Mesa (master): freedreno/a5xx: fix random faults on first sysmem draw

[Rob Clark]

Module: Mesa
Branch: master
Commit: abcf8f5b58736c21d350e1b6ac2cfc69ed1fed6f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=abcf8f5b58736c21d350e1b6ac2cfc69ed1fed6f

Author: Rob Clark <robdclark at gmail.com>
Date:   Wed Dec  7 15:21:56 2016 -0500

freedreno/a5xx: fix random faults on first sysmem draw

Not sure what this event is, but blob writes it.. and it seems to solve
random write faults at mystery address that would sometimes happen on
first BYPASS draw.

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

---

 src/gallium/drivers/freedreno/a5xx/fd5_gmem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/freedreno/a5xx/fd5_gmem.c b/src/gallium/drivers/freedreno/a5xx/fd5_gmem.c
index cf1cd76..775d5b9 100644
--- a/src/gallium/drivers/freedreno/a5xx/fd5_gmem.c
+++ b/src/gallium/drivers/freedreno/a5xx/fd5_gmem.c
@@ -485,6 +485,9 @@ fd5_emit_sysmem_prep(struct fd_batch *batch)
 	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
 	OUT_RING(ring, 0x0);
 
+	OUT_PKT7(ring, CP_EVENT_WRITE, 1);
+	OUT_RING(ring, UNK_19);
+
 	OUT_PKT4(ring, REG_A5XX_PC_POWER_CNTL, 1);
 	OUT_RING(ring, 0x00000003);   /* PC_POWER_CNTL */