Signed-off-by: Nick Hoath <nicholas.hoath@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_ringbuffer.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 91eef06..d34432b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6318,6 +6318,7 @@ enum skl_disp_power_wells {
#define GEN7_HALF_SLICE_CHICKEN1_GT2 0xf100
#define GEN7_MAX_PS_THREAD_DEP (8<<12)
#define GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE (1<<10)
+#define GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE (1<<4)
#define GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE (1<<3)
#define GEN9_HALF_SLICE_CHICKEN5 0xe188
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 5aad253..eebee73 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1047,6 +1047,13 @@ static int bxt_init_workarounds(struct intel_engine_cs *ring)
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
STALL_DOP_GATING_DISABLE);
+ /* WaDisableSbeCacheDispatchPortSharing:bxt */
+ if (INTEL_REVID(dev) <= BXT_REVID_B0) {
+ WA_SET_BIT_MASKED(
+ GEN7_HALF_SLICE_CHICKEN1,
+ GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
+ }
+
return 0;
}
--
2.1.1
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