nv50,nvc0: implement colour clamping controls

8 files changed, 52 insertions, 6 deletions

diff --git a/src/gallium/drivers/nv50/nv50_3d.xml.h b/src/gallium/drivers/nv50/nv50_3d.xml.h
index 9bb3211728c..92b97ddb9f4 100644
--- a/src/gallium/drivers/nv50/nv50_3d.xml.h
+++ b/src/gallium/drivers/nv50/nv50_3d.xml.h
@@ -1673,7 +1673,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define NV50_3D_MAP_SEMANTIC_0_BFC0_ID__SHIFT			8
 #define NV50_3D_MAP_SEMANTIC_0_COLR_NR__MASK			0x00ff0000
 #define NV50_3D_MAP_SEMANTIC_0_COLR_NR__SHIFT			16
-#define NV50_3D_MAP_SEMANTIC_0_CLMP_EN				0xff000000
+#define NV50_3D_MAP_SEMANTIC_0_CLMP_EN				0x01000000
 
 #define NV50_3D_MAP_SEMANTIC_1					0x00001908
 #define NV50_3D_MAP_SEMANTIC_1_CLIP_START__MASK			0x000000ff
diff --git a/src/gallium/drivers/nv50/nv50_context.h b/src/gallium/drivers/nv50/nv50_context.h
index 46e6c2250af..f480f043096 100644
--- a/src/gallium/drivers/nv50/nv50_context.h
+++ b/src/gallium/drivers/nv50/nv50_context.h
@@ -80,6 +80,8 @@ struct nv50_context {
       uint32_t instance_elts; /* bitmask of per-instance elements */
       uint32_t instance_base;
       uint32_t interpolant_ctrl;
+      uint32_t semantic_color;
+      uint32_t semantic_psize;
       int32_t index_bias;
       boolean prim_restart;
       boolean point_sprite;
@@ -183,7 +185,7 @@ void nv50_fragprog_validate(struct nv50_context *);
 void nv50_fp_linkage_validate(struct nv50_context *);
 void nv50_gp_linkage_validate(struct nv50_context *);
 void nv50_constbufs_validate(struct nv50_context *);
-void nv50_sprite_coords_validate(struct nv50_context *);
+void nv50_validate_derived_rs(struct nv50_context *);
 
 /* nv50_state.c */
 extern void nv50_init_state_functions(struct nv50_context *);
diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index a63f9d8a6d5..37025a6f12e 100644
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -486,7 +486,7 @@ nv50_fragprog_prepare(struct nv50_translation_info *ti)
       ++nintp;
    }
 
-   p->fp.colors = (1 << 24) | 4; /* CLAMP, FFC0_ID = 4 */
+   p->fp.colors = 4 << NV50_3D_MAP_SEMANTIC_0_FFC0_ID__SHIFT; /* after HPOS */
 
    for (i = 0; i < p->in_nr; ++i) {
       int j = p->in[i].id;
diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
index 7690c80eef0..9978d1e7861 100644
--- a/src/gallium/drivers/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -108,6 +108,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_MAX_RENDER_TARGETS:
       return 8;
+   case PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL:
+      return 1;
    case PIPE_CAP_TIMER_QUERY:
    case PIPE_CAP_OCCLUSION_QUERY:
       return 1;
diff --git a/src/gallium/drivers/nv50/nv50_shader_state.c b/src/gallium/drivers/nv50/nv50_shader_state.c
index bea9c095bb3..82c346cb5ea 100644
--- a/src/gallium/drivers/nv50/nv50_shader_state.c
+++ b/src/gallium/drivers/nv50/nv50_shader_state.c
@@ -226,7 +226,7 @@ nv50_gmtyprog_validate(struct nv50_context *nv50)
    OUT_RING  (chan, gp->code_base);
 }
 
-void
+static void
 nv50_sprite_coords_validate(struct nv50_context *nv50)
 {
    struct nouveau_channel *chan = nv50->screen->base.channel;
@@ -282,6 +282,39 @@ nv50_sprite_coords_validate(struct nv50_context *nv50)
    OUT_RINGp (chan, pntc, 8);
 }
 
