nv50,nvc0: set vertex id base to index_bias

Fixes the piglits which check that gl_VertexID includes the base vertex
offset:
  arb_draw_indirect-vertexid elements
  gl-3.2-basevertex-vertexid

Note that this leaves out the original G80, for which this will continue
to fail. It could be fixed by passing a driver constbuf value in, but
that's beyond the scope of this change.

Signed-off-by: Ilia Mirkin <[email protected]>
Cc: "10.3 10.4" <[email protected]>

2 files changed, 15 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index ff087341de1..2d8347b0ad8 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -608,6 +608,13 @@ nv50_screen_init_hwctx(struct nv50_screen *screen)
    BEGIN_NV04(push, NV50_3D(EDGEFLAG), 1);
    PUSH_DATA (push, 1);
 
+   BEGIN_NV04(push, NV50_3D(VB_ELEMENT_BASE), 1);
+   PUSH_DATA (push, 0);
+   if (screen->base.class_3d >= NV84_3D_CLASS) {
+      BEGIN_NV04(push, SUBC_3D(NV84_3D_VERTEX_ID_BASE), 1);
+      PUSH_DATA (push, 0);
+   }
+
    PUSH_KICK (push);
 }
 
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_vbo.c b/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
index 5a4a4578d51..c1590eefe9f 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_vbo.c
@@ -472,6 +472,10 @@ nv50_draw_arrays(struct nv50_context *nv50,
    if (nv50->state.index_bias) {
       BEGIN_NV04(push, NV50_3D(VB_ELEMENT_BASE), 1);
       PUSH_DATA (push, 0);
+      if (nv50->screen->base.class_3d >= NV84_3D_CLASS) {
+         BEGIN_NV04(push, SUBC_3D(NV84_3D_VERTEX_ID_BASE), 1);
+         PUSH_DATA (push, 0);
+      }
       nv50->state.index_bias = 0;
    }
 
@@ -594,6 +598,10 @@ nv50_draw_elements(struct nv50_context *nv50, boolean shorten,
    if (index_bias != nv50->state.index_bias) {
       BEGIN_NV04(push, NV50_3D(VB_ELEMENT_BASE), 1);
       PUSH_DATA (push, index_bias);
+      if (nv50->screen->base.class_3d >= NV84_3D_CLASS) {
+         BEGIN_NV04(push, SUBC_3D(NV84_3D_VERTEX_ID_BASE), 1);
+         PUSH_DATA (push, index_bias);
+      }
       nv50->state.index_bias = index_bias;
    }