[Intel-gfx] [PATCH v4 1/2] drm/i915/mtl: Add MTL performance tuning changes

[Radhakrishna Sripada]

MTL reuses the tuning parameters for DG2. Extend the dg2
performance tuning parameters to MTL.

v2: Add DRAW_WATERMARK tuning parameter.
v3: Limit DRAW_WATERMARK tuning to non A0 step.
v4: Reorder platform checks.
    Restrict Blend fill caching optimization to Render GT.

Bspec: 68331
Cc: Haridhar Kalvala <haridhar.kalvala at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Gustavo Sousa <gustavo.sousa at intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 786349e95487..b6d3185cf868 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -817,6 +817,12 @@ static void mtl_ctx_workarounds_init(struct intel_engine_cs *engine,
 {
 	struct drm_i915_private *i915 = engine->i915;
 
+	dg2_ctx_gt_tuning_init(engine, wal);
+
+	if (IS_MTL_GRAPHICS_STEP(i915, M, STEP_B0, STEP_FOREVER) ||
+	    IS_MTL_GRAPHICS_STEP(i915, P, STEP_B0, STEP_FOREVER))
+		wa_add(wal, DRAW_WATERMARK, VERT_WM_VAL, 0x3FF, 0, false);
+
 	if (IS_MTL_GRAPHICS_STEP(i915, M, STEP_A0, STEP_B0) ||
 	    IS_MTL_GRAPHICS_STEP(i915, P, STEP_A0, STEP_B0)) {
 		/* Wa_14014947963 */
@@ -1748,6 +1754,13 @@ xelpmp_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
  */
 static void gt_tuning_settings(struct intel_gt *gt, struct i915_wa_list *wal)
 {
+	if (IS_METEORLAKE(gt->i915)) {
+		if (gt->type != GT_MEDIA)
+			wa_mcr_write_or(wal, XEHP_L3SCQREG7, BLEND_FILL_CACHING_OPT_DIS);
+
+		wa_mcr_write_or(wal, XEHP_SQCM, EN_32B_ACCESS);
+	}
+
 	if (IS_PONTEVECCHIO(gt->i915)) {
 		wa_mcr_write(wal, XEHPC_L3SCRUB,
 			     SCRUB_CL_DWNGRADE_SHARED | SCRUB_RATE_4B_PER_CLK);
@@ -2944,7 +2957,7 @@ static void
 add_render_compute_tuning_settings(struct drm_i915_private *i915,
 				   struct i915_wa_list *wal)
 {
-	if (IS_DG2(i915))
+	if (IS_METEORLAKE(i915) || IS_DG2(i915))
 		wa_mcr_write_clr_set(wal, RT_CTRL, STACKID_CTRL, STACKID_CTRL_512);
 
 	/*
-- 
2.34.1