drm/i915/gt: Move ilk GT workarounds from init_clock_gating to workarounds

Rescue the GT workarounds from being buried inside init_clock_gating so
that we remember to apply them after a GT reset, and that they are
included in our verification that the workarounds are applied.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20200611080140.30228-5-chris@chris-wilson.co.uk

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

@@ -714,6 +714,18 @@ int intel_engine_emit_ctx_wa(struct i915_request *rq)
 	return 0;
 }
 
+static void
+ilk_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
+{
+	wa_masked_en(wal, _3D_CHICKEN2, _3D_CHICKEN2_WM_READ_PIPELINED);
+
+	/* WaDisableRenderCachePipelinedFlush:ilk */
+	wa_masked_en(wal, CACHE_MODE_0, CM0_PIPELINED_RENDER_FLUSH_DISABLE);
+
+	/* WaDisable_RenderCache_OperationalFlush:ilk */
+	wa_masked_dis(wal, CACHE_MODE_0, RC_OP_FLUSH_ENABLE);
+}
+
 static void
 snb_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
 {
@@ -1195,6 +1207,8 @@ gt_init_workarounds(struct drm_i915_private *i915, struct i915_wa_list *wal)
 		ivb_gt_workarounds_init(i915, wal);
 	else if (IS_GEN(i915, 6))
 		snb_gt_workarounds_init(i915, wal);
+	else if (IS_GEN(i915, 5))
+		ilk_gt_workarounds_init(i915, wal);
 	else if (INTEL_GEN(i915) <= 8)
 		return;
 	else

drivers/gpu/drm/i915/intel_pm.c

@@ -6921,16 +6921,6 @@ static void ilk_init_clock_gating(struct drm_i915_private *dev_priv)
 	I915_WRITE(ILK_DISPLAY_CHICKEN2,
 		   I915_READ(ILK_DISPLAY_CHICKEN2) |
 		   ILK_ELPIN_409_SELECT);
-	I915_WRITE(_3D_CHICKEN2,
-		   _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
-		   _3D_CHICKEN2_WM_READ_PIPELINED);
-
-	/* WaDisableRenderCachePipelinedFlush:ilk */
-	I915_WRITE(CACHE_MODE_0,
-		   _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
-
-	/* WaDisable_RenderCache_OperationalFlush:ilk */
-	I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
 
 	g4x_disable_trickle_feed(dev_priv);