Mesa (master): nv50: account for the int RT0 rule for alpha-to-one/cov

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: a6ad49cbbd599aec054d0a3163fff5ad724f2b18
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a6ad49cbbd599aec054d0a3163fff5ad724f2b18

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Sun Aug 23 02:56:45 2015 -0400

nv50: account for the int RT0 rule for alpha-to-one/cov

Same as commit 1af0641db but for nvc0. If an integer texture is
bound to RT0, don't do alpha-to-one or alpha-to-coverage.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: "11.0" <mesa-stable at lists.freedesktop.org>

---

 src/gallium/drivers/nouveau/nv50/nv50_state.c      |   10 ---------
 .../drivers/nouveau/nv50/nv50_state_validate.c     |   22 ++++++++++++++++++++
 src/gallium/drivers/nouveau/nv50/nv50_stateobj.h   |    2 +-
 3 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_state.c b/src/gallium/drivers/nouveau/nv50/nv50_state.c
index 9505a0b..410e631 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_state.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_state.c
@@ -117,7 +117,6 @@ nv50_blend_state_create(struct pipe_context *pipe,
    struct nv50_blend_stateobj *so = CALLOC_STRUCT(nv50_blend_stateobj);
    int i;
    bool emit_common_func = cso->rt[0].blend_enable;
-   uint32_t ms;
 
    if (nv50_context(pipe)->screen->tesla->oclass >= NVA3_3D_CLASS) {
       SB_BEGIN_3D(so, BLEND_INDEPENDENT, 1);
@@ -189,15 +188,6 @@ nv50_blend_state_create(struct pipe_context *pipe,
       SB_DATA    (so, nv50_colormask(cso->rt[0].colormask));
    }
 
-   ms = 0;
-   if (cso->alpha_to_coverage)
-      ms |= NV50_3D_MULTISAMPLE_CTRL_ALPHA_TO_COVERAGE;
-   if (cso->alpha_to_one)
-      ms |= NV50_3D_MULTISAMPLE_CTRL_ALPHA_TO_ONE;
-
-   SB_BEGIN_3D(so, MULTISAMPLE_CTRL, 1);
-   SB_DATA    (so, ms);
-
    assert(so->size <= (sizeof(so->state) / sizeof(so->state[0])));
    return so;
 }
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c b/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c
index 985603d..b304a17 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c
@@ -1,4 +1,6 @@
 
+#include "util/u_format.h"
+
 #include "nv50/nv50_context.h"
 #include "nv50/nv50_defs.xml.h"
 
@@ -314,6 +316,25 @@ nv50_validate_derived_2(struct nv50_context *nv50)
 }
 
 static void
+nv50_validate_derived_3(struct nv50_context *nv50)
+{
+   struct nouveau_pushbuf *push = nv50->base.pushbuf;
+   struct pipe_framebuffer_state *fb = &nv50->framebuffer;
+   uint32_t ms = 0;
+
+   if ((!fb->nr_cbufs || !fb->cbufs[0] ||
+        !util_format_is_pure_integer(fb->cbufs[0]->format)) && nv50->blend) {
+      if (nv50->blend->pipe.alpha_to_coverage)
+         ms |= NV50_3D_MULTISAMPLE_CTRL_ALPHA_TO_COVERAGE;
+      if (nv50->blend->pipe.alpha_to_one)
+         ms |= NV50_3D_MULTISAMPLE_CTRL_ALPHA_TO_ONE;
+   }
+
+   BEGIN_NV04(push, NV50_3D(MULTISAMPLE_CTRL), 1);
+   PUSH_DATA (push, ms);
+}
+
+static void
 nv50_validate_clip(struct nv50_context *nv50)
 {
    struct nouveau_pushbuf *push = nv50->base.pushbuf;
@@ -474,6 +495,7 @@ static struct state_validate {
     { nv50_validate_derived_rs,    NV50_NEW_FRAGPROG | NV50_NEW_RASTERIZER |
                                    NV50_NEW_VERTPROG | NV50_NEW_GMTYPROG },
     { nv50_validate_derived_2,     NV50_NEW_ZSA | NV50_NEW_FRAMEBUFFER },
+    { nv50_validate_derived_3,     NV50_NEW_BLEND | NV50_NEW_FRAMEBUFFER },
     { nv50_validate_clip,          NV50_NEW_CLIP | NV50_NEW_RASTERIZER |
                                    NV50_NEW_VERTPROG | NV50_NEW_GMTYPROG },
     { nv50_constbufs_validate,     NV50_NEW_CONSTBUF },
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_stateobj.h b/src/gallium/drivers/nouveau/nv50/nv50_stateobj.h
index cf75d1e..4b1d00c 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_stateobj.h
+++ b/src/gallium/drivers/nouveau/nv50/nv50_stateobj.h
@@ -19,7 +19,7 @@
 struct nv50_blend_stateobj {
    struct pipe_blend_state pipe;
    int size;
-   uint32_t state[84]; // TODO: allocate less if !independent_blend_enable
+   uint32_t state[82]; // TODO: allocate less if !independent_blend_enable
 };
 
 struct nv50_rasterizer_stateobj {