mirror of https://gitee.com/openkylin/linux.git
drm/i915/bdw: Flush system agent on gen8 also
gem_gtt_cpu_tlb seems to indicate that it is needed. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72869 Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -906,14 +906,12 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
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WARN_ON(readq(>t_entries[i-1])
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!= gen8_pte_encode(addr, level, true));
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#if 0 /* TODO: Still needed on GEN8? */
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/* This next bit makes the above posting read even more important. We
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* want to flush the TLBs only after we're certain all the PTE updates
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* have finished.
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*/
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I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
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POSTING_READ(GFX_FLSH_CNTL_GEN6);
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#endif
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}
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/*
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