[Mesa-dev] [PATCH 02/12] nvc0: add support for setting patch vertices at draw time

[Ilia Mirkin]

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/gallium/drivers/nouveau/nvc0/nvc0_screen.c       | 1 +
 src/gallium/drivers/nouveau/nvc0/nvc0_screen.h       | 1 +
 src/gallium/drivers/nouveau/nvc0/nvc0_shader_state.c | 3 ---
 src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c          | 6 ++++++
 4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index ff552ae..4bc41f2 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -1004,6 +1004,7 @@ nvc0_screen_create(struct nouveau_device *dev)
    PUSH_DATA (push, 0x20);
    BEGIN_NVC0(push, NVC0_3D(SP_SELECT(0)), 1);
    PUSH_DATA (push, 0x00);
+   screen->save_state.patch_vertices = 3;
 
    BEGIN_NVC0(push, NVC0_3D(POINT_COORD_REPLACE), 1);
    PUSH_DATA (push, 0);
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
index ef2bd43..c79211e 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
@@ -38,6 +38,7 @@ struct nvc0_graph_state {
    uint32_t constant_elts;
    int32_t index_bias;
    uint16_t scissor;
+   uint8_t patch_vertices;
    uint8_t vbo_mode; /* 0 = normal, 1 = translate, 3 = translate, forced */
    uint8_t num_vtxbufs;
    uint8_t num_vtxelts;
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_shader_state.c b/src/gallium/drivers/nouveau/nvc0/nvc0_shader_state.c
index 516b33b..32f4519 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_shader_state.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_shader_state.c
@@ -147,9 +147,6 @@ nvc0_tctlprog_validate(struct nvc0_context *nvc0)
       PUSH_DATA (push, tp->code_base);
       BEGIN_NVC0(push, NVC0_3D(SP_GPR_ALLOC(2)), 1);
       PUSH_DATA (push, tp->num_gprs);
-
-      if (tp->tp.input_patch_size <= 32)
-         IMMED_NVC0(push, NVC0_3D(PATCH_VERTICES), tp->tp.input_patch_size);
    } else {
       BEGIN_NVC0(push, NVC0_3D(SP_SELECT(2)), 1);
       PUSH_DATA (push, 0x20);
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c b/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
index f8e2759..fb7b073 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c
@@ -887,6 +887,12 @@ nvc0_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
       }
    }
 
+   if (info->mode == PIPE_PRIM_PATCHES &&
+       nvc0->state.patch_vertices != info->vertices_per_patch) {
+      IMMED_NVC0(push, NVC0_3D(PATCH_VERTICES), nvc0->state.patch_vertices);
+      nvc0->state.patch_vertices = info->vertices_per_patch;
+   }
+
    /* 8 as minimum to avoid immediate double validation of new buffers */
    nvc0_state_validate(nvc0, ~0, 8);
 
-- 
2.3.6