nvc0: force vertex data through FIFO if we need to convert it

We may want to put the converted vertex buffer in persistent
storage instead, but these are rare corner cases.

diff --git a/src/gallium/drivers/nvc0/nvc0_stateobj.h b/src/gallium/drivers/nvc0/nvc0_stateobj.h
index 752e927e2aa62003499afbee26e4eaca39f76851..5b15e286751e00599cb979f52382480e9d06b562 100644 (file)
--- a/src/gallium/drivers/nvc0/nvc0_stateobj.h
+++ b/src/gallium/drivers/nvc0/nvc0_stateobj.h
@@ -67,6 +67,7 @@ struct nvc0_vertex_stateobj {
    unsigned num_elements;
    uint32_t instance_elts;
    uint32_t instance_bufs;
+   boolean need_conversion; /* e.g. VFETCH cannot convert f64 to f32 */
    unsigned vtx_size;
    unsigned vtx_per_packet_max;
    struct nvc0_vertex_element element[0];

diff --git a/src/gallium/drivers/nvc0/nvc0_vbo.c b/src/gallium/drivers/nvc0/nvc0_vbo.c
index fb135725c3f9034e33769e5f98f7273015d0fad2..19fd85273c105ae5a5388d8d123960937d247d4f 100644 (file)
--- a/src/gallium/drivers/nvc0/nvc0_vbo.c
+++ b/src/gallium/drivers/nvc0/nvc0_vbo.c
@@ -60,6 +60,7 @@ nvc0_vertex_state_create(struct pipe_context *pipe,
     so->num_elements = num_elements;
     so->instance_elts = 0;
     so->instance_bufs = 0;
+    so->need_conversion = FALSE;
 
     transkey.nr_elements = 0;
     transkey.output_stride = 0;
@@ -83,6 +84,7 @@ nvc0_vertex_state_create(struct pipe_context *pipe,
                 return NULL;
             }
             so->element[i].state = nvc0_format_table[fmt].vtx;
+            so->need_conversion = TRUE;
         }
         so->element[i].state |= i;
 
@@ -263,7 +265,12 @@ nvc0_vertex_arrays_validate(struct nvc0_context *nvc0)
    struct nvc0_vertex_element *ve;
    unsigned i;
 
-   nvc0_prevalidate_vbufs(nvc0);
+   if (unlikely(vertex->need_conversion)) {
+      nvc0->vbo_fifo = ~0;
+      nvc0->vbo_user = 0;
+   } else {
+      nvc0_prevalidate_vbufs(nvc0);
+   }
 
    BEGIN_RING(chan, RING_3D(VERTEX_ATTRIB_FORMAT(0)), vertex->num_elements);
    for (i = 0; i < vertex->num_elements; ++i) {