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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>
This commit is contained in:
Ben Widawsky 2013-12-24 15:18:54 -08:00 committed by Daniel Vetter
parent d6e0a2dd12
commit 058840c7a0
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -906,14 +906,12 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
WARN_ON(readq(&gtt_entries[i-1])
!= gen8_pte_encode(addr, level, true));
#if 0 /* TODO: Still needed on GEN8? */
/* This next bit makes the above posting read even more important. We
* want to flush the TLBs only after we're certain all the PTE updates
* have finished.
*/
I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
POSTING_READ(GFX_FLSH_CNTL_GEN6);
#endif
}
/*