broadcom/vc5: Move default attribute value setup to the CSO and fix them.

I was generating some stub values to bring the driver up, but fill them in
properly now.  We now set 1.0 or 1u as appropriate, and thanks to being in
their own BO it fixes piglit failures on the 7268 (where our 4-byte
alignment was insufficient).

Fixes const-packHalf2x16.shader_test

3 files changed, 23 insertions, 29 deletions

diff --git a/src/gallium/drivers/vc5/vc5_context.h b/src/gallium/drivers/vc5/vc5_context.h
index 08d96f36ecf..a1017bd1a6a 100644
--- a/src/gallium/drivers/vc5/vc5_context.h
+++ b/src/gallium/drivers/vc5/vc5_context.h
@@ -164,6 +164,7 @@ struct vc5_vertex_stateobj {
         unsigned num_elements;
 
         uint8_t attrs[12 * VC5_MAX_ATTRIBUTES];
+        struct vc5_bo *default_attribute_values;
 };
 
 struct vc5_streamout_stateobj {
diff --git a/src/gallium/drivers/vc5/vc5_draw.c b/src/gallium/drivers/vc5/vc5_draw.c
index f6c22c9d182..11d9e92a96b 100644
--- a/src/gallium/drivers/vc5/vc5_draw.c
+++ b/src/gallium/drivers/vc5/vc5_draw.c
@@ -123,32 +123,6 @@ vc5_predraw_check_textures(struct pipe_context *pctx,
         }
 }
 
-static struct vc5_cl_reloc
-vc5_get_default_values(struct vc5_context *vc5)
-{
-        struct vc5_job *job = vc5->job;
-
-        /* VC5_DIRTY_VTXSTATE */
-        struct vc5_vertex_stateobj *vtx = vc5->vtx;
-
-        /* Set up the default values for attributes. */
-        vc5_cl_ensure_space(&job->indirect, 4 * 4 * vtx->num_elements, 4);
-        struct vc5_cl_reloc default_values =
-                cl_address(job->indirect.bo, cl_offset(&job->indirect));
-        vc5_bo_reference(default_values.bo);
-
-        struct vc5_cl_out *defaults = cl_start(&job->indirect);
-        for (int i = 0; i < vtx->num_elements; i++) {
-                cl_aligned_f(&defaults, 0.0);
-                cl_aligned_f(&defaults, 0.0);
-                cl_aligned_f(&defaults, 0.0);
-                cl_aligned_f(&defaults, 1.0);
-        }
-        cl_end(&job->indirect, defaults);
-
-        return default_values;
-}
-
 static void
 vc5_emit_gl_shader_state(struct vc5_context *vc5,
                          const struct pipe_draw_info *info)
@@ -172,7 +146,6 @@ vc5_emit_gl_shader_state(struct vc5_context *vc5,
                 vc5_write_uniforms(vc5, vc5->prog.cs,
                                    &vc5->constbuf[PIPE_SHADER_VERTEX],
                                    &vc5->verttex);
-        struct vc5_cl_reloc default_values = vc5_get_default_values(vc5);
 
         uint32_t shader_rec_offset =
                 vc5_cl_ensure_space(&job->indirect,
@@ -236,7 +209,8 @@ vc5_emit_gl_shader_state(struct vc5_context *vc5,
                 shader.instance_id_read_by_vertex_shader =
                         vc5->prog.vs->prog_data.vs->uses_iid;
 
-                shader.address_of_default_attribute_values = default_values;
+                shader.address_of_default_attribute_values =
+                        cl_address(vtx->default_attribute_values, 0);
         }
 
         for (int i = 0; i < vtx->num_elements; i++) {
@@ -274,7 +248,6 @@ vc5_emit_gl_shader_state(struct vc5_context *vc5,
         vc5_bo_unreference(&cs_uniforms.bo);
         vc5_bo_unreference(&vs_uniforms.bo);
         vc5_bo_unreference(&fs_uniforms.bo);
-        vc5_bo_unreference(&default_values.bo);
 
         job->shader_rec_count++;
 }
diff --git a/src/gallium/drivers/vc5/vc5_state.c b/src/gallium/drivers/vc5/vc5_state.c
index 98426de977b..eebf94b4b9c 100644
--- a/src/gallium/drivers/vc5/vc5_state.c
+++ b/src/gallium/drivers/vc5/vc5_state.c
@@ -238,6 +238,7 @@ static void *
 vc5_vertex_state_create(struct pipe_context *pctx, unsigned num_elements,
                         const struct pipe_vertex_element *elements)
 {
+        struct vc5_context *vc5 = vc5_context(pctx);
         struct vc5_vertex_stateobj *so = CALLOC_STRUCT(vc5_vertex_stateobj);
 
         if (!so)
@@ -311,6 +312,25 @@ vc5_vertex_state_create(struct pipe_context *pctx, unsigned num_elements,
                                                             &attr_unpacked);
         }
 
+        /* Set up the default attribute values in case any of the vertex
+         * elements use them.
+         */
+        so->default_attribute_values = vc5_bo_alloc(vc5->screen,
+                                                    VC5_MAX_ATTRIBUTES *
+                                                    4 * sizeof(float),
+                                                    "default attributes");
+        uint32_t *attrs = vc5_bo_map(so->default_attribute_values);
+        for (int i = 0; i < VC5_MAX_ATTRIBUTES; i++) {
+                attrs[i * 4 + 0] = 0;
+                attrs[i * 4 + 1] = 0;
+                attrs[i * 4 + 2] = 0;
+                if (i < so->num_elements &&
+                    util_format_is_pure_integer(so->pipe[i].src_format)) {
+                        attrs[i * 4 + 3] = 1;
+                } else {
+                        attrs[i * 4 + 3] = fui(1.0);
+                }
+        }
 
         return so;
 }