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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [sna gen4 w/a] corrupt rendering (including wrong rendering of characters and flickering on redraw)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=55500#c181">Comment # 181</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [sna gen4 w/a] corrupt rendering (including wrong rendering of characters and flickering on redraw)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=55500">bug 55500</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Sigh.
Probably,
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index 1580707..ba9c9bc 100644
--- a/src/sna/gen4_render.c
+++ b/src/sna/gen4_render.c
@@ -602,6 +602,7 @@ gen4_emit_pipe_break(struct sna *sna)
inline static void
gen4_emit_pipe_invalidate(struct sna *sna)
{
+#if 0
OUT_BATCH(GEN4_PIPE_CONTROL |
GEN4_PIPE_CONTROL_WC_FLUSH |
(sna->kgem.gen >= 045 ? GEN4_PIPE_CONTROL_TC_FLUSH : 0) |
@@ -609,6 +610,9 @@ gen4_emit_pipe_invalidate(struct sna *sna)
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
+#else
+ OUT_BATCH(MI_FLUSH);
+#endif
}</pre>
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