nv50: enable primitive id generation when it is an FP input without GP

Signed-off-by: Ilia Mirkin <[email protected]>

2 files changed, 8 insertions, 9 deletions

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_program.c b/src/gallium/drivers/nouveau/nv50/nv50_program.c
index 82e1b8a2232..27d899a4beb 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_program.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_program.c
@@ -168,6 +168,10 @@ nv50_fragprog_assign_slots(struct nv50_ir_prog_info *info)
 
          if (info->in[i].sn == TGSI_SEMANTIC_COLOR)
             prog->vp.bfc[info->in[i].si] = j;
+         else if (info->in[i].sn == TGSI_SEMANTIC_PRIMID) {
+            prog->vp.attrs[2] |= NV50_3D_VP_GP_BUILTIN_ATTR_EN_PRIMITIVE_ID;
+            prog->gp.primid = j;
+         }
 
          prog->in[j].id = i;
          prog->in[j].mask = info->in[i].mask;
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_shader_state.c b/src/gallium/drivers/nouveau/nv50/nv50_shader_state.c
index b24e3ac90e6..6bd1974b4ae 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_shader_state.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_shader_state.c
@@ -401,18 +401,13 @@ nv50_fp_linkage_validate(struct nv50_context *nv50)
          if (vp->out[n].sn == fp->in[i].sn &&
              vp->out[n].si == fp->in[i].si)
             break;
+      if (i == fp->gp.primid) {
+         primid = m;
+      }
       m = nv50_vec4_map(map, m, lin,
                         &fp->in[i], (n < vp->out_nr) ? &vp->out[n] : &dummy);
    }
 
-   /* PrimitiveID either is replaced by the system value, or
-    * written by the geometry shader into an output register
-    */
-   if (fp->gp.primid < 0x80) {
-      primid = m;
-      map[m++] = vp->gp.primid;
-   }
-
    if (vp->gp.has_layer) {
       // In GL4.x, layer can be an fp input, but not in 3.x. Make sure to add
       // it to the output map.
@@ -461,7 +456,7 @@ nv50_fp_linkage_validate(struct nv50_context *nv50)
       PUSH_DATAp(push, map, n);
    } else {
       BEGIN_NV04(push, NV50_3D(VP_GP_BUILTIN_ATTR_EN), 1);
-      PUSH_DATA (push, vp->vp.attrs[2]);
+      PUSH_DATA (push, vp->vp.attrs[2] | fp->vp.attrs[2]);
 
       BEGIN_NV04(push, NV50_3D(SEMANTIC_PRIM_ID), 1);
       PUSH_DATA (push, primid);