drm/i915/skl: drop workarounds for E0 revision

Pre-production hardware is not supported.
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/0633a02177195703502ef2396aab03efc0314334.1474034059.git.jani.nikula@intel.com

drivers/gpu/drm/i915/intel_lrc.c

@@ -845,13 +845,12 @@ static inline int gen8_emit_flush_coherentl3_wa(struct intel_engine_cs *engine,
 	uint32_t l3sqc4_flush = (0x40400000 | GEN8_LQSC_FLUSH_COHERENT_LINES);
 
 	/*
-	 * WaDisableLSQCROPERFforOCL:skl,kbl
+	 * WaDisableLSQCROPERFforOCL:kbl
 	 * This WA is implemented in skl_init_clock_gating() but since
 	 * this batch updates GEN8_L3SQCREG4 with default value we need to
 	 * set this bit here to retain the WA during flush.
 	 */
-	if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_E0) ||
-	    IS_KBL_REVID(dev_priv, 0, KBL_REVID_E0))
+	if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_E0))
 		l3sqc4_flush |= GEN8_LQSC_RO_PERF_DIS;
 
 	wa_ctx_emit(batch, index, (MI_STORE_REGISTER_MEM_GEN8 |

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -1003,20 +1003,6 @@ static int skl_init_workarounds(struct intel_engine_cs *engine)
 	I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1,
 		   _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL));
 
-	if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_E0)) {
-		/* WaDisableChickenBitTSGBarrierAckForFFSliceCS:skl */
-		I915_WRITE(FF_SLICE_CS_CHICKEN2,
-			   _MASKED_BIT_ENABLE(GEN9_TSG_BARRIER_ACK_DISABLE));
-	}
-
-	/* GEN8_L3SQCREG4 has a dependency with WA batch so any new changes
-	 * involving this register should also be added to WA batch as required.
-	 */
-	if (IS_SKL_REVID(dev_priv, 0, SKL_REVID_E0))
-		/* WaDisableLSQCROPERFforOCL:skl */
-		I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) |
-			   GEN8_LQSC_RO_PERF_DIS);
-
 	/* WaEnableGapsTsvCreditFix:skl */
 	I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) |
 				   GEN9_GAPS_TSV_CREDIT_DISABLE));