Mesa (master): freedreno: use bypass if only clears

[Rob Clark]

Module: Mesa
Branch: master
Commit: 3ab072d3c8643c66d8e07e63df970b792728bac6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3ab072d3c8643c66d8e07e63df970b792728bac6

Author: Rob Clark <robdclark at gmail.com>
Date:   Fri May 12 14:24:33 2017 -0400

freedreno: use bypass if only clears

Some things trigger batches that only contain a clear (like glmark2
startup).  No point to use GMEM for this.

Signed-off-by: Rob Clark <robdclark at gmail.com>

---

 src/gallium/drivers/freedreno/freedreno_gmem.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/freedreno/freedreno_gmem.c b/src/gallium/drivers/freedreno/freedreno_gmem.c
index d4b2e8d92f..310a0266c9 100644
--- a/src/gallium/drivers/freedreno/freedreno_gmem.c
+++ b/src/gallium/drivers/freedreno/freedreno_gmem.c
@@ -390,7 +390,10 @@ fd_gmem_render_tiles(struct fd_batch *batch)
 	bool sysmem = false;
 
 	if (ctx->emit_sysmem_prep) {
-		if (batch->cleared || batch->gmem_reason || (batch->num_draws > 5)) {
+		if (batch->num_draws == 0) {
+			sysmem = true;
+		} else if (batch->cleared || batch->gmem_reason || (batch->num_draws > 5)) {
+			// TODO maybe consider # of draws w/ blend enabled, etc?
 			DBG("GMEM: cleared=%x, gmem_reason=%x, num_draws=%u",
 				batch->cleared, batch->gmem_reason, batch->num_draws);
 		} else if (!(fd_mesa_debug & FD_DBG_NOBYPASS)) {