[Nouveau] [PATCH] nv50: make sure to clear _all_ layers of all attachments

[Ilia Mirkin]

Unfortunately there's only one RT_ARRAY_MODE setting for all
attachments, so clears were previously truncated to the minimum number
of layers any attachment had. Instead set the RT_ARRAY_MODE to 512 (the
max number of layers) before doing the clear. This fixes
gl-3.2-layered-rendering-clear-color-mismatched-layer-count.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---

Haven't had a chance to do a full piglit run on this yet, but it does fix the
failing test. Have a look. I'm not sure if zeta can have layers, it seems like
a couple of things assumed it couldn't. I've changed that assumption around.

 src/gallium/drivers/nouveau/nv50/nv50_context.h       |  2 ++
 .../drivers/nouveau/nv50/nv50_state_validate.c        |  1 +
 src/gallium/drivers/nouveau/nv50/nv50_surface.c       | 19 +++++++++++++++++--
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_context.h b/src/gallium/drivers/nouveau/nv50/nv50_context.h
index 57a3090..84ff46e 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_context.h
+++ b/src/gallium/drivers/nouveau/nv50/nv50_context.h
@@ -173,6 +173,8 @@ struct nv50_context {
 
    boolean vbo_push_hint;
 
+   uint32_t rt_array_mode;
+
    struct pipe_query *cond_query;
    boolean cond_cond;
    uint cond_mode;
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c b/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c
index f953422..100d02d 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_state_validate.c
@@ -65,6 +65,7 @@ nv50_validate_fb(struct nv50_context *nv50)
          PUSH_DATA (push, sf->height);
          BEGIN_NV04(push, NV50_3D(RT_ARRAY_MODE), 1);
          PUSH_DATA (push, array_mode | array_size);
+         nv50->rt_array_mode = array_mode | array_size;
       } else {
          PUSH_DATA (push, 0);
          PUSH_DATA (push, 0);
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_surface.c b/src/gallium/drivers/nouveau/nv50/nv50_surface.c
index a22436b..68924c9 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_surface.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_surface.c
@@ -303,7 +303,7 @@ nv50_clear_render_target(struct pipe_context *pipe,
       PUSH_DATA(push, NV50_3D_RT_HORIZ_LINEAR | mt->level[0].pitch);
    PUSH_DATA (push, sf->height);
    BEGIN_NV04(push, NV50_3D(RT_ARRAY_MODE), 1);
-   PUSH_DATA (push, 1);
+   PUSH_DATA (push, 512);
 
    if (!nouveau_bo_memtype(bo)) {
       BEGIN_NV04(push, NV50_3D(ZETA_ENABLE), 1);
@@ -366,7 +366,7 @@ nv50_clear_depth_stencil(struct pipe_context *pipe,
    PUSH_DATA (push, bo->offset + sf->offset);
    PUSH_DATA (push, nv50_format_table[dst->format].rt);
    PUSH_DATA (push, mt->level[sf->base.u.tex.level].tile_mode);
-   PUSH_DATA (push, 0);
+   PUSH_DATA (push, mt->layer_stride >> 2);
    BEGIN_NV04(push, NV50_3D(ZETA_ENABLE), 1);
    PUSH_DATA (push, 1);
    BEGIN_NV04(push, NV50_3D(ZETA_HORIZ), 3);
@@ -374,6 +374,9 @@ nv50_clear_depth_stencil(struct pipe_context *pipe,
    PUSH_DATA (push, sf->height);
    PUSH_DATA (push, (1 << 16) | 1);
 
+   BEGIN_NV04(push, NV50_3D(RT_ARRAY_MODE), 1);
+   PUSH_DATA (push, 512);
+
    BEGIN_NV04(push, NV50_3D(VIEWPORT_HORIZ(0)), 2);
    PUSH_DATA (push, (width << 16) | dstx);
    PUSH_DATA (push, (height << 16) | dsty);
@@ -402,6 +405,14 @@ nv50_clear(struct pipe_context *pipe, unsigned buffers,
    if (!nv50_state_validate(nv50, NV50_NEW_FRAMEBUFFER, 9 + (fb->nr_cbufs * 2)))
       return;
 
+   /* We have to clear ALL of the layers, not up to the min number of layers
+    * of any attachment. Don't touch 3d textures, they can't be arrays. The
+    * above nv50_state_validate call will have written to rt_array_mode. */
+   if (!(nv50->rt_array_mode & NV50_3D_RT_ARRAY_MODE_MODE_3D)) {
+      BEGIN_NV04(push, NV50_3D(RT_ARRAY_MODE), 1);
+      PUSH_DATA (push, 512);
+   }
+
    if (buffers & PIPE_CLEAR_COLOR && fb->nr_cbufs) {
       BEGIN_NV04(push, NV50_3D(CLEAR_COLOR(0)), 4);
       PUSH_DATAf(push, color->f[0]);
@@ -459,6 +470,10 @@ nv50_clear(struct pipe_context *pipe, unsigned buffers,
                     (j << NV50_3D_CLEAR_BUFFERS_LAYER__SHIFT));
       }
    }
+
+   /* restore the array mode */
+   BEGIN_NV04(push, NV50_3D(RT_ARRAY_MODE), 1);
+   PUSH_DATA (push, nv50->rt_array_mode);
 }
 
 
-- 
1.8.3.2