From: Marek Olšák <marek.ol...@amd.com>
I actually couldn't reproduce this one, but internal docs recommend this
workaround. Better safe than sorry.
Also, the number of dwords for the sync packets is increased by 4 instead
of 2, because it wasn't bumped last time when a new packet was added there.
Cc: mesa-sta...@lists.freedesktop.org
---
src/gallium/drivers/radeon/r600_pipe_common.h | 1 +
src/gallium/drivers/radeonsi/si_state_draw.c | 14 +++++++++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h
b/src/gallium/drivers/radeon/r600_pipe_common.h
index 5348b8d..dcec2bb 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -72,6 +72,7 @@
#define R600_CONTEXT_WAIT_3D_IDLE (1 << 17)
#define R600_CONTEXT_WAIT_CP_DMA_IDLE (1 << 18)
#define R600_CONTEXT_VGT_FLUSH (1 << 19)
+#define R600_CONTEXT_VGT_STREAMOUT_SYNC (1 << 20)
/* Debug flags. */
/* logging */
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c
b/src/gallium/drivers/radeonsi/si_state_draw.c
index 1816540..eb21ba1 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -868,11 +868,15 @@ void si_emit_cache_flush(struct r600_common_context
*sctx, struct r600_atom *ato
radeon_emit(cs, PKT3(PKT3_EVENT_WRITE, 0, 0));
radeon_emit(cs, EVENT_TYPE(V_028A90_VGT_FLUSH) |
EVENT_INDEX(0));
}
+ if (sctx->flags & R600_CONTEXT_VGT_STREAMOUT_SYNC) {
+ radeon_emit(cs, PKT3(PKT3_EVENT_WRITE, 0, 0));
+ radeon_emit(cs, EVENT_TYPE(V_028A90_VGT_STREAMOUT_SYNC) |
EVENT_INDEX(0));
+ }
sctx->flags = 0;
}
-const struct r600_atom si_atom_cache_flush = { si_emit_cache_flush, 13 }; /*
number of CS dwords */
+const struct r600_atom si_atom_cache_flush = { si_emit_cache_flush, 17 }; /*
number of CS dwords */
static void si_get_draw_start_count(struct si_context *sctx,
const struct pipe_draw_info *info,
@@ -985,6 +989,14 @@ void si_draw_vbo(struct pipe_context *ctx, const struct
pipe_draw_info *info)
}
#endif
+ /* Workaround for a VGT hang when streamout is enabled.
+ * It must be done after drawing. */
+ if (sctx->b.family == CHIP_HAWAII &&
+ (sctx->b.streamout.streamout_enabled ||
+ sctx->b.streamout.prims_gen_query_enabled)) {
+ sctx->b.flags |= R600_CONTEXT_VGT_STREAMOUT_SYNC;
+ }
+
/* Set the depth buffer as dirty. */
if (sctx->framebuffer.state.zsbuf) {
struct pipe_surface *surf = sctx->framebuffer.state.zsbuf;
--
1.9.1
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