[Mesa-dev] [PATCH 10/13] r600g: only make constant buffers dirty if there's something to update

[Marek Olšák]

---
 src/gallium/drivers/r600/r600_state_common.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c
index 23adf3b..f1d5d57 100644
--- a/src/gallium/drivers/r600/r600_state_common.c
+++ b/src/gallium/drivers/r600/r600_state_common.c
@@ -757,10 +757,12 @@ static void r600_update_alpha_ref(struct r600_context *rctx)
 
 void r600_constant_buffers_dirty(struct r600_context *rctx, struct r600_constbuf_state *state)
 {
-	r600_inval_shader_cache(rctx);
-	state->atom.num_dw = rctx->chip_class >= EVERGREEN ? util_bitcount(state->dirty_mask)*20
-							   : util_bitcount(state->dirty_mask)*19;
-	r600_atom_dirty(rctx, &state->atom);
+	if (state->dirty_mask) {
+		r600_inval_shader_cache(rctx);
+		state->atom.num_dw = rctx->chip_class >= EVERGREEN ? util_bitcount(state->dirty_mask)*20
+								   : util_bitcount(state->dirty_mask)*19;
+		r600_atom_dirty(rctx, &state->atom);
+	}
 }
 
 void r600_set_constant_buffer(struct pipe_context *ctx, uint shader, uint index,
-- 
1.7.9.5