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
}
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https://bugs.launchpad.net/bugs/1098334
Title:
[gen4 sna] Font corruption
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