The TGL/RKL/DG1/ADL performance tuning guide suggests programming a
literal value of 0x2FC0100F for this register. The register's hardware
default value is 0x2FC0108F, so this translates to just clearing one
bit.
Take this opportunity to also clean up the register definition and
re-write its existing bits/fields in the preferred notation.
Bspec: 31870
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 9 +++++----
drivers/gpu/drm/i915/gt/intel_workarounds.c | 4 ++++
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 61a5c9a83b1b..f8eb807b56f9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -958,10 +958,11 @@
#define GEN7_DISABLE_SAMPLER_PREFETCH (1 << 30)
#define GEN8_GARBCNTL _MMIO(0xb004)
-#define GEN9_GAPS_TSV_CREDIT_DISABLE (1 << 7)
-#define GEN11_ARBITRATION_PRIO_ORDER_MASK (0x3f << 22)
-#define GEN11_HASH_CTRL_EXCL_MASK (0x7f << 0)
-#define GEN11_HASH_CTRL_EXCL_BIT0 (1 << 0)
+#define GEN11_ARBITRATION_PRIO_ORDER_MASK REG_GENMASK(27, 22)
+#define GEN12_BUS_HASH_CTL_BIT_EXC REG_BIT(7)
+#define GEN9_GAPS_TSV_CREDIT_DISABLE REG_BIT(7)
+#define GEN11_HASH_CTRL_EXCL_MASK REG_GENMASK(6, 0)
+#define GEN11_HASH_CTRL_EXCL_BIT0 REG_FIELD_PREP(GEN11_HASH_CTRL_EXCL_MASK, 0x1)
#define GEN9_SCRATCH_LNCF1 _MMIO(0xb008)
#define GEN9_LNCF_NONIA_COHERENT_ATOMICS_ENABLE REG_BIT(0)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 85822ebb0d64..2f13a92f77d3 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -2937,6 +2937,10 @@ add_render_compute_tuning_settings(struct drm_i915_private *i915,
if (INTEL_INFO(i915)->tuning_thread_rr_after_dep)
wa_mcr_masked_field_set(wal, GEN9_ROW_CHICKEN4, THREAD_EX_ARB_MODE,
THREAD_EX_ARB_MODE_RR_AFTER_DEP);
+
+ if (GRAPHICS_VER(i915) == 12 && GRAPHICS_VER_FULL(i915) < IP_VER(12, 50)) {
+ wa_write_clr(wal, GEN8_GARBCNTL, GEN12_BUS_HASH_CTL_BIT_EXC);
+ }
}
/*
--
2.38.1
