drm/i915/perf: refactor perf setup

Gen8/9 aren't very different and we can merge some of this code.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110190845.32574-4-lionel.g.landwerlin@intel.com

drivers/gpu/drm/i915/i915_perf.c

@@ -3423,6 +3423,15 @@ void i915_perf_init(struct drm_i915_private *dev_priv)
 		 * worth the complexity to maintain now that BDW+ enable
 		 * execlist mode by default.
 		 */
+		dev_priv->perf.oa.oa_formats = gen8_plus_oa_formats;
+
+		dev_priv->perf.oa.ops.init_oa_buffer = gen8_init_oa_buffer;
+		dev_priv->perf.oa.ops.oa_enable = gen8_oa_enable;
+		dev_priv->perf.oa.ops.oa_disable = gen8_oa_disable;
+		dev_priv->perf.oa.ops.read = gen8_oa_read;
+		dev_priv->perf.oa.ops.oa_hw_tail_read = gen8_oa_hw_tail_read;
+
+		if (IS_GEN8(dev_priv) || IS_GEN9(dev_priv)) {
 			dev_priv->perf.oa.ops.is_valid_b_counter_reg =
 				gen7_is_valid_b_counter_addr;
 			dev_priv->perf.oa.ops.is_valid_mux_reg =
@@ -3430,34 +3439,30 @@ void i915_perf_init(struct drm_i915_private *dev_priv)
 			dev_priv->perf.oa.ops.is_valid_flex_reg =
 				gen8_is_valid_flex_addr;
 
-		dev_priv->perf.oa.ops.init_oa_buffer = gen8_init_oa_buffer;
+			if (IS_CHERRYVIEW(dev_priv)) {
+				dev_priv->perf.oa.ops.is_valid_mux_reg =
+					chv_is_valid_mux_addr;
+			}
+
 			dev_priv->perf.oa.ops.enable_metric_set = gen8_enable_metric_set;
 			dev_priv->perf.oa.ops.disable_metric_set = gen8_disable_metric_set;
-		dev_priv->perf.oa.ops.oa_enable = gen8_oa_enable;
-		dev_priv->perf.oa.ops.oa_disable = gen8_oa_disable;
-		dev_priv->perf.oa.ops.read = gen8_oa_read;
-		dev_priv->perf.oa.ops.oa_hw_tail_read = gen8_oa_hw_tail_read;
-
-		dev_priv->perf.oa.oa_formats = gen8_plus_oa_formats;
 
 			if (IS_GEN8(dev_priv)) {
 				dev_priv->perf.oa.ctx_oactxctrl_offset = 0x120;
 				dev_priv->perf.oa.ctx_flexeu0_offset = 0x2ce;
 
-			dev_priv->perf.oa.timestamp_frequency = 12500000;
-
 				dev_priv->perf.oa.gen8_valid_ctx_bit = (1<<25);
-			if (IS_CHERRYVIEW(dev_priv)) {
-				dev_priv->perf.oa.ops.is_valid_mux_reg =
-					chv_is_valid_mux_addr;
-			}
-		} else if (IS_GEN9(dev_priv)) {
+			} else {
 				dev_priv->perf.oa.ctx_oactxctrl_offset = 0x128;
 				dev_priv->perf.oa.ctx_flexeu0_offset = 0x3de;
 
 				dev_priv->perf.oa.gen8_valid_ctx_bit = (1<<16);
+			}
 
 			switch (dev_priv->info.platform) {
+			case INTEL_BROADWELL:
+				dev_priv->perf.oa.timestamp_frequency = 12500000;
+				break;
 			case INTEL_BROXTON:
 			case INTEL_GEMINILAKE:
 				dev_priv->perf.oa.timestamp_frequency = 19200000;
@@ -3468,9 +3473,6 @@ void i915_perf_init(struct drm_i915_private *dev_priv)
 				dev_priv->perf.oa.timestamp_frequency = 12000000;
 				break;
 			default:
-				/* Leave timestamp_frequency to 0 so we can
-				 * detect unsupported platforms.
-				 */
 				break;
 			}
 		}