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drm/i915/kbl: Add WaForGAMHang 

Add this workaround for A0 and B0 revisions

References: HSD#2226935
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-19-git-send-email-mika.kuoppala@intel.com
hifive-unleashed-5.1
Mika Kuoppala 2016-06-07 17:19:10 +03:00 committed by Mika Kuoppala
parent 44fff99ff2
commit 0b2d0934ed
1 changed files with 34 additions and 2 deletions
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36
drivers/gpu/drm/i915/intel_lrc.c
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@ -1652,9 +1652,10 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
struct intel_ringbuffer *ringbuf = request->ringbuf;
struct intel_engine_cs *engine = ringbuf->engine;
u32 scratch_addr = engine->scratch.gtt_offset + 2 * CACHELINE_BYTES;
bool vf_flush_wa = false;
bool vf_flush_wa = false, dc_flush_wa = false;
u32 flags = 0;
int ret;
int len;
flags |= PIPE_CONTROL_CS_STALL;
@ -1681,9 +1682,21 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
*/
if (IS_GEN9(request->i915))
vf_flush_wa = true;
/* WaForGAMHang:kbl */
if (IS_KBL_REVID(request->i915, 0, KBL_REVID_B0))
dc_flush_wa = true;
}
ret = intel_ring_begin(request, vf_flush_wa ? 12 : 6);
len = 6;
if (vf_flush_wa)
len += 6;
if (dc_flush_wa)
len += 12;
ret = intel_ring_begin(request, len);
if (ret)
return ret;
@ -1696,12 +1709,31 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
intel_logical_ring_emit(ringbuf, 0);
}
if (dc_flush_wa) {
intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
intel_logical_ring_emit(ringbuf, PIPE_CONTROL_DC_FLUSH_ENABLE);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
}
intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
intel_logical_ring_emit(ringbuf, flags);
intel_logical_ring_emit(ringbuf, scratch_addr);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
if (dc_flush_wa) {
intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
intel_logical_ring_emit(ringbuf, PIPE_CONTROL_CS_STALL);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
intel_logical_ring_emit(ringbuf, 0);
}
intel_logical_ring_advance(ringbuf);
return 0;