From 3a728d4dfbd727c30f36116772803674beffcbb6 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 14 Apr 2015 11:31:11 -0700
Subject: [PATCH] vc4: Update the shadow texture for public textures on every
 draw.

We don't know who else has written to it, so we'd better update it every
time.  This makes the gears spin in X again.
---
 src/gallium/drivers/vc4/vc4_draw.c     | 18 ++++++++++++++++++
 src/gallium/drivers/vc4/vc4_resource.c |  2 +-
 src/gallium/drivers/vc4/vc4_state.c    |  7 +------
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/gallium/drivers/vc4/vc4_draw.c b/src/gallium/drivers/vc4/vc4_draw.c
index 717eb8a..16418bf 100644
--- a/src/gallium/drivers/vc4/vc4_draw.c
+++ b/src/gallium/drivers/vc4/vc4_draw.c
@@ -132,6 +132,20 @@ vc4_start_draw(struct vc4_context *vc4)
 }
 
 static void
+vc4_update_shadow_textures(struct pipe_context *pctx,
+                           struct vc4_texture_stateobj *stage_tex)
+{
+        for (int i = 0; i < stage_tex->num_textures; i++) {
+                struct pipe_sampler_view *view = stage_tex->textures[i];
+                if (!view)
+                        continue;
+                struct vc4_resource *rsc = vc4_resource(view->texture);
+                if (rsc->shadow_parent)
+                        vc4_update_shadow_baselevel_texture(pctx, view);
+        }
+}
+
+static void
 vc4_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
 {
         struct vc4_context *vc4 = vc4_context(pctx);
@@ -145,6 +159,10 @@ vc4_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
                 return;
         }
 
+        /* Before setting up the draw, do any fixup blits necessary. */
+        vc4_update_shadow_textures(pctx, &vc4->verttex);
+        vc4_update_shadow_textures(pctx, &vc4->fragtex);
+
         vc4_get_draw_cl_space(vc4);
 
         struct vc4_vertex_stateobj *vtx = vc4->vtx;
diff --git a/src/gallium/drivers/vc4/vc4_resource.c b/src/gallium/drivers/vc4/vc4_resource.c
index 94bab99..3f180d5 100644
--- a/src/gallium/drivers/vc4/vc4_resource.c
+++ b/src/gallium/drivers/vc4/vc4_resource.c
@@ -583,7 +583,7 @@ vc4_update_shadow_baselevel_texture(struct pipe_context *pctx,
         struct vc4_resource *orig = vc4_resource(shadow->shadow_parent);
         assert(orig);
 
-        if (shadow->writes == orig->writes)
+        if (shadow->writes == orig->writes && orig->bo->private)
                 return;
 
         perf_debug("Updating shadow texture due to %s\n",
diff --git a/src/gallium/drivers/vc4/vc4_state.c b/src/gallium/drivers/vc4/vc4_state.c
index df75b6e..80e963e 100644
--- a/src/gallium/drivers/vc4/vc4_state.c
+++ b/src/gallium/drivers/vc4/vc4_state.c
@@ -578,13 +578,8 @@ vc4_set_sampler_views(struct pipe_context *pctx, unsigned shader,
         vc4->dirty |= VC4_DIRTY_TEXSTATE;
 
         for (i = 0; i < nr; i++) {
-                if (views[i]) {
-                        struct vc4_resource *rsc =
-                                vc4_resource(views[i]->texture);
+                if (views[i])
                         new_nr = i + 1;
-                        if (rsc->shadow_parent)
-                                vc4_update_shadow_baselevel_texture(pctx, views[i]);
-                }
                 pipe_sampler_view_reference(&stage_tex->textures[i], views[i]);
                 stage_tex->dirty_samplers |= (1 << i);
         }
-- 
2.7.4