[Intel-gfx] [PATCH 15/19] drm/i915/perf: Add Wa_1508761755:dg2

[Umesh Nerlige Ramappa]

Disable Clock gating in EU when gathering the events so that EU events
are not lost.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt_regs.h |  1 +
 drivers/gpu/drm/i915/i915_perf.c        | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 94f9ddcfb3a5..28ef74f948e2 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -1129,6 +1129,7 @@
 #define   GEN12_DISABLE_EARLY_READ		REG_BIT(14)
 #define   GEN12_ENABLE_LARGE_GRF_MODE		REG_BIT(12)
 #define   GEN12_PUSH_CONST_DEREF_HOLD_DIS	REG_BIT(8)
+#define   GEN12_DISABLE_DOP_GATING              REG_BIT(0)
 
 #define RT_CTRL					_MMIO(0xe530)
 #define   DIS_NULL_QUERY			REG_BIT(10)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index a858ce57e465..efdd16edf8f3 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -2847,6 +2847,18 @@ gen12_enable_metric_set(struct i915_perf_stream *stream,
 	u32 sqcnt1;
 	int ret;
 
+ 	/*
+	 * Wa_1508761755:xehpsdv, dg2
+ 	 * EU NOA signals behave incorrectly if EU clock gating is enabled.
+ 	 * Disable thread stall DOP gating and EU DOP gating.
+ 	 */
+	if (IS_XEHPSDV(i915) || IS_DG2(i915)) {
+		intel_uncore_write(uncore, GEN8_ROW_CHICKEN,
+				_MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE));
+		intel_uncore_write(uncore, GEN7_ROW_CHICKEN2,
+				_MASKED_BIT_ENABLE(GEN12_DISABLE_DOP_GATING));
+	}
+
 	intel_uncore_write(uncore, GEN12_OAG_OA_DEBUG,
 			   /* Disable clk ratio reports, like previous Gens. */
 			   _MASKED_BIT_ENABLE(GEN12_OAG_OA_DEBUG_DISABLE_CLK_RATIO_REPORTS |
@@ -2925,6 +2937,17 @@ static void gen12_disable_metric_set(struct i915_perf_stream *stream)
 	struct drm_i915_private *i915 = stream->perf->i915;
 	u32 sqcnt1;
 
+	/*
+	 * Wa_1508761755:xehpsdv, dg2
+	 * Enable thread stall DOP gating and EU DOP gating.
+	 */
+	if (IS_XEHPSDV(i915) || IS_DG2(i915)) {
+		intel_uncore_write(uncore, GEN8_ROW_CHICKEN,
+				_MASKED_BIT_DISABLE(STALL_DOP_GATING_DISABLE));
+		intel_uncore_write(uncore, GEN7_ROW_CHICKEN2,
+				_MASKED_BIT_DISABLE(GEN12_DISABLE_DOP_GATING));
+	}
+
 	/* Reset all contexts' slices/subslices configurations. */
 	gen12_configure_all_contexts(stream, NULL, NULL);
 
-- 
2.25.1