+/* Validate state derived from shaders and the rasterizer cso. */
+void
+nv50_validate_derived_rs(struct nv50_context *nv50)
+{
+   struct nouveau_channel *chan = nv50->screen->base.channel;
+   uint32_t color, psize;
+
+   nv50_sprite_coords_validate(nv50);
+
+   if (nv50->dirty & NV50_NEW_FRAGPROG)
+      return;
+   psize = nv50->state.semantic_psize & ~NV50_3D_MAP_SEMANTIC_3_PTSZ_EN__MASK;
+   color = nv50->state.semantic_color & ~NV50_3D_MAP_SEMANTIC_0_CLMP_EN;
+
+   if (nv50->rast->pipe.clamp_vertex_color)
+      color |= NV50_3D_MAP_SEMANTIC_0_CLMP_EN;
+
+   if (color != nv50->state.semantic_color) {
+      nv50->state.semantic_color = color;
+      BEGIN_RING(chan, RING_3D(MAP_SEMANTIC_0), 1);
+      OUT_RING  (chan, color);
+   }
+
+   if (nv50->rast->pipe.point_size_per_vertex)
+      psize |= NV50_3D_MAP_SEMANTIC_3_PTSZ_EN__MASK;
+
+   if (psize != nv50->state.semantic_psize) {
+      nv50->state.semantic_psize = psize;
+      BEGIN_RING(chan, RING_3D(MAP_SEMANTIC_3), 1);
+      OUT_RING  (chan, psize);
+   }
+}
+
 static int
 nv50_vec4_map(uint8_t *map, int mid, uint32_t lin[4],
               struct nv50_varying *in, struct nv50_varying *out)
@@ -372,6 +405,9 @@ nv50_fp_linkage_validate(struct nv50_context *nv50)
       map[m++] = vp->vp.psiz;
    }
 
+   if (nv50->rast->pipe.clamp_vertex_color)
+      colors |= NV50_3D_MAP_SEMANTIC_0_CLMP_EN;
+
    n = (m + 3) / 4;
    assert(m <= 64);
 
@@ -404,6 +440,9 @@ nv50_fp_linkage_validate(struct nv50_context *nv50)
 
    nv50->state.interpolant_ctrl = interp;
 
+   nv50->state.semantic_color = colors;
+   nv50->state.semantic_psize = psiz;
+
    BEGIN_RING(chan, RING_3D(NOPERSPECTIVE_BITMAP(0)), 4);
    OUT_RINGp (chan, lin, 4);
 
diff --git a/src/gallium/drivers/nv50/nv50_state.c b/src/gallium/drivers/nv50/nv50_state.c
index db257159698..4c96db84e43 100644
--- a/src/gallium/drivers/nv50/nv50_state.c
+++ b/src/gallium/drivers/nv50/nv50_state.c
@@ -198,6 +198,9 @@ nv50_rasterizer_state_create(struct pipe_context *pipe,
    SB_BEGIN_3D(so, VERTEX_TWO_SIDE_ENABLE, 1);
    SB_DATA    (so, cso->light_twoside);
 
+   SB_BEGIN_3D(so, FRAG_COLOR_CLAMP_EN, 1);
+   SB_DATA    (so, cso->clamp_fragment_color ? 0x11111111 : 0x00000000);
+
    SB_BEGIN_3D(so, LINE_WIDTH, 1);
    SB_DATA    (so, fui(cso->line_width));
    SB_BEGIN_3D(so, LINE_SMOOTH_ENABLE, 1);
diff --git a/src/gallium/drivers/nv50/nv50_state_validate.c b/src/gallium/drivers/nv50/nv50_state_validate.c
index f3d45eb95e0..cdf1a982fcc 100644
--- a/src/gallium/drivers/nv50/nv50_state_validate.c
+++ b/src/gallium/drivers/nv50/nv50_state_validate.c
@@ -309,7 +309,7 @@ static struct state_validate {
     { nv50_fp_linkage_validate,    NV50_NEW_FRAGPROG | NV50_NEW_VERTPROG |
                                    NV50_NEW_GMTYPROG },
     { nv50_gp_linkage_validate,    NV50_NEW_GMTYPROG | NV50_NEW_VERTPROG },
-    { nv50_sprite_coords_validate, NV50_NEW_FRAGPROG | NV50_NEW_RASTERIZER |
+    { nv50_validate_derived_rs,    NV50_NEW_FRAGPROG | NV50_NEW_RASTERIZER |
                                    NV50_NEW_VERTPROG | NV50_NEW_GMTYPROG },
     { nv50_constbufs_validate,     NV50_NEW_CONSTBUF },
     { nv50_validate_textures,      NV50_NEW_TEXTURES },
diff --git a/src/gallium/drivers/nv50/nv50_stateobj.h b/src/gallium/drivers/nv50/nv50_stateobj.h
index 515e3e78d42..cd55ad83f84 100644
--- a/src/gallium/drivers/nv50/nv50_stateobj.h
+++ b/src/gallium/drivers/nv50/nv50_stateobj.h
@@ -27,7 +27,7 @@ struct nv50_blend_stateobj {
 struct nv50_rasterizer_stateobj {
    struct pipe_rasterizer_state pipe;
    int size;
-   uint32_t state[40];
+   uint32_t state[42];
 };
 
 struct nv50_zsa_stateobj {