -149,8 +149,7 @@ static bool check_hw_restrictions(struct drm_i915_private *i915,
 						     guc_wopcm_size))
 		return false;
 
-	if ((IS_GEN(i915, 9) ||
-	     IS_CNL_REVID(i915, CNL_REVID_A0, CNL_REVID_A0)) &&
+	if (IS_GEN(i915, 9) &&
 	    !gen9_check_huc_fw_fits(i915, guc_wopcm_size, huc_fw_size))
 		return false;