From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Date: Mon, 11 Apr 2016 13:53:43 +0000 (+0200)
Subject: radeonsi: Synchronize a streamout write after read hazard.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fc67375379ec26eef63f8e530724cd53c97bc3d0;p=mesa.git

radeonsi: Synchronize a streamout write after read hazard.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---

diff --git a/src/gallium/drivers/radeonsi/si_descriptors.c b/src/gallium/drivers/radeonsi/si_descriptors.c
index 6dd2e4fd89d..b3792c23474 100644
--- a/src/gallium/drivers/radeonsi/si_descriptors.c
+++ b/src/gallium/drivers/radeonsi/si_descriptors.c
@@ -883,6 +883,12 @@ static void si_set_streamout_targets(struct pipe_context *ctx,
 				 SI_CONTEXT_VS_PARTIAL_FLUSH;
 	}
 
+	/* All readers of the streamout targets need to be finished before we can
+	 * start writing to the targets.
+	 */
+	if (num_targets)
+		sctx->b.flags |= SI_CONTEXT_PS_PARTIAL_FLUSH;
+
 	/* Streamout buffers must be bound in 2 places:
 	 * 1) in VGT by setting the VGT_STRMOUT registers
 	 * 2) as shader resources