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-rw-r--r--src/mesa/drivers/dri/i965/brw_misc_state.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_misc_state.c b/src/mesa/drivers/dri/i965/brw_misc_state.c
index 95edbc9edcd..8335865b2d3 100644
--- a/src/mesa/drivers/dri/i965/brw_misc_state.c
+++ b/src/mesa/drivers/dri/i965/brw_misc_state.c
@@ -923,6 +923,19 @@ brw_emit_select_pipeline(struct brw_context *brw, enum brw_pipeline pipeline)
PIPE_CONTROL_STATE_CACHE_INVALIDATE |
PIPE_CONTROL_INSTRUCTION_INVALIDATE |
PIPE_CONTROL_NO_WRITE);
+
+ } else {
+ /* From "BXML » GT » MI » vol1a GPU Overview » [Instruction]
+ * PIPELINE_SELECT [DevBWR+]":
+ *
+ * Project: PRE-DEVSNB
+ *
+ * Software must ensure the current pipeline is flushed via an
+ * MI_FLUSH or PIPE_CONTROL prior to the execution of PIPELINE_SELECT.
+ */
+ BEGIN_BATCH(1);
+ OUT_BATCH(MI_FLUSH);
+ ADVANCE_BATCH();
}
/* Select the pipeline */