Disable Early Read and Src Swap by setting the bit 14
and 15 in the chicken register.
BSpec: 46045,52890
v2: Follow the Bspec implementation for the WA.
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 5 +++++
drivers/gpu/drm/i915/i915_reg.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 5a7db279f702..c1c970b15395 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -593,6 +593,11 @@ static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine,
wa_add(wal, FF_MODE2, FF_MODE2_TDS_TIMER_MASK, val,
IS_TGL_REVID(engine->i915, TGL_REVID_A0, TGL_REVID_A0) ? 0 :
FF_MODE2_TDS_TIMER_MASK);
+
+ /* Wa_1606931601:tgl */
+ WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
+ GEN11_EARLY_READ_SRC0_DISABLE);
+
}
static void
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b93c4c18f05c..c8b51ccfa5e6 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9146,6 +9146,7 @@ enum {
#define DOP_CLOCK_GATING_DISABLE (1 << 0)
#define PUSH_CONSTANT_DEREF_DISABLE (1 << 8)
#define GEN11_TDL_CLOCK_GATING_FIX_DISABLE (1 << 1)
+#define GEN11_EARLY_READ_SRC0_DISABLE (1 << 14)
#define HSW_ROW_CHICKEN3 _MMIO(0xe49c)
#define HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE (1 << 6)
--
2.23.0
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