On 09/02/2015 19:33, Damien Lespiau wrote:
Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
Reviewed-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 090ddd7..b4abd50 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5276,6 +5276,7 @@ enum skl_disp_power_wells {
#define HDC_FORCE_NON_COHERENT (1<<4)
#define HDC_DONOT_FETCH_MEM_WHEN_MASKED (1<<11)
#define HDC_FENCE_DEST_SLM_DISABLE (1<<14)
+#define HDC_BARRIER_PERFORMANCE_DISABLE (1<<10)
/* WaCatErrorRejectionIssue */
#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 57432ca..93365fe 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -947,6 +947,13 @@ static int skl_init_workarounds(struct intel_engine_cs *ring)
WA_SET_BIT_MASKED(HIZ_CHICKEN,
BDW_HIZ_POWER_COMPILER_CLOCK_GATING_DISABLE);
+ if (INTEL_REVID(dev) == SKL_REVID_C0 ||
+ INTEL_REVID(dev) == SKL_REVID_D0)
+ /* WaBarrierPerformanceFixDisable:skl */
+ WA_SET_BIT_MASKED(HDC_CHICKEN0,
+ HDC_FENCE_DEST_SLM_DISABLE |
+ HDC_BARRIER_PERFORMANCE_DISABLE);
+
return 0;
}
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