Set chicken bits to workaround a possible pixel shader
dispatch hang.
Bspec: 14091, ID#0651
Signed-off-by: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
drivers/gpu/drm/i915/intel_workarounds.c | 9 +++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c1c0f7ab03e9..499cc843443d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8902,11 +8902,15 @@ enum {
#define GEN7_ROW_CHICKEN2_GT2 _MMIO(0xf4f4)
#define DOP_CLOCK_GATING_DISABLE (1 << 0)
#define PUSH_CONSTANT_DEREF_DISABLE (1 << 8)
+#define GEN8_DISABLE_RR_ARBITRATION (1 << 1)
#define GEN11_TDL_CLOCK_GATING_FIX_DISABLE (1 << 1)
#define HSW_ROW_CHICKEN3 _MMIO(0xe49c)
#define HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE (1 << 6)
+#define GEN8_ROW_CHICKEN4 _MMIO(0xe48c)
+#define GEN8_DISABLE_TDL_FIX (1 << 3)
+
#define HALF_SLICE_CHICKEN2 _MMIO(0xe180)
#define GEN8_ST_PO_DISABLE (1 << 13)
diff --git a/drivers/gpu/drm/i915/intel_workarounds.c
b/drivers/gpu/drm/i915/intel_workarounds.c
index ccaf63679435..4f1a7500ca07 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -294,6 +294,15 @@ static void gen9_ctx_workarounds_init(struct
intel_engine_cs *engine)
FLOW_CONTROL_ENABLE |
PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
+ /* Bspec wa: 0651, skl G0 onwards */
+ if (!IS_SKL_REVID(i915, SKL_REVID_A0, SKL_REVID_F0)) {
+ WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
+ GEN8_DISABLE_RR_ARBITRATION);
+
+ /* Make sure the default holds to enable TDL fix */
+ WA_CLR_BIT_MASKED(GEN8_ROW_CHICKEN4, GEN8_DISABLE_TDL_FIX);
+ }
+
/* Syncing dependencies between camera and graphics:skl,bxt,kbl */
if (!IS_COFFEELAKE(i915))
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
--
2.17.1
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