nvc0: upload sample locations on GM20x

This fixes a bunch of multisample piglit tests on GM206, like
bin/arb_texture_multisample-texelfetch 2 -auto -fbo

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

3 files changed, 31 insertions, 5 deletions

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_context.c b/src/gallium/drivers/nouveau/nvc0/nvc0_context.c
index 4bd240bf454..9cbc0c9aa50 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_context.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_context.c
@@ -502,10 +502,8 @@ nvc0_bufctx_fence(struct nvc0_context *nvc0, struct nouveau_bufctx *bufctx,
    NOUVEAU_DRV_STAT(&nvc0->screen->base, resource_validate_count, count);
 }
 
-static void
-nvc0_context_get_sample_position(struct pipe_context *pipe,
-                                 unsigned sample_count, unsigned sample_index,
-                                 float *xy)
+const void *
+nvc0_get_sample_locations(unsigned sample_count)
 {
    static const uint8_t ms1[1][2] = { { 0x8, 0x8 } };
    static const uint8_t ms2[2][2] = {
@@ -537,8 +535,22 @@ nvc0_context_get_sample_position(struct pipe_context *pipe,
    case 8: ptr = ms8; break;
    default:
       assert(0);
-      return; /* bad sample count -> undefined locations */
+      return NULL; /* bad sample count -> undefined locations */
    }
+   return ptr;
+}
+
+static void
+nvc0_context_get_sample_position(struct pipe_context *pipe,
+                                 unsigned sample_count, unsigned sample_index,
+                                 float *xy)
+{
+   const uint8_t (*ptr)[2];
+
+   ptr = nvc0_get_sample_locations(sample_count);
+   if (!ptr)
+      return;
+
    xy[0] = ptr[sample_index][0] * 0.0625f;
    xy[1] = ptr[sample_index][1] * 0.0625f;
 }
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_context.h b/src/gallium/drivers/nouveau/nvc0/nvc0_context.h
index 6890f574c49..eddca4889e2 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_context.h
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_context.h
@@ -281,6 +281,7 @@ struct pipe_context *nvc0_create(struct pipe_screen *, void *, unsigned flags);
 void nvc0_bufctx_fence(struct nvc0_context *, struct nouveau_bufctx *,
                        bool on_flush);
 void nvc0_default_kick_notify(struct nouveau_pushbuf *);
+const void *nvc0_get_sample_locations(unsigned);
 
 /* nvc0_draw.c */
 extern struct draw_stage *nvc0_draw_render_stage(struct nvc0_context *);
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c b/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
index aa6bee8da5c..160abaed373 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
@@ -211,6 +211,19 @@ nvc0_validate_fb(struct nvc0_context *nvc0)
       PUSH_DATAf(push, xy[1]);
    }
 
+   if (screen->base.class_3d >= GM200_3D_CLASS) {
+      const uint8_t (*ptr)[2] = nvc0_get_sample_locations(ms);
+      uint32_t val[4] = {};
+
+      for (i = 0; i < 16; i++) {
+         val[i / 4] |= ptr[i % ms][0] << (((i % 4) * 8) + 0);
+         val[i / 4] |= ptr[i % ms][1] << (((i % 4) * 8) + 4);
+      }
+
+      BEGIN_NVC0(push, SUBC_3D(0x11e0), 4);
+      PUSH_DATAp(push, val, 4);
+   }
+
    if (serialize)
       IMMED_NVC0(push, NVC0_3D(SERIALIZE), 0);