[Mesa-dev] [PATCH] nvc0: do not invalidate compute constbufs on Kepler

[Samuel Pitoiset]

Constbufs are only aliased on Fermi and this will reduce the number of
flushes when we switch between 3d and compute.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c b/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
index 7a9abe5..a77486d 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
@@ -486,10 +486,12 @@ nvc0_constbufs_validate(struct nvc0_context *nvc0)
       }
    }
 
-   /* Invalidate all COMPUTE constbufs because they are aliased with 3D. */
-   nvc0->dirty_cp |= NVC0_NEW_CP_CONSTBUF;
-   nvc0->constbuf_dirty[5] |= nvc0->constbuf_valid[5];
-   nvc0->state.uniform_buffer_bound[5] = 0;
+   if (nvc0->screen->base.class_3d < NVE4_3D_CLASS) {
+      /* Invalidate all COMPUTE constbufs because they are aliased with 3D. */
+      nvc0->dirty_cp |= NVC0_NEW_CP_CONSTBUF;
+      nvc0->constbuf_dirty[5] |= nvc0->constbuf_valid[5];
+      nvc0->state.uniform_buffer_bound[5] = 0;
+   }
 }
 
 static void
-- 
2.8.2