freedreno/a3xx: WFI fixes/cleanup

Blob driver seems to need WFI in some cases after CP_EVENT_WRITE,
implying that this is asynchronous and should reset needs_wfi.
Also, CP_INVALIDATE_STATE seems to need WFI.  But CP_LOAD_STATE
does not.

The blob driver also puts WFIs before writing GRAS_CL_VPORT registers.
The latter may be a work-around, as these registers should be banked/
context registers.  I haven't yet found a lockup that this averts, but
I expect viewport to change infrequently so out of paranoia I will
keep these for now.

Signed-off-by: Rob Clark <[email protected]>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_context.h b/src/gallium/drivers/freedreno/freedreno_context.h
index 46984823427..0051c9ddcab 100644
--- a/src/gallium/drivers/freedreno/freedreno_context.h
+++ b/src/gallium/drivers/freedreno/freedreno_context.h
@@ -363,6 +363,17 @@ fd_wfi(struct fd_context *ctx, struct fd_ringbuffer *ring)
 	}
 }
 
+/* emit a CP_EVENT_WRITE:
+ */
+static inline void
+fd_event_write(struct fd_context *ctx, struct fd_ringbuffer *ring,
+		enum vgt_event_type evt)
+{
+	OUT_PKT3(ring, CP_EVENT_WRITE, 1);
+	OUT_RING(ring, evt);
+	fd_reset_wfi(ctx);
+}
+
 struct pipe_context * fd_context_init(struct fd_context *ctx,
 		struct pipe_screen *pscreen, const uint8_t *primtypes,
 		void *priv);