Disable Clock gating in EU when gathering the events so that EU events
are not lost.
v2: Fix checkpatch issues
v3: User MCR helpers to write to MC reg
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 +
drivers/gpu/drm/i915/i915_perf.c | 24 ++++++++++++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 36d95b79022c..b101e31df61c 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -1164,6 +1164,7 @@
#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 MCR_REG(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 585079ae5f03..18619eb19769 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -204,6 +204,7 @@
#include "gt/intel_gpu_commands.h"
#include "gt/intel_gt.h"
#include "gt/intel_gt_clock_utils.h"
+#include "gt/intel_gt_mcr.h"
#include "gt/intel_gt_regs.h"
#include "gt/intel_lrc.h"
#include "gt/intel_lrc_reg.h"
@@ -2775,6 +2776,18 @@ 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_gt_mcr_multicast_write(uncore->gt, 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 |
@@ -2853,6 +2866,17 @@ 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_gt_mcr_multicast_write(uncore->gt, 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
