Add this workaround for kbl revid A0 only.
References: HSD#1911714
Signed-off-by: Mika Kuoppala <[email protected]>
---
drivers/gpu/drm/i915/intel_lrc.c | 16 ++++++++++++++++
drivers/gpu/drm/i915/intel_ringbuffer.c | 6 ++++++
2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 5c191a1afaaf..c5e0094d0e75 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1260,6 +1260,22 @@ static int gen9_init_indirectctx_bb(struct
intel_engine_cs *engine,
return ret;
index = ret;
+ /* WaClearSlmSpaceAtContextSwitch:kbl */
+ /* Actual scratch location is at 128 bytes offset */
+ if (IS_KBL_REVID(engine->i915, 0, KBL_REVID_A0)) {
+ uint32_t scratch_addr
+ = engine->scratch.gtt_offset + 2*CACHELINE_BYTES;
+
+ wa_ctx_emit(batch, index, GFX_OP_PIPE_CONTROL(6));
+ wa_ctx_emit(batch, index, (PIPE_CONTROL_FLUSH_L3 |
+ PIPE_CONTROL_GLOBAL_GTT_IVB |
+ PIPE_CONTROL_CS_STALL |
+ PIPE_CONTROL_QW_WRITE));
+ wa_ctx_emit(batch, index, scratch_addr);
+ wa_ctx_emit(batch, index, 0);
+ wa_ctx_emit(batch, index, 0);
+ wa_ctx_emit(batch, index, 0);
+ }
/* Pad to end of cacheline */
while (index % CACHELINE_DWORDS)
wa_ctx_emit(batch, index, MI_NOOP);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c
b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3902700d37ef..195943f77d04 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1181,12 +1181,18 @@ static int bxt_init_workarounds(struct intel_engine_cs
*engine)
static int kbl_init_workarounds(struct intel_engine_cs *engine)
{
+ struct drm_i915_private *dev_priv = engine->i915;
int ret;
ret = gen9_init_workarounds(engine);
if (ret)
return ret;
+ /* WaDisableFenceDestinationToSLM:kbl (pre-prod) */
+ if (IS_KBL_REVID(dev_priv, KBL_REVID_A0, KBL_REVID_A0))
+ WA_SET_BIT_MASKED(HDC_CHICKEN0,
+ HDC_FENCE_DEST_SLM_DISABLE);
+
return 0;
}
--
2.5.0
